kernel/drivers/s390/block/dasd_fba.h

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