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remove debug stuff
[unix-history] / usr / src / sys / pmax / dev / rz.c
/*
* Copyright (c) 1992 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell.
*
* %sccs.include.redist.c%
*
* @(#)rz.c 7.2 (Berkeley) %G%
*/
/*
* SCSI CCS (Command Command Set) disk driver.
* NOTE: The name was changed from "sd" to "rz" for DEC compatibility.
* I guess I can't avoid confusion someplace.
*/
#include "rz.h"
#if NRZ > 0
#include "param.h"
#include "systm.h"
#include "buf.h"
#include "errno.h"
#include "dkstat.h"
#include "disklabel.h"
#include "malloc.h"
#include "device.h"
#include "scsi.h"
#include "devDiskLabel.h"
#include "proc.h"
#include "uio.h"
extern void printf();
extern void bcopy();
extern void disksort();
extern int splbio();
extern void splx();
extern int physio();
int rzprobe();
void rzstrategy(), rzstart(), rzdone();
struct driver rzdriver = {
"rz", rzprobe, rzstart, rzdone,
};
struct size {
u_long strtblk;
u_long endblk;
int nblocks;
};
struct rzinfo {
struct size part[8];
};
/*
* Since the SCSI standard tends to hide the disk structure, we define
* partitions in terms of DEV_BSIZE blocks. The default partition table
* (for an unlabeled disk) reserves 512K for a boot area, has an 8 meg
* root and 32 meg of swap. The rest of the space on the drive goes in
* the G partition. As usual, the C partition covers the entire disk
* (including the boot area).
*/
struct rzinfo rzdefaultpart = {
1024, 17408, 16384 , /* A */
17408, 82944, 65536 , /* B */
0, 0, 0 , /* C */
17408, 115712, 98304 , /* D */
115712, 218112, 102400 , /* E */
218112, 0, 0 , /* F */
82944, 0, 0 , /* G */
115712, 0, 0 , /* H */
};
struct rzstats {
long rzresets;
long rztransfers;
long rzpartials;
};
struct rz_softc {
struct scsi_device *sc_sd; /* physical unit info */
int sc_format_pid; /* process using "format" mode */
short sc_flags; /* see below */
short sc_type; /* drive type from INQUIRY cmd */
u_int sc_blks; /* number of blocks on device */
int sc_blksize; /* device block size in bytes */
int sc_bshift; /* convert device blocks to DEV_BSIZE */
u_int sc_wpms; /* average xfer rate in 16bit wds/sec */
struct rzinfo sc_info; /* drive partition table & label info */
struct rzstats sc_stats; /* statisic counts */
struct buf sc_tab; /* queue of pending operations */
struct buf sc_buf; /* buf for doing I/O */
struct buf sc_errbuf; /* buf for doing REQUEST_SENSE */
struct ScsiCmd sc_cmd; /* command for controller */
ScsiGroup1Cmd sc_rwcmd; /* SCSI cmd if not in "format" mode */
struct scsi_fmt_cdb sc_cdb; /* SCSI cmd if in "format" mode */
struct scsi_fmt_sense sc_sense; /* sense data from last cmd */
} rz_softc[NRZ];
/* sc_flags values */
#define RZF_ALIVE 0x1 /* drive found and ready */
#define RZF_SENSEINPROGRESS 0x2 /* REQUEST_SENSE command in progress */
#ifdef DEBUG
int rzdebug = 3;
#define RZB_ERROR 0x01
#define RZB_PARTIAL 0x02
#define RZB_PRLABEL 0x04
#endif
#define rzunit(x) ((minor(x) >> 3) & 0x7)
#define rzpart(x) (minor(x) & 0x7)
#define b_cylin b_resid
/*
* Table of scsi commands users are allowed to access via "format" mode.
* 0 means not legal.
* 1 means legal.
*/
static char legal_cmds[256] = {
/***** 0 1 2 3 4 5 6 7 8 9 A B C D E F */
/*00*/ 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*10*/ 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
/*20*/ 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*30*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*40*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*50*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*60*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*70*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*80*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*90*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*a0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*b0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*c0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*d0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*e0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/*f0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
/*
* Test to see if device is present.
