[mirror_ubuntu-zesty-kernel.git] / 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_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 */
Commit	Line	Data
138c014d	1	/*
1da177e4	2	* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d	3	* Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4	4	* Bugreports.to..: <Linux390@de.ibm.com>
a53c8fab	5	* Copyright IBM Corp. 1999, 2000
1da177e4	6	*
1da177e4 