/* $OpenBSD: sd.c,v 1.23 2001/08/26 00:15:37 miod Exp $ */ /* $NetBSD: sd.c,v 1.34 1997/07/10 18:14:10 kleink Exp $ */ /* * Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved. * Copyright (c) 1990, 1993 * 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 8.5 (Berkeley) 5/19/94 */ /* * SCSI CCS (Command Command Set) disk driver. */ #include #include #include #include #include #include #include #include #include #include #include #include /* for BBSIZE and SBSIZE */ #include #include #include #ifdef USELEDS #include #endif /* extern void disksort(); extern void biodone(); extern int physio(); extern void TBIS(); */ int sdmatch __P((struct device *, void *, void *)); void sdattach __P((struct device *, struct device *, void *)); struct cfattach sd_ca = { sizeof(struct sd_softc), sdmatch, sdattach }; struct cfdriver sd_cd = { NULL, "sd", DV_DISK }; #ifdef DEBUG int sddebug = 1; #define SDB_ERROR 0x01 #define SDB_PARTIAL 0x02 #define SDB_CAPACITY 0x04 #endif static struct scsi_fmt_cdb sd_read_cmd = { 10, { CMD_READ_EXT } }; static struct scsi_fmt_cdb sd_write_cmd = { 10, { CMD_WRITE_EXT } }; /* * 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, }; /* bdev_decl(sd); */ /* cdev_decl(sd); */ /* XXX we should use macros to do these... */ int sdopen __P((dev_t, int, int, struct proc *)); int sdclose __P((dev_t, int, int, struct proc *)); int sdioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); int sdread __P((dev_t, struct uio *, int)); void sdreset __P((struct sd_softc *)); int sdwrite __P((dev_t, struct uio *, int)); void sdstrategy __P((struct buf *)); int sddump __P((dev_t, daddr_t, caddr_t, size_t)); int sdsize __P((dev_t)); static void sdgetgeom __P((struct sd_softc *)); static void sdlblkstrat __P((struct buf *, int)); static int sderror __P((struct sd_softc *, int)); static void sdfinish __P((struct sd_softc *, struct buf *)); /* * Perform a mode-sense on page 0x04 (rigid geometry). */ static void sdgetgeom(sc) struct sd_softc *sc; { struct scsi_mode_sense_geom { struct scsi_modesense_hdr header; struct scsi_geometry geom; } sensebuf; struct scsi_fmt_cdb modesense_geom; int ctlr, slave, unit; /* XXX - if we try to do this in the declaration gcc uses memset() */ bzero(&modesense_geom, sizeof(modesense_geom)); modesense_geom.len = 6; modesense_geom.cdb[0] = CMD_MODE_SENSE; modesense_geom.cdb[2] = 0x04; modesense_geom.cdb[4] = sizeof(sensebuf); ctlr = sc->sc_dev.dv_parent->dv_unit; slave = sc->sc_target; unit = sc->sc_lun; scsi_delay(-1); /* XXX */ (void)scsi_immed_command(ctlr, slave, unit, &modesense_geom, (u_char *)&sensebuf, sizeof(sensebuf), B_READ); scsi_delay(0); /* XXX */ sc->sc_heads = sensebuf.geom.heads; sc->sc_cyls = (sensebuf.geom.cyl_ub << 16) | (sensebuf.geom.cyl_mb << 8) | sensebuf.geom.cyl_lb; } int sdmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct oscsi_attach_args *osa = aux; switch (osa->osa_inqbuf->type) { case 0: /* disk */ case 4: /* WORM */ case 5: /* CD-ROM */ case 7: /* Magneto-optical */ break; default: /* not a disk */ return 0; } return (1); } void sdattach(parent, self, aux) struct device *parent, *self; void *aux; { struct sd_softc *sc = (struct sd_softc *)self; struct oscsi_attach_args *osa = aux; /* * XXX formerly 0 meant unused but now pid 0 can legitimately * use this interface (sdgetcapacity). */ sc->sc_format_pid = -1; sc->sc_flags = 0; sc->sc_target = osa->osa_target; sc->sc_lun = osa->osa_lun; sc->sc_type = osa->osa_inqbuf->type; if (osa->osa_inqbuf->qual & 0x80) sc->sc_flags |= SDF_RMEDIA; printf("\n"); /* Initialize the 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 = sdstart; sc->sc_sq.sq_go = sdgo; sc->sc_sq.sq_intr = sdintr; if (sdgetcapacity(sc, NODEV) < 0) { printf("%s: getcapacity failed!