* Return true if found and initialized ok.
*/
rzprobe(sd)
register struct scsi_device *sd;
{
register struct rz_softc *sc = &rz_softc[sd->sd_unit];
register int tries, i;
ScsiInquiryData inqbuf;
u_char capbuf[8];
ScsiClass7Sense *sp;
/* init some parameters that don't change */
sc->sc_sd = sd;
sc->sc_cmd.sd = sd;
sc->sc_cmd.unit = sd->sd_unit;
sc->sc_rwcmd.unitNumber = sd->sd_slave;
/* try to find out what type of device this is */
sc->sc_format_pid = 1; /* force use of sc_cdb */
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
scsiGroup0Cmd(SCSI_INQUIRY, sd->sd_slave, 0, sizeof(inqbuf),
(ScsiGroup0Cmd *)sc->sc_cdb.cdb);
sc->sc_buf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_buf.b_bcount = sizeof(inqbuf);
sc->sc_buf.b_un.b_addr = (caddr_t)&inqbuf;
sc->sc_buf.av_forw = (struct buf *)0;
sc->sc_tab.b_actf = sc->sc_tab.b_actl = &sc->sc_buf;
rzstart(sd->sd_unit);
if (biowait(&sc->sc_buf) ||
(i = sizeof(inqbuf) - sc->sc_buf.b_resid) < 5)
goto bad;
switch (inqbuf.type) {
case SCSI_DISK_TYPE: /* disk */
case SCSI_WORM_TYPE: /* WORM */
case SCSI_ROM_TYPE: /* CD-ROM */
case SCSI_OPTICAL_MEM_TYPE: /* Magneto-optical */
break;
default: /* not a disk */
goto bad;
}
sc->sc_type = inqbuf.type;
/* see if device is ready */
for (tries = 10; ; ) {
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
scsiGroup0Cmd(SCSI_TEST_UNIT_READY, sd->sd_slave, 0, 0,
(ScsiGroup0Cmd *)sc->sc_cdb.cdb);
sc->sc_buf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_buf.b_bcount = 0;
sc->sc_buf.b_un.b_addr = (caddr_t)0;
sc->sc_buf.av_forw = (struct buf *)0;
sc->sc_tab.b_actf = sc->sc_tab.b_actl = &sc->sc_buf;
sc->sc_cmd.cmd = sc->sc_cdb.cdb;
sc->sc_cmd.cmdlen = sc->sc_cdb.len;
sc->sc_cmd.buf = (caddr_t)0;
sc->sc_cmd.buflen = 0;
/* setup synchronous data transfers if the device supports it */
if (tries == 10 && (inqbuf.flags & SCSI_SYNC))
sc->sc_cmd.flags = SCSICMD_USE_SYNC;
else
sc->sc_cmd.flags = 0;
(*sc->sc_sd->sd_cdriver->d_start)(&sc->sc_cmd);
if (!biowait(&sc->sc_buf))
break;
if (--tries < 0)
goto bad;
if (!(sc->sc_sense.status & SCSI_STATUS_CHECKCOND))
goto again;
sp = (ScsiClass7Sense *)sc->sc_sense.sense;
if (sp->error7 != 0x70)
goto again;
if (sp->key == SCSI_CLASS7_UNIT_ATTN && tries != 9) {
/* drive recalibrating, give it a while */
DELAY(1000000);
continue;
}
if (sp->key == SCSI_CLASS7_NOT_READY) {
ScsiStartStopCmd *cp;
/* try to spin-up disk with start/stop command */
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
cp = (ScsiStartStopCmd *)sc->sc_cdb.cdb;
cp->command = SCSI_START_STOP;
cp->unitNumber = sd->sd_slave;
cp->immed = 0;
cp->loadEject = 0;
cp->start = 1;
cp->pad1 = 0;
cp->pad2 = 0;
cp->pad3 = 0;
cp->pad4 = 0;
cp->control = 0;
sc->sc_buf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_buf.b_bcount = 0;
