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freebsd-nq/sys/scsi/od.c

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/*
* Copyright (c) 1995,1996 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 Shunsuke Akiyama 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 1.36 1998/04/15 17:47:18 bde Exp $
*/
/*
* Compile option defines:
*/
/*
* If drive returns sense key as 0x02 with vendor specific additional
* sense code (ASC) and additional sense code qualifier (ASCQ), or
* illegal ASC and ASCQ. This cause an error (NOT READY) and retrying.
* To suppress this, uncomment following.
* Or put "options OD_BOGUS_NOT_READY" entry into your kernel
* configuration file.
*
#define OD_BOGUS_NOT_READY
*/
/*
* For an automatic spindown, try this. Again, preferrably as an
* option in your config file.
* WARNING! Use at your own risk. Joerg's ancient SONY SMO drive
* groks it fine, while Shunsuke's Fujitsu chokes on it and times
* out.
#define OD_AUTO_TURNOFF
*/
#include "opt_bounce.h"
#include "opt_devfs.h"
#include "opt_scsi.h"
#include "opt_od.h"
#define SPLOD splbio
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/dkbad.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/buf.h>
#include <sys/cdio.h>
#include <sys/dkstat.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#include <scsi/scsi_debug.h>
#include <scsi/scsi_driver.h>
static u_int32_t odstrats, odqueues;
#define SECSIZE 512 /* default sector size */
#define ODOUTSTANDING 4
#define OD_RETRIES 4
#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)))
struct scsi_data {
u_int32_t flags;
#define ODINIT 0x04 /* device has been init'd */
struct disk_parms {
u_char heads; /* Number of heads */
u_int16_t cyls; /* Number of cylinders (ficticous) */
u_int16_t sectors; /* Number of sectors/track */
u_int16_t secsiz; /* Number of bytes/sector */
u_int32_t disksize; /* total number sectors */
u_int16_t rpm; /* medium rotation rate */
} params;
struct diskslices *dk_slices; /* virtual drives */
struct buf_queue_head buf_queue;
int dkunit; /* disk stats unit number */
#ifdef DEVFS
/* Eventually move all these to common disk struct. */
void *b_devfs_token;
void *c_devfs_token;
void *ctl_devfs_token;
#endif
};
static errval od_get_parms __P((int unit, int flags));
#ifdef notyet
static errval od_reassign_blocks __P((int unit, int block));
#endif
static u_int32_t od_size __P((int unit, int flags));
static int od_sense_handler __P((struct scsi_xfer *));
static void odstart __P((u_int32_t, u_int32_t));
static void odstrategy1 __P((struct buf *));
static dev_t odsetunit(dev_t dev, int unit) { return ODSETUNIT(dev, unit); }
static int odunit(dev_t dev) { return ODUNIT(dev); }
static errval od_open __P((dev_t dev, int mode, int fmt, struct proc *p,
struct scsi_link *sc_link));
static errval od_ioctl(dev_t dev, int cmd, caddr_t addr, int flag,
struct proc *p, struct scsi_link *sc_link);
static errval od_close __P((dev_t dev, int fflag, int fmt, struct proc *p,
struct scsi_link *sc_link));
static 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_strategy_t odstrategy;
#define CDEV_MAJOR 70
#define BDEV_MAJOR 20
static struct cdevsw od_cdevsw;
static struct bdevsw od_bdevsw =
{ odopen, odclose, odstrategy, odioctl, /*20*/
nodump, nopsize, D_DISK, "od", &od_cdevsw, -1 };
/*
* Actually include the interface routines
*/
SCSI_DEVICE_ENTRIES(od)
static 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 __inline void
od_registerdev(int unit)
{
if(dk_ndrive < DK_NDRIVE) {
sprintf(dk_names[dk_ndrive], "od%d", unit);
dk_wpms[dk_ndrive] = (4*1024*1024/2); /* 4MB/sec */
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.
