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1b52479293
freebsd-skq/sys/scsi/sd.c
Peter Dufault 1b52479293 Submitted by: ache 
Fix extra newline during SCSI_VERBOSE.
1995-04-29 17:52:44 +00:00

969 lines
24 KiB
C
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/*
* 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 1.60 1995/04/23 22:07:53 gibbs Exp $
*/
#define SPLSD splbio
#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/dkstat.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#include <vm/vm.h>
#include <sys/devconf.h>
#include <sys/dkstat.h>
#include <machine/md_var.h>
#include <i386/i386/cons.h> /* XXX */
u_int32 sdstrats, sdqueues;
#define SECSIZE 512
#define SDOUTSTANDING 4
#define SD_RETRIES 4
#define MAXTRANSFER 8 /* 1 page at a time */
#define PARTITION(dev) dkpart(dev)
#define SDUNIT(dev) dkunit(dev)
/* XXX introduce a dkmodunit() macro for this. */
#define SDSETUNIT(DEV, U) \
makedev(major(DEV), dkmakeminor((U), dkslice(DEV), dkpart(DEV)))
errval sd_get_parms __P((int unit, int flags));
static void sdstrategy1 __P((struct buf *));
int sd_sense_handler __P((struct scsi_xfer *));
void sdstart __P((u_int32, u_int32));
struct scsi_data {
u_int32 flags;
#define SDINIT 0x04 /* device has been init'd */
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 diskslices *dk_slices; /* virtual drives */
struct buf buf_queue;
int dkunit; /* disk stats unit number */
};
static int sdunit(dev_t dev) { return SDUNIT(dev); }
static dev_t sdsetunit(dev_t dev, int unit) { return SDSETUNIT(dev, unit); }
errval sd_open __P((dev_t dev, int mode, int fmt, struct proc *p,
struct scsi_link *sc_link));
errval sd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag,
struct proc *p, struct scsi_link *sc_link);
errval sd_close __P((dev_t dev, int fflag, int fmt, struct proc *p,
struct scsi_link *sc_link));
void sd_strategy(struct buf *bp, struct scsi_link *sc_link);
SCSI_DEVICE_ENTRIES(sd)
struct scsi_device sd_switch =
{
sd_sense_handler,
sdstart, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"sd",
0,
{0, 0},
0, /* Link flags */
sdattach,
"Direct-Access",
sdopen,
sizeof(struct scsi_data),
T_DIRECT,
sdunit,
sdsetunit,
sd_open,
sd_ioctl,
sd_close,
sd_strategy,
};
static struct scsi_xfer sx;
static int
sd_externalize(struct proc *p, struct kern_devconf *kdc, void *userp,
size_t len)
{
return scsi_externalize(SCSI_LINK(&sd_switch, kdc->kdc_unit),
userp, &len);
}
static struct kern_devconf kdc_sd_template = {
0, 0, 0, /* filled in by dev_attach */
"sd", 0, MDDC_SCSI,
sd_externalize, 0, scsi_goaway, SCSI_EXTERNALLEN,
&kdc_scbus0, /* XXX parent */
0, /* parentdata */
DC_UNKNOWN, /* not supported */
};
static inline void
sd_registerdev(int unit)
{
struct kern_devconf *kdc;
MALLOC(kdc, struct kern_devconf *, sizeof *kdc, M_TEMP, M_NOWAIT);
if(!kdc) return;
*kdc = kdc_sd_template;
kdc->kdc_unit = unit;
kdc->kdc_description = sd_switch.desc;
dev_attach(kdc);
if(dk_ndrive < DK_NDRIVE) {
sprintf(dk_names[dk_ndrive], "sd%d", unit);
dk_wpms[dk_ndrive] = (8*1024*1024/2);
SCSI_DATA(&sd_switch, unit)->dkunit = dk_ndrive++;
} else {
SCSI_DATA(&sd_switch, unit)->dkunit = -1;
}
}
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
errval
sdattach(struct scsi_link *sc_link)
{
u_int32 unit;
struct disk_parms *dp;
struct scsi_data *sd = sc_link->sd;
unit = sc_link->dev_unit;
dp = &(sd->params);
if (sc_link->opennings > SDOUTSTANDING)
sc_link->opennings = SDOUTSTANDING;
/*
* 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);
/*
* if we don't have actual parameters, assume 512 bytes/sec
* (could happen on removable media - MOD)
* -- this avoids the division below from falling over
*/
if(dp->secsiz == 0) dp->secsiz = SECSIZE;
printf("%ldMB (%ld %d byte sectors)",
dp->disksize / ((1024L * 1024L) / dp->secsiz),
dp->disksize,
dp->secsiz);
#ifndef SCSI_REPORT_GEOMETRY
if ( (sc_link->flags & SDEV_BOOTVERBOSE) )
#endif
{
sc_print_addr(sc_link);
printf("with %d cyls, %d heads, and an average %d sectors/track",
dp->cyls, dp->heads, dp->sectors);
}
sd->flags |= SDINIT;
sd_registerdev(unit);
return 0;
}
/*
* open the device. Make sure the partition info is a up-to-date as can be.
