/* @(#)scsi-vms.c 1.29 01/03/18 Copyright 1997 J. Schilling */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-vms.c 1.29 01/03/18 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.
*
* 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, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iodef.h>
#include <ssdef.h>
#include <descrip.h>
#include <starlet.h>
#include <string.h>
#include <LIB$ROUTINES.H>
/*
* Warning: you may change this source, but if you do that
* you need to change the _scg_version and _scg_auth* string below.
* You may not return "schily" for an SCG_AUTHOR request anymore.
* Choose your name instead of "schily" and make clear that the version
* string is related to a modified source.
*/
LOCAL char _scg_trans_version[] = "scsi-vms.c-1.29"; /* The version for this transport*/
#define MAX_SCG 16 /* Max # of SCSI controllers */
#define MAX_TGT 16
#define MAX_LUN 8
#define MAX_DMA_VMS (63*1024) /* Check if this is not too big */
#define MAX_PHSTMO_VMS 300
#define MAX_DSCTMO_VMS ((64*1024)-1) /* max value for OpenVMS/AXP 7.1 ehh*/
LOCAL int do_scg_cmd __PR((SCSI *scgp, struct scg_cmd *sp));
LOCAL int do_scg_sense __PR((SCSI *scgp, struct scg_cmd *sp));
#define DEVICE_NAMELEN 8
struct SCSI$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$L_RES_6; /* Reserved */
};
#ifdef __ALPHA
#pragma member_alignment save
#pragma nomember_alignment
#endif
struct SCSI$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;
static FILE *fp;
struct scg_local {
Ushort gk_chan;
};
#define scglocal(p) ((struct scg_local *)((p)->local))
/*
* 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_open(scgp, device)
SCSI *scgp;
char *device;
{
int busno = scg_scsibus(scgp);
int tgt = scg_target(scgp);
int tlun = scg_lun(scgp);
char devname[DEVICE_NAMELEN];
char buschar;
char buschar1;
char buschar2;
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);
}
switch (busno) {
case 0: buschar = 'd';
buschar1 = 'k';
buschar2 = 'a';
break;
case 1: buschar = 'd';
buschar1 = 'k';
buschar2 = 'b';
break;
case 2: buschar = 'd';
buschar1 = 'k';
buschar2 = 'c';
break;
case 3: buschar = 'd';
buschar1 = 'k';
buschar2 = 'd';
break;
case 4: buschar = 'g';
buschar1 = 'k';
buschar2 = 'a';
break;
case 5: buschar = 'g';
buschar1 = 'k';
buschar2 = 'b';
break;
case 6: buschar = 'g';
buschar1 = 'k';
buschar2 = 'c';
break;
case 7: buschar = 'g';
buschar1 = 'k';
buschar2 = 'd';
break;
case 8: buschar = 'd';
buschar1 = 'q';
buschar2 = 'a';
break;
case 9: buschar = 'd';
buschar1 = 'q';
buschar2 = 'b';
break;
case 10: buschar = 'd';
buschar1 = 'q';
buschar2 = 'c';
break;
case 11: buschar = 'd';
buschar1 = 'q';
buschar2 = 'd';
break;
default :
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Wrong scsibus-# (%d)", busno);
return (-1);
}
js_snprintf(devname, sizeof(devname), "%c%c%c%d0%d:",
buschar, buschar1, buschar2,
tgt, tlun);
strcpy (gk_device, devname);
status = sys$assign(&gk_device_desc, &gk_chan, 0, 0);
if (!(status & 1)) {
js_fprintf((FILE *)scgp->errfile,
"Unable to access scsi-device \"%s\"\n", &gk_device[0]);
return (-1);
}
if (scgp->debug > 0) {
fp = fopen("cdrecord_io.log", "w", "rfm=stmlf", "rat=cr");
if (fp == NULL) {
perror("Failing opening i/o-logfile");
exit(SS$_NORMAL);
}
}
return (status);
}
LOCAL int
scgo_close(scgp)
SCSI *scgp;
{
/*
* XXX close gk_chan ???
