/* @(#)scsi-sgi.c 1.36 04/01/15 Copyright 1997 J. Schilling */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-sgi.c 1.36 04/01/15 Copyright 1997 J. Schilling";
#endif
/*
* 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 scg features.
*
* 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.
*/
#include <dslib.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-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 scg_local {
short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define scglocal(p) ((struct scg_local *)((p)->local))
#endif
#define MAX_DMA_SGI (256*1024) /* Check if this is not too big */
#ifndef USE_DSLIB
LOCAL int scg_sendreq __PR((SCSI *scgp, struct scg_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.
*/
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, "DS", "Generic SCSI",
"", "bus,target,lun", "1,2,0", TRUE, FALSE);
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 ((device != NULL && *device != '\0') || (busno == -2 && tgt == -2)) {
errno = EINVAL;
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Open by 'devname' not supported on this OS");
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 (busno >= 0 && tgt >= 0 && tlun >= 0) {
js_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 (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Cannot open '%s'",
devname);
return (-1);
}
scglocal(scgp)->scgfiles[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++) {
js_snprintf(devname, sizeof (devname),
"/dev/scsi/sc%dd%dl%d", b, t, l);
f = open(devname, O_RDWR);
if (f >= 0) {
scglocal(scgp)->scgfiles[b][t][l] = (short)f;
nopen++;
}
}
}
}
#endif
}
return (nopen);
}
LOCAL int
scgo_close(scgp)
SCSI *scgp;
{
#ifndef USE_DSLIB
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;
}
}
}
#else
dsclose(dsp);
#endif
return (0);
}
LOCAL long
scgo_maxdma(scgp, amt)
SCSI *scgp;
long amt;
{
return (MAX_DMA_SGI);
}
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 = valloc((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;
{
#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 (scgp->local == NULL)
return (-1);
return ((int)scglocal(scgp)->scgfiles[busno][tgt][tlun]);
#endif
}
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;
{
/*
* 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(scgp->fd, DS_RESET, 0));
#else
return (-1);
#endif
}
#ifndef USE_DSLIB
LOCAL int
scg_sendreq(scgp, sp, dsp)
SCSI *scgp;
struct scg_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(scgp->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;
__scg_times(scgp);
if (sp->cdb.g0_cdb.cmd == SC_TEST_UNIT_READY &&
scgp->cmdstop->tv_sec < to.tv_sec ||
(scgp->cmdstop->tv_sec == to.tv_sec &&
scgp->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
LOCAL int
scgo_send(scgp)
SCSI *scgp;
{
struct scg_cmd *sp = scgp->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 (scgp->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(scgp->fd, dsp);
#else
ret = scg_sendreq(scgp, 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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