kernel/blk_drv/scsi/sd.h

/* */
   1 /*
   2  *      sd.h Copyright (C) 1992 Drew Eckhardt 
   3  *      SCSI disk driver header file by
   4  *              Drew Eckhardt 
   5  *
   6  *      <drew@colorado.edu>
   7  */
   8 #ifndef _SD_H
   9         #define _SD_H
  10 /*
  11         $Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/sd.h,v 1.1 1992/04/24 18:01:50 root Exp root $
  12 */
  13 
  14 #ifndef _SCSI_H
  15 #include "scsi.h"
  16 #endif
  17 
  18 #define MAX_SD 2
  19 
  20 typedef struct partition {
  21         unsigned char boot_ind;         /* 0x80 - active (unused) */
  22         unsigned char head;             /* ? */
  23         unsigned char sector;           /* ? */
  24         unsigned char cyl;              /* ? */
  25         unsigned char sys_ind;          /* ? */
  26         unsigned char end_head;         /* ? */
  27         unsigned char end_sector;       /* ? */
  28         unsigned char end_cyl;          /* ? */
  29         unsigned int start_sect;        /* starting sector counting from 0 */
  30         unsigned int nr_sects;          /* nr of sectors in partition */
  31 } Partition;
  32 
  33 extern int NR_SD;
  34 
  35 extern Partition scsi_disks[MAX_SD << 4] ;
  36 
  37 
  38 typedef struct {
  39                 unsigned capacity;              /* size in blocks */
  40                 unsigned sector_size;           /* size in bytes */
  41                 Scsi_Device  *device;           
  42                 unsigned char sector_bit_size;  /* sector_size = 2 to the  bit size power */
  43                 unsigned char sector_bit_shift; /* power of 2 sectors per FS block */
  44                 unsigned ten:1;                 /* support ten byte read / write */
  45                 unsigned remap:1;               /* support remapping */
  46                 unsigned use:1;                 /* after the initial inquiry, is 
  47                                                    the device still supported ? */
  48                 } Scsi_Disk;
  49         
  50 extern Scsi_Disk rscsi_disks[MAX_SD];
  51 
  52 void sd_init(void);
  53 
  54 #define HOST (rscsi_disks[DEVICE_NR(CURRENT->dev)].device->host_no)
  55 #define ID (rscsi_disks[DEVICE_NR(CURRENT->dev)].device->id)
  56 #define LUN (rscsi_disks[DEVICE_NR(CURRENT->dev)].device->lun)
  57 #endif
/* */
root/kernel/blk_drv/scsi/sd.h

INCLUDED FROM
