www.pudn.com > cdrecord.zip > scsi-bsd.c
/* @(#)scsi-bsd.c 1.14 98/10/09 Copyright 1997 J. Schilling */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-bsd.c 1.14 98/10/09 Copyright 1997 J. Schilling";
#endif
/*
* Interface for the NetBSD/FreeBSD/OpenBSD generic SCSI implementation.
*
* This is a hack, that tries to emulate the functionality
* of the scg driver.
* The SCSI tranport of the generic *BSD implementation is very
* similar to the SCSI command transport of the
* 6 years older 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.
*/
#ifndef HAVE_CAMLIB_H
#undef sense
#include
#define MAX_SCG 4 /* Max # of SCSI controllers */
#define MAX_TGT 8
#define MAX_LUN 8
LOCAL short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
/*#define MAX_DMA_BSD (32*1024)*/
#define MAX_DMA_BSD (60*1024) /* More seems to make problems */
#if defined(__NetBSD__) && defined(TYPE_ATAPI)
/*
* NetBSD 1.3 has a merged SCSI/ATAPI system, so this structure
* is slightly different.
*/
#define MAYBE_ATAPI
#define SADDR_ISSCSI(a) ((a).type == TYPE_SCSI)
#define SADDR_BUS(a) (SADDR_ISSCSI(a)?(a).addr.scsi.scbus:(MAX_SCG-1))
#define SADDR_TARGET(a) (SADDR_ISSCSI(a)?(a).addr.scsi.target:(a).addr.atapi.atbus*2+(a).addr.atapi.drive)
#define SADDR_LUN(a) (SADDR_ISSCSI(a)?(a).addr.scsi.lun:0)
#else
#define SADDR_ISSCSI(a) (1)
#define SADDR_BUS(a) (a).scbus
#define SADDR_TARGET(a) (a).target
#define SADDR_LUN(a) (a).lun
#endif /* __NetBSD__ && TYPE_ATAPI */
LOCAL int scsi_send __PR((int f, struct scg_cmd *sp));
LOCAL BOOL scsi_setup __PR((int f, int busno, int tgt, int tlun));
EXPORT
int scsi_open(device, busno, tgt, tlun)
char *device;
int busno;
int tgt;
int tlun;
{
register int f;
register int b;
register int t;
register int l;
register int nopen = 0;
char devname[64];
for (b=0; b < MAX_SCG; b++) {
for (t=0; t < MAX_TGT; t++) {
for (l=0; l < MAX_LUN ; l++)
scgfiles[b][t][l] = (short)-1;
}
}
if (*device != '\0' || (busno == -2 && tgt == -2))
goto openbydev;
if (busno >= 0 && tgt >= 0 && tlun >= 0) {
if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN)
return (-1);
sprintf(devname, "/dev/su%d-%d-%d", busno, tgt, tlun);
f = open(devname, O_RDWR);
if (f < 0) {
goto openbydev;
}
scgfiles[busno][tgt][tlun] = f;
return(1);
} else for (b=0; b < MAX_SCG; b++) {
for (t=0; t < MAX_TGT; t++) {
for (l=0; l < MAX_LUN ; l++) {
sprintf(devname, "/dev/su%d-%d-%d", b, t, l);
f = open(devname, O_RDWR);
/* error("open (%s) = %d\n", devname, f);*/
if (f < 0) {
if (errno != ENOENT &&
errno != ENXIO &&
errno != ENODEV)
comerr("Cannot open '%s'.\n", devname);
} else {
if (scsi_setup(f, b, t, l))
nopen++;
}
}
}
}
/*
* Could not open /dev/su-* or got dev=devname:b,l,l / dev=devname:@,l
* We do the apropriate tests and try our best.
