Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
212
drivers/scsi/st.h
Normal file
212
drivers/scsi/st.h
Normal file
@@ -0,0 +1,212 @@
|
||||
|
||||
#ifndef _ST_H
|
||||
#define _ST_H
|
||||
|
||||
#include <linux/completion.h>
|
||||
|
||||
|
||||
/* Descriptor for analyzed sense data */
|
||||
struct st_cmdstatus {
|
||||
int midlevel_result;
|
||||
struct scsi_sense_hdr sense_hdr;
|
||||
int have_sense;
|
||||
u64 uremainder64;
|
||||
u8 flags;
|
||||
u8 remainder_valid;
|
||||
u8 fixed_format;
|
||||
u8 deferred;
|
||||
};
|
||||
|
||||
/* The tape buffer descriptor. */
|
||||
struct st_buffer {
|
||||
unsigned char in_use;
|
||||
unsigned char dma; /* DMA-able buffer */
|
||||
unsigned char do_dio; /* direct i/o set up? */
|
||||
int buffer_size;
|
||||
int buffer_blocks;
|
||||
int buffer_bytes;
|
||||
int read_pointer;
|
||||
int writing;
|
||||
int syscall_result;
|
||||
struct scsi_request *last_SRpnt;
|
||||
struct st_cmdstatus cmdstat;
|
||||
unsigned char *b_data;
|
||||
unsigned short use_sg; /* zero or max number of s/g segments for this adapter */
|
||||
unsigned short sg_segs; /* number of segments in s/g list */
|
||||
unsigned short orig_frp_segs; /* number of segments allocated at first try */
|
||||
unsigned short frp_segs; /* number of buffer segments */
|
||||
unsigned int frp_sg_current; /* driver buffer length currently in s/g list */
|
||||
struct st_buf_fragment *frp; /* the allocated buffer fragment list */
|
||||
struct scatterlist sg[1]; /* MUST BE last item */
|
||||
};
|
||||
|
||||
/* The tape buffer fragment descriptor */
|
||||
struct st_buf_fragment {
|
||||
struct page *page;
|
||||
unsigned int length;
|
||||
};
|
||||
|
||||
/* The tape mode definition */
|
||||
struct st_modedef {
|
||||
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 */
|
||||
struct cdev *cdevs[2]; /* Auto-rewind and non-rewind devices */
|
||||
};
|
||||
|
||||
/* Number of modes can be changed by changing ST_NBR_MODE_BITS. The maximum
|
||||
number of modes is 16 (ST_NBR_MODE_BITS 4) */
|
||||
#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 128
|
||||
#define ST_MAX_TAPE_ENTRIES (ST_MAX_TAPES << (ST_NBR_MODE_BITS + 1))
|
||||
|
||||
/* The status related to each partition */
|
||||
struct st_partstat {
|
||||
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;
|
||||
};
|
||||
|
||||
#define ST_NBR_PARTITIONS 4
|
||||
|
||||
/* The tape drive descriptor */
|
||||
struct scsi_tape {
|
||||
struct scsi_driver *driver;
|
||||
struct scsi_device *device;
|
||||
struct semaphore lock; /* For serialization */
|
||||
struct completion wait; /* For SCSI commands */
|
||||
struct 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 try_dio; /* try direct i/o? */
|
||||
unsigned char c_algo; /* compression algorithm */
|
||||
unsigned char pos_unknown; /* after reset position unknown */
|
||||
int tape_type;
|
||||
int long_timeout; /* timeout for commands known to take long time */
|
||||
|
||||
unsigned long max_pfn; /* the maximum page number reachable by the HBA */
|
||||
|
||||
/* Mode characteristics */
|
||||
struct st_modedef modes[ST_NBR_MODES];
|
||||
int current_mode;
|
||||
|
||||
/* Status variables */
|
||||
int partition;
|
||||
int new_partition;
|
||||
int nbr_partitions; /* zero until partition support enabled */
|
||||
struct 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;
|
||||
int nbr_requests;
|
||||
int nbr_dio;
|
||||
int nbr_pages;
|
||||
int nbr_combinable;
|
||||
unsigned char last_cmnd[6];
|
||||
unsigned char last_sense[16];
|
||||
#endif
|
||||
struct gendisk *disk;
|
||||
};
|
||||
|
||||
/* 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 */
|
||||
/* When writing: ST_EOM_OK == early warning found, write OK
|
||||
ST_EOD_1 == allow trying new write after early warning
|
||||
ST_EOM_ERROR == early warning found, not able to write all */
|
||||
|
||||
/* 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
|
||||
|
||||
/* Masks for some conditions in the sense data */
|
||||
#define SENSE_FMK 0x80
|
||||
#define SENSE_EOM 0x40
|
||||
#define SENSE_ILI 0x20
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user