English
- #ifndef _ST_H
- #define _ST_H
- #ifndef _SCSI_H
- #include "scsi.h"
- #endif
- #include <linux/devfs_fs_kernel.h>
- #include <linux/completion.h>
- /* The tape buffer descriptor. */
- typedef struct {
- unsigned char in_use;
- unsigned char dma; /* DMA-able buffer */
- int buffer_size;
- int buffer_blocks;
- int buffer_bytes;
- int read_pointer;
- int writing;
- int midlevel_result;
- int syscall_result;
- Scsi_Request *last_SRpnt;
- unsigned char *b_data;
- unsigned short use_sg; /* zero or number of segments for this adapter */
- unsigned short sg_segs; /* total number of allocated segments */
- unsigned short orig_sg_segs; /* number of segments allocated at first try */
- struct scatterlist sg[1]; /* MUST BE last item */
- } ST_buffer;
- /* The tape mode definition */
- typedef struct {
- unsigned char defined;
- unsigned char sysv; /* SYS V semantics? */
- unsigned char do_async_writes;
- unsigned char do_buffer_writes;
- unsigned char do_read_ahead;
- unsigned char defaults_for_writes;
- unsigned char default_compression; /* 0 = don't touch, etc */
- short default_density; /* Forced density, -1 = no value */
- int default_blksize; /* Forced blocksize, -1 = no value */
- } ST_mode;
- #define ST_NBR_MODE_BITS 2
- #define ST_NBR_MODES (1 << ST_NBR_MODE_BITS)
- #define ST_MODE_SHIFT (7 - ST_NBR_MODE_BITS)
- #define ST_MODE_MASK ((ST_NBR_MODES - 1) << ST_MODE_SHIFT)
- #define ST_MAX_TAPES (1 << ST_MODE_SHIFT)
- /* The status related to each partition */
- typedef struct {
- unsigned char rw;
- unsigned char eof;
- unsigned char at_sm;
- unsigned char last_block_valid;
- u32 last_block_visited;
- int drv_block; /* The block where the drive head is */
- int drv_file;
- } ST_partstat;
- #define ST_NBR_PARTITIONS 4
- /* The tape drive descriptor */
- typedef struct {
- kdev_t devt;
- Scsi_Device *device;
- struct semaphore lock; /* For serialization */
- struct completion wait; /* For SCSI commands */
- ST_buffer *buffer;
- /* Drive characteristics */
- unsigned char omit_blklims;
- unsigned char do_auto_lock;
- unsigned char can_bsr;
- unsigned char can_partitions;
- unsigned char two_fm;
- unsigned char fast_mteom;
- unsigned char immediate;
- unsigned char restr_dma;
- unsigned char scsi2_logical;
- unsigned char default_drvbuffer; /* 0xff = don't touch, value 3 bits */
- unsigned char cln_mode; /* 0 = none, otherwise sense byte nbr */
- unsigned char cln_sense_value;
- unsigned char cln_sense_mask;
- unsigned char use_pf; /* Set Page Format bit in all mode selects? */
- unsigned char c_algo; /* compression algorithm */
- int tape_type;
- int write_threshold;
- int timeout; /* timeout for normal commands */
- int long_timeout; /* timeout for commands known to take long time */
- /* Mode characteristics */
- ST_mode modes[ST_NBR_MODES];
- int current_mode;
- devfs_handle_t de_r[ST_NBR_MODES]; /* Rewind entries */
- devfs_handle_t de_n[ST_NBR_MODES]; /* No-rewind entries */
- /* Status variables */
- int partition;
- int new_partition;
- int nbr_partitions; /* zero until partition support enabled */
- ST_partstat ps[ST_NBR_PARTITIONS];
- unsigned char dirty;
- unsigned char ready;
- unsigned char write_prot;
- unsigned char drv_write_prot;
- unsigned char in_use;
- unsigned char blksize_changed;
- unsigned char density_changed;
- unsigned char compression_changed;
- unsigned char drv_buffer;
- unsigned char density;
- unsigned char door_locked;
- unsigned char autorew_dev; /* auto-rewind device */
- unsigned char rew_at_close; /* rewind necessary at close */
- unsigned char inited;
- unsigned char cleaning_req; /* cleaning requested? */
- int block_size;
- int min_block;
- int max_block;
- int recover_count; /* From tape opening */
- int recover_reg; /* From last status call */
- #if DEBUG
- unsigned char write_pending;
- int nbr_finished;
- int nbr_waits;
- unsigned char last_cmnd[6];
- unsigned char last_sense[16];
- #endif
- } Scsi_Tape;
- /* Bit masks for use_pf */
- #define USE_PF 1
- #define PF_TESTED 2
- /* Values of eof */
- #define ST_NOEOF 0
- #define ST_FM_HIT 1
- #define ST_FM 2
- #define ST_EOM_OK 3
- #define ST_EOM_ERROR 4
- #define ST_EOD_1 5
- #define ST_EOD_2 6
- #define ST_EOD 7
- /* EOD hit while reading => ST_EOD_1 => return zero => ST_EOD_2 =>
- return zero => ST_EOD, return ENOSPC */
- /* Values of rw */
- #define ST_IDLE 0
- #define ST_READING 1
- #define ST_WRITING 2
- /* Values of ready state */
- #define ST_READY 0
- #define ST_NOT_READY 1
- #define ST_NO_TAPE 2
- /* Values for door lock state */
- #define ST_UNLOCKED 0
- #define ST_LOCKED_EXPLICIT 1
- #define ST_LOCKED_AUTO 2
- #define ST_LOCK_FAILS 3
- /* Positioning SCSI-commands for Tandberg, etc. drives */
- #define QFA_REQUEST_BLOCK 0x02
- #define QFA_SEEK_BLOCK 0x0c
- /* Setting the binary options */
- #define ST_DONT_TOUCH 0
- #define ST_NO 1
- #define ST_YES 2
- #define EXTENDED_SENSE_START 18
- #endif
