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GNU Mach 1.0
/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or [email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: rz_disk.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 10/90
*
* Top layer of the SCSI driver: interface with the MI.
* This file contains operations specific to disk-like devices.
*
* Modified by Kevin T. Van Maren to use a common partition code
* with the ide driver, and support 'slices'.
*/
#include <scsi/scsi.h>
#if (NSCSI > 0)
#include <device/buf.h>
#include <device/disk_status.h>
#include <device/device_types.h>
#include <device/param.h>
#include <device/errno.h>
#include <kern/time_out.h>
#include <machine/machspl.h> /* spl definitions */
#include <mach/std_types.h>
#include <platforms.h>
#include <scsi/compat_30.h>
#include <scsi/scsi.h>
#include <scsi/scsi_defs.h>
#include <scsi/rz.h>
#include <scsi/rz_labels.h>
#ifdef MACH_KERNEL
#else /*MACH_KERNEL*/
#include <sys/kernel.h> /* for hz */
#endif /*MACH_KERNEL*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include "vm_param.h"
#include <vm/vm_kern.h>
#include <vm/pmap.h>
extern void scdisk_read(), scdisk_write(),
scsi_long_read(), scsi_long_write();
void scdisk_start(); /* forwards */
void scdisk_start_rw();
unsigned dkcksum();
#if 0
struct diskpart scsi_array[8*64];
#endif 0
/* THIS IS THE BOTTOM LAYER FOR THE SCSI PARTITION CODE */
typedef struct scsi_driver_info {
target_info_t *tgt;
io_req_t ior;
void (*readfun)();
int sectorsize;
} scsi_driver_info;
int scsi_read_fun(scsi_driver_info *param, int sectornum, void *buff)
{
char *psave;
int result = TRUE; /* SUCCESS */
psave=param->ior->io_data; /* is this necessary ? */
param->ior->io_data=buff;
param->ior->io_count = param->sectorsize;
param->ior->io_op = IO_READ;
param->ior->io_error = 0;
param->tgt->ior = param->ior;
(*param->readfun)( param->tgt, sectornum, param->ior);
iowait(param->ior);
param->ior->io_data=psave; /* restore the io_data pointer ?? */
return(result);
}
/*
* Specialized side of the open routine for disks
*/
scsi_ret_t scdisk_open(tgt, req)
target_info_t *tgt;
io_req_t req;
{
register int i, dev_bsize;
scsi_ret_t ret = /* SCSI_RET_SUCCESS; */ -1;
unsigned int disk_size, secs_per_cyl, sector_size;
scsi_rcap_data_t *cap;
struct disklabel *label;
io_req_t ior;
void (*readfun)() = scdisk_read;
char *data = (char *)0;
int numpart;
scsi_driver_info scsi_info;
char drive_name[10]; /* used for disklabel strings */
if (tgt->flags & TGT_ONLINE)
return SCSI_RET_SUCCESS;
/*
* Dummy ior for proper sync purposes
*/
io_req_alloc(ior,0);
ior->io_next = 0;
ior->io_count = 0;
/*
* Set the LBN to DEV_BSIZE with a MODE SELECT.
* If this fails we try a couple other tricks.
*/
dev_bsize = 0;
for (i = 0; i < 5; i++) {
ior->io_op = IO_INTERNAL;
ior->io_error = 0;
ret = scdisk_mode_select(tgt, DEV_BSIZE, ior, 0, 0, 0);
if (ret == SCSI_RET_SUCCESS) {
dev_bsize = DEV_BSIZE;
break;
}
if (ret == SCSI_RET_RETRY) {
timeout(wakeup, tgt, 2*hz);
await(tgt);
}
if (ret == SCSI_RET_DEVICE_DOWN)
goto done;
}
#if 0
if (ret != SCSI_RET_SUCCESS) {
scsi_error( tgt, SCSI_ERR_MSEL, ret, 0);
ret = D_INVALID_SIZE;
goto done;
}
#endif
/*
* Do a READ CAPACITY to get max size. Check LBN too.
*/
for (i = 0; i < 5; i++) {
ior->io_op = IO_INTERNAL;
ior->io_error = 0;
ret = scsi_read_capacity(tgt, 0, ior);
if (ret == SCSI_RET_SUCCESS)
break;
}
if (ret == SCSI_RET_SUCCESS) {
int val;
cap = (scsi_rcap_data_t*) tgt->cmd_ptr;
disk_size = (cap->lba1<<24) |
(cap->lba2<<16) |
(cap->lba3<< 8) |
cap->lba4;
if (scsi_debug)
printf("rz%d holds %d blocks\n", tgt->unit_no, disk_size);
val = (cap->blen1<<24) |
(cap->blen2<<16) |
(cap->blen3<<8 ) |
cap->blen4;
if (dev_bsize == 0)
dev_bsize = val;
else
if (val != dev_bsize) panic("read capacity bad");
if (disk_size > SCSI_CMD_READ_MAX_LBA)
tgt->flags |= TGT_BIG;
} else {
printf("Unknown disk capacity??\n");
disk_size = -1;
}
/*
* Mandatory long-form commands ?
