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NetBSD/sys/arch/atari/dev/hdfd.c
thorpej fe551f0e64 Fix a bug in disksort_*() which caused non-optimal ordering when multiple 
active partitions were on a single spindle.  Add a b_rawblkno member to
struct buf which contains the non-partition-relative block number to sort
by.
2000-02-07 20:16:47 +00:00

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/* $NetBSD: hdfd.c,v 1.19 2000/02/07 20:16:50 thorpej Exp $ */
/*-
* Copyright (c) 1996 Leo Weppelman
* Copyright (c) 1993, 1994, 1995, 1996
* Charles M. Hannum. All rights reserved.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Don Ahn.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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.
*
* @(#)fd.c 7.4 (Berkeley) 5/25/91
*/
/*
* Floppy formatting facilities merged from FreeBSD fd.c driver:
* Id: fd.c,v 1.53 1995/03/12 22:40:56 joerg Exp
* which carries the same copyright/redistribution notice as shown above with
* the addition of the following statement before the "Redistribution and
* use ..." clause:
*
* Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
*
* Copyright (c) 1993, 1994, 1995 by
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
* dufault@hda.com (Peter Dufault)
*/
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/dkstat.h>
#include <sys/disk.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/proc.h>
#include <sys/fdio.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/iomap.h>
#include <machine/mfp.h>
#include <atari/dev/hdfdreg.h>
#include <atari/atari/intr.h>
#include <atari/atari/device.h>
#include "locators.h"
/*
* {b,c}devsw[] function prototypes
*/
dev_type_open(fdopen);
dev_type_close(fdclose);
dev_type_read(fdread);
dev_type_write(fdwrite);
dev_type_ioctl(fdioctl);
dev_type_size(fdsize);
dev_type_dump(fddump);
volatile u_char *fdio_addr;
#define wrt_fdc_reg(reg, val) { fdio_addr[reg] = val; }
#define rd_fdc_reg(reg) ( fdio_addr[reg] )
#define fdc_ienable() MFP2->mf_ierb |= IB_DCHG;
/*
* Interface to the pseudo-dma handler
*/
void fddma_intr(void);
caddr_t fddmaaddr = NULL;
int fddmalen = 0;
extern void mfp_hdfd_nf __P((void)), mfp_hdfd_fifo __P((void));
/*
* Argument to fdcintr.....
*/
static void *intr_arg = NULL; /* XXX: arg. to intr_establish() */
#define FDUNIT(dev) (minor(dev) / 8)
#define FDTYPE(dev) (minor(dev) % 8)
/* XXX misuse a flag to identify format operation */
#define B_FORMAT B_XXX
enum fdc_state {
DEVIDLE = 0,
MOTORWAIT,
DOSEEK,
SEEKWAIT,
SEEKTIMEDOUT,
SEEKCOMPLETE,
DOIO,
IOCOMPLETE,
IOTIMEDOUT,
DORESET,
RESETCOMPLETE,
RESETTIMEDOUT,
DORECAL,
RECALWAIT,
RECALTIMEDOUT,
RECALCOMPLETE,
};
/* software state, per controller */
struct fdc_softc {
struct device sc_dev; /* boilerplate */
struct fd_softc *sc_fd[4]; /* pointers to children */
TAILQ_HEAD(drivehead, fd_softc) sc_drives;
enum fdc_state sc_state;
int sc_errors; /* number of retries so far */
int sc_overruns; /* number of overruns so far */
u_char sc_status[7]; /* copy of registers */
};
/* controller driver configuration */
int fdcprobe __P((struct device *, struct cfdata *, void *));
int fdprint __P((void *, const char *));
void fdcattach __P((struct device *, struct device *, void *));
struct cfattach fdc_ca = {
sizeof(struct fdc_softc), fdcprobe, fdcattach
};
/*
* Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
* we tell them apart.
*/
struct fd_type {
int sectrac; /* sectors per track */
int heads; /* number of heads */
int seccyl; /* sectors per cylinder */
int secsize; /* size code for sectors */
int datalen; /* data len when secsize = 0 */
int steprate; /* step rate and head unload time */
int gap1; /* gap len between sectors */
int gap2; /* formatting gap */
int tracks; /* total num of tracks */
int size; /* size of disk in sectors */
int step; /* steps per cylinder */
int rate; /* transfer speed code */
u_char fillbyte; /* format fill byte */
u_char interleave; /* interleave factor (formatting) */
char *name;
};
/*
* The order of entries in the following table is important -- BEWARE!
* The order of the types is the same as for the TT/Falcon....
