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NetBSD/sys/scsi/sd.c
mycroft e5d974c51f First cut at making user-level SCSI commands work. This is untested. 
Partly from John Brezak.
1994-10-20 20:31:23 +00:00

1000 lines
26 KiB
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/* $NetBSD: sd.c,v 1.42 1994/10/20 20:31:31 mycroft Exp $ */
/*
* Copyright (c) 1994 Charles 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 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/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/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#ifdef DDB
int Debugger();
#else /* DDB */
#define Debugger()
#endif /* DDB */
#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_data {
struct device sc_dev;
struct dkdevice sc_dk;
int flags;
#define SDF_BSDLABEL 0x01 /* has a BSD disk label */
#define SDF_WRITEPROT 0x04 /* manual unit write protect */
#define SDF_WLABEL 0x08 /* label is writable */
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 */
struct disk_parms {
u_char heads; /* Number of heads */
u_int16 cyls; /* Number of cylinders */
u_char sectors; /* Number of sectors/track */
u_int32 blksize; /* Number of bytes/sector */
u_long disksize; /* total number sectors */
} params;
u_int32 xfer_block_wait;
struct buf buf_queue;
};
void sdattach __P((struct device *, struct device *, void *));
struct cfdriver sdcd = {
NULL, "sd", scsi_targmatch, sdattach, DV_DISK, sizeof(struct sd_data)
};
int sdgetdisklabel __P((struct sd_data *));
int sd_get_parms __P((struct sd_data *, int));
void sdstrategy __P((struct buf *));
void sdstart __P((int));
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 */
NULL, /* Use default 'done' routine */
"sd",
0
};
/*
* 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_data *sd = (void *)self;
struct disk_parms *dp = &sd->params;
struct scsi_link *sc_link = aux;
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->dev_unit = self->dv_unit;
sd->sc_dk.dk_driver = &sddkdriver;
#if !defined(i386) || defined(NEWCONFIG)
dk_establish(&sd->sc_dk, &sd->sc_dev);
#endif
if (sd->sc_link->adapter->adapter_info) {
sd->ad_info = ((*(sd->sc_link->adapter->adapter_info)) (sc_link->adapter_softc));
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(sd, SCSI_NOSLEEP | SCSI_NOMASK);
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);
}
/*
* 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;
{
int error = 0;
int unit, part;
struct sd_data *sd;
struct scsi_link *sc_link;
unit = SDUNIT(dev);
part = SDPART(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 it's been invalidated, then forget the label
*/
if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
sd->flags &= ~SDF_BSDLABEL;
/*
* If somebody still has it open, then forbid re-entry.
*/
if (sd->sc_dk.dk_openmask != 0)
return ENXIO;
}
/*
* "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, SCSI_SILENT);
/*
* In case it is a funny one, tell it to start
* not needed for most hard drives (ignore failure)
*/
scsi_start(sc_link, SSS_START, SCSI_ERR_OK | SCSI_SILENT);
/*
* Check that it is still responding and ok.
*/
sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */
if (scsi_test_unit_ready(sc_link, 0)) {
SC_DEBUG(sc_link, SDEV_DB3, ("device not reponding\n"));
error = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("device ok\n"));
/* Lock the pack in. */
scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT);
/*
* Load the physical device parameters
*/
if (sd_get_parms(sd, 0)) {
error = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded "));
/*
* Load the partition info if not already loaded.
*/
if ((error = sdgetdisklabel(sd)) && (part != RAW_PART))
goto bad;
SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded "));
/*
* 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"));
sc_link->flags |= SDEV_MEDIA_LOADED;
return 0;
bad:
if (sd->sc_dk.dk_openmask == 0) {
scsi_prevent(sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT);
sc_link->flags &= ~SDEV_OPEN;
}
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)
dev_t dev;
int flag, fmt;
{
struct sd_data *sd = sdcd.cd_devs[SDUNIT(dev)];
int part = SDPART(dev);
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) {
scsi_prevent(sd->sc_link, PR_ALLOW, SCSI_ERR_OK | SCSI_SILENT);
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;
{
register struct sd_data *sd = sdcd.cd_devs[SDUNIT(bp->b_dev)];
(sd->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;
{
int opri;
struct sd_data *sd;
int unit;
unit = SDUNIT(bp->b_dev);
sd = sdcd.cd_devs[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 &= ~SDF_BSDLABEL;
bp->b_error = EIO;
goto bad;
}
/*
* "soft" write protect check
*/
if ((sd->flags & SDF_WRITEPROT) && (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 (SDPART(bp->b_dev) != RAW_PART) {
if (!(sd->flags & SDF_BSDLABEL)) {
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->sc_dk.dk_label,
(sd->flags & SDF_WLABEL) != 0) <= 0)
goto done;
/* otherwise, process transfer request */
}
opri = 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(unit);
splx(opri);
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(unit)
int unit;
{
register struct sd_data *sd = sdcd.cd_devs[unit];
register struct scsi_link *sc_link = sd->sc_link;
struct buf *bp = 0;
struct buf *dp;
struct scsi_rw_big cmd;
int blkno, nblks;
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) {
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-openned
*/
if (!(sc_link->flags & SDEV_MEDIA_LOADED)) {
sd->flags &= ~SDF_BSDLABEL;
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
biodone(bp);
continue;
}
/*
* We have a buf, now we know we are going to go through
* With this thing..