*/
if (BGET(scsi_use_long_form,(unsigned char)tgt->masterno,tgt->target_id))
tgt->flags |= TGT_BIG;
if (tgt->flags & TGT_BIG)
readfun = scsi_long_read;
/*
* Some CDROMS truly dislike 512 as LBN.
* Use a MODE_SENSE to cover for this case.
*/
if (dev_bsize == 0) {
scsi_mode_sense_data_t *m;
ior->io_op = IO_INTERNAL;
ior->io_error = 0;
ret = scsi_mode_sense(tgt, 0/*pagecode*/, 32/*?*/, ior);
if (ret == SCSI_RET_SUCCESS) {
m = (scsi_mode_sense_data_t *) tgt->cmd_ptr;
dev_bsize =
m->bdesc[0].blen_msb << 16 |
m->bdesc[0].blen << 8 |
m->bdesc[0].blen_lsb;
}
}
/*
* Find out about the phys disk geometry -- scsi specific
*/
ior->io_op = IO_INTERNAL;
ior->io_error = 0;
ret = scsi_read_capacity( tgt, 1, ior);
if (ret == SCSI_RET_SUCCESS) {
cap = (scsi_rcap_data_t*) tgt->cmd_ptr;
secs_per_cyl = (cap->lba1<<24) | (cap->lba2<<16) |
(cap->lba3<< 8) | cap->lba4;
secs_per_cyl += 1;
sector_size = (cap->blen1<<24) | (cap->blen2<<16) |
(cap->blen3<<8 ) | cap->blen4;
} else {
sector_size = dev_bsize ? dev_bsize : DEV_BSIZE;
secs_per_cyl = disk_size;
}
if (dev_bsize == 0)
dev_bsize = sector_size;
if (scsi_debug)
printf("rz%d: %d sect/cyl %d bytes/sec\n", tgt->unit_no,
secs_per_cyl, sector_size);
/*
* At this point, one way or other, we are committed to
* a given disk capacity and sector size.
*/
tgt->block_size = dev_bsize;
/*
* Get partition table off pack
*/
#ifdef MACH_KERNEL
ior->io_data = (char *)kalloc(sector_size);
#endif /*MACH_KERNEL*/
scsi_info.tgt=tgt;
scsi_info.ior=ior;
scsi_info.readfun=readfun;
scsi_info.sectorsize=sector_size;
/* label has NOT been allocated space yet! set to the tgt disklabel */
label=&scsi_info.tgt->dev_info.disk.l;
sprintf(drive_name, "sd%d:", tgt->unit_no);
if (scsi_debug)
printf("Using bogus geometry: 32 sectors/track, 64 heads\n");
fudge_bsd_label(label, DTYPE_SCSI, disk_size /* /(32*64)*/ ,
64, 32, sector_size, 8);
numpart=get_only_partition(&scsi_info, (*scsi_read_fun),
tgt->dev_info.disk.scsi_array, MAX_SCSI_PARTS, disk_size, drive_name);
printf("%s %d partitions found\n",drive_name,numpart);
ret=SCSI_RET_SUCCESS; /* if 0, return SCSI_RET_SUCCESS */
done:
io_req_free(ior);
return(ret);
}
/*
* Disk strategy routine
*/
int scdisk_strategy(ior)
register io_req_t ior;
{
target_info_t *tgt;
register scsi_softc_t *sc;
register int i = ior->io_unit, part;
register unsigned rec, max;
spl_t s;
struct diskpart *label;
sc = scsi_softc[rzcontroller(i)];
tgt = sc->target[rzslave(i)];
part = rzpartition(i);
/*
* Validate request
*/
/* readonly ? */
if ((tgt->flags & TGT_READONLY) &&
(ior->io_op & (IO_READ|IO_INTERNAL) == 0)) {
ior->io_error = D_READ_ONLY;
ior->io_op |= IO_ERROR;
ior->io_residual = ior->io_count;
iodone(ior);
return ior->io_error;
}
rec = ior->io_recnum;
label=lookup_part(tgt->dev_info.disk.scsi_array, part);
if (!label) {
if (scsi_debug)
printf("sc strategy -- bad partition\n");
ior->io_error = D_INVALID_SIZE;
ior->io_op |= IO_ERROR;
ior->io_residual = ior->io_count;
iodone(ior);
return ior->io_error;
}
else max=label->size;
if (max == -1) /* what about 0? */
max = tgt->dev_info.disk.l.d_secperunit -
label->start;
i = (ior->io_count + tgt->block_size - 1) / tgt->block_size;
