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added my responsibility for the `cpm' port
[unix-history] / sys / scsi / sd.c
/*
* 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
*
* $Id: sd.c,v 1.26 1994/05/26 00:23:24 jkh Exp $
*/
#define SPLSD splbio
#define ESUCCESS 0
#include <sd.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/dkbad.h>
#include <sys/systm.h>
#include <sys/conf.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/disklabel.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#include <vm/vm.h>
u_int32 sdstrats, sdqueues;
#ifdef NetBSD
#ifdef DDB
int Debugger();
#else /* DDB */
#define Debugger()
#endif /* DDB */
#else /* NetBSD */
#include <ddb.h>
#if NDDB > 0
#else /* NDDB > 0 */
#define Debugger(s)
#endif /* NDDB > 0 */
#endif
#define PAGESIZ 4096
#define SECSIZE 512
#define PDLOCATION 29
#define BOOTRECORDSIGNATURE (0x55aa & 0x00ff)
#define SDOUTSTANDING 2
#define SDQSIZE 4
#define SD_RETRIES 4
#define MAXTRANSFER 8 /* 1 page at a time */
#define MAKESDDEV(maj, unit, part) (makedev(maj,((unit<<3)+part)))
#define UNITSHIFT 3
#define PARTITION(z) (minor(z) & 0x07)
#define RAW_PART 3
#define UNIT(z) ( (minor(z) >> UNITSHIFT) )
#define WHOLE_DISK(unit) ( (unit << UNITSHIFT) + RAW_PART )
errval sdgetdisklabel __P((unsigned char unit));
errval sd_get_parms __P((int unit, int flags));
void sdstrategy __P((struct buf *));
void sdstart __P((u_int32));
struct scsi_device sd_switch =
{
NULL, /* Use default error handler */
sdstart, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"sd",
0,
{ 0, 0 }
};
struct sd_data {
u_int32 flags;
#define SDINIT 0x04 /* device has been init'd */
#define SDHAVELABEL 0x10 /* have read the label */
#define SDDOSPART 0x20 /* Have read the DOS partition table */
#define SDWRITEPROT 0x40 /* Device in readonly mode (S/W) */
struct scsi_link *sc_link; /* contains our targ, lun etc. */
u_int32 ad_info; /* info about the adapter */
u_int32 cmdscount; /* cmds allowed outstanding by board */
boolean wlabel; /* label is writable */
struct disk_parms {
u_char heads; /* Number of heads */
u_int16 cyls; /* Number of cylinders */
u_char sectors; /*dubious *//* Number of sectors/track */
u_int16 secsiz; /* Number of bytes/sector */
u_int32 disksize; /* total number sectors */
} params;
struct disklabel disklabel;
#ifdef NetBSD
struct cpu_disklabel cpudisklabel;
#else
struct dos_partition dosparts[NDOSPART]; /* DOS view of disk */
#endif /* NetBSD */
u_int32 partflags[MAXPARTITIONS]; /* per partition flags */
#define SDOPEN 0x01
u_int32 openparts; /* one bit for each open partition */
u_int32 sd_start_of_unix; /* unix vs dos partitions */
struct buf buf_queue;
u_int32 xfer_block_wait;
} *sd_data[NSD];
static u_int32 next_sd_unit = 0;
static struct scsi_xfer sx;
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
errval
sdattach(sc_link)
struct scsi_link *sc_link;
{
u_int32 unit;
struct sd_data *sd;
struct disk_parms *dp;
unit = next_sd_unit++;
SC_DEBUG(sc_link, SDEV_DB2, ("sdattach: "));
/*
* Check we have the resources for another drive
*/
if (unit >= NSD) {
printf("Too many scsi disks..(%d > %d) reconfigure kernel\n",
(unit + 1), NSD);
return 0;
}
if (sd_data[unit]) {
printf("sd%d: unit already has storage allocated!\n", unit);
return 0;
}
sd = sd_data[unit] = malloc(sizeof(struct sd_data), M_DEVBUF, M_NOWAIT);
if (!sd) {
printf("malloc failed in sd.c\n");
return (0);
}
bzero(sd, sizeof(struct sd_data));
dp = &(sd->params);
/*
* Store information needed to contact our base driver
*/
sd->sc_link = sc_link;
sc_link->device = &sd_switch;
sc_link->dev_unit = unit;
if (sd->sc_link->adapter->adapter_info) {
sd->ad_info = ((*(sd->sc_link->adapter->adapter_info)) (sc_link->adapter_unit));
sd->cmdscount = sd->ad_info & AD_INF_MAX_CMDS;
if (sd->cmdscount > SDOUTSTANDING) {
sd->cmdscount = SDOUTSTANDING;
}
} else {
sd->ad_info = 1;
sd->cmdscount = 1;
}
sc_link->opennings = sd->cmdscount;
/*
* Use the subdriver to request information regarding
* the drive. We cannot use interrupts yet, so the
* request must specify this.
