/* @(#)scsi-unixware.c 1.25 01/03/18 Copyright 1998 J. Schilling, Santa Cruz Operation */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-unixware.c 1.25 01/03/18 Copyright 1998 J. Schilling, Santa Cruz Operation";
#endif
/*
* Interface for the SCO UnixWare SCSI implementation.
*
* 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, Santa Cruz Operation
*/
/*
* 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.
*/
#undef sense
#undef SC_PARITY
#undef scb
#include <sys/sysmacros.h>
#include <sys/scsi.h>
#include <sys/sdi_edt.h>
#include <sys/sdi.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-unixware.c-1.25"; /* The version for this transport*/
/* Max. number of scg scsibusses. The real limit would be */
/* MAX_HBA * MAX_BUS (which would be 32 * 8 on UnixWare 2.1/7.x), */
/* but given that we will hardly see such a beast, lets take 32 */
#define MAX_SCG 32
/* maximum defines for UnixWare 2.x/7.x from <sys/sdi_edt.h> */
#define MAX_TGT MAX_EXTCS /* Max # of target id's */
#define MAX_LUN MAX_EXLUS /* Max # of lun's */
#define MAX_DMA (32*1024)
#define MAXLINE 80
#define MAXPATH 256
#define DEV_DIR "/tmp"
#define DEV_NAME "scg.s%1dt%1dl%1d"
#define SCAN_HBA "%d:%d,%d,%d:%7s : %n"
#define SCAN_DEV "%d,%d,%d:%7s : %n"
#define PRIM_HBA "/dev/hba/hba1"
#define SCSI_CFG "LC_ALL=C /etc/scsi/pdiconfig -l"
#define SCAN_ALL "LIBSCG_SCAN_ALL"
typedef struct scg2sdi {
int valid;
int open;
int atapi;
int initiator;
int hba;
int bus;
int tgt;
int lun;
int fd;
dev_t node;
dev_t major;
dev_t minor;
char type[20];
char vend[40];
char devn[32];
} scg2sdi_t;
LOCAL scg2sdi_t sdidevs [MAX_SCG][MAX_TGT][MAX_LUN];
struct scg_local {
short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define scglocal(p) ((struct scg_local *)((p)->local))
LOCAL int unixware_init __PR((SCSI *scgp));
LOCAL int do_scg_cmd __PR((SCSI *scgp, struct scg_cmd *sp));
LOCAL int do_scg_sense __PR((SCSI *scgp, struct scg_cmd *sp));
/* -------------------------------------------------------------------------
** SCO UnixWare 2.1.x / UnixWare 7 provides a scsi pass-through mechanism,
** which can be used to access any configured scsi device.
**
** NOTE: The libscg UnixWare passthrough routines have changed with
** cdrecord-1.8 to enable the -scanbus, -load, -eject option
** regardless of the status of media and the addressing
** scheme is now the same as used on many other platforms like
** Solaris, Linux etc.
**
** ===============================================================
** RUN 'cdrecord -scanbus' TO SEE THE DEVICE ADDRESSES YOU CAN USE
** ===============================================================
*/
/*
* 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);
}
/* ---------------------------------------------------------------
** This routine is introduced to create all device nodes necessary
** to access any detected scsi device. It parses the output of
** /etc/scsi/pdiconfig -l and creates passthru device node for each
** found scsi device apart from the listed hba's.
**
*/
LOCAL int
unixware_init(scgp)
SCSI *scgp;
{
FILE *cmd;
int hba = 0, bus = 0, scg = 0, tgt = 0, lun = 0;
int nscg = -1, lhba = -1, lbus = 0;
int atapi, fd, nopen = 0, pos = 0, len = 0;
int s, t, l;
int scan_disks;
char lines[MAXLINE];
char class[MAXLINE];
char ident[MAXLINE];
char dname[MAXPATH];
struct stat stbuf;
dev_t ptdev, major, minor, node;
char **evsave;
extern char **environ;
/* Check for validity of primary hostbus adapter node */
if (stat(PRIM_HBA, &stbuf) < 0) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Can not stat() primary hba (%s)",
PRIM_HBA);
return (-1);
}
if (!S_ISCHR(stbuf.st_mode)) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Primary hba (%s) not a character device",
PRIM_HBA);
return (-1);
}
major = getmajor(stbuf.st_rdev);
/*
* Check whether we want to scan all devices
*/
if (getenv(SCAN_ALL) != NULL) {
scan_disks = 1;
} else {
scan_disks = 0;
}
/* read pdiconfig output and get all attached scsi devices ! */
evsave = environ;
environ = 0;