*/
/*
* sys$dassgn()
*/
status=sys$dassgn(gk_chan);
return (status);
}
LOCAL long
scgo_maxdma(scgp, amt)
SCSI *scgp;
long amt;
{
return (MAX_DMA_VMS);
}
LOCAL BOOL
scgo_havebus(scgp, busno)
SCSI *scgp;
int busno;
{
if (gk_chan <= 0)
return (FALSE);
return (TRUE);
}
LOCAL int
scgo_fileno(scgp, busno, tgt, tlun)
SCSI *scgp;
int busno;
int tgt;
int tlun;
{
if (gk_chan <= 0)
return (-1);
return (gk_chan);
}
LOCAL int
scgo_initiator_id(scgp)
SCSI *scgp;
{
return (-1);
}
LOCAL int
scgo_isatapi(scgp)
SCSI *scgp;
{
int busno = scg_scsibus(scgp);
if (busno >= 8)
return (TRUE);
return (FALSE);
}
LOCAL int
scgo_reset(scgp, what)
SCSI *scgp;
int what;
{
errno = EINVAL;
return (-1);
}
LOCAL void *
scgo_getbuf(scgp, amt)
SCSI *scgp;
long amt;
{
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"scgo_getbuf: %ld bytes\n", amt);
}
scgp->bufbase = malloc((size_t)(amt)); /* XXX JS XXX valloc() ??? */
return (scgp->bufbase);
}
LOCAL void
scgo_freebuf(scgp)
SCSI *scgp;
{
if (scgp->bufbase)
free(scgp->bufbase);
scgp->bufbase = NULL;
}
LOCAL int
do_scg_cmd(scgp, sp)
SCSI *scgp;
struct scg_cmd *sp;
{
char *cmdadr;
int notcmdretry;
int len;
Uchar scsi_sts;
int severity;
/* XXX JS XXX This cannot be OK */
notcmdretry = (sp->flags & SCG_CMD_RETRY)^SCG_CMD_RETRY;
/* error corrected ehh */
/* XXX JS Wenn das notcmdretry Flag bei VMS auch 0x08 ist und Du darauf hoffst,
* XXX Dasz ich den Wert nie aendere, dann ist das richtig.
* XXX Siehe unten: Das gleiche gilt fuer SCG_RECV_DATA und SCG_DISRE_ENA !!!
*/
cmdadr = (char *)sp->cdb.cmd_cdb;
/* XXX JS XXX This cannot be OK */
gk_desc.SCSI$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$L_PH_CH_TMOUT > MAX_PHSTMO_VMS)
gk_desc.SCSI$L_PH_CH_TMOUT = MAX_PHSTMO_VMS;
if (gk_desc.SCSI$L_DISCON_TMOUT > MAX_DSCTMO_VMS)
gk_desc.SCSI$L_DISCON_TMOUT = MAX_DSCTMO_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 (scgp->debug > 0) {
js_fprintf(fp, "***********************************************************\n");
js_fprintf(fp, "SCSI VMS-I/O parameters\n");
js_fprintf(fp, "OPCODE: %d", gk_desc.SCSI$L_OPCODE);
js_fprintf(fp, " FLAGS: %d\n", gk_desc.SCSI$L_FLAGS);
js_fprintf(fp, "CMD:");
for (i = 0; i < gk_desc.SCSI$L_CMD_LEN; i++) {
js_fprintf(fp, "%x ", sp->cdb.cmd_cdb[i]);
}
js_fprintf(fp, "\n");
js_fprintf(fp, "DATA_LEN: %d\n", gk_desc.SCSI$L_DATA_LEN);
js_fprintf(fp, "PH_CH_TMOUT: %d", gk_desc.SCSI$L_PH_CH_TMOUT);
js_fprintf(fp, " DISCON_TMOUT: %d\n", gk_desc.SCSI$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 (scgp->debug > 0) {