if (((rec + i) > max) || (ior->io_count < 0) ||
#if later
((rec <= LABELSECTOR) && ((tgt->flags & TGT_WRITE_LABEL) == 0))
#else
FALSE
#endif
) {
ior->io_error = D_INVALID_SIZE;
ior->io_op |= IO_ERROR;
ior->io_residual = ior->io_count;
iodone(ior);
return ior->io_error;
}
/*
* Find location on disk: secno and cyl (for disksort)
*/
rec += label->start;
ior->io_residual = rec / tgt->dev_info.disk.l.d_secpercyl;
/*
* Enqueue operation
*/
s = splbio();
simple_lock(&tgt->target_lock);
if (tgt->ior) {
disksort(tgt->ior, ior);
simple_unlock(&tgt->target_lock);
splx(s);
} else {
ior->io_next = 0;
tgt->ior = ior;
simple_unlock(&tgt->target_lock);
splx(s);
scdisk_start(tgt,FALSE);
}
return D_SUCCESS;
}
/*#define CHECKSUM*/
#ifdef CHECKSUM
int max_checksum_size = 0x2000;
#endif CHECKSUM
/*
* Start/completion routine for disks
*/
void scdisk_start(tgt, done)
target_info_t *tgt;
boolean_t done;
{
register io_req_t ior = tgt->ior;
register unsigned part;
#ifdef CHECKSUM
register unsigned secno;
#endif
struct diskpart *label;
if (ior == 0)
return;
if (tgt->flags & TGT_BBR_ACTIVE)
{
scdisk_bbr_start(tgt, done);
return;
}
if (done) {
register unsigned int xferred;
unsigned int max_dma_data;
max_dma_data = scsi_softc[(unsigned char)tgt->masterno]->max_dma_data;
/* see if we must retry */
if ((tgt->done == SCSI_RET_RETRY) &&
((ior->io_op & IO_INTERNAL) == 0)) {
delay(1000000);/*XXX*/
goto start;
} else
/* got a bus reset ? pifff.. */
if ((tgt->done == (SCSI_RET_ABORTED|SCSI_RET_RETRY)) &&
((ior->io_op & IO_INTERNAL) == 0)) {
if (xferred = ior->io_residual) {
ior->io_data -= xferred;
ior->io_count += xferred;
ior->io_recnum -= xferred / tgt->block_size;
ior->io_residual = 0;
}
goto start;
} else
/*
* Quickly check for errors: if anything goes wrong
* we do a request sense, see if that is what we did.
*/
if (tgt->cur_cmd == SCSI_CMD_REQUEST_SENSE) {
scsi_sense_data_t *sns;
unsigned int blockno;
char *outcome;
ior->io_op = ior->io_temporary;
sns = (scsi_sense_data_t *)tgt->cmd_ptr;
if (sns->addr_valid)
blockno = sns->u.xtended.info0 << 24 |
sns->u.xtended.info1 << 16 |
sns->u.xtended.info2 << 8 |
sns->u.xtended.info3;
else {
part = rzpartition(ior->io_unit);
label = lookup_part(tgt->dev_info.disk.scsi_array, part);
blockno = label->start;
blockno += ior->io_recnum;
if (!label) blockno=-1;
}
if (scsi_check_sense_data(tgt, sns)) {
ior->io_error = 0;
if ((tgt->done == SCSI_RET_RETRY) &&
((ior->io_op & IO_INTERNAL) == 0)) {
delay(1000000);/*XXX*/
goto start;
}
outcome = "Recovered";
} else {
outcome = "Unrecoverable";
ior->io_error = D_IO_ERROR;
ior->io_op |= IO_ERROR;
}
if ((tgt->flags & TGT_OPTIONAL_CMD) == 0) {
printf("%s Error, rz%d: %s%s%d\n", outcome,
tgt->target_id + (tgt->masterno * 8),
(ior->io_op & IO_READ) ? "Read" :
((ior->io_op & IO_INTERNAL) ? "(command)" : "Write"),
" disk error, phys block no. ", blockno);
scsi_print_sense_data(sns);
/*
* On fatal read/write errors try replacing the bad block
* The bbr routine will return TRUE iff it took control
* over the target for all subsequent operations. In this
* event, the queue of requests is effectively frozen.