*/
sd_get_parms(unit, SCSI_NOSLEEP | SCSI_NOMASK);
printf("sd%d: %dMB (%d total sec), %d cyl, %d head, %d sec, bytes/sec %d\n",
unit,
dp->disksize / ((1024L * 1024L) / dp->secsiz),
dp->disksize,
dp->cyls,
dp->heads,
dp->sectors,
dp->secsiz);
sd->flags |= SDINIT;
return 0;
}
/*
* open the device. Make sure the partition info is a up-to-date as can be.
*/
errval
sdopen(dev)
int dev; /* XXX should be dev_t, but avoid promotion problems for now */
{
errval errcode = 0;
u_int32 unit, part;
struct sd_data *sd;
struct scsi_link *sc_link;
unit = UNIT(dev);
part = PARTITION(dev);
sd = sd_data[unit];
/*
* Check the unit is legal
*/
if (unit >= NSD) {
return (ENXIO);
}
/*
* Make sure the disk has been initialised
* At some point in the future, get the scsi driver
* to look for a new device if we are not initted
*/
if ((!sd) || (!(sd->flags & SDINIT))) {
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, NSD, part));
/*
* "unit attention" errors should occur here if the
* drive has been restarted or the pack changed.
* just ingnore the result, it's a decoy instruction
* The error code will act on the error though
* and invalidate any media information we had.
*/
scsi_test_unit_ready(sc_link, 0);
/*
* If it's been invalidated, then forget the label
*/
sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */
if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
sd->flags &= ~SDHAVELABEL;
/*
* If somebody still has it open, then forbid re-entry.
*/
if (sd->openparts) {
errcode = ENXIO;
goto bad;
}
}
/*
* In case it is a funny one, tell it to start
* not needed for most hard drives (ignore failure)
*/
scsi_start_unit(sc_link, SCSI_ERR_OK | SCSI_SILENT);
/*
* Check that it is still responding and ok.
*/
if (scsi_test_unit_ready(sc_link, 0)) {
SC_DEBUG(sc_link, SDEV_DB3, ("device not reponding\n"));
errcode = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("device ok\n"));
/*
* Load the physical device parameters
*/
sd_get_parms(unit, 0); /* sets SDEV_MEDIA_LOADED */
if (sd->params.secsiz != SECSIZE) { /* XXX One day... */
printf("sd%d: Can't deal with %d bytes logical blocks\n",
unit, sd->params.secsiz);
Debugger("sd");
errcode = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded "));
/* Lock the pack in. */
scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT);
/*
* Load the partition info if not already loaded.
*/
if ((errcode = sdgetdisklabel(unit)) && (part != RAW_PART)) {
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded "));
/*
* Check the partition is legal
*/
if (part >= MAXPARTITIONS) {
errcode = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("partition ok"));
/*
* Check that the partition exists
*/
if ((sd->disklabel.d_partitions[part].p_size == 0)
&& (part != RAW_PART)) {
errcode = ENXIO;
goto bad;
}
sd->partflags[part] |= SDOPEN;
sd->openparts |= (1 << part);
SC_DEBUG(sc_link, SDEV_DB3, ("open %d %d\n", sdstrats, sdqueues));
return 0;
bad:
if (!(sd->openparts)) {
scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT);
sc_link->flags &= ~SDEV_OPEN;
}
return errcode;
}
/*
* close the device.. only called if we are the LAST occurence of an open
* device. Convenient now but usually a pain.
