Release 4.7 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>
 * Copyright IBM Corp. 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_READ_COUNT_MT	 0x92

#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_CUIR_RESPONSE		 0x1A

#define PSF_SUBORDER_QHA		 0x1C

#define PSF_ORDER_SSC			 0x1D

/*
 * CUIR response condition codes
 */

#define PSF_CUIR_INVALID		 0x00

#define PSF_CUIR_COMPLETED		 0x01

#define PSF_CUIR_NOT_SUPPORTED		 0x02

#define PSF_CUIR_ERROR_IN_REQ		 0x03

#define PSF_CUIR_DENIED			 0x04

#define PSF_CUIR_LAST_PATH		 0x05

#define PSF_CUIR_DEVICE_ONLINE		 0x06

#define PSF_CUIR_VARY_FAILURE		 0x07

#define PSF_CUIR_SOFTWARE_FAILURE	 0x08

#define PSF_CUIR_NOT_RECOGNIZED		 0x09

/*
 * CUIR codes
 */

#define CUIR_QUIESCE			 0x01

#define CUIR_RESUME			 0x02

/*
 * attention message definitions
 */

#define ATTENTION_LENGTH_CUIR		 0x0e

#define ATTENTION_FORMAT_CUIR		 0x01


#define DASD_ECKD_PG_GROUPED		 0x10

/*
 * 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 record_selector;
	
__u8 reserved[4];
	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));


struct dasd_rssd_messages {
	
__u16 length;
	
__u8 format;
	
__u8 code;
	
__u32 message_id;
	
__u8 flags;
	
char messages[4087];
} 
__packed;


struct dasd_cuir_message {
	
__u16 length;
	
__u8 format;
	
__u8 code;
	
__u32 message_id;
	
__u8 flags;
	
__u8 neq_map[3];
	
__u8 ned_map;
	
__u8 record_selector;
} 
__packed;


struct dasd_psf_cuir_response {
	
__u8 order;
	
__u8 flags;
	
__u8 cc;
	
__u8 chpid;
	
__u16 device_nr;
	
__u16 reserved;
	
__u32 message_id;
	
__u64 system_id;
	
__u8 cssid;
	
__u8 ssid;
} 
__packed;


struct dasd_ckd_path_group_entry {
	
__u8 status_flags;
	
__u8 pgid[11];
	
__u8 sysplex_name[8];
	
__u32 timestamp;
	
__u32 cylinder;
	
__u8 reserved[4];
} 
__packed;


struct dasd_ckd_host_information {
	
__u8 access_flags;
	
__u8 entry_size;
	
__u16 entry_count;
	
__u8 entry[16390];
} 
__packed;


struct dasd_psf_query_host_access {
	
__u8 access_flag;
	
__u8 version;
	
__u16 CKD_length;
	
__u16 SCSI_length;
	
__u8 unused[10];
	
__u8 host_access_information[16394];
} 
__packed;

/*
 * Perform Subsystem Function - Prepare for Read Subsystem Data
 */

struct dasd_psf_prssd_data {
	
unsigned char order;
	
unsigned char flags;
	
unsigned char reserved1;
	
unsigned char reserved2;
	
unsigned char lss;
	
unsigned char volume;
	
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_conf_data {
	
struct dasd_ned neds[5];
	
u8 reserved[64];
	
struct dasd_gneq gneq;
} 
__packed;


struct dasd_eckd_private {
	
struct dasd_eckd_characteristics rdc_data;
	
u8 *conf_data;
	
int conf_len;
	/* per path configuration data */
	
struct dasd_conf_data *path_conf_data[8];
	/* 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;
	
char suc_reason;
};



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 work_struct *);
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 */
Overall Contributors
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linus torvalds
linus torvalds
872
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4
13.79%
stefan weinhuber
stefan weinhuber
735
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10
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stefan haberland
stefan haberland
344
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7
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martin schwidefsky
martin schwidefsky
135
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3
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horst hummel
horst hummel
47
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jan hoppner
jan hoppner
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heiko carstens
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Directory: drivers/s390/block

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