*/
if (ior->io_error &&
((sns->error_class == SCSI_SNS_XTENDED_SENSE_DATA) &&
((sns->u.xtended.sense_key == SCSI_SNS_HW_ERR) ||
(sns->u.xtended.sense_key == SCSI_SNS_MEDIUM_ERR))) &&
scdisk_bad_block_repl(tgt, blockno))
return;
}
}
/*
* See if we had errors
*/
else if (tgt->done != SCSI_RET_SUCCESS) {
if (tgt->done == SCSI_RET_NEED_SENSE) {
ior->io_temporary = ior->io_op;
ior->io_op = IO_INTERNAL;
scsi_request_sense(tgt, ior, 0);
return;
} else if (tgt->done == SCSI_RET_DEVICE_DOWN) {
ior->io_error = D_DEVICE_DOWN;
ior->io_op |= IO_ERROR;
} else {
printf("%s%x\n", "?rz_disk Disk error, ret=x", tgt->done);
ior->io_error = D_IO_ERROR;
ior->io_op |= IO_ERROR;
}
}
/*
* No errors.
* See if we requested more than the max
* (We use io_residual in a flip-side way here)
*/
else if (ior->io_count > (xferred = max_dma_data)) {
ior->io_residual += xferred;
ior->io_count -= xferred;
ior->io_data += xferred;
ior->io_recnum += xferred / tgt->block_size;
goto start;
}
else if (xferred = ior->io_residual) {
ior->io_data -= xferred;
ior->io_count += xferred;
ior->io_recnum -= xferred / tgt->block_size;
ior->io_residual = 0;
} /* that's it */
#ifdef CHECKSUM
if ((ior->io_op & IO_READ) && (ior->io_count < max_checksum_size)) {
part = rzpartition(ior->io_unit);
label=lookup_part(tgt->dev_info.disk.scsi_array, part);
if (!label) printf("NOT FOUND!\n");
secno = ior->io_recnum + label->start;
scdisk_bcheck(secno, ior->io_data, ior->io_count);
}
#endif CHECKSUM
/* dequeue next one */
{
io_req_t next;
simple_lock(&tgt->target_lock);
next = ior->io_next;
tgt->ior = next;
simple_unlock(&tgt->target_lock);
iodone(ior);
if (next == 0)
return;
ior = next;
}
#ifdef CHECKSUM
if (((ior->io_op & IO_READ) == 0) && (ior->io_count < max_checksum_size)) {
part = rzpartition(ior->io_unit);
label=lookup_part(tgt->dev_info.disk.scsi_array, part);
secno = ior->io_recnum + label->start;
scdisk_checksum(secno, ior->io_data, ior->io_count);
}
#endif CHECKSUM
}
ior->io_residual = 0;
start:
scdisk_start_rw( tgt, ior);
}
void scdisk_start_rw( tgt, ior)
target_info_t *tgt;
register io_req_t ior;
{
unsigned int part, secno;
register boolean_t long_form;
struct diskpart *label;
part = rzpartition(ior->io_unit);
label=lookup_part(tgt->dev_info.disk.scsi_array, part);
if (!label)
printf("NOT FOUND!\n");
secno = ior->io_recnum + label->start;
/* Use long form if either big block addresses or
the size is more than we can fit in one byte */
long_form = (tgt->flags & TGT_BIG) ||
(ior->io_count > (256 * tgt->block_size));
if (ior->io_op & IO_READ)
(long_form ? scsi_long_read : scdisk_read)(tgt, secno, ior);
else if ((ior->io_op & IO_INTERNAL) == 0)
(long_form ? scsi_long_write : scdisk_write)(tgt, secno, ior);
}
#include <sys/ioctl.h>
#ifdef ULTRIX_COMPAT
#include <mips/PMAX/rzdisk.h>
#endif /*ULTRIX_COMPAT*/
io_return_t
scdisk_get_status(dev, tgt, flavor, status, status_count)
int dev;
target_info_t *tgt;
dev_flavor_t flavor;
dev_status_t status;
natural_t *status_count;
{
struct disklabel *lp;
struct diskpart *label;
lp = &tgt->dev_info.disk.l;
switch (flavor) {
#ifdef MACH_KERNEL
case DEV_GET_SIZE:
label=lookup_part(tgt->dev_info.disk.scsi_array, rzpartition(dev));
status[DEV_GET_SIZE_DEVICE_SIZE] = label->size * lp->d_secsize;
