/* @(#)scsi-vms.c	1.3 98/10/06 Copyright 1997 J. Schilling */#ifndef lintstatic	char __sccsid[] =	"@(#)scsi-vms.c	1.3 98/10/06 Copyright 1997 J. Schilling";#endif/* *	Interface for the VMS generic SCSI implementation. * *	This is a hack, that tries to emulate the functionality *	of the scg driver. * *	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, 675 Mass Ave, Cambridge, MA 02139, USA. */#include <iodef.h>#include <ssdef.h>#include <descrip.h>#include <starlet.h>#include <string.h>#include <LIB$ROUTINES.H>#define MAX_SCG 	8	/* Max # of SCSI controllers */#define MAX_TGT 	8#define MAX_LUN 	8#define MAX_DMA_VMS	(96*512)/* Check if this is not too big */#define MAX_TMO_VMS	255	/* max value for OpenVMS/AXP 7.1 ehh*/LOCAL	int	scsi_send	__PR((int f, struct scg_cmd *sp));LOCAL	int	do_scsi_cmd	__PR((int f, struct scg_cmd *sp));LOCAL	int	do_scsi_sense	__PR((int f, struct scg_cmd *sp));#define DEVICE_NAMELEN 7struct SCSI$DESC {	Uint	SCSI$L_OPCODE;		/* SCSI Operation Code */	Uint	SCSI$L_FLAGS;		/* SCSI Flags Bit Map */	char	*SCSI$A_CMD_ADDR;	/* ->SCSI command buffer */	Uint	SCSI$L_CMD_LEN; 	/* SCSI command length, bytes */	char	*SCSI$A_DATA_ADDR;	/* ->SCSI data buffer */	Uint	SCSI$L_DATA_LEN;	/* SCSI data length, bytes */	Uint	SCSI$L_PAD_LEN; 	/* SCSI pad length, bytes */	Uint	SCSI$L_PH_CH_TMOUT;	/* SCSI phase change timeout */	Uint	SCSI$L_DISCON_TMOUT;	/* SCSI disconnect timeout */	Uint	SCSI$L_RES_1;		/* Reserved */	Uint	SCSI$L_RES_2;		/* Reserved */	Uint	SCSI$L_RES_3;		/* Reserved */	Uint	SCSI$L_RES_4;		/* Reserved */	Uint	SCSI$L_RES_5;		/* Reserved */	Uint	SCSI$L_RES_6;		/* Reserved */};#ifdef __ALPHA#pragma member_alignment save#pragma nomember_alignment#endifstruct SCSI$IOSB {	Ushort	SCSI$W_VMS_STAT;	/* VMS status code */	Ulong	SCSI$L_IOSB_TFR_CNT;	/* Actual #bytes transferred */	char	SCSI$B_IOSB_FILL_1;	Uchar	SCSI$B_IOSB_STS;	/* SCSI device status */};#ifdef __ALPHA#pragma member_alignment restore#endif#define SCSI$K_GOOD_STATUS	0#define SCSI$K_CHECK_CONDITION 0x2#define SCSI$K_CONDITION_MET 0x4#define SCSI$K_BUSY 0x8#define SCSI$K_INTERMEDIATE 0x10#define SCSI$K_INTERMEDIATE_C_MET 0x14#define SCSI$K_RESERVATION_CONFLICT 0x18#define SCSI$K_COMMAND_TERMINATED 0x22#define SCSI$K_QUEUE_FULL 0x28#define SCSI$K_WRITE		0X0	/* direction of transfer=write */#define SCSI$K_READ		0X1	/* direction of transfer=read */#define SCSI$K_FL_ENAB_DIS	0X2	/* enable disconnects */#define SCSI$K_FL_ENAB_SYNC	0X4	/* enable sync */#define GK_EFN			0	/* Event flag number */static char	gk_device[8];		/* XXX JS hoffentlich gibt es keinen Ueberlauf */static Ushort	gk_chan;static Ushort	transfer_length;static int	i;static int	status;static $DESCRIPTOR(gk_device_desc, gk_device);static struct SCSI$IOSB gk_iosb ;static struct SCSI$DESC gk_desc;EXPORTint scsi_open(device, busno, tgt, tlun)	char	*device;	int	busno;	int	tgt;	int	tlun;{	char	devname[DEVICE_NAMELEN];	char	buschar;	