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- /*
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Van Jacobson of Lawrence Berkeley Laboratory.
- *
- * 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.
- *
- * @(#)sd.c 7.8 (Berkeley) 6/9/91
- */
-
- /*
- * SCSI CCS (Command Command Set) disk driver.
- */
- #include "sd.h"
- #if NSD > 0
-
- #ifndef lint
- static char rcsid[] = "$Header: sd.c,v 1.15 91/04/24 11:54:30 mike Exp $";
- #endif
-
- #include "sys/param.h"
- #include "sys/systm.h"
- #include "sys/buf.h"
- #include "sys/dkstat.h"
- #include "sys/disklabel.h"
- #include "sys/malloc.h"
- #include "sys/proc.h"
-
- #include "device.h"
- #include "scsireg.h"
- #include "vm/vm_param.h"
- #include "vm/lock.h"
- #include "vm/vm_statistics.h"
- #include "vm/pmap.h"
- #include "vm/vm_prot.h"
-
- extern int scsi_test_unit_rdy();
- extern int scsi_request_sense();
- extern int scsi_inquiry();
- extern int scsi_read_capacity();
- extern int scsi_tt_write();
- extern int scsireq();
- extern int scsiustart();
- extern int scsigo();
- extern void scsifree();
- extern void scsireset();
- extern void scsi_delay();
-
- extern void disksort();
- extern void biodone();
- extern int physio();
- extern void TBIS();
-
- int sdinit();
- void sdstrategy(), sdstart(), sdustart(), sdgo(), sdintr();
-
- struct driver sddriver = {
- sdinit, "sd", (int (*)())sdstart, (int (*)())sdgo, (int (*)())sdintr,
- };
-
- struct size {
- u_long strtblk;
- u_long endblk;
- int nblocks;
- };
-
- struct sdinfo {
- struct size part[8];
- };
-
- /*
- * since the SCSI standard tends to hide the disk structure, we define
- * partitions in terms of DEV_BSIZE blocks. The default partition table
- * (for an unlabeled disk) reserves 512K for a boot area, has an 8 meg
- * root and 32 meg of swap. The rest of the space on the drive goes in
- * the G partition. As usual, the C partition covers the entire disk
- * (including the boot area).
- */
- struct sdinfo sddefaultpart = {
- 1024, 17408, 16384 , /* A */
- 17408, 82944, 65536 , /* B */
- 0, 0, 0 , /* C */
- 17408, 115712, 98304 , /* D */
- 115712, 218112, 102400 , /* E */
- 218112, 0, 0 , /* F */
- 82944, 0, 0 , /* G */
- 115712, 0, 0 , /* H */
- };
-
- struct sd_softc {
- struct hp_device *sc_hd;
- struct devqueue sc_dq;
- int sc_format_pid; /* process using "format" mode */
- short sc_flags;
- short sc_type; /* drive type */
- short sc_punit; /* physical unit (scsi lun) */
- u_short sc_bshift; /* convert device blocks to DEV_BSIZE blks */
- u_int sc_blks; /* number of blocks on device */
- int sc_blksize; /* device block size in bytes */
- u_int sc_wpms; /* average xfer rate in 16 bit wds/sec. */
- struct sdinfo sc_info; /* drive partition table & label info */
- } sd_softc[NSD];
-
- /* sc_flags values */
- #define SDF_ALIVE 0x1
-
- #ifdef DEBUG
- int sddebug = 1;
- #define SDB_ERROR 0x01
- #define SDB_PARTIAL 0x02
- #endif
-
- struct sdstats {
- long sdresets;
- long sdtransfers;
- long sdpartials;
- } sdstats[NSD];
-
- struct buf sdtab[NSD];
- struct scsi_fmt_cdb sdcmd[NSD];
- struct scsi_fmt_sense sdsense[NSD];
-
- static struct scsi_fmt_cdb sd_read_cmd = { 10, CMD_READ_EXT };
- static struct scsi_fmt_cdb sd_write_cmd = { 10, CMD_WRITE_EXT };
-
- #define sdunit(x) (minor(x) >> 3)
- #define sdpart(x) (minor(x) & 0x7)
- #define sdpunit(x) ((x) & 7)
- #define b_cylin b_resid
-
- #define SDRETRY 2
-
- /*
- * Table of scsi commands users are allowed to access via "format"
- * mode. 0 means not legal. 1 means "immediate" (doesn't need dma).
