5 #include <linux/completion.h>
6 #include <linux/mutex.h>
7 #include <linux/kref.h>
8 #include <scsi/scsi_cmnd.h>
10 /* Descriptor for analyzed sense data */
13 struct scsi_sense_hdr sense_hdr
;
25 /* scsi tape command */
27 unsigned char cmd
[MAX_COMMAND_SIZE
];
28 unsigned char sense
[SCSI_SENSE_BUFFERSIZE
];
30 struct scsi_tape
*stp
;
31 struct completion
*waiting
;
35 /* The tape buffer descriptor. */
37 unsigned char dma
; /* DMA-able buffer */
38 unsigned char do_dio
; /* direct i/o set up? */
39 unsigned char cleared
; /* internal buffer cleared after open? */
46 struct st_request
*last_SRpnt
;
47 struct st_cmdstatus cmdstat
;
48 struct page
**reserved_pages
;
49 struct page
**mapped_pages
;
50 struct rq_map_data map_data
;
51 unsigned char *b_data
;
52 unsigned short use_sg
; /* zero or max number of s/g segments for this adapter */
53 unsigned short sg_segs
; /* number of segments in s/g list */
54 unsigned short frp_segs
; /* number of buffer segments */
57 /* The tape mode definition */
59 unsigned char defined
;
60 unsigned char sysv
; /* SYS V semantics? */
61 unsigned char do_async_writes
;
62 unsigned char do_buffer_writes
;
63 unsigned char do_read_ahead
;
64 unsigned char defaults_for_writes
;
65 unsigned char default_compression
; /* 0 = don't touch, etc */
66 short default_density
; /* Forced density, -1 = no value */
67 int default_blksize
; /* Forced blocksize, -1 = no value */
68 struct cdev
*cdevs
[2]; /* Auto-rewind and non-rewind devices */
71 /* Number of modes can be changed by changing ST_NBR_MODE_BITS. The maximum
72 number of modes is 16 (ST_NBR_MODE_BITS 4) */
73 #define ST_NBR_MODE_BITS 2
74 #define ST_NBR_MODES (1 << ST_NBR_MODE_BITS)
75 #define ST_MODE_SHIFT (7 - ST_NBR_MODE_BITS)
76 #define ST_MODE_MASK ((ST_NBR_MODES - 1) << ST_MODE_SHIFT)
78 #define ST_MAX_TAPES 128
79 #define ST_MAX_TAPE_ENTRIES (ST_MAX_TAPES << (ST_NBR_MODE_BITS + 1))
81 /* The status related to each partition */
86 unsigned char last_block_valid
;
87 u32 last_block_visited
;
88 int drv_block
; /* The block where the drive head is */
92 #define ST_NBR_PARTITIONS 4
94 /* The tape drive descriptor */
96 struct scsi_driver
*driver
;
97 struct scsi_device
*device
;
98 struct mutex lock
; /* For serialization */
99 struct completion wait
; /* For SCSI commands */
100 struct st_buffer
*buffer
;
102 /* Drive characteristics */
103 unsigned char omit_blklims
;
104 unsigned char do_auto_lock
;
105 unsigned char can_bsr
;
106 unsigned char can_partitions
;
107 unsigned char two_fm
;
108 unsigned char fast_mteom
;
109 unsigned char immediate
;
110 unsigned char restr_dma
;
111 unsigned char scsi2_logical
;
112 unsigned char default_drvbuffer
; /* 0xff = don't touch, value 3 bits */
113 unsigned char cln_mode
; /* 0 = none, otherwise sense byte nbr */
114 unsigned char cln_sense_value
;
115 unsigned char cln_sense_mask
;
116 unsigned char use_pf
; /* Set Page Format bit in all mode selects? */
117 unsigned char try_dio
; /* try direct i/o in general? */
118 unsigned char try_dio_now
; /* try direct i/o before next close? */
119 unsigned char c_algo
; /* compression algorithm */
120 unsigned char pos_unknown
; /* after reset position unknown */
121 unsigned char sili
; /* use SILI when reading in variable b mode */
123 int long_timeout
; /* timeout for commands known to take long time */
125 unsigned long max_pfn
; /* the maximum page number reachable by the HBA */
127 /* Mode characteristics */
128 struct st_modedef modes
[ST_NBR_MODES
];
131 /* Status variables */
134 int nbr_partitions
; /* zero until partition support enabled */
135 struct st_partstat ps
[ST_NBR_PARTITIONS
];
138 unsigned char write_prot
;
139 unsigned char drv_write_prot
;
140 unsigned char in_use
;
141 unsigned char blksize_changed
;
142 unsigned char density_changed
;
143 unsigned char compression_changed
;
144 unsigned char drv_buffer
;
145 unsigned char density
;
146 unsigned char door_locked
;
147 unsigned char autorew_dev
; /* auto-rewind device */
148 unsigned char rew_at_close
; /* rewind necessary at close */
149 unsigned char inited
;
150 unsigned char cleaning_req
; /* cleaning requested? */
154 int recover_count
; /* From tape opening */
155 int recover_reg
; /* From last status call */
158 unsigned char write_pending
;
164 unsigned char last_cmnd
[6];
165 unsigned char last_sense
[16];
167 struct gendisk
*disk
;
171 /* Bit masks for use_pf */
180 #define ST_EOM_ERROR 4
184 /* EOD hit while reading => ST_EOD_1 => return zero => ST_EOD_2 =>
185 return zero => ST_EOD, return ENOSPC */
186 /* When writing: ST_EOM_OK == early warning found, write OK
187 ST_EOD_1 == allow trying new write after early warning
188 ST_EOM_ERROR == early warning found, not able to write all */
195 /* Values of ready state */
197 #define ST_NOT_READY 1
200 /* Values for door lock state */
201 #define ST_UNLOCKED 0
202 #define ST_LOCKED_EXPLICIT 1
203 #define ST_LOCKED_AUTO 2
204 #define ST_LOCK_FAILS 3
206 /* Positioning SCSI-commands for Tandberg, etc. drives */
207 #define QFA_REQUEST_BLOCK 0x02
208 #define QFA_SEEK_BLOCK 0x0c
210 /* Setting the binary options */
211 #define ST_DONT_TOUCH 0
215 #define EXTENDED_SENSE_START 18
217 /* Masks for some conditions in the sense data */
218 #define SENSE_FMK 0x80
219 #define SENSE_EOM 0x40
220 #define SENSE_ILI 0x20
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