root/drivers/scsi/st.h

/* */

INCLUDED FROM

   1 
   2 #ifndef _ST_H
   3         #define _ST_H
   4 /*
   5         $Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/st.h,v 1.1 1992/04/24 18:01:50 root Exp root $
   6 */
   7 
   8 #ifndef _SCSI_H
   9 #include "scsi.h"
  10 #endif
  11 
  12 typedef struct {
  13   int in_use;
  14   int buffer_size;
  15   int buffer_blocks;
  16   int buffer_bytes;
  17   int read_pointer;
  18   int writing;
  19   int last_result;
  20   int last_result_fatal;
  21   unsigned char b_data[1];
  22 } ST_buffer;
  23 
  24 typedef struct {
  25   unsigned capacity;
  26   struct wait_queue * waiting;
  27   Scsi_Device* device;
  28   unsigned dirty:1;
  29   unsigned rw:2;
  30   unsigned eof:2;
  31   unsigned write_prot:1;
  32   unsigned in_use:1;
  33   unsigned eof_hit:1;
  34   unsigned drv_buffer:3;
  35   unsigned do_buffer_writes:1;
  36   unsigned do_async_writes:1;
  37   unsigned do_read_ahead:1;
  38   unsigned char density;
  39   ST_buffer * buffer;
  40   int block_size;
  41   int min_block;
  42   int max_block;
  43   int write_threshold;
  44   int recover_count;
  45   int drv_block;        /* The block where the drive head is */
  46   struct mtget * mt_status;
  47   Scsi_Cmnd SCpnt;
  48 } Scsi_Tape;
  49 
  50 /* Values of eof */
  51 #define ST_NOEOF        0
  52 #define ST_FM           1
  53 #define ST_EOM_OK       2
  54 #define ST_EOM_ERROR    3
  55 
  56 /* Values of rw */
  57 #define ST_IDLE         0
  58 #define ST_READING      1
  59 #define ST_WRITING      2
  60 
  61 /* Positioning SCSI-commands for Tandberg, etc. drives */
  62 #define QFA_REQUEST_BLOCK       0x02
  63 #define QFA_SEEK_BLOCK          0x0c
  64 
  65 #endif
  66 

/* */