Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/scsi/sd.c

1104 lines
28 KiB
C
Raw Blame History

/* $NetBSD: sd.c,v 1.88 1996/03/05 00:15:15 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995 Charles M. 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 M. 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.
*/
/*
* Originally written by Julian Elischer (julian@dialix.oz.au)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* Ported to run under 386BSD by Julian Elischer (julian@dialix.oz.au) Sept 1992
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/proc.h>
#include <sys/cpu.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#include <scsi/scsi_conf.h>
#define SDOUTSTANDING 2
#define SDRETRIES 4
#define SDUNIT(dev) DISKUNIT(dev)
#define SDPART(dev) DISKPART(dev)
#define MAKESDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part)
#define SDLABELDEV(dev) (MAKESDDEV(major(dev), SDUNIT(dev), RAW_PART))
struct sd_softc {
struct device sc_dev;
struct disk sc_dk;
int flags;
#define SDF_LOCKED 0x01
#define SDF_WANTED 0x02
#define SDF_WLABEL 0x04 /* label is writable */
#define SDF_LABELLING 0x08 /* writing label */
#define SDF_ANCIENT 0x10 /* disk is ancient; for minphys */
struct scsi_link *sc_link; /* contains our targ, lun, etc. */
struct disk_parms {
u_char heads; /* number of heads */
u_short cyls; /* number of cylinders */
u_char sectors; /* number of sectors/track */
int blksize; /* number of bytes/sector */
u_long disksize; /* total number sectors */
} params;
struct buf buf_queue;
};
int sdmatch __P((struct device *, void *, void *));
void sdattach __P((struct device *, struct device *, void *));
int sdlock __P((struct sd_softc *));
void sdunlock __P((struct sd_softc *));
void sdminphys __P((struct buf *));
void sdgetdisklabel __P((struct sd_softc *));
void sdstart __P((void *));
int sddone __P((struct scsi_xfer *, int));
u_long sd_size __P((struct sd_softc *, int));
int sd_reassign_blocks __P((struct sd_softc *, u_long));
int sd_get_parms __P((struct sd_softc *, int));
struct cfdriver sdcd = {
NULL, "sd", sdmatch, sdattach, DV_DISK, sizeof(struct sd_softc)
};
struct dkdriver sddkdriver = { sdstrategy };
struct scsi_device sd_switch = {
NULL, /* Use default error handler */
sdstart, /* have a queue, served by this */
NULL, /* have no async handler */
sddone, /* deal with stats at interrupt time */
};
struct scsi_inquiry_pattern sd_patterns[] = {
{T_DIRECT, T_FIXED,
"", "", ""},
{T_DIRECT, T_REMOV,
"", "", ""},
{T_OPTICAL, T_FIXED,
"", "", ""},
{T_OPTICAL, T_REMOV,
"", "", ""},
};
int
sdmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct scsibus_attach_args *sa = aux;
int priority;
(void)scsi_inqmatch(sa->sa_inqbuf,
(caddr_t)sd_patterns, sizeof(sd_patterns)/sizeof(sd_patterns[0]),
sizeof(sd_patterns[0]), &priority);
return (priority);
}
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
void
sdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct sd_softc *sd = (void *)self;
struct disk_parms *dp = &sd->params;
struct scsibus_attach_args *sa = aux;
struct scsi_link *sc_link = sa->sa_sc_link;
SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: "));
/*
* Store information needed to contact our base driver
*/
sd->sc_link = sc_link;
sc_link->device = &sd_switch;
sc_link->device_softc = sd;
if (sc_link->openings > SDOUTSTANDING)
sc_link->openings = SDOUTSTANDING;
/*
* Initialize and attach the disk structure.
*/
sd->sc_dk.dk_driver = &sddkdriver;
sd->sc_dk.dk_name = sd->sc_dev.dv_xname;
disk_attach(&sd->sc_dk);
sd->sc_dk.dk_driver = &sddkdriver;
#if !defined(i386) || defined(NEWCONFIG)
dk_establish(&sd->sc_dk, &sd->sc_dev); /* XXX */
#endif
/*
* Note if this device is ancient. This is used in sdminphys().