js_fprintf(fp, "qiow-status: %i\n", status);
js_fprintf(fp, "VMS status code %i\n", gk_iosb.SCSI$W_VMS_STAT);
js_fprintf(fp, "Actual #bytes transferred %i\n", gk_iosb.SCSI$L_IOSB_TFR_CNT);
js_fprintf(fp, "SCSI device status %i\n", gk_iosb.SCSI$B_IOSB_STS);
if (gk_iosb.SCSI$L_IOSB_TFR_CNT != gk_desc.SCSI$L_DATA_LEN) {
js_fprintf(fp, "#bytes transferred != DATA_LEN\n");
}
}
if (!(status & 1)) { /* Fehlerindikation fuer sys$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);
}
if (sp->ux_errno == 0)
sp->ux_errno == EIO;
} else {
sp->ux_errno = 0;
}
sp->resid = gk_desc.SCSI$L_DATA_LEN - gk_iosb.SCSI$L_IOSB_TFR_CNT;
if (scgo_isatapi(scgp)) {
scsi_sts = ((gk_iosb.SCSI$B_IOSB_STS >> 5) & 0x7);
} else {
scsi_sts = gk_iosb.SCSI$B_IOSB_STS;
}
if (gk_iosb.SCSI$W_VMS_STAT == SS$_NORMAL && scsi_sts == 0) {
sp->error = SCG_NO_ERROR;
if (scgp->debug > 0) {
js_fprintf(fp, "scsi_sts == 0\n");
js_fprintf(fp, "gk_iosb.SCSI$B_IOSB_STS == 0\n");
js_fprintf(fp, "sp->error %i\n", sp->error);
js_fprintf(fp, "sp->resid %i\n", sp->resid);
}
return(0);
}
severity = gk_iosb.SCSI$W_VMS_STAT & 0x7;
if (severity == 4) {
sp->error = SCG_FATAL;
if (scgp->debug > 0) {
js_fprintf(fp, "scsi_sts & 2\n");
js_fprintf(fp, "gk_iosb.SCSI$B_IOSB_STS & 2\n");
js_fprintf(fp, "gk_iosb.SCSI$W_VMS_STAT & 0x7 == SS$_FATAL\n");
js_fprintf(fp, "sp->error %i\n", sp->error);
}
return (0);
}
if (gk_iosb.SCSI$W_VMS_STAT == SS$_TIMEOUT) {
sp->error = SCG_TIMEOUT;
if (scgp->debug > 0) {
js_fprintf(fp, "scsi_sts & 2\n");
js_fprintf(fp, "gk_iosb.SCSI$B_IOSB_STS & 2\n");
js_fprintf(fp, "gk_iosb.SCSI$W_VMS_STAT == SS$_TIMEOUT\n");
js_fprintf(fp, "sp->error %i\n", sp->error);
}
return (0);
}
sp->error = SCG_RETRYABLE;
sp->u_scb.cmd_scb[0] = scsi_sts;
if (scgp->debug > 0) {
js_fprintf(fp, "scsi_sts & 2\n");
js_fprintf(fp, "gk_iosb.SCSI$B_IOSB_STS & 2\n");
js_fprintf(fp, "gk_iosb.SCSI$W_VMS_STAT != 0\n");
js_fprintf(fp, "sp->error %i\n", sp->error);
}
return(0);
}
LOCAL int
do_scg_sense(scgp, sp)
SCSI *scgp;
struct scg_cmd *sp;
{
int ret;
struct scg_cmd s_cmd;
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.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_scg_cmd(scgp, &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 int
scgo_send(scgp)
SCSI *scgp;
{
struct scg_cmd *sp = scgp->scmd;
int ret;
if (scgp->fd < 0) {
sp->error = SCG_FATAL;
return (0);
}
ret = do_scg_cmd(scgp, sp);
if (ret < 0)
return (ret);
if (sp->u_scb.cmd_scb[0] & 02)
ret = do_scg_sense(scgp, sp);
return (ret);
}
syntax highlighted by Code2HTML, v. 0.9.1