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mtio.h
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mtio.h
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/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)mtio.h 8.1 (Berkeley) 6/2/93
* $FreeBSD: src/sys/sys/mtio.h,v 1.20.2.2 2001/01/22 18:02:47 mjacob Exp $
* $DragonFly: src/sys/sys/mtio.h,v 1.4 2006/05/20 02:42:13 dillon Exp $
*/
#ifndef _SYS_MTIO_H_
#define _SYS_MTIO_H_
#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif
#ifndef _SYS_IOCCOM_H_
#include <sys/ioccom.h>
#endif
/*
* Structures and definitions for mag tape io control commands
*/
/* structure for MTIOCTOP - mag tape op command */
struct mtop {
short mt_op; /* operations defined below */
daddr_t mt_count; /* how many of them */
};
/* operations */
#define MTWEOF 0 /* write an end-of-file record */
#define MTFSF 1 /* forward space file */
#define MTBSF 2 /* backward space file */
#define MTFSR 3 /* forward space record */
#define MTBSR 4 /* backward space record */
#define MTREW 5 /* rewind */
#define MTOFFL 6 /* rewind and put the drive offline */
#define MTNOP 7 /* no operation, sets status only */
#define MTCACHE 8 /* enable controller cache */
#define MTNOCACHE 9 /* disable controller cache */
#if defined(__DragonFly__)
/* Set block size for device. If device is a variable size dev */
/* a non zero parameter will change the device to a fixed block size */
/* device with block size set to that of the parameter passed in. */
/* Resetting the block size to 0 will restore the device to a variable */
/* block size device. */
#define MTSETBSIZ 10
/* Set density values for device. Sets the value for the opened mode only. */
#define MTSETDNSTY 11
#define MTERASE 12 /* erase to EOM */
#define MTEOD 13 /* Space to EOM */
#define MTCOMP 14 /* select compression mode 0=off, 1=def */
#define MTRETENS 15 /* re-tension tape */
#define MTWSS 16 /* write setmark(s) */
#define MTFSS 17 /* forward space setmark */
#define MTBSS 18 /* backward space setmark */
#define MT_COMP_ENABLE 0xffffffff
#define MT_COMP_DISABLED 0xfffffffe
#define MT_COMP_UNSUPP 0xfffffffd
/*
* Values in mt_dsreg that say what the device is doing
*/
#define MTIO_DSREG_NIL 0 /* Unknown */
#define MTIO_DSREG_REST 1 /* Doing Nothing */
#define MTIO_DSREG_RBSY 2 /* Communicating with tape (but no motion) */
#define MTIO_DSREG_WR 20 /* Writing */
#define MTIO_DSREG_FMK 21 /* Writing Filemarks */
#define MTIO_DSREG_ZER 22 /* Erasing */
#define MTIO_DSREG_RD 30 /* Reading */
#define MTIO_DSREG_FWD 40 /* Spacing Forward */
#define MTIO_DSREG_REV 41 /* Spacing Reverse */
#define MTIO_DSREG_POS 42 /* Hardware Positioning (direction unknown) */
#define MTIO_DSREG_REW 43 /* Rewinding */
#define MTIO_DSREG_TEN 44 /* Retensioning */
#define MTIO_DSREG_UNL 45 /* Unloading */
#define MTIO_DSREG_LD 46 /* Loading */
#endif /* __DragonFly__ */
/* structure for MTIOCGET - mag tape get status command */
struct mtget {
short mt_type; /* type of magtape device */
/* the following two registers are grossly device dependent */
short mt_dsreg; /* ``drive status'' register */
short mt_erreg; /* ``error'' register */
/* end device-dependent registers */
/*
* Note that the residual count, while maintained, may be
* be nonsense because the size of the residual may (greatly)
* exceed 32 K-bytes. Use the MTIOCERRSTAT ioctl to get a
* more accurate count.
*/
short mt_resid; /* residual count */
#if defined (__DragonFly__)
daddr_t mt_blksiz; /* presently operating blocksize */
daddr_t mt_density; /* presently operating density */
u_int32_t mt_comp; /* presently operating compression */
daddr_t mt_blksiz0; /* blocksize for mode 0 */
daddr_t mt_blksiz1; /* blocksize for mode 1 */
daddr_t mt_blksiz2; /* blocksize for mode 2 */
daddr_t mt_blksiz3; /* blocksize for mode 3 */
daddr_t mt_density0; /* density for mode 0 */
daddr_t mt_density1; /* density for mode 1 */
daddr_t mt_density2; /* density for mode 2 */
daddr_t mt_density3; /* density for mode 3 */
/* the following are not yet implemented */
u_int32_t mt_comp0; /* compression type for mode 0 */
u_int32_t mt_comp1; /* compression type for mode 1 */
u_int32_t mt_comp2; /* compression type for mode 2 */
u_int32_t mt_comp3; /* compression type for mode 3 */
/* end not yet implemented */
#endif
daddr_t mt_fileno; /* relative file number of current position */
daddr_t mt_blkno; /* relative block number of current position */
};
/* structure for MTIOCERRSTAT - tape get error status command */
/* really only supported for SCSI tapes right now */
struct scsi_tape_errors {
/*
* These are latched from the last command that had a SCSI
* Check Condition noted for these operations. The act
* of issuing an MTIOCERRSTAT unlatches and clears them.