status[DEV_GET_SIZE_RECORD_SIZE] = tgt->block_size;
*status_count = DEV_GET_SIZE_COUNT;
break;
#endif
case DIOCGDINFO:
*(struct disklabel *)status = *lp;
#ifdef MACH_KERNEL
*status_count = sizeof(struct disklabel)/sizeof(int);
#endif MACH_KERNEL
break;
case DIOCGDINFO - (0x10<<16):
*(struct disklabel *)status = *lp;
#ifdef MACH_KERNEL
*status_count = sizeof(struct disklabel)/sizeof(int) - 4;
#endif MACH_KERNEL
break;
#ifdef MACH_KERNEL
#else /*MACH_KERNEL*/
#if ULTRIX_COMPAT
case SCSI_MODE_SENSE: /*_IOWR(p, 9, struct mode_sel_sns_params) */
break;
case DIOCGETPT: /*_IOR(p, 1, struct pt) */
case SCSI_GET_SENSE: /*_IOR(p, 10, struct extended_sense) */
return ul_disk_ioctl(tgt, flavor, status, status_count);
#endif /*ULTRIX_COMPAT*/
#endif /*!MACH_KERNEL*/
#if 0
case DIOCRFORMAT:
break;
#endif
default:
#ifdef i386
return(scsi_i386_get_status(dev, tgt, flavor, status, status_count));
#else i386
return(D_INVALID_OPERATION);
#endif i386
}
return D_SUCCESS;
}
io_return_t
scdisk_set_status(dev, tgt, flavor, status, status_count)
int dev;
target_info_t *tgt;
dev_flavor_t flavor;
dev_status_t status;
natural_t status_count;
{
io_return_t error = D_SUCCESS;
struct disklabel *lp;
lp = &tgt->dev_info.disk.l;
switch (flavor) {
case DIOCSRETRIES:
#ifdef MACH_KERNEL
if (status_count != sizeof(int))
return D_INVALID_SIZE;
#endif /* MACH_KERNEL */
scsi_bbr_retries = *(int *)status;
break;
case DIOCWLABEL:
case DIOCWLABEL - (0x10<<16):
if (*(int*)status)
tgt->flags |= TGT_WRITE_LABEL;
else
tgt->flags &= ~TGT_WRITE_LABEL;
break;
case DIOCSDINFO:
case DIOCSDINFO - (0x10<<16):
case DIOCWDINFO:
case DIOCWDINFO - (0x10<<16):
#ifdef MACH_KERNEL
if (status_count != sizeof(struct disklabel) / sizeof(int))
return D_INVALID_SIZE;
#endif /* MACH_KERNEL */
error = setdisklabel(lp, (struct disklabel*) status);
if (error || (flavor == DIOCSDINFO) || (flavor == DIOCSDINFO - (0x10<<16)))
return error;
error = scdisk_writelabel(tgt);
break;
#ifdef MACH_KERNEL
#else /*MACH_KERNEL*/
#if ULTRIX_COMPAT
case SCSI_FORMAT_UNIT: /*_IOW(p, 4, struct format_params) */
case SCSI_REASSIGN_BLOCK: /*_IOW(p, 5, struct reassign_params) */
case SCSI_READ_DEFECT_DATA: /*_IOW(p, 6, struct read_defect_params) */
case SCSI_VERIFY_DATA: /*_IOW(p, 7, struct verify_params) */
case SCSI_MODE_SELECT: /*_IOW(p, 8, struct mode_sel_sns_params) */
case SCSI_MODE_SENSE: /*_IOW(p, 9, struct mode_sel_sns_params) */
case SCSI_GET_INQUIRY_DATA: /*_IOW(p, 11, struct inquiry_info) */
return ul_disk_ioctl(tgt, flavor, status, status_count);
#endif /*ULTRIX_COMPAT*/
#endif /*!MACH_KERNEL*/
#if notyet
case DIOCWFORMAT:
case DIOCSBAD: /* ?? how ? */
#endif
default:
#ifdef i386
error = scsi_i386_set_status(dev, tgt, flavor, status, status_count);
#else i386
error = D_INVALID_OPERATION;
#endif i386
}
return error;
}
static int grab_it(tgt, ior)
target_info_t *tgt;
io_req_t ior;
{
spl_t s;
s = splbio();
simple_lock(&tgt->target_lock);
if (!tgt->ior)
tgt->ior = ior;
simple_unlock(&tgt->target_lock);
splx(s);
if (tgt->ior != ior)
return D_ALREADY_OPEN;
return D_SUCCESS;
}
/* Write back a label to the disk */
io_return_t scdisk_writelabel(tgt)
target_info_t *tgt;
{
printf("scdisk_writelabel: NO LONGER IMPLEMENTED\n");
#if 0