- * -1 means needs dma and/or wait for intr.
- */
- static char legal_cmds[256] = {
- /***** 0 1 2 3 4 5 6 7 8 9 A B C D E F */
- /*00*/ 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*10*/ 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
- /*20*/ 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*30*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*40*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*50*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*60*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*70*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*80*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*90*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*a0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*b0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*c0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*d0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*e0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /*f0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- };
-
- static struct scsi_inquiry inqbuf;
- static struct scsi_fmt_cdb inq = {
- 6,
- CMD_INQUIRY, 0, 0, 0, sizeof(inqbuf), 0
- };
-
- static u_char capbuf[8];
- struct scsi_fmt_cdb cap = {
- 10,
- CMD_READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
-
- static int
- sdident(sc, hd)
- struct sd_softc *sc;
- struct hp_device *hd;
- {
- int unit;
- register int ctlr, slave;
- register int i;
- register int tries = 10;
- char idstr[32];
- int ismo = 0;
-
- ctlr = hd->hp_ctlr;
- slave = hd->hp_slave;
- unit = sc->sc_punit;
- scsi_delay(-1);
-
- /*
- * See if unit exists and is a disk then read block size & nblocks.
- */
- while ((i = scsi_test_unit_rdy(ctlr, slave, unit)) != 0) {
- if (i == -1 || --tries < 0) {
- if (ismo)
- break;
- /* doesn't exist or not a CCS device */
- goto failed;
- }
- if (i == STS_CHECKCOND) {
- u_char sensebuf[128];
- struct scsi_xsense *sp = (struct scsi_xsense *)sensebuf;
-
- scsi_request_sense(ctlr, slave, unit, sensebuf,
- sizeof(sensebuf));
- if (sp->class == 7)
- switch (sp->key) {
- /* not ready -- might be MO with no media */
- case 2:
- if (sp->len == 12 &&
- sensebuf[12] == 10) /* XXX */
- ismo = 1;
- break;
- /* drive doing an RTZ -- give it a while */
- case 6:
- DELAY(1000000);
- break;
- default:
- break;
- }
- }
- DELAY(1000);
- }
- /*
- * Find out about device
- */
- if (scsi_immed_command(ctlr, slave, unit, &inq,
- (u_char *)&inqbuf, sizeof(inqbuf), B_READ))
- goto failed;
- switch (inqbuf.type) {
- case 0: /* disk */
- case 4: /* WORM */
- case 5: /* CD-ROM */
- case 7: /* Magneto-optical */
- break;
- default: /* not a disk */
- goto failed;
- }
- /*
- * Get a usable id string
- */
- if (inqbuf.version != 1) {
- bcopy("UNKNOWN", &idstr[0], 8);
- bcopy("DRIVE TYPE", &idstr[8], 11);
- } else {
- 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;
- }
- i = scsi_immed_command(ctlr, slave, unit, &cap,
- (u_char *)&capbuf, sizeof(capbuf), B_READ);
- if (i) {
- if (i != STS_CHECKCOND ||
- bcmp(&idstr[0], "HP", 3) ||
- bcmp(&idstr[8], "S6300.650A", 11))
- goto failed;
- /* XXX unformatted or non-existant MO media; fake it */
- sc->sc_blks = 318664;
- sc->sc_blksize = 1024;
- } else {
- sc->sc_blks = *(u_int *)&capbuf[0];
