/* @(#)scsi-aix.c 1.36 04/01/14 Copyright 1997 J. Schilling */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-aix.c 1.36 04/01/14 Copyright 1997 J. Schilling";
#endif
/*
* Interface for the AIX 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <sys/scdisk.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-aix.c-1.36"; /* The version for this transport*/
#define MAX_SCG 16 /* Max # of SCSI controllers */
#define MAX_TGT 16
#define MAX_LUN 8
struct scg_local {
short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define scglocal(p) ((struct scg_local *)((p)->local))
#define MAX_DMA_AIX (64*1024)
LOCAL int do_scg_cmd __PR((SCSI *scgp, struct scg_cmd *sp));
LOCAL int do_scg_sense __PR((SCSI *scgp, struct scg_cmd *sp));
/*
* 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_help(scgp, f)
SCSI *scgp;
FILE *f;
{
__scg_help(f, "DKIOCMD", "SCSI transport for targets known by AIX drivers",
"", "bus,target,lun or UNIX device", "1,2,0 or /dev/rcd0@", FALSE, TRUE);
return (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);
register int f;
register int b;
register int t;
register int l;
register int nopen = 0;
char devname[32];
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 (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] = (short)-1;
}
}
}
if ((device != NULL && *device != '\0') || (busno == -2 && tgt == -2))
goto openbydev;
if (busno >= 0 && tgt >= 0 && tlun >= 0) {
js_snprintf(devname, sizeof (devname), "/dev/rcd%d", tgt);
f = openx(devname, 0, 0, SC_DIAGNOSTIC);
if (f < 0) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Cannot open '%s'. Specify device number (1 for cd1) as target (1,0)",
devname);
return (0);
}
scglocal(scgp)->scgfiles[busno][tgt][tlun] = f;
return (1);
} else {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Unable to scan on AIX");
return (0);
}
openbydev:
if (device != NULL && *device != '\0' && busno >= 0 && tgt >= 0 && tlun >= 0) {
f = openx(device, 0, 0, SC_DIAGNOSTIC);
if (f < 0) {
if (scgp->errstr)
js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
"Cannot open '%s'",
devname);
return (0);
}
scglocal(scgp)->scgfiles[busno][tgt][tlun] = f;
scg_settarget(scgp, busno, tgt, tlun);
return (++nopen);
}
return (nopen);
}
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);
scglocal(scgp)->scgfiles[b][t][l] = (short)-1;
}
}
}
return (0);
}
LOCAL long
scgo_maxdma(scgp, amt)
SCSI *scgp;
long amt;
{
return (MAX_DMA_AIX);
}
#define palign(x, a) (((char *)(x)) + ((a) - 1 - (((UIntptr_t)((x)-1))%(a))))
LOCAL void *
scgo_getbuf(scgp, amt)
SCSI *scgp;
long amt;
{
void *ret;
int pagesize;
#ifdef _SC_PAGESIZE
pagesize = sysconf(_SC_PAGESIZE);
#else
pagesize = getpagesize();
#endif
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"scgo_getbuf: %ld bytes\n", amt);
}
/*
* Damn AIX is a paged system but has no valloc()
*/
scgp->bufbase = ret = malloc((size_t)(amt+pagesize));
if (ret == NULL)
return (ret);
ret = palign(ret, pagesize);
return (ret);
}
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;
{
return (-1);
}
LOCAL int
scgo_isatapi(scgp)
SCSI *scgp;
{
return (FALSE);
}
LOCAL int
scgo_reset(scgp, what)
SCSI *scgp;
int what;
{
if (what == SCG_RESET_NOP)
return (0);
if (what != SCG_RESET_BUS) {
errno = EINVAL;
return (-1);
}
/*
* XXX Does this reset TGT or BUS ???
*/
return (ioctl(scgp->fd, SCIORESET, IDLUN(scg_target(scgp), scg_lun(scgp))));
}
LOCAL int
do_scg_cmd(scgp, sp)
SCSI *scgp;
struct scg_cmd *sp;
{
struct sc_iocmd req;
int ret;
if (sp->cdb_len > 12)
comerrno(EX_BAD, "Can't do %d byte command.\n", sp->cdb_len);
fillbytes(&req, sizeof (req), '\0');
req.flags = SC_ASYNC;
if (sp->flags & SCG_RECV_DATA) {
req.flags |= B_READ;
} else if (sp->size > 0) {
req.flags |= B_WRITE;
}
req.data_length = sp->size;
req.buffer = sp->addr;
req.timeout_value = sp->timeout;
req.command_length = sp->cdb_len;
movebytes(&sp->cdb, req.scsi_cdb, 12);
errno = 0;
ret = ioctl(scgp->fd, DKIOCMD, &req);
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile, "ret: %d errno: %d (%s)\n", ret, errno, errmsgstr(errno));
js_fprintf((FILE *)scgp->errfile, "data_length: %d\n", req.data_length);
js_fprintf((FILE *)scgp->errfile, "buffer: 0x%X\n", req.buffer);
js_fprintf((FILE *)scgp->errfile, "timeout_value: %d\n", req.timeout_value);
js_fprintf((FILE *)scgp->errfile, "status_validity: %d\n", req.status_validity);
js_fprintf((FILE *)scgp->errfile, "scsi_bus_status: 0x%X\n", req.scsi_bus_status);
js_fprintf((FILE *)scgp->errfile, "adapter_status: 0x%X\n", req.adapter_status);
js_fprintf((FILE *)scgp->errfile, "adap_q_status: 0x%X\n", req.adap_q_status);
js_fprintf((FILE *)scgp->errfile, "q_tag_msg: 0x%X\n", req.q_tag_msg);
js_fprintf((FILE *)scgp->errfile, "flags: 0X%X\n", req.flags);
}
if (ret < 0) {
sp->ux_errno = geterrno();
/*
* Check if SCSI command cound not be send at all.
*/
if (sp->ux_errno == ENOTTY || sp->ux_errno == ENXIO ||
sp->ux_errno == EINVAL || sp->ux_errno == EACCES) {
return (-1);
}
} else {
sp->ux_errno = 0;
}
ret = 0;
sp->sense_count = 0;
sp->resid = 0; /* AIX is the same rubbish as Linux here */
fillbytes(&sp->scb, sizeof (sp->scb), '\0');
fillbytes(&sp->u_sense.cmd_sense, sizeof (sp->u_sense.cmd_sense), '\0');
if (req.status_validity == 0) {
sp->error = SCG_NO_ERROR;
return (0);
}
if (req.status_validity & 1) {
sp->u_scb.cmd_scb[0] = req.scsi_bus_status;
sp->error = SCG_RETRYABLE;
}
if (req.status_validity & 2) {
if (req.adapter_status & SC_NO_DEVICE_RESPONSE) {
sp->error = SCG_FATAL;
} else if (req.adapter_status & SC_CMD_TIMEOUT) {
sp->error = SCG_TIMEOUT;
} else if (req.adapter_status != 0) {
sp->error = SCG_RETRYABLE;
}
}
return (ret);
}
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 = 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