1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  * linux/mtio.h header file for Linux. Written by H. Bergman
4  *
5  * Modified for special ioctls provided by zftape in September 1997
6  * by C.-J. Heine.
7  */
8 
9 #ifndef _LINUX_MTIO_H
10 #define _LINUX_MTIO_H
11 
12 #include <linux/types.h>
13 #include <linux/ioctl.h>
14 
15 /*
16  * Structures and definitions for mag tape io control commands
17  */
18 
19 /* structure for MTIOCTOP - mag tape op command */
20 struct	mtop {
21 	short	mt_op;		/* operations defined below */
22 	int	mt_count;	/* how many of them */
23 };
24 
25 /* Magnetic Tape operations [Not all operations supported by all drivers]: */
26 #define MTRESET 0	/* +reset drive in case of problems */
27 #define MTFSF	1	/* forward space over FileMark,
28 			 * position at first record of next file
29 			 */
30 #define MTBSF	2	/* backward space FileMark (position before FM) */
31 #define MTFSR	3	/* forward space record */
32 #define MTBSR	4	/* backward space record */
33 #define MTWEOF	5	/* write an end-of-file record (mark) */
34 #define MTREW	6	/* rewind */
35 #define MTOFFL	7	/* rewind and put the drive offline (eject?) */
36 #define MTNOP	8	/* no op, set status only (read with MTIOCGET) */
37 #define MTRETEN 9	/* retension tape */
38 #define MTBSFM	10	/* +backward space FileMark, position at FM */
39 #define MTFSFM  11	/* +forward space FileMark, position at FM */
40 #define MTEOM	12	/* goto end of recorded media (for appending files).
41 			 * MTEOM positions after the last FM, ready for
42 			 * appending another file.
43 			 */
44 #define MTERASE 13	/* erase tape -- be careful! */
45 
46 #define MTRAS1  14	/* run self test 1 (nondestructive) */
47 #define MTRAS2	15	/* run self test 2 (destructive) */
48 #define MTRAS3  16	/* reserved for self test 3 */
49 
50 #define MTSETBLK 20	/* set block length (SCSI) */
51 #define MTSETDENSITY 21	/* set tape density (SCSI) */
52 #define MTSEEK	22	/* seek to block (Tandberg, etc.) */
53 #define MTTELL	23	/* tell block (Tandberg, etc.) */
54 #define MTSETDRVBUFFER 24 /* set the drive buffering according to SCSI-2 */
55 			/* ordinary buffered operation with code 1 */
56 #define MTFSS	25	/* space forward over setmarks */
57 #define MTBSS	26	/* space backward over setmarks */
58 #define MTWSM	27	/* write setmarks */
59 
60 #define MTLOCK  28	/* lock the drive door */
61 #define MTUNLOCK 29	/* unlock the drive door */
62 #define MTLOAD  30	/* execute the SCSI load command */
63 #define MTUNLOAD 31	/* execute the SCSI unload command */
64 #define MTCOMPRESSION 32/* control compression with SCSI mode page 15 */
65 #define MTSETPART 33	/* Change the active tape partition */
66 #define MTMKPART  34	/* Format the tape with one or two partitions */
67 #define MTWEOFI	35	/* write an end-of-file record (mark) in immediate mode */
68 
69 /* structure for MTIOCGET - mag tape get status command */
70 
71 struct	mtget {
72 	long	mt_type;	/* type of magtape device */
73 	long	mt_resid;	/* residual count: (not sure)
74 				 *	number of bytes ignored, or
75 				 *	number of files not skipped, or
76 				 *	number of records not skipped.
77 				 */
78 	/* the following registers are device dependent */
79 	long	mt_dsreg;	/* status register */
80 	long	mt_gstat;	/* generic (device independent) status */
81 	long	mt_erreg;	/* error register */
82 	/* The next two fields are not always used */
83 	__kernel_daddr_t mt_fileno;	/* number of current file on tape */
84 	__kernel_daddr_t mt_blkno;	/* current block number */
85 };
86 
87 
88 
89 /*
90  * Constants for mt_type. Not all of these are supported,
91  * and these are not all of the ones that are supported.
