/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
 * Bugreports.to..: <Linux390@de.ibm.com>
 * Copyright IBM Corp. 1999, 2000
 *
 */

#ifndef DASD_FBA_H
#define DASD_FBA_H

/*
 * Maximum number of blocks to be chained
 */
#define DASD_FBA_MAX_BLOCKS             96

struct DE_fba_data {
        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));

struct LO_fba_data {
        struct {
                unsigned char zero:4;
                unsigned char cmd:4;
        } __attribute__ ((packed)) operation;
        __u8 auxiliary;
        __u16 blk_ct;
        __u32 blk_nr;
} __attribute__ ((packed));

struct dasd_fba_characteristics {
        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));

#endif                          /* DASD_FBA_H */