*/
if ((sa->sa_inqbuf->version & SID_ANSII) == 0)
sd->flags |= SDF_ANCIENT;
/*
* Use the subdriver to request information regarding
* the drive. We cannot use interrupts yet, so the
* request must specify this.
*/
printf("\n");
printf("%s: ", sd->sc_dev.dv_xname);
if (scsi_start(sd->sc_link, SSS_START,
SCSI_AUTOCONF | SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT) ||
sd_get_parms(sd, SCSI_AUTOCONF) != 0)
printf("drive offline\n");
else
printf("%dMB, %d cyl, %d head, %d sec, %d bytes/sec\n",
dp->disksize / (1048576 / dp->blksize), dp->cyls,
dp->heads, dp->sectors, dp->blksize);
}
/*
* Wait interruptibly for an exclusive lock.
*
* XXX
* Several drivers do this; it should be abstracted and made MP-safe.
*/
int
sdlock(sd)
struct sd_softc *sd;
{
int error;
while ((sd->flags & SDF_LOCKED) != 0) {
sd->flags |= SDF_WANTED;
if ((error = tsleep(sd, PRIBIO | PCATCH, "sdlck", 0)) != 0)
return error;
}
sd->flags |= SDF_LOCKED;
return 0;
}
/*
* Unlock and wake up any waiters.
*/
void
sdunlock(sd)
struct sd_softc *sd;
{
sd->flags &= ~SDF_LOCKED;
if ((sd->flags & SDF_WANTED) != 0) {
sd->flags &= ~SDF_WANTED;
wakeup(sd);
}
}
/*
* open the device. Make sure the partition info is a up-to-date as can be.
*/
int
sdopen(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct sd_softc *sd;
struct scsi_link *sc_link;
int unit, part;
int error;
unit = SDUNIT(dev);
if (unit >= sdcd.cd_ndevs)
return ENXIO;
sd = sdcd.cd_devs[unit];
if (!sd)
return ENXIO;
sc_link = sd->sc_link;
SC_DEBUG(sc_link, SDEV_DB1,
("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit,
sdcd.cd_ndevs, part));
if ((error = sdlock(sd)) != 0)
return error;
if (sd->sc_dk.dk_openmask != 0) {
/*
* If any partition is open, but the disk has been invalidated,
* disallow further opens.
*/
if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
error = EIO;
goto bad3;
}
} else {
/* Check that it is still responding and ok. */
error = scsi_test_unit_ready(sc_link,
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_MEDIA_CHANGE |
SCSI_IGNORE_NOT_READY);
if (error)
goto bad3;
/* Start the pack spinning if necessary. */
error = scsi_start(sc_link, SSS_START,
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT);
if (error)
goto bad3;
sc_link->flags |= SDEV_OPEN;
/* Lock the pack in. */
error = scsi_prevent(sc_link, PR_PREVENT,
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_MEDIA_CHANGE);
if (error)
goto bad;
if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
sc_link->flags |= SDEV_MEDIA_LOADED;
/* Load the physical device parameters. */
if (sd_get_parms(sd, 0) != 0) {
error = ENXIO;
goto bad2;
}
SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded "));
/* Load the partition info if not already loaded. */
sdgetdisklabel(sd);
SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded "));
}
}
part = SDPART(dev);
/* Check that the partition exists. */
if (part != RAW_PART &&
(part >= sd->sc_dk.dk_label->d_npartitions ||
sd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) {
error = ENXIO;
goto bad;
}
/* Insure only one open at a time. */
switch (fmt) {
case S_IFCHR:
sd->sc_dk.dk_copenmask |= (1 << part);
break;
case S_IFBLK:
sd->sc_dk.dk_bopenmask |= (1 << part);
break;
}
sd->sc_dk.dk_openmask = sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask;
SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n"));
sdunlock(sd);
return 0;
bad2:
sc_link->flags &= ~SDEV_MEDIA_LOADED;
bad:
if (sd->sc_dk.dk_openmask == 0) {
scsi_prevent(sc_link, PR_ALLOW,
SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE);
sc_link->flags &= ~SDEV_OPEN;
}
bad3:
sdunlock(sd);
return error;
}
/*
* close the device.. only called if we are the LAST occurence of an open
* device. Convenient now but usually a pain.
