/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)scsi-sgi.c 1.36 04/01/15 Copyright 1997 J. Schilling */
/*
* Interface for the SGI generic SCSI implementation.
*
* First Hacky implementation
* (needed libds, did not support bus scanning and had no error checking)
* from "Frank van Beek" <frank@neogeo.nl>
*
* Actual implementation supports all usal features.
*
* Warning: you may change this source, but if you do that
* you need to change the _usal_version and _usal_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 version 2
* as published by the Free Software Foundation.
*
* 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.
*/
#include <dslib.h>
/*
* Warning: you may change this source, but if you do that
* you need to change the _usal_version and _usal_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.
*/
static char _usal_trans_version[] = "scsi-sgi.c-1.36"; /* The version for this transport*/
#ifdef USE_DSLIB
struct dsreq * dsp = 0;
#define MAX_SCG 1 /* Max # of SCSI controllers */
#else
#define MAX_SCG 16 /* Max # of SCSI controllers */
#define MAX_TGT 16
#define MAX_LUN 8
struct usal_local {
short usalfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define usallocal(p) ((struct usal_local *)((p)->local))
#endif
#define MAX_DMA_SGI (256*1024) /* Check if this is not too big */
#ifndef USE_DSLIB
static int usal_sendreq(SCSI *usalp, struct usal_cmd *sp, struct dsreq *dsp);
#endif
/*
* Return version information for the low level SCSI transport code.
* This has been introduced to make it easier to trace down problems
* in applications.
*/
static char *
usalo_version(SCSI *usalp, int what)
{
if (usalp != (SCSI *)0) {
switch (what) {
case SCG_VERSION:
return (_usal_trans_version);
/*
* If you changed this source, you are not allowed to
* return "schily" for the SCG_AUTHOR request.
*/
case SCG_AUTHOR:
return (_usal_auth_cdrkit);
case SCG_SCCS_ID:
return (__sccsid);
}
}
return ((char *)0);
}
static int
usalo_help(SCSI *usalp, FILE *f)
{
__usal_help(f, "DS", "Generic SCSI",
"", "bus,target,lun", "1,2,0", TRUE, FALSE);
return (0);
}
static int
usalo_open(SCSI *usalp, char *device)
{
int busno = usal_scsibus(usalp);
int tgt = usal_target(usalp);
int tlun = usal_lun(usalp);
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 (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Illegal value for busno, target or lun '%d,%d,%d'",
busno, tgt, tlun);
return (-1);
}
if ((device != NULL && *device != '\0') || (busno == -2 && tgt == -2)) {
errno = EINVAL;
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Open by 'devname' not supported on this OS");
return (-1);
}
if (usalp->local == NULL) {
usalp->local = malloc(sizeof (struct usal_local));
if (usalp->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++)
usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
}
}
}
if (busno >= 0 && tgt >= 0 && tlun >= 0) {
snprintf(devname, sizeof (devname),
"/dev/scsi/sc%dd%dl%d", busno, tgt, tlun);
#ifdef USE_DSLIB
dsp = dsopen(devname, O_RDWR);
if (dsp == 0)
return (-1);
#else
f = open(devname, O_RDWR);
if (f < 0) {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Cannot open '%s'",
devname);
return (-1);
}
usallocal(usalp)->usalfiles[busno][tgt][tlun] = f;
#endif
return (1);
} else {
#ifdef USE_DSLIB
return (-1);
#else
for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
/* for (l = 0; l < MAX_LUN; l++) {*/
for (l = 0; l < 1; l++) {
snprintf(devname, sizeof (devname),
"/dev/scsi/sc%dd%dl%d", b, t, l);
f = open(devname, O_RDWR);
if (f >= 0) {
usallocal(usalp)->usalfiles[b][t][l] = (short)f;
nopen++;
}
}
}
}
#endif
}
return (nopen);
}
static int
usalo_close(SCSI *usalp)
{
#ifndef USE_DSLIB
register int f;
register int b;
register int t;
register int l;
if (usalp->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 = usallocal(usalp)->usalfiles[b][t][l];
if (f >= 0)
close(f);
usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
}
}
}
#else
dsclose(dsp);
#endif
return (0);
}
static long
usalo_maxdma(SCSI *usalp, long amt)
{
return (MAX_DMA_SGI);
}
static void *
usalo_getbuf(SCSI *usalp, long amt)
{
if (usalp->debug > 0) {
fprintf((FILE *)usalp->errfile,
"usalo_getbuf: %ld bytes\n", amt);
}
usalp->bufbase = valloc((size_t)(amt));
return (usalp->bufbase);
}
static void
usalo_freebuf(SCSI *usalp)
{
if (usalp->bufbase)
free(usalp->bufbase);
usalp->bufbase = NULL;
}
static BOOL
usalo_havebus(SCSI *usalp, int busno)
{
register int t;
register int l;
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
if (usalp->local == NULL)
return (FALSE);
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++)
if (usallocal(usalp)->usalfiles[busno][t][l] >= 0)
return (TRUE);
}
return (FALSE);
}
static int
usalo_fileno(SCSI *usalp, int busno, int tgt, int tlun)
{
#ifdef USE_DSLIB
if (dsp == NULL)
return (-1);
return (getfd(dsp));
#else
if (busno < 0 || busno >= MAX_SCG ||
tgt < 0 || tgt >= MAX_TGT ||
tlun < 0 || tlun >= MAX_LUN)
return (-1);
if (usalp->local == NULL)
return (-1);
return ((int)usallocal(usalp)->usalfiles[busno][tgt][tlun]);
#endif
}
static int
usalo_initiator_id(SCSI *usalp)
{
return (-1);
}
static int
usalo_isatapi(SCSI *usalp)
{
return (FALSE);
}
static int
usalo_reset(SCSI *usalp, int what)
{
/*
* Do we have a SCSI reset on SGI?
