drivers/s390/block/dasd_fba.h

   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 */