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freebsd-skq/sys/scsi/od.c

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/*
* Copyright (c) 1995 Shunsuke Akiyama. 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 Shunsuke Akiyama.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Shunsuke Akiyama AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: od.c,v 1.6 1995/12/08 11:18:45 julian Exp $
*/
/*
* TODO:
* 1. Add optical disk specific ioctl functions, such as eject etc.
*/
#define SPLOD 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>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#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>
u_int32 odstrats, odqueues;
#define SECSIZE 512
#define ODOUTSTANDING 4
#define OD_RETRIES 4
#define MAXTRANSFER 8 /* 1 page at a time */
#define PARTITION(dev) dkpart(dev)
#define ODUNIT(dev) dkunit(dev)
/* XXX introduce a dkmodunit() macro for this. */
#define ODSETUNIT(DEV, U) \
makedev(major(DEV), dkmakeminor((U), dkslice(DEV), dkpart(DEV)))
errval od_get_parms __P((int unit, int flags));
static void odstrategy1 __P((struct buf *));
int od_sense_handler __P((struct scsi_xfer *));
void odstart __P((u_int32, u_int32));
struct scsi_data {
u_int32 flags;
#define ODINIT 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_queue_head buf_queue;
int dkunit; /* disk stats unit number */
#ifdef DEVFS
void *b_devfs_token; /*eventually move to common disk struct */
void *c_devfs_token; /*eventually move to common disk struct */
#endif
};
static int odunit(dev_t dev) { return ODUNIT(dev); }
static dev_t odsetunit(dev_t dev, int unit) { return ODSETUNIT(dev, unit); }
errval od_open __P((dev_t dev, int mode, int fmt, struct proc *p,
struct scsi_link *sc_link));
errval od_ioctl(dev_t dev, int cmd, caddr_t addr, int flag,
struct proc *p, struct scsi_link *sc_link);
errval od_close __P((dev_t dev, int fflag, int fmt, struct proc *p,
struct scsi_link *sc_link));
void od_strategy(struct buf *bp, struct scsi_link *sc_link);
static d_open_t odopen;
static d_close_t odclose;
static d_ioctl_t odioctl;
static d_psize_t odsize;
static d_strategy_t odstrategy;
#define CDEV_MAJOR 70
#define BDEV_MAJOR 20
extern struct cdevsw od_cdevsw;
static struct bdevsw od_bdevsw =
{ odopen, odclose, odstrategy, odioctl, /*20*/
nxdump, odsize, 0, "od", &od_cdevsw, -1 };
static struct cdevsw od_cdevsw =
{ odopen, odclose, rawread, rawwrite, /*70*/
odioctl, nostop, nullreset, nodevtotty,
seltrue, nommap, odstrategy, "od",
&od_bdevsw, -1 };
/*
* Actually include the interface routines
*/
SCSI_DEVICE_ENTRIES(od)
struct scsi_device od_switch =
{
od_sense_handler,
odstart, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"od",
0,
{0, 0},
0, /* Link flags */
odattach,
"Optical",
odopen,
sizeof(struct scsi_data),
T_OPTICAL,
odunit,
odsetunit,
od_open,
od_ioctl,
od_close,
od_strategy,
};
static struct scsi_xfer sx;
static int
od_externalize(struct kern_devconf *kdc, struct sysctl_req *req)
{
return scsi_externalize(SCSI_LINK(&od_switch, kdc->kdc_unit), req);
}
static struct kern_devconf kdc_od_template = {
0, 0, 0, /* filled in by dev_attach */
"od", 0, MDDC_SCSI,
od_externalize, 0, scsi_goaway, SCSI_EXTERNALLEN,
&kdc_scbus0, /* XXX parent */
0, /* parentdata */
DC_UNKNOWN, /* not supported */
};
static inline void
od_registerdev(int unit)
{
struct kern_devconf *kdc;
MALLOC(kdc, struct kern_devconf *, sizeof *kdc, M_TEMP, M_NOWAIT);
if(!kdc) return;
*kdc = kdc_od_template;
kdc->kdc_unit = unit;
kdc->kdc_description = od_switch.desc;
dev_attach(kdc);
if(dk_ndrive < DK_NDRIVE) {
sprintf(dk_names[dk_ndrive], "od%d", unit);
dk_wpms[dk_ndrive] = (8*1024*1024/2);
SCSI_DATA(&od_switch, unit)->dkunit = dk_ndrive++;
} else {
SCSI_DATA(&od_switch, unit)->dkunit = -1;
}
}
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
errval
odattach(struct scsi_link *sc_link)
{
u_int32 unit;
struct disk_parms *dp;
char name[32];
struct scsi_data *od = sc_link->sd;
unit = sc_link->dev_unit;
dp = &(od->params);
if (sc_link->opennings > ODOUTSTANDING)
sc_link->opennings = ODOUTSTANDING;
TAILQ_INIT(&od->buf_queue);
/*
* Use the subdriver to request information regarding
* the drive. We cannot use interrupts yet, so the
* request must specify this.
