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BSD 4_3_Tahoe release
[unix-history] / usr / src / sys / tahoevba / hd.c
/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Harris Corp.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)hd.c 7.4 (Berkeley) 5/1/89
* 9/8/89 (bostic) patched to include 7.6-7.8 but not 7.5
*/
#include "hd.h"
#if NHD > 0
#include "param.h"
#include "buf.h"
#include "conf.h"
#include "dir.h"
#include "dkstat.h"
#include "disklabel.h"
#include "file.h"
#include "systm.h"
#include "vmmac.h"
#include "time.h"
#include "proc.h"
#include "uio.h"
#include "syslog.h"
#include "kernel.h"
#include "ioctl.h"
#include "stat.h"
#include "errno.h"
#include "../tahoe/cpu.h"
#include "../tahoe/mtpr.h"
#include "../tahoevba/vbavar.h"
#include "../tahoevba/hdreg.h"
#define b_cylin b_resid
#define hdunit(dev) (minor(dev)>>3)
#define hdpart(dev) (minor(dev)&0x07)
#define hdminor(unit, part) (((unit)<<3)|(part))
struct vba_ctlr *hdcminfo[NHDC];
struct vba_device *hddinfo[NHD];
int hdcprobe(), hdslave(), hdattach(), hddgo(), hdstrategy();
long hdstd[] = { 0 };
struct vba_driver hdcdriver =
{ hdcprobe, hdslave, hdattach, hddgo, hdstd, "hd", hddinfo, "hdc", hdcminfo };
/*
* Per-controller state.
*/
struct hdcsoftc {
u_short hdc_flags;
#define HDC_INIT 0x01 /* controller initialized */
#define HDC_STARTED 0x02 /* start command issued */
#define HDC_LOCKED 0x04 /* locked for direct controller access */
#define HDC_WAIT 0x08 /* someone needs direct controller access */
u_short hdc_wticks; /* timeout */
struct master_mcb *hdc_mcbp; /* address of controller mcb */
struct registers *hdc_reg; /* base address of i/o regs */
struct vb_buf hdc_rbuf; /* vba resources */
struct master_mcb hdc_mcb; /* controller mcb */
} hdcsoftc[NHDC];
#define HDCMAXTIME 20 /* max time for operation, sec. */
#define HDCINTERRUPT 0xf0 /* interrupt vector */
/*
* Per-drive state; probably everything should be "hd_", not "dk_",
* but it's not worth it, and dk is a better mnemonic for disk anyway.
*/
struct dksoftc {
#ifdef COMPAT_42
u_short dk_def_cyl; /* definition track cylinder address */
#endif
int dk_state; /* open fsm */
u_short dk_bshift; /* shift for * (DEV_BSIZE / sectorsize) XXX */
int dk_wlabel; /* if label sector is writeable */
u_long dk_copenpart; /* character units open on this drive */
u_long dk_bopenpart; /* block units open on this drive */
u_long dk_openpart; /* all units open on this drive */
int dk_unit; /* unit# */
int dk_ctlr; /* controller# */
int dk_format; /* if format program is using disk */
struct buf dk_utab; /* i/o queue header */
struct disklabel dk_label; /* disklabel for this disk */
struct mcb dk_mcb; /* disk mcb */
} dksoftc[NHD];
/*
* Drive states. Used during steps of open/initialization.
* States < OPEN (> 0) are transient, during an open operation.
* OPENRAW is used for unlabeled disks, to allow format operations.