*/
int
sdclose(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct sd_softc *sd = sdcd.cd_devs[SDUNIT(dev)];
int part = SDPART(dev);
int error;
if ((error = sdlock(sd)) != 0)
return error;
switch (fmt) {
case S_IFCHR:
sd->sc_dk.dk_copenmask &= ~(1 << part);
break;
case S_IFBLK:
sd->sc_dk.dk_bopenmask &= ~(1 << part);
break;
}
sd->sc_dk.dk_openmask = sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask;
if (sd->sc_dk.dk_openmask == 0) {
/* XXXX Must wait for I/O to complete! */
scsi_prevent(sd->sc_link, PR_ALLOW,
SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY);
sd->sc_link->flags &= ~SDEV_OPEN;
}
sdunlock(sd);
return 0;
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
void
sdstrategy(bp)
struct buf *bp;
{
struct sd_softc *sd = sdcd.cd_devs[SDUNIT(bp->b_dev)];
int s;
SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdstrategy "));
SC_DEBUG(sd->sc_link, SDEV_DB1,
("%d bytes @ blk %d\n", bp->b_bcount, bp->b_blkno));
/*
* The transfer must be a whole number of blocks.
*/
if ((bp->b_bcount % sd->sc_dk.dk_label->d_secsize) != 0) {
bp->b_error = EINVAL;
goto bad;
}
/*
* If the device has been made invalid, error out
*/
if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
bp->b_error = EIO;
goto bad;
}
/*
* If it's a null transfer, return immediatly
*/
if (bp->b_bcount == 0)
goto done;
/*
* Do bounds checking, adjust transfer. if error, process.
* If end of partition, just return.
*/
if (SDPART(bp->b_dev) != RAW_PART &&
bounds_check_with_label(bp, sd->sc_dk.dk_label,
(sd->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0)
goto done;
s = splbio();
/*
* Place it in the queue of disk activities for this disk
*/
disksort(&sd->buf_queue, bp);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
*/
sdstart(sd);
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
/*
* Correctly set the buf to indicate a completed xfer
*/
bp->b_resid = bp->b_bcount;
biodone(bp);
}
/*
* sdstart looks to see if there is a buf waiting for the device
* and that the device is not already busy. If both are true,
* It dequeues the buf and creates a scsi command to perform the
* transfer in the buf. The transfer request will call scsi_done
* on completion, which will in turn call this routine again
* so that the next queued transfer is performed.
* The bufs are queued by the strategy routine (sdstrategy)
*
* This routine is also called after other non-queued requests
* have been made of the scsi driver, to ensure that the queue
* continues to be drained.
*
* must be called at the correct (highish) spl level
* sdstart() is called at splbio from sdstrategy and scsi_done
*/
void
sdstart(v)
register void *v;
{
register struct sd_softc *sd = v;
register struct scsi_link *sc_link = sd->sc_link;
struct buf *bp = 0;
struct buf *dp;
struct scsi_rw_big cmd_big;
struct scsi_rw cmd_small;
struct scsi_generic *cmdp;
int blkno, nblks, cmdlen;
struct partition *p;
SC_DEBUG(sc_link, SDEV_DB2, ("sdstart "));
/*
* Check if the device has room for another command
*/
while (sc_link->openings > 0) {
/*
* there is excess capacity, but a special waits
* It'll need the adapter as soon as we clear out of the
* way and let it run (user level wait).
*/
if (sc_link->flags & SDEV_WAITING) {
sc_link->flags &= ~SDEV_WAITING;
wakeup((caddr_t)sc_link);
return;
}
/*
* See if there is a buf with work for us to do..