*/
struct fd_type fd_types[] = {
/* 360kB in 720kB drive */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_125KBPS,0xf6,1,"360KB" },
/* 3.5" 720kB diskette */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_125KBPS,0xf6,1,"720KB" },
/* 1.44MB diskette */
{ 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_250KBPS,0xf6,1,"1.44MB" },
};
/* software state, per disk (with up to 4 disks per ctlr) */
struct fd_softc {
struct device sc_dev;
struct disk sc_dk;
struct fd_type *sc_deftype; /* default type descriptor */
struct fd_type *sc_type; /* current type descriptor */
daddr_t sc_blkno; /* starting block number */
int sc_bcount; /* byte count left */
int sc_opts; /* user-set options */
int sc_skip; /* bytes already transferred */
int sc_nblks; /* #blocks currently tranferring */
int sc_nbytes; /* #bytes currently tranferring */
int sc_drive; /* physical unit number */
int sc_flags;
#define FD_OPEN 0x01 /* it's open */
#define FD_MOTOR 0x02 /* motor should be on */
#define FD_MOTOR_WAIT 0x04 /* motor coming up */
int sc_cylin; /* where we think the head is */
void *sc_sdhook; /* saved shutdown hook for drive. */
TAILQ_ENTRY(fd_softc) sc_drivechain;
int sc_ops; /* I/O ops since last switch */
struct buf_queue sc_q; /* pending I/O requests */
int sc_active; /* number of active I/O operations */
};
/* floppy driver configuration */
int fdprobe __P((struct device *, struct cfdata *, void *));
void fdattach __P((struct device *, struct device *, void *));
struct cfattach hdfd_ca = {
sizeof(struct fd_softc), fdprobe, fdattach
};
extern struct cfdriver hdfd_cd;
void fdstrategy __P((struct buf *));
void fdstart __P((struct fd_softc *));
struct dkdriver fddkdriver = { fdstrategy };
void fd_set_motor __P((struct fdc_softc *fdc, int reset));
void fd_motor_off __P((void *arg));
void fd_motor_on __P((void *arg));
int fdcresult __P((struct fdc_softc *fdc));
int out_fdc __P((u_char x));
void fdc_ctrl_intr __P((struct clockframe));
void fdcstart __P((struct fdc_softc *fdc));
void fdcstatus __P((struct device *dv, int n, char *s));
void fdctimeout __P((void *arg));
void fdcpseudointr __P((void *arg));
int fdcintr __P((void *));
void fdcretry __P((struct fdc_softc *fdc));
void fdfinish __P((struct fd_softc *fd, struct buf *bp));
int fdformat __P((dev_t, struct ne7_fd_formb *, struct proc *));
static void fdgetdisklabel __P((struct fd_softc *, dev_t));
static void fdgetdefaultlabel __P((struct fd_softc *, struct disklabel *,
int));
__inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t));
int
fdcprobe(parent, cfp, aux)
struct device *parent;
struct cfdata *cfp;
void *aux;
{
int rv = 0;
bus_space_tag_t mb_tag;
if(strcmp("fdc", aux) || cfp->cf_unit != 0)
return(0);
if (!atari_realconfig)
return 0;
if ((mb_tag = mb_alloc_bus_space_tag()) == NULL)
return 0;
if (bus_space_map(mb_tag, FD_IOBASE, FD_IOSIZE, 0,
(caddr_t*)&fdio_addr)) {
printf("fdcprobe: cannot map io-area\n");
mb_free_bus_space_tag(mb_tag);
return (0);
}
#ifdef FD_DEBUG
printf("fdcprobe: I/O mapping done va: %p\n", fdio_addr);
#endif
/* reset */
wrt_fdc_reg(fdout, 0);
delay(100);
wrt_fdc_reg(fdout, FDO_FRST);
/* see if it can handle a command */
if (out_fdc(NE7CMD_SPECIFY) < 0)
goto out;
out_fdc(0xdf);
out_fdc(7);
rv = 1;
out:
if (rv == 0) {
bus_space_unmap(mb_tag, (caddr_t)fdio_addr, FD_IOSIZE);
mb_free_bus_space_tag(mb_tag);
}
return rv;
}
/*
* Arguments passed between fdcattach and fdprobe.
*/
struct fdc_attach_args {
int fa_drive;
struct fd_type *fa_deftype;
};
/*
* Print the location of a disk drive (called just before attaching the
* the drive). If `fdc' is not NULL, the drive was found but was not
* in the system config file; print the drive name as well.
* Return QUIET (config_find ignores this if the device was configured) to
* avoid printing `fdN not configured' messages.
*/
int
fdprint(aux, fdc)
void *aux;
const char *fdc;
{
register struct fdc_attach_args *fa = aux;
if (!fdc)
printf(" drive %d", fa->fa_drive);
return QUIET;
}
void
fdcattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fdc_softc *fdc = (void *)self;
struct fdc_attach_args fa;
int has_fifo;
has_fifo = 0;
fdc->sc_state = DEVIDLE;
TAILQ_INIT(&fdc->sc_drives);
out_fdc(NE7CMD_CONFIGURE);
if (out_fdc(0) == 0) {
out_fdc(0x1a); /* No polling, fifo depth = 10 */
out_fdc(0);
/* Retain configuration across resets */
out_fdc(NE7CMD_LOCK);
(void)fdcresult(fdc);
has_fifo = 1;
}
else {
(void)rd_fdc_reg(fddata);
printf(": no fifo");
}
printf("\n");
if (intr_establish(22, USER_VEC|FAST_VEC, 0,
(hw_ifun_t)(has_fifo ? mfp_hdfd_fifo : mfp_hdfd_nf),
NULL) == NULL) {
printf("fdcattach: Can't establish interrupt\n");
return;
}
/*
* Setup the interrupt logic.
*/
MFP2->mf_iprb = (u_int8_t)~IB_DCHG;
MFP2->mf_imrb |= IB_DCHG;
MFP2->mf_aer |= 0x10; /* fdc int low->high */
/* physical limit: four drives per controller. */
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
/*
* XXX: Choose something sensible as a default...