*/
#define CLOSED 0 /* disk is closed */
#define WANTOPEN 1 /* open requested, not started */
#define WANTOPENRAW 2 /* open requested, no label */
#define RDLABEL 3 /* reading pack label */
#define OPEN 4 /* intialized and ready */
#define OPENRAW 5 /* open, no label */
int hdcwstart, hdcwatch();
/* see if the controller is really there, if so, init it. */
/* ARGSUSED */
hdcprobe(reg, vm)
caddr_t reg;
/* register */ struct vba_ctlr *vm;
{
register int br, cvec; /* must be r12, r11 */
register struct hdcsoftc *hdc;
static struct module_id id;
struct pte *dummypte;
caddr_t putl;
/* initialize the hdc controller structure. */
hdc = &hdcsoftc[vm->um_ctlr];
if (!vbmemalloc(1, reg, &dummypte, &putl)) {
printf("hdc%d: vbmemalloc failed.\n", vm->um_ctlr);
return(0);
}
hdc->hdc_reg = (struct registers *)putl;
/*
* try and ping the MID register; side effect of wbadaddr is to read
* the module id; the controller is bad if it's not an hdc, the hdc's
* writeable control store is not loaded, or the hdc failed the
* functional integrity test;
*/
if (wbadaddr(&hdc->hdc_reg->module_id, 4,
vtoph((struct process *)NULL, &id)))
return(0);
DELAY(10000);
mtpr(PADC, 0);
if (id.module_id != (u_char)HDC_MID) {
printf("hdc%d: bad module id; id = %x.\n",
vm->um_ctlr, id.module_id);
return(0);
}
if (id.code_rev == (u_char)0xff) {
printf("hdc%d: micro-code not loaded.\n", vm->um_ctlr);
return(0);
}
if (id.fit != (u_char)0xff) {
printf("hdc%d: FIT test failed.\n", vm->um_ctlr);
return(0);
}
/* reset that pup; flag as inited */
hdc->hdc_reg->soft_reset = 0;
DELAY(1000000);
hdc->hdc_flags |= HDC_INIT;
/* allocate page tables and i/o buffer. */
if (!vbainit(&hdc->hdc_rbuf, MAXPHYS, VB_32BIT|VB_SCATTER)) {
printf("hdc%d: vbainit failed\n", vm->um_ctlr);
return (0);
}
/* set pointer to master control block */
hdc->hdc_mcbp =
(struct master_mcb *)vtoph((struct proc *)NULL, &hdc->hdc_mcb);
br = 0x17, cvec = HDCINTERRUPT + vm->um_ctlr; /* XXX */
return(sizeof(struct registers));
}
/* ARGSUSED */
hdslave(vi, vdaddr)
struct vba_device *vi;
struct vddevice *vdaddr;
{
register struct mcb *mcb;
register struct disklabel *lp;
register struct dksoftc *dk;
static struct status status;
dk = &dksoftc[vi->ui_unit];
dk->dk_unit = vi->ui_unit;
dk->dk_ctlr = vi->ui_ctlr;
mcb = &dk->dk_mcb;
mcb->command = HCMD_STATUS;
mcb->chain[0].wcount = sizeof(struct status) / sizeof(long);
mcb->chain[0].memadr = (u_long)vtoph((struct process *)0, &status);
if (hdimcb(dk)) {
printf(" (no status)\n");
return(0);
}
/*
* Report the drive down if anything in the drive status looks bad.
* If the drive is offline and it is not on cylinder, then the drive
* is not there. If there is a fault condition, the hdc will try to
* clear it when we read the disklabel information.
