1 /* 2 * Disk Array driver for HP Smart Array controllers, SCSI Tape module. 3 * (C) Copyright 2001, 2007 Hewlett-Packard Development Company, L.P. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 300, Boston, MA 17 * 02111-1307, USA. 18 * 19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com 20 * 21 */ 22 #ifdef CONFIG_CISS_SCSI_TAPE 23 #ifndef _CCISS_SCSI_H_ 24 #define _CCISS_SCSI_H_ 25 26 #include <scsi/scsicam.h> /* possibly irrelevant, since we don't show disks */ 27 28 /* the scsi id of the adapter... */ 29 #define SELF_SCSI_ID 15 30 /* 15 is somewhat arbitrary, since the scsi-2 bus 31 that's presented by the driver to the OS is 32 fabricated. The "real" scsi-3 bus the 33 hardware presents is fabricated too. 34 The actual, honest-to-goodness physical 35 bus that the devices are attached to is not 36 addressible natively, and may in fact turn 37 out to be not scsi at all. */ 38 39 40 /* 41 42 If the upper scsi layer tries to track how many commands we have 43 outstanding, it will be operating under the misapprehension that it is 44 the only one sending us requests. We also have the block interface, 45 which is where most requests must surely come from, so the upper layer's 46 notion of how many requests we have outstanding will be wrong most or 47 all of the time. 48 49 Note, the normal SCSI mid-layer error handling doesn't work well 50 for this driver because 1) it takes the io_request_lock before 51 calling error handlers and uses a local variable to store flags, 52 so the io_request_lock cannot be released and interrupts enabled 53 inside the error handlers, and, the error handlers cannot poll 54 for command completion because they might get commands from the 55 block half of the driver completing, and not know what to do 56 with them. That's what we get for making a hybrid scsi/block 57 driver, I suppose. 58 59 */ 60 61 struct cciss_scsi_dev_t { 62 int devtype; 63 int bus, target, lun; /* as presented to the OS */ 64 unsigned char scsi3addr[8]; /* as presented to the HW */ 65 unsigned char device_id[16]; /* from inquiry pg. 0x83 */ 66 unsigned char vendor[8]; /* bytes 8-15 of inquiry data */ 67 unsigned char model[16]; /* bytes 16-31 of inquiry data */ 68 unsigned char revision[4]; /* bytes 32-35 of inquiry data */ 69 }; 70 71 struct cciss_scsi_hba_t { 72 char *name; 73 int ndevices; 74 #define CCISS_MAX_SCSI_DEVS_PER_HBA 16 75 struct cciss_scsi_dev_t dev[CCISS_MAX_SCSI_DEVS_PER_HBA]; 76 }; 77 78 #endif /* _CCISS_SCSI_H_ */ 79 #endif /* CONFIG_CISS_SCSI_TAPE */ 80