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/*

 * File...........: linux/drivers/s390/block/dasd_fba.h

 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>

 *                  Horst Hummel <Horst.Hummel@de.ibm.com>

 * Bugreports.to..: <Linux390@de.ibm.com>

 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000

 *

 * $Revision: 1.1.1.1 $

 *

 * History of changes

 *

 */

#ifndef DASD_FBA_H

#define DASD_FBA_H

typedef

    struct DE_fba_data_t {

        struct {

                unsigned char perm:2;   /* Permissions on this extent */

                unsigned char zero:2;   /* Must be zero */

                unsigned char da:1;     /* usually zero */

                unsigned char diag:1;   /* allow diagnose */

                unsigned char zero2:2;  /* zero */

        } __attribute__ ((packed)) mask;

        __u8 zero;              /* Must be zero */

        __u16 blk_size;         /* Blocksize */

        __u32 ext_loc;          /* Extent locator */

        __u32 ext_beg;          /* logical number of block 0 in extent */

        __u32 ext_end;          /* logocal number of last block in extent */

} __attribute__ ((packed))

    DE_fba_data_t;

typedef

    struct LO_fba_data_t {

        struct {

                unsigned char zero:4;

                unsigned char cmd:4;

        } __attribute__ ((packed)) operation;

        __u8 auxiliary;

        __u16 blk_ct;

        __u32 blk_nr;

} __attribute__ ((packed))

    LO_fba_data_t;

typedef

    struct dasd_fba_characteristics_t {

        union {

                __u8 c;

                struct {

                        unsigned char reserved:1;

                        unsigned char overrunnable:1;

                        unsigned char burst_byte:1;

                        unsigned char data_chain:1;

                        unsigned char zeros:4;

                } __attribute__ ((packed)) bits;

        } __attribute__ ((packed)) mode;

        union {

                __u8 c;

                struct {

                        unsigned char zero0:1;

                        unsigned char removable:1;

                        unsigned char shared:1;

                        unsigned char zero1:1;

                        unsigned char mam:1;

                        unsigned char zeros:3;

                } __attribute__ ((packed)) bits;

        } __attribute__ ((packed)) features;

        __u8 dev_class;

        __u8 unit_type;

        __u16 blk_size;

        __u32 blk_per_cycl;

        __u32 blk_per_bound;

        __u32 blk_bdsa;

        __u32 reserved0;

        __u16 reserved1;

        __u16 blk_ce;

        __u32 reserved2;

        __u16 reserved3;

} __attribute__ ((packed))

    dasd_fba_characteristics_t;

int dasd_fba_init (void);

void dasd_fba_cleanup (void);

#endif                          /* DASD_FBA_H */