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/* 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 */
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