*/
fa.fa_deftype = &fd_types[2]; /* 1.44MB */
(void)config_found(self, (void *)&fa, fdprint);
}
}
int
fdprobe(parent, cfp, aux)
struct device *parent;
struct cfdata *cfp;
void *aux;
{
struct fdc_softc *fdc = (void *)parent;
struct fdc_attach_args *fa = aux;
int drive = fa->fa_drive;
int n;
if (cfp->cf_loc[FDCCF_UNIT] != FDCCF_UNIT_DEFAULT &&
cfp->cf_loc[FDCCF_UNIT] != drive)
return 0;
/*
* XXX
* This is to work around some odd interactions between this driver
* and SMC Ethernet cards.
*/
if (cfp->cf_loc[FDCCF_UNIT] == FDCCF_UNIT_DEFAULT && drive >= 2)
return 0;
/* select drive and turn on motor */
wrt_fdc_reg(fdout, drive | FDO_FRST | FDO_MOEN(drive));
/* wait for motor to spin up */
delay(250000);
out_fdc(NE7CMD_RECAL);
out_fdc(drive);
/* wait for recalibrate */
delay(2000000);
out_fdc(NE7CMD_SENSEI);
n = fdcresult(fdc);
#ifdef FD_DEBUG
{
int i;
printf("fdprobe: status");
for (i = 0; i < n; i++)
printf(" %x", fdc->sc_status[i]);
printf("\n");
}
#endif
intr_arg = (void*)fdc;
if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
return 0;
/* turn off motor */
wrt_fdc_reg(fdout, FDO_FRST);
return 1;
}
/*
* Controller is working, and drive responded. Attach it.
*/
void
fdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fdc_softc *fdc = (void *)parent;
struct fd_softc *fd = (void *)self;
struct fdc_attach_args *fa = aux;
struct fd_type *type = fa->fa_deftype;
int drive = fa->fa_drive;
/* XXX Allow `flags' to override device type? */
if (type)
printf(": %s %d cyl, %d head, %d sec\n", type->name,
type->tracks, type->heads, type->sectrac);
else
printf(": density unknown\n");
BUFQ_INIT(&fd->sc_q);
fd->sc_cylin = -1;
fd->sc_drive = drive;
fd->sc_deftype = type;
fdc->sc_fd[drive] = fd;
/*
* Initialize and attach the disk structure.
*/
fd->sc_dk.dk_name = fd->sc_dev.dv_xname;
fd->sc_dk.dk_driver = &fddkdriver;
disk_attach(&fd->sc_dk);
/* XXX Need to do some more fiddling with sc_dk. */
dk_establish(&fd->sc_dk, &fd->sc_dev);
/* Needed to power off if the motor is on when we halt. */
fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
}
/*
* This is called from the assembly part of the interrupt handler
* when it is clear that the interrupt was not related to shoving
* data.
*/
void
fdc_ctrl_intr(frame)
struct clockframe frame;
{
int s;
/*
* Disable further interrupts. The fdcintr() routine
* explicitely enables them when needed.
*/
MFP2->mf_ierb &= ~IB_DCHG;
/*
* Set fddmalen to zero so no pseudo-dma transfers will
* occur.
*/
fddmalen = 0;
if (!BASEPRI(frame.cf_sr)) {
/*
* We don't want to stay on ipl6.....
*/
add_sicallback((si_farg)fdcpseudointr, intr_arg, 0);
}
else {
s = splbio();
(void) fdcintr(intr_arg);
splx(s);
}
}
__inline struct fd_type *
fd_dev_to_type(fd, dev)
struct fd_softc *fd;
dev_t dev;
{
int type = FDTYPE(dev);
if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
return NULL;
return type ? &fd_types[type - 1] : fd->sc_deftype;
}
void
fdstrategy(bp)
register struct buf *bp; /* IO operation to perform */
{
struct fd_softc *fd = hdfd_cd.cd_devs[FDUNIT(bp->b_dev)];
int sz;
int s;
/* Valid unit, controller, and request? */
if (bp->b_blkno < 0 ||
((bp->b_bcount % FDC_BSIZE) != 0 &&
(bp->b_flags & B_FORMAT) == 0)) {
bp->b_error = EINVAL;
goto bad;
}
/* If it's a null transfer, return immediately. */
if (bp->b_bcount == 0)
goto done;
sz = howmany(bp->b_bcount, FDC_BSIZE);
if (bp->b_blkno + sz > fd->sc_type->size) {
sz = fd->sc_type->size - bp->b_blkno;
if (sz == 0) {
/* If exactly at end of disk, return EOF. */
goto done;
}
if (sz < 0) {
/* If past end of disk, return EINVAL. */
bp->b_error = EINVAL;
goto bad;
}
/* Otherwise, truncate request. */
bp->b_bcount = sz << DEV_BSHIFT;
}
bp->b_rawblkno = bp->b_blkno;
bp->b_cylinder = bp->b_blkno / (FDC_BSIZE/DEV_BSIZE) / fd->sc_type->seccyl;
#ifdef FD_DEBUG
printf("fdstrategy: b_blkno %d b_bcount %ld blkno %ld cylin %ld sz"
" %d\n", bp->b_blkno, bp->b_bcount, (long)fd->sc_blkno,
bp->b_cylinder, sz);
#endif
/* Queue transfer on drive, activate drive and controller if idle. */
s = splbio();
disksort_cylinder(&fd->sc_q, bp);
untimeout(fd_motor_off, fd); /* a good idea */
if (fd->sc_active == 0)
fdstart(fd);
#ifdef DIAGNOSTIC
else {
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
if (fdc->sc_state == DEVIDLE) {
printf("fdstrategy: controller inactive\n");
fdcstart(fdc);
}
}
#endif
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
/* Toss transfer; we're done early. */
bp->b_resid = bp->b_bcount;
biodone(bp);
}
void
fdstart(fd)
struct fd_softc *fd;
{
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
int active = fdc->sc_drives.tqh_first != 0;
/* Link into controller queue. */
fd->sc_active = 1;
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
/* If controller not already active, start it. */
if (!active)
fdcstart(fdc);
}
void
fdfinish(fd, bp)
struct fd_softc *fd;
struct buf *bp;
{
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
/*
* Move this drive to the end of the queue to give others a `fair'
* chance. We only force a switch if N operations are completed while
* another drive is waiting to be serviced, since there is a long motor
* startup delay whenever we switch.
