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29 * @(#)mtio.h 8.1 (Berkeley) 6/2/93
30 * $FreeBSD: stable/7/sys/sys/mtio.h 139825 2005-01-07 02:29:27Z imp $
37 #include <sys/types.h>
39 #include <sys/ioccom.h>
42 * Structures and definitions for mag tape io control commands
45 /* structure for MTIOCTOP - mag tape op command */
47 short mt_op; /* operations defined below */
48 int32_t mt_count; /* how many of them */
52 #define MTWEOF 0 /* write an end-of-file record */
53 #define MTFSF 1 /* forward space file */
54 #define MTBSF 2 /* backward space file */
55 #define MTFSR 3 /* forward space record */
56 #define MTBSR 4 /* backward space record */
57 #define MTREW 5 /* rewind */
58 #define MTOFFL 6 /* rewind and put the drive offline */
59 #define MTNOP 7 /* no operation, sets status only */
60 #define MTCACHE 8 /* enable controller cache */
61 #define MTNOCACHE 9 /* disable controller cache */
63 #if defined(__FreeBSD__)
64 /* Set block size for device. If device is a variable size dev */
65 /* a non zero parameter will change the device to a fixed block size */
66 /* device with block size set to that of the parameter passed in. */
67 /* Resetting the block size to 0 will restore the device to a variable */
68 /* block size device. */
72 /* Set density values for device. Sets the value for the opened mode only. */
76 #define MTERASE 12 /* erase to EOM */
77 #define MTEOD 13 /* Space to EOM */
78 #define MTCOMP 14 /* select compression mode 0=off, 1=def */
79 #define MTRETENS 15 /* re-tension tape */
80 #define MTWSS 16 /* write setmark(s) */
81 #define MTFSS 17 /* forward space setmark */
82 #define MTBSS 18 /* backward space setmark */
84 #define MT_COMP_ENABLE 0xffffffff
85 #define MT_COMP_DISABLED 0xfffffffe
86 #define MT_COMP_UNSUPP 0xfffffffd
89 * Values in mt_dsreg that say what the device is doing
91 #define MTIO_DSREG_NIL 0 /* Unknown */
92 #define MTIO_DSREG_REST 1 /* Doing Nothing */
93 #define MTIO_DSREG_RBSY 2 /* Communicating with tape (but no motion) */
94 #define MTIO_DSREG_WR 20 /* Writing */
95 #define MTIO_DSREG_FMK 21 /* Writing Filemarks */
96 #define MTIO_DSREG_ZER 22 /* Erasing */
97 #define MTIO_DSREG_RD 30 /* Reading */
98 #define MTIO_DSREG_FWD 40 /* Spacing Forward */
99 #define MTIO_DSREG_REV 41 /* Spacing Reverse */
100 #define MTIO_DSREG_POS 42 /* Hardware Positioning (direction unknown) */
101 #define MTIO_DSREG_REW 43 /* Rewinding */
102 #define MTIO_DSREG_TEN 44 /* Retensioning */
103 #define MTIO_DSREG_UNL 45 /* Unloading */
104 #define MTIO_DSREG_LD 46 /* Loading */
106 #endif /* __FreeBSD__ */
108 /* structure for MTIOCGET - mag tape get status command */
111 short mt_type; /* type of magtape device */
112 /* the following two registers are grossly device dependent */
113 short mt_dsreg; /* ``drive status'' register */
114 short mt_erreg; /* ``error'' register */
115 /* end device-dependent registers */
117 * Note that the residual count, while maintained, may be
118 * be nonsense because the size of the residual may (greatly)
119 * exceed 32 K-bytes. Use the MTIOCERRSTAT ioctl to get a
120 * more accurate count.
122 short mt_resid; /* residual count */
123 #if defined (__FreeBSD__)
124 int32_t mt_blksiz; /* presently operating blocksize */
125 int32_t mt_density; /* presently operating density */
126 u_int32_t mt_comp; /* presently operating compression */
127 int32_t mt_blksiz0; /* blocksize for mode 0 */
128 int32_t mt_blksiz1; /* blocksize for mode 1 */
129 int32_t mt_blksiz2; /* blocksize for mode 2 */
130 int32_t mt_blksiz3; /* blocksize for mode 3 */
131 int32_t mt_density0; /* density for mode 0 */
132 int32_t mt_density1; /* density for mode 1 */
133 int32_t mt_density2; /* density for mode 2 */
134 int32_t mt_density3; /* density for mode 3 */
135 /* the following are not yet implemented */
136 u_int32_t mt_comp0; /* compression type for mode 0 */
137 u_int32_t mt_comp1; /* compression type for mode 1 */
138 u_int32_t mt_comp2; /* compression type for mode 2 */
139 u_int32_t mt_comp3; /* compression type for mode 3 */
140 /* end not yet implemented */
142 int32_t mt_fileno; /* relative file number of current position */
143 int32_t mt_blkno; /* relative block number of current position */
146 /* structure for MTIOCERRSTAT - tape get error status command */
147 /* really only supported for SCSI tapes right now */
148 struct scsi_tape_errors {
150 * These are latched from the last command that had a SCSI
151 * Check Condition noted for these operations. The act
152 * of issuing an MTIOCERRSTAT unlatches and clears them.