/* Taken out at Bryan's suggestion until 'fixed' for slices */
io_req_t ior;
char *data = (char *)0;
struct disklabel *label;
io_return_t error;
int dev_bsize = tgt->block_size;
io_req_alloc(ior,0);
#ifdef MACH_KERNEL
data = (char *)kalloc(dev_bsize);
#else /*MACH_KERNEL*/
data = (char *)ior->io_data;
#endif /*MACH_KERNEL*/
ior->io_next = 0;
ior->io_prev = 0;
ior->io_data = data;
ior->io_count = dev_bsize;
ior->io_op = IO_READ;
ior->io_error = 0;
if (grab_it(tgt, ior) != D_SUCCESS) {
error = D_ALREADY_OPEN;
goto ret;
}
scdisk_read( tgt, tgt->dev_info.disk.labelsector, ior);
iowait(ior);
if (error = ior->io_error)
goto ret;
label = (struct disklabel *) &data[tgt->dev_info.disk.labeloffset];
*label = tgt->dev_info.disk.l;
ior->io_next = 0;
ior->io_prev = 0;
ior->io_data = data;
ior->io_count = dev_bsize;
ior->io_op = IO_WRITE;
while (grab_it(tgt, ior) != D_SUCCESS) ; /* ahem */
scdisk_write( tgt, tgt->dev_info.disk.labelsector, ior);
iowait(ior);
error = ior->io_error;
ret:
#ifdef MACH_KERNEL
if (data) kfree((int)data, dev_bsize);
#endif /*MACH_KERNEL*/
io_req_free(ior);
return error;
#endif 0 scdisk_writelabel
return -1; /* FAILURE ? */
}
#ifdef MACH_KERNEL
#else /*MACH_KERNEL*/
#if ULTRIX_COMPAT
io_return_t ul_disk_ioctl(tgt, flavor, status, status_count)
target_info_t *tgt;
dev_flavor_t flavor;
dev_status_t status;
natural_t status_count;
{
io_return_t ret;
scsi_ret_t err = SCSI_RET_ABORTED;/*xxx*/
io_req_t ior;
if (!suser())
return EACCES;
ior = geteblk(sizeof(struct defect_descriptors));
ior->io_next = 0;
ior->io_count = 0;
ior->io_op = IO_INTERNAL;
ior->io_error = 0;
ior->io_recnum = 0;
ior->io_residual = 0;
switch (flavor) {
case DIOCGETPT: { /*_IOR(p, 1, struct pt) */
scsi_dec_label_t *p;
struct disklabel *lp;
int i;
lp = &tgt->dev_info.disk.l;
p = (scsi_dec_label_t *)status;
p->magic = DEC_PARTITION_MAGIC;
p->in_use = 1;
for (i = 0; i < 8; i++) {
label=lookup_part(tgt->dev_info.disk.scsi_array, part);
p->partitions[i].n_sectors = label->size;
p->partitions[i].offset = label->start;
}
err = SCSI_RET_SUCCESS;
}
break;
case SCSI_GET_SENSE: { /*_IOR(p, 10, struct extended_sense) */
scsi_sense_data_t *s;
s = (scsi_sense_data_t*)tgt->cmd_ptr;
bcopy(s, status, sizeof(*s) + s->u.xtended.add_len - 1);
err = SCSI_RET_SUCCESS;
/* only once */
bzero(tgt->cmd_ptr, sizeof(scsi_sense_data_t));
}
break;
case SCSI_GET_INQUIRY_DATA: { /*_IOR(p, 11, struct inquiry_info) */
struct mode_sel_sns_params *ms;
ms = (struct mode_sel_sns_params*)status;
err = scsi_inquiry( tgt, SCSI_INQ_STD_DATA);
if (copyout(tgt->cmd_ptr, ms->msp_addr, sizeof(struct inquiry_info))){
ret = EFAULT;
goto out;
}
}
break;
case SCSI_FORMAT_UNIT: { /*_IOW(p, 4, struct format_params) */
struct format_params *fp;
struct defect_descriptors *df;
unsigned char mode;
unsigned int old_timeout;
fp = (struct format_params *)status;
df = (struct defect_descriptors*)ior->io_data;
if (fp->fp_length != 0) {
if (copyin(fp->fp_addr, df, sizeof(*df))) {
ret = EFAULT;
goto out;
}
ior->io_count = sizeof(*df);
} else
ior->io_count = 0;
mode = fp->fp_format & SCSI_CMD_FMT_LIST_TYPE;
switch (fp->fp_defects) {
case VENDOR_DEFECTS:
mode |= SCSI_CMD_FMT_FMTDATA|SCSI_CMD_FMT_CMPLIST;
break;
case KNOWN_DEFECTS:
mode |= SCSI_CMD_FMT_FMTDATA;