sc->sc_buf.b_un.b_addr = (caddr_t)0;
sc->sc_buf.av_forw = (struct buf *)0;
sc->sc_tab.b_actf = sc->sc_tab.b_actl = &sc->sc_buf;
rzstart(sd->sd_unit);
if (biowait(&sc->sc_buf))
goto bad;
continue;
}
again:
DELAY(1000);
}
/* find out how big a disk this is */
sc->sc_cdb.len = sizeof(ScsiGroup1Cmd);
scsiGroup1Cmd(SCSI_READ_CAPACITY, sd->sd_slave, 0, 0,
(ScsiGroup1Cmd *)sc->sc_cdb.cdb);
sc->sc_buf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_buf.b_bcount = sizeof(capbuf);
sc->sc_buf.b_un.b_addr = (caddr_t)capbuf;
sc->sc_buf.av_forw = (struct buf *)0;
sc->sc_tab.b_actf = sc->sc_tab.b_actl = &sc->sc_buf;
rzstart(sd->sd_unit);
if (biowait(&sc->sc_buf) || sc->sc_buf.b_resid != 0)
goto bad;
sc->sc_blks = (capbuf[0] << 24) | (capbuf[1] << 16) |
(capbuf[2] << 8) | capbuf[3];
sc->sc_blksize = (capbuf[4] << 24) | (capbuf[5] << 16) |
(capbuf[6] << 8) | capbuf[7];
printf("rz%d at %s%d drive %d slave %d", sd->sd_unit,
sd->sd_cdriver->d_name, sd->sd_ctlr, sd->sd_drive,
sd->sd_slave);
if (inqbuf.version > 1 || i < 36)
printf(" type 0x%x, qual 0x%x, ver %d",
inqbuf.type, inqbuf.qualifier, inqbuf.version);
else {
char vid[9], pid[17], revl[5];
bcopy((caddr_t)inqbuf.vendorID, (caddr_t)vid, 8);
bcopy((caddr_t)inqbuf.productID, (caddr_t)pid, 16);
bcopy((caddr_t)inqbuf.revLevel, (caddr_t)revl, 4);
for (i = 8; --i > 0; )
if (vid[i] != ' ')
break;
vid[i+1] = 0;
for (i = 16; --i > 0; )
if (pid[i] != ' ')
break;
pid[i+1] = 0;
for (i = 4; --i > 0; )
if (revl[i] != ' ')
break;
revl[i+1] = 0;
printf(" %s %s rev %s", vid, pid, revl);
}
printf(", %d %d byte blocks\n", sc->sc_blks, sc->sc_blksize);
if (sc->sc_blksize != DEV_BSIZE) {
if (sc->sc_blksize < DEV_BSIZE) {
printf("rz%d: need %d byte blocks - drive ignored\n",
sd->sd_unit, DEV_BSIZE);
goto bad;
}
for (i = sc->sc_blksize; i > DEV_BSIZE; i >>= 1)
++sc->sc_bshift;
sc->sc_blks <<= sc->sc_bshift;
}
sc->sc_wpms = 32 * (60 * DEV_BSIZE / 2); /* XXX */
sc->sc_format_pid = 0;
sc->sc_flags = RZF_ALIVE;
/* try to read disk label or partition table information */
if (rzreadlabel(sc, sd) == 0)
goto ok;
/*
* We don't have a disk label, build a default partition
* table with 'standard' size root & swap and everything else
* in the G partition.
*/
sc->sc_info = rzdefaultpart;
/* C gets everything */
sc->sc_info.part[2].nblocks = sc->sc_blks;
sc->sc_info.part[2].endblk = sc->sc_blks;
/* G gets from end of B to end of disk */
sc->sc_info.part[6].nblocks = sc->sc_blks - sc->sc_info.part[1].endblk;
sc->sc_info.part[6].endblk = sc->sc_blks;
/*
* We also define the D, E and F paritions as an alternative to
* B and G. D is 48Mb, starts after A and is intended for swapping.
* E is 50Mb, starts after D and is intended for /usr. F starts
* after E and is what ever is left.
