80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/*
|
|
* Disk Array driver for HP Smart Array controllers, SCSI Tape module.
|
|
* (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P.
|
|
*
|
|
* 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; version 2 of the License.
|
|
*
|
|
* 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; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA
|
|
* 02111-1307, USA.
|
|
*
|
|
* Questions/Comments/Bugfixes to iss_storagedev@hp.com
|
|
*
|
|
*/
|
|
#ifdef CONFIG_CISS_SCSI_TAPE
|
|
#ifndef _CCISS_SCSI_H_
|
|
#define _CCISS_SCSI_H_
|
|
|
|
#include <scsi/scsicam.h> /* possibly irrelevant, since we don't show disks */
|
|
|
|
/* the scsi id of the adapter... */
|
|
#define SELF_SCSI_ID 15
|
|
/* 15 is somewhat arbitrary, since the scsi-2 bus
|
|
that's presented by the driver to the OS is
|
|
fabricated. The "real" scsi-3 bus the
|
|
hardware presents is fabricated too.
|
|
The actual, honest-to-goodness physical
|
|
bus that the devices are attached to is not
|
|
addressible natively, and may in fact turn
|
|
out to be not scsi at all. */
|
|
|
|
|
|
/*
|
|
|
|
If the upper scsi layer tries to track how many commands we have
|
|
outstanding, it will be operating under the misapprehension that it is
|
|
the only one sending us requests. We also have the block interface,
|
|
which is where most requests must surely come from, so the upper layer's
|
|
notion of how many requests we have outstanding will be wrong most or
|
|
all of the time.
|
|
|
|
Note, the normal SCSI mid-layer error handling doesn't work well
|
|
for this driver because 1) it takes the io_request_lock before
|
|
calling error handlers and uses a local variable to store flags,
|
|
so the io_request_lock cannot be released and interrupts enabled
|
|
inside the error handlers, and, the error handlers cannot poll
|
|
for command completion because they might get commands from the
|
|
block half of the driver completing, and not know what to do
|
|
with them. That's what we get for making a hybrid scsi/block
|
|
driver, I suppose.
|
|
|
|
*/
|
|
|
|
struct cciss_scsi_dev_t {
|
|
int devtype;
|
|
int bus, target, lun; /* as presented to the OS */
|
|
unsigned char scsi3addr[8]; /* as presented to the HW */
|
|
unsigned char device_id[16]; /* from inquiry pg. 0x83 */
|
|
unsigned char vendor[8]; /* bytes 8-15 of inquiry data */
|
|
unsigned char model[16]; /* bytes 16-31 of inquiry data */
|
|
unsigned char revision[4]; /* bytes 32-35 of inquiry data */
|
|
};
|
|
|
|
struct cciss_scsi_hba_t {
|
|
char *name;
|
|
int ndevices;
|
|
#define CCISS_MAX_SCSI_DEVS_PER_HBA 16
|
|
struct cciss_scsi_dev_t dev[CCISS_MAX_SCSI_DEVS_PER_HBA];
|
|
};
|
|
|
|
#endif /* _CCISS_SCSI_H_ */
|
|
#endif /* CONFIG_CISS_SCSI_TAPE */
|