break;
case NO_DEFECTS:
default:
break;
}
old_timeout = scsi_watchdog_period;
scsi_watchdog_period = 60*60; /* 1 hour should be enough, I hope */
err = scsi_format_unit( tgt, mode, fp->fp_pattern,
fp->fp_interleave, ior);
scsi_watchdog_period = old_timeout;
/* Make sure we re-read all info afresh */
tgt->flags = TGT_ALIVE |
(tgt->flags & (TGT_REMOVABLE_MEDIA|TGT_FULLY_PROBED));
}
break;
case SCSI_REASSIGN_BLOCK: { /*_IOW(p, 5, struct reassign_params) */
struct reassign_params *r;
int ndef;
r = (struct reassign_params*) status;
ndef = r->rp_header.defect_len0 | (r->rp_header.defect_len1 >> 8);
ndef >>= 2;
tgt->ior = ior;
(void) scsi_reassign_blocks( tgt, &r->rp_lbn3, ndef, ior);
iowait(ior);
err = tgt->done;
}
break;
case SCSI_READ_DEFECT_DATA: { /*_IOW(p, 6, struct read_defect_params) */
struct read_defect_params *dp;
dp = (struct read_defect_params *)status;
ior->io_count = ior->io_alloc_size;
if (dp->rdp_alclen > ior->io_count)
dp->rdp_alclen = ior->io_count;
else
ior->io_count = dp->rdp_alclen;
ior->io_op |= IO_READ;
tgt->ior = ior;
err = scsi_read_defect(tgt, dp->rdp_format|0x18, ior);
if (copyout(ior->io_data, dp->rdp_addr, dp->rdp_alclen)) {
ret = EFAULT;
goto out;
}
}
break;
case SCSI_VERIFY_DATA: { /*_IOW(p, 7, struct verify_params) */
struct verify_params *v;
unsigned int old_timeout;
old_timeout = scsi_watchdog_period;
scsi_watchdog_period = 5*60; /* 5 mins enough, I hope */
v = (struct verify_params *)status;
ior->io_count = 0;
err = scdisk_verify( tgt, v->vp_lbn, v->vp_length, ior);
scsi_watchdog_period = old_timeout;
}
break;
case SCSI_MODE_SELECT: { /*_IOW(p, 8, struct mode_sel_sns_params) */
struct mode_sel_sns_params *ms;
ms = (struct mode_sel_sns_params*)status;
if(copyin(ms->msp_addr, ior->io_data, ms->msp_length)) {
ret = EFAULT;
goto out;
}
err = scdisk_mode_select( tgt, DEV_BSIZE, ior, ior->io_data,
ms->msp_length, ms->msp_setps);
}
break;
case SCSI_MODE_SENSE: { /*_IOWR(p, 9, struct mode_sel_sns_params) */
struct mode_sel_sns_params *ms;
unsigned char pagecode;
ms = (struct mode_sel_sns_params*)status;
pagecode = (ms->msp_pgcode & 0x3f) | (ms->msp_pgctrl << 6);
err = scsi_mode_sense( tgt, pagecode, ms->msp_length, ior);
if (copyout(tgt->cmd_ptr, ms->msp_addr, ms->msp_length)){
ret = EFAULT;
goto out;
}
}
break;
}
ret = (err == SCSI_RET_SUCCESS) ? D_SUCCESS : D_IO_ERROR;
if (ior->io_op & IO_ERROR)
ret = D_IO_ERROR;
out:
brelse(ior);
return ret;
}
#endif /*ULTRIX_COMPAT*/
#endif /*!MACH_KERNEL*/
#ifdef CHECKSUM
#define SUMSIZE 0x10000
#define SUMHASH(b) (((b)>>1) & (SUMSIZE - 1))
struct {
long blockno;
long sum;
} scdisk_checksums[SUMSIZE];
void scdisk_checksum(bno, addr, size)
long bno;
register unsigned int *addr;
{
register int i = size/sizeof(int);
register unsigned int sum = -1;
while (i-- > 0)
sum ^= *addr++;
scdisk_checksums[SUMHASH(bno)].blockno = bno;
scdisk_checksums[SUMHASH(bno)].sum = sum;
}
void scdisk_bcheck(bno, addr, size)
long bno;
register unsigned int *addr;
{
register int i = size/sizeof(int);
register unsigned int sum = -1;
unsigned int *start = addr;
if (scdisk_checksums[SUMHASH(bno)].blockno != bno) {
if (scsi_debug) printf("No checksum for block x%x\n", bno);
return;
}
while (i-- > 0)
sum ^= *addr++;