*/
dp = &sd->buf_queue;
if ((bp = dp->b_actf) == NULL) /* yes, an assign */
return;
dp->b_actf = bp->b_actf;
/*
* If the device has become invalid, abort all the
* reads and writes until all files have been closed and
* re-opened
*/
if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
biodone(bp);
continue;
}
/*
* We have a buf, now we should make a command
*
* First, translate the block to absolute and put it in terms
* of the logical blocksize of the device.
*/
blkno =
bp->b_blkno / (sd->sc_dk.dk_label->d_secsize / DEV_BSIZE);
if (SDPART(bp->b_dev) != RAW_PART) {
p = &sd->sc_dk.dk_label->d_partitions[SDPART(bp->b_dev)];
blkno += p->p_offset;
}
nblks = howmany(bp->b_bcount, sd->sc_dk.dk_label->d_secsize);
/*
* Fill out the scsi command. If the transfer will
* fit in a "small" cdb, use it.
*/
if (((blkno & 0x1fffff) == blkno) &&
((nblks & 0xff) == nblks)) {
/*
* We can fit in a small cdb.
*/
bzero(&cmd_small, sizeof(cmd_small));
cmd_small.opcode = (bp->b_flags & B_READ) ?
READ_COMMAND : WRITE_COMMAND;
cmd_small.addr_2 = (blkno >> 16) & 0x1f;
cmd_small.addr_1 = (blkno >> 8) & 0xff;
cmd_small.addr_0 = blkno & 0xff;
cmd_small.length = nblks & 0xff;
cmdlen = sizeof(cmd_small);
cmdp = (struct scsi_generic *)&cmd_small;
} else {
/*
* Need a large cdb.
*/
bzero(&cmd_big, sizeof(cmd_big));
cmd_big.opcode = (bp->b_flags & B_READ) ?
READ_BIG : WRITE_BIG;
cmd_big.addr_3 = (blkno >> 24) & 0xff;
cmd_big.addr_2 = (blkno >> 16) & 0xff;
cmd_big.addr_1 = (blkno >> 8) & 0xff;
cmd_big.addr_0 = blkno & 0xff;
cmd_big.length2 = (nblks >> 8) & 0xff;
cmd_big.length1 = nblks & 0xff;
cmdlen = sizeof(cmd_big);
cmdp = (struct scsi_generic *)&cmd_big;
}
/* Instrumentation. */
disk_busy(&sd->sc_dk);
/*
* Call the routine that chats with the adapter.
* Note: we cannot sleep as we may be an interrupt
*/
if (scsi_scsi_cmd(sc_link, cmdp, cmdlen,
(u_char *)bp->b_data, bp->b_bcount,
SDRETRIES, 10000, bp, SCSI_NOSLEEP |
((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT)))
printf("%s: not queued", sd->sc_dev.dv_xname);
}
}
int
sddone(xs, complete)
struct scsi_xfer *xs;
int complete;
{
struct sd_softc *sd = xs->sc_link->device_softc;
if (complete && (xs->bp != NULL))
disk_unbusy(&sd->sc_dk, (xs->bp->b_bcount - xs->bp->b_resid));
return (0);
}
void
sdminphys(bp)
struct buf *bp;
{
struct sd_softc *sd = sdcd.cd_devs[SDUNIT(bp->b_dev)];
long max;
/*
* If the device is ancient, we want to make sure that
* the transfer fits into a 6-byte cdb.
*
* XXX Note that the SCSI-I spec says that 256-block transfers
* are allowed in a 6-byte read/write, and are specified
* by settng the "length" to 0. However, we're conservative
* here, allowing only 255-block transfers in case an
* ancient device gets confused by length == 0. A length of 0
* in a 10-byte read/write actually means 0 blocks.
