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386BSD 0.1 development
[unix-history] / usr / src / sys.386bsd / i386 / isa / as.c
/*
* Adaptech 1542 SCSI driver for 386bsd
*
* Pace Willisson pace@blitz.com March 28, 1992
*
* Placed in the public domain with NO WARRANTIES, not even the
* implied warranties for MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE.
*
*
* This is a very early version - use with care.
*
* Here is the config info:
*
* controller as0 at isa? port 0x330 bio irq 11 drq 5 vector asintr
* disk dk6 at as0 drive 0
*
* Also, don't forget to update sys/i386/conf/files.i386.
*
* So far, used with:
*
* CDC WREN 5 600 Megabyte magnetic disk
* EXABYTE EXB-8200 8mm tape drive
* SONY CDU-541 cdrom
*
* The the tape stuff still needs a lot of working concerning
* file marks, end of tape handling and rewinding, but I have
* extracted tar tapes to a file system mounted on the CDC disk.
*
* minor number bits:
*
* 7 6 5 4 3 2 1 0
* +-----+ partition number
* +-----+ scsi target number
* +--+ unused (should be 0)
*
* For tape drives, set the partition number to 0 for regular,
* 1 for no rewind.
*
* Only supports LUN 0.
*
* To use with a read-write disk, first use diskpart to create
* a disktab entry, then use disklabel. Since I don't have
* the boot programs done yet, I faked it with:
*
* # cd /usr/mdec
* # cp wdboot asboot
* # cp bootwd bootas
*
* Now you can run disklabel, newfs, etc.
*
* Please send patches and names other perpherials that work to
* pace@blitz.com. If you have trouble that you can't fix, please
* wait for the next release before contacting me.
*/
#include "as.h"
#if NAS > 0
#include "param.h"
#include "dkbad.h"
#include "systm.h"
#include "conf.h"
#include "file.h"
#include "stat.h"
#include "ioctl.h"
#include "disklabel.h"
#include "buf.h"
#include "uio.h"
#include "i386/isa/isa_device.h"
#include "i386/isa/icu.h"
#include "syslog.h"
#include "vm/vm.h"
#include "kernel.h"
#include "asreg.h"
int asstrategy ();
int asabort ();
extern int hz;
int asverbose = 0;
/* target id 7 is the controller itself */
#define NTARGETS 7
struct mailbox_entry mailboxes[NTARGETS * 2] = {0};
#define b_cylin b_resid /* fake cylinder number for disksort */
/* maximum scatter list size for Adaptech controller */
#define NSCATTER 17
/* this array must reside in contiguous physical memory */
struct asinfo {
dev_t dev;
struct buf requests;
struct mailbox_entry *mailbox;
int active;
struct ccb ccb;
unsigned int ccb_phys;
char scatter_list[NSCATTER * 6];
struct disklabel label;
struct dos_partition dospart[NDOSPART];
int have_label;
int scsi_lock;
struct buf *scsi_bp;
int scsi_cdb_len;
unsigned char scsi_cdb[MAXCDB];
int tape; /* sequential */
int disk; /* nonsequential */
int read_only; /* CDROM */
int removable; /* unsupported and tested */
char vendor[9];
char model[17];
char revision[5];
int bs; /* device block size */
int open_lock;
int open;
int units_open;
int wlabel;
int retry_count;
int start_time;
int restart_pending;
} asinfo[NTARGETS] = {0};
#define dev_part(dev) (minor (dev) & 7)
#define dev_target(dev) ((minor (dev) >> 3) & 7)