*/
static errval
odattach(struct scsi_link *sc_link)
{
u_int32_t unit;
struct disk_parms *dp;
#ifdef DEVFS
int mynor;
#endif
struct scsi_data *od = sc_link->sd;
unit = sc_link->dev_unit;
dp = &(od->params);
if (sc_link->opennings > ODOUTSTANDING)
sc_link->opennings = ODOUTSTANDING;
bufq_init(&od->buf_queue);
/*
* Use the subdriver to request information regarding
* the drive. We cannot use interrupts yet, so the
* request must specify this.
*/
scsi_start_unit(sc_link, SCSI_NOSLEEP | SCSI_NOMASK
| SCSI_ERR_OK | SCSI_SILENT);
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 approximate %d cyls, %d heads, and %d sectors/track",
dp->cyls, dp->heads, dp->sectors);
}
#ifdef OD_AUTO_TURNOFF
scsi_stop_unit(sc_link, 0, SCSI_ERR_OK | SCSI_SILENT);
#endif /* OD_AUTO_TURNOFF */
od->flags |= ODINIT;
od_registerdev(unit);
#ifdef DEVFS
mynor = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
od->b_devfs_token = devfs_add_devswf(&od_bdevsw, mynor, DV_BLK,
UID_ROOT, GID_OPERATOR, 0640,
"od%d", unit);
od->c_devfs_token = devfs_add_devswf(&od_cdevsw, mynor, DV_CHR,
UID_ROOT, GID_OPERATOR, 0640,
"rod%d", unit);
mynor = dkmakeminor(unit, 0, 0); /* XXX */
od->ctl_devfs_token = devfs_add_devswf(&od_cdevsw,
mynor | SCSI_CONTROL_MASK,
DV_CHR,
UID_ROOT, GID_WHEEL, 0600,
"rod%d.ctl", unit);
#endif
return 0;
}
/*
* open the device. Make sure the partition info is a up-to-date as can be.
*/
static 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_t 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)));
/*
* Try to start the drive, and try to clear "Unit Attention"
* condition, when media had been changed before.
* This operation also clears the SDEV_MEDIA_LOADED flag in its
* error handling routine.
*/
scsi_start_unit(sc_link, SCSI_SILENT);
scsi_prevent(sc_link, PR_PREVENT, SCSI_ERR_OK | SCSI_SILENT);
/*
* Make sure the drive is ready.
*/
scsi_test_unit_ready(sc_link, 0);
SC_DEBUG(sc_link, SDEV_DB3, ("'start' attempted "));
sc_link->flags |= SDEV_OPEN; /* unit attn becomes an err now */
/*
* If it's been invalidated, then forget the label.
*/
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"));
/*
* Load the physical device parameters
*/
errcode = od_get_parms(unit, 0); /* sets SDEV_MEDIA_LOADED */
if (errcode) {
goto bad;
}
switch (od->params.secsiz) {
case SECSIZE :
case 1024 :
case 2048 :
break;
default :
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;
label.d_rpm = od->params.rpm; /* maybe wrong */
if (label.d_secpercyl == 0)
label.d_secpercyl = 64*32;
/* 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, &od_bdevsw, &od_cdevsw);
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);
#ifdef OD_AUTO_TURNOFF
scsi_stop_unit(sc_link, 0, SCSI_ERR_OK | SCSI_SILENT);
#endif /* OD_AUTO_TURNOFF */
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.
*/
static 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);
#ifdef OD_AUTO_TURNOFF
scsi_stop_unit(sc_link, 0, SCSI_ERR_OK | SCSI_SILENT);
#endif /* OD_AUTO_TURNOFF */
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.
*/
static void
od_strategy(struct buf *bp, struct scsi_link *sc_link)
{
u_int32_t opri;
struct scsi_data *od;
u_int32_t unit;
int secsize;
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 or negative offset
*/
if (bp->b_blkno < 0 ) {
bp->b_error = EINVAL;
printf("od_strategy: Negative block number: 0x%x\n", bp->b_blkno);
goto bad;
}
secsize = od->params.secsiz;
/* make sure the blkno is scalable */
if( (bp->b_blkno % (secsize/DEV_BSIZE)) != 0 ) {
bp->b_error = EINVAL;
printf("od_strategy: Block number is not multiple of sector size (2): 0x%x\n", bp->b_blkno);
goto bad;
}
/* make sure that the transfer size is a multiple of the sector size */
if( (bp->b_bcount % secsize) != 0 ) {
bp->b_error = EINVAL;
printf("od_strategy: Invalid b_bcount %d at block number: 0x%x\n", bp->b_bcount, bp->b_blkno);
goto bad;
}
/*
* Do bounds checking, adjust transfer, and set b_pblkno.