if (scdisk_checksums[SUMHASH(bno)].sum != sum) {
printf("Bad checksum (x%x != x%x), bno x%x size x%x at x%x\n",
sum,
scdisk_checksums[bno & (SUMSIZE - 1)].sum,
bno, size, start);
gimmeabreak();
scdisk_checksums[SUMHASH(bno)].sum = sum;
}
}
#endif CHECKSUM
/*#define PERF */
#ifdef PERF
int test_read_size = 512;
int test_read_skew = 12;
int test_read_skew_min = 0;
int test_read_nreads = 1000;
int test_read_bdev = 0;
#include <sys/time.h>
void test_read(max)
{
int i, ssk, usecs;
struct timeval start, stop;
if (max == 0)
max = test_read_skew + 1;
ssk = test_read_skew;
for (i = test_read_skew_min; i < max; i++){
test_read_skew = i;
start = time;
read_test();
stop = time;
usecs = stop.tv_usec - start.tv_usec;
if (usecs < 0) {
stop.tv_sec -= 1;
usecs += 1000000;
}
printf("Skew %3d size %d count %d time %3d sec %d us\n",
i, test_read_size, test_read_nreads,
stop.tv_sec - start.tv_sec, usecs);
}
test_read_skew = ssk;
}
void read_test()
{
static int buffer[(8192*2)/sizeof(int)];
struct io_req io;
register int i, rec;
bzero(&io, sizeof(io));
io.io_unit = test_read_bdev;
io.io_op = IO_READ;
io.io_count = test_read_size;
io.io_data = (char*) buffer;
for (rec = 0, i = 0; i < test_read_nreads; i++) {
io.io_op = IO_READ;
io.io_recnum = rec;
scdisk_strategy(&io);
rec += test_read_skew;
iowait(&io);
}
}
void tur_test()
{
struct io_req io;
register int i;
char *a, *b;
struct timeval start, stop;
bzero(&io, sizeof(io));
io.io_unit = test_read_bdev;
io.io_data = (char*)&io;/*unused but kernel space*/
start = time;
for (i = 0; i < test_read_nreads; i++) {
io.io_op = IO_INTERNAL;
rz_check(io.io_unit, &a, &b);
scsi_test_unit_ready(b,&io);
}
stop = time;
i = stop.tv_usec - start.tv_usec;
if (i < 0) {
stop.tv_sec -= 1;
i += 1000000;
}
printf("%d test-unit-ready took %3d sec %d us\n",
test_read_nreads,
stop.tv_sec - start.tv_sec, i);
}
#endif PERF
/*#define WDEBUG*/
#ifdef WDEBUG
int buggo_write_size = 8192;
int buggo_dev = 2; /* rz0b */ /* changed by KTVM from 1 (still b) */
int buggo_out_buffer[8192/2];
int buggo_in_buffer[8192/2];
int buggotest(n, pattern, verbose)
{
struct io_req io;
register int i, rec;
if (n <= 0)
n = 1;
if(pattern)
for (i = 0; i < buggo_write_size/4; i++)
buggo_out_buffer[i] = i + pattern;
for (i = 0; i < n; i++) {
register int j;
buggo_out_buffer[0] = i + pattern;
buggo_out_buffer[(buggo_write_size/4)-1] = i + pattern;
bzero(&io, sizeof(io));
io.io_unit = buggo_dev;
io.io_data = (char*)buggo_out_buffer;
io.io_op = IO_WRITE;
io.io_count = buggo_write_size;
io.io_recnum = i % 1024;
scdisk_strategy(&io);
bzero(buggo_in_buffer, sizeof(buggo_in_buffer));
iowait(&io);
if (verbose)
printf("Done write with %x", io.io_error);
bzero(&io, sizeof(io));
io.io_unit = buggo_dev;
io.io_data = (char*)buggo_in_buffer;
io.io_op = IO_READ;
io.io_count = buggo_write_size;
io.io_recnum = i % 1024;
scdisk_strategy(&io);
iowait(&io);
if (verbose)
printf("Done read with %x", io.io_error);
for (j = 0; j < buggo_write_size/4; j++)
if (buggo_out_buffer[j] != buggo_in_buffer[j]){
printf("Difference at %d-th word: %x %x\n",
buggo_out_buffer[j], buggo_in_buffer[j]);
return i;
}
}
printf("Test ok\n");
return n;
}
#endif WDEBUG
#endif /* NSCSI > 0 */
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