- sc->sc_blksize = *(int *)&capbuf[4];
- }
- /* return value of read capacity is last valid block number */
- sc->sc_blks++;
-
- if (inqbuf.version != 1)
- printf("sd%d: type 0x%x, qual 0x%x, ver %d", hd->hp_unit,
- inqbuf.type, inqbuf.qual, inqbuf.version);
- else
- printf("sd%d: %s %s rev %s", hd->hp_unit, idstr, &idstr[8],
- &idstr[24]);
- printf(", %d %d byte blocks\n", sc->sc_blks, sc->sc_blksize);
- if (sc->sc_blksize != DEV_BSIZE) {
- if (sc->sc_blksize < DEV_BSIZE) {
- printf("sd%d: need %d byte blocks - drive ignored\n",
- unit, DEV_BSIZE);
- goto failed;
- }
- for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1)
- ++sc->sc_bshift;
- sc->sc_blks <<= sc->sc_bshift;
- }
- sc->sc_wpms = 32 * (60 * DEV_BSIZE / 2); /* XXX */
- scsi_delay(0);
- return(inqbuf.type);
- failed:
- scsi_delay(0);
- return(-1);
- }
-
- int
- sdinit(hd)
- register struct hp_device *hd;
- {
- register struct sd_softc *sc = &sd_softc[hd->hp_unit];
-
- sc->sc_hd = hd;
- sc->sc_punit = sdpunit(hd->hp_flags);
- sc->sc_type = sdident(sc, hd);
- if (sc->sc_type < 0)
- return(0);
- sc->sc_dq.dq_ctlr = hd->hp_ctlr;
- sc->sc_dq.dq_unit = hd->hp_unit;
- sc->sc_dq.dq_slave = hd->hp_slave;
- sc->sc_dq.dq_driver = &sddriver;
-
- /*
- * If we don't have a disk label, build a default partition
- * table with 'standard' size root & swap and everything else
- * in the G partition.
- */
- sc->sc_info = sddefaultpart;
- /* C gets everything */
- sc->sc_info.part[2].nblocks = sc->sc_blks;
- sc->sc_info.part[2].endblk = sc->sc_blks;
- /* G gets from end of B to end of disk */
- sc->sc_info.part[6].nblocks = sc->sc_blks - sc->sc_info.part[1].endblk;
- sc->sc_info.part[6].endblk = sc->sc_blks;
- /*
- * We also define the D, E and F paritions as an alternative to
- * B and G. D is 48Mb, starts after A and is intended for swapping.
- * E is 50Mb, starts after D and is intended for /usr. F starts
- * after E and is what ever is left.
- */
- if (sc->sc_blks >= sc->sc_info.part[4].endblk) {
- sc->sc_info.part[5].nblocks =
- sc->sc_blks - sc->sc_info.part[4].endblk;
- sc->sc_info.part[5].endblk = sc->sc_blks;
- } else {
- sc->sc_info.part[5].strtblk = 0;
- sc->sc_info.part[3] = sc->sc_info.part[5];
- sc->sc_info.part[4] = sc->sc_info.part[5];
- }
- /*
- * H is a single partition alternative to E and F.
- */
- if (sc->sc_blks >= sc->sc_info.part[3].endblk) {
- sc->sc_info.part[7].nblocks =
- sc->sc_blks - sc->sc_info.part[3].endblk;
- sc->sc_info.part[7].endblk = sc->sc_blks;
- } else {
- sc->sc_info.part[7].strtblk = 0;
- }
-
- sc->sc_flags = SDF_ALIVE;
- return(1);
- }
-
- void
- sdreset(sc, hd)
- register struct sd_softc *sc;
- register struct hp_device *hd;
- {
- sdstats[hd->hp_unit].sdresets++;
- }
-
- int
- sdopen(dev, flags, mode, p)
- dev_t dev;
- int flags, mode;
- struct proc *p;
- {
- register int unit = sdunit(dev);
- register struct sd_softc *sc = &sd_softc[unit];
-
- if (unit >= NSD)
- return(ENXIO);
- if ((sc->sc_flags & SDF_ALIVE) == 0 && suser(p->p_ucred, &p->p_acflag))
- return(ENXIO);
-
- if (sc->sc_hd->hp_dk >= 0)
- dk_wpms[sc->sc_hd->hp_dk] = sc->sc_wpms;
- return(0);
- }
-
- /*
- * This routine is called for partial block transfers and non-aligned
- * transfers (the latter only being possible on devices with a block size