154 u_int8_t io_sense[32]; /* Last Sense Data For Data I/O */
155 int32_t io_resid; /* residual count from last Data I/O */
156 u_int8_t io_cdb[16]; /* Command that Caused the Last Data Sense */
157 u_int8_t ctl_sense[32]; /* Last Sense Data For Control I/O */
158 int32_t ctl_resid; /* residual count from last Control I/O */
159 u_int8_t ctl_cdb[16]; /* Command that Caused the Last Control Sense */
161 * These are the read and write cumulative error counters.
162 * (how to reset cumulative error counters is not yet defined).
163 * (not implemented as yet but space is being reserved for them)
166 u_int32_t retries; /* total # retries performed */
167 u_int32_t corrected; /* total # corrections performed */
168 u_int32_t processed; /* total # corrections successful */
169 u_int32_t failures; /* total # corrections/retries failed */
170 u_int64_t nbytes; /* total # bytes processed */
175 struct scsi_tape_errors scsi_errstat;
176 char _reserved_padding[256];
180 * Constants for mt_type byte. These are the same
181 * for controllers compatible with the types listed.
183 #define MT_ISTS 0x01 /* TS-11 */
184 #define MT_ISHT 0x02 /* TM03 Massbus: TE16, TU45, TU77 */
185 #define MT_ISTM 0x03 /* TM11/TE10 Unibus */
186 #define MT_ISMT 0x04 /* TM78/TU78 Massbus */
187 #define MT_ISUT 0x05 /* SI TU-45 emulation on Unibus */
188 #define MT_ISCPC 0x06 /* SUN */
189 #define MT_ISAR 0x07 /* SUN */
190 #define MT_ISTMSCP 0x08 /* DEC TMSCP protocol (TU81, TK50) */
191 #define MT_ISCY 0x09 /* CCI Cipher */
192 #define MT_ISCT 0x0a /* HP 1/4 tape */
193 #define MT_ISFHP 0x0b /* HP 7980 1/2 tape */
194 #define MT_ISEXABYTE 0x0c /* Exabyte */
195 #define MT_ISEXA8200 0x0c /* Exabyte EXB-8200 */
196 #define MT_ISEXA8500 0x0d /* Exabyte EXB-8500 */
197 #define MT_ISVIPER1 0x0e /* Archive Viper-150 */
198 #define MT_ISPYTHON 0x0f /* Archive Python (DAT) */
199 #define MT_ISHPDAT 0x10 /* HP 35450A DAT drive */
200 #define MT_ISMFOUR 0x11 /* M4 Data 1/2 9track drive */
201 #define MT_ISTK50 0x12 /* DEC SCSI TK50 */
202 #define MT_ISMT02 0x13 /* Emulex MT02 SCSI tape controller */
204 /* mag tape io control commands */
205 #define MTIOCTOP _IOW('m', 1, struct mtop) /* do a mag tape op */
206 #define MTIOCGET _IOR('m', 2, struct mtget) /* get tape status */
207 /* these two do not appear to be used anywhere */
208 #define MTIOCIEOT _IO('m', 3) /* ignore EOT error */
209 #define MTIOCEEOT _IO('m', 4) /* enable EOT error */
211 * When more SCSI-3 SSC (streaming device) devices are out there
212 * that support the full 32 byte type 2 structure, we'll have to
213 * rethink these ioctls to support all the entities they haul into
214 * the picture (64 bit blocks, logical file record numbers, etc..).
216 #define MTIOCRDSPOS _IOR('m', 5, u_int32_t) /* get logical blk addr */
217 #define MTIOCRDHPOS _IOR('m', 6, u_int32_t) /* get hardware blk addr */
218 #define MTIOCSLOCATE _IOW('m', 5, u_int32_t) /* seek to logical blk addr */
219 #define MTIOCHLOCATE _IOW('m', 6, u_int32_t) /* seek to hardware blk addr */
220 #define MTIOCERRSTAT _IOR('m', 7, union mterrstat) /* get tape errors */
222 * Set EOT model- argument is number of filemarks to end a tape with.
223 * Note that not all possible values will be accepted.
225 #define MTIOCSETEOTMODEL _IOW('m', 8, u_int32_t)
226 /* Get current EOT model */
227 #define MTIOCGETEOTMODEL _IOR('m', 8, u_int32_t)
230 #define DEFTAPE "/dev/nsa0"
233 #endif /* !_SYS_MTIO_H_ */