char	buschar1;	if (*device != '\0' || (busno == -2 && tgt == -2)) 		return (-1);	if (busno >= 0 && tgt >= 0 && tlun >= 0) {		if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN)			return (-1);	}	switch (scsibus) {	case 0:	buschar = 'd';		buschar1 = 'a';		break;	case 1:	buschar = 'd';		buschar1 = 'b';		break;	case 2:	buschar = 'd';		buschar1 = 'c';		break;	case 3:	buschar = 'd';		buschar1 = 'd';		break;	case 4:	buschar = 'g';		buschar1 = 'a';		break;	case 5:	buschar = 'g';		buschar1 = 'b';		break;	case 6:	buschar = 'g';		buschar1 = 'c';		break;	case 7:	buschar = 'g';		buschar1 = 'd';		break;	default : comerrno(EX_BAD, "Wrong scsibus-#");		/* Will not return */		return (-1);	}	/* XXX JS XXX devname length snprintf ??? */	sprintf(devname, "%ck%c%d0%d:", buschar, buschar1, target, lun);	strcpy (gk_device, devname);	status = sys$assign(&gk_device_desc, &gk_chan, 0, 0);	if (!(status & 1)) {		printf("Unable to access scsi-device \"%s\"\n", &gk_device[0]);		return (-1);	}	return (status);}LOCAL longscsi_maxdma(){	return (MAX_DMA_VMS);}EXPORTBOOL scsi_havebus(busno)	int	busno;{	if (gk_chan <= 0)		return (FALSE);	return (TRUE);}EXPORTint scsi_fileno(busno, tgt, tlun)	int	busno;	int	tgt;	int	tlun;{	if (gk_chan <= 0)		return (-1);	return (gk_chan);}EXPORTint scsi_isatapi(){	return (FALSE);}EXPORTint scsireset(){	return (-1);}EXPORT void *scsi_getbuf(amt)	long	amt;{	void	*ret;	if (scg_maxdma == 0)		scg_maxdma = scsi_maxdma();	if (amt <= 0 || amt > scg_maxdma)		return ((void *)0);	if (debug)		printf("scsi_getbuf: %ld bytes\n", amt);	ret = malloc((size_t)(amt));	/* XXX JS XXX valloc() ??? */	return (ret);}LOCAL intdo_scsi_cmd(f, sp)	int		f;	struct scg_cmd	*sp;{	char		*cmdadr;	int		notcmdretry;	int		len;	int		severity;	/* XXX JS XXX This cannot be OK */	notcmdretry = (sp->flags & SCG_CMD_RETRY)^SCG_CMD_RETRY;	/* error corrected ehh	*//* XXX JS Wenn das notcmdretry Flag bei VMS auch 0x08 ist und Du darauf hoffst,   XXX	Dasz ich den Wert nie aendere, dann ist das richtig.   XXX Siehe unten: Das gleiche gilt fuer SCG_RECV_DATA und SCG_DISRE_ENA !!!*/	cmdadr = (char *)sp->cdb.cmd_cdb;	/* XXX JS XXX This cannot be OK */	gk_desc.SCSI$L_FLAGS = ((sp->flags & SCG_RECV_DATA) |				(sp->flags & SCG_DISRE_ENA)|				notcmdretry);				/* XXX siehe oben, das ist ein bitweises oder!!! */	gk_desc.SCSI$A_DATA_ADDR = sp->addr;	gk_desc.SCSI$L_DATA_LEN = sp->size;	gk_desc.SCSI$A_CMD_ADDR = cmdadr;	gk_desc.SCSI$L_CMD_LEN = sp->cdb_len;	gk_desc.SCSI$L_PH_CH_TMOUT = sp->timeout;	gk_desc.SCSI$L_DISCON_TMOUT = sp->timeout;	if (gk_desc.SCSI$L_PH_CH_TMOUT > MAX_TMO_VMS)	    gk_desc.SCSI$L_PH_CH_TMOUT = MAX_TMO_VMS;	if (gk_desc.SCSI$L_DISCON_TMOUT > MAX_TMO_VMS)	    gk_desc.SCSI$L_DISCON_TMOUT = MAX_TMO_VMS;	gk_desc.SCSI$L_OPCODE = 1;	/* SCSI Operation Code */	gk_desc.SCSI$L_PAD_LEN = 0;	/* SCSI pad length, bytes */	gk_desc.SCSI$L_RES_1 = 0;	/* Reserved */	gk_desc.SCSI$L_RES_2 = 0;	/* Reserved */	gk_desc.SCSI$L_RES_3 = 0;	/* Reserved */	gk_desc.SCSI$L_RES_4 = 0;	/* Reserved */	gk_desc.SCSI$L_RES_5 = 0;	/* Reserved */	gk_desc.SCSI$L_RES_6 = 0;	/* Reserved */	if (debug) {		printf("***********************************************************\n");		printf("SCSI VMS-I/O parameters\n");		printf("OPCODE: %d", gk_desc.SCSI$L_OPCODE);		printf(" FLAGS: %d\n", gk_desc.SCSI$L_FLAGS);		printf("CMD:");		for (i = 0; i < gk_desc.SCSI$L_CMD_LEN; i++) {			printf("%x ", sp->cdb.cmd_cdb[i]);		}		printf("\n");		printf("DATA_LEN: %d\n", gk_desc.SCSI$L_DATA_LEN);		printf("PH_CH_TMOUT: %d", gk_desc.SCSI$L_PH_CH_TMOUT);		printf(" DISCON_TMOUT: %d\n", gk_desc.SCSI$L_DISCON_TMOUT);	}	status = sys$qiow(GK_EFN, gk_chan, IO$_DIAGNOSE, &gk_iosb, 0, 0,			&gk_desc, sizeof(gk_desc), 0, 0, 0, 0);	if (debug) {		printf("qiow-status: %i\n", status);		printf("VMS status code %i\n",gk_iosb.SCSI$W_VMS_STAT);		printf("Actual #bytes transferred %i\n",gk_iosb.SCSI$L_IOSB_TFR_CNT);		printf("SCSI device status %i\n",gk_iosb.SCSI$B_IOSB_STS);	}	if (!(status & 1)) {		/* Fehlerindikation fuer sys$qiow() */		sp->ux_errno = geterrno();		/* schwerwiegender nicht SCSI bedingter Fehler => return(-1) */		if (sp->ux_errno == ENOTTY || sp->ux_errno == ENXIO ||		    sp->ux_errno == EINVAL || sp->ux_errno == EACCES) {			return (-1);		}	} else {		sp->ux_errno = 0;	}	if (gk_iosb.SCSI$W_VMS_STAT == SS$_NORMAL) {		sp->error = SCG_NO_ERROR;		sp->resid = 0;		return(0);	}	severity = gk_iosb.SCSI$W_VMS_STAT & 0x7;	if (severity < 4) {		sp->error = SCG_RETRYABLE;		sp->ux_errno = EIO;		sp->u_scb.cmd_scb[0] = gk_iosb.SCSI$B_IOSB_STS;		sp->resid = gk_desc.SCSI$L_DATA_LEN - gk_iosb.SCSI$L_IOSB_TFR_CNT;		return(0);	}	if (gk_iosb.SCSI$W_VMS_STAT == SS$_TIMEOUT) {		sp->error = SCG_TIMEOUT;		sp->ux_errno = EIO;		sp->resid = gk_desc.SCSI$L_DATA_LEN;		return(0);	}	sp->error = SCG_FATAL;	sp->ux_errno = EIO;	sp->resid = gk_desc.SCSI$L_DATA_LEN;	return(0);}LOCAL intdo_scsi_sense(f, sp)	int		f;	struct scg_cmd	*sp;{	int		ret;	struct scg_cmd	s_cmd;	if (sp->sense_len > SCG_MAX_SENSE)		sp->sense_len = SCG_MAX_SENSE;	fillbytes((caddr_t)&s_cmd, sizeof(s_cmd), '\0');	s_cmd.addr = (char *)sp->u_sense.cmd_sense;	s_cmd.size = sp->sense_len;	s_cmd.flags = SCG_RECV_DATA|SCG_DISRE_ENA;	s_cmd.cdb_len = SC_G0_CDBLEN;	s_cmd.sense_len = CCS_SENSE_LEN;	s_cmd.target = target;	s_cmd.cdb.g0_cdb.cmd = SC_REQUEST_SENSE;	s_cmd.cdb.g0_cdb.lun = sp->cdb.g0_cdb.lun;	s_cmd.cdb.g0_cdb.count = sp->sense_len;	ret = do_scsi_cmd(f, &s_cmd);	if (ret < 0)		return (ret);	if (s_cmd.u_scb.cmd_scb[0] & 02) {		/* XXX ??? Check condition on request Sense ??? */	}	sp->sense_count = sp->sense_len - s_cmd.resid;	return (ret);}LOCAL intscsi_send(f, sp)	int		f;	struct scg_cmd	*sp;{	int	ret;	if (f < 0) {		sp->error = SCG_FATAL;		return (0);	}	ret = do_scsi_cmd(f, sp);	if (ret < 0)		return (ret);	if (sp->u_scb.cmd_scb[0] & 02)		ret = do_scsi_sense(f, sp);	return (ret);}