*/
if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
if (BUFQ_NEXT(bp) != NULL)
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
else
fd->sc_active = 0;
}
bp->b_resid = fd->sc_bcount;
fd->sc_skip = 0;
BUFQ_REMOVE(&fd->sc_q, bp);
biodone(bp);
/* turn off motor 5s from now */
timeout(fd_motor_off, fd, 5 * hz);
fdc->sc_state = DEVIDLE;
}
int
fdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
fdwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
void
fd_set_motor(fdc, reset)
struct fdc_softc *fdc;
int reset;
{
struct fd_softc *fd;
u_char status;
int n;
if ((fd = fdc->sc_drives.tqh_first) != NULL)
status = fd->sc_drive;
else
status = 0;
if (!reset)
status |= FDO_FRST | FDO_FDMAEN;
for (n = 0; n < 4; n++)
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
status |= FDO_MOEN(n);
wrt_fdc_reg(fdout, status);
}
void
fd_motor_off(arg)
void *arg;
{
struct fd_softc *fd = arg;
int s;
s = splbio();
fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
fd_set_motor((struct fdc_softc *)fd->sc_dev.dv_parent, 0);
splx(s);
}
void
fd_motor_on(arg)
void *arg;
{
struct fd_softc *fd = arg;
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
int s;
s = splbio();
fd->sc_flags &= ~FD_MOTOR_WAIT;
if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT))
(void) fdcintr(fdc);
splx(s);
}
int
fdcresult(fdc)
struct fdc_softc *fdc;
{
u_char i;
int j = 100000,
n = 0;
for (; j; j--) {
i = rd_fdc_reg(fdsts) & (NE7_DIO | NE7_RQM | NE7_CB);
if (i == NE7_RQM)
return n;
if (i == (NE7_DIO | NE7_RQM | NE7_CB)) {
if (n >= sizeof(fdc->sc_status)) {
log(LOG_ERR, "fdcresult: overrun\n");
return -1;
}
fdc->sc_status[n++] = rd_fdc_reg(fddata);
}
else delay(10);
}
log(LOG_ERR, "fdcresult: timeout\n");
return -1;
}
int
out_fdc(x)
u_char x;
{
int i = 100000;
while (((rd_fdc_reg(fdsts) & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0)
delay(1);
if (i <= 0)
return -1;
wrt_fdc_reg(fddata, x);
return 0;
}
int
fdopen(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
int unit;
struct fd_softc *fd;
struct fd_type *type;
unit = FDUNIT(dev);
if (unit >= hdfd_cd.cd_ndevs)
return ENXIO;
fd = hdfd_cd.cd_devs[unit];
if (fd == 0)
return ENXIO;
type = fd_dev_to_type(fd, dev);
if (type == NULL)
return ENXIO;
if ((fd->sc_flags & FD_OPEN) != 0 &&
fd->sc_type != type)
return EBUSY;
fd->sc_type = type;
fd->sc_cylin = -1;
fd->sc_flags |= FD_OPEN;
return 0;
}
int
fdclose(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
struct fd_softc *fd = hdfd_cd.cd_devs[FDUNIT(dev)];
fd->sc_flags &= ~FD_OPEN;
fd->sc_opts &= ~(FDOPT_NORETRY|FDOPT_SILENT);
return 0;
}
void
fdcstart(fdc)
struct fdc_softc *fdc;
{
#ifdef DIAGNOSTIC
/* only got here if controller's drive queue was inactive; should
be in idle state */
if (fdc->sc_state != DEVIDLE) {
printf("fdcstart: not idle\n");
return;
}
#endif
(void) fdcintr(fdc);
}
void
fdcstatus(dv, n, s)
struct device *dv;
int n;
char *s;
{
struct fdc_softc *fdc = (void *)dv->dv_parent;
char bits[64];
if (n == 0) {
out_fdc(NE7CMD_SENSEI);
(void) fdcresult(fdc);
n = 2;
}
printf("%s: %s", dv->dv_xname, s);
switch (n) {
case 0:
printf("\n");
break;
case 2:
printf(" (st0 %s cyl %d)\n",
bitmask_snprintf(fdc->sc_status[0], NE7_ST0BITS,
bits, sizeof(bits)), fdc->sc_status[1]);
break;
case 7:
printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0],
NE7_ST0BITS, bits, sizeof(bits)));
printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1],
NE7_ST1BITS, bits, sizeof(bits)));
printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2],
NE7_ST2BITS, bits, sizeof(bits)));
printf(" cyl %d head %d sec %d)\n",
fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
break;
#ifdef DIAGNOSTIC
default:
printf("\nfdcstatus: weird size");
break;
#endif
}
}
void
fdctimeout(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
struct fd_softc *fd = fdc->sc_drives.tqh_first;
int s;
s = splbio();
fdcstatus(&fd->sc_dev, 0, "timeout");
if (BUFQ_FIRST(&fd->sc_q) != NULL)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void) fdcintr(fdc);