*/
errval
sdclose(dev)
dev_t dev;
{
unsigned char unit, part;
struct sd_data *sd;
unit = UNIT(dev);
part = PARTITION(dev);
sd = sd_data[unit];
sd->partflags[part] &= ~SDOPEN;
sd->openparts &= ~(1 << part);
scsi_prevent(sd->sc_link, PR_ALLOW, SCSI_SILENT | SCSI_ERR_OK);
if (!(sd->openparts))
sd->sc_link->flags &= ~SDEV_OPEN;
return 0;
}
/*
* trim the size of the transfer if needed, called by physio
* basically the smaller of our max and the scsi driver's
* minphys (note we have no max)
*
* Trim buffer length if buffer-size is bigger than page size
*/
void
sdminphys(bp)
struct buf *bp;
{
(*(sd_data[UNIT(bp->b_dev)]->sc_link->adapter->scsi_minphys)) (bp);
}
/*
* 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 buf *dp;
u_int32 opri;
struct sd_data *sd;
u_int32 unit;
sdstrats++;
unit = UNIT((bp->b_dev));
sd = sd_data[unit];
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));
sdminphys(bp);
/*
* If the device has been made invalid, error out
*/
if (!(sd->sc_link->flags & SDEV_MEDIA_LOADED)) {
sd->flags &= ~SDHAVELABEL;
bp->b_error = EIO;
goto bad;
}
/*
* "soft" write protect check
*/
if ((sd->flags & SDWRITEPROT) && (bp->b_flags & B_READ) == 0) {
bp->b_error = EROFS;
goto bad;
}
/*
* If it's a null transfer, return immediatly
*/
if (bp->b_bcount == 0) {
goto done;
}
/*
* Decide which unit and partition we are talking about
* only raw is ok if no label
*/
if (PARTITION(bp->b_dev) != RAW_PART) {
if (!(sd->flags & SDHAVELABEL)) {
bp->b_error = EIO;
goto bad;
}
/*
* do bounds checking, adjust transfer. if error, process.
* if end of partition, just return
*/
if (bounds_check_with_label(bp, &sd->disklabel, sd->wlabel) <= 0)
goto done;
/* otherwise, process transfer request */
} else {
bp->b_pblkno = bp->b_blkno;
bp->b_resid = 0;
}
opri = SPLSD();
dp = &sd->buf_queue;
/*
* Use a bounce buffer if necessary
*/
#ifndef NOBOUNCE
if (sd->sc_link->flags & SDEV_BOUNCE)
vm_bounce_alloc(bp);
#endif
/*
* Place it in the queue of disk activities for this disk
*/
cldisksort(dp, bp, 64*1024);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
*/
sdstart(unit);
splx(opri);
return /*0*/;
bad:
bp->b_flags |= B_ERROR;
done:
/*
* Correctly set the buf to indicate a completed xfer
*/
bp->b_resid = bp->b_bcount;
biodone(bp);
return /*0*/;
}
/*
* 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 SPLSD from sdstrategy and scsi_done
*/
void
sdstart(unit)
u_int32 unit;
{
register struct sd_data *sd = sd_data[unit];
register struct scsi_link *sc_link = sd->sc_link;
struct buf *bp = 0;
struct buf *dp;
struct scsi_rw_big cmd;
u_int32 blkno, nblk;
struct partition *p;
SC_DEBUG(sc_link, SDEV_DB2, ("sdstart "));
/*
* Check if the device has room for another command
*/
while (sc_link->opennings) {
/*
* 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) {
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->av_forw;
/*
* If the device has become invalid, abort all the
* reads and writes until all files have been closed and
* re-openned
*/
if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
sd->flags &= ~SDHAVELABEL;
goto bad;
}
/*
* We have a buf, now we know we are going to go through
* With this thing..
*
* First, translate the block to absolute
*/
p = sd->disklabel.d_partitions + PARTITION(bp->b_dev);
blkno = bp->b_blkno + p->p_offset;
nblk = (bp->b_bcount + 511) >> 9;
/*
* Fill out the scsi command
*/
bzero(&cmd, sizeof(cmd));
cmd.op_code = (bp->b_flags & B_READ)
? READ_BIG : WRITE_BIG;
cmd.addr_3 = (blkno & 0xff000000UL) >> 24;
cmd.addr_2 = (blkno & 0xff0000) >> 16;
cmd.addr_1 = (blkno & 0xff00) >> 8;
cmd.addr_0 = blkno & 0xff;
cmd.length2 = (nblk & 0xff00) >> 8;
cmd.length1 = (nblk & 0xff);
/*
* Call the routine that chats with the adapter.
