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Diffstat (limited to 'drivers/s390/block/dasd_fba.h')
-rw-r--r--drivers/s390/block/dasd_fba.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_fba.h b/drivers/s390/block/dasd_fba.h
new file mode 100644
index 000000000..45ddabec4
--- /dev/null
+++ b/drivers/s390/block/dasd_fba.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * Copyright IBM Corp. 1999, 2000
+ *
+ */
+
+#ifndef DASD_FBA_H
+#define DASD_FBA_H
+
+/*
+ * Maximum number of blocks to be chained
+ */
+#define DASD_FBA_MAX_BLOCKS 96
+
+struct DE_fba_data {
+ struct {
+ unsigned char perm:2; /* Permissions on this extent */
+ unsigned char zero:2; /* Must be zero */
+ unsigned char da:1; /* usually zero */
+ unsigned char diag:1; /* allow diagnose */
+ unsigned char zero2:2; /* zero */
+ } __attribute__ ((packed)) mask;
+ __u8 zero; /* Must be zero */
+ __u16 blk_size; /* Blocksize */
+ __u32 ext_loc; /* Extent locator */
+ __u32 ext_beg; /* logical number of block 0 in extent */
+ __u32 ext_end; /* logocal number of last block in extent */
+} __attribute__ ((packed));
+
+struct LO_fba_data {
+ struct {
+ unsigned char zero:4;
+ unsigned char cmd:4;
+ } __attribute__ ((packed)) operation;
+ __u8 auxiliary;
+ __u16 blk_ct;
+ __u32 blk_nr;
+} __attribute__ ((packed));
+
+struct dasd_fba_characteristics {
+ union {
+ __u8 c;
+ struct {
+ unsigned char reserved:1;
+ unsigned char overrunnable:1;
+ unsigned char burst_byte:1;
+ unsigned char data_chain:1;
+ unsigned char zeros:4;
+ } __attribute__ ((packed)) bits;
+ } __attribute__ ((packed)) mode;
+ union {
+ __u8 c;
+ struct {
+ unsigned char zero0:1;
+ unsigned char removable:1;
+ unsigned char shared:1;
+ unsigned char zero1:1;
+ unsigned char mam:1;
+ unsigned char zeros:3;
+ } __attribute__ ((packed)) bits;
+ } __attribute__ ((packed)) features;
+ __u8 dev_class;
+ __u8 unit_type;
+ __u16 blk_size;
+ __u32 blk_per_cycl;
+ __u32 blk_per_bound;
+ __u32 blk_bdsa;
+ __u32 reserved0;
+ __u16 reserved1;
+ __u16 blk_ce;
+ __u32 reserved2;
+ __u16 reserved3;
+} __attribute__ ((packed));
+
+#endif /* DASD_FBA_H */