*/
if (sc->sc_blks >= sc->sc_info.part[4].endblk) {
sc->sc_info.part[5].nblocks =
sc->sc_blks - sc->sc_info.part[4].endblk;
sc->sc_info.part[5].endblk = sc->sc_blks;
} else {
sc->sc_info.part[5].strtblk = 0;
sc->sc_info.part[3] = sc->sc_info.part[5];
sc->sc_info.part[4] = sc->sc_info.part[5];
}
/*
* H is a single partition alternative to E and F.
*/
if (sc->sc_blks >= sc->sc_info.part[3].endblk) {
sc->sc_info.part[7].nblocks =
sc->sc_blks - sc->sc_info.part[3].endblk;
sc->sc_info.part[7].endblk = sc->sc_blks;
} else
sc->sc_info.part[7].strtblk = 0;
ok:
sc->sc_buf.b_flags = 0;
return (1);
bad:
/* doesn't exist or not a CCS device */
sc->sc_format_pid = 0;
sc->sc_buf.b_flags = 0;
return (0);
}
/*
* Try to read the disk label and fill in the partition table info.
*/
static int
rzreadlabel(sc, sd)
register struct rz_softc *sc;
register struct scsi_device *sd;
{
register struct size *sp;
Sun_DiskLabel *sunLabelPtr;
Dec_DiskLabel *decLabelPtr;
char labelBuffer[DEV_BSIZE];
int part, error;
/*
* The label of a SCSI disk normally resides in the first sector.
* Format and send a SCSI READ command to fetch the sector.
*/
sc->sc_buf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_buf.b_bcount = sizeof(labelBuffer);
sc->sc_buf.b_un.b_addr = labelBuffer;
sc->sc_buf.b_cylin = SUN_LABEL_SECTOR;
sc->sc_buf.av_forw = (struct buf *)0;
sc->sc_tab.b_actf = sc->sc_tab.b_actl = &sc->sc_buf;
rzstart(sd->sd_unit);
if (error = biowait(&sc->sc_buf))
return (error);
sunLabelPtr = (Sun_DiskLabel *)labelBuffer;
if (sunLabelPtr->magic == SUN_DISK_MAGIC) {
/*
* XXX - Should really check if label is valid.
*/
#ifdef DEBUG
if (rzdebug & RZB_PRLABEL) {
printf("rz%d: SUN label %s\n", sd->sd_unit,
sunLabelPtr->asciiLabel);
printf(" Partitions");
}
#endif
sp = sc->sc_info.part;
for (part = 0; part < DEV_NUM_DISK_PARTS; part++, sp++) {
sp->strtblk =
sunLabelPtr->map[part].cylinder *
sunLabelPtr->numHeads *
sunLabelPtr->numSectors;
sp->nblocks =
sunLabelPtr->map[part].numBlocks;
sp->endblk = sp->strtblk + sp->nblocks;
#ifdef DEBUG
if (rzdebug & RZB_PRLABEL)
printf(" (%d,%d)", sp->strtblk, sp->nblocks);
#endif
}
#ifdef DEBUG
if (rzdebug & RZB_PRLABEL)
printf("\n");
#endif
return (0);
}
/*
* The disk isn't in SUN or UNIX format so try Dec format.
* We have to read the right sector first.
*/
sc->sc_buf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_buf.b_bcount = sizeof(labelBuffer);
sc->sc_buf.b_un.b_addr = labelBuffer;
sc->sc_buf.b_cylin = DEC_LABEL_SECTOR;
sc->sc_buf.av_forw = (struct buf *)0;
sc->sc_tab.b_actf = sc->sc_tab.b_actl = &sc->sc_buf;
rzstart(sd->sd_unit);
if (error = biowait(&sc->sc_buf))
return (error);
decLabelPtr = (Dec_DiskLabel *)labelBuffer;
if (decLabelPtr->magic == DEC_LABEL_MAGIC &&
decLabelPtr->isPartitioned) {
/*
* XXX - Should really check if label is valid.