* Note: we cannot sleep as we may be an interrupt
*/
if (scsi_scsi_cmd(sc_link,
(struct scsi_generic *) &cmd,
sizeof(cmd),
(u_char *) bp->b_un.b_addr,
bp->b_bcount,
SD_RETRIES,
10000,
bp,
SCSI_NOSLEEP | ((bp->b_flags & B_READ) ?
SCSI_DATA_IN : SCSI_DATA_OUT))
== SUCCESSFULLY_QUEUED) {
sdqueues++;
} else {
bad:
printf("sd%d: oops not queued", unit);
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
biodone(bp);
}
}
}
/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
errval
sdioctl(dev_t dev, int cmd, caddr_t addr, int flag)
{
/* struct sd_cmd_buf *args; */
errval error = 0;
unsigned char unit, part;
register struct sd_data *sd;
/*
* Find the device that the user is talking about
*/
unit = UNIT(dev);
part = PARTITION(dev);
sd = sd_data[unit];
SC_DEBUG(sd->sc_link, SDEV_DB1, ("sdioctl (0x%x)", cmd));
/*
* If the device is not valid.. abandon ship
*/
if (!(sd->sc_link->flags & SDEV_MEDIA_LOADED))
return (EIO);
switch (cmd) {
case DIOCSBAD:
error = EINVAL;
break;
case DIOCGDINFO:
*(struct disklabel *) addr = sd->disklabel;
break;
case DIOCGPART:
((struct partinfo *) addr)->disklab = &sd->disklabel;
((struct partinfo *) addr)->part =
&sd->disklabel.d_partitions[PARTITION(dev)];
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
error = EBADF;
else
error = setdisklabel(&sd->disklabel,
(struct disklabel *)addr,
/*(sd->flags & DKFL_BSDLABEL) ? sd->openparts : */ 0,
#ifdef NetBSD
&sd->cpudisklabel
#else
sd->dosparts
#endif
);
if (error == 0) {
sd->flags |= SDHAVELABEL;
}
break;
case DIOCWLABEL:
sd->flags &= ~SDWRITEPROT;
if ((flag & FWRITE) == 0)
error = EBADF;
else
sd->wlabel = *(boolean *) addr;
break;
case DIOCWDINFO:
sd->flags &= ~SDWRITEPROT;
if ((flag & FWRITE) == 0)
error = EBADF;
else {
error = setdisklabel(&sd->disklabel,
(struct disklabel *)addr,
/*(sd->flags & SDHAVELABEL) ? sd->openparts : */ 0,
#ifdef NetBSD
&sd->cpudisklabel
#else
sd->dosparts
#endif
);
if (!error) {
boolean wlab;
/* ok - write will succeed */
sd->flags |= SDHAVELABEL;
/* simulate opening partition 0 so write succeeds */
sd->openparts |= (1 << 0); /* XXX */
wlab = sd->wlabel;
sd->wlabel = 1;
error = writedisklabel(dev, sdstrategy,
&sd->disklabel,
#ifdef NetBSD
&sd->cpudisklabel
#else
sd->dosparts
#endif
);
sd->wlabel = wlab;
}
}
break;
default:
if (part == RAW_PART)
error = scsi_do_ioctl(sd->sc_link, cmd, addr, flag);
else
error = ENOTTY;
break;
}
return error;
}
/*
* Load the label information on the named device
*/
errval
sdgetdisklabel(unsigned char unit)
{
char *errstring;
struct sd_data *sd = sd_data[unit];
/*
* If the inflo is already loaded, use it
*/
if (sd->flags & SDHAVELABEL)
return (ESUCCESS);
bzero(&sd->disklabel, sizeof(struct disklabel));
/*
* make partition 3 the whole disk in case of failure then get pdinfo
* for historical reasons, make part a same as raw part
*/
sd->disklabel.d_partitions[0].p_offset = 0;
sd->disklabel.d_partitions[0].p_size = sd->params.disksize;
sd->disklabel.d_partitions[RAW_PART].p_offset = 0;
sd->disklabel.d_partitions[RAW_PART].p_size = sd->params.disksize;
sd->disklabel.d_npartitions = MAXPARTITIONS;
sd->disklabel.d_secsize = SECSIZE; /* as long as it's not 0 */
sd->disklabel.d_ntracks = sd->params.heads;
sd->disklabel.d_nsectors = sd->params.sectors;
sd->disklabel.d_ncylinders = sd->params.cyls;
sd->disklabel.d_secpercyl = sd->params.heads * sd->params.sectors;
if (sd->disklabel.d_secpercyl == 0) {
sd->disklabel.d_secpercyl = 100;
/* as long as it's not 0 - readdisklabel divides by it (?) */
}
/*
* Call the generic disklabel extraction routine
*/
if (errstring = readdisklabel(makedev(0, (unit << UNITSHIFT) + 3),
sdstrategy,
&sd->disklabel,
#ifdef NetBSD
&sd->cpudisklabel
#else
sd->dosparts,
0,
0
#endif
)) {
printf("sd%d: %s\n", unit, errstring);
return ENXIO;
}
sd->flags |= SDHAVELABEL; /* WE HAVE IT ALL NOW */
return ESUCCESS;
}
/*
* Find out from the device what it's capacity is
*/
u_int32
sd_size(unit, flags)
int unit, flags;
{
struct scsi_read_cap_data rdcap;
struct scsi_read_capacity scsi_cmd;
u_int32 size;
/*
* make up a scsi command and ask the scsi driver to do
* it for you.