\n", sc->sc_dev.dv_xname); return; } /* * Print out some additional information. */ printf("%s: ", sc->sc_dev.dv_xname); switch (sc->sc_type) { case 4: printf("WORM, "); break; case 5: printf("CD-ROM, "); break; case 7: printf("Magneto-optical, "); break; default: printf("%d cylinders, %d heads, ", sc->sc_cyls, sc->sc_heads); } if (sc->sc_blks) printf("%d blocks, %d bytes/block\n", sc->sc_blks >> sc->sc_bshift, sc->sc_blksize); else printf("drive empty\n"); /* Initialize the disk structure. */ sc->sc_dkdev.dk_name = sc->sc_dev.dv_xname; /* Attach the disk. */ disk_attach(&sc->sc_dkdev); dk_establish(&sc->sc_dkdev, &sc->sc_dev); /* XXX */ sc->sc_flags |= SDF_ALIVE; } void sdreset(sc) struct sd_softc *sc; { sc->sc_stats.sdresets++; } /* * Determine capacity of a drive. * Returns -1 on a failure, 0 on success, 1 on a failure that is probably * due to missing media. */ int sdgetcapacity(sc, dev) struct sd_softc *sc; dev_t dev; { static struct scsi_fmt_cdb cap = { 10, { CMD_READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; u_char *capbuf; int i, capbufsize; /* * Cannot use stack space for this buffer since stack KVA may not * be valid (i.e. in context of this process) when the operation * actually starts. */ capbufsize = 8; capbuf = malloc(capbufsize, M_DEVBUF, M_WAITOK); if (dev == NODEV) { scsi_delay(-1); /* XXX */ i = scsi_immed_command(sc->sc_dev.dv_parent->dv_unit, sc->sc_target, sc->sc_lun, &cap, capbuf, capbufsize, B_READ); scsi_delay(0); /* XXX */ } else { struct buf *bp; /* * XXX this is horrible */ if (sc->sc_format_pid >= 0) panic("sdgetcapacity"); bp = malloc(sizeof *bp, M_DEVBUF, M_WAITOK); sc->sc_format_pid = curproc->p_pid; bcopy(&cap, &sc->sc_cmdstore, sizeof cap); bp->b_dev = dev; bp->b_flags = B_READ | B_BUSY; bp->b_un.b_addr = (caddr_t)capbuf; bp->b_bcount = capbufsize; LIST_INIT(&bp->b_dep); sdstrategy(bp); i = biowait(bp) ? sc->sc_sensestore.status : 0; free(bp, M_DEVBUF); sc->sc_format_pid = -1; } if (i) { if (i != STS_CHECKCOND || (sc->sc_flags & SDF_RMEDIA) == 0) { #ifdef DEBUG if (sddebug & SDB_CAPACITY) printf("%s: read_capacity returns %d\n", sc->sc_dev.dv_xname, i); #endif free(capbuf, M_DEVBUF); return (-1); } /* * XXX assume unformatted or non-existant media */ sc->sc_blks = 0; sc->sc_blksize = DEV_BSIZE; sc->sc_bshift = 0; #ifdef DEBUG if (sddebug & SDB_CAPACITY) printf("%s: removable media not present\n", sc->sc_dev.dv_xname); #endif free(capbuf, M_DEVBUF); return (1); } sc->sc_blks = *(u_int *)&capbuf[0]; sc->sc_blksize = *(int *)&capbuf[4]; free(capbuf, M_DEVBUF); sc->sc_bshift = 0; /* return value of read capacity is last valid block number */ sc->sc_blks++; if (sc->sc_blksize != DEV_BSIZE) { if (sc->sc_blksize < DEV_BSIZE) { printf("%s: need at least %d byte blocks - %s\n", sc->sc_dev.dv_xname, DEV_BSIZE, "drive ignored"); return (-1); } for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1) ++sc->sc_bshift; sc->sc_blks <<= sc->sc_bshift; } #ifdef DEBUG if (sddebug & SDB_CAPACITY) printf("%s: blks=%d, blksize=%d, bshift=%d\n", sc->sc_dev.dv_xname, sc->sc_blks, sc->sc_blksize, sc->sc_bshift); #endif sc->sc_heads = sc->sc_cyls = 0; sdgetgeom(sc); return (0); } /* * Read or constuct a disklabel */ int sdgetinfo(dev, sc, lp, spoofonly) dev_t dev; struct sd_softc *sc; struct disklabel *lp; int spoofonly; { char *errstring; bzero((caddr_t)lp, sizeof *lp); errstring = NULL; /* * If removable media or the size unavailable at boot time * (i.e. unformatted hard disk), attempt to set the capacity * now. */ if ((sc->sc_flags & SDF_RMEDIA) || sc->sc_blks == 0) { switch (sdgetcapacity(sc, dev)) { case 0: break; case -1: /* * Hard error, just return (open will fail). */ return (EIO); case 1: /* * XXX return 0 so open can continue just in case * the media is unformatted and we want to format it. * We set the error flag so they cannot do much else. */ sc->sc_flags |= SDF_ERROR; /* XXX set magic here or it will never be set */ lp->d_magic = DISKMAGIC; lp->d_magic2 = DISKMAGIC; errstring = "unformatted/missing media"; break; } } /* * Create a default disk label based on scsi info. * This will get overridden if there is a real label on the disk. */ if (errstring == NULL) { /* XXX we can open a device even without SDF_ALIVE */ if (sc->sc_blksize == 0) sc->sc_blksize = DEV_BSIZE; /* Fill in info from disk geometry if it exists. */ lp->d_secperunit = sc->sc_blks >> sc->sc_bshift; if (lp->d_secperunit > 0 && sc->sc_heads > 0 && sc->sc_cyls > 0) { lp->d_ntracks = sc->sc_heads; lp->d_ncylinders = sc->sc_cyls; lp->d_nsectors = lp->d_secperunit / (lp->d_ntracks * lp->d_ncylinders); /* * We must make sure d_nsectors is a sane value. * Adjust d_ncylinders to be reasonable if we * monkey with d_nsectors. */ if (lp->d_nsectors < 1) { lp->d_nsectors = 32; lp->d_ncylinders = lp->d_secperunit / ( lp->d_ntracks * lp->d_nsectors); if (lp->d_ncylinders == 0) lp->d_ncylinders = sc->sc_cyls; } } else { lp->d_ntracks = 20; lp->d_ncylinders = 1; lp->d_nsectors = 32; } switch (sc->sc_type) { case 4: strcpy(lp->d_typename, "SCSI WORM"); break; case 5: strcpy(lp->d_typename, "SCSI CD-ROM"); break; case 7: strcpy(lp->d_typename, "SCSI optical"); break; default: strcpy(lp->d_typename, "SCSI disk"); break; } lp->d_type = DTYPE_SCSI; strcpy(lp->d_packname, "fictitious"); lp->d_secsize = sc->sc_blksize; lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; lp->d_rpm = 3600; lp->d_interleave = 1; /* XXX - these values for BBSIZE and SBSIZE assume ffs */ lp->d_bbsize = BBSIZE; lp->d_sbsize = SBSIZE; lp->d_partitions[RAW_PART].p_offset = 0; if (lp->d_secperunit > 0) lp->d_partitions[RAW_PART].p_size = lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); else lp->d_partitions[RAW_PART].p_size = roundup(LABELSECTOR+1, btodb(sc->sc_blksize)); lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; lp->d_npartitions = RAW_PART + 1; lp->d_magic = DISKMAGIC; lp->d_magic2 = DISKMAGIC; lp->d_checksum = dkcksum(lp); errstring = readdisklabel(sdlabdev(dev), sdstrategy, lp, NULL, spoofonly); } if (errstring) { printf("%s: WARNING: %s, defining `c' partition as entire disk\n", sc->sc_dev.dv_xname, errstring); /* XXX reset partition info as readdisklabel screws with it */ lp->d_partitions[0].p_size = 0; lp->d_partitions[RAW_PART].p_offset = 0; lp->d_partitions[RAW_PART].p_size = lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; lp->d_npartitions = RAW_PART + 1; lp->d_checksum = dkcksum(lp); } return(0); } int sdopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { int unit = sdunit(dev); struct sd_softc *sc; int error, mask, part; if (unit >= sd_cd.cd_ndevs || (sc = sd_cd.cd_devs[unit]) == NULL || (sc->sc_flags & SDF_ALIVE) == 0) return (ENXIO); /* * Wait for any pending opens/closes to complete */ while (sc->sc_flags & (SDF_OPENING|SDF_CLOSING)) sleep((caddr_t)sc, PRIBIO); /* * On first open, get label and partition info. * We may block reading the label, so be careful * to stop any other opens. */ if (sc->sc_dkdev.dk_openmask == 0) { sc->sc_flags |= SDF_OPENING; error = sdgetinfo(dev, sc, sc->sc_dkdev.dk_label, 0); sc->sc_flags &= ~SDF_OPENING; wakeup((caddr_t)sc); if (error) return(error); } part = sdpart(dev); mask = 1 << part; /* Check that the partition exists. */ if (part != RAW_PART && (part >= sc->sc_dkdev.dk_label->d_npartitions || sc->sc_dkdev.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) return (ENXIO); /* Ensure only one open at a time. */ switch (mode) { case S_IFCHR: sc->sc_dkdev.dk_copenmask |= mask; break; case S_IFBLK: sc->sc_dkdev.dk_bopenmask |= mask; break; } sc->sc_dkdev.dk_openmask = sc->sc_dkdev.dk_copenmask | sc->sc_dkdev.dk_bopenmask; return(0); } int sdclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = sdunit(dev); struct sd_softc *sc = sd_cd.cd_devs[unit]; struct disk *dk = &sc->sc_dkdev; int mask, s; mask = 1 << sdpart(dev); if (mode == S_IFCHR) dk->dk_copenmask &= ~mask; else dk->dk_bopenmask &= ~mask; dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask; /* * On last close, we wait for all activity to cease since * the label/parition info will become invalid. Since we * might sleep, we must block any opens while we are here. * Note we don't have to about other closes since we know * we are the last one. */ if (dk->dk_openmask == 0) { sc->sc_flags |= SDF_CLOSING; s = splbio(); while (sc->sc_tab.b_active) { sc->sc_flags |= SDF_WANTED; sleep((caddr_t)&sc->sc_tab, PRIBIO); } splx(s); sc->sc_flags &= ~(SDF_CLOSING|SDF_ERROR); wakeup((caddr_t)sc); } sc->sc_format_pid = -1; 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) struct buf *bp; int bsize; { struct sd_softc *sc = sd_cd.cd_devs[sdunit(bp->b_dev)]; struct buf *cbp = (struct buf *)malloc(sizeof(struct buf), M_DEVBUF, M_WAITOK); caddr_t cbuf = (caddr_t)malloc(bsize, M_DEVBUF, M_WAITOK); int bn, resid; caddr_t addr; bzero((caddr_t)cbp, sizeof(*cbp)); cbp->b_proc = curproc; /* XXX */ cbp->b_dev = bp->b_dev; LIST_INIT(&cbp->b_dep); bn = bp->b_blkno; resid = bp->b_bcount; addr = bp->b_un.b_addr; #ifdef DEBUG if (sddebug & SDB_PARTIAL) printf("sdlblkstrat: bp %p flags %lx bn %x resid %x addr %p\n", bp, bp->b_flags, bn, resid, addr); #endif while (resid > 0) { int boff = dbtob(bn) & (bsize - 1); int count; if (boff || resid < bsize) { sc->sc_stats.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 %p\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 %p\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 %p\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 %p\n", bn, resid, addr); #endif } free(cbuf, M_DEVBUF); free(cbp, M_DEVBUF); } void sdstrategy(bp) struct buf *bp; { int unit = sdunit(bp->b_dev); struct sd_softc *sc = sd_cd.cd_devs[unit]; struct buf *dp = &sc->sc_tab; struct partition *pinfo; daddr_t bn; int sz, s; int offset; if (sc->sc_format_pid >= 0) { if (sc->sc_format_pid != curproc->p_pid) { /* XXX */ bp->b_error = EPERM; goto bad; } bp->b_cylin = 0; } else { if (sc->sc_flags & SDF_ERROR) { bp->b_error = EIO; goto bad; } bn = bp->b_blkno; sz = howmany(bp->b_bcount, DEV_BSIZE); pinfo = &sc->sc_dkdev.dk_label->d_partitions[sdpart(bp->b_dev)]; /* Don't perform partition translation on RAW_PART. */ offset = (sdpart(bp->b_dev) == RAW_PART) ? 