*/
#ifdef DEBUG
if (rzdebug & RZB_PRLABEL) {
printf("rz%d: DEC label\n", sd->sd_unit);
printf(" Partitions");
}
#endif
sp = sc->sc_info.part;
for (part = 0; part < DEV_NUM_DISK_PARTS; part++, sp++) {
sp->strtblk = decLabelPtr->map[part].startBlock;
sp->nblocks = decLabelPtr->map[part].numBlocks;
sp->endblk = sp->strtblk + sp->nblocks;
#ifdef DEBUG
if (rzdebug & RZB_PRLABEL)
printf(" (%d,%d)", sp->strtblk, sp->nblocks);
#endif
}
#ifdef DEBUG
if (rzdebug & RZB_PRLABEL)
printf("\n");
#endif
return (0);
}
return (EIO);
}
/*
* This routine is called for partial block transfers and non-aligned
* transfers (the latter only being possible on devices with a block size
* larger than DEV_BSIZE). The operation is performed in three steps
* using a locally allocated buffer:
* 1. transfer any initial partial block
* 2. transfer full blocks
* 3. transfer any final partial block
*/
static void
rzlblkstrat(bp, bsize)
register struct buf *bp;
register int bsize;
{
register struct buf *cbp;
caddr_t cbuf;
register int bn, resid;
register caddr_t addr;
cbp = (struct buf *)malloc(sizeof(struct buf), M_DEVBUF, M_WAITOK);
cbuf = (caddr_t)malloc(bsize, M_DEVBUF, M_WAITOK);
bzero((caddr_t)cbp, sizeof(*cbp));
cbp->b_proc = curproc;
cbp->b_dev = bp->b_dev;
bn = bp->b_blkno;
resid = bp->b_bcount;
addr = bp->b_un.b_addr;
#ifdef DEBUG
if (rzdebug & RZB_PARTIAL)
printf("rzlblkstrat: bp %x flags %x bn %x resid %x addr %x\n",
bp, bp->b_flags, bn, resid, addr);
#endif
while (resid > 0) {
register int boff = dbtob(bn) & (bsize - 1);
register int count;
if (boff || resid < bsize) {
rz_softc[rzunit(bp->b_dev)].sc_stats.rzpartials++;
count = MIN(resid, bsize - boff);
cbp->b_flags = B_BUSY | B_PHYS | B_READ;
cbp->b_blkno = bn - btodb(boff);
cbp->b_un.b_addr = cbuf;
cbp->b_bcount = bsize;
#ifdef DEBUG
if (rzdebug & RZB_PARTIAL)
printf(" readahead: bn %x cnt %x off %x addr %x\n",
cbp->b_blkno, count, boff, addr);
#endif
rzstrategy(cbp);
biowait(cbp);
if (cbp->b_flags & B_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = cbp->b_error;
break;
}
if (bp->b_flags & B_READ) {
bcopy(&cbuf[boff], addr, count);
goto done;
}
bcopy(addr, &cbuf[boff], count);
#ifdef DEBUG
if (rzdebug & RZB_PARTIAL)
printf(" writeback: bn %x cnt %x off %x addr %x\n",
cbp->b_blkno, count, boff, addr);
#endif
} else {
count = resid & ~(bsize - 1);
cbp->b_blkno = bn;
cbp->b_un.b_addr = addr;
cbp->b_bcount = count;
#ifdef DEBUG
if (rzdebug & RZB_PARTIAL)
printf(" fulltrans: bn %x cnt %x addr %x\n",
cbp->b_blkno, count, addr);
#endif
}
cbp->b_flags = B_BUSY | B_PHYS | (bp->b_flags & B_READ);
rzstrategy(cbp);
biowait(cbp);
if (cbp->b_flags & B_ERROR) {
bp->b_flags |= B_ERROR;
bp->b_error = cbp->b_error;
break;
}
done:
bn += btodb(count);
resid -= count;
addr += count;
#ifdef DEBUG
if (rzdebug & RZB_PARTIAL)
printf(" done: bn %x resid %x addr %x\n",
bn, resid, addr);
#endif
}
free(cbuf, M_DEVBUF);
free(cbp, M_DEVBUF);
}
void
rzstrategy(bp)
register struct buf *bp;
{
register int unit = rzunit(bp->b_dev);
register int part = rzpart(bp->b_dev);
register int bn, sz;
register struct rz_softc *sc = &rz_softc[unit];
register int s;
if (sc->sc_format_pid) {
if (sc->sc_format_pid != curproc->p_pid) {
bp->b_error = EPERM;
goto bad;
}
bp->b_cylin = 0;
} else {
bn = bp->b_blkno;
sz = (bp->b_bcount + (DEV_BSIZE - 1)) >> DEV_BSHIFT;
if (bn < 0 || bn + sz > sc->sc_info.part[part].nblocks) {
if (bn == sc->sc_info.part[part].nblocks) {
bp->b_resid = bp->b_bcount;
goto done;
}
bp->b_error = EINVAL;
goto bad;
}
/*
* Non-aligned or partial-block transfers handled specially.