*/
if (sd->flags & SDF_ANCIENT) {
max = sd->sc_dk.dk_label->d_secsize * 0xff;
if (bp->b_bcount > max)
bp->b_bcount = max;
}
(*sd->sc_link->adapter->scsi_minphys)(bp);
}
int
sdread(dev, uio, ioflag)
dev_t dev;
struct uio *uio;
int ioflag;
{
return (physio(sdstrategy, NULL, dev, B_READ, sdminphys, uio));
}
int
sdwrite(dev, uio, ioflag)
dev_t dev;
struct uio *uio;
int ioflag;
{
return (physio(sdstrategy, NULL, dev, B_WRITE, sdminphys, uio));
}
/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
int
sdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
struct sd_softc *sd = sdcd.cd_devs[SDUNIT(dev)];
int error;
SC_DEBUG(sd->sc_link, SDEV_DB2, ("sdioctl 0x%lx ", cmd));
/*
* If the device is not valid.. abandon ship
*/
if ((sd->sc_link->flags & SDEV_MEDIA_LOADED) == 0)
return EIO;
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)addr = *(sd->sc_dk.dk_label);
return 0;
case DIOCGPART:
((struct partinfo *)addr)->disklab = sd->sc_dk.dk_label;
((struct partinfo *)addr)->part =
&sd->sc_dk.dk_label->d_partitions[SDPART(dev)];
return 0;
case DIOCWDINFO:
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
if ((error = sdlock(sd)) != 0)
return error;
sd->flags |= SDF_LABELLING;
error = setdisklabel(sd->sc_dk.dk_label,
(struct disklabel *)addr, /*sd->sc_dk.dk_openmask : */0,
sd->sc_dk.dk_cpulabel);
if (error == 0) {
if (cmd == DIOCWDINFO)
error = writedisklabel(SDLABELDEV(dev),
sdstrategy, sd->sc_dk.dk_label,
sd->sc_dk.dk_cpulabel);
}
sd->flags &= ~SDF_LABELLING;
sdunlock(sd);
return error;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
if (*(int *)addr)
sd->flags |= SDF_WLABEL;
else
sd->flags &= ~SDF_WLABEL;
return 0;
case DIOCLOCK:
return scsi_prevent(sd->sc_link,
(*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0);
case DIOCEJECT:
return ((sd->sc_link->flags & SDEV_REMOVABLE == 0) ? ENOTTY :
scsi_start(sd->sc_link, SSS_STOP|SSS_LOEJ, 0));
default:
if (SDPART(dev) != RAW_PART)
return ENOTTY;
return scsi_do_ioctl(sd->sc_link, dev, cmd, addr, flag, p);
}
#ifdef DIAGNOSTIC
panic("sdioctl: impossible");
#endif
}
/*
* Load the label information on the named device
*/
void
sdgetdisklabel(sd)
struct sd_softc *sd;
{
struct disklabel *lp = sd->sc_dk.dk_label;
char *errstring;
bzero(lp, sizeof(struct disklabel));
bzero(sd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel));
lp->d_secsize = sd->params.blksize;
lp->d_ntracks = sd->params.heads;
lp->d_nsectors = sd->params.sectors;
lp->d_ncylinders = sd->params.cyls;
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
if (lp->d_secpercyl == 0) {
lp->d_secpercyl = 100;
/* as long as it's not 0 - readdisklabel divides by it (?) */
}
strncpy(lp->d_typename, "SCSI disk", 16);
lp->d_type = DTYPE_SCSI;
strncpy(lp->d_packname, "fictitious", 16);
lp->d_secperunit = sd->params.disksize;
lp->d_rpm = 3600;
lp->d_interleave = 1;
lp->d_flags = 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_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
/*
* Call the generic disklabel extraction routine
*/
errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit, RAW_PART),
sdstrategy, lp, sd->sc_dk.dk_cpulabel);
if (errstring) {
printf("%s: %s\n", sd->sc_dev.dv_xname, errstring);
return;
}
}
/*
* Find out from the device what it's capacity is
*/
u_long
sd_size(sd, flags)
struct sd_softc *sd;
int flags;
{
struct scsi_read_cap_data rdcap;
struct scsi_read_capacity scsi_cmd;
u_long size;
/*
* make up a scsi command and ask the scsi driver to do
* it for you.