*/
openbydev:
if (nopen == 0) {
struct scsi_addr saddr;
if (device[0] == '\0')
return (0);
f = open(device, O_RDWR);
if (f < 0)
return (0);
if (tgt == -2) {
if (ioctl(f, SCIOCIDENTIFY, &saddr) < 0) {
close(f);
errno = EINVAL;
return (0);
}
scsibus = busno = SADDR_BUS(saddr);
target = tgt = SADDR_TARGET(saddr);
if ((tlun >= 0) && (tlun != SADDR_LUN(saddr))) {
close(f);
errno = EINVAL;
return (0);
}
lun = tlun = SADDR_LUN(saddr);
}
if (scsi_setup(f, busno, tgt, tlun))
nopen++;
}
return (nopen);
}
LOCAL BOOL
scsi_setup(f, busno, tgt, tlun)
int f;
int busno;
int tgt;
int tlun;
{
struct scsi_addr saddr;
int Bus;
int Target;
int Lun;
BOOL onetarget = FALSE;
if (scsibus >= 0 && target >= 0 && lun >= 0)
onetarget = TRUE;
if (ioctl(f, SCIOCIDENTIFY, &saddr) < 0) {
errmsg("Cannot get SCSI addr.\n");
close(f);
return (FALSE);
}
Bus = SADDR_BUS(saddr);
Target = SADDR_TARGET(saddr);
Lun = SADDR_LUN(saddr);
if (debug)
printf("Bus: %d Target: %d Lun: %d\n", Bus, Target, Lun);
if (Bus >= MAX_SCG || Target >= 8 || Lun >= 8) {
close(f);
return (FALSE);
}
if (scgfiles[Bus][Target][Lun] == (short)-1)
scgfiles[Bus][Target][Lun] = (short)f;
if (onetarget) {
if (Bus == busno && Target == tgt && Lun == tlun) {
return (TRUE);
} else {
scgfiles[Bus][Target][Lun] = (short)-1;
close(f);
}
}
return (FALSE);
}
LOCAL long
scsi_maxdma()
{
long maxdma = MAX_DMA_BSD;
return (maxdma);
}
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 = valloc((size_t)(amt));
return (ret);
}
EXPORT
BOOL scsi_havebus(busno)
int busno;
{
register int t;
register int l;
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
for (t=0; t < MAX_TGT; t++) {
for (l=0; l < MAX_LUN ; l++)
if (scgfiles[busno][t][l] >= 0)
return (TRUE);
}
return (FALSE);
}
EXPORT
int scsi_fileno(busno, tgt, tlun)
int busno;
int tgt;
int tlun;
{
if (busno < 0 || busno >= MAX_SCG ||
tgt < 0 || tgt >= MAX_TGT ||
tlun < 0 || tlun >= MAX_LUN)
return (-1);
return ((int)scgfiles[busno][tgt][tlun]);
}
EXPORT
int scsi_isatapi()
{
#ifdef MAYBE_ATAPI
int f = scsi_fileno(scsibus, target, lun);
struct scsi_addr saddr;
if (ioctl(f, SCIOCIDENTIFY, &saddr) < 0)
return (-1);
if (!SADDR_ISSCSI(saddr))
return (TRUE);
#endif
return (FALSE);
}
EXPORT
int scsireset()
{
int f = scsi_fileno(scsibus, target, lun);
return (ioctl(f, SCIOCRESET, 0));
}
LOCAL int
scsi_send(int f, struct scg_cmd *sp)
{
scsireq_t req;
register long *lp1;
register long *lp2;
int ret = 0;
/* printf("f: %d\n", f);*/
if (f < 0) {
sp->error = SCG_FATAL;
return (0);
}
req.flags = SCCMD_ESCAPE; /* We set the SCSI cmd len */
if (sp->flags & SCG_RECV_DATA)
req.flags |= SCCMD_READ;
else if (sp->size > 0)
req.flags |= SCCMD_WRITE;
req.timeout = sp->timeout * 1000;
lp1 = (long *)sp->cdb.cmd_cdb;
lp2 = (long *)req.cmd;
*lp2++ = *lp1++;
*lp2++ = *lp1++;
*lp2++ = *lp1++;
*lp2++ = *lp1++;
req.cmdlen = sp->cdb_len;
req.databuf = sp->addr;
req.datalen = sp->size;
req.datalen_used = 0;
fillbytes(req.sense, sizeof(req.sense), '\0');
if (sp->sense_len > sizeof(req.sense))
req.senselen = sizeof(req.sense);