0 : pinfo->p_offset; if (sdpart(bp->b_dev) != RAW_PART) { /* * XXX This block of code belongs in * XXX bounds_check_with_label() */ if (bn < 0 || bn + sz > pinfo->p_size) { sz = pinfo->p_size - bn; if (sz == 0) { bp->b_resid = bp->b_bcount; goto done; } if (sz < 0) { bp->b_error = EINVAL; goto bad; } bp->b_bcount = dbtob(sz); } /* * Check for write to write protected label */ if (bn + offset <= LABELSECTOR && #if LABELSECTOR != 0 bn + offset + sz > LABELSECTOR && #endif !(bp->b_flags & B_READ) && !(sc->sc_flags & SDF_WLABEL)) { bp->b_error = EROFS; goto bad; } } /* * 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 + offset) >> sc->sc_bshift; } s = splbio(); disksort(dp, bp); if (dp->b_active == 0) { dp->b_active = 1; sdustart(unit); } splx(s); return; bad: bp->b_flags |= B_ERROR; done: biodone(bp); } void sdustart(unit) int unit; { struct sd_softc *sc = sd_cd.cd_devs[unit]; if (scsireq(sc->sc_dev.dv_parent, &sc->sc_sq)) sdstart(sc); } /* * Return: * 0 if not really an error * <0 if we should do a retry * >0 if a fatal error */ static int sderror(sc, stat) struct sd_softc *sc; int stat; { int cond = 1; sc->sc_sensestore.status = stat; if (stat & STS_CHECKCOND) { struct scsi_xsense *sp; scsi_request_sense(sc->sc_dev.dv_parent->dv_unit, sc->sc_target, sc->sc_lun, sc->sc_sensestore.sense, sizeof(sc->sc_sensestore.sense)); sp = (struct scsi_xsense *)(sc->sc_sensestore.sense); printf("%s: scsi sense class %d, code %d", sc->sc_dev.dv_xname, 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; /* possible media change */ case 6: /* * For removable media, if we are doing the * first open (i.e. reading the label) go * ahead and retry, otherwise someone has * changed the media out from under us and * we should abort any further operations * until a close is done. */ if (sc->sc_flags & SDF_RMEDIA) { if (sc->sc_flags & SDF_OPENING) cond = -1; else sc->sc_flags |= SDF_ERROR; } break; } } printf("\n"); } return(cond); } static void sdfinish(sc, bp) struct sd_softc *sc; struct buf *bp; { struct buf *dp = &sc->sc_tab; dp->b_errcnt = 0; dp->b_actf = bp->b_actf; bp->b_resid = 0; biodone(bp); scsifree(sc->sc_dev.dv_parent, &sc->sc_sq); if (dp->b_actf) sdustart(sc->sc_dev.dv_unit); else { dp->b_active = 0; if (sc->sc_flags & SDF_WANTED) { sc->sc_flags &= ~SDF_WANTED; wakeup((caddr_t)dp); } } } void sdstart(arg) void *arg; { struct sd_softc *sc = arg; /* * we have the SCSI bus -- in format mode, we may or may not need dma * so check now. */ if (sc->sc_format_pid >= 0 && legal_cmds[sc->sc_cmdstore.cdb[0]] > 0) { struct buf *bp = sc->sc_tab.b_actf; int sts; sc->sc_tab.b_errcnt = 0; while (1) { sts = scsi_immed_command(sc->sc_dev.dv_parent->dv_unit, sc->sc_target, sc->sc_lun, &sc->sc_cmdstore, bp->b_un.b_addr, bp->b_bcount, bp->b_flags & B_READ); sc->sc_sensestore.status = sts; if ((sts & 0xfe) == 0 || (sts = sderror(sc, sts)) == 0) break; if (sts > 0 || sc->sc_tab.b_errcnt++ >= SDRETRY) { bp->b_flags |= B_ERROR; bp->b_error = EIO; break; } } sdfinish(sc, bp); } else if (scsiustart(sc->sc_dev.dv_parent->dv_unit)) sdgo(sc); } void sdgo(arg) void *arg; { struct sd_softc *sc = arg; struct buf *bp = sc->sc_tab.b_actf; int pad; struct scsi_fmt_cdb *cmd; if (sc->sc_format_pid >= 0) { cmd = &sc->sc_cmdstore; pad = 0; } else { /* * Drive is in an error state, abort all operations */ if (sc->sc_flags & SDF_ERROR) { bp->b_flags |= B_ERROR; bp->b_error = EIO; sdfinish(sc, bp); return; } 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("%s: partial block xfer -- %lx bytes\n", sc->sc_dev.dv_xname, bp->b_bcount); #endif sc->sc_stats.sdtransfers++; } #ifdef USELEDS ledcontrol(0, 0, LED_DISK); #endif if (scsigo(sc->sc_dev.dv_parent->dv_unit, sc->sc_target, sc->sc_lun, bp, cmd, pad) == 0) { /* Instrumentation. */ disk_busy(&sc->sc_dkdev); sc->sc_dkdev.dk_seek++; /* XXX */ return; } #ifdef DEBUG if (sddebug & SDB_ERROR) printf("%s: sdstart: %s adr %p blk %ld len %ld ecnt %ld\n", sc->sc_dev.dv_xname, bp->b_flags & B_READ? "read" : "write", bp->b_un.b_addr, bp->b_cylin, bp->b_bcount, sc->sc_tab.b_errcnt); #endif bp->b_flags |= B_ERROR; bp->b_error = EIO; sdfinish(sc, bp); } void sdintr(arg, stat) void *arg; int stat; { struct sd_softc *sc = arg; struct buf *bp = sc->sc_tab.b_actf; int cond; if (bp == NULL) { printf("%s: bp == NULL\n", sc->sc_dev.dv_xname); return; } disk_unbusy(&sc->sc_dkdev, (bp->b_bcount - bp->b_resid)); if (stat) { #ifdef DEBUG if (sddebug & SDB_ERROR) printf("%s: sdintr: bad scsi status 0x%x\n", sc->sc_dev.dv_xname, stat); #endif cond = sderror(sc, stat); if (cond) { if (cond < 0 && sc->sc_tab.b_errcnt++ < SDRETRY) { #ifdef DEBUG if (sddebug & SDB_ERROR) printf("%s: retry #%ld\n", sc->sc_dev.dv_xname, sc->sc_tab.b_errcnt); #endif sdstart(sc); return; } bp->b_flags |= B_ERROR; bp->b_error = EIO; } } sdfinish(sc, bp); } int sdread(dev, uio, flags) dev_t dev; struct uio *uio; int flags; { int unit = sdunit(dev); struct sd_softc *sc = sd_cd.cd_devs[unit]; int pid; if ((pid = sc->sc_format_pid) >= 0 && 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; { int unit = sdunit(dev); struct sd_softc *sc = sd_cd.cd_devs[unit]; int pid; if ((pid = sc->sc_format_pid) >= 0 && 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; u_long cmd; caddr_t data; int flag; struct proc *p; { int unit = sdunit(dev); struct sd_softc *sc = sd_cd.cd_devs[unit]; struct disklabel *lp = sc->sc_dkdev.dk_label; int error, flags; switch (cmd) { case DIOCGPDINFO: error = sdgetinfo(dev, sc, (struct disklabel *)data, 1); return (error); case DIOCGDINFO: *(struct disklabel *)data = *lp; return (0); case DIOCGPART: ((struct partinfo *)data)->disklab = lp; ((struct partinfo *)data)->part = &lp->d_partitions[sdpart(dev)]; return (0); case DIOCWLABEL: if ((flag & FWRITE) == 0) return (EBADF); if (*(int *)data) sc->sc_flags |= SDF_WLABEL; else sc->sc_flags &= ~SDF_WLABEL; return (0); case DIOCSDINFO: if ((flag & FWRITE) == 0) return (EBADF); error = setdisklabel(lp, (struct disklabel *)data, (sc->sc_flags & SDF_WLABEL) ? 0 : sc->sc_dkdev.dk_openmask, (struct cpu_disklabel *)0); return (error); case DIOCWDINFO: if ((flag & FWRITE) == 0) return (EBADF); error = setdisklabel(lp, (struct disklabel *)data, (sc->sc_flags & SDF_WLABEL) ? 