92  */
93 #define MT_ISUNKNOWN		0x01
94 #define MT_ISQIC02		0x02	/* Generic QIC-02 tape streamer */
95 #define MT_ISWT5150		0x03	/* Wangtek 5150EQ, QIC-150, QIC-02 */
96 #define MT_ISARCHIVE_5945L2	0x04	/* Archive 5945L-2, QIC-24, QIC-02? */
97 #define MT_ISCMSJ500		0x05	/* CMS Jumbo 500 (QIC-02?) */
98 #define MT_ISTDC3610		0x06	/* Tandberg 6310, QIC-24 */
99 #define MT_ISARCHIVE_VP60I	0x07	/* Archive VP60i, QIC-02 */
100 #define MT_ISARCHIVE_2150L	0x08	/* Archive Viper 2150L */
101 #define MT_ISARCHIVE_2060L	0x09	/* Archive Viper 2060L */
102 #define MT_ISARCHIVESC499	0x0A	/* Archive SC-499 QIC-36 controller */
103 #define MT_ISQIC02_ALL_FEATURES	0x0F	/* Generic QIC-02 with all features */
104 #define MT_ISWT5099EEN24	0x11	/* Wangtek 5099-een24, 60MB, QIC-24 */
105 #define MT_ISTEAC_MT2ST		0x12	/* Teac MT-2ST 155mb drive, Teac DC-1 card (Wangtek type) */
106 #define MT_ISEVEREX_FT40A	0x32	/* Everex FT40A (QIC-40) */
107 #define MT_ISDDS1		0x51	/* DDS device without partitions */
108 #define MT_ISDDS2		0x52	/* DDS device with partitions */
109 #define MT_ISONSTREAM_SC        0x61   /* OnStream SCSI tape drives (SC-x0)
110 					  and SCSI emulated (DI, DP, USB) */
111 #define MT_ISSCSI1		0x71	/* Generic ANSI SCSI-1 tape unit */
112 #define MT_ISSCSI2		0x72	/* Generic ANSI SCSI-2 tape unit */
113 
114 /* QIC-40/80/3010/3020 ftape supported drives.
115  * 20bit vendor ID + 0x800000 (see ftape-vendors.h)
116  */
117 #define MT_ISFTAPE_UNKNOWN	0x800000 /* obsolete */
118 #define MT_ISFTAPE_FLAG	0x800000
119 
120 
121 /* structure for MTIOCPOS - mag tape get position command */
122 
123 struct	mtpos {
124 	long 	mt_blkno;	/* current block number */
125 };
126 
127 
128 /* mag tape io control commands */
129 #define	MTIOCTOP	_IOW('m', 1, struct mtop)	/* do a mag tape op */
130 #define	MTIOCGET	_IOR('m', 2, struct mtget)	/* get tape status */
131 #define	MTIOCPOS	_IOR('m', 3, struct mtpos)	/* get tape position */
132 
133 
134 /* Generic Mag Tape (device independent) status macros for examining
135  * mt_gstat -- HP-UX compatible.
136  * There is room for more generic status bits here, but I don't
137  * know which of them are reserved. At least three or so should
138  * be added to make this really useful.