*/
#ifdef DS_RESET
if (what == SCG_RESET_NOP)
return (0);
if (what != SCG_RESET_BUS) {
errno = EINVAL;
return (-1);
}
/*
* XXX Does this reset TGT or BUS ???
*/
return (ioctl(usalp->fd, DS_RESET, 0));
#else
return (-1);
#endif
}
#ifndef USE_DSLIB
static int
usal_sendreq(SCSI *usalp, struct usal_cmd *sp, struct dsreq *dsp)
{
int ret;
int retries = 4;
Uchar status;
/* if ((sp->flags & SCG_CMD_RETRY) == 0)*/
/* retries = 0;*/
while (--retries > 0) {
ret = ioctl(usalp->fd, DS_ENTER, dsp);
if (ret < 0) {
RET(dsp) = DSRT_DEVSCSI;
return (-1);
}
/*
* SGI implementattion botch!!!
* If a target does not select the bus,
* the return code is DSRT_TIMEOUT
*/
if (RET(dsp) == DSRT_TIMEOUT) {
struct timeval to;
to.tv_sec = TIME(dsp)/1000;
to.tv_usec = TIME(dsp)%1000;
__usal_times(usalp);
if (sp->cdb.g0_cdb.cmd == SC_TEST_UNIT_READY &&
usalp->cmdstop->tv_sec < to.tv_sec ||
(usalp->cmdstop->tv_sec == to.tv_sec &&
usalp->cmdstop->tv_usec < to.tv_usec)) {
RET(dsp) = DSRT_NOSEL;
return (-1);
}
}
if (RET(dsp) == DSRT_NOSEL)
continue; /* retry noselect 3X */
status = STATUS(dsp);
switch (status) {
case 0x08: /* BUSY */
case 0x18: /* RESERV CONFLICT */
if (retries > 0)
sleep(2);
continue;
case 0x00: /* GOOD */
case 0x02: /* CHECK CONDITION */
case 0x10: /* INTERM/GOOD */
default:
return (status);
}
}
return (-1); /* failed retry limit */
}
#endif
static int
usalo_send(SCSI *usalp)
{
struct usal_cmd *sp = usalp->scmd;
int ret;
int i;
int amt = sp->cdb_len;
int flags;
#ifndef USE_DSLIB
struct dsreq ds;
struct dsreq *dsp = &ds;
dsp->ds_iovbuf = 0;
dsp->ds_iovlen = 0;
#endif
if (usalp->fd < 0) {
sp->error = SCG_FATAL;
return (0);
}
flags = DSRQ_SENSE;
if (sp->flags & SCG_RECV_DATA)
flags |= DSRQ_READ;
else if (sp->size > 0)
flags |= DSRQ_WRITE;
dsp->ds_flags = flags;
dsp->ds_link = 0;
dsp->ds_synch = 0;
dsp->ds_ret = 0;
DATABUF(dsp) = sp->addr;
DATALEN(dsp) = sp->size;
CMDBUF(dsp) = (void *) &sp->cdb;
CMDLEN(dsp) = sp->cdb_len;
SENSEBUF(dsp) = (caddr_t)sp->u_sense.cmd_sense;
SENSELEN(dsp) = sizeof (sp->u_sense.cmd_sense);
TIME(dsp) = (sp->timeout * 1000) + 100;
errno = 0;
sp->ux_errno = 0;
sp->sense_count = 0;
#ifdef USE_DSLIB
ret = doscsireq(usalp->fd, dsp);
#else
ret = usal_sendreq(usalp, sp, dsp);
#endif
if (RET(dsp) != DSRT_DEVSCSI)
ret = 0;
if (RET(dsp)) {
if (RET(dsp) == DSRT_SHORT) {
sp->resid = DATALEN(dsp)- DATASENT(dsp);
} else if (errno) {
sp->ux_errno = errno;
} else {
sp->ux_errno = EIO;
}
sp->u_scb.cmd_scb[0] = STATUS(dsp);
sp->sense_count = SENSESENT(dsp);
if (sp->sense_count > SCG_MAX_SENSE)
sp->sense_count = SCG_MAX_SENSE;
}
switch (RET(dsp)) {
default:
sp->error = SCG_RETRYABLE; break;
case 0: /* OK */
case DSRT_SHORT: /* not implemented */
sp->error = SCG_NO_ERROR; break;
case DSRT_UNIMPL: /* not implemented */
case DSRT_REVCODE: /* software obsolete must recompile */
case DSRT_NOSEL:
sp->u_scb.cmd_scb[0] = 0;
sp->error = SCG_FATAL; break;
case DSRT_TIMEOUT:
sp->u_scb.cmd_scb[0] = 0;
sp->error = SCG_TIMEOUT; break;
}
return (ret);
}
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