#define dev_rewind(dev) ((minor (dev) & 1) == 0)
#define makeasdev(major, target, part) \
makedev ((major), ((target) << 3) | (part))
int as_port;
int asprobe(struct isa_device *), asattach(struct isa_device *),
asintr(dev_t);
struct isa_driver asdriver = {
asprobe, asattach, "as",
};
int
asprobe (struct isa_device *dvp)
{
int val;
as_port = dvp->id_iobase;
outb (as_port + AS_CONTROL, AS_CONTROL_SRST);
DELAY (30000);
val = inb (as_port + AS_STATUS);
if (val == (AS_STATUS_INIT | AS_STATUS_IDLE))
return (1);
as_port = 0;
return (0);
}
asattach (struct isa_device *dvp)
{
int i;
unsigned int physaddr;
int val;
int s;
for (i = 0; i < NTARGETS; i++) {
asinfo[i].mailbox = &mailboxes[i];
asinfo[i].ccb_phys = vtophys (&asinfo[i].ccb);
}
isa_dmacascade(dvp->id_drq);
physaddr = vtophys (mailboxes);
s = splbio ();
if (as_put_byte (AS_CMD_MAILBOX_INIT) < 0
|| as_put_byte (NTARGETS) < 0
|| as_put_byte (physaddr >> 16) < 0
|| as_put_byte (physaddr >> 8) < 0
|| as_put_byte (physaddr) < 0) {
splx (s);
return (EIO);
}
splx (s);
DELAY (300);
val = inb (as_port + AS_STATUS);
if (val & AS_STATUS_INIT)
printf ("as: mailbox init error: 0x%x\n", val);
}
int
ascmd (as, bp, direction, count, retrycount)
struct asinfo *as;
struct buf *bp;
int direction;
int count;
int retrycount;
{
int err;
do {
if (asverbose)
printf ("ascmd ");
bp->b_bcount = count;
bp->b_error = 0;
bp->b_flags &= ~(B_READ | B_ERROR | B_DONE);
if (direction == B_READ)
bp->b_flags |= B_READ;
bp->b_dev = as->dev;
bp->b_blkno = 0;
as->scsi_bp = bp;
/* scsi_cdb, scsi_cdb_len set up by caller */
asstrategy (bp);
err = biowait (bp);
as->scsi_bp = NULL;
} while (err && --retrycount);
return (err);
}
asstring (dest, src, size)
char *dest;
char *src;
int size;
{
size--;
bcopy (src, dest, size);
while (size > 0 && dest[size - 1] == ' ')
size--;
dest[size] = 0;
}
asopen (dev, flag)
dev_t dev;
int flag;
{
struct asinfo *as;
unsigned int physaddr;
struct buf *bp = NULL;
int retry;
unsigned char *cdb;
char *p, *q;
int n;
int error;
char vendor[9];
char model[17];
int disksize;
if (as_port == 0 || dev_target (dev) >= NTARGETS)
return (ENXIO);
as = &asinfo[dev_target (dev)];
as->dev = dev;
while (as->open_lock)
if (error = tsleep ((caddr_t)as, PZERO|PCATCH, "scsiopen", 0))
return (error);
if (as->open) {
if (as->tape)
return (EBUSY);
if (as->have_label == 0 && dev_part (dev) != 3)
return (ENXIO);
as->units_open |= 1 << dev_part (dev);
return (0);
}
as->open_lock = 1;
/* it seems like we might have to block here in case someone
* opens the device just after someone else closes
*/
while (as->scsi_lock)
if (error = tsleep ((caddr_t)as, PZERO|PCATCH, "scsicmd", 0))
return (error);
as->scsi_lock = 1;
error = EIO;
as->have_label = 0;
as->tape = 0;
as->disk = 0;
as->read_only = 0;
as->removable = 0;
bcopy(as->vendor, vendor, sizeof(vendor));
bcopy(as->model, model, sizeof(model));
as->vendor[0] = 0;
as->model[0] = 0;
as->revision[0] = 0;
bp = geteblk (DEV_BSIZE);
if (asverbose) {
printf ("openbuf = 0x%x phys 0x%x\n",
bp->b_un.b_addr, vtophys (bp->b_un.b_addr));
printf ("mailboxes = 0x%x\n", mailboxes);
