1 files changed, 419 insertions, 0 deletions

diff --git a/libusal/scsi-next.c b/libusal/scsi-next.c
new file mode 100644
index 0000000..bfbe2b3
--- /dev/null
+++ b/libusal/scsi-next.c
@@ -0,0 +1,419 @@
+/*
+ * 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-next.c	1.32 04/01/15 Copyright 1997 J. Schilling */
+/*
+ *	Interface for the NeXT Step generic SCSI implementation.
+ *
+ *	This is a hack, that tries to emulate the functionality
+ *	of the usal driver.
+ *
+ *	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 <bsd/dev/scsireg.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-next.c-1.32";	/* The version for this transport*/
+
+#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];
+	int	usalfile;
+	int	max_scsibus;
+	int	cur_scsibus;
+	int	cur_target;
+	int	cur_lun;
+};
+#define	usallocal(p)	((struct usal_local *)((p)->local))
+
+/*#define	MAX_DMA_NEXT	(32*1024)*/
+#define	MAX_DMA_NEXT	(64*1024)	/* Check if this is not too big */
+
+
+static	BOOL	usal_setup(SCSI *usalp, int busno, int tgt, int tlun, BOOL ex);
+
+/*
+ * 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, "SGIOCREQ", "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	i;
+	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);
+
+		usallocal(usalp)->usalfile		= -1;
+		usallocal(usalp)->max_scsibus	= -1;
+		usallocal(usalp)->cur_scsibus	= -1;
+		usallocal(usalp)->cur_target	= -1;
+		usallocal(usalp)->cur_lun		= -1;
+	}
+
+	for (i = 0; i < 4; i++) {
+		snprintf(devname, sizeof (devname), "/dev/sg%d", i);
+		f = open(devname, O_RDWR);
+		if (usalp->debug > 0)
+			errmsg("open(devname: '%s') : %d\n", devname, f);
+		if (f < 0)
+			continue;
+		usallocal(usalp)->usalfile = f;
+		break;
+
+	}
+	if (f >= 0) {
+		if (usallocal(usalp)->max_scsibus < 0) {
+			for (i = 0; i < MAX_SCG; i++) {
+				if (!SCGO_HAVEBUS(usalp, i))
+					break;
+			}
+			usallocal(usalp)->max_scsibus = i;
+		}
+		if (usalp->debug > 0) {
+			fprintf((FILE *)usalp->errfile,
+				"maxbus: %d\n", usallocal(usalp)->max_scsibus);
+		}
+		if (usallocal(usalp)->max_scsibus <= 0) {
+			usallocal(usalp)->max_scsibus = 1;
+			usallocal(usalp)->cur_scsibus = 0;
+		}
+
+		ioctl(f, SGIOCENAS);
+		if (busno > 0 && tgt > 0 && tlun > 0)
+			usal_setup(usalp, busno, tgt, tlun, TRUE);
+		return (1);
+	}
+	if (usalp->errstr)
+		snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
+			"Cannot open '/dev/sg*'");
+	return (0);
+}
+
+static int
+usalo_close(SCSI *usalp)
+{
+	if (usalp->local == NULL)
+		return (-1);
+
+	if (usallocal(usalp)->usalfile >= 0)
+		close(usallocal(usalp)->usalfile);
+	usallocal(usalp)->usalfile = -1;
+	return (0);
+}
+
+static BOOL
+usal_setup(SCSI *usalp, int busno, int tgt, int tlun, BOOL ex)
+{
+	scsi_adr_t sadr;
+
+	sadr.sa_target = tgt;
+	sadr.sa_lun = tlun;
+
+	if (usalp->debug > 0) {
+		fprintf((FILE *)usalp->errfile,
+			"usal_setup curbus %d -> %d\n", usallocal(usalp)->cur_scsibus, busno);
+	}
+
+	if (usalp->debug > 0 && ((usallocal(usalp)->cur_scsibus < 0 || usallocal(usalp)->cur_scsibus != busno)))
+		fprintf((FILE *)usalp->errfile, "setting SCSI bus to: %d\n", busno);
+	if ((usallocal(usalp)->cur_scsibus < 0 || usallocal(usalp)->cur_scsibus != busno) &&
+				ioctl(usallocal(usalp)->usalfile, SGIOCCNTR, &busno) < 0) {
+
+		usallocal(usalp)->cur_scsibus = -1;	/* Driver is in undefined state */
+		if (ex)
+/*			comerr("Cannot set SCSI bus\n");*/
+			errmsg("Cannot set SCSI bus\n");
+		return (FALSE);
+	}
+	usallocal(usalp)->cur_scsibus	= busno;
+
+	if (usalp->debug > 0) {
+		fprintf((FILE *)usalp->errfile,
+			"setting target/lun to: %d/%d\n", tgt, tlun);
+	}
+	if (ioctl(usallocal(usalp)->usalfile, SGIOCSTL, &sadr) < 0) {
+		if (ex)
+			comerr("Cannot set SCSI address\n");
+		return (FALSE);
+	}
+	usallocal(usalp)->cur_scsibus	= busno;
+	usallocal(usalp)->cur_target	= tgt;
+	usallocal(usalp)->cur_lun		= tlun;
+	return (TRUE);
+}
+
+static long