*/
od_get_parms(unit, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT);
/*
* 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;
if (dp->disksize != 0) {
printf("%ldMB (%ld %d byte sectors)",
dp->disksize / ((1024L * 1024L) / dp->secsiz),
dp->disksize,
dp->secsiz);
} else {
printf("od not present");
}
#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);
}
od->flags |= ODINIT;
od_registerdev(unit);
#ifdef DEVFS
/* FIX PROPERLY WHEN DISKSLICE CODE IS UNDERSTOOD */
sprintf(name, "rod%d", unit);
od->c_devfs_token = devfs_add_devsw( "/", name, &od_cdevsw, 0,
DV_CHR, 0, 0, 0600);
sprintf(name, "od%d", unit);
od->b_devfs_token = devfs_add_devsw( "/", name, &od_bdevsw, 0,
DV_BLK, 0, 0, 0600);
#endif
return 0;
}
/*
* open the device. Make sure the partition info is a up-to-date as can be.
*/
errval
od_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 *od;
unit = ODUNIT(dev);
od = sc_link->sd;
/*
* Make sure the disk has been initialized
* At some point in the future, get the scsi driver
* to look for a new device if we are not initted
*/
if ((!od) || (!(od->flags & ODINIT))) {
return (ENXIO);
}
SC_DEBUG(sc_link, SDEV_DB1,
("od_open: dev=0x%lx (unit %ld, partition %d)\n",
dev, unit, PARTITION(dev)));
/*
* Check that it is still responding and ok. if the media has
* been changed this will result in a "unit attention" error
* which the error code will disregard because the SDEV_OPEN
* or SDEV_MEDIA_LOADED flag is not yet set. Makes sure that
* we know it if the media has been changed..
*/
scsi_test_unit_ready(sc_link, SCSI_SILENT);
/*
* 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(od->dk_slices)) {
errcode = ENXIO;
goto bad;
}
if (od->dk_slices != NULL)
dsgone(&od->dk_slices);
}
/*
* This time actually take notice of error returns
*/
if (scsi_test_unit_ready(sc_link, SCSI_SILENT) != 0) {
SC_DEBUG(sc_link, SDEV_DB3, ("not ready\n"));
errcode = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("device present\n"));
/*
* 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);
scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT);
SC_DEBUG(sc_link, SDEV_DB3, ("'start' attempted "));
/*
* Load the physical device parameters
*/
errcode = od_get_parms(unit, 0); /* sets SDEV_MEDIA_LOADED */
if (errcode) {
goto bad;
}
if (od->params.secsiz != SECSIZE) { /* XXX One day... */
printf("od%ld: Can't deal with %d bytes logical blocks\n",
unit, od->params.secsiz);
Debugger("od");
errcode = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("params loaded "));
/* Build label for whole disk. */
bzero(&label, sizeof label);
label.d_secsize = od->params.secsiz;
label.d_nsectors = od->params.sectors;
label.d_ntracks = od->params.heads;
label.d_ncylinders = od->params.cyls;
label.d_secpercyl = od->params.heads * od->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 = od->params.disksize;
/* Initialize slice tables. */
errcode = dsopen("od", dev, fmt, &od->dk_slices, &label, odstrategy1,
(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", odstrats, odqueues));
return 0;
bad:
if (!dsisopen(od->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
od_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 *od;
od = sc_link->sd;
dsclose(dev, fmt, od->dk_slices);
if (!dsisopen(od->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
od_strategy(struct buf *bp, struct scsi_link *sc_link)
{
u_int32 opri;
struct scsi_data *od;
u_int32 unit;
odstrats++;
unit = ODUNIT((bp->b_dev));
od = 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, od->dk_slices) <= 0)
goto done; /* XXX check b_resid */
opri = SPLOD();
/*
* 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
*/
TAILQ_INSERT_TAIL(&od->buf_queue, bp, b_act);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
*/
odstart(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
odstrategy1(struct buf *bp)
{
/*
* XXX - do something to make odstrategy() but not this block while
* we're doing dsinit() and dsioctl().