splx(s);
}
void
fdcpseudointr(arg)
void *arg;
{
int s;
/* Just ensure it has the right spl. */
s = splbio();
(void) fdcintr(arg);
splx(s);
}
int
fdcintr(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
#define st0 fdc->sc_status[0]
#define st1 fdc->sc_status[1]
#define cyl fdc->sc_status[1]
struct fd_softc *fd;
struct buf *bp;
int read, head, sec, i, nblks;
struct fd_type *type;
struct ne7_fd_formb *finfo = NULL;
loop:
/* Is there a drive for the controller to do a transfer with? */
fd = fdc->sc_drives.tqh_first;
if (fd == NULL) {
fdc->sc_state = DEVIDLE;
return 1;
}
/* Is there a transfer to this drive? If not, deactivate drive. */
bp = BUFQ_FIRST(&fd->sc_q);
if (bp == NULL) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
fd->sc_active = 0;
goto loop;
}
if (bp->b_flags & B_FORMAT)
finfo = (struct ne7_fd_formb *)bp->b_data;
switch (fdc->sc_state) {
case DEVIDLE:
fdc->sc_errors = 0;
fdc->sc_overruns = 0;
fd->sc_skip = 0;
fd->sc_bcount = bp->b_bcount;
fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE);
untimeout(fd_motor_off, fd);
if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
fdc->sc_state = MOTORWAIT;
return 1;
}
if ((fd->sc_flags & FD_MOTOR) == 0) {
/* Turn on the motor, being careful about pairing. */
struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1];
if (ofd && ofd->sc_flags & FD_MOTOR) {
untimeout(fd_motor_off, ofd);
ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
}
fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
fd_set_motor(fdc, 0);
fdc->sc_state = MOTORWAIT;
/* Allow .25s for motor to stabilize. */
timeout(fd_motor_on, fd, hz / 4);
return 1;
}
/* Make sure the right drive is selected. */
fd_set_motor(fdc, 0);
/* fall through */
case DOSEEK:
doseek:
if (fd->sc_cylin == bp->b_cylinder)
goto doio;
out_fdc(NE7CMD_SPECIFY);/* specify command */
out_fdc(fd->sc_type->steprate);
out_fdc(0x7); /* XXX head load time == 6ms - non-dma */
fdc_ienable();
out_fdc(NE7CMD_SEEK); /* seek function */
out_fdc(fd->sc_drive); /* drive number */
out_fdc(bp->b_cylinder * fd->sc_type->step);
fd->sc_cylin = -1;
fdc->sc_state = SEEKWAIT;
fd->sc_dk.dk_seek++;
disk_busy(&fd->sc_dk);
timeout(fdctimeout, fdc, 4 * hz);
return 1;
case DOIO:
doio:
if (finfo)
fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) -
(char *)finfo;
type = fd->sc_type;
sec = fd->sc_blkno % type->seccyl;
head = sec / type->sectrac;
sec -= head * type->sectrac;
nblks = type->sectrac - sec;
nblks = min(nblks, fd->sc_bcount / FDC_BSIZE);
nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE);
fd->sc_nblks = nblks;
fd->sc_nbytes = finfo ? bp->b_bcount : nblks * FDC_BSIZE;
#ifdef DIAGNOSTIC
{
int block;
block = (fd->sc_cylin * type->heads + head)
* type->sectrac + sec;
if (block != fd->sc_blkno) {
printf("fdcintr: block %d != blkno %d\n",
block, fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}
}
#endif
read = bp->b_flags & B_READ ? 1 : 0;
/*
* Setup pseudo-dma address & count
*/
fddmaaddr = bp->b_data + fd->sc_skip;
fddmalen = fd->sc_nbytes;
wrt_fdc_reg(fdctl, type->rate);
#ifdef FD_DEBUG
printf("fdcintr: %s drive %d track %d head %d sec %d"
" nblks %d\n", read ? "read" : "write",
fd->sc_drive, fd->sc_cylin, head, sec, nblks);
#endif
fdc_ienable();
if (finfo) {
/* formatting */
if (out_fdc(NE7CMD_FORMAT) < 0) {
fdc->sc_errors = 4;
fdcretry(fdc);
goto loop;
}
out_fdc((head << 2) | fd->sc_drive);
out_fdc(finfo->fd_formb_secshift);
out_fdc(finfo->fd_formb_nsecs);
out_fdc(finfo->fd_formb_gaplen);
out_fdc(finfo->fd_formb_fillbyte);
} else {
if (read)
out_fdc(NE7CMD_READ); /* READ */
else
out_fdc(NE7CMD_WRITE); /* WRITE */
out_fdc((head << 2) | fd->sc_drive);
out_fdc(fd->sc_cylin); /* track */
out_fdc(head); /* head */
out_fdc(sec + 1); /* sector +1 */
out_fdc(type->secsize); /* sector size */
out_fdc(sec + nblks); /* last sectors */
out_fdc(type->gap1); /* gap1 size */
out_fdc(type->datalen); /* data length */
}