else if (sp->sense_len < 0)
req.senselen = 0;
else
req.senselen = sp->sense_len;
req.senselen_used = 0;
req.status = 0;
req.retsts = 0;
req.error = 0;
if (ioctl(f, SCIOCCOMMAND, (void *)&req) < 0) {
ret = -1;
sp->ux_errno = geterrno();
if (sp->ux_errno != ENOTTY)
ret = 0;
} else {
sp->ux_errno = 0;
if (req.retsts != SCCMD_OK)
sp->ux_errno = EIO;
}
fillbytes(&sp->scb, sizeof(sp->scb), '\0');
fillbytes(&sp->u_sense.cmd_sense, sizeof(sp->u_sense.cmd_sense), '\0');
sp->resid = req.datalen - req.datalen_used;
sp->sense_count = req.senselen_used;
if (sp->sense_count > SCG_MAX_SENSE)
sp->sense_count = SCG_MAX_SENSE;
movebytes(req.sense, sp->u_sense.cmd_sense, sp->sense_count);
sp->u_scb.cmd_scb[0] = req.status;
switch (req.retsts) {
case SCCMD_OK:
#ifdef BSD_SCSI_SENSE_BUG
sp->u_scb.cmd_scb[0] = 0;
sp->ux_errno = 0;
#endif
sp->error = SCG_NO_ERROR; break;
case SCCMD_TIMEOUT: sp->error = SCG_TIMEOUT; break;
default:
case SCCMD_BUSY: sp->error = SCG_RETRYABLE; break;
case SCCMD_SENSE: sp->error = SCG_RETRYABLE; break;
case SCCMD_UNKNOWN: sp->error = SCG_FATAL; break;
}
return (ret);
}
#define sense u_sense.Sense
#else /* BSD_CAM */
/*
* Interface for the FreeBSD CAM passthrough device.
*
* Copyright (c) 1998 Michael Smith
* Copyright (c) 1998 Kenneth D. Merry
* Copyright (c) 1998 Joerg Schilling
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#undef sense
#define scsi_sense CAM_scsi_sense
#define scsi_inquiry CAM_scsi_inquiry
#include
#include
#include
#include
#include
#include
#define CAM_MAXDEVS 128
struct cam_device *cam_devices[CAM_MAXDEVS + 1];
/*
* Build a list of everything we can find.
*/
EXPORT
int scsi_open(device, busno, tgt, tlun)
char *device;
int busno;
int tgt;
int tlun;
{
struct cam_device *dev;
char name[16];
int unit;
int nopen = 0;
union ccb ccb;
int bufsize;
struct periph_match_pattern *match_pat;
int fd;
for (unit = 0; unit <= CAM_MAXDEVS; unit++) {
cam_devices[unit] = (struct cam_device *)-1;
}
/*
* If we're not scanning the bus, just open one device.
*/
if (busno >= 0 && tgt >= 0 && tlun >= 0) {
cam_devices[0] = cam_open_btl(busno, tgt, tlun, O_RDWR, NULL);
if (cam_devices[0] == NULL)
return(-1);
nopen++;
return(nopen);
}
/*
* First open the transport layer device. There's no point in the
* rest of this if we can't open it.
*/
if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) {
errmsg("Open of %s failed.\n", XPT_DEVICE); /* XXX Should be removed */
return(-1);
}
fillbytes(&ccb, sizeof(union ccb), '\0');
/*
* Get a list of up to CAM_MAXDEVS passthrough devices in the
* system.
*/
ccb.ccb_h.func_code = XPT_DEV_MATCH;
/*
* Setup the result buffer.
*/
bufsize = sizeof(struct dev_match_result) * CAM_MAXDEVS;
ccb.cdm.match_buf_len = bufsize;
ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
if (ccb.cdm.matches == NULL) {
errmsg("Couldn't malloc match buffer.\n"); /* XXX Should be removed */
close(fd);
return(-1);
}
ccb.cdm.num_matches = 0;
/*
* Setup the pattern buffer. We're matching against all
* peripherals named "pass".