0 : sc->sc_dkdev.dk_openmask, (struct cpu_disklabel *)0); if (error) return (error); flags = sc->sc_flags; sc->sc_flags = SDF_ALIVE | SDF_WLABEL; error = writedisklabel(sdlabdev(dev), sdstrategy, lp, (struct cpu_disklabel *)0); sc->sc_flags = flags; return (error); 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 >= 0) return (EPERM); sc->sc_format_pid = p->p_pid; } else sc->sc_format_pid = -1; 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, &sc->sc_cmdstore, sizeof(struct scsi_fmt_cdb)); return (0); case SDIOCSENSE: /* * return the SCSI sense data saved after the last * operation that completed with "check condition" status. */ bcopy(&sc->sc_sensestore, data, sizeof(sc->sc_sensestore)); return (0); default: return (EINVAL); } /*NOTREACHED*/ } int sdsize(dev) dev_t dev; { int unit = sdunit(dev); struct sd_softc *sc = sd_cd.cd_devs[unit]; int psize, didopen = 0; if (unit >= sd_cd.cd_ndevs || (sc = sd_cd.cd_devs[unit]) == NULL || (sc->sc_flags & SDF_ALIVE) == 0) return (-1); /* * We get called very early on (via swapconf) * without the device being open so we may need * to handle it here. */ if (sc->sc_dkdev.dk_openmask == 0) { if (sdopen(dev, FREAD|FWRITE, S_IFBLK, NULL)) return(-1); didopen = 1; } psize = sc->sc_dkdev.dk_label->d_partitions[sdpart(dev)].p_size * (sc->sc_dkdev.dk_label->d_secsize / DEV_BSIZE); if (didopen) (void) sdclose(dev, FREAD|FWRITE, S_IFBLK, NULL); return (psize); } static int sddoingadump; /* simple mutex */ /* * Non-interrupt driven, non-dma dump routine. */ int sddump(dev, blkno, va, size) dev_t dev; daddr_t blkno; caddr_t va; size_t size; { int sectorsize; /* size of a disk sector */ int nsects; /* number of sectors in partition */ int sectoff; /* sector offset of partition */ int totwrt; /* total number of sectors left to write */ int nwrt; /* current number of sectors to write */ int unit, part; struct sd_softc *sc; struct disklabel *lp; char stat; /* Check for recursive dump; if so, punt. */ if (sddoingadump) return (EFAULT); sddoingadump = 1; /* Decompose unit and partition. */ unit = sdunit(dev); part = sdpart(dev); /* Make sure device is ok. */ if (unit >= sd_cd.cd_ndevs || (sc = sd_cd.cd_devs[unit]) == NULL || (sc->sc_flags & SDF_ALIVE) == 0) return (ENXIO); /* * Convert to disk sectors. Request must be a multiple of size. */ lp = sc->sc_dkdev.dk_label; sectorsize = lp->d_secsize; if ((size % sectorsize) != 0) return (EFAULT); totwrt = size / sectorsize; blkno = dbtob(blkno) / sectorsize; /* blkno in DEV_BSIZE units */ nsects = lp->d_partitions[part].p_size; sectoff = lp->d_partitions[part].p_offset; /* Check transfer bounds against partition size. */ if ((blkno < 0) || (blkno + totwrt) > nsects) return (EINVAL); /* Offset block number to start of partition. */ blkno += sectoff; while (totwrt > 0) { nwrt = totwrt; /* XXX */ #ifndef SD_DUMP_NOT_TRUSTED /* * Send the data. Note the `0' argument for bshift; * we've done the necessary conversion above. */ stat = scsi_tt_write(sc->sc_dev.dv_parent->dv_unit, sc->sc_target, sc->sc_lun, va, nwrt * sectorsize, blkno, 0); if (stat) { printf("\nsddump: scsi write error 0x%x\n", stat); return (EIO); } #else /* SD_DUMP_NOT_TRUSTED */ /* Lets just talk about it first. */ printf("%s: dump addr %p, blk %d\n", sc->sc_dev.dv_xname, va, blkno); delay(500 * 1000); /* half a second */ #endif /* SD_DUMP_NOT_TRUSTED */ /* update block count */ totwrt -= nwrt; blkno += nwrt; va += sectorsize * nwrt; } sddoingadump = 0; return (0); }