/* @(#)scsi-osf.c	1.12 99/10/15 Copyright 1998 J. Schilling */#ifndef lintstatic	char __sccsid[] =	"@(#)scsi-osf.c	1.12 99/10/15 Copyright 1998 J. Schilling";#endif/* *	Interface for Digital UNIX (OSF/1 generic SCSI implementation (/dev/cam). * *	Created out of the hacks from: *		Stefan Traby <stefan@sime.com> and *		Bruno Achauer <bruno@tk.uni-linz.ac.at> * *	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) 1998 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, 675 Mass Ave, Cambridge, MA 02139, USA. */#include <sys/types.h>#include <io/common/iotypes.h>#include <io/cam/cam.h>#include <io/cam/uagt.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-osf.c-1.12";	/* The version for this transport*/#define	MAX_SCG		16	/* Max # of SCSI controllers */#define	MAX_TGT		16#define	MAX_LUN		8struct scg_local {	int	scgfile;	/* Used for ioctl()	*/	short	scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];};#define scglocal(p)	((struct scg_local *)((p)->local)) LOCAL	BOOL	scsi_checktgt	__PR((SCSI *scgp, int f, int busno, int tgt, int tlun));/* * I don't have any documentation about CAM */#define	MAX_DMA_OSF_CAM	(64*1024)#ifndef	AUTO_SENSE_LEN#	define	AUTO_SENSE_LEN	32	/* SCG_MAX_SENSE */#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. */EXPORT char *scg__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);}EXPORT intscsi_open(scgp, device, busno, tgt, tlun)	SCSI	*scgp;	char	*device;	int	busno;	int	tgt;	int	tlun;{	register int	b;	register int	t;	register int	l;	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);		scglocal(scgp)->scgfile = -1;		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] = 0;			}		}	}	if (scglocal(scgp)->scgfile != -1)	/* multiple opens ??? */		return (1);			/* not yet ready .... */	if ((scglocal(scgp)->scgfile = open("/dev/cam", O_RDWR, 0)) < 0) {		if (scgp->errstr)			js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,				"Cannot open '/dev/cam'");		return (-1);	}	if (busno >= 0 && tgt >= 0 && tlun >= 0) {		/* scsi_checktgt() ??? */		for (l=0; l < MAX_LUN ; l++)			scglocal(scgp)->scgfiles[b][t][l] = 1;		return (1);	}	/*	 * There seems to be no clean way to check whether	 * a SCSI bus is present in the current system.	 * scsi_checktgt() is used as a workaround for this problem.	 */	for (b=0; b < MAX_SCG; b++) {		for (t=0; t < MAX_TGT; t++) {			if (scsi_checktgt(scgp, scglocal(scgp)->scgfile, b, t, 0)) {				for (l=0; l < MAX_LUN ; l++)					scglocal(scgp)->scgfiles[b][t][l] = 1;				/*				 * Found a target on this bus.				 * Comment the 'break' for a complete scan.				 */				break;			}		}	}	return (1);}EXPORT intscsi_close(scgp)	SCSI	*scgp;{	if (scgp->local == NULL)		return (-1);	if (scglocal(scgp)->scgfile >= 0)		close(scglocal(scgp)->scgfile);	scglocal(scgp)->scgfile = -1;	return (0);}/* * We send a test unit ready command to the target to check whether the * OS is considering this target to be valid. */LOCAL BOOLscsi_checktgt(scgp, f, busno, tgt, tlun)	SCSI	*scgp;	int	f;	int	busno;	int	tgt;	int	tlun;{	struct scg_cmd	sc;	int	obus = scgp->scsibus;	int	otgt = scgp->target;	int	olun = scgp->lun;	scgp->scsibus = busno;	scgp->target  = tgt;	scgp->lun     = tlun;		fillbytes((caddr_t)&sc, sizeof(sc), '\0');	sc.addr = (caddr_t)0;	sc.size = 0;	sc.flags = SCG_DISRE_ENA | SCG_SILENT;	sc.cdb_len = SC_G0_CDBLEN;	sc.sense_len = CCS_SENSE_LEN;	sc.target = scgp->target;	sc.cdb.g0_cdb.cmd = SC_TEST_UNIT_READY;	sc.cdb.g0_cdb.lun = scgp->lun;	scsi_send(scgp, f, &sc);	scgp->scsibus = obus;	scgp->target  = otgt;	scgp->lun     = olun;	if (sc.error != SCG_FATAL)		return (TRUE);	return (sc.ux_errno != EINVAL);}LOCAL longscsi_maxdma(scgp)	SCSI	*scgp;{	long maxdma = MAX_DMA_OSF_CAM;	return (maxdma);}EXPORT void *scsi_getbuf(scgp, amt)	SCSI	*scgp;	long	amt;{	if (amt <= 0 || amt > scsi_maxdma(scgp))		return ((void *)0);	if (scgp->debug)		printf("scsi_getbuf: %ld bytes\n", amt);	scgp->bufbase = valloc((size_t)(amt));	return (scgp->bufbase);}EXPORT voidscsi_freebuf(scgp)	SCSI	*scgp;{	if (scgp->bufbase)		free(scgp->bufbase);	scgp->bufbase = NULL;}EXPORTBOOL scsi_havebus(scgp, busno)	SCSI	*scgp;	int	busno;{	register int	t;	if (busno < 0 || busno >= MAX_SCG)		return (FALSE);	if (scgp->local == NULL)		return (FALSE);	for (t=0; t < MAX_TGT; t++) {		if (scglocal(scgp)->scgfiles[busno][t][0] != 0)			return (TRUE);	}	return (FALSE);}EXPORTint scsi_fileno(scgp, busno, tgt, tlun)	SCSI	*scgp;	int	busno;	int	tgt;	int	tlun;{	if (scgp->local == NULL)		return (-1);	return (busno < 0 || busno >= MAX_SCG) ? -1 : scglocal(scgp)->scgfile;}EXPORT intscsi_initiator_id(scgp)	SCSI	*scgp;{	return (-1);}EXPORTint scsi_isatapi(scgp)	SCSI	*scgp;{	return (FALSE);}EXPORTint scsireset(scgp)	SCSI	*scgp;{#ifdef	XXX	int	f = scsi_fileno(scgp, scgp->scsibus, scgp->target, scgp->lun);	return (ioctl(f, SCGIORESET, 0));#else	return (-1);#endif}LOCAL intscsi_send(scgp, f, sp)	SCSI		*scgp;	int		f;	struct scg_cmd	*sp;{	CCB_SCSIIO ccb;	UAGT_CAM_CCB ua;	unsigned char  *cdb;	CCB_RELSIM relsim;	UAGT_CAM_CCB relua;	int             i;	if (f < 0) {		sp->error = SCG_FATAL;		return (0);	}	fillbytes(&ua, sizeof(UAGT_CAM_CCB), 0);	fillbytes(&ccb, sizeof(CCB_SCSIIO), 0);	ua.uagt_ccb = (CCB_HEADER *) &ccb;	ua.uagt_ccblen = sizeof(CCB_SCSIIO);	ccb.cam_ch.my_addr = (CCB_HEADER *) &ccb;	ccb.cam_ch.cam_ccb_len = sizeof(CCB_SCSIIO);	