- * larger than DEV_BSIZE). The operation is performed in three steps
- * using a locally allocated buffer:
- * 1. transfer any initial partial block
- * 2. transfer full blocks
- * 3. transfer any final partial block
- */
- static void
- sdlblkstrat(bp, bsize)
- register struct buf *bp;
- register int bsize;
- {
- register struct buf *cbp = (struct buf *)malloc(sizeof(struct buf),
- M_DEVBUF, M_WAITOK);
- caddr_t cbuf = (caddr_t)malloc(bsize, M_DEVBUF, M_WAITOK);
- register int bn, resid;
- register caddr_t addr;
-
- bzero((caddr_t)cbp, sizeof(*cbp));
- cbp->b_proc = curproc; /* XXX */
- cbp->b_dev = bp->b_dev;
- bn = bp->b_blkno;
- resid = bp->b_bcount;
- addr = bp->b_un.b_addr;
- #ifdef DEBUG
- if (sddebug & SDB_PARTIAL)
- printf("sdlblkstrat: bp %x flags %x bn %x resid %x addr %x\n",
- bp, bp->b_flags, bn, resid, addr);
- #endif
-
- while (resid > 0) {
- register int boff = dbtob(bn) & (bsize - 1);
- register int count;
-
- if (boff || resid < bsize) {
- sdstats[sdunit(bp->b_dev)].sdpartials++;
- count = MIN(resid, bsize - boff);
- cbp->b_flags = B_BUSY | B_PHYS | B_READ;
- cbp->b_blkno = bn - btodb(boff);
- cbp->b_un.b_addr = cbuf;
- cbp->b_bcount = bsize;
- #ifdef DEBUG
- if (sddebug & SDB_PARTIAL)
- printf(" readahead: bn %x cnt %x off %x addr %x\n",
- cbp->b_blkno, count, boff, addr);
- #endif
- sdstrategy(cbp);
- biowait(cbp);
- if (cbp->b_flags & B_ERROR) {
- bp->b_flags |= B_ERROR;
- bp->b_error = cbp->b_error;
- break;
- }
- if (bp->b_flags & B_READ) {
- bcopy(&cbuf[boff], addr, count);
- goto done;
- }
- bcopy(addr, &cbuf[boff], count);
- #ifdef DEBUG
- if (sddebug & SDB_PARTIAL)
- printf(" writeback: bn %x cnt %x off %x addr %x\n",
- cbp->b_blkno, count, boff, addr);
- #endif
- } else {
- count = resid & ~(bsize - 1);
- cbp->b_blkno = bn;
- cbp->b_un.b_addr = addr;
- cbp->b_bcount = count;
- #ifdef DEBUG
- if (sddebug & SDB_PARTIAL)
- printf(" fulltrans: bn %x cnt %x addr %x\n",
- cbp->b_blkno, count, addr);
- #endif
- }
- cbp->b_flags = B_BUSY | B_PHYS | (bp->b_flags & B_READ);
- sdstrategy(cbp);
- biowait(cbp);
- if (cbp->b_flags & B_ERROR) {
- bp->b_flags |= B_ERROR;
- bp->b_error = cbp->b_error;
- break;
- }
- done:
- bn += btodb(count);
- resid -= count;
- addr += count;
- #ifdef DEBUG
- if (sddebug & SDB_PARTIAL)
- printf(" done: bn %x resid %x addr %x\n",
- bn, resid, addr);
- #endif
- }
- free(cbuf, M_DEVBUF);
- free(cbp, M_DEVBUF);
- }
-
- void
- sdstrategy(bp)
- register struct buf *bp;
- {
- register int unit = sdunit(bp->b_dev);
- register struct sd_softc *sc = &sd_softc[unit];
- register struct size *pinfo = &sc->sc_info.part[sdpart(bp->b_dev)];
- register struct buf *dp = &sdtab[unit];
- register daddr_t bn;
- register int sz, s;
-
- if (sc->sc_format_pid) {
- if (sc->sc_format_pid != curproc->p_pid) { /* XXX */
- bp->b_error = EPERM;
- bp->b_flags |= B_ERROR;
- goto done;
- }
- bp->b_cylin = 0;
- } else {
- bn = bp->b_blkno;
- sz = howmany(bp->b_bcount, DEV_BSIZE);
- if (bn < 0 || bn + sz > pinfo->nblocks) {
- sz = pinfo->nblocks - bn;
- if (sz == 0) {
- bp->b_resid = bp->b_bcount;
- goto done;
- }
- if (sz < 0) {
- bp->b_error = EINVAL;
- bp->b_flags |= B_ERROR;
- goto done;
- }
- bp->b_bcount = dbtob(sz);
- }
- /*
- * Non-aligned or partial-block transfers handled specially.