*/
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = READ_CAPACITY;
/*
* If the command works, interpret the result as a 4 byte
* number of blocks
*/
if (scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
sizeof(scsi_cmd), (u_char *)&rdcap, sizeof(rdcap), SDRETRIES,
2000, NULL, flags | SCSI_DATA_IN) != 0)
return 0;
size = (rdcap.addr_3 << 24) + (rdcap.addr_2 << 16) +
(rdcap.addr_1 << 8) + rdcap.addr_0 + 1;
return size;
}
/*
* Tell the device to map out a defective block
*/
int
sd_reassign_blocks(sd, block)
struct sd_softc *sd;
u_long block;
{
struct scsi_reassign_blocks scsi_cmd;
struct scsi_reassign_blocks_data rbdata;
bzero(&scsi_cmd, sizeof(scsi_cmd));
bzero(&rbdata, sizeof(rbdata));
scsi_cmd.opcode = REASSIGN_BLOCKS;
rbdata.length_msb = 0;
rbdata.length_lsb = sizeof(rbdata.defect_descriptor[0]);
rbdata.defect_descriptor[0].dlbaddr_3 = (block >> 24) & 0xff;
rbdata.defect_descriptor[0].dlbaddr_2 = (block >> 16) & 0xff;
rbdata.defect_descriptor[0].dlbaddr_1 = (block >> 8) & 0xff;
rbdata.defect_descriptor[0].dlbaddr_0 = block & 0xff;
return scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
sizeof(scsi_cmd), (u_char *)&rbdata, sizeof(rbdata), SDRETRIES,
5000, NULL, SCSI_DATA_OUT);
}
#define b2tol(a) (((unsigned)(a##_1) << 8) + (unsigned)a##_0 )
/*
* Get the scsi driver to send a full inquiry to the * device and use the
* results to fill out the disk parameter structure.
*/
int
sd_get_parms(sd, flags)
struct sd_softc *sd;
int flags;
{
struct disk_parms *dp = &sd->params;
struct scsi_mode_sense scsi_cmd;
struct scsi_mode_sense_data {
struct scsi_mode_header header;
struct scsi_blk_desc blk_desc;
union disk_pages pages;
} scsi_sense;
u_long sectors;
/*
* do a "mode sense page 4"
*/
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = MODE_SENSE;
scsi_cmd.page = 4;
scsi_cmd.length = 0x20;
/*
* If the command worked, use the results to fill out
* the parameter structure
*/
if (scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
sizeof(scsi_cmd), (u_char *)&scsi_sense, sizeof(scsi_sense),
SDRETRIES, 6000, NULL, flags | SCSI_DATA_IN) != 0) {
printf("%s: could not mode sense (4)", sd->sc_dev.dv_xname);
fake_it:
printf("; using fictitious geometry\n");
/*
* use adaptec standard fictitious geometry
* this depends on which controller (e.g. 1542C is
* different. but we have to put SOMETHING here..)
*/
sectors = sd_size(sd, flags);
dp->heads = 64;
dp->sectors = 32;
dp->cyls = sectors / (64 * 32);
dp->blksize = 512;
dp->disksize = sectors;
} else {
SC_DEBUG(sd->sc_link, SDEV_DB3,
("%d cyls, %d heads, %d precomp, %d red_write, %d land_zone\n",
_3btol(&scsi_sense.pages.rigid_geometry.ncyl_2),
scsi_sense.pages.rigid_geometry.nheads,
b2tol(scsi_sense.pages.rigid_geometry.st_cyl_wp),
b2tol(scsi_sense.pages.rigid_geometry.st_cyl_rwc),
b2tol(scsi_sense.pages.rigid_geometry.land_zone)));
/*
* KLUDGE!! (for zone recorded disks)
* give a number of sectors so that sec * trks * cyls
* is <= disk_size
* can lead to wasted space! THINK ABOUT THIS !