*/
ccb.cdm.num_patterns = 1;
ccb.cdm.pattern_buf_len = sizeof(struct dev_match_pattern);
ccb.cdm.patterns = (struct dev_match_pattern *)malloc(
sizeof(struct dev_match_pattern));
if (ccb.cdm.patterns == NULL) {
errmsg("Couldn't malloc pattern buffer.\n"); /* XXX Should be removed */
close(fd);
free(ccb.cdm.matches);
return(-1);
}
ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH;
match_pat = &ccb.cdm.patterns[0].pattern.periph_pattern;
sprintf(match_pat->periph_name, "pass");
match_pat->flags = PERIPH_MATCH_NAME;
if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
errmsg("CAMIOCOMMAND ioctl failed.\n"); /* XXX Should be removed */
close(fd);
free(ccb.cdm.matches);
free(ccb.cdm.patterns);
return(-1);
}
if ((ccb.ccb_h.status != CAM_REQ_CMP)
|| ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
&& (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
errmsgno(EX_BAD, "Got CAM error 0x%X, CDM error %d.\n",
ccb.ccb_h.status, ccb.cdm.status);
close(fd);
free(ccb.cdm.matches);
free(ccb.cdm.patterns);
return(-1);
}
free(ccb.cdm.patterns);
close(fd);
for (unit = 0; unit < MIN(CAM_MAXDEVS, ccb.cdm.num_matches); unit++) {
struct periph_match_result *periph_result;
/*
* We shouldn't have anything other than peripheral
* matches in here. If we do, it means an error in the
* device matching code in the transport layer.
*/
if (ccb.cdm.matches[unit].type != DEV_MATCH_PERIPH) {
errmsgno(EX_BAD,
"Kernel error! got periph match type %d!!\n",
ccb.cdm.matches[unit].type);
free(ccb.cdm.matches);
return(-1);
}
periph_result = &ccb.cdm.matches[unit].result.periph_result;
sprintf(name, "/dev/%s%d", periph_result->periph_name,
periph_result->unit_number);
/*
* cam_open_pass() avoids all lookup and translation from
* "regular device name" to passthrough unit number and
* just opens the device in question as a passthrough device.
*/
cam_devices[unit] = cam_open_pass(name, O_RDWR, NULL);
/*
* If we get back NULL from the open routine, it wasn't
* able to open the given passthrough device for one reason
* or another.
*/
if (cam_devices[unit] == NULL) {
errmsgno(EX_BAD, "Error opening /dev/%s%d\n",
periph_result->periph_name,
periph_result->unit_number);
errmsgno(EX_BAD, "%s\n", cam_errbuf);
break;
}
nopen++;
}
free(ccb.cdm.matches);
return (nopen);
}
LOCAL
long scsi_maxdma()
{
return (MAXPHYS);
}
EXPORT void *
scsi_getbuf(amt)
long amt;
{
void *ret;
if (scg_maxdma == 0)
scg_maxdma = MAXPHYS;
if (amt <= 0 || amt > scg_maxdma)
return ((void *)0);
if (debug)
printf("scsi_getbuf: %ld bytes\n", amt);
ret = valloc((size_t)(amt));
return (ret);
}
EXPORT
BOOL scsi_havebus(int busno)
{
int unit;
/*
* There's a "cleaner" way to do this, using the matching code, but
* it would involve more code than this solution...
