drivers/s390/block/dasd_fba.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
   4  * Bugreports.to..: <Linux390@de.ibm.com>
   5  * Coypright IBM Corp. 1999, 2000
   6  *
   7  */
   8
   9 #ifndef DASD_FBA_H
  10 #define DASD_FBA_H
  11
  12 struct DE_fba_data {
  13         struct {
  14                 unsigned char perm:2;   /* Permissions on this extent */
  15                 unsigned char zero:2;   /* Must be zero */
  16                 unsigned char da:1;     /* usually zero */
  17                 unsigned char diag:1;   /* allow diagnose */
  18                 unsigned char zero2:2;  /* zero */
  19         } __attribute__ ((packed)) mask;
  20         __u8 zero;              /* Must be zero */
  21         __u16 blk_size;         /* Blocksize */
  22         __u32 ext_loc;          /* Extent locator */
  23         __u32 ext_beg;          /* logical number of block 0 in extent */
  24         __u32 ext_end;          /* logocal number of last block in extent */
  25 } __attribute__ ((packed));
  26
  27 struct LO_fba_data {
  28         struct {
  29                 unsigned char zero:4;
  30                 unsigned char cmd:4;
  31         } __attribute__ ((packed)) operation;
  32         __u8 auxiliary;
  33         __u16 blk_ct;
  34         __u32 blk_nr;
  35 } __attribute__ ((packed));
  36
  37 struct dasd_fba_characteristics {
  38         union {
  39                 __u8 c;
  40                 struct {
  41                         unsigned char reserved:1;
  42                         unsigned char overrunnable:1;
  43                         unsigned char burst_byte:1;
  44                         unsigned char data_chain:1;
  45                         unsigned char zeros:4;
  46                 } __attribute__ ((packed)) bits;
  47         } __attribute__ ((packed)) mode;
  48         union {
  49                 __u8 c;
  50                 struct {
  51                         unsigned char zero0:1;
  52                         unsigned char removable:1;
  53                         unsigned char shared:1;
  54                         unsigned char zero1:1;
  55                         unsigned char mam:1;
  56                         unsigned char zeros:3;
  57                 } __attribute__ ((packed)) bits;
  58         } __attribute__ ((packed)) features;
  59         __u8 dev_class;
  60         __u8 unit_type;
  61         __u16 blk_size;
  62         __u32 blk_per_cycl;
  63         __u32 blk_per_bound;
  64         __u32 blk_bdsa;
  65         __u32 reserved0;
  66         __u16 reserved1;
  67         __u16 blk_ce;
  68         __u32 reserved2;
  69         __u16 reserved3;
  70 } __attribute__ ((packed));
  71
  72 #endif                          /* DASD_FBA_H */