/* @(#)scsi-bsd-os.c 1.28 04/01/15 Copyright 1997 J. Schilling */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-bsd-os.c 1.28 04/01/15 Copyright 1997 J. Schilling";
#endif
/*
* Interface for the BSD/OS user-land raw SCSI implementation.
*
* This is a hack, that tries to emulate the functionality
* of the scg driver.
*
* Warning: you may change this source, but if you do that
* you need to change the _scg_version and _scg_auth* string below.
* You may not return "schily" for an SCG_AUTHOR request anymore.
* Choose your name instead of "schily" and make clear that the version
* string is related to a modified source.
*
* Copyright (c) 1997 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#undef sense
#define scsi_sense bsdi_scsi_sense
#define scsi_inquiry bsdi_scsi_inquiry
/*
* Must use -I/sys...
* The next two files are in /sys/dev/scsi
*/
#include <dev/scsi/scsi.h>
#include <dev/scsi/scsi_ioctl.h>
/*
* Warning: you may change this source, but if you do that
* you need to change the _scg_version and _scg_auth* string below.
* You may not return "schily" for an SCG_AUTHOR request anymore.
* Choose your name instead of "schily" and make clear that the version
* string is related to a modified source.
*/
LOCAL char _scg_trans_version[] = "scsi-bsd-os.c-1.28"; /* The version for this transport*/
#define MAX_SCG 16 /* Max # of SCSI controllers */
#define MAX_TGT 16
#define MAX_LUN 8
struct scg_local {
short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define scglocal(p) ((struct scg_local *)((p)->local))
#include <machine/param.h>
#define MAX_DMA_BSDI MAXPHYS /* More makes problems */
LOCAL BOOL scg_setup __PR((SCSI *scgp, int f, int busno, int tgt, int tlun));
/*
* Return version information for the low level SCSI transport code.
* This has been introduced to make it easier to trace down problems
* in applications.
*/
LOCAL char *
scgo_version(scgp, what)
SCSI *scgp;
int what;
{
if (scgp != (SCSI *)0) {
switch (what) {
case SCG_VERSION:
return (_scg_trans_version);
/*
* If you changed this source, you are not allowed to
* return "schily" for the SCG_AUTHOR request.
*/
case SCG_AUTHOR:
return (_scg_auth_schily);
case SCG_SCCS_ID:
return (__sccsid);
}
}
return ((char *)0);
}
LOCAL int
scgo_help(scgp, f)
SCSI *scgp;
FILE *f;
{
__scg_help(f, "SCSIRAWCDB", "Generic SCSI for devices known by BSDi",
"", "devname:@,lun", "/dev/rsr0a:@,0", FALSE, TRUE);
return (0);
}
LOCAL int
scgo_open(scgp, device)
SCSI *scgp;
char *device;
{
int busno = scg_scsibus(scgp);
int tgt = scg_target(scgp);
int tlun = scg_lun(scgp);
register int f;
register int b;
register int t;
register int l;
register int nopen = 0;
char devname[64];
if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
errno = EINVAL;
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Illegal value for busno, target or lun '%d,%d,%d'",
busno, tgt, tlun);
return (-1);
}
if (scgp->local == NULL) {
scgp->local = malloc(sizeof (struct scg_local));
if (scgp->local == NULL)
return (0);
for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++)
scglocal(scgp)->scgfiles[b][t][l] = (short)-1;
}
}
}
if ((device != NULL && *device != '\0') || (busno == -2 && tgt == -2))
goto openbydev;
if (busno >= 0 && tgt >= 0 && tlun >= 0) {
js_snprintf(devname, sizeof (devname),
"/dev/su%d-%d-%d", busno, tgt, tlun);
f = open(devname, O_RDWR|O_NONBLOCK);
if (f < 0) {
goto openbydev;
}
scglocal(scgp)->scgfiles[busno][tgt][tlun] = f;
return (1);
} else for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++) {
js_snprintf(devname, sizeof (devname),
"/dev/su%d-%d-%d", b, t, l);
f = open(devname, O_RDWR|O_NONBLOCK);
/* error("open (%s) = %d\n", devname, f);*/
if (f < 0) {
if (errno != ENOENT &&
errno != ENXIO &&
errno != ENODEV) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Cannot open '%s'",
devname);
return (0);
}
} else {
if (scg_setup(scgp, f, b, t, l))
nopen++;
}
}
}
}
/*
* Could not open /dev/su-* or got dev=devname:b,l,l / dev=devname:@,l
* We do the apropriate tests and try our best.
*/
openbydev:
if (nopen == 0) {
if (device == NULL || device[0] == '\0')
return (0);
f = open(device, O_RDWR|O_NONBLOCK);
if (f < 0) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Cannot open '%s'",
device);
return (0);
}
if (tlun == -2) { /* If 'lun' is not known, we reject */
close(f);
errno = EINVAL;
return (0);
}
busno = 0; /* use fake number, we cannot get it */
tgt = 0; /* use fake number, we cannot get it */
scg_settarget(scgp, busno, tgt, tlun);
/* 'lun' has been specified on command line */
if (scg_setup(scgp, f, busno, tgt, tlun))
nopen++;
}
return (nopen);
}
LOCAL int
scgo_close(scgp)
SCSI *scgp;
{
register int f;
register int b;
register int t;
register int l;
if (scgp->local == NULL)
return (-1);
for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++) {
f = scglocal(scgp)->scgfiles[b][t][l];
if (f >= 0)
close(f);
scglocal(scgp)->scgfiles[b][t][l] = (short)-1;
}
}
}
return (0);
}
LOCAL BOOL
scg_setup(scgp, f, busno, tgt, tlun)
SCSI *scgp;
int f;
int busno;
int tgt;
int tlun;
{
int Bus;
int Target;
int Lun;
BOOL onetarget = FALSE;
if (scg_scsibus(scgp) >= 0 && scg_target(scgp) >= 0 && scg_lun(scgp) >= 0)
onetarget = TRUE;
/*
* Unfortunately there is no way to get the right values from kernel.
