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linux/drivers/s390/block/dasd_eckd.h
Stefan Haberland e4dbb0f2b5 [S390] dasd: Add support for raw ECKD access. 
Normal I/O operations through the DASD device driver give only access
to the data fields of an ECKD device even for track based I/O.
This patch extends the DASD device driver to give access to whole
ECKD tracks including count, key and data fields.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-01-05 12:47:30 +01:00

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/*
* File...........: linux/drivers/s390/block/dasd_eckd.h
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Horst Hummel <Horst.Hummel@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
*
*/
#ifndef DASD_ECKD_H
#define DASD_ECKD_H
/*****************************************************************************
* SECTION: CCW Definitions
****************************************************************************/
#define DASD_ECKD_CCW_WRITE 0x05
#define DASD_ECKD_CCW_READ 0x06
#define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09
#define DASD_ECKD_CCW_READ_HOME_ADDRESS 0x0a
#define DASD_ECKD_CCW_WRITE_KD 0x0d
#define DASD_ECKD_CCW_READ_KD 0x0e
#define DASD_ECKD_CCW_ERASE 0x11
#define DASD_ECKD_CCW_READ_COUNT 0x12
#define DASD_ECKD_CCW_SLCK 0x14
#define DASD_ECKD_CCW_WRITE_RECORD_ZERO 0x15
#define DASD_ECKD_CCW_READ_RECORD_ZERO 0x16
#define DASD_ECKD_CCW_WRITE_CKD 0x1d
#define DASD_ECKD_CCW_READ_CKD 0x1e
#define DASD_ECKD_CCW_PSF 0x27
#define DASD_ECKD_CCW_SNID 0x34
#define DASD_ECKD_CCW_RSSD 0x3e
#define DASD_ECKD_CCW_LOCATE_RECORD 0x47
#define DASD_ECKD_CCW_SNSS 0x54
#define DASD_ECKD_CCW_DEFINE_EXTENT 0x63
#define DASD_ECKD_CCW_WRITE_MT 0x85
#define DASD_ECKD_CCW_READ_MT 0x86
#define DASD_ECKD_CCW_WRITE_KD_MT 0x8d
#define DASD_ECKD_CCW_READ_KD_MT 0x8e
#define DASD_ECKD_CCW_RELEASE 0x94
#define DASD_ECKD_CCW_WRITE_FULL_TRACK 0x95
#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
#define DASD_ECKD_CCW_WRITE_TRACK_DATA 0xA5
#define DASD_ECKD_CCW_READ_TRACK_DATA 0xA6
#define DASD_ECKD_CCW_RESERVE 0xB4
#define DASD_ECKD_CCW_READ_TRACK 0xDE
#define DASD_ECKD_CCW_PFX 0xE7
#define DASD_ECKD_CCW_PFX_READ 0xEA
#define DASD_ECKD_CCW_RSCK 0xF9
#define DASD_ECKD_CCW_RCD 0xFA
/*
* Perform Subsystem Function / Sub-Orders
*/
#define PSF_ORDER_PRSSD 0x18
#define PSF_ORDER_SSC 0x1D
/*
* Size that is reportet for large volumes in the old 16-bit no_cyl field
*/
#define LV_COMPAT_CYL 0xFFFE
#define FCX_MAX_DATA_FACTOR 65536
#define DASD_ECKD_RCD_DATA_SIZE 256
/*****************************************************************************
* SECTION: Type Definitions
****************************************************************************/
struct eckd_count {
__u16 cyl;
__u16 head;
__u8 record;
__u8 kl;
__u16 dl;
} __attribute__ ((packed));
struct ch_t {
__u16 cyl;
__u16 head;
} __attribute__ ((packed));
struct chs_t {
__u16 cyl;
__u16 head;
__u32 sector;
} __attribute__ ((packed));
struct chr_t {
__u16 cyl;
__u16 head;
__u8 record;
} __attribute__ ((packed));
struct geom_t {
__u16 cyl;
__u16 head;
__u32 sector;
} __attribute__ ((packed));
struct eckd_home {
__u8 skip_control[14];
__u16 cell_number;
__u8 physical_addr[3];
__u8 flag;
struct ch_t track_addr;
__u8 reserved;
__u8 key_length;
__u8 reserved2[2];
} __attribute__ ((packed));
struct DE_eckd_data {
struct {
unsigned char perm:2; /* Permissions on this extent */
unsigned char reserved:1;
unsigned char seek:2; /* Seek control */
unsigned char auth:2; /* Access authorization */
unsigned char pci:1; /* PCI Fetch mode */
} __attribute__ ((packed)) mask;
struct {
unsigned char mode:2; /* Architecture mode */
unsigned char ckd:1; /* CKD Conversion */
unsigned char operation:3; /* Operation mode */
unsigned char cfw:1; /* Cache fast write */