*/
u_int8_t io_sense[32]; /* Last Sense Data For Data I/O */
int32_t io_resid; /* residual count from last Data I/O */
u_int8_t io_cdb[16]; /* Command that Caused the Last Data Sense */
u_int8_t ctl_sense[32]; /* Last Sense Data For Control I/O */
int32_t ctl_resid; /* residual count from last Control I/O */
u_int8_t ctl_cdb[16]; /* Command that Caused the Last Control Sense */
/*
* These are the read and write cumulative error counters.
* (how to reset cumulative error counters is not yet defined).
* (not implemented as yet but space is being reserved for them)
*/
struct {
u_int32_t retries; /* total # retries performed */
u_int32_t corrected; /* total # corrections performed */
u_int32_t processed; /* total # corrections succssful */
u_int32_t failures; /* total # corrections/retries failed */
u_int64_t nbytes; /* total # bytes processed */
} wterr, rderr;
};
union mterrstat {
struct scsi_tape_errors scsi_errstat;
char _reserved_padding[256];
};
/*
* Constants for mt_type byte. These are the same
* for controllers compatible with the types listed.
*/
#define MT_ISTS 0x01 /* TS-11 */
#define MT_ISHT 0x02 /* TM03 Massbus: TE16, TU45, TU77 */
#define MT_ISTM 0x03 /* TM11/TE10 Unibus */
#define MT_ISMT 0x04 /* TM78/TU78 Massbus */
#define MT_ISUT 0x05 /* SI TU-45 emulation on Unibus */
#define MT_ISCPC 0x06 /* SUN */
#define MT_ISAR 0x07 /* SUN */
#define MT_ISTMSCP 0x08 /* DEC TMSCP protocol (TU81, TK50) */
#define MT_ISCY 0x09 /* CCI Cipher */
#define MT_ISCT 0x0a /* HP 1/4 tape */
#define MT_ISFHP 0x0b /* HP 7980 1/2 tape */
#define MT_ISEXABYTE 0x0c /* Exabyte */
#define MT_ISEXA8200 0x0c /* Exabyte EXB-8200 */
#define MT_ISEXA8500 0x0d /* Exabyte EXB-8500 */
#define MT_ISVIPER1 0x0e /* Archive Viper-150 */
#define MT_ISPYTHON 0x0f /* Archive Python (DAT) */
#define MT_ISHPDAT 0x10 /* HP 35450A DAT drive */
#define MT_ISMFOUR 0x11 /* M4 Data 1/2 9track drive */
#define MT_ISTK50 0x12 /* DEC SCSI TK50 */
#define MT_ISMT02 0x13 /* Emulex MT02 SCSI tape controller */
/* mag tape io control commands */
#define MTIOCTOP _IOW('m', 1, struct mtop) /* do a mag tape op */
#define MTIOCGET _IOR('m', 2, struct mtget) /* get tape status */
/* these two do not appear to be used anywhere */
#define MTIOCIEOT _IO('m', 3) /* ignore EOT error */
#define MTIOCEEOT _IO('m', 4) /* enable EOT error */
/*
* When more SCSI-3 SSC (streaming device) devices are out there
* that support the full 32 byte type 2 structure, we'll have to
* rethink these ioctls to support all the entities they haul into
* the picture (64 bit blocks, logical file record numbers, etc..).
*/
#define MTIOCRDSPOS _IOR('m', 5, u_int32_t) /* get logical blk addr */
#define MTIOCRDHPOS _IOR('m', 6, u_int32_t) /* get hardware blk addr */
#define MTIOCSLOCATE _IOW('m', 5, u_int32_t) /* seek to logical blk addr */
#define MTIOCHLOCATE _IOW('m', 6, u_int32_t) /* seek to hardware blk addr */
#define MTIOCERRSTAT _IOR('m', 7, union mterrstat) /* get tape errors */
/*
* Set EOT model- argument is number of filemarks to end a tape with.
* Note that not all possible values will be accepted.
*/
#define MTIOCSETEOTMODEL _IOW('m', 8, u_int32_t)
/* Get current EOT model */
#define MTIOCGETEOTMODEL _IOR('m', 8, u_int32_t)
#ifndef _KERNEL
#define DEFTAPE "/dev/nsa0"
#endif
#ifdef _KERNEL
/*
* minor device number
*/
#define T_UNIT 003 /* unit selection */
#define T_NOREWIND 004 /* no rewind on close */
#define T_DENSEL 030 /* density select */
#define T_800BPI 000 /* select 800 bpi */
#define T_1600BPI 010 /* select 1600 bpi */
#define T_6250BPI 020 /* select 6250 bpi */
#define T_BADBPI 030 /* undefined selection */
#endif
#endif /* !_SYS_MTIO_H_ */