fdc->sc_state = IOCOMPLETE;
disk_busy(&fd->sc_dk);
/* allow 2 seconds for operation */
timeout(fdctimeout, fdc, 2 * hz);
return 1; /* will return later */
case SEEKWAIT:
untimeout(fdctimeout, fdc);
fdc->sc_state = SEEKCOMPLETE;
/* allow 1/50 second for heads to settle */
timeout(fdcpseudointr, fdc, hz / 50);
return 1;
case SEEKCOMPLETE:
disk_unbusy(&fd->sc_dk, 0); /* no data on seek */
/* Make sure seek really happened. */
out_fdc(NE7CMD_SENSEI);
if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 ||
cyl != bp->b_cylinder * fd->sc_type->step) {
#ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 2, "seek failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = bp->b_cylinder;
goto doio;
case IOTIMEDOUT:
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdcretry(fdc);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fdctimeout, fdc);
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid));
if (fdcresult(fdc) != 7 || (st1 & 0x37) != 0) {
/*
* As the damn chip doesn't seem to have a FIFO,
* accept a few overruns as a fact of life *sigh*
*/
if ((st1 & 0x10) && (++fdc->sc_overruns < 4)) {
fdc->sc_state = DOSEEK;
goto loop;
}
#ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
"read failed" : "write failed");
printf("blkno %d nblks %d\n",
fd->sc_blkno, fd->sc_nblks);
#endif
fdcretry(fdc);
goto loop;
}
if (fdc->sc_errors) {
diskerr(bp, "fd", "soft error", LOG_PRINTF,
fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL);
printf("\n");
fdc->sc_errors = 0;
}
fdc->sc_overruns = 0;
fd->sc_blkno += fd->sc_nblks;
fd->sc_skip += fd->sc_nbytes;
fd->sc_bcount -= fd->sc_nbytes;
if (!finfo && fd->sc_bcount > 0) {
bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl;
goto doseek;
}
fdfinish(fd, bp);
goto loop;
case DORESET:
/* try a reset, keep motor on */
fd_set_motor(fdc, 1);
delay(100);
fd_set_motor(fdc, 0);
fdc->sc_state = RESETCOMPLETE;
timeout(fdctimeout, fdc, hz / 2);
return 1; /* will return later */
case RESETCOMPLETE:
untimeout(fdctimeout, fdc);
/* clear the controller output buffer */
for (i = 0; i < 4; i++) {
out_fdc(NE7CMD_SENSEI);
(void) fdcresult(fdc);
}
/* fall through */
case DORECAL:
fdc_ienable();
out_fdc(NE7CMD_RECAL); /* recalibrate function */
out_fdc(fd->sc_drive);
fdc->sc_state = RECALWAIT;
timeout(fdctimeout, fdc, 5 * hz);
return 1; /* will return later */
case RECALWAIT:
untimeout(fdctimeout, fdc);
fdc->sc_state = RECALCOMPLETE;
/* allow 1/30 second for heads to settle */
timeout(fdcpseudointr, fdc, hz / 30);
return 1; /* will return later */
case RECALCOMPLETE:
out_fdc(NE7CMD_SENSEI);
if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
#ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 2, "recalibrate failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = 0;
goto doseek;
case MOTORWAIT:
if (fd->sc_flags & FD_MOTOR_WAIT)
return 1; /* time's not up yet */
goto doseek;
default:
fdcstatus(&fd->sc_dev, 0, "stray interrupt");
return 1;
}
#ifdef DIAGNOSTIC
panic("fdcintr: impossible");
#endif
#undef st0
#undef st1
#undef cyl
}
void
fdcretry(fdc)
struct fdc_softc *fdc;
{
char bits[64];
struct fd_softc *fd;
struct buf *bp;
fd = fdc->sc_drives.tqh_first;
bp = BUFQ_FIRST(&fd->sc_q);
if (fd->sc_opts & FDOPT_NORETRY)
goto fail;
switch (fdc->sc_errors) {
case 0:
/* try again */
fdc->sc_state = DOSEEK;
break;
case 1: case 2: case 3:
/* didn't work; try recalibrating */
fdc->sc_state = DORECAL;
break;
case 4:
/* still no go; reset the bastard */
fdc->sc_state = DORESET;
break;
default:
fail:
if ((fd->sc_opts & FDOPT_SILENT) == 0) {
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fd->sc_skip / FDC_BSIZE,
(struct disklabel *)NULL);
printf(" (st0 %s",
bitmask_snprintf(fdc->sc_status[0],
NE7_ST0BITS, bits,
sizeof(bits)));
printf(" st1 %s",
bitmask_snprintf(fdc->sc_status[1],
NE7_ST1BITS, bits,
sizeof(bits)));
printf(" st2 %s",
bitmask_snprintf(fdc->sc_status[2],
NE7_ST2BITS, bits,
sizeof(bits)));
printf(" cyl %d head %d sec %d)\n",
fdc->sc_status[3],