*
* First, translate the block to absolute
*/
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
*/
bzero(&cmd, sizeof(cmd));
cmd.op_code = (bp->b_flags & B_READ) ? READ_BIG : WRITE_BIG;
cmd.addr_3 = (blkno & 0xff000000) >> 24;
cmd.addr_2 = (blkno & 0xff0000) >> 16;
cmd.addr_1 = (blkno & 0xff00) >> 8;
cmd.addr_0 = blkno & 0xff;
cmd.length2 = (nblks & 0xff00) >> 8;
cmd.length1 = (nblks & 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_data, bp->b_bcount,
SDRETRIES, 10000, bp, SCSI_NOSLEEP |
((bp->b_flags & B_READ) ? SCSI_DATA_IN : SCSI_DATA_OUT))
!= SUCCESSFULLY_QUEUED)
printf("%s: not queued", sd->sc_dev.dv_xname);
}
}
/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
int
sdioctl(dev, cmd, addr, flag)
dev_t dev;
int cmd;
caddr_t addr;
int flag;
{
int error = 0;
int unit, part;
register struct sd_data *sd;
/*
* Find the device that the user is talking about
*/
unit = SDUNIT(dev);
part = SDPART(dev);
sd = sdcd.cd_devs[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:
return EINVAL;
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 DIOCSDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(&sd->sc_dk.dk_label,
(struct disklabel *)addr,
/*(sd->flags & SDF_BSDLABEL) ? sd->sc_dk.dk_openmask : */0,
&sd->sc_dk.dk_cpulabel);
if (error == 0)
sd->flags |= SDF_BSDLABEL;
return error;
case DIOCWLABEL:
sd->flags &= ~SDF_WRITEPROT;
if ((flag & FWRITE) == 0)
return EBADF;
if (*(int *)addr)
sd->flags |= SDF_WLABEL;
else
sd->flags &= ~SDF_WLABEL;
return 0;
case DIOCWDINFO:
sd->flags &= ~SDF_WRITEPROT;
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(&sd->sc_dk.dk_label,
(struct disklabel *)addr,
/*(sd->flags & SDF_BSDLABEL) ? sd->sc_dk.dk_openmask : */0,
&sd->sc_dk.dk_cpulabel);
if (error == 0) {
sd->flags |= SDF_BSDLABEL;
/* simulate opening partition 0 so write succeeds */
sd->sc_dk.dk_openmask |= (1 << 0); /* XXX */
error = writedisklabel(SDLABELDEV(dev), sdstrategy,
&sd->sc_dk.dk_label, &sd->sc_dk.dk_cpulabel);
sd->sc_dk.dk_openmask =
sd->sc_dk.dk_copenmask | sd->sc_dk.dk_bopenmask;
}
return error;
default:
if (part != RAW_PART)
return ENOTTY;
return scsi_do_ioctl(sd->sc_link, dev, cmd, addr, flag);
}
#ifdef DIAGNOSTIC
panic("sdioctl: impossible");
#endif
}
/*
* Load the label information on the named device
*/
int
sdgetdisklabel(sd)
struct sd_data *sd;
{
char *errstring;
/*
* If the inflo is already loaded, use it
*/
if (sd->flags & SDF_BSDLABEL)
return 0;
bzero(&sd->sc_dk.dk_label, sizeof(struct disklabel));
bzero(&sd->sc_dk.dk_cpulabel, sizeof(struct cpu_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->sc_dk.dk_label.d_partitions[0].p_offset = 0;
sd->sc_dk.dk_label.d_partitions[0].p_size =
sd->params.disksize * (sd->params.blksize / DEV_BSIZE);
sd->sc_dk.dk_label.d_partitions[0].p_fstype = 9; /* XXXX */
sd->sc_dk.dk_label.d_partitions[RAW_PART].p_offset = 0;
sd->sc_dk.dk_label.d_partitions[RAW_PART].p_size =
sd->params.disksize * (sd->params.blksize / DEV_BSIZE);
sd->sc_dk.dk_label.d_npartitions = MAXPARTITIONS;
sd->sc_dk.dk_label.d_secsize = sd->params.blksize;
sd->sc_dk.dk_label.d_ntracks = sd->params.heads;
sd->sc_dk.dk_label.d_nsectors = sd->params.sectors;
sd->sc_dk.dk_label.d_ncylinders = sd->params.cyls;
sd->sc_dk.dk_label.d_secpercyl = sd->params.heads * sd->params.sectors;
if (sd->sc_dk.dk_label.d_secpercyl == 0) {
sd->sc_dk.dk_label.d_secpercyl = 100;
/* as long as it's not 0 - readdisklabel divides by it (?) */
}
/*
* Call the generic disklabel extraction routine
*/
if (errstring = readdisklabel(MAKESDDEV(0, sd->sc_dev.dv_unit,
RAW_PART), sdstrategy, &sd->sc_dk.dk_label,
&sd->sc_dk.dk_cpulabel)) {
printf("%s: %s\n", sd->sc_dev.dv_xname, errstring);
return ENXIO;
}
sd->flags |= SDF_BSDLABEL; /* WE HAVE IT ALL NOW */
