forked from Minki/linux
a0610a8ad8
ECKD, FBA, and the DIAG discipline use slightly different block layer settings. In preparation of even more diverse queue settings, make dasd_setup_queue() a discipline function. Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* Coypright IBM Corp. 1999, 2000
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*
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*/
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#ifndef DASD_FBA_H
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#define DASD_FBA_H
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/*
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* Maximum number of blocks to be chained
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*/
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#define DASD_FBA_MAX_BLOCKS 96
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struct DE_fba_data {
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struct {
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unsigned char perm:2; /* Permissions on this extent */
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unsigned char zero:2; /* Must be zero */
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unsigned char da:1; /* usually zero */
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unsigned char diag:1; /* allow diagnose */
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unsigned char zero2:2; /* zero */
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} __attribute__ ((packed)) mask;
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__u8 zero; /* Must be zero */
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__u16 blk_size; /* Blocksize */
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__u32 ext_loc; /* Extent locator */
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__u32 ext_beg; /* logical number of block 0 in extent */
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__u32 ext_end; /* logocal number of last block in extent */
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} __attribute__ ((packed));
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struct LO_fba_data {
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struct {
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unsigned char zero:4;
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unsigned char cmd:4;
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} __attribute__ ((packed)) operation;
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__u8 auxiliary;
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__u16 blk_ct;
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__u32 blk_nr;
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} __attribute__ ((packed));
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struct dasd_fba_characteristics {
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union {
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__u8 c;
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struct {
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unsigned char reserved:1;
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unsigned char overrunnable:1;
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unsigned char burst_byte:1;
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unsigned char data_chain:1;
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unsigned char zeros:4;
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} __attribute__ ((packed)) bits;
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} __attribute__ ((packed)) mode;
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union {
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__u8 c;
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struct {
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unsigned char zero0:1;
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unsigned char removable:1;
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unsigned char shared:1;
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unsigned char zero1:1;
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unsigned char mam:1;
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unsigned char zeros:3;
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} __attribute__ ((packed)) bits;
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} __attribute__ ((packed)) features;
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__u8 dev_class;
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__u8 unit_type;
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__u16 blk_size;
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__u32 blk_per_cycl;
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__u32 blk_per_bound;
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__u32 blk_bdsa;
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__u32 reserved0;
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__u16 reserved1;
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__u16 blk_ce;
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__u32 reserved2;
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__u16 reserved3;
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} __attribute__ ((packed));
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#endif /* DASD_FBA_H */
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