source: GPL/include/linux/major.h@ 18

#ifndef _LINUX_MAJOR_H
#define _LINUX_MAJOR_H

/*
 * This file has definitions for major device numbers.
 * For the device number assignments, see Documentation/devices.txt.
 */

/* limits */

/*
 * Important: Don't change this to 256.  Major number 255 is and must be
 * reserved for future expansion into a larger dev_t space.
 */
#define MAX_CHRDEV      255
#define MAX_BLKDEV      255

#define UNNAMED_MAJOR   0
#define MEM_MAJOR       1
#define RAMDISK_MAJOR   1
#define FLOPPY_MAJOR    2
#define PTY_MASTER_MAJOR 2
#define IDE0_MAJOR      3
#define PTY_SLAVE_MAJOR 3
#define HD_MAJOR        IDE0_MAJOR
#define TTY_MAJOR       4
#define TTYAUX_MAJOR    5
#define LP_MAJOR        6
#define VCS_MAJOR       7
#define LOOP_MAJOR      7
#define SCSI_DISK0_MAJOR 8
#define SCSI_TAPE_MAJOR 9
#define MD_MAJOR        9
#define MISC_MAJOR      10
#define SCSI_CDROM_MAJOR 11
#define QIC02_TAPE_MAJOR 12
#define XT_DISK_MAJOR   13
#define SOUND_MAJOR     14
#define CDU31A_CDROM_MAJOR 15
#define JOYSTICK_MAJOR  15
#define GOLDSTAR_CDROM_MAJOR 16
#define OPTICS_CDROM_MAJOR 17
#define SANYO_CDROM_MAJOR 18
#define CYCLADES_MAJOR  19
#define CYCLADESAUX_MAJOR 20
#define MITSUMI_X_CDROM_MAJOR 20
#define MFM_ACORN_MAJOR 21      /* ARM Linux /dev/mfm */
#define SCSI_GENERIC_MAJOR 21
#define Z8530_MAJOR 34
#define DIGI_MAJOR 23
#define IDE1_MAJOR      22
#define DIGICU_MAJOR 22
#define MITSUMI_CDROM_MAJOR 23
#define CDU535_CDROM_MAJOR 24
#define STL_SERIALMAJOR 24
#define MATSUSHITA_CDROM_MAJOR 25
#define STL_CALLOUTMAJOR 25
#define MATSUSHITA_CDROM2_MAJOR 26
#define QIC117_TAPE_MAJOR 27
#define MATSUSHITA_CDROM3_MAJOR 27
#define MATSUSHITA_CDROM4_MAJOR 28
#define STL_SIOMEMMAJOR 28
#define ACSI_MAJOR      28
#define AZTECH_CDROM_MAJOR 29
#define GRAPHDEV_MAJOR  29      /* SparcLinux & Linux/68k /dev/fb */
#define SHMIQ_MAJOR     85      /* Linux/mips, SGI /dev/shmiq */
#define CM206_CDROM_MAJOR 32
#define IDE2_MAJOR      33
#define IDE3_MAJOR      34
#define NETLINK_MAJOR   36
#define PS2ESDI_MAJOR   36
#define IDETAPE_MAJOR   37
#define Z2RAM_MAJOR     37
#define APBLOCK_MAJOR   38   /* AP1000 Block device */
#define DDV_MAJOR       39   /* AP1000 DDV block device */
#define NBD_MAJOR       43   /* Network block device    */
#define RISCOM8_NORMAL_MAJOR 48
#define DAC960_MAJOR    48      /* 48..55 */
#define RISCOM8_CALLOUT_MAJOR 49
#define MKISS_MAJOR     55
#define DSP56K_MAJOR    55   /* DSP56001 processor device */

#define IDE4_MAJOR      56
#define IDE5_MAJOR      57

#define SCSI_DISK1_MAJOR        65
#define SCSI_DISK2_MAJOR        66
#define SCSI_DISK3_MAJOR        67
#define SCSI_DISK4_MAJOR        68
#define SCSI_DISK5_MAJOR        69
#define SCSI_DISK6_MAJOR        70
#define SCSI_DISK7_MAJOR        71


#define LVM_BLK_MAJOR   58      /* Logical Volume Manager */

#define COMPAQ_SMART2_MAJOR     72
#define COMPAQ_SMART2_MAJOR1    73
#define COMPAQ_SMART2_MAJOR2    74
#define COMPAQ_SMART2_MAJOR3    75
#define COMPAQ_SMART2_MAJOR4    76
#define COMPAQ_SMART2_MAJOR5    77
#define COMPAQ_SMART2_MAJOR6    78
#define COMPAQ_SMART2_MAJOR7    79

#define SPECIALIX_NORMAL_MAJOR 75
#define SPECIALIX_CALLOUT_MAJOR 76

#define LVM_CHAR_MAJOR  109     /* Logical Volume Manager */

#define I2O_MAJOR               80      /* 80->87 */

#define IDE6_MAJOR      88
#define IDE7_MAJOR      89
#define IDE8_MAJOR      90
#define IDE9_MAJOR      91

#define AURORA_MAJOR 79

#define RTF_MAJOR       150
#define RAW_MAJOR       162

#define USB_ACM_MAJOR           166
#define USB_ACM_AUX_MAJOR       167
#define USB_CHAR_MAJOR          180

#define UNIX98_PTY_MASTER_MAJOR 128
#define UNIX98_PTY_MAJOR_COUNT  8
#define UNIX98_PTY_SLAVE_MAJOR  (UNIX98_PTY_MASTER_MAJOR+UNIX98_PTY_MAJOR_COUNT)

/*
 * Tests for SCSI devices.
 */

#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
  
#define SCSI_BLK_MAJOR(M) \
  (SCSI_DISK_MAJOR(M)   \
   || (M) == SCSI_CDROM_MAJOR)

static __inline__ int scsi_blk_major(int m) {
        return SCSI_BLK_MAJOR(m);
}

#endif