*/
errval
sd_open(dev, mode, fmt, p, sc_link)
dev_t dev;
int mode;
int fmt;
struct proc *p;
struct scsi_link *sc_link;
{
errval errcode = 0;
u_int32 unit;
struct disklabel label;
struct scsi_data *sd;
unit = SDUNIT(dev);
sd = sc_link->sd;
/*
* 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_DEBUG(sc_link, SDEV_DB1,
("sd_open: dev=0x%lx (unit %ld, partition %d)\n",
dev, unit, PARTITION(dev)));
/*
* "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)) {
/*
* If somebody still has it open, then forbid re-entry.
*/
if (dsisopen(sd->dk_slices)) {
errcode = ENXIO;
goto bad;
}
if (sd->dk_slices == NULL)
Debugger("sdopen: no slices");
else
dsgone(&sd->dk_slices);
}
/*
* 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%ld: 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);
/* Build label for whole disk. */
bzero(&label, sizeof label);
label.d_secsize = sd->params.secsiz;
label.d_nsectors = sd->params.sectors;
label.d_ntracks = sd->params.heads;
label.d_ncylinders = sd->params.cyls;
label.d_secpercyl = sd->params.heads * sd->params.sectors;
if (label.d_secpercyl == 0)
label.d_secpercyl = 100;
/* XXX as long as it's not 0 - readdisklabel divides by it (?) */
label.d_secperunit = sd->params.disksize;
/* Initialize slice tables. */
errcode = dsopen("sd", dev, fmt, &sd->dk_slices, &label, sdstrategy1,
(ds_setgeom_t *)NULL);
if (errcode != 0)
goto bad;
SC_DEBUG(sc_link, SDEV_DB3, ("Slice tables initialized "));
SC_DEBUG(sc_link, SDEV_DB3, ("open %ld %ld\n", sdstrats, sdqueues));
return 0;
bad:
if (!dsisopen(sd->dk_slices)) {
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
sd_close(dev, fflag, fmt, p, sc_link)
dev_t dev;
int fflag;
int fmt;
struct proc *p;
struct scsi_link *sc_link;
{
struct scsi_data *sd;
sd = sc_link->sd;
dsclose(dev, fmt, sd->dk_slices);
if (!dsisopen(sd->dk_slices)) {
scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT | SCSI_ERR_OK);
sc_link->flags &= ~SDEV_OPEN;
}
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
sd_strategy(struct buf *bp, struct scsi_link *sc_link)
{
struct buf *dp;
u_int32 opri;
struct scsi_data *sd;
u_int32 unit;
sdstrats++;
unit = SDUNIT((bp->b_dev));
sd = sc_link->sd;
/*
* If the device has been made invalid, error out
*/
if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
bp->b_error = EIO;
goto bad;
}
/*
* Odd number of bytes
*/
if (bp->b_bcount % DEV_BSIZE != 0) {
bp->b_error = EINVAL;
goto bad;
}
/*
* Do bounds checking, adjust transfer, set b_cylin and b_pbklno.