*/
for (unit = 0; cam_devices[unit] != (struct cam_device *)-1; unit++) {
if (cam_devices[unit] == NULL)
continue;
if (cam_devices[unit]->path_id == busno)
return (TRUE);
}
return (FALSE);
}
EXPORT
int scsi_fileno(bus, unit, lun)
{
int i;
for (i = 0; cam_devices[i] != (struct cam_device *)-1; i++) {
if (cam_devices[i] == NULL)
continue;
if ((cam_devices[i]->path_id == bus) &&
(cam_devices[i]->target_id == unit) &&
(cam_devices[i]->target_lun == lun))
return (i);
}
return (-1);
}
EXPORT
int scsi_isatapi()
{
return (FALSE);
}
EXPORT
int scsireset()
{
/* XXX synchronous reset command - is this wise? */
return (-1);
}
LOCAL int
scsi_send(int unit, struct scg_cmd *sp)
{
struct cam_device *dev;
union ccb ccb_space;
union ccb *ccb = &ccb_space;
int rv, result;
u_int32_t ccb_flags;
if (unit < 0) {
#if 0
fprintf(stderr, "attempt to reference invalid unit %d\n", unit);
#endif
sp->error = SCG_FATAL;
return (0);
}
dev = cam_devices[unit];
fillbytes(&ccb->ccb_h, sizeof(struct ccb_hdr), '\0');
ccb->ccb_h.path_id = dev->path_id;
ccb->ccb_h.target_id = dev->target_id;
ccb->ccb_h.target_lun = dev->target_lun;
/* Build the CCB */
fillbytes(&(&ccb->ccb_h)[1], sizeof(struct ccb_scsiio), '\0');
movebytes(sp->cdb.cmd_cdb, &ccb->csio.cdb_io.cdb_bytes, sp->cdb_len);
/*
* Set the data direction flags.
*/
if (sp->size != 0) {
ccb_flags = (sp->flags & SCG_RECV_DATA) ? CAM_DIR_IN :
CAM_DIR_OUT;
} else {
ccb_flags = CAM_DIR_NONE;
}
ccb_flags |= CAM_DEV_QFRZDIS;
/*
* If you don't want to bother with sending tagged commands under CAM,
* we don't need to do anything to cdrecord. If you want to send
* tagged commands to those devices that support it, we'll need to set
* the tag action valid field like this in scsi_send():
*
* ccb_flags |= CAM_DEV_QFRZDIS | CAM_TAG_ACTION_VALID;
*/
cam_fill_csio(&ccb->csio,
/* retries */ 1,
/* cbfncp */ NULL,
/* flags */ ccb_flags,
/* tag_action */ MSG_SIMPLE_Q_TAG,
/* data_ptr */ (u_int8_t *)sp->addr,
/* dxfer_len */ sp->size,
/* sense_len */ SSD_FULL_SIZE,
/* cdb_len */ sp->cdb_len,
/* timeout */ sp->timeout * 1000);
/* Run the command */
errno = 0;
if ((rv = cam_send_ccb(dev, ccb)) == -1) {
return (rv);
} else {
/*
* Check for command status. Selection timeouts are fatal.
* For command timeouts, we pass back the appropriate
* error. If we completed successfully, there's (obviously)
* no error. We declare anything else "retryable".
*/
switch(ccb->ccb_h.status & CAM_STATUS_MASK) {
case CAM_SEL_TIMEOUT:
result = SCG_FATAL;
break;
case CAM_CMD_TIMEOUT:
result = SCG_TIMEOUT;
break;
case CAM_REQ_CMP:
result = SCG_NO_ERROR;
break;
default:
result = SCG_RETRYABLE;
break;
}
}
sp->error = result;
if (result != SCG_NO_ERROR)
sp->ux_errno = EIO;
/* Pass the result back up */
fillbytes(&sp->scb, sizeof(sp->scb), '\0');
fillbytes(&sp->u_sense.cmd_sense, sizeof(sp->u_sense.cmd_sense), '\0');
sp->resid = ccb->csio.resid;
sp->sense_count = SSD_FULL_SIZE - ccb->csio.sense_resid;
/*
* Determine how much room we have for sense data.
*/
if (sp->sense_count > SCG_MAX_SENSE)
sp->sense_count = SCG_MAX_SENSE;
/* Copy the sense data out */
movebytes(&ccb->csio.sense_data, &sp->u_sense.cmd_sense, sp->sense_count);
sp->u_scb.cmd_scb[0] = ccb->csio.scsi_status;
return (0);
}
#undef scsi_sense
#undef scsi_inquiry
#define sense u_sense.Sense
#endif /* BSD_CAM */