fdc->sc_status[4],
fdc->sc_status[5]);
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
fdfinish(fd, bp);
}
fdc->sc_errors++;
}
int
fdsize(dev)
dev_t dev;
{
/* Swapping to floppies would not make sense. */
return -1;
}
int
fddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return ENXIO;
}
int
fdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
struct fd_softc *fd;
struct disklabel buffer;
int error;
struct fdformat_parms *form_parms;
struct fdformat_cmd *form_cmd;
struct ne7_fd_formb fd_formb;
unsigned int scratch;
int il[FD_MAX_NSEC + 1];
register int i, j;
fd = hdfd_cd.cd_devs[FDUNIT(dev)];
switch (cmd) {
case DIOCGDINFO:
fdgetdisklabel(fd, dev);
*(struct disklabel *)addr = *(fd->sc_dk.dk_label);
return 0;
case DIOCGPART:
fdgetdisklabel(fd, dev);
((struct partinfo *)addr)->disklab = fd->sc_dk.dk_label;
((struct partinfo *)addr)->part =
&fd->sc_dk.dk_label->d_partitions[RAW_PART];
return(0);
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
/* XXX do something */
return 0;
case DIOCSDINFO:
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(&buffer, (struct disklabel *)addr, 0,NULL);
if (error)
return error;
if (cmd == DIOCWDINFO)
error = writedisklabel(dev, fdstrategy, &buffer, NULL);
return error;
case FDIOCGETFORMAT:
form_parms = (struct fdformat_parms *)addr;
form_parms->fdformat_version = FDFORMAT_VERSION;
form_parms->nbps = 128 * (1 << fd->sc_type->secsize);
form_parms->ncyl = fd->sc_type->tracks;
form_parms->nspt = fd->sc_type->sectrac;
form_parms->ntrk = fd->sc_type->heads;
form_parms->stepspercyl = fd->sc_type->step;
form_parms->gaplen = fd->sc_type->gap2;
form_parms->fillbyte = fd->sc_type->fillbyte;
form_parms->interleave = fd->sc_type->interleave;
switch (fd->sc_type->rate) {
case FDC_500KBPS:
form_parms->xfer_rate = 500 * 1024;
break;
case FDC_300KBPS:
form_parms->xfer_rate = 300 * 1024;
break;
case FDC_250KBPS:
form_parms->xfer_rate = 250 * 1024;
break;
case FDC_125KBPS:
form_parms->xfer_rate = 125 * 1024;
break;
default:
return EINVAL;
}
return 0;
case FDIOCSETFORMAT:
if((flag & FWRITE) == 0)
return EBADF; /* must be opened for writing */
form_parms = (struct fdformat_parms *)addr;
if (form_parms->fdformat_version != FDFORMAT_VERSION)
return EINVAL; /* wrong version of formatting prog */
scratch = form_parms->nbps >> 7;
if ((form_parms->nbps & 0x7f) || ffs(scratch) == 0 ||
scratch & ~(1 << (ffs(scratch)-1)))
/* not a power-of-two multiple of 128 */
return EINVAL;
switch (form_parms->xfer_rate) {
case 500 * 1024:
fd->sc_type->rate = FDC_500KBPS;
break;
case 300 * 1024:
fd->sc_type->rate = FDC_300KBPS;
break;
case 250 * 1024:
fd->sc_type->rate = FDC_250KBPS;
break;
case 125 * 1024:
fd->sc_type->rate = FDC_125KBPS;
break;
default:
return EINVAL;
}
if (form_parms->nspt > FD_MAX_NSEC ||
form_parms->fillbyte > 0xff ||
form_parms->interleave > 0xff)
return EINVAL;
fd->sc_type->sectrac = form_parms->nspt;
if (form_parms->ntrk != 2 && form_parms->ntrk != 1)
return EINVAL;
fd->sc_type->heads = form_parms->ntrk;
fd->sc_type->seccyl = form_parms->nspt * form_parms->ntrk;
fd->sc_type->secsize = ffs(scratch)-1;
fd->sc_type->gap2 = form_parms->gaplen;
fd->sc_type->tracks = form_parms->ncyl;
fd->sc_type->size = fd->sc_type->seccyl * form_parms->ncyl *
form_parms->nbps / DEV_BSIZE;
fd->sc_type->step = form_parms->stepspercyl;
fd->sc_type->fillbyte = form_parms->fillbyte;
fd->sc_type->interleave = form_parms->interleave;
return 0;
case FDIOCFORMAT_TRACK:
if((flag & FWRITE) == 0)
return EBADF; /* must be opened for writing */
form_cmd = (struct fdformat_cmd *)addr;
if (form_cmd->formatcmd_version != FDFORMAT_VERSION)
return EINVAL; /* wrong version of formatting prog */
if (form_cmd->head >= fd->sc_type->heads ||
form_cmd->cylinder >= fd->sc_type->tracks) {
return EINVAL;
}
fd_formb.head = form_cmd->head;
fd_formb.cyl = form_cmd->cylinder;
fd_formb.transfer_rate = fd->sc_type->rate;
fd_formb.fd_formb_secshift = fd->sc_type->secsize;