}
/* first, find out if a device is present, and just what it is */
as->scsi_cdb_len = 6;
cdb = as->scsi_cdb;
bzero (cdb, 6);
cdb[0] = 0x12; /* INQUIRY */
cdb[4] = 255; /* allocation length */
if (error = ascmd (as, bp, B_READ, DEV_BSIZE, 2))
/* does not respond to inquiry, obviously not CCS, give up */
goto done;
/* blather on console about it */
p = bp->b_un.b_addr;
if (asverbose) {
printf ("inquiry: ");
for (n = 0; n < 20; n++)
printf ("%x ", p[n] & 0xff);
printf ("\n");
for (n = 0; n < 40; n++) {
if (p[n] >= ' ' && p[n] < 0177)
printf ("%c", p[n]);
else
printf (".");
}
printf ("\n");
}
switch (p[0]) {
case 0: /* normal disk */
case 4: /* write once disk */
as->disk = 1;
break;
case 5: /* read only disk */
as->read_only = 1;
as->disk = 1;
break;
case 1: /* tape */
as->tape = 1;
break;
case 0x7f:
printf ("logical unit not present\n");
goto done;
default:
printf ("unknown peripheral device type: 0x%x\n", p[0]);
goto done;
}
as->removable = (p[1] & 0x80) ? 1 : 0;
n = p[4] & 0xff;
if (n >= 31) {
asstring (as->vendor, p + 8, sizeof as->vendor);
asstring (as->model, p + 16, sizeof as->model);
asstring (as->revision, p + 32, sizeof as->revision);
}
if(bcmp(as->vendor,vendor, sizeof(vendor)) != 0 ||
bcmp(as->model,model, sizeof(model)) != 0) {
printf("as%d: attached tgt %d <%s %s %s> ", 0, dev_target(dev),
as->vendor, as->model, as->revision);
if (as->read_only) printf("readonly ");
if (!as->removable) printf("winchester ");
if (as->tape) printf("tape ");
if (as->disk) printf("disk ");
printf("\n");
}
/* probe for desired block size */
/* assume default of 512, except if CDROM (2048) */
if (as->read_only)
as->bs = 2048;
else
as->bs = 512;
bzero(cdb, 6);
cdb[0] = 0x1A; /* SCSI_MDSENSE */
cdb[4] = 255;
if (as->tape && ascmd (as, bp, B_READ, 12, 2) == 0) {
int minblk, maxblk;
#ifdef notdef
/* blather about device more */
if(bcmp(as->vendor,vendor, sizeof(vendor)) != 0 ||
bcmp(as->model,model, sizeof(model)) != 0) {
p = bp->b_un.b_addr;
printf("as%d: data len %d medium %d speed/bufmode 0x%x desc len %d\n",
dev_target(dev), p[0], p[1], p[2], p[3]);
printf("as%d: density %d nblocks %d block len %d\n",
dev_target(dev), p[4],
(long)p[5]*65536+p[6]*256+p[7],
(long)p[9]*65536+p[10]*256+p[11]);
}
#endif
/* obtain possible block sizes */
bzero(cdb, 6);
cdb[0] = 0x05; /* SCSI_RDLIMITS; */
if (ascmd (as, bp, B_READ, 12, 2) == 0) {
p = bp->b_un.b_addr;
minblk = p[4]*256+p[5];
maxblk = p[1]*65536+p[2]*256+p[3];
#ifdef notdef
if(bcmp(as->vendor,vendor, sizeof(vendor)) != 0 ||
bcmp(as->model,model, sizeof(model)) != 0) {
printf("as%d: limits: min block len %ld max block len %ld\n",
dev_target(dev), minblk, maxblk);
}
#endif
if ( minblk == maxblk )
as->bs = minblk;
else if (as->tape)
as->bs = 1;
}
}
if (as->tape && dev_part(dev)) {
error = EIO;
goto done;
}
as->scsi_cdb_len = 10;
bzero(cdb, 10);
cdb[0] = 0x25; /* SCSI_READCAPACITY */
disksize = 0;
if (as->disk && ascmd (as, bp, B_READ, 12, 2) == 0) {
p = bp->b_un.b_addr;
disksize = ntohl(*(long *)p);
as->bs = ntohl(*(long *)(p+4));
}
if(asverbose)
printf("block size %d disksize %d ", as->bs, disksize);