- */
- s = sc->sc_blksize - 1;
- if ((dbtob(bn) & s) || (bp->b_bcount & s)) {
- sdlblkstrat(bp, sc->sc_blksize);
- goto done;
- }
- bp->b_cylin = (bn + pinfo->strtblk) >> sc->sc_bshift;
- }
- s = splbio();
- disksort(dp, bp);
- if (dp->b_active == 0) {
- dp->b_active = 1;
- sdustart(unit);
- }
- splx(s);
- return;
- done:
- biodone(bp);
- }
-
- void
- sdustart(unit)
- register int unit;
- {
- if (scsireq(&sd_softc[unit].sc_dq))
- sdstart(unit);
- }
-
- /*
- * Return:
- * 0 if not really an error
- * <0 if we should do a retry
- * >0 if a fatal error
- */
- static int
- sderror(unit, sc, hp, stat)
- int unit, stat;
- register struct sd_softc *sc;
- register struct hp_device *hp;
- {
- int cond = 1;
-
- sdsense[unit].status = stat;
- if (stat & STS_CHECKCOND) {
- struct scsi_xsense *sp;
-
- scsi_request_sense(hp->hp_ctlr, hp->hp_slave,
- sc->sc_punit, sdsense[unit].sense,
- sizeof(sdsense[unit].sense));
- sp = (struct scsi_xsense *)sdsense[unit].sense;
- printf("sd%d: scsi sense class %d, code %d", unit,
- sp->class, sp->code);
- if (sp->class == 7) {
- printf(", key %d", sp->key);
- if (sp->valid)
- printf(", blk %d", *(int *)&sp->info1);
- switch (sp->key) {
- /* no sense, try again */
- case 0:
- cond = -1;
- break;
- /* recovered error, not a problem */
- case 1:
- cond = 0;
- break;
- }
- }
- printf("\n");
- }
- return(cond);
- }
-
- static void
- sdfinish(unit, sc, bp)
- int unit;
- register struct sd_softc *sc;
- register struct buf *bp;
- {
- sdtab[unit].b_errcnt = 0;
- sdtab[unit].b_actf = bp->b_actf;
- bp->b_resid = 0;
- biodone(bp);
- scsifree(&sc->sc_dq);
- if (sdtab[unit].b_actf)
- sdustart(unit);
- else
- sdtab[unit].b_active = 0;
- }
-
- void
- sdstart(unit)
- register int unit;
- {
- register struct sd_softc *sc = &sd_softc[unit];
- register struct hp_device *hp = sc->sc_hd;
-
- /*
- * we have the SCSI bus -- in format mode, we may or may not need dma
- * so check now.