*/
if (dscheck(bp, sd->dk_slices) <= 0)
goto done; /* XXX check b_resid */
opri = SPLSD();
dp = &sd->buf_queue;
/*
* Use a bounce buffer if necessary
*/
#ifdef BOUNCE_BUFFERS
if (sc_link->flags & SDEV_BOUNCE)
vm_bounce_alloc(bp);
#endif
/*
* Place it in the queue of disk activities for this disk
*/
disksort(dp, bp);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
*/
sdstart(unit, 0);
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*/;
}
static void
sdstrategy1(struct buf *bp)
{
/*
* XXX - do something to make sdstrategy() but not this block while
* we're doing dsinit() and dsioctl().
*/
sdstrategy(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 SPLSD from sdstrategy and scsi_done
*/
void
sdstart(u_int32 unit, u_int32 flags)
{
register struct scsi_link *sc_link = SCSI_LINK(&sd_switch, unit);
register struct scsi_data *sd = sc_link->sd;
struct buf *bp = 0;
struct buf *dp;
struct scsi_rw_big cmd;
u_int32 blkno, nblk;
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->b_actf;
/*
* 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)) {
goto bad;
}
/*
* We have a buf, now we know we are going to go through
* With this thing..
*/
blkno = bp->b_pblkno;
if (bp->b_bcount & (SECSIZE - 1))
{
goto bad;
}
nblk = bp->b_bcount >> 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,
flags | ((bp->b_flags & B_READ) ?
SCSI_DATA_IN : SCSI_DATA_OUT))
== SUCCESSFULLY_QUEUED) {
sdqueues++;
if(sd->dkunit >= 0) {
dk_xfer[sd->dkunit]++;
dk_seek[sd->dkunit]++; /* don't know */
dk_wds[sd->dkunit] += bp->b_bcount >> 6;
}
} else {
bad:
printf("sd%ld: oops not queued\n", 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
sd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p,
struct scsi_link *sc_link)
{
/* struct sd_cmd_buf *args; */
errval error;
struct scsi_data *sd;
/*
* Find the device that the user is talking about
*/
sd = sc_link->sd;
SC_DEBUG(sc_link, SDEV_DB1, ("sdioctl (0x%x)", cmd));
#if 0
/* Wait until we have exclusive access to the device. */
/* XXX this is how wd does it. How did we work without this? */
wdsleep(du->dk_ctrlr, "wdioct");
#endif
/*
* If the device is not valid.. abandon ship
*/
if (!(sc_link->flags & SDEV_MEDIA_LOADED))
return (EIO);
if (cmd == DIOCSBAD)
return (EINVAL); /* XXX */
error = dsioctl(dev, cmd, addr, flag, sd->dk_slices, sdstrategy1,
(ds_setgeom_t *)NULL);
if (error != -1)
return (error);
if (PARTITION(dev) != RAW_PART && !SCSI_SUPER(dev))
return (ENOTTY);
return (scsi_do_ioctl(dev, cmd, addr, flag, p, sc_link));
}
/*
* 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;
struct scsi_link *sc_link = SCSI_LINK(&sd_switch, unit);
/*
* 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(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;
struct scsi_link *sc_link = SCSI_LINK(&sd_switch, unit);
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(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 scsi_link *sc_link = SCSI_LINK(&sd_switch, unit);
struct scsi_data *sd = sc_link->sd;
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 (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(sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
(u_char *) & scsi_sense,
sizeof(scsi_sense),
SD_RETRIES,
4000,
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(sc_link, SDEV_DB3,
("%ld cyls, %d heads, %d precomp, %d red_write, %d land_zone\n",
scsi_3btou(&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 = scsi_3btou(&scsi_sense.pages.rigid_geometry.ncyl_2);
disk_parms->secsiz = scsi_3btou(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 */
}
sc_link->flags |= SDEV_MEDIA_LOADED;
return 0;
}
int
sdsize(dev_t dev)
{
u_int32 unit = SDUNIT(dev), part = PARTITION(dev);
struct scsi_data *sd;
struct disklabel *lp;
if ((sd = SCSI_DATA(&sd_switch, unit)) == NULL)
return -1;
if ((sd->flags & SDINIT) == 0)
return -1;
if (!dsisopen(sd->dk_slices)) {
if (sdopen(dkmodpart(dev, RAW_PART), FREAD, S_IFBLK,
(struct proc *)NULL) != 0)
return (-1);
sdclose(dkmodpart(dev, RAW_PART), FREAD/*XXX?*/, S_IFBLK,
(struct proc *)NULL);
}
lp = dsgetlabel(dev, sd->dk_slices);
if (lp == NULL)
return (-1);
return ((int)lp->d_partitions[part].p_size);
}
/*
* sense handler: Called to determine what to do when the
* device returns a CHECK CONDITION.