*/
odstrategy(bp);
}
/*
* odstart 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 (odstrategy)
*
* 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
* odstart() is called at SPLOD from odstrategy and scsi_done
*/
void
odstart(u_int32 unit, u_int32 flags)
{
register struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit);
register struct scsi_data *od = sc_link->sd;
struct buf *bp = 0;
struct scsi_rw_big cmd;
u_int32 blkno, nblk;
SC_DEBUG(sc_link, SDEV_DB2, ("odstart "));
/*
* 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..
*/
bp = od->buf_queue.tqh_first;
if (bp == NULL) { /* yes, an assign */
return;
}
TAILQ_REMOVE( &od->buf_queue, bp, b_act);
/*
* 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,
OD_RETRIES,
100000,
bp,
flags | ((bp->b_flags & B_READ) ?
SCSI_DATA_IN : SCSI_DATA_OUT))
== SUCCESSFULLY_QUEUED) {
odqueues++;
if(od->dkunit >= 0) {
dk_xfer[od->dkunit]++;
dk_seek[od->dkunit]++; /* don't know */
dk_wds[od->dkunit] += bp->b_bcount >> 6;
}
} else {
bad:
printf("od%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
od_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p,
struct scsi_link *sc_link)
{
/* struct od_cmd_buf *args; */
errval error;
struct scsi_data *od;
/*
* Find the device that the user is talking about
*/
od = sc_link->sd;
SC_DEBUG(sc_link, SDEV_DB1, ("odioctl (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("od", dev, cmd, addr, flag, &od->dk_slices,
odstrategy1, (ds_setgeom_t *)NULL);
if (error != -1)
return (error);
if (PARTITION(dev) != RAW_PART)
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
od_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(&od_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),
OD_RETRIES,
20000,
NULL,
flags | SCSI_DATA_IN) != 0) {
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
od_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(&od_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),
OD_RETRIES,
20000,
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
od_get_parms(unit, flags)
int unit, flags;
{
struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit);
struct scsi_data *od = sc_link->sd;
struct disk_parms *disk_parms = &od->params;
u_int32 sectors;
errval retval;
/*
* First check if we have it all loaded
*/
if (sc_link->flags & SDEV_MEDIA_LOADED)
return 0;
/*
* use adaptec standard ficticious geometry
* this depends on which controller (e.g. 1542C is
* different. but we have to put SOMETHING here..)
*/
sectors = od_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;
if (sectors != 0) {
sc_link->flags |= SDEV_MEDIA_LOADED;
retval = 0;
} else {
retval = ENXIO;
}
return retval;
}
int
odsize(dev_t dev)
{
return -1;
}
/*
* sense handler: Called to determine what to do when the
* device returns a CHECK CONDITION.
*/
int
od_sense_handler(struct scsi_xfer *xs)
{
struct scsi_sense_data *sense;
struct scsi_sense_extended *ext;
int asc, ascq;
sense = &(xs->sense);
ext = (struct scsi_sense_extended *)&(sense->ext.extended);
/* 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) == 0x04))
/* No point in retrying Hardware Failure */
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;
asc = (ext->extra_len >= 5) ? ext->add_sense_code : 0;
ascq = (ext->extra_len >= 6) ? ext->add_sense_code_qual : 0;
if (asc == 0x11 || asc == 0x30 || asc == 0x31 || asc == 0x53
|| asc == 0x5a) {
/* Unrecovered errors */
return SCSIRET_CONTINUE;
}
if (asc == 0x21 && ascq == 0) {
/* Logical block address out of range */
return SCSIRET_CONTINUE;
}
if (asc == 0x27 && ascq == 0) {
/* Write protected */
return SCSIRET_CONTINUE;
}
if (asc == 0x28 && ascq == 0) {
/* Not ready to ready transition */
/* (medium may have changed) */
return SCSIRET_CONTINUE;
}
if (asc == 0x3a && ascq == 0) {
/* Medium not present */
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;
}
static od_devsw_installed = 0;
static void od_drvinit(void *unused)
{
dev_t dev;
if( ! od_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&od_cdevsw, NULL);
dev = makedev(BDEV_MAJOR, 0);
bdevsw_add(&dev,&od_bdevsw, NULL);
od_devsw_installed = 1;
}
}
SYSINIT(oddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,od_drvinit,NULL)
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