*/
if (!(status.drs&DRS_ONLINE)) {
if (status.drs&DRS_ON_CYLINDER)
printf(" (not online)\n");
return(0);
}
if (status.drs&DRS_FAULT)
printf(" (clearing fault)");
lp = &dk->dk_label;
#ifdef RAW_SIZE
lp->d_secsize = status.bytes_per_sec;
#else
lp->d_secsize = 512;
#endif
lp->d_nsectors = status.max_sector + 1;
lp->d_ntracks = status.max_head + 1;
lp->d_ncylinders = status.max_cyl + 1;
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
lp->d_npartitions = 1;
lp->d_partitions[0].p_offset = 0;
lp->d_partitions[0].p_size = LABELSECTOR + 1;
lp->d_rpm = status.rpm;
lp->d_typename[0] = 'h';
lp->d_typename[1] = 'd';
lp->d_typename[2] = '\0';
#ifdef COMPAT_42
dk->dk_def_cyl = status.def_cyl;
#endif
return(1);
}
hdattach(vi)
register struct vba_device *vi;
{
register struct dksoftc *dk;
register struct disklabel *lp;
register int unit;
unit = vi->ui_unit;
if (hdinit(hdminor(unit, 0), 0)) {
printf(": unknown drive type");
return;
}
dk = &dksoftc[unit];
lp = &dk->dk_label;
hd_setsecsize(dk, lp);
if (dk->dk_state == OPEN)
printf(": %s <secsize %d, ntrak %d, ncyl %d, nsec %d>",
lp->d_typename, lp->d_secsize, lp->d_ntracks,
lp->d_ncylinders, lp->d_nsectors);
/*
* (60 / rpm) / (sectors per track * (bytes per sector / 2))
*/
if (vi->ui_dk >= 0)
dk_mspw[vi->ui_dk] = 120.0 /
(lp->d_rpm * lp->d_nsectors * lp->d_secsize);
#ifdef notyet
addswap(makedev(HDMAJOR, hdminor(unit, 0)), lp);
#endif
}
hdopen(dev, flags, fmt)
dev_t dev;
int flags, fmt;
{
register struct disklabel *lp;
register struct dksoftc *dk;
register struct partition *pp;
register int unit;
struct vba_device *vi;
int s, error, part = hdpart(dev), mask = 1 << part;
daddr_t start, end;
unit = hdunit(dev);
if (unit >= NHD || (vi = hddinfo[unit]) == 0 || vi->ui_alive == 0)
return(ENXIO);
dk = &dksoftc[unit];
lp = &dk->dk_label;
s = spl7();
while (dk->dk_state != OPEN && dk->dk_state != OPENRAW &&
dk->dk_state != CLOSED)
sleep((caddr_t)dk, PZERO+1);
splx(s);
if (dk->dk_state != OPEN && dk->dk_state != OPENRAW)
if (error = hdinit(dev, flags))
return(error);
if (hdcwstart == 0) {
timeout(hdcwatch, (caddr_t)0, hz);
hdcwstart++;
}
/*
* Warn if a partion is opened that overlaps another partition
* which is open unless one is the "raw" partition (whole disk).
*/
#define RAWPART 8 /* 'x' partition */ /* XXX */
if ((dk->dk_openpart & mask) == 0 && part != RAWPART) {
pp = &lp->d_partitions[part];
start = pp->p_offset;
end = pp->p_offset + pp->p_size;
for (pp = lp->d_partitions;
pp < &lp->d_partitions[lp->d_npartitions]; pp++) {
if (pp->p_offset + pp->p_size <= start ||
pp->p_offset >= end)
continue;
if (pp - lp->d_partitions == RAWPART)
continue;
if (dk->dk_openpart & (1 << (pp - lp->d_partitions)))
log(LOG_WARNING,
"hd%d%c: overlaps open partition (%c)\n",
unit, part + 'a',
pp - lp->d_partitions + 'a');
}
}
if (part >= lp->d_npartitions)
return(ENXIO);
dk->dk_openpart |= mask;
switch (fmt) {
case S_IFCHR:
dk->dk_copenpart |= mask;
break;
case S_IFBLK:
dk->dk_bopenpart |= mask;
break;
}
return(0);
}
/* ARGSUSED */
hdclose(dev, flags, fmt)
dev_t dev;
int flags, fmt;
{
register struct dksoftc *dk;
int mask;
dk = &dksoftc[hdunit(dev)];
mask = 1 << hdpart(dev);
switch (fmt) {
case S_IFCHR:
dk->dk_copenpart &= ~mask;
break;
case S_IFBLK:
dk->dk_bopenpart &= ~mask;
break;
}
if (((dk->dk_copenpart | dk->dk_bopenpart) & mask) == 0)
dk->dk_openpart &= ~mask;
/*
* Should wait for i/o to complete on this partition
* even if others are open, but wait for work on blkflush().