*/
s = sc->sc_blksize - 1;
if ((dbtob(bn) & s) || (bp->b_bcount & s)) {
rzlblkstrat(bp, sc->sc_blksize);
goto done;
}
bp->b_cylin = (bn + sc->sc_info.part[part].strtblk) >>
sc->sc_bshift;
}
/* don't let disksort() see sc_errbuf */
while (sc->sc_flags & RZF_SENSEINPROGRESS)
printf("SENSE\n"); /* XXX */
s = splbio();
disksort(&sc->sc_tab, bp);
if (sc->sc_tab.b_active == 0) {
sc->sc_tab.b_active = 1;
rzstart(unit);
}
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
biodone(bp);
}
void
rzstart(unit)
int unit;
{
register struct rz_softc *sc = &rz_softc[unit];
register struct buf *bp = sc->sc_tab.b_actf;
register int n;
sc->sc_cmd.buf = bp->b_un.b_addr;
sc->sc_cmd.buflen = bp->b_bcount;
if (sc->sc_format_pid || (sc->sc_flags & RZF_SENSEINPROGRESS)) {
sc->sc_cmd.flags = !(bp->b_flags & B_READ) ?
SCSICMD_DATA_TO_DEVICE : 0;
sc->sc_cmd.cmd = sc->sc_cdb.cdb;
sc->sc_cmd.cmdlen = sc->sc_cdb.len;
} else {
if (bp->b_flags & B_READ) {
sc->sc_cmd.flags = 0;
sc->sc_rwcmd.command = SCSI_READ_EXT;
} else {
sc->sc_cmd.flags = SCSICMD_DATA_TO_DEVICE;
sc->sc_rwcmd.command = SCSI_WRITE_EXT;
}
sc->sc_cmd.cmd = (u_char *)&sc->sc_rwcmd;
sc->sc_cmd.cmdlen = sizeof(sc->sc_rwcmd);
n = bp->b_cylin;
sc->sc_rwcmd.highAddr = n >> 24;
sc->sc_rwcmd.midHighAddr = n >> 16;
sc->sc_rwcmd.midLowAddr = n >> 8;
sc->sc_rwcmd.lowAddr = n;
n = howmany(bp->b_bcount, sc->sc_blksize);
sc->sc_rwcmd.highBlockCount = n >> 8;
sc->sc_rwcmd.lowBlockCount = n;
#ifdef DEBUG
if ((bp->b_bcount & (sc->sc_blksize - 1)) != 0)
printf("rz%d: partial block xfer -- %x bytes\n",
unit, bp->b_bcount);
#endif
sc->sc_stats.rztransfers++;
if ((n = sc->sc_sd->sd_dk) >= 0) {
dk_busy |= 1 << n;
++dk_seek[n];
++dk_xfer[n];
dk_wds[n] += bp->b_bcount >> 6;
}
}
/* tell controller to start this command */
(*sc->sc_sd->sd_cdriver->d_start)(&sc->sc_cmd);
}
/*
* This is called by the controller driver when the command is done.