+usalo_maxdma(SCSI *usalp, long amt)
+{
+	long maxdma = MAX_DMA_NEXT;
+#ifdef	SGIOCMAXDMA
+	int  m;
+
+	if (ioctl(usallocal(usalp)->usalfile, SGIOCMAXDMA, &m) >= 0) {
+		maxdma = m;
+		if (usalp->debug > 0) {
+			fprintf((FILE *)usalp->errfile,
+				"maxdma: %d\n", maxdma);
+		}
+	}
+#endif
+	return (maxdma);
+}
+#ifdef	XXX
+#define	SGIOCENAS	_IO('s', 2)			/* enable autosense */
+#define	SGIOCDAS	_IO('s', 3)			/* disable autosense */
+#define	SGIOCRST	_IO('s', 4)			/* reset SCSI bus */
+#define	SGIOCCNTR	_IOW('s', 6, int)		/* select controller */
+#define	SGIOCGAS	_IOR('s', 7, int)		/* get autosense */
+#define	SGIOCMAXDMA	_IOR('s', 8, int)		/* max DMA size */
+#define	SGIOCNUMTARGS	_IOR('s', 9, int)		/* # of targets/bus */
+#endif
+
+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)
+{
+	if (busno < 0 || busno >= MAX_SCG)
+		return (FALSE);
+
+	if (usalp->local == NULL)
+		return (FALSE);
+
+	if (usallocal(usalp)->max_scsibus > 0 && busno >= usallocal(usalp)->max_scsibus)
+		return (FALSE);
+
+	return (usal_setup(usalp, busno, 0, 0, FALSE));
+}
+
+static int
+usalo_fileno(SCSI *usalp, 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 (usallocal(usalp)->max_scsibus > 0 && busno >= usallocal(usalp)->max_scsibus)
+		return (-1);
+
+	if (usalp->local == NULL)
+		return (-1);
+
+	if ((busno != usallocal(usalp)->cur_scsibus) || (tgt != usallocal(usalp)->cur_target) || (tlun != usallocal(usalp)->cur_lun)) {
+		if (!usal_setup(usalp, busno, tgt, tlun, FALSE))
+			return (-1);
+	}
+	return (usallocal(usalp)->usalfile);
+}
+
+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)
+{
+	if (what == SCG_RESET_NOP)
+		return (0);
+	if (what != SCG_RESET_BUS) {
+		errno = EINVAL;
+		return (-1);
+	}
+	return (ioctl(usalp->fd, SGIOCRST, 0));
+}
+
+static int
+usalo_send(SCSI *usalp)
+{
+	struct usal_cmd	*sp = usalp->scmd;
+	struct scsi_req	req;
+	register long	*lp1;
+	register long	*lp2;
+	int		ret = 0;
+
+	if (usalp->fd < 0 || (sp->cdb_len > sizeof (req.sr_cdb))) {
+		sp->error = SCG_FATAL;
+		sp->ux_errno = EIO;
+		return (0);
+	}
+	fillbytes(&req, sizeof (req), '\0');
+	movebytes(sp->cdb.cmd_cdb, &req.sr_cdb, sp->cdb_len);
+	if (sp->size) {
+		req.sr_dma_dir = SR_DMA_WR;
+		if (sp->flags & SCG_RECV_DATA)
+			req.sr_dma_dir = SR_DMA_RD;
+	}
+	req.sr_addr = sp->addr;
+	req.sr_dma_max = sp->size;
+	req.sr_ioto = sp->timeout;
+	if (ioctl(usalp->fd, SGIOCREQ, (void *)&req) < 0) {
+		ret  = -1;
+		sp->ux_errno = geterrno();
+		if (sp->ux_errno != ENOTTY)
+			ret = 0;
+	} else {
+		sp->ux_errno = 0;
+	}
+	if (usalp->debug > 0) {
+		fprintf((FILE *)usalp->errfile, "dma_dir:     %X\n", req.sr_dma_dir);
+		fprintf((FILE *)usalp->errfile, "dma_addr:    %X\n", req.sr_addr);
+		fprintf((FILE *)usalp->errfile, "io_time:     %d\n", req.sr_ioto);
+		fprintf((FILE *)usalp->errfile, "io_status:   %d\n", req.sr_io_status);
+		fprintf((FILE *)usalp->errfile, "scsi_status: %X\n", req.sr_scsi_status);
+		fprintf((FILE *)usalp->errfile, "dma_xfer:    %d\n", req.sr_dma_xfr);
+	}
+	sp->u_scb.cmd_scb[0] = req.sr_scsi_status;
+	sp->sense_count = sizeof (esense_reply_t);
+	if (sp->sense_count > sp->sense_len)
+		sp->sense_count = sp->sense_len;
+	if (sp->sense_count > SCG_MAX_SENSE)
+		sp->sense_count = SCG_MAX_SENSE;
+	if (sp->sense_count < 0)
+		sp->sense_count = 0;
+	movebytes(&req.sr_esense, sp->u_sense.cmd_sense, sp->sense_count);
+	sp->resid = sp->size - req.sr_dma_xfr;
+
+	switch (req.sr_io_status) {
+
+	case SR_IOST_GOOD:	sp->error = SCG_NO_ERROR;	break;
+
+	case SR_IOST_CHKSNV:	sp->sense_count = 0;
+	case SR_IOST_CHKSV:	sp->error = SCG_RETRYABLE;
+				break;
+
+	case SR_IOST_SELTO:
+	case SR_IOST_DMAOR:
+				sp->error = SCG_FATAL;		break;
+
+	case SR_IOST_IOTO:	sp->error = SCG_TIMEOUT;	break;
+
+	case SR_IOST_PERM:
+	case SR_IOST_NOPEN:
+				sp->error = SCG_FATAL;
+				ret = (-1);
+				break;
+
+	default:		sp->error = SCG_RETRYABLE;	break;
+
+	}
+	return (ret);
+}