139  */
140 #define GMT_EOF(x)              ((x) & 0x80000000)
141 #define GMT_BOT(x)              ((x) & 0x40000000)
142 #define GMT_EOT(x)              ((x) & 0x20000000)
143 #define GMT_SM(x)               ((x) & 0x10000000)  /* DDS setmark */
144 #define GMT_EOD(x)              ((x) & 0x08000000)  /* DDS EOD */
145 #define GMT_WR_PROT(x)          ((x) & 0x04000000)
146 /* #define GMT_ ? 		((x) & 0x02000000) */
147 #define GMT_ONLINE(x)           ((x) & 0x01000000)
148 #define GMT_D_6250(x)           ((x) & 0x00800000)
149 #define GMT_D_1600(x)           ((x) & 0x00400000)
150 #define GMT_D_800(x)            ((x) & 0x00200000)
151 /* #define GMT_ ? 		((x) & 0x00100000) */
152 /* #define GMT_ ? 		((x) & 0x00080000) */
153 #define GMT_DR_OPEN(x)          ((x) & 0x00040000)  /* door open (no tape) */
154 /* #define GMT_ ? 		((x) & 0x00020000) */
155 #define GMT_IM_REP_EN(x)        ((x) & 0x00010000)  /* immediate report mode */
156 #define GMT_CLN(x)              ((x) & 0x00008000)  /* cleaning requested */
157 /* 15 generic status bits unused */
158 
159 
160 /* SCSI-tape specific definitions */
161 /* Bitfield shifts in the status  */
162 #define MT_ST_BLKSIZE_SHIFT	0
163 #define MT_ST_BLKSIZE_MASK	0xffffff
164 #define MT_ST_DENSITY_SHIFT	24
165 #define MT_ST_DENSITY_MASK	0xff000000
166 
167 #define MT_ST_SOFTERR_SHIFT	0
168 #define MT_ST_SOFTERR_MASK	0xffff
169 
170 /* Bitfields for the MTSETDRVBUFFER ioctl */
171 #define MT_ST_OPTIONS		0xf0000000
172 #define MT_ST_BOOLEANS		0x10000000
173 #define MT_ST_SETBOOLEANS	0x30000000
174 #define MT_ST_CLEARBOOLEANS	0x40000000
175 #define MT_ST_WRITE_THRESHOLD	0x20000000
176 #define MT_ST_DEF_BLKSIZE	0x50000000
177 #define MT_ST_DEF_OPTIONS	0x60000000
178 #define MT_ST_TIMEOUTS		0x70000000
179 #define MT_ST_SET_TIMEOUT	(MT_ST_TIMEOUTS | 0x000000)
180 #define MT_ST_SET_LONG_TIMEOUT	(MT_ST_TIMEOUTS | 0x100000)
181 #define MT_ST_SET_CLN		0x80000000
182 
183 #define MT_ST_BUFFER_WRITES	0x1
184 #define MT_ST_ASYNC_WRITES	0x2
185 #define MT_ST_READ_AHEAD	0x4
186 #define MT_ST_DEBUGGING		0x8
187 #define MT_ST_TWO_FM		0x10
188 #define MT_ST_FAST_MTEOM	0x20
189 #define MT_ST_AUTO_LOCK		0x40
190 #define MT_ST_DEF_WRITES	0x80
191 #define MT_ST_CAN_BSR		0x100
192 #define MT_ST_NO_BLKLIMS	0x200
193 #define MT_ST_CAN_PARTITIONS    0x400
194 #define MT_ST_SCSI2LOGICAL      0x800
195 #define MT_ST_SYSV              0x1000
196 #define MT_ST_NOWAIT            0x2000
197 #define MT_ST_SILI		0x4000
198 #define MT_ST_NOWAIT_EOF	0x8000
199 
200 /* The mode parameters to be controlled. Parameter chosen with bits 20-28 */
201 #define MT_ST_CLEAR_DEFAULT	0xfffff
202 #define MT_ST_DEF_DENSITY	(MT_ST_DEF_OPTIONS | 0x100000)
203 #define MT_ST_DEF_COMPRESSION	(MT_ST_DEF_OPTIONS | 0x200000)
204 #define MT_ST_DEF_DRVBUFFER	(MT_ST_DEF_OPTIONS | 0x300000)
205 
206 /* The offset for the arguments for the special HP changer load command. */
207 #define MT_ST_HPLOADER_OFFSET 10000
208 
209 #endif /* _LINUX_MTIO_H */
210