*/
{
int status;
int sec_blk_ratio = secsize/DEV_BSIZE;
/* save original block number and size */
int b_blkno = bp->b_blkno;
int b_bcount = bp->b_bcount;
/* replace with scaled values */
bp->b_blkno /= sec_blk_ratio;
bp->b_bcount /= sec_blk_ratio;
/* have dscheck enforce limits and map to physical block number */
status = dscheck(bp, od->dk_slices);
/* restore original values to prevent bad side effects in block system */
bp->b_blkno = b_blkno;
bp->b_bcount = b_bcount;
/* scale resid */
bp->b_resid *= sec_blk_ratio;
/* see if the mapping failed */
if (status <= 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
*/
bufq_insert_tail(&od->buf_queue, bp);
/*
* 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
*/
static void
odstart(u_int32_t unit, u_int32_t 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_t blkno, nblk;
u_int32_t secsize;
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 = bufq_first(&od->buf_queue);
if (bp == NULL) { /* yes, an assign */
return;
}
bufq_remove(&od->buf_queue, bp);
/*
* 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..
*/
secsize = od->params.secsiz;
blkno = bp->b_pblkno;
if (bp->b_bcount & (secsize - 1))
{
goto bad;
}
nblk = bp->b_bcount / secsize;
/*
* Fill out the scsi command
*/
cmd.op_code = (bp->b_flags & B_READ)
? READ_BIG : WRITE_BIG;
scsi_uto4b(blkno, &cmd.addr_3);
scsi_uto2b(nblk, &cmd.length2);
cmd.byte2 = cmd.reserved = cmd.control = 0;
/*
* 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,
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
*/
static 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 the device is not valid.. abandon ship
*/
if (!(sc_link->flags & SDEV_MEDIA_LOADED))
return EIO;
switch (cmd) {
case DIOCSBAD:
error = EINVAL;
break;
case CDIOCEJECT:
error = scsi_stop_unit(sc_link, 1, 0);
sc_link->flags &= ~SDEV_MEDIA_LOADED;
break;
case CDIOCALLOW:
error = scsi_prevent(sc_link, PR_ALLOW, 0);
break;
case CDIOCPREVENT:
error = scsi_prevent(sc_link, PR_PREVENT, 0);
break;
default:
error = dsioctl("od", dev, cmd, addr, flag, &od->dk_slices,
odstrategy1, (ds_setgeom_t *)NULL);
if (error == ENOIOCTL) {
if (PARTITION(dev) != RAW_PART) {
error = ENOTTY;
} else {
error = scsi_do_ioctl(dev, cmd, addr,
flag, p, sc_link);
}
}
break;
}
return error;
}
/*
* Find out from the device what its capacity is
*/
static u_int32_t
od_size(unit, flags)
int unit, flags;
{
struct scsi_read_cap_data rdcap;
struct scsi_read_capacity rdcap_cmd;
struct scsi_link *sc_link = SCSI_LINK(&od_switch, unit);
struct scsi_data *od = sc_link->sd;
struct scsi_mode_sense mdsense_cmd;
struct scsi_mode_sense_data {
struct scsi_mode_header header;
struct blk_desc blk_desc;
union disk_pages pages;
} scsi_sense;
/*
* make up a scsi command and ask the scsi driver to do
* it for you.