*/
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = READ_CAPACITY;
/*
* If the command works, interpret the result as a 4 byte
* number of blocks
*/
if (scsi_scsi_cmd(sd_data[unit]->sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
(u_char *) & rdcap,
sizeof(rdcap),
SD_RETRIES,
2000,
NULL,
flags | SCSI_DATA_IN) != 0) {
printf("sd%d: could not get size\n", unit);
return (0);
} else {
size = rdcap.addr_0 + 1;
size += rdcap.addr_1 << 8;
size += rdcap.addr_2 << 16;
size += rdcap.addr_3 << 24;
}
return (size);
}
/*
* Tell the device to map out a defective block
*/
errval
sd_reassign_blocks(unit, block)
int unit, 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.op_code = 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_data[unit]->sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
(u_char *) & rbdata,
sizeof(rbdata),
SD_RETRIES,
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.
*/
errval
sd_get_parms(unit, flags)
int unit, flags;
{
struct sd_data *sd = sd_data[unit];
struct disk_parms *disk_parms = &sd->params;
struct scsi_mode_sense scsi_cmd;
struct scsi_mode_sense_data {
struct scsi_mode_header header;
struct blk_desc blk_desc;
union disk_pages pages;
} scsi_sense;
u_int32 sectors;
/*
* First check if we have it all loaded
*/
if (sd->sc_link->flags & SDEV_MEDIA_LOADED)
return 0;
/*
* do a "mode sense page 4"
*/
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = 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),
SD_RETRIES,
2000,
NULL,
flags | SCSI_DATA_IN) != 0) {
printf("sd%d could not mode sense (4).", unit);
printf(" Using ficticious geometry\n");
/*
* use adaptec standard ficticious geometry
* this depends on which controller (e.g. 1542C is
* different. but we have to put SOMETHING here..)
*/
sectors = sd_size(unit, flags);
disk_parms->heads = 64;
disk_parms->sectors = 32;
disk_parms->cyls = sectors / (64 * 32);
disk_parms->secsiz = SECSIZE;
disk_parms->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 !
*/
disk_parms->heads = scsi_sense.pages.rigid_geometry.nheads;
disk_parms->cyls = _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2);
disk_parms->secsiz = _3btol(scsi_sense.blk_desc.blklen);
sectors = sd_size(unit, flags);
disk_parms->disksize = sectors;
/* Check if none of these values are zero */
if(disk_parms->heads && disk_parms->cyls) {
sectors /= (disk_parms->heads * disk_parms->cyls);
}
else {
/* set it to something reasonable */
disk_parms->heads = 64;
disk_parms->cyls = sectors / (64 * 32);
sectors = 32;
}
/* keep secsiz sane too - we may divide by it later */
if(disk_parms->secsiz == 0)
disk_parms->secsiz = SECSIZE;
disk_parms->sectors = sectors; /* dubious on SCSI *//*XXX */
}
sd->sc_link->flags |= SDEV_MEDIA_LOADED;
return 0;
}
int
sdsize(dev_t dev)
{
u_int32 unit = UNIT(dev), part = PARTITION(dev), val;
struct sd_data *sd;
if (unit >= NSD)
return -1;
sd = sd_data[unit];
if (!sd)
return -1;
if ((sd->flags & SDINIT) == 0)
return -1;
if (sd == 0 || (sd->flags & SDHAVELABEL) == 0) {
val = sdopen(MAKESDDEV(major(dev), unit, RAW_PART), FREAD, S_IFBLK, 0);
if (val != 0)
return -1;
}
if (sd->flags & SDWRITEPROT)
return -1;
return (int)sd->disklabel.d_partitions[part].p_size;
}
/*
* dump all of physical memory into the partition specified, starting
* at offset 'dumplo' into the partition.