if ((cmd = popen(SCSI_CFG,"r")) == NULL) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Error popen() for \"%s\"",
SCSI_CFG);
environ = evsave;
return (-1);
}
environ = evsave;
for (;;) {
if (fgets(lines, MAXLINE, cmd) == NULL)
break;
memset(class, '\0', sizeof(class));
memset(ident, '\0', sizeof(ident));
if (lines[0] == ' ') {
sscanf(lines, SCAN_DEV, &bus, &tgt, &lun, class, &pos);
hba = lhba;
} else {
sscanf(lines, SCAN_HBA, &hba, &bus, &tgt, &lun, class, &pos);
nscg++;
lhba = hba;
atapi = 0;
}
/* We can't sscanf() the ident string of the device */
/* as it may contain characters sscanf() will */
/* recognize as a delimiter. So do a strcpy() instead ! */
len = strlen(lines) - pos - 1; /* don't copy the '\n' */
strncpy(ident, &lines[pos], len);
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"SDI -> %d:%d,%d,%d: %-7s : %s\n",
hba, bus, tgt, lun, class, ident);
}
if (bus != lbus) {
nscg++;
lbus = bus;
}
scg = nscg;
/* check whether we have a HBA or a SCSI device, don't */
/* let HBA's be valid device for cdrecord, but mark */
/* them as a controller (initiator = 1). */
/* Don't detect disks, opening a mounted disk can hang */
/* the disk subsystem !!! So unless we set an */
/* environment variable LIBSCG_SCAN_ALL, we will ignore */
/* disks */
if (strstr(class, "HBA") == NULL) {
if (strstr(class, "DISK") != NULL) {
sdidevs[scg][tgt][lun].valid = scan_disks;
} else {
sdidevs[scg][tgt][lun].valid = 1;
}
} else {
sdidevs[scg][tgt][lun].initiator = 1;
}
/* There is no real flag that shows a HBA as an ATAPI */
/* controller, so as we know the driver is called 'ide' */
/* we can check the ident string for the occurence of it*/
if (strstr(ident, "(ide,") != NULL) {
atapi = 1;
}
/* fill the sdidevs array with all we know now */
sdidevs[scg][tgt][lun].open = 0;
sdidevs[scg][tgt][lun].atapi = atapi;
sdidevs[scg][tgt][lun].hba = hba;
sdidevs[scg][tgt][lun].bus = bus;
sdidevs[scg][tgt][lun].tgt = tgt;
sdidevs[scg][tgt][lun].lun = lun;
strcpy(sdidevs[scg][tgt][lun].type, class);
strcpy(sdidevs[scg][tgt][lun].vend, ident);
js_snprintf(sdidevs[scg][tgt][lun].devn,
sizeof(sdidevs[scg][tgt][lun].devn),
DEV_NAME, scg, tgt, lun);
minor = SDI_MINOR(hba, tgt, lun, bus);
node = makedevice(major, minor);
sdidevs[scg][tgt][lun].major = major;
sdidevs[scg][tgt][lun].minor = minor;
sdidevs[scg][tgt][lun].node = node;
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"h = %d; b = %d, s = %d, t = %d, l = %d, a = %d, ma = %d, mi = %2d, dev = %s, id = %s\n",
hba, bus, scg, tgt, lun,
sdidevs[scg][tgt][lun].atapi,
sdidevs[scg][tgt][lun].major,
sdidevs[scg][tgt][lun].minor,
sdidevs[scg][tgt][lun].devn,
sdidevs[scg][tgt][lun].vend);
}
}
if (pclose(cmd) == -1) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Error pclose() for \"%s\"",
SCSI_CFG);
return (-1);
}
/* create all temporary device nodes */
for (s = 0; s < MAX_SCG; s++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN ; l++) {
if (sdidevs[s][t][l].valid == 0) {
sdidevs[s][t][l].fd = -1;
continue;
}
/* Make pass-through interface device node */
js_snprintf(dname, sizeof(dname),
"%s/%s", DEV_DIR, sdidevs[s][t][l].devn);
ptdev = sdidevs[s][t][l].node;
if (mknod(dname, S_IFCHR | 0700, ptdev) < 0) {
if (errno == EEXIST) {
unlink(dname);
if (mknod(dname, S_IFCHR | 0700, ptdev) < 0) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"mknod() error for \"%s\"", dname);
return (-1);
}
} else {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"mknod() error for \"%s\"", dname);
return (-1);
}
}
/* Open pass-through device node */
if ((fd = open(dname, O_RDONLY)) < 0) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"can not open pass-through %s", dname);
return (-1);
}
sdidevs[s][t][l].fd = fd;
sdidevs[s][t][l].open = 1;
nopen++;
scglocal(scgp)->scgfiles[s][t][l] = (short) fd;
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"s = %d, t = %d, l = %d, dev = %s, fd = %d\n",
s, t, l,
sdidevs[s][t][l].devn,
sdidevs[s][t][l].fd);
}
}
}
}
return (nopen);
}
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);
int c, b, t;
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 (scgp->local == NULL) {