/* for standard disk, negotiate block size */
if (as->read_only == 0 && as->disk) {
/* do mode select to set the logical block size */
as->scsi_cdb_len = 6;
cdb = as->scsi_cdb;
bzero (cdb, 6);
cdb[0] = 0x15; /* MODE SELECT */
cdb[4] = 12; /* parameter list length */
p = bp->b_un.b_addr;
bzero (p, 12);
p[3] = 8; /* block descriptor length */
n = as->bs == 1 ? 0 : as->bs;
p[9] = n >> 16;
p[10] = n >> 8;
p[11] = n;
(void) ascmd (as, bp, B_WRITE, 12, 2);
}
/* device online and ready? */
as->scsi_cdb_len = 6;
bzero(cdb, 6);
cdb[0] = 0x00; /* SCSI_UNITRDY */
if (error = ascmd (as, bp, B_READ, 12, 2)) {
printf("as%d: drive not online\n", dev_target(dev));
goto done;
}
if (as->disk && as->read_only == 0) {
/* read disk label */
bzero ((caddr_t)&as->label, sizeof as->label);
as->label.d_secsize = as->bs;
as->label.d_secpercyl = 64*32;
as->label.d_type = DTYPE_SCSI;
/* read label using "d" partition */
if ((p = readdisklabel (
makeasdev (major (dev), dev_target (dev), 3),
asstrategy, &as->label, as->dospart, 0, 0)) == NULL){
as->have_label = 1;
} else {
if (disksize) {
as->label.d_subtype = DSTYPE_GEOMETRY;
as->label.d_npartitions = 3;
/* partition 0 holds bios, partition 1 ESDI */
as->label.d_partitions[2].p_size = disksize;
as->label.d_partitions[2].p_offset = 0;
}
if (asverbose || dev_part (dev) != 3)
printf ("error reading label: %s\n", p);
if (dev_part (dev) != 3) {
error = EINVAL;
goto done;
}
}
}
/* may want to set logical block size here ? */
error = 0;
done:
if (bp) {
bp->b_flags |= B_INVAL | B_AGE;
brelse (bp);
}
if (error == 0)
as->open = 1;
as->open_lock = 0;
as->scsi_lock = 0;
wakeup (as);
return (error);
}
asclose (dev, flag)
dev_t dev;
{
struct asinfo *as;
int error = 0;
unsigned char *cdb;
struct buf *bp;
int n;
as = &asinfo[dev_target (dev)];
while (as->open_lock)
if (error = tsleep ((caddr_t)as, PZERO|PCATCH, "scsiclose", 0))
return (error);
as->open_lock = 1;
if (as->tape) {
while (as->scsi_lock)
if (error = tsleep ((caddr_t)as, PZERO|PCATCH,
"scsicmd", 0))
return (error);
as->scsi_lock = 1;
bp = geteblk (DEV_BSIZE);
if (0 && (flag & FWRITE) != 0) {
/* presume user will use tape again */
as->scsi_cdb_len = 6;
cdb = as->scsi_cdb;
bzero (cdb, 6);
cdb[0] = 0x10; /* write filemarks */
cdb[4] = 1; /* one of them */
error = ascmd (as, bp, B_READ, 0, 1);
}
if (dev_rewind (dev) || error) {
if ( error == 0 && (flag & FWRITE) != 0) {
/* presumption error correction */
as->scsi_cdb_len = 6;
cdb = as->scsi_cdb;
bzero (cdb, 6);
cdb[0] = 0x10; /* write filemarks */
cdb[4] = 1; /* one of them */
error |= ascmd (as, bp, B_READ, 0, 1);
}
as->scsi_cdb_len = 6;
cdb = as->scsi_cdb;
bzero (cdb, 6);
cdb[0] = 0x1; /* rewind */
cdb[1] = 1; /* don't wait until done */
error |= ascmd (as, bp, B_READ, 0, 1);
}
#ifdef notdef
} else {
cdb[0] = 0x11; /* backspace */
cdb[1] = 1; /* look at filemarks (instead of blocks) */
n = -1;
cdb[2] = n >> 16;
cdb[3] = n >> 8;
cdb[4] = n;
error = ascmd (as, bp, B_READ, 0, 1);
}
#endif
bp->b_flags |= B_INVAL | B_AGE;
brelse (bp);
as->scsi_lock = 0;
}
as->units_open &= ~(1 << dev_part (dev));
