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-rw-r--r--libusal/scsi-sgi.c479
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diff --git a/libusal/scsi-sgi.c b/libusal/scsi-sgi.c
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+/*
+ * 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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