18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 48c2ecf20Sopenharmony_ci * Bugreports.to..: <Linux390@de.ibm.com> 58c2ecf20Sopenharmony_ci * Copyright IBM Corp. 1999, 2000 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci */ 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci#ifndef DASD_FBA_H 108c2ecf20Sopenharmony_ci#define DASD_FBA_H 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci/* 138c2ecf20Sopenharmony_ci * Maximum number of blocks to be chained 148c2ecf20Sopenharmony_ci */ 158c2ecf20Sopenharmony_ci#define DASD_FBA_MAX_BLOCKS 96 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_cistruct DE_fba_data { 188c2ecf20Sopenharmony_ci struct { 198c2ecf20Sopenharmony_ci unsigned char perm:2; /* Permissions on this extent */ 208c2ecf20Sopenharmony_ci unsigned char zero:2; /* Must be zero */ 218c2ecf20Sopenharmony_ci unsigned char da:1; /* usually zero */ 228c2ecf20Sopenharmony_ci unsigned char diag:1; /* allow diagnose */ 238c2ecf20Sopenharmony_ci unsigned char zero2:2; /* zero */ 248c2ecf20Sopenharmony_ci } __attribute__ ((packed)) mask; 258c2ecf20Sopenharmony_ci __u8 zero; /* Must be zero */ 268c2ecf20Sopenharmony_ci __u16 blk_size; /* Blocksize */ 278c2ecf20Sopenharmony_ci __u32 ext_loc; /* Extent locator */ 288c2ecf20Sopenharmony_ci __u32 ext_beg; /* logical number of block 0 in extent */ 298c2ecf20Sopenharmony_ci __u32 ext_end; /* logocal number of last block in extent */ 308c2ecf20Sopenharmony_ci} __attribute__ ((packed)); 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_cistruct LO_fba_data { 338c2ecf20Sopenharmony_ci struct { 348c2ecf20Sopenharmony_ci unsigned char zero:4; 358c2ecf20Sopenharmony_ci unsigned char cmd:4; 368c2ecf20Sopenharmony_ci } __attribute__ ((packed)) operation; 378c2ecf20Sopenharmony_ci __u8 auxiliary; 388c2ecf20Sopenharmony_ci __u16 blk_ct; 398c2ecf20Sopenharmony_ci __u32 blk_nr; 408c2ecf20Sopenharmony_ci} __attribute__ ((packed)); 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_cistruct dasd_fba_characteristics { 438c2ecf20Sopenharmony_ci union { 448c2ecf20Sopenharmony_ci __u8 c; 458c2ecf20Sopenharmony_ci struct { 468c2ecf20Sopenharmony_ci unsigned char reserved:1; 478c2ecf20Sopenharmony_ci unsigned char overrunnable:1; 488c2ecf20Sopenharmony_ci unsigned char burst_byte:1; 498c2ecf20Sopenharmony_ci unsigned char data_chain:1; 508c2ecf20Sopenharmony_ci unsigned char zeros:4; 518c2ecf20Sopenharmony_ci } __attribute__ ((packed)) bits; 528c2ecf20Sopenharmony_ci } __attribute__ ((packed)) mode; 538c2ecf20Sopenharmony_ci union { 548c2ecf20Sopenharmony_ci __u8 c; 558c2ecf20Sopenharmony_ci struct { 568c2ecf20Sopenharmony_ci unsigned char zero0:1; 578c2ecf20Sopenharmony_ci unsigned char removable:1; 588c2ecf20Sopenharmony_ci unsigned char shared:1; 598c2ecf20Sopenharmony_ci unsigned char zero1:1; 608c2ecf20Sopenharmony_ci unsigned char mam:1; 618c2ecf20Sopenharmony_ci unsigned char zeros:3; 628c2ecf20Sopenharmony_ci } __attribute__ ((packed)) bits; 638c2ecf20Sopenharmony_ci } __attribute__ ((packed)) features; 648c2ecf20Sopenharmony_ci __u8 dev_class; 658c2ecf20Sopenharmony_ci __u8 unit_type; 668c2ecf20Sopenharmony_ci __u16 blk_size; 678c2ecf20Sopenharmony_ci __u32 blk_per_cycl; 688c2ecf20Sopenharmony_ci __u32 blk_per_bound; 698c2ecf20Sopenharmony_ci __u32 blk_bdsa; 708c2ecf20Sopenharmony_ci __u32 reserved0; 718c2ecf20Sopenharmony_ci __u16 reserved1; 728c2ecf20Sopenharmony_ci __u16 blk_ce; 738c2ecf20Sopenharmony_ci __u32 reserved2; 748c2ecf20Sopenharmony_ci __u16 reserved3; 758c2ecf20Sopenharmony_ci} __attribute__ ((packed)); 768c2ecf20Sopenharmony_ci 778c2ecf20Sopenharmony_ci#endif /* DASD_FBA_H */ 78