*
* This will issue a retry when the device returns a
* non-media hardware failure. The CDC-WREN IV does this
* when you access it during thermal calibrarion, so the drive
* is pretty useless without this.
*
* In general, you probably almost always would like to issue a retry
* for your disk I/O. It can't hurt too much (the caller only retries
* so many times) and it may save your butt.
*/
int sd_sense_handler(struct scsi_xfer *xs)
{
struct scsi_sense_data *sense;
struct scsi_inquiry_data *inqbuf;
sense = &(xs->sense);
/* I don't know what the heck to do with a deferred error,
* so I'll just kick it back to the caller.
*/
if ((sense->error_code & SSD_ERRCODE) == 0x71)
return SCSIRET_CONTINUE;
if (((sense->error_code & SSD_ERRCODE) == 0x70) &&
((sense->ext.extended.flags & SSD_KEY) == 0x05))
/* No point in retrying Illegal Requests */
return SCSIRET_CONTINUE;
inqbuf = &(xs->sc_link->inqbuf);
/* It is dangerous to retry on removable drives without
* looking carefully at the additional sense code
* and sense code qualifier and ensuring the disk hasn't changed:
*/
if (inqbuf->dev_qual2 & SID_REMOVABLE)
return SCSIRET_CONTINUE;
/* Retry all disk errors.
*/
scsi_sense_print(xs);
if (xs->retries)
printf(", retries:%d\n", xs->retries);
else
printf(", FAILURE\n");
return SCSIRET_DO_RETRY;
}
/*
* 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 */
struct disklabel *lp;
register struct scsi_data *sd; /* disk unit to do the IO */
struct scsi_link *sc_link;
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;
static int sddoingadump = 0;
struct scsi_xfer *xs = &sx;
errval retval;
addr = (char *) 0; /* starting address */
/* toss any characters present prior to dump */
while (cncheckc())
;
/* size of memory to dump */
num = Maxmem;
unit = SDUNIT(dev); /* eventually support floppies? */
part = PARTITION(dev); /* file system */
sc_link = SCSI_LINK(&sd_switch, unit);
if (!sc_link)
return ENXIO;
sd = sc_link->sd;
/* was it ever initialized etc. ? */
if (!(sd->flags & SDINIT))
return (ENXIO);
if ((sc_link->flags & SDEV_MEDIA_LOADED) != SDEV_MEDIA_LOADED)
return (ENXIO);
if (sd->dk_slices == NULL)
Debugger("sddump: no slices");
if ((lp = dsgetlabel(dev, sd->dk_slices)) == NULL)
return (ENXIO);
/* Convert to disk sectors */
num = (u_int32) num * NBPG / sd->params.secsiz; /* XXX it must be 512 */
/* check if controller active */
if (sddoingadump)
return (EFAULT);
nblocks = lp->d_partitions[part].p_size;
blkoff = lp->d_partitions[part].p_offset;
/* XXX */
blkoff += sd->dk_slices->dss_slices[dkslice(dev)].ds_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 = /* XXX use pmap_enter() */
PG_V | PG_KW | trunc_page(addr);
pmap_update();
/*
* 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 | SCSI_DATA_OUT;
xs->sc_link = 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 = 0;
xs->error = XS_NOERROR;
xs->bp = 0;
xs->data = (u_char *) CADDR1; /* XXX use pmap_enter() */
xs->datalen = blkcnt * SECSIZE;
/*
* Pass all this info to the scsi driver.
*/
retval = (*(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("%ld ", num / 2048);
/* update block count */
num -= blkcnt;
blknum += blkcnt;
(int) addr += SECSIZE * blkcnt;
/* operator aborting dump? */
if (cncheckc())
return (EINTR);
}
return (0);
}
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