*/
Bus = busno;
Target = tgt;
Lun = tlun;
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"Bus: %d Target: %d Lun: %d\n", Bus, Target, Lun);
}
if (Bus >= MAX_SCG || Target >= MAX_TGT || Lun >= MAX_LUN) {
close(f);
return (FALSE);
}
if (scglocal(scgp)->scgfiles[Bus][Target][Lun] == (short)-1)
scglocal(scgp)->scgfiles[Bus][Target][Lun] = (short)f;
if (onetarget) {
if (Bus == busno && Target == tgt && Lun == tlun) {
return (TRUE);
} else {
scglocal(scgp)->scgfiles[Bus][Target][Lun] = (short)-1;
close(f);
}
}
return (FALSE);
}
LOCAL long
scgo_maxdma(scgp, amt)
SCSI *scgp;
long amt;
{
long maxdma = MAX_DMA_BSDI;
return (maxdma);
}
LOCAL void *
scgo_getbuf(scgp, amt)
SCSI *scgp;
long amt;
{
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"scgo_getbuf: %ld bytes\n", amt);
}
scgp->bufbase = malloc((size_t)(amt));
return (scgp->bufbase);
}
LOCAL void
scgo_freebuf(scgp)
SCSI *scgp;
{
if (scgp->bufbase)
free(scgp->bufbase);
scgp->bufbase = NULL;
}
LOCAL BOOL
scgo_havebus(scgp, busno)
SCSI *scgp;
int busno;
{
register int t;
register int l;
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
if (scgp->local == NULL)
return (FALSE);
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++)
if (scglocal(scgp)->scgfiles[busno][t][l] >= 0)
return (TRUE);
}
return (FALSE);
}
LOCAL int
scgo_fileno(scgp, busno, tgt, tlun)
SCSI *scgp;
int busno;
int tgt;
int tlun;
{
if (busno < 0 || busno >= MAX_SCG ||
tgt < 0 || tgt >= MAX_TGT ||
tlun < 0 || tlun >= MAX_LUN)
return (-1);
if (scgp->local == NULL)
return (-1);
return ((int)scglocal(scgp)->scgfiles[busno][tgt][tlun]);
}
LOCAL int
scgo_initiator_id(scgp)
SCSI *scgp;
{
return (-1);
}
LOCAL int
scgo_isatapi(scgp)
SCSI *scgp;
{
return (FALSE);
}
LOCAL int
scgo_reset(scgp, what)
SCSI *scgp;
int what;
{
/*
* Cannot reset on BSD/OS
*/
errno = EINVAL;
return (-1);
}
LOCAL int
scgo_send(scgp)
SCSI *scgp;
{
struct scg_cmd *sp = scgp->scmd;
scsi_user_cdb_t suc;
int ret = 0;
/* js_fprintf((FILE *)scgp->errfile, "f: %d\n", f);*/
if (scgp->fd < 0) {
sp->error = SCG_FATAL;
return (0);
}
/* Zero the structure... */
fillbytes(&suc, sizeof (suc), '\0');
/* Read or write? */
if (sp->flags & SCG_RECV_DATA) {
suc.suc_flags |= SUC_READ;
} else if (sp->size > 0) {
suc.suc_flags |= SUC_WRITE;
}
suc.suc_timeout = sp->timeout;
suc.suc_cdblen = sp->cdb_len;
movebytes(sp->cdb.cmd_cdb, suc.suc_cdb, suc.suc_cdblen);
suc.suc_datalen = sp->size;
suc.suc_data = sp->addr;
if (ioctl(scgp->fd, SCSIRAWCDB, &suc) < 0) {
ret = -1;
sp->ux_errno = geterrno();
if (sp->ux_errno != ENOTTY)
ret = 0;
} else {
sp->ux_errno = 0;
if (suc.suc_sus.sus_status != STS_GOOD)
sp->ux_errno = EIO;
}
fillbytes(&sp->scb, sizeof (sp->scb), '\0');
fillbytes(&sp->u_sense.cmd_sense, sizeof (sp->u_sense.cmd_sense), '\0');
#if 0
/*
* Unfortunalety, BSD/OS has no idea of DMA residual count.
*/
sp->resid = req.datalen - req.datalen_used;
sp->sense_count = req.senselen_used;
#else
sp->resid = 0;
sp->sense_count = sizeof (suc.suc_sus.sus_sense);
#endif
if (sp->sense_count > SCG_MAX_SENSE)
sp->sense_count = SCG_MAX_SENSE;
movebytes(suc.suc_sus.sus_sense, sp->u_sense.cmd_sense, sp->sense_count);
sp->u_scb.cmd_scb[0] = suc.suc_sus.sus_status;
switch (suc.suc_sus.sus_status) {
case STS_GOOD:
sp->error = SCG_NO_ERROR; break;
case STS_CMD_TERMINATED:sp->error = SCG_TIMEOUT; break;
case STS_BUSY: sp->error = SCG_RETRYABLE; break;
case STS_CHECKCOND: sp->error = SCG_RETRYABLE; break;
case STS_QUEUE_FULL: sp->error = SCG_RETRYABLE; break;
default: sp->error = SCG_FATAL; break;
}
return (ret);
}
#define sense u_sense.Sense
#undef scsi_sense
#undef scsi_inquiry
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