*/
dp->heads = scsi_sense.pages.rigid_geometry.nheads;
dp->cyls =
_3btol(&scsi_sense.pages.rigid_geometry.ncyl_2);
dp->blksize = _3btol(scsi_sense.blk_desc.blklen);
if (dp->heads == 0 || dp->cyls == 0) {
printf("%s: mode sense (4) returned nonsense",
sd->sc_dev.dv_xname);
goto fake_it;
}
if (dp->blksize == 0)
dp->blksize = 512;
sectors = sd_size(sd, flags);
dp->disksize = sectors;
sectors /= (dp->heads * dp->cyls);
dp->sectors = sectors; /* XXX dubious on SCSI */
}
return 0;
}
int
sdsize(dev)
dev_t dev;
{
struct sd_softc *sd;
int part;
int size;
if (sdopen(dev, 0, S_IFBLK, NULL) != 0)
return -1;
sd = sdcd.cd_devs[SDUNIT(dev)];
part = SDPART(dev);
if (sd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP)
size = -1;
else
size = sd->sc_dk.dk_label->d_partitions[part].p_size;
if (sdclose(dev, 0, S_IFBLK, NULL) != 0)
return -1;
return size;
}
#ifndef __BDEVSW_DUMP_OLD_TYPE
/* #define SD_DUMP_NOT_TRUSTED if you just want to watch */
static struct scsi_xfer sx;
static int sddoingadump;
/*
* dump all of physical memory into the partition specified, starting
* at offset 'dumplo' into the partition.
*/
int
sddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
struct sd_softc *sd; /* disk unit to do the I/O */
struct disklabel *lp; /* disk's disklabel */
int unit, part;
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 */
struct scsi_rw_big cmd; /* write command */
struct scsi_xfer *xs; /* ... convenience */
int retval;
/* Check if recursive dump; if so, punt. */
if (sddoingadump)
return EFAULT;
/* Mark as active early. */
sddoingadump = 1;
unit = SDUNIT(dev); /* Decompose unit & partition. */
part = SDPART(dev);
/* Check for acceptable drive number. */
if (unit >= sdcd.cd_ndevs || (sd = sdcd.cd_devs[unit]) == NULL)
return ENXIO;
/* Make sure it was initialized. */
if (sd->sc_link->flags & SDEV_MEDIA_LOADED != SDEV_MEDIA_LOADED)
return ENXIO;
/* Convert to disk sectors. Request must be a multiple of size. */
lp = sd->sc_dk.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;
xs = &sx;
while (totwrt > 0) {
nwrt = totwrt; /* XXX */
#ifndef SD_DUMP_NOT_TRUSTED
/*
* Fill out the scsi command
*/
bzero(&cmd, sizeof(cmd));
cmd.opcode = WRITE_BIG;
cmd.addr_3 = (blkno >> 24) & 0xff;
cmd.addr_2 = (blkno >> 16) & 0xff;
cmd.addr_1 = (blkno >> 8) & 0xff;
cmd.addr_0 = blkno & 0xff;
cmd.length2 = (nwrt >> 8) & 0xff;
cmd.length1 = nwrt & 0xff;
/*
* Fill out the scsi_xfer structure
* Note: we cannot sleep as we may be an interrupt
* don't use scsi_scsi_cmd() as it may want
* to wait for an xs.
*/
bzero(xs, sizeof(sx));
xs->flags |= SCSI_AUTOCONF | INUSE | SCSI_DATA_OUT;
xs->sc_link = sd->sc_link;
xs->retries = SDRETRIES;
xs->timeout = 10000; /* 10000 millisecs for a disk ! */
xs->cmd = (struct scsi_generic *)&cmd;
xs->cmdlen = sizeof(cmd);
xs->resid = nwrt * sectorsize;
xs->error = XS_NOERROR;
xs->bp = 0;
xs->data = va;
xs->datalen = nwrt * sectorsize;
/*
* Pass all this info to the scsi driver.
*/
retval = (*(sd->sc_link->adapter->scsi_cmd)) (xs);
if (retval != COMPLETE)
return ENXIO;
#else /* SD_DUMP_NOT_TRUSTED */
/* Let's just talk about this first... */
printf("sd%d: dump addr 0x%x, blk %d\n", unit, 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;
}
#else /* __BDEVSW_DUMP_NEW_TYPE */
int
sddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return ENXIO;
}
#endif /* __BDEVSW_DUMP_NEW_TYPE */
Reference in New Issue View Git Blame Copy Permalink