*/
if (dk->dk_openpart == 0) {
int s = spl7();
while (dk->dk_utab.b_actf)
sleep((caddr_t)dk, PZERO-1);
splx(s);
dk->dk_state = CLOSED;
dk->dk_wlabel = 0;
}
return(0);
}
hdinit(dev, flags)
dev_t dev;
int flags;
{
register struct dksoftc *dk;
register struct disklabel *lp;
struct vba_device *vi;
int error, unit;
char *msg, *readdisklabel();
extern int cold;
vi = hddinfo[unit = hdunit(dev)];
dk = &dksoftc[unit];
dk->dk_unit = vi->ui_slave;
dk->dk_ctlr = vi->ui_ctlr;
if (flags & O_NDELAY) {
dk->dk_state = OPENRAW;
return(0);
}
error = 0;
lp = &dk->dk_label;
dk->dk_state = RDLABEL;
if (msg = readdisklabel(dev, hdstrategy, lp)) {
if (cold) {
printf(": %s\n", msg);
dk->dk_state = CLOSED;
} else {
log(LOG_ERR, "hd%d: %s\n", unit, msg);
dk->dk_state = OPENRAW;
}
#ifdef COMPAT_42
hdclock(vi->ui_ctlr);
if (!(error = hdreadgeometry(dk)))
dk->dk_state = OPEN;
hdcunlock(vi->ui_ctlr);
#endif
} else
dk->dk_state = OPEN;
wakeup((caddr_t)dk);
return(error);
}
hd_setsecsize(dk, lp)
register struct dksoftc *dk;
struct disklabel *lp;
{
register int mul;
/*
* Calculate scaling shift for mapping
* DEV_BSIZE blocks to drive sectors.
*/
mul = DEV_BSIZE / lp->d_secsize;
dk->dk_bshift = 0;
while ((mul >>= 1) > 0)
dk->dk_bshift++;
}
/* ARGSUSED */
hddgo(vm)
struct vba_device *vm;
{}
extern int name_ext;
hdstrategy(bp)
register struct buf *bp;
{
register struct vba_device *vi;
register struct disklabel *lp;
register struct dksoftc *dk;
struct buf *dp;
register int unit;
daddr_t sn, sz, maxsz;
int part, s;
vi = hddinfo[unit = hdunit(bp->b_dev)];
if (unit >= NHD || vi == 0 || vi->ui_alive == 0) {
bp->b_error = ENXIO;
goto bad;
}
dk = &dksoftc[unit];
if (dk->dk_state < OPEN)
goto q;
if (dk->dk_state != OPEN && (bp->b_flags & B_READ) == 0) {
bp->b_error = EROFS;
goto bad;
}
part = hdpart(bp->b_dev);
if ((dk->dk_openpart & (1 << part)) == 0) {
bp->b_error = ENODEV;
goto bad;
}
lp = &dk->dk_label;
sz = (bp->b_bcount + lp->d_secsize - 1) / lp->d_secsize;
maxsz = lp->d_partitions[part].p_size;
sn = bp->b_blkno << dk->dk_bshift;
if (sn + lp->d_partitions[part].p_offset <= LABELSECTOR &&
#if LABELSECTOR != 0
sn + lp->d_partitions[part].p_offset + sz > LABELSECTOR &&
#endif
(bp->b_flags & B_READ) == 0 && dk->dk_wlabel == 0) {
bp->b_error = EROFS;
goto bad;
}
if (sn < 0 || sn + sz > maxsz) {
if (sn == maxsz) {
bp->b_resid = bp->b_bcount;
goto done;
}
sz = maxsz - sn;
if (sz <= 0) {
bp->b_error = EINVAL;
goto bad;
}
bp->b_bcount = sz * lp->d_secsize;
}
bp->b_cylin = (sn + lp->d_partitions[part].p_offset) / lp->d_secpercyl;
q: s = spl7();
dp = &dk->dk_utab;
disksort(dp, bp);
if (!dp->b_active) {
(void)hdustart(vi);