*/
bzero(&rdcap_cmd, sizeof(rdcap_cmd));
rdcap_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 *) &rdcap_cmd,
sizeof(rdcap_cmd),
(u_char *) & rdcap,
sizeof(rdcap),
OD_RETRIES,
10000,
NULL,
flags | SCSI_DATA_IN) != 0) {
return 0;
} else {
od->params.disksize = scsi_4btou(&rdcap.addr_3) + 1;
od->params.secsiz = scsi_4btou(&rdcap.length_3);
}
/*
* do a "mode sense page 4" (rigid disk drive geometry)
*/
bzero(&mdsense_cmd, sizeof(mdsense_cmd));
mdsense_cmd.op_code = MODE_SENSE;
mdsense_cmd.page = 4;
mdsense_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 *) &mdsense_cmd,
sizeof(mdsense_cmd),
(u_char *) & scsi_sense,
sizeof(scsi_sense),
OD_RETRIES,
10000,
NULL,
flags | SCSI_SILENT | SCSI_DATA_IN) != 0) {
/* default to a ficticous geometry */
od->params.heads = 64;
} else {
SC_DEBUG(sc_link, SDEV_DB3,
("%ld cyls, %d heads, %d rpm\n",
scsi_3btou(&scsi_sense.pages.rigid_geometry.ncyl_2),
scsi_sense.pages.rigid_geometry.nheads,
scsi_2btou(&scsi_sense.pages.rigid_geometry.medium_rot_rate_1)));
od->params.heads = scsi_sense.pages.rigid_geometry.nheads;
if (od->params.heads == 0)
od->params.heads = 64; /* ficticous */
od->params.rpm =
scsi_2btou(&scsi_sense.pages.rigid_geometry.medium_rot_rate_1);
}
/*
* do a "mode sense page 3" (format device)
*/
bzero(&mdsense_cmd, sizeof(mdsense_cmd));
mdsense_cmd.op_code = MODE_SENSE;
mdsense_cmd.page = 3;
mdsense_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 *) &mdsense_cmd,
sizeof(mdsense_cmd),
(u_char *) & scsi_sense,
sizeof(scsi_sense),
OD_RETRIES,
10000,
NULL,
flags | SCSI_SILENT | SCSI_DATA_IN) != 0) {
/* default to a ficticous geometry */
od->params.sectors = 32;
} else {
SC_DEBUG(sc_link, SDEV_DB3,
("%d secs\n",
scsi_2btou(&scsi_sense.pages.disk_format.ph_sec_t_1)));
od->params.sectors =
scsi_2btou(&scsi_sense.pages.disk_format.ph_sec_t_1);
if (od->params.sectors == 0)
od->params.sectors = 32; /* ficticous */
}
return od->params.disksize;
}
#ifdef notyet
/*
* Tell the device to map out a defective block
*/
static 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]);
scsi_uto4b(block, &rbdata.defect_descriptor[0].dlbaddr_3);
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);
}
#endif
/*
* Get the scsi driver to send a full inquiry to the
* device and use the results to fill out the disk
* parameter structure.
*/
static 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_t sectors;
errval retval;
/*
* First check if we have it all loaded
*/
if (sc_link->flags & SDEV_MEDIA_LOADED)
return 0;
/*
* Use ficticious geometry, this depends on the size of medium.
*/
sectors = od_size(unit, flags);
/* od_size() sets secsiz, disksize, sectors, and heads */
/* ficticous number of cylinders, so that C*H*S <= total */
if (disk_parms->sectors != 0 && disk_parms->heads != 0) {
disk_parms->cyls =
sectors / (disk_parms->sectors * disk_parms->heads);
} else {
disk_parms->cyls = 0;
}
if (sectors != 0) {
sc_link->flags |= SDEV_MEDIA_LOADED;
retval = 0;
} else {
retval = ENXIO;
}
return retval;
}
/*
* sense handler: Called to determine what to do when the
* device returns a CHECK CONDITION.
*/
static 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;
#ifdef OD_BOGUS_NOT_READY
if (((sense->error_code & SSD_ERRCODE) == 0x70) &&
((sense->ext.extended.flags & SSD_KEY) == 0x02))
/* No point in retrying Not Ready */
return SCSIRET_CONTINUE;
#endif
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)
{
if( ! od_devsw_installed ) {
bdevsw_add_generic(BDEV_MAJOR, CDEV_MAJOR, &od_bdevsw);
od_devsw_installed = 1;
}
}
SYSINIT(oddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,od_drvinit,NULL)
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