scgp->local = malloc(sizeof(struct scg_local));
if (scgp->local == NULL)
return (0);
for (c = 0; c < MAX_SCG; c++) {
for (b = 0; b < MAX_TGT; b++) {
for (t = 0; t < MAX_LUN ; t++)
scglocal(scgp)->scgfiles[c][b][t] = (short)-1;
}
}
}
memset(sdidevs, 0, sizeof(sdidevs)); /* init tmp_structure */
if (*device != '\0') { /* we don't allow old dev usage */
errno = EINVAL;
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Open by 'devname' no longer supported on this OS");
return (-1);
} else { /* this is the new stuff */
/* it will do the initialisation */
/* and return the number of */
/* detected devices to be used */
/* with the new addressing */
/* scheme. */
return (unixware_init(scgp));
}
}
LOCAL int
scgo_close(scgp)
SCSI *scgp;
{
register int f;
register int b;
register int t;
register int l;
if (scgp->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 = scglocal(scgp)->scgfiles[b][t][l];
if (f >= 0)
close(f);
sdidevs[b][t][l].fd = -1;
sdidevs[b][t][l].open = 0;
sdidevs[b][t][l].valid = 0;
scglocal(scgp)->scgfiles[b][t][l] = (short)-1;
}
}
}
return (0);
}
LOCAL long
scgo_maxdma(scgp, amt)
SCSI *scgp;
long amt;
{
return (MAX_DMA);
}
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 = (void *) valloc((size_t)(amt));
return (scgp->bufbase);
}
LOCAL void
scgo_freebuf(scgp)
SCSI *scgp;
{
if (scgp->bufbase)
free(scgp->bufbase);
scgp->bufbase = NULL;
}
LOCAL BOOL
scgo_havebus(scgp, busno)
SCSI *scgp;
int busno;
{
register int t;
register int l;
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
if (scgp->local == NULL)
return (FALSE);
for (t=0; t < MAX_TGT; t++) {
for (l=0; l < MAX_LUN ; l++)
if (scglocal(scgp)->scgfiles[busno][t][l] >= 0)
return (TRUE);
}
return (FALSE);
}
LOCAL int
scgo_fileno(scgp, busno, tgt, tlun)
SCSI *scgp;
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 (scgp->local == NULL)
return (-1);
return ((int)scglocal(scgp)->scgfiles[busno][tgt][tlun]);
}
LOCAL int
scgo_initiator_id(scgp)
SCSI *scgp;
{
register int t;
register int l;
register int busno;
busno = scg_scsibus(scgp);
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
for (t=0; t < MAX_TGT; t++) {
for (l=0; l < MAX_LUN ; l++)
if (sdidevs[busno][t][l].initiator == 1){
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"scgo_initiator_id: id = %d\n", t);
}
return (t);
}
}
return (-1);
}
LOCAL int
scgo_isatapi(scgp)
SCSI *scgp;
{
/* if the new address method is used we know if this is ATAPI*/
return (sdidevs[scg_scsibus(scgp)][scg_target(scgp)][scg_lun(scgp)].atapi);
}
LOCAL int
scgo_reset(scgp, what)
SCSI *scgp;
int what;
{
errno = EINVAL;
return(-1);
}
LOCAL int
do_scg_cmd(scgp, sp)
SCSI *scgp;
struct scg_cmd *sp;
{
int ret;
int i;
struct sb scsi_cmd;
struct scb *scbp;
memset(&scsi_cmd, 0, sizeof(scsi_cmd));
scsi_cmd.sb_type = ISCB_TYPE;
scbp = &scsi_cmd.SCB;
scbp->sc_cmdpt = (caddr_t) sp->cdb.cmd_cdb;
scbp->sc_cmdsz = sp->cdb_len;
scbp->sc_datapt = sp->addr;
scbp->sc_datasz = sp->size;
if (!(sp->flags & SCG_RECV_DATA) && (sp->size > 0))
scbp->sc_mode = SCB_WRITE;
else
scbp->sc_mode = SCB_READ;
scbp->sc_time = sp->timeout;
errno = 0;
for (;;) {
if ((ret = ioctl(scgp->fd, SDI_SEND, &scsi_cmd)) < 0) {
if (errno == EAGAIN){
sleep(1);
continue;
}
sp->ux_errno = errno;
if (errno == 0)
sp->ux_errno = EIO;
sp->error = SCG_RETRYABLE;
return (ret);
}
break;
}
memset(&sp->u_scb.Scb, 0, sizeof(sp->u_scb.Scb));
sp->u_scb.cmd_scb[0] = scbp->sc_status;
sp->resid = scbp->sc_resid;
sp->ux_errno = errno;
return (0);
}
LOCAL int
do_scg_sense(scgp, sp)
SCSI *scgp;
struct scg_cmd *sp;
{
int ret;
struct scg_cmd s_cmd;
memset((caddr_t)&s_cmd, 0, sizeof(s_cmd));
s_cmd.addr = (caddr_t) 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);
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);
} else {
ret = do_scg_cmd(scgp, sp);
if (ret < 0)
return (ret);
if (sp->u_scb.cmd_scb[0] & S_CKCON)
ret = do_scg_sense(scgp, sp);
return (ret);
}
}
#define sense u_sense.Sense
#undef SC_PARITY
#define SC_PARITY 0x09
#define scb u_scb.Scb
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