ua.uagt_snsbuf = ccb.cam_sense_ptr = sp->u_sense.cmd_sense;	ua.uagt_snslen = ccb.cam_sense_len = AUTO_SENSE_LEN;	cdb = (unsigned char *) ccb.cam_cdb_io.cam_cdb_bytes;	ccb.cam_timeout = sp->timeout;	ccb.cam_data_ptr = ua.uagt_buffer = (u_char *) sp->addr;	ccb.cam_dxfer_len = ua.uagt_buflen = sp->size;	ccb.cam_ch.cam_func_code = XPT_SCSI_IO;	ccb.cam_ch.cam_flags = 0;	/* CAM_DIS_CALLBACK; */	if (sp->size == 0) {		ccb.cam_data_ptr = ua.uagt_buffer = (u_char *) NULL;		ccb.cam_ch.cam_flags |= CAM_DIR_NONE;	} else {		if (sp->flags & SCG_RECV_DATA) {			ccb.cam_ch.cam_flags |= CAM_DIR_IN;		} else {			ccb.cam_ch.cam_flags |= CAM_DIR_OUT;		}	}	ccb.cam_cdb_len = sp->cdb_len;	for (i = 0; i < sp->cdb_len; i++)		cdb[i] = sp->cdb.cmd_cdb[i];	ccb.cam_ch.cam_path_id	  = scgp->scsibus;	ccb.cam_ch.cam_target_id  = scgp->target;	ccb.cam_ch.cam_target_lun = scgp->lun;	sp->sense_count = 0;	sp->ux_errno = 0;	sp->error = SCG_NO_ERROR;	if (ioctl(f, UAGT_CAM_IO, (caddr_t) &ua) < 0) {		sp->ux_errno = geterrno();		sp->error = SCG_FATAL;		if (scgp->debug) {			errmsg("ioctl(f, UAGT_CAM_IO, dev=%d,%d,%d) failed.\n",					scgp->scsibus, scgp->target, scgp->lun);		}		return (0);	}	if (scgp->debug) {		errmsgno(EX_BAD, "cam_status = 0x%.2X dev=%d,%d,%d\n",					ccb.cam_ch.cam_status,					scgp->scsibus, scgp->target, scgp->lun);		fflush(stderr);	}	switch (ccb.cam_ch.cam_status & CAM_STATUS_MASK) {	case CAM_REQ_CMP:	break;	case CAM_SEL_TIMEOUT:	sp->error = SCG_FATAL;				sp->ux_errno = EIO;				break;	case CAM_CMD_TIMEOUT:	sp->error = SCG_TIMEOUT;				sp->ux_errno = EIO;				break;	default:		sp->error = SCG_RETRYABLE;				sp->ux_errno = EIO;				break;	}	sp->u_scb.cmd_scb[0] = ccb.cam_scsi_status;	if (ccb.cam_ch.cam_status & CAM_AUTOSNS_VALID) {		sp->sense_count = MIN(ccb.cam_sense_len - ccb.cam_sense_resid,			SCG_MAX_SENSE);		sp->sense_count = MIN(sp->sense_count, sp->sense_len);		if (sp->sense_len < 0)			sp->sense_count = 0;	}	sp->resid = ccb.cam_resid;	/*	 * this is perfectly wrong.	 * But without this, we hang...	 */	if (ccb.cam_ch.cam_status & CAM_SIM_QFRZN) {		fillbytes(&relsim, sizeof(CCB_RELSIM), 0);		relsim.cam_ch.cam_ccb_len = sizeof(CCB_SCSIIO);		relsim.cam_ch.cam_func_code = XPT_REL_SIMQ;		relsim.cam_ch.cam_flags = CAM_DIR_IN | CAM_DIS_CALLBACK;		relsim.cam_ch.cam_path_id	= scgp->scsibus;		relsim.cam_ch.cam_target_id	= scgp->target;		relsim.cam_ch.cam_target_lun	= scgp->lun;		relua.uagt_ccb = (struct ccb_header *) & relsim;	/* wrong cast */		relua.uagt_ccblen = sizeof(relsim);		relua.uagt_buffer = NULL;		relua.uagt_buflen = 0;		if (ioctl(f, UAGT_CAM_IO, (caddr_t) & relua) < 0)			errmsg("DEC CAM -> LMA\n");	}	return 0;}