- */
- if (sc->sc_format_pid && legal_cmds[sdcmd[unit].cdb[0]] > 0) {
- register struct buf *bp = sdtab[unit].b_actf;
- register int sts;
-
- sts = scsi_immed_command(hp->hp_ctlr, hp->hp_slave,
- sc->sc_punit, &sdcmd[unit],
- bp->b_un.b_addr, bp->b_bcount,
- bp->b_flags & B_READ);
- sdsense[unit].status = sts;
- if (sts & 0xfe) {
- (void) sderror(unit, sc, hp, sts);
- bp->b_flags |= B_ERROR;
- bp->b_error = EIO;
- }
- sdfinish(unit, sc, bp);
-
- } else if (scsiustart(hp->hp_ctlr))
- sdgo(unit);
- }
-
- void
- sdgo(unit)
- register int unit;
- {
- register struct sd_softc *sc = &sd_softc[unit];
- register struct hp_device *hp = sc->sc_hd;
- register struct buf *bp = sdtab[unit].b_actf;
- register int pad;
- register struct scsi_fmt_cdb *cmd;
-
- if (sc->sc_format_pid) {
- cmd = &sdcmd[unit];
- pad = 0;
- } else {
- cmd = bp->b_flags & B_READ? &sd_read_cmd : &sd_write_cmd;
- *(int *)(&cmd->cdb[2]) = bp->b_cylin;
- pad = howmany(bp->b_bcount, sc->sc_blksize);
- *(u_short *)(&cmd->cdb[7]) = pad;
- pad = (bp->b_bcount & (sc->sc_blksize - 1)) != 0;
- #ifdef DEBUG
- if (pad)
- printf("sd%d: partial block xfer -- %x bytes\n",
- unit, bp->b_bcount);
- #endif
- sdstats[unit].sdtransfers++;
- }
- if (scsigo(hp->hp_ctlr, hp->hp_slave, sc->sc_punit, bp, cmd, pad) == 0) {
- if (hp->hp_dk >= 0) {
- dk_busy |= 1 << hp->hp_dk;
- ++dk_seek[hp->hp_dk];
- ++dk_xfer[hp->hp_dk];
- dk_wds[hp->hp_dk] += bp->b_bcount >> 6;
- }
- return;
- }
- #ifdef DEBUG
- if (sddebug & SDB_ERROR)
- printf("sd%d: sdstart: %s adr %d blk %d len %d ecnt %d\n",
- unit, bp->b_flags & B_READ? "read" : "write",
- bp->b_un.b_addr, bp->b_cylin, bp->b_bcount,
- sdtab[unit].b_errcnt);
- #endif
- bp->b_flags |= B_ERROR;
- bp->b_error = EIO;
- sdfinish(unit, sc, bp);
- }
-
- void
- sdintr(unit, stat)
- register int unit;
- int stat;
- {
- register struct sd_softc *sc = &sd_softc[unit];
- register struct buf *bp = sdtab[unit].b_actf;
- register struct hp_device *hp = sc->sc_hd;
- int cond;
-
- if (bp == NULL) {
- printf("sd%d: bp == NULL\n", unit);
- return;
- }
- if (hp->hp_dk >= 0)
- dk_busy &=~ (1 << hp->hp_dk);
- if (stat) {
- #ifdef DEBUG
- if (sddebug & SDB_ERROR)
- printf("sd%d: sdintr: bad scsi status 0x%x\n",
- unit, stat);
- #endif
- cond = sderror(unit, sc, hp, stat);
- if (cond) {
- if (cond < 0 && sdtab[unit].b_errcnt++ < SDRETRY) {
- #ifdef DEBUG
- if (sddebug & SDB_ERROR)
- printf("sd%d: retry #%d\n",
- unit, sdtab[unit].b_errcnt);
- #endif
- sdstart(unit);
- return;
- }
- bp->b_flags |= B_ERROR;
- bp->b_error = EIO;
- }
- }
- sdfinish(unit, sc, bp);
- }
-
- int
- sdread(dev, uio, flags)
- dev_t dev;
- struct uio *uio;
- int flags;
- {
- register int unit = sdunit(dev);
- register int pid;
-
- if ((pid = sd_softc[unit].sc_format_pid) &&
- pid != uio->uio_procp->p_pid)
- return (EPERM);
-
- return (physio(sdstrategy, NULL, dev, B_READ, minphys, uio));
- }
-
- int
- sdwrite(dev, uio, flags)
- dev_t dev;
- struct uio *uio;
- int flags;
- {
- register int unit = sdunit(dev);
- register int pid;
-
- if ((pid = sd_softc[unit].sc_format_pid) &&
- pid != uio->uio_procp->p_pid)
- return (EPERM);
-
- return (physio(sdstrategy, NULL, dev, B_WRITE, minphys, uio));
- }
-
- int
- sdioctl(dev, cmd, data, flag, p)
- dev_t dev;
- int cmd;
- caddr_t data;
- int flag;
- struct proc *p;
- {
- register int unit = sdunit(dev);
- register struct sd_softc *sc = &sd_softc[unit];
-
- switch (cmd) {
- default:
- return (EINVAL);
-
- case SDIOCSFORMAT:
- /* take this device into or out of "format" mode */
- if (suser(p->p_ucred, &p->p_acflag))
- return(EPERM);
-
- if (*(int *)data) {
- if (sc->sc_format_pid)
- return (EPERM);
- sc->sc_format_pid = p->p_pid;
- } else
- sc->sc_format_pid = 0;
- return (0);
-
- case SDIOCGFORMAT:
- /* find out who has the device in format mode */
- *(int *)data = sc->sc_format_pid;
- return (0);
-
- case SDIOCSCSICOMMAND:
- /*
- * Save what user gave us as SCSI cdb to use with next
- * read or write to the char device.
