diff options
Diffstat (limited to 'drivers/s390/block/dasd_eckd.h')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h index bc5998068ddf..4226936427ec 100644 --- a/drivers/s390/block/dasd_eckd.h +++ b/drivers/s390/block/dasd_eckd.h @@ -50,6 +50,10 @@ #define DASD_ECKD_CCW_PFX_READ 0xEA #define DASD_ECKD_CCW_RSCK 0xF9 #define DASD_ECKD_CCW_RCD 0xFA +#define DASD_ECKD_CCW_DSO 0xF7 + +/* Define Subssystem Function / Orders */ +#define DSO_ORDER_RAS 0x81 /* * Perform Subsystem Function / Orders @@ -513,6 +517,42 @@ struct dasd_psf_ssc_data { unsigned char reserved[59]; } __attribute__((packed)); +/* Maximum number of extents for a single Release Allocated Space command */ +#define DASD_ECKD_RAS_EXTS_MAX 110U + +struct dasd_dso_ras_ext_range { + struct ch_t beg_ext; + struct ch_t end_ext; +} __packed; + +/* + * Define Subsytem Operation - Release Allocated Space + */ +struct dasd_dso_ras_data { + __u8 order; + struct { + __u8 message:1; /* Must be zero */ + __u8 reserved1:2; + __u8 vol_type:1; /* 0 - CKD/FBA, 1 - FB */ + __u8 reserved2:4; + } __packed flags; + /* Operation Flags to specify scope */ + struct { + __u8 reserved1:2; + /* Release Space by Extent */ + __u8 by_extent:1; /* 0 - entire volume, 1 - specified extents */ + __u8 guarantee_init:1; + __u8 force_release:1; /* Internal - will be ignored */ + __u16 reserved2:11; + } __packed op_flags; + __u8 lss; + __u8 dev_addr; + __u32 reserved1; + __u8 reserved2[10]; + __u16 nr_exts; /* Defines number of ext_scope - max 110 */ + __u16 reserved3; +} __packed; + /* * some structures and definitions for alias handling |