*/
void
rzdone(unit, error, resid, status)
register int unit;
int error; /* error number from errno.h */
int resid; /* amount not transfered */
int status; /* SCSI status byte */
{
register struct rz_softc *sc = &rz_softc[unit];
register struct buf *bp = sc->sc_tab.b_actf;
register struct scsi_device *sd = sc->sc_sd;
extern int cold;
if (bp == NULL) {
printf("rz%d: bp == NULL\n", unit);
return;
}
if (sd->sd_dk >= 0)
dk_busy &= ~(1 << sd->sd_dk);
if (sc->sc_flags & RZF_SENSEINPROGRESS) {
sc->sc_flags &= ~RZF_SENSEINPROGRESS;
sc->sc_tab.b_actf = bp = bp->av_forw; /* remove sc_errbuf */
if (error || (status & SCSI_STATUS_CHECKCOND)) {
#ifdef DEBUG
if (rzdebug & RZB_ERROR)
printf("rz%d: error reading sense data: error %d scsi status 0x%x\n",
unit, error, status);
#endif
/*
* We got an error during the REQUEST_SENSE,
* fill in no sense for data.
*/
sc->sc_sense.sense[0] = 0x70;
sc->sc_sense.sense[2] = SCSI_CLASS7_NO_SENSE;
} else if (!cold) {
printf("rz%d: ", unit);
scsiPrintSense((ScsiClass7Sense *)sc->sc_sense.sense,
sizeof(sc->sc_sense.sense) - resid);
}
} else if (error || (status & SCSI_STATUS_CHECKCOND)) {
#ifdef DEBUG
if (!cold && (rzdebug & RZB_ERROR))
printf("rz%d: error %d scsi status 0x%x\n",
unit, error, status);
#endif
/* save error info */
sc->sc_sense.status = status;
bp->b_flags |= B_ERROR;
bp->b_error = error;
bp->b_resid = resid;
if (status & SCSI_STATUS_CHECKCOND) {
/*
* Start a REQUEST_SENSE command.
* Since we are called at interrupt time, we can't
* wait for the command to finish; that's why we use
* the sc_flags field.
*/
sc->sc_flags |= RZF_SENSEINPROGRESS;
sc->sc_cdb.len = sizeof(ScsiGroup0Cmd);
scsiGroup0Cmd(SCSI_REQUEST_SENSE, sd->sd_slave, 0,
sizeof(sc->sc_sense.sense),
(ScsiGroup0Cmd *)sc->sc_cdb.cdb);
sc->sc_errbuf.b_flags = B_BUSY | B_PHYS | B_READ;
sc->sc_errbuf.b_bcount = sizeof(sc->sc_sense.sense);
sc->sc_errbuf.b_un.b_addr = (caddr_t)sc->sc_sense.sense;
sc->sc_errbuf.av_forw = bp;
sc->sc_tab.b_actf = &sc->sc_errbuf;
rzstart(unit);
return;
}
} else {
sc->sc_sense.status = status;
bp->b_resid = resid;
}
sc->sc_tab.b_actf = bp->av_forw;
biodone(bp);
if (sc->sc_tab.b_actf)
rzstart(unit);
else
sc->sc_tab.b_active = 0;
}
int
rzopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
register int unit = rzunit(dev);
register struct rz_softc *sc = &rz_softc[unit];
if (unit >= NRZ)
return (ENXIO);
if (!(sc->sc_flags & RZF_ALIVE) || suser(p->p_ucred, &p->p_acflag))
return (ENXIO);
if (sc->sc_sd->sd_dk >= 0)
dk_wpms[sc->sc_sd->sd_dk] = sc->sc_wpms;
return (0);
}
rzclose(dev, flags)
dev_t dev;
int flags;
{
return (0);
}
int
rzread(dev, uio)
dev_t dev;
struct uio *uio;
{
register struct rz_softc *sc = &rz_softc[rzunit(dev)];
if (sc->sc_format_pid && sc->sc_format_pid != curproc->p_pid)
return (EPERM);
return (physio(rzstrategy, (struct buf *)0, dev,
B_READ, minphys, uio));
}
int
rzwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
register struct rz_softc *sc = &rz_softc[rzunit(dev)];
if (sc->sc_format_pid && sc->sc_format_pid != curproc->p_pid)
return (EPERM);
return (physio(rzstrategy, (struct buf *)0, dev,
B_WRITE, minphys, uio));
}
int
rzioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct rz_softc *sc = &rz_softc[rzunit(dev)];
switch (cmd) {
default:
return (EINVAL);
case SDIOCSFORMAT:
/* take this device into or out of "format" mode */
if (suser(p->p_ucred, &p->p_acflag))
return (EPERM);
if (*(int *)data) {
if (sc->sc_format_pid)
return (EPERM);
sc->sc_format_pid = p->p_pid;
} else
sc->sc_format_pid = 0;
return (0);
case SDIOCGFORMAT:
/* find out who has the device in format mode */
*(int *)data = sc->sc_format_pid;
return (0);
case SDIOCSCSICOMMAND:
/*
* Save what user gave us as SCSI cdb to use with next
* read or write to the char device.