- */
- if (sc->sc_format_pid != p->p_pid)
- return (EPERM);
- if (legal_cmds[((struct scsi_fmt_cdb *)data)->cdb[0]] == 0)
- return (EINVAL);
- bcopy(data, (caddr_t)&sdcmd[unit], sizeof(sdcmd[0]));
- return (0);
-
- case SDIOCSENSE:
- /*
- * return the SCSI sense data saved after the last
- * operation that completed with "check condition" status.
- */
- bcopy((caddr_t)&sdsense[unit], data, sizeof(sdsense[0]));
- return (0);
-
- }
- /*NOTREACHED*/
- }
-
- int
- sdsize(dev)
- dev_t dev;
- {
- register int unit = sdunit(dev);
- register struct sd_softc *sc = &sd_softc[unit];
-
- if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
- return(-1);
-
- return(sc->sc_info.part[sdpart(dev)].nblocks);
- }
-
- /*
- * Non-interrupt driven, non-dma dump routine.
- */
- int
- sddump(dev)
- dev_t dev;
- {
- int part = sdpart(dev);
- int unit = sdunit(dev);
- register struct sd_softc *sc = &sd_softc[unit];
- register struct hp_device *hp = sc->sc_hd;
- register daddr_t baddr;
- register int maddr;
- register int pages, i;
- int stat;
- extern int lowram;
-
- /*
- * Hmm... all vax drivers dump maxfree pages which is physmem minus
- * the message buffer. Is there a reason for not dumping the
- * message buffer? Savecore expects to read 'dumpsize' pages of
- * dump, where dumpsys() sets dumpsize to physmem!
- */
- pages = physmem;
-
- /* is drive ok? */
- if (unit >= NSD || (sc->sc_flags & SDF_ALIVE) == 0)
- return (ENXIO);
- /* dump parameters in range? */
- if (dumplo < 0 || dumplo >= sc->sc_info.part[part].nblocks)
- return (EINVAL);
- if (dumplo + ctod(pages) > sc->sc_info.part[part].nblocks)
- pages = dtoc(sc->sc_info.part[part].nblocks - dumplo);
- maddr = lowram;
- baddr = dumplo + sc->sc_info.part[part].strtblk;
- /* scsi bus idle? */
- if (!scsireq(&sc->sc_dq)) {
- scsireset(hp->hp_ctlr);
- sdreset(sc, sc->sc_hd);
- printf("[ drive %d reset ] ", unit);
- }
- for (i = 0; i < pages; i++) {
- #define NPGMB (1024*1024/NBPG)
- /* print out how many Mbs we have dumped */
- if (i && (i % NPGMB) == 0)
- printf("%d ", i / NPGMB);
- #undef NPBMG
- pmap_enter(pmap_kernel(), vmmap, maddr, VM_PROT_READ, TRUE);
- stat = scsi_tt_write(hp->hp_ctlr, hp->hp_slave, sc->sc_punit,
- vmmap, NBPG, baddr, sc->sc_bshift);
- if (stat) {
- printf("sddump: scsi write error 0x%x\n", stat);
- return (EIO);
- }
- maddr += NBPG;
- baddr += ctod(1);
- }
- return (0);
- }
- #endif
-