if (as->units_open == 0)
as->open = 0;
as->open_lock = 0;
wakeup (as);
return (error);
}
int
asioctl (dev, cmd, addr, flag)
dev_t dev;
int cmd;
caddr_t addr;
int flag;
{
struct scsicmd *cmdp;
struct asinfo *as;
int ccblen;
struct buf *bp;
int error = 0;
int direction;
struct disklabel *dl;
int old_wlabel;
as = &asinfo[dev_target (dev)];
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)addr = as->label;
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0) {
error = EBADF;
break;
}
dl = (struct disklabel *)addr;
if (error = setdisklabel(&as->label, dl, 0, as->dospart))
break;
as->have_label = 1;
break;
case DIOCWLABEL:
if ((flag & FWRITE) == 0) {
error = EBADF;
break;
}
as->wlabel = *(int *)addr;
break;
case DIOCWDINFO:
if ((flag & FWRITE) == 0) {
error = EBADF;
break;
}
dl = (struct disklabel *)addr;
if (error = setdisklabel (&as->label, dl, 0, as->dospart))
break;
as->have_label = 1;
old_wlabel = as->wlabel;
as->wlabel = 1;
error = writedisklabel(dev, asstrategy, &as->label,
as->dospart);
as->wlabel = old_wlabel;
break;
case SCSICMD:
cmdp = (struct scsicmd *)addr;
/* limited by max sizeof of geteblk */
if (cmdp->datalen >= 8192
|| cmdp->cdblen >= MAXCDB) {
error = EINVAL;
break;
}
ccblen = cmdp->ccblen;
if (ccblen > sizeof (struct ccb))
ccblen = sizeof (struct ccb);
while (as->scsi_lock)
if (error = tsleep ((caddr_t)as, PZERO|PCATCH,
"scsicmd", 0))
break;
as->scsi_lock = 1;
bp = geteblk (cmdp->datalen);
as->scsi_cdb_len = cmdp->cdblen;
if (error = copyin (cmdp->cdb, as->scsi_cdb, cmdp->cdblen))
goto done;
direction = cmdp->readflag ? B_READ : B_WRITE;
if (direction == B_WRITE)
if (error = copyin (cmdp->data,
bp->b_un.b_addr, cmdp->datalen))
goto done;
ascmd (as, bp, direction, cmdp->datalen, 1);
copyout (&as->ccb, cmdp->ccb, ccblen);
if (direction == B_READ)
copyout (bp->b_un.b_addr, cmdp->data, cmdp->datalen);
done:
bp->b_flags |= B_INVAL | B_AGE;
brelse (bp);
as->scsi_lock = 0;
wakeup (as);
break;
default:
error = ENOTTY;
break;
}
return (error);
}
int
asstrategy (bp)
struct buf *bp;
{
struct asinfo *as;
int s;
if (asverbose)
printf ("asstrategy %d %d ", bp->b_blkno, bp->b_bcount);
s = splbio ();
as = &asinfo[dev_target (bp->b_dev)];
if (as->tape) {
bp->av_forw = NULL;
if (as->requests.b_actf)
as->requests.b_actl->av_forw = bp;
else
as->requests.b_actf = bp;
as->requests.b_actl = bp;
} else {
if (bp != as->scsi_bp
&& as->have_label == 0
&& dev_part (bp->b_dev) != 3)
goto bad;
bp->b_cylin = bp->b_blkno;
disksort (&as->requests, bp);
}
if (as->active == 0)
asstart (as);
splx (s);
return;
bad:
bp->b_flags |= B_ERROR;
biodone (bp);
}
asrestart (as)
struct asinfo *as;
{
int s;
s = splbio ();
as->restart_pending = 0;
as->retry_count++;
asstart (as);
splx (s);
}
asstart (as)
struct asinfo *as;
{
struct buf *bp;
int blknum;
unsigned int physaddr;
struct ccb *ccb;
unsigned char *cdb;
int target;
char *p;
int n;
char *sp;
int nscatter;
int thistime;
int nbytes;
struct partition *part;
int blkno;
int nblocks;
int total;
int bs = as->bs;
if (as->restart_pending) {
as->restart_pending = 0;
untimeout (asrestart, as);
}
again:
if ((bp = as->requests.b_actf) == NULL)
return;
bp->b_error = 0;
if (asverbose)
printf ("asstart %x ", bp);
if (as->mailbox->cmd != 0) {
/* this can't happen, unless the card flakes */
printf ("asstart: mailbox not available\n");
bp->b_error = EIO;
goto bad;
}
if (as->retry_count == 0) {
as->start_time = time.tv_sec;
} else {
if (time.tv_sec - as->start_time > 60) {
printf ("as: command timed out\n");
bp->b_error = EIO;
goto done;
}
}
if (bp != as->scsi_bp) {
if (bp->b_bcount == 0)
goto done;
if ((bp->b_bcount % bs) != 0) {
printf("as: partial block read\n");
bp->b_error = EIO;
goto bad;
}
}
if (bp != as->scsi_bp) {
blkno = bp->b_blkno;
nblocks = bp->b_bcount / bs;
if (as->have_label && dev_part(bp->b_dev) != 3) {
part = &as->label.d_partitions[dev_part (bp->b_dev)];
if (blkno > part->p_size) {
bp->b_error = EINVAL;
goto bad;
}
if (blkno == part->p_size) {
bp->b_resid = bp->b_bcount;
goto done;
}
if (blkno + nblocks >= part->p_size)
nblocks = part->p_size - blkno;
blkno += part->p_offset;
} else
blkno = (blkno * DEV_BSIZE)/bs;
if(asverbose)
printf("trans %d ", blkno);
if (nblocks > 255)
nblocks = 255;
total = nblocks * bs;
if(asverbose)
printf("total %d nblocks %d ", total, nblocks);
/*bp->b_bcount = total; /* XXX partial tape block read - wrong */
} else {
#ifdef nomore
if (as->fixed == 0) {
total = bp->b_bcount;
} else {
total = bp->b_bcount;
blkno = bp->b_blkno;
nblocks = bp->b_bcount / as->fixed;
}
#else
total = bp->b_bcount;
#endif
}
p = bp->b_un.b_addr;
n = 0;
sp = as->scatter_list;
nscatter = 0;
while (n < total && nscatter < NSCATTER) {
thistime = page_size - ((vm_offset_t)p - trunc_page (p));
if (n + thistime > total)
thistime = total - n;
physaddr = vtophys (p);
if (asverbose)
printf ("%d bytes to %x (%x)\n",
thistime, p, physaddr);
sp[0] = thistime >> 16;
sp[1] = thistime >> 8;
sp[2] = thistime;
sp[3] = physaddr >> 16;
sp[4] = physaddr >> 8;
sp[5] = physaddr;
p += thistime;
n += thistime;
sp += 6;
nscatter++;
}
if (nscatter == NSCATTER) {
printf("out of range, cannot happen?");
bp->b_error = ENXIO;
goto bad;
}
ccb = &as->ccb;
/* this only needed to make debugging easier */
bzero ((caddr_t)ccb, sizeof *ccb);
if (nscatter)
ccb->ccb_opcode = 4; /* scatter cmd, return resid */
else
ccb->ccb_opcode = 3;
target = dev_target (bp->b_dev);
ccb->ccb_addr_and_control = target << 5;
if (bp->b_bcount != 0)
ccb->ccb_addr_and_control |= (bp->b_flags & B_READ) ? 8 : 0x10;
else
ccb->ccb_addr_and_control |= 0x18;
nbytes = nscatter * 6;
ccb->ccb_data_len_msb = nbytes >> 16;
ccb->ccb_data_len_mid = nbytes >> 8;
ccb->ccb_data_len_lsb = nbytes;
ccb->ccb_requst_sense_allocation_len = MAXSENSE;
physaddr = vtophys (as->scatter_list);
ccb->ccb_data_ptr_msb = physaddr >> 16;
ccb->ccb_data_ptr_mid = physaddr >> 8;
ccb->ccb_data_ptr_lsb = physaddr;
ccb->ccb_link_msb = 0;
ccb->ccb_link_mid = 0;
ccb->ccb_link_lsb = 0;
ccb->ccb_link_id = 0;
ccb->ccb_host_status = 0;
ccb->ccb_target_status = 0;
ccb->ccb_zero1 = 0;
ccb->ccb_zero2 = 0;
cdb = ccb->ccb_cdb;
if (bp == as->scsi_bp) {
ccb->ccb_scsi_command_len = as->scsi_cdb_len;
bcopy (as->scsi_cdb, cdb, as->scsi_cdb_len);