*/
if (sc->sc_format_pid != p->p_pid)
return (EPERM);
if (legal_cmds[((struct scsi_fmt_cdb *)data)->cdb[0]] == 0)
return (EINVAL);
bcopy(data, (caddr_t)&sc->sc_cdb, sizeof(sc->sc_cdb));
return (0);
case SDIOCSENSE:
/*
* return the SCSI sense data saved after the last
* operation that completed with "check condition" status.
*/
bcopy((caddr_t)&sc->sc_sense, data, sizeof(sc->sc_sense));
return (0);
}
/*NOTREACHED*/
}
int
rzsize(dev)
dev_t dev;
{
register int unit = rzunit(dev);
register struct rz_softc *sc = &rz_softc[unit];
if (unit >= NRZ || !(sc->sc_flags & RZF_ALIVE))
return (-1);
return (sc->sc_info.part[rzpart(dev)].nblocks);
}
/*
* Non-interrupt driven, non-dma dump routine.
*/
int
rzdump(dev)
dev_t dev;
{
#ifdef notdef
int part = rzpart(dev);
int unit = rzunit(dev);
register struct rz_softc *sc = &rz_softc[unit];
register struct scsi_device *sd = sc->sc_hd;
register daddr_t baddr;
register int maddr;
register int pages, i;
int stat;
extern int lowram;
/*
* Hmm... all vax drivers dump maxfree pages which is physmem minus
* the message buffer. Is there a reason for not dumping the
* message buffer? Savecore expects to read 'dumpsize' pages of
* dump, where dumpsys() sets dumpsize to physmem!
*/
pages = physmem;
/* is drive ok? */
if (unit >= NRZ || (sc->sc_flags & RZF_ALIVE) == 0)
return (ENXIO);
/* dump parameters in range? */
if (dumplo < 0 || dumplo >= sc->sc_info.part[part].nblocks)
return (EINVAL);
if (dumplo + ctod(pages) > sc->sc_info.part[part].nblocks)
pages = dtoc(sc->sc_info.part[part].nblocks - dumplo);
maddr = lowram;
baddr = dumplo + sc->sc_info.part[part].strtblk;
/* scsi bus idle? */
if (!scsireq(&sc->sc_dq)) {
scsireset(sd->sd_ctlr);
sc->sc_stats.rzresets++;
printf("[ drive %d reset ] ", unit);
}
for (i = 0; i < pages; i++) {
#define NPGMB (1024*1024/NBPG)
/* print out how many Mbs we have dumped */
if (i && (i % NPGMB) == 0)
printf("%d ", i / NPGMB);
#undef NPBMG
mapin(mmap, (u_int)vmmap, btop(maddr), PG_URKR|PG_CI|PG_V);
stat = scsi_tt_write(sd->sd_ctlr, sd->sd_drive, sd->sd_slave,
vmmap, NBPG, baddr, sc->sc_bshift);
if (stat) {
printf("rzdump: scsi write error 0x%x\n", stat);
return (EIO);
}
maddr += NBPG;
baddr += ctod(1);
}
return (0);
#else notdef
return (ENXIO);
#endif notdef
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.