return 0;
}
/*
* Find out from the device what it's capacity is
*/
u_int32
sd_size(sd, flags)
struct sd_data *sd;
int 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->sc_link, (struct scsi_generic *)&scsi_cmd,
sizeof(scsi_cmd), (u_char *)&rdcap, sizeof(rdcap), SDRETRIES,
2000, NULL, flags | SCSI_DATA_IN) != 0) {
printf("%s: could not get size\n", sd->sc_dev.dv_xname);
return 0;
} else {
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_data *sd;
int 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->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_data *sd;
int flags;
{
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),
SDRETRIES, 6000, NULL, flags | SCSI_DATA_IN) != 0) {
printf("%s: could not mode sense (4)", sd->sc_dev.dv_xname);
fake_it:
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(sd, flags);
disk_parms->heads = 64;
disk_parms->sectors = 32;
disk_parms->cyls = sectors / (64 * 32);
disk_parms->blksize = 512;
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->blksize = _3btol(scsi_sense.blk_desc.blklen);
if (!disk_parms->heads || !disk_parms->cyls ||
!disk_parms->blksize) {
printf("%s: mode sense (4) returned nonsense",
sd->sc_dev.dv_xname);
goto fake_it;
}
sectors = sd_size(sd, flags);
disk_parms->disksize = sectors;
sectors /= (disk_parms->heads * disk_parms->cyls);
disk_parms->sectors = sectors; /* XXX dubious on SCSI */
}
sd->sc_link->flags |= SDEV_MEDIA_LOADED;
return 0;
}
int
sdsize(dev_t dev)
{
int unit = SDUNIT(dev), part = SDPART(dev), val;
struct sd_data *sd;
if (unit >= sdcd.cd_ndevs)
return -1;
sd = sdcd.cd_devs[unit];
if (!sd)
return -1;
if ((sd->flags & SDF_BSDLABEL) == 0) {
val = sdopen(MAKESDDEV(major(dev), unit, RAW_PART), FREAD,
S_IFBLK, 0);
if (val != 0)
return -1;
}
if (sd->flags & SDF_WRITEPROT)
return -1;
return sd->sc_dk.dk_label.d_partitions[part].p_size;
}
#define SCSIDUMP 1
#undef SCSIDUMP
#define NOT_TRUSTED 1
#ifdef SCSIDUMP
#include <vm/vm.h>
static struct scsi_xfer sx;
#define MAXTRANSFER 8 /* 1 page at a time */
/*
* dump all of physical memory into the partition specified, starting
* at offset 'dumplo' into the partition.
*/
int
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;
#define MAPTO CADDR1
extern caddr_t MAPTO; /* map the page we are about to write, here */
struct scsi_xfer *xs = &sx;
int 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 = SDUNIT(dev); /* eventually support floppies? */
part = SDPART(dev); /* file system */
/* check for acceptable drive number */
if (unit >= sdcd.cd_ndevs)
return ENXIO;
sd = sd_data[unit];
if (!sd)
return ENXIO;
if (sd->sc_link->flags & SDEV_MEDIA_LOADED != SDEV_MEDIA_LOADED)
return ENXIO;
if (sd->flags & SDF_WRITEPROT)
return ENXIO;
/* Convert to disk sectors */
num = (u_int32)num * NBPG / sd->sc_dk.dk_label.d_secsize;
/* check if controller active */
if (sddoingadump)
return EFAULT;
nblocks = sd->sc_dk.dk_label.d_partitions[part].p_size;
blkoff = sd->sc_dk.dk_label.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) {
pmap_enter(kernel_pmap,
MAPTO,
trunc_page(addr),
VM_PROT_READ,
TRUE);
#ifndef NOT_TRUSTED
/*
* 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 = SDRETRIES;
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 *) MAPTO;
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! */
}
#else /* NOT_TRUSTED */
/* lets just talk about this first... */
printf("sd%d: dump addr 0x%x, blk %d\n", unit, addr, blknum);
#endif /* NOT_TRUSTED */
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;
}
#else /* SCSIDUMP */
int
sddump()
{
printf("\nsddump() -- not implemented\n");
delay(60000000); /* 60 seconds */
return -1;
}
#endif /* SCSIDUMP */
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