unsigned char dfw:1; /* DASD fast write */
} __attribute__ ((packed)) attributes;
__u16 blk_size; /* Blocksize */
__u16 fast_write_id;
__u8 ga_additional; /* Global Attributes Additional */
__u8 ga_extended; /* Global Attributes Extended */
struct ch_t beg_ext;
struct ch_t end_ext;
unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
__u8 ep_format; /* Extended Parameter format byte */
__u8 ep_prio; /* Extended Parameter priority I/O byte */
__u8 ep_reserved1; /* Extended Parameter Reserved */
__u8 ep_rec_per_track; /* Number of records on a track */
__u8 ep_reserved[4]; /* Extended Parameter Reserved */
} __attribute__ ((packed));
struct LO_eckd_data {
struct {
unsigned char orientation:2;
unsigned char operation:6;
} __attribute__ ((packed)) operation;
struct {
unsigned char last_bytes_used:1;
unsigned char reserved:6;
unsigned char read_count_suffix:1;
} __attribute__ ((packed)) auxiliary;
__u8 unused;
__u8 count;
struct ch_t seek_addr;
struct chr_t search_arg;
__u8 sector;
__u16 length;
} __attribute__ ((packed));
struct LRE_eckd_data {
struct {
unsigned char orientation:2;
unsigned char operation:6;
} __attribute__ ((packed)) operation;
struct {
unsigned char length_valid:1;
unsigned char length_scope:1;
unsigned char imbedded_ccw_valid:1;
unsigned char check_bytes:2;
unsigned char imbedded_count_valid:1;
unsigned char reserved:1;
unsigned char read_count_suffix:1;
} __attribute__ ((packed)) auxiliary;
__u8 imbedded_ccw;
__u8 count;
struct ch_t seek_addr;
struct chr_t search_arg;
__u8 sector;
__u16 length;
__u8 imbedded_count;
__u8 extended_operation;
__u16 extended_parameter_length;
__u8 extended_parameter[0];
} __attribute__ ((packed));
/* Prefix data for format 0x00 and 0x01 */
struct PFX_eckd_data {
unsigned char format;
struct {
unsigned char define_extent:1;
unsigned char time_stamp:1;
unsigned char verify_base:1;
unsigned char hyper_pav:1;
unsigned char reserved:4;
} __attribute__ ((packed)) validity;
__u8 base_address;
__u8 aux;
__u8 base_lss;
__u8 reserved[7];
struct DE_eckd_data define_extent;
struct LRE_eckd_data locate_record;
} __attribute__ ((packed));
struct dasd_eckd_characteristics {
__u16 cu_type;
struct {
unsigned char support:2;
unsigned char async:1;
unsigned char reserved:1;
unsigned char cache_info:1;
unsigned char model:3;
} __attribute__ ((packed)) cu_model;
__u16 dev_type;
__u8 dev_model;
struct {
unsigned char mult_burst:1;
unsigned char RT_in_LR:1;
unsigned char reserved1:1;
unsigned char RD_IN_LR:1;
unsigned char reserved2:4;
unsigned char reserved3:8;
unsigned char defect_wr:1;
unsigned char XRC_supported:1;
unsigned char reserved4:1;
unsigned char striping:1;
unsigned char reserved5:4;
unsigned char cfw:1;
unsigned char reserved6:2;
unsigned char cache:1;
unsigned char dual_copy:1;
unsigned char dfw:1;
unsigned char reset_alleg:1;
unsigned char sense_down:1;
} __attribute__ ((packed)) facilities;
__u8 dev_class;
__u8 unit_type;
__u16 no_cyl;
__u16 trk_per_cyl;
__u8 sec_per_trk;
__u8 byte_per_track[3];
__u16 home_bytes;
__u8 formula;
union {
struct {
__u8 f1;
__u16 f2;
__u16 f3;
} __attribute__ ((packed)) f_0x01;
struct {
__u8 f1;
__u8 f2;
__u8 f3;
__u8 f4;
__u8 f5;
} __attribute__ ((packed)) f_0x02;
} __attribute__ ((packed)) factors;
__u16 first_alt_trk;
__u16 no_alt_trk;
__u16 first_dia_trk;
__u16 no_dia_trk;
__u16 first_sup_trk;
__u16 no_sup_trk;
__u8 MDR_ID;
__u8 OBR_ID;
__u8 director;
__u8 rd_trk_set;
__u16 max_rec_zero;
__u8 reserved1;
__u8 RWANY_in_LR;
__u8 factor6;
__u8 factor7;
__u8 factor8;
__u8 reserved2[3];
__u8 reserved3[6];
__u32 long_no_cyl;
} __attribute__ ((packed));
/* elements of the configuration data */
struct dasd_ned {
struct {
__u8 identifier:2;
__u8 token_id:1;
__u8 sno_valid:1;
__u8 subst_sno:1;
__u8 recNED:1;
__u8 emuNED:1;
__u8 reserved:1;
} __attribute__ ((packed)) flags;