*/
errval
sddump(dev_t dev)
{ /* dump core after a system crash */
register struct sd_data *sd; /* disk unit to do the IO */
int32 num; /* number of sectors to write */
u_int32 unit, part;
int32 blkoff, blknum, blkcnt = MAXTRANSFER;
int32 nblocks;
char *addr;
struct scsi_rw_big cmd;
extern int Maxmem;
static int sddoingadump = 0;
extern caddr_t CADDR1; /* map the page we are about to write, here */
extern struct pte *CMAP1;
struct scsi_xfer *xs = &sx;
errval retval;
int c;
addr = (char *) 0; /* starting address */
/* toss any characters present prior to dump */
while ((c = sgetc(1)) && (c != 0x100)); /*syscons and pccons differ */
/* size of memory to dump */
num = Maxmem;
unit = UNIT(dev); /* eventually support floppies? */
part = PARTITION(dev); /* file system */
/* check for acceptable drive number */
if (unit >= NSD)
return (ENXIO);
sd = sd_data[unit];
if (!sd)
return (ENXIO);
/* was it ever initialized etc. ? */
if (!(sd->flags & SDINIT))
return (ENXIO);
if (sd->sc_link->flags & SDEV_MEDIA_LOADED != SDEV_MEDIA_LOADED)
return (ENXIO);
if (sd->flags & SDWRITEPROT)
return (ENXIO);
/* Convert to disk sectors */
num = (u_int32) num * NBPG / sd->disklabel.d_secsize;
/* check if controller active */
if (sddoingadump)
return (EFAULT);
nblocks = sd->disklabel.d_partitions[part].p_size;
blkoff = sd->disklabel.d_partitions[part].p_offset;
/* check transfer bounds against partition size */
if ((dumplo < 0) || ((dumplo + num) > nblocks))
return (EINVAL);
sddoingadump = 1;
blknum = dumplo + blkoff;
while (num > 0) {
*(int *)CMAP1 =
PG_V | PG_KW | trunc_page(addr);
tlbflush();
/*
* Fill out the scsi command
*/
bzero(&cmd, sizeof(cmd));
cmd.op_code = WRITE_BIG;
cmd.addr_3 = (blknum & 0xff000000) >> 24;
cmd.addr_2 = (blknum & 0xff0000) >> 16;
cmd.addr_1 = (blknum & 0xff00) >> 8;
cmd.addr_0 = blknum & 0xff;
cmd.length2 = (blkcnt & 0xff00) >> 8;
cmd.length1 = (blkcnt & 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_NOMASK | SCSI_NOSLEEP | INUSE;
xs->sc_link = sd->sc_link;
xs->retries = SD_RETRIES;
xs->timeout = 10000; /* 10000 millisecs for a disk ! */
xs->cmd = (struct scsi_generic *) &cmd;
xs->cmdlen = sizeof(cmd);
xs->resid = blkcnt * 512;
xs->error = XS_NOERROR;
xs->bp = 0;
xs->data = (u_char *) CADDR1;
xs->datalen = blkcnt * 512;
/*
* Pass all this info to the scsi driver.
*/
retval = (*(sd->sc_link->adapter->scsi_cmd)) (xs);
switch (retval) {
case SUCCESSFULLY_QUEUED:
case HAD_ERROR:
return (ENXIO); /* we said not to sleep! */
case COMPLETE:
break;
default:
return (ENXIO); /* we said not to sleep! */
}
if ((unsigned) addr % (1024 * 1024) == 0)
printf("%d ", num / 2048);
/* update block count */
num -= blkcnt;
blknum += blkcnt;
(int) addr += 512 * blkcnt;
/* operator aborting dump? */
if ((c = sgetc(1)) && (c != 0x100))
return (EINTR);
}
return (0);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.