fd_formb.fd_formb_nsecs = fd->sc_type->sectrac;
fd_formb.fd_formb_gaplen = fd->sc_type->gap2;
fd_formb.fd_formb_fillbyte = fd->sc_type->fillbyte;
bzero(il,sizeof il);
for (j = 0, i = 1; i <= fd_formb.fd_formb_nsecs; i++) {
while (il[(j%fd_formb.fd_formb_nsecs)+1])
j++;
il[(j%fd_formb.fd_formb_nsecs)+1] = i;
j += fd->sc_type->interleave;
}
for (i = 0; i < fd_formb.fd_formb_nsecs; i++) {
fd_formb.fd_formb_cylno(i) = form_cmd->cylinder;
fd_formb.fd_formb_headno(i) = form_cmd->head;
fd_formb.fd_formb_secno(i) = il[i+1];
fd_formb.fd_formb_secsize(i) = fd->sc_type->secsize;
}
case FDIOCGETOPTS: /* get drive options */
*(int *)addr = fd->sc_opts;
return 0;
case FDIOCSETOPTS: /* set drive options */
fd->sc_opts = *(int *)addr;
return 0;
default:
return ENOTTY;
}
#ifdef DIAGNOSTIC
panic("fdioctl: impossible");
#endif
}
int
fdformat(dev, finfo, p)
dev_t dev;
struct ne7_fd_formb *finfo;
struct proc *p;
{
int rv = 0, s;
struct fd_softc *fd = hdfd_cd.cd_devs[FDUNIT(dev)];
struct fd_type *type = fd->sc_type;
struct buf *bp;
/* set up a buffer header for fdstrategy() */
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
if(bp == 0)
return ENOBUFS;
PHOLD(p);
bzero((void *)bp, sizeof(struct buf));
bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
bp->b_proc = p;
bp->b_dev = dev;
/*
* calculate a fake blkno, so fdstrategy() would initiate a
* seek to the requested cylinder
*/
bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads)
+ finfo->head * type->sectrac) * FDC_BSIZE / DEV_BSIZE;
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->b_data = (caddr_t)finfo;
#ifdef DEBUG
printf("fdformat: blkno %x count %lx\n", bp->b_blkno, bp->b_bcount);
#endif
/* now do the format */
fdstrategy(bp);
/* ...and wait for it to complete */
s = splbio();
while(!(bp->b_flags & B_DONE)) {
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
if (rv == EWOULDBLOCK)
break;
}
splx(s);
if (rv == EWOULDBLOCK) {
/* timed out */
rv = EIO;
biodone(bp);
}
if(bp->b_flags & B_ERROR) {
rv = bp->b_error;
}
PRELE(p);
free(bp, M_TEMP);
return rv;
}
/*
* Obtain a disklabel. Either a real one from the disk or, if there
* is none, a fake one.
*/
static void
fdgetdisklabel(fd, dev)
struct fd_softc *fd;
dev_t dev;
{
struct disklabel *lp;
struct cpu_disklabel cpulab;
lp = fd->sc_dk.dk_label;
bzero(lp, sizeof(*lp));
bzero(&cpulab, sizeof(cpulab));
lp->d_secpercyl = fd->sc_type->seccyl;
lp->d_type = DTYPE_FLOPPY;
lp->d_secsize = FDC_BSIZE;
lp->d_secperunit = fd->sc_type->size;
/*
* If there is no label on the disk: fake one
*/
if (readdisklabel(dev, fdstrategy, lp, &cpulab) != NULL)
fdgetdefaultlabel(fd, lp, RAW_PART);
if ((FDC_BSIZE * fd->sc_type->size)
< (lp->d_secsize * lp->d_secperunit)) {
/*
* XXX: Ignore these fields. If you drop a vnddisk
* on more than one floppy, you'll get disturbing
* sounds!
*/
lp->d_secpercyl = fd->sc_type->seccyl;
lp->d_type = DTYPE_FLOPPY;
lp->d_secsize = FDC_BSIZE;
lp->d_secperunit = fd->sc_type->size;
}
}
/*
* Build defaultdisk label. For now we only create a label from what we
* know from 'sc'.
*/
static void
fdgetdefaultlabel(fd, lp, part)
struct fd_softc *fd;
struct disklabel *lp;
int part;
{
bzero(lp, sizeof(struct disklabel));
lp->d_secsize = 128 * (1 << fd->sc_type->secsize);
lp->d_ntracks = fd->sc_type->heads;
lp->d_nsectors = fd->sc_type->sectrac;
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
lp->d_ncylinders = fd->sc_type->size / lp->d_secpercyl;
lp->d_secperunit = fd->sc_type->size;
lp->d_type = DTYPE_FLOPPY;
lp->d_rpm = 300; /* good guess I suppose. */
lp->d_interleave = 1; /* FIXME: is this OK? */
lp->d_bbsize = 0;
lp->d_sbsize = 0;
lp->d_npartitions = part + 1;
lp->d_trkseek = 6000; /* Who cares... */
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
lp->d_partitions[part].p_size = lp->d_secperunit;
lp->d_partitions[part].p_fstype = FS_UNUSED;
lp->d_partitions[part].p_fsize = 1024;
lp->d_partitions[part].p_frag = 8;
}
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