__u8 descriptor;
__u8 dev_class;
__u8 reserved;
__u8 dev_type[6];
__u8 dev_model[3];
__u8 HDA_manufacturer[3];
__u8 HDA_location[2];
__u8 HDA_seqno[12];
__u8 ID;
__u8 unit_addr;
} __attribute__ ((packed));
struct dasd_sneq {
struct {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
__u8 res1;
__u16 format;
__u8 res2[4]; /* byte 4- 7 */
__u8 sua_flags; /* byte 8 */
__u8 base_unit_addr; /* byte 9 */
__u8 res3[22]; /* byte 10-31 */
} __attribute__ ((packed));
struct vd_sneq {
struct {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
__u8 res1;
__u16 format;
__u8 res2[4]; /* byte 4- 7 */
__u8 uit[16]; /* byte 8-23 */
__u8 res3[8]; /* byte 24-31 */
} __attribute__ ((packed));
struct dasd_gneq {
struct {
__u8 identifier:2;
__u8 reserved:6;
} __attribute__ ((packed)) flags;
__u8 reserved[5];
struct {
__u8 value:2;
__u8 number:6;
} __attribute__ ((packed)) timeout;
__u8 reserved3;
__u16 subsystemID;
__u8 reserved2[22];
} __attribute__ ((packed));
struct dasd_rssd_features {
char feature[256];
} __attribute__((packed));
/*
* Perform Subsystem Function - Prepare for Read Subsystem Data
*/
struct dasd_psf_prssd_data {
unsigned char order;
unsigned char flags;
unsigned char reserved[4];
unsigned char suborder;
unsigned char varies[5];
} __attribute__ ((packed));
/*
* Perform Subsystem Function - Set Subsystem Characteristics
*/
struct dasd_psf_ssc_data {
unsigned char order;
unsigned char flags;
unsigned char cu_type[4];
unsigned char suborder;
unsigned char reserved[59];
} __attribute__((packed));
/*
* some structures and definitions for alias handling
*/
struct dasd_unit_address_configuration {
struct {
char ua_type;
char base_ua;
} unit[256];
} __attribute__((packed));
#define MAX_DEVICES_PER_LCU 256
/* flags on the LCU */
#define NEED_UAC_UPDATE 0x01
#define UPDATE_PENDING 0x02
enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
struct alias_root {
struct list_head serverlist;
spinlock_t lock;
};
struct alias_server {
struct list_head server;
struct dasd_uid uid;
struct list_head lculist;
};
struct summary_unit_check_work_data {
char reason;
struct dasd_device *device;
struct work_struct worker;
};
struct read_uac_work_data {
struct dasd_device *device;
struct delayed_work dwork;
};
struct alias_lcu {
struct list_head lcu;
struct dasd_uid uid;
enum pavtype pav;
char flags;
spinlock_t lock;
struct list_head grouplist;
struct list_head active_devices;
struct list_head inactive_devices;
struct dasd_unit_address_configuration *uac;
struct summary_unit_check_work_data suc_data;
struct read_uac_work_data ruac_data;
struct dasd_ccw_req *rsu_cqr;
struct completion lcu_setup;
};
struct alias_pav_group {
struct list_head group;
struct dasd_uid uid;
struct alias_lcu *lcu;
struct list_head baselist;
struct list_head aliaslist;
struct dasd_device *next;
};
struct dasd_eckd_private {
struct dasd_eckd_characteristics rdc_data;
u8 *conf_data;
int conf_len;
/* pointers to specific parts in the conf_data */
struct dasd_ned *ned;
struct dasd_sneq *sneq;
struct vd_sneq *vdsneq;
struct dasd_gneq *gneq;
struct eckd_count count_area[5];
int init_cqr_status;
int uses_cdl;
struct attrib_data_t attrib; /* e.g. cache operations */
struct dasd_rssd_features features;
u32 real_cyl;
/* alias managemnet */
struct dasd_uid uid;
struct alias_pav_group *pavgroup;
struct alias_lcu *lcu;
int count;
u32 fcx_max_data;
};
int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
int dasd_alias_add_device(struct dasd_device *);
int dasd_alias_remove_device(struct dasd_device *);
struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
void dasd_alias_lcu_setup_complete(struct dasd_device *);
void dasd_alias_wait_for_lcu_setup(struct dasd_device *);
int dasd_alias_update_add_device(struct dasd_device *);
#endif /* DASD_ECKD_H */
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