drivers/scsi/sd.h

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 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  * Modified by Eric Youngdale eric@aib.com to
 9  * add scatter-gather, multiple outstanding request, and other
 10  * enhancements.
 11  */
 12 #ifndef _SD_H
 13 #define _SD_H
 14 /*
 15  $Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/sd.h,v 1.1 1992/07/24 06:27:38 root Exp root $
 16  */
 17
 18 #ifndef _SCSI_H
 19 #include"scsi.h"
 20 #endif
 21
 22 #ifndef _GENDISK_H
 23 #include <linux/genhd.h>
 24 #endif
 25
 26 externstruct hd_struct *sd;
 27
 28 typedefstruct scsi_disk {
 29 unsigned capacity;/* size in blocks */
 30 unsigned sector_size;/* size in bytes */
 31  Scsi_Device *device;
 32 unsigned char ready;/* flag ready for FLOPTICAL */
 33 unsigned char write_prot;/* flag write_protect for rmvable dev */
 34 unsigned char sector_bit_size;/* sector_size = 2 to the bit size power */
 35 unsigned char sector_bit_shift;/* power of 2 sectors per FS block */
 36 unsigned ten:1;/* support ten byte read / write */
 37 unsigned remap:1;/* support remapping */
 38 unsigned has_part_table:1;/* has partition table */
 39 } Scsi_Disk;
 40
 41 extern Scsi_Disk *rscsi_disks;
 42
 43 externintrevalidate_scsidisk(kdev_t dev,int maxusage);
 44
 45 #define N_SD_MAJORS 8
 46
 47 #define SD_MAJOR_MASK (N_SD_MAJORS - 1)
 48 #define SD_PARTITION(i) (((MAJOR(i) & SD_MAJOR_MASK) << 8) | (MINOR(i) & 255))
 49
 50 #endif
 51
 52 /*
 53  * Overrides for Emacs so that we follow Linus's tabbing style.
 54  * Emacs will notice this stuff at the end of the file and automatically
 55  * adjust the settings for this buffer only. This must remain at the end
 56  * of the file.
 57  * ---------------------------------------------------------------------------
 58  * Local variables:
 59  * c-indent-level: 4
 60  * c-brace-imaginary-offset: 0
 61  * c-brace-offset: -4
 62  * c-argdecl-indent: 4
 63  * c-label-offset: -4
 64  * c-continued-statement-offset: 4
 65  * c-continued-brace-offset: 0
 66  * indent-tabs-mode: nil
 67  * tab-width: 8
 68  * End:
 69  */