1 /* 2 * File...........: linux/drivers/s390/block/dasd_fba.h 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Bugreports.to..: <Linux390@de.ibm.com> 5 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 6 * 7 * $Revision: 1.6 $ 8 */ 9 10 #ifndef DASD_FBA_H 11 #define DASD_FBA_H 12 13 struct DE_fba_data { 14 struct { 15 unsigned char perm:2; /* Permissions on this extent */ 16 unsigned char zero:2; /* Must be zero */ 17 unsigned char da:1; /* usually zero */ 18 unsigned char diag:1; /* allow diagnose */ 19 unsigned char zero2:2; /* zero */ 20 } __attribute__ ((packed)) mask; 21 __u8 zero; /* Must be zero */ 22 __u16 blk_size; /* Blocksize */ 23 __u32 ext_loc; /* Extent locator */ 24 __u32 ext_beg; /* logical number of block 0 in extent */ 25 __u32 ext_end; /* logocal number of last block in extent */ 26 } __attribute__ ((packed)); 27 28 struct LO_fba_data { 29 struct { 30 unsigned char zero:4; 31 unsigned char cmd:4; 32 } __attribute__ ((packed)) operation; 33 __u8 auxiliary; 34 __u16 blk_ct; 35 __u32 blk_nr; 36 } __attribute__ ((packed)); 37 38 struct dasd_fba_characteristics { 39 union { 40 __u8 c; 41 struct { 42 unsigned char reserved:1; 43 unsigned char overrunnable:1; 44 unsigned char burst_byte:1; 45 unsigned char data_chain:1; 46 unsigned char zeros:4; 47 } __attribute__ ((packed)) bits; 48 } __attribute__ ((packed)) mode; 49 union { 50 __u8 c; 51 struct { 52 unsigned char zero0:1; 53 unsigned char removable:1; 54 unsigned char shared:1; 55 unsigned char zero1:1; 56 unsigned char mam:1; 57 unsigned char zeros:3; 58 } __attribute__ ((packed)) bits; 59 } __attribute__ ((packed)) features; 60 __u8 dev_class; 61 __u8 unit_type; 62 __u16 blk_size; 63 __u32 blk_per_cycl; 64 __u32 blk_per_bound; 65 __u32 blk_bdsa; 66 __u32 reserved0; 67 __u16 reserved1; 68 __u16 blk_ce; 69 __u32 reserved2; 70 __u16 reserved3; 71 } __attribute__ ((packed)); 72 73 #endif /* DASD_FBA_H */ 74