} else if (as->tape) {
ccb->ccb_scsi_command_len = 6;
cdb[0] = (bp->b_flags & B_READ) ? 8 : 0xa;
if (as->bs == 1) {
cdb[1] = 0; /* logical unit 0, variable block size */
cdb[2] = bp->b_bcount >> 16;
cdb[3] = bp->b_bcount >> 8;
cdb[4] = bp->b_bcount;
} else {
cdb[1] = 1; /* fixed block size */
cdb[2] = nblocks >> 16;
cdb[3] = nblocks >> 8;
cdb[4] = nblocks;
}
cdb[5] = 0; /* control byte (used in linking) */
} else {
ccb->ccb_scsi_command_len = 10;
cdb[0] = (bp->b_flags & B_READ) ? 0x28 : 0x2a;
cdb[1] = 0;
*(long *) (cdb+2) = htonl(blkno);
*(short *) (cdb+7) = htons(nblocks);
cdb[9] = 0; /* control byte (used in linking) */
}
#ifdef notdef
if (asverbose) {
printf ("ccb: ");
for (n = 0; n < 48; n++)
printf ("%02x ", ((unsigned char *)ccb)[n]);
printf ("\n");
}
#endif
physaddr = vtophys (ccb);
as->mailbox->msb = physaddr >> 16;
as->mailbox->mid = physaddr >> 8;
as->mailbox->lsb = physaddr;
as->mailbox->cmd = 1;
/* tell controller to look in its mailbox */
as_put_byte (AS_CMD_START_SCSI_COMMAND);
as->active = 1;
timeout (asabort, as, hz * 60 * 2);
return;
bad:
bp->b_flags |= B_ERROR;
done:
asdone (as, 0);
goto again;
}
asabort (as)
struct asinfo *as;
{
int s;
int physaddr;
struct buf *bp;
s = splbio ();
if (as->active) {
printf ("asabort %d\n", as - asinfo);
physaddr = vtophys (&as->ccb);
as->mailbox->msb = physaddr >> 16;
as->mailbox->mid = physaddr >> 8;
as->mailbox->lsb = physaddr;
as->mailbox->cmd = 2;
as_put_byte (AS_CMD_START_SCSI_COMMAND);
as->active = 0;
bp = as->requests.b_actf;
if (bp) {
bp->b_flags |= B_ERROR;
asdone (as, 1);
}
}
splx (s);
}
asintr (dev_t dev)
{
int didwork;
int i, j;
struct mailbox_entry *mp;
unsigned int physaddr;
int val;
outb (as_port + AS_CONTROL, AS_CONTROL_IRST);
#ifdef notdef
if (asverbose)
printf ("asintr %x ", cpl);
#endif
again:
didwork = 0;
for (i = NTARGETS; i < NTARGETS * 2; i++) {
mp = &mailboxes[i];
if ((val = mp->cmd) == 0)
continue;
didwork = 1;
physaddr = (mp->msb << 16)
| (mp->mid << 8)
| mp->lsb;
for (j = 0; j < NTARGETS; j++) {
if (asinfo[j].ccb_phys == physaddr) {
mp->cmd = 0;
asintr1 (&asinfo[j], val);
break;
}
}
if (j == NTARGETS) {
printf ("as: unknown mailbox paddr 0x%x\n", physaddr);
mp->cmd = 0;
}
}
if (didwork)
goto again;
}
asintr1 (as, val)
struct asinfo *as;
int val;
{
struct buf *bp;
struct ccb *ccb;
int n;
int bad;
char *msg;
char msgbuf[100];
unsigned char *sp;
int i,key;
if (asverbose)
printf ("asintr1 %x ", val);
if (as->active == 0) {
printf ("as: stray intr 0x%x\n", as->dev);
return;
}
as->active = 0;
untimeout (asabort, as);
bp = as->requests.b_actf;
ccb = &as->ccb;
if (bp == as->scsi_bp) {
/* no fancy error recovery in this case */
if (asverbose)
printf ("asintr1:scsicmd ");
#if 0
if (val != 1)
bp->b_flags |= B_ERROR;
goto next;
#endif
}
bad = 0;
msg = NULL;
if (val != 1 && val != 4) {
bad = 1;
sprintf (msgbuf, "funny mailbox message 0x%x\n", val);
msg = msgbuf;
goto wrapup;
}
if (ccb->ccb_host_status != 0) {
bad = 1;
sprintf (msgbuf, "controller error 0x%x",
ccb->ccb_host_status);
msg = msgbuf;
goto wrapup;
}
if (ccb->ccb_target_status == 0)
/* good transfer */