if (!vi->ui_mi->um_tab.b_active)
hdcstart(vi->ui_mi);
}
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
biodone(bp);
}
hdustart(vi)
register struct vba_device *vi;
{
register struct buf *bp, *dp;
register struct vba_ctlr *vm;
register struct dksoftc *dk;
dk = &dksoftc[vi->ui_unit];
dp = &dk->dk_utab;
/* if queue empty, nothing to do. impossible? */
if (dp->b_actf == NULL)
return;
/* place on controller transfer queue */
vm = vi->ui_mi;
if (vm->um_tab.b_actf == NULL)
vm->um_tab.b_actf = dp;
else
vm->um_tab.b_actl->b_forw = dp;
vm->um_tab.b_actl = dp;
dp->b_forw = NULL;
dp->b_active++;
}
hdcstart(vm)
register struct vba_ctlr *vm;
{
register struct buf *bp;
register struct dksoftc *dk;
register struct disklabel *lp;
register struct master_mcb *master;
register struct mcb *mcb;
struct vba_device *vi;
struct hdcsoftc *hdc;
struct buf *dp;
int sn;
/* pull a request off the controller queue */
for (;;) {
if ((dp = vm->um_tab.b_actf) == NULL)
return;
if (bp = dp->b_actf)
break;
vm->um_tab.b_actf = dp->b_forw;
}
/* mark controller active */
vm->um_tab.b_active++;
vi = hddinfo[hdunit(bp->b_dev)];
dk = &dksoftc[vi->ui_unit];
lp = &dk->dk_label;
sn = bp->b_blkno << dk->dk_bshift;
/* fill in mcb */
mcb = &dk->dk_mcb;
mcb->forw_phaddr = 0;
/* mcb->priority = 0; */
mcb->interrupt = 1;
mcb->command = (bp->b_flags & B_READ) ? HCMD_READ:HCMD_WRITE;
mcb->cyl = bp->b_cylin;
/* assumes partition starts on cylinder boundary */
mcb->head = (sn / lp->d_nsectors) % lp->d_ntracks;
mcb->sector = sn % lp->d_nsectors;
mcb->drive = vi->ui_slave;
/* mcb->context = 0; /* what do we want on interrupt? */
hdc = &hdcsoftc[vm->um_ctlr];
if (!hd_sgsetup(bp, &hdc->hdc_rbuf, mcb->chain)) {
mcb->chain[0].wcount = (bp->b_bcount+3) >> 2;
mcb->chain[0].memadr =
vbasetup(bp, &hdc->hdc_rbuf, (int)lp->d_secsize);
}
if (vi->ui_dk >= 0) {
dk_busy |= 1<<vi->ui_dk;
dk_xfer[vi->ui_dk]++;
dk_wds[vi->ui_dk] += bp->b_bcount>>6;
}
master = &hdc->hdc_mcb;
master->mcw = MCL_QUEUED;
master->interrupt = HDCINTERRUPT + vm->um_ctlr;
master->forw_phaddr = (u_long)vtoph((struct proc *)NULL, mcb);
hdc->hdc_reg->master_mcb = (u_long)hdc->hdc_mcbp;
}
/*
* Wait for controller to finish current operation
* so that direct controller accesses can be done.
*/
hdclock(ctlr)
int ctlr;
{
register struct vba_ctlr *vm = hdcminfo[ctlr];
register struct hdcsoftc *hdc;
int s;
hdc = &hdcsoftc[ctlr];
s = spl7();
while (vm->um_tab.b_active || hdc->hdc_flags & HDC_LOCKED) {
hdc->hdc_flags |= HDC_WAIT;
sleep((caddr_t)hdc, PRIBIO);
}
hdc->hdc_flags |= HDC_LOCKED;
splx(s);
}
/*
* Continue normal operations after pausing for
* munging the controller directly.
*/
hdcunlock(ctlr)
int ctlr;
{
register struct vba_ctlr *vm;
register struct hdcsoftc *hdc = &hdcsoftc[ctlr];
hdc->hdc_flags &= ~HDC_LOCKED;
if (hdc->hdc_flags & HDC_WAIT) {
hdc->hdc_flags &= ~HDC_WAIT;
wakeup((caddr_t)hdc);
} else {
vm = hdcminfo[ctlr];
if (vm->um_tab.b_actf)
hdcstart(vm);
}
}
hdintr(ctlr)
int ctlr;
{
register struct buf *bp, *dp;
register struct vba_ctlr *vm;
register struct vba_device *vi;
register struct hdcsoftc *hdc;
register struct mcb *mcb;
struct master_mcb *master;
register int status;
int timedout;
struct dksoftc *dk;
hdc = &hdcsoftc[ctlr];
master = &hdc->hdc_mcb;
uncache(&master->mcs);
uncache(&master->context);
vm = hdcminfo[ctlr];
if (!vm->um_tab.b_active || !(master->mcs&MCS_DONE)) {
printf("hd%d: stray interrupt\n", ctlr);
return;
}
dp = vm->um_tab.b_actf;
bp = dp->b_actf;
vi = hddinfo[hdunit(bp->b_dev)];
dk = &dksoftc[vi->ui_unit];
if (vi->ui_dk >= 0)
dk_busy &= ~(1<<vi->ui_dk);
timedout = (hdc->hdc_wticks >= HDCMAXTIME);
mcb = &dk->dk_mcb;
if (master->mcs & (MCS_SOFTERROR | MCS_FATALERROR) || timedout)
hdcerror(ctlr, *(u_long *)master->xstatus);
else
hdc->hdc_wticks = 0;
if (vm->um_tab.b_active) {
vm->um_tab.b_active = 0;
vm->um_tab.b_actf = dp->b_forw;
dp->b_active = 0;
dp->b_errcnt = 0;
dp->b_actf = bp->av_forw;
bp->b_resid = 0;
vbadone(bp, &hdc->hdc_rbuf);
biodone(bp);
/* start up now, if more work to do */
if (dp->b_actf)
hdustart(vi);
else if (dk->dk_openpart == 0)
wakeup((caddr_t)dk);
}
/* if there are devices ready to transfer, start the controller. */
if (hdc->hdc_flags & HDC_WAIT) {
hdc->hdc_flags &= ~HDC_WAIT;
wakeup((caddr_t)hdc);
} else if (vm->um_tab.b_actf)
hdcstart(vm);
}
hdioctl(dev, cmd, data, flag)
dev_t dev;
int cmd, flag;
caddr_t data;
{
register int unit;
register struct dksoftc *dk;
register struct disklabel *lp;
int error;
unit = hdunit(dev);
dk = &dksoftc[unit];
lp = &dk->dk_label;
error = 0;
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)data = *lp;
break;
case DIOCGPART:
((struct partinfo *)data)->disklab = lp;
((struct partinfo *)data)->part =
&lp->d_partitions[hdpart(dev)];
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
error = EBADF;
else
error = setdisklabel(lp, (struct disklabel *)data,
(dk->dk_state == OPENRAW) ? 0 : dk->dk_openpart);
if (error == 0 && dk->dk_state == OPENRAW)
dk->dk_state = OPEN;
break;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
error = EBADF;
else
dk->dk_wlabel = *(int *)data;
break;
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
error = EBADF;
else if ((error = setdisklabel(lp, (struct disklabel *)data,
(dk->dk_state == OPENRAW) ? 0 : dk->dk_openpart)) == 0) {
int wlab;
if (error == 0 && dk->dk_state == OPENRAW)
dk->dk_state = OPEN;
/* simulate opening partition 0 so write succeeds */
dk->dk_openpart |= (1 << 0); /* XXX */
wlab = dk->dk_wlabel;
dk->dk_wlabel = 1;
error = writedisklabel(dev, hdstrategy, lp);
dk->dk_openpart = dk->dk_copenpart | dk->dk_bopenpart;
dk->dk_wlabel = wlab;
}
break;
default:
error = ENOTTY;
break;
}
return (error);
}
/*
* Watch for lost interrupts.
*/
hdcwatch()
{
register struct hdcsoftc *hdc;
register struct vba_ctlr **vmp;
register int ctlr;
int s;
timeout(hdcwatch, (caddr_t)0, hz);
for (vmp = hdcminfo, hdc = hdcsoftc, ctlr = 0; ctlr < NHDC;
++ctlr, ++vmp, ++hdc) {
if (*vmp == 0 || (*vmp)->um_alive == 0)
continue;
s = spl7();
if ((*vmp)->um_tab.b_active &&
hdc->hdc_wticks++ >= HDCMAXTIME) {
printf("hd%d: lost interrupt\n", ctlr);
hdintr(ctlr);
}
splx(s);
}
}
hddump(dev)
dev_t dev;
{
return(ENXIO);
}
hdsize(dev)
dev_t dev;
{
register int unit = hdunit(dev);
register struct dksoftc *dk;
struct vba_device *vi;
struct disklabel *lp;
if (unit >= NHD || (vi = hddinfo[unit]) == 0 || vi->ui_alive == 0 ||
(dk = &dksoftc[unit])->dk_state != OPEN)
return (-1);
lp = &dk->dk_label;
return ((int)lp->d_partitions[hdpart(dev)].p_size >> dk->dk_bshift);
}
hdimcb(dk)
register struct dksoftc *dk;
{
register struct master_mcb *master;
register struct mcb *mcb;
register struct hdcsoftc *hdc;
int timeout;
/* fill in mcb */
mcb = &dk->dk_mcb;
mcb->interrupt = 0;
mcb->forw_phaddr = 0;
mcb->drive = dk->dk_unit;
hdc = &hdcsoftc[dk->dk_ctlr];
master = &hdc->hdc_mcb;
/* fill in master mcb */
master->mcw = MCL_IMMEDIATE;
master->forw_phaddr = (u_long)vtoph((struct proc *)NULL, mcb);
master->mcs = 0;
/* kick controller and wait */
hdc->hdc_reg->master_mcb = (u_long)hdc->hdc_mcbp;
for (timeout = 15000; timeout; --timeout) {
DELAY(1000);
mtpr(PADC, 0);
if (master->mcs&MCS_FATALERROR) {
printf("hdc%d: fatal error\n", dk->dk_ctlr);
hdcerror(dk->dk_ctlr, *(u_long *)master->xstatus);
return(1);
}
if (master->mcs&MCS_DONE)
return(0);
}
printf("hdc%d: timed out\n", dk->dk_ctlr);
return(1);
}
hdcerror(ctlr, code)
int ctlr;
u_long code;
{
printf("hd%d: error %lx\n", ctlr, code);
}
#ifdef COMPAT_42
hdreadgeometry(dk)
struct dksoftc *dk;
{
static geometry_sector geometry;
register struct mcb *mcb;
register struct disklabel *lp;
geometry_block *geo;
int cnt;
/*
* Read the geometry block (at head = 0 sector = 0 of the drive
* definition cylinder), validate it (must have the correct version
* number, header, and checksum).
*/
mcb = &dk->dk_mcb;
mcb->command = HCMD_READ;
mcb->cyl = dk->dk_def_cyl;
mcb->head = 0;
mcb->sector = 0;
mcb->chain[0].wcount = sizeof(geometry_sector) / sizeof(long);
mcb->chain[0].memadr = (u_long)vtoph((struct process *)0, &geometry);
/* mcb->chain[0].memadr = (long)&geometry; */
if (hdimcb(dk)) {
printf("hd%d: can't read default geometry.\n", dk->dk_unit);
return(1);
}
geo = &geometry.geometry_block;
if (geo->version > 64000 || geo->version < 0) {
printf("hd%d: bad default geometry version#.\n", dk->dk_unit);
return(1);
}
if (bcmp(&geo->id[0], GB_ID, GB_ID_LEN)) {
printf("hd%d: bad default geometry header.\n", dk->dk_unit);
return(1);
}
GB_CHECKSUM(geo, cnt);
if (geometry.checksum != cnt) {
printf("hd%d: bad default geometry checksum.\n", dk->dk_unit);
return(1);
}
lp = &dk->dk_label;
/* 1K block in Harris geometry; convert to sectors for disklabels */
for (cnt = 0; cnt < GB_MAXPART; cnt++) {
lp->d_partitions[cnt].p_offset =
geo->partition[cnt].start * (1024 / lp->d_secsize);
lp->d_partitions[cnt].p_size =
geo->partition[cnt].length * (1024 / lp->d_secsize);
}
lp->d_npartitions = GB_MAXPART;
return(0);
}
#endif /* COMPAT_42 */
#endif /* NHD */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.