goto wrapup;
if (ccb->ccb_target_status == 8) {
/* target rejected command because it is busy
* and wants us to try again later. We'll wait 1 second
*/
as->restart_pending = 1;
timeout (asrestart, as, hz);
return;
}
if (ccb->ccb_target_status != 2) {
bad = 1;
sprintf (msgbuf, "target error 0x%x",
ccb->ccb_target_status);
msg = msgbuf;
goto wrapup;
}
/* normal path for errors */
sp = ccb_sense (ccb);
/* check for extended sense information */
if ((sp[0] & 0x7f) != 0x70) {
/* none */
bad = 1;
sprintf (msgbuf, "scsi error 0x%x", sp[0] & 0x7f);
msg = msgbuf;
goto wrapup;
}
if (as->tape && (sp[2] & 0xf) == 0) {
if (sp[2] & 0xe0) {
/* either we read a file mark, the early warning EOT,
* or the block size did not match. In any case, the
* normal residue handling will work (I think)
*/
goto wrapup;
}
}
bad = 1;
switch (key = sp[2] & 0xf) {
case 1:
msg = "soft error";
bad = 0;
break;
case 2:
msg = "not ready";
break;
case 3:
msg = "hard error";
break;
case 4:
msg = "target hardware error";
break;
case 5:
msg = "illegal request";
break;
case 6:
msg = "unit attention error";
break;
case 7:
msg = "write protect error";
break;
case 0xd:
msg = "volume overflow";
break;
default:
sprintf (msgbuf, "scsi extended error 0x%x", sp[2] & 0xf);
msg = msgbuf;
break;
}
wrapup:
if (bad && msg == NULL)
msg = "unknown error";
if (msg && key != 6) {
diskerr (bp, "as", msg,
LOG_PRINTF,
-1, /* number of successful blks */
as->have_label ? &as->label : NULL);
printf ("\n");
}
if (bad && key != 6) {
bp->b_flags |= B_ERROR;
printf ("scsi sense: ");
sp = ccb_sense (ccb);
for (i = 0; i < 30; i++)
printf ("%x ", sp[i] & 0xff);
printf ("\n");
}
bp->b_resid = (ccb->ccb_data_len_msb << 16)
| (ccb->ccb_data_len_mid << 8)
| ccb->ccb_data_len_lsb;
if (bp != as->scsi_bp && bp->b_resid != 0)
printf ("scsi resid = %d\n", bp->b_resid);
next:
asdone (as, 1);
}
asdone (as, restart)
struct asinfo *as;
int restart;
{
struct buf *bp;
bp = as->requests.b_actf;
as->requests.b_actf = bp->av_forw;
biodone (bp);
as->retry_count = 0;
if (restart && as->requests.b_actf)
asstart (as);
}
int
assize (dev)
dev_t dev;
{
struct asinfo *as;
struct disklabel *lp;
int val;
if (as_port == 0 || dev_target (dev) >= NTARGETS)
return (ENXIO);
as = &asinfo[dev_target (dev)];
if (as->open == 0
&& asopen (dev, FREAD, S_IFBLK, NULL) != 0)
return (0);
if (as->have_label == 0)
return (0);
lp = &as->label;
val = lp->d_partitions[dev_part (dev)].p_size
* lp->d_secsize / DEV_BSIZE;
(void) asclose(dev, FREAD, S_IFBLK, NULL);
return (val);
}
int
as_put_byte (val)
int val;
{
int i;
for (i = 100; i > 0; i--) {
if ((inb (as_port + AS_STATUS) & AS_STATUS_CDF) == 0)
break;
DELAY (100);
}
if (i == 0) {
printf ("as: put byte timed out\n");
return (-1);
}
outb (as_port + AS_DATA_OUT, val);
return (0);
}
int
as_get_byte (as)
{
int i;
for (i = 100; i > 0; i--) {
if ((inb (as_port + AS_STATUS) & AS_STATUS_DF) != 0)
break;
DELAY (100);
}
if (i == 0) {
printf ("as_get_byte timed out\n");
return (-1);
}
return (inb (as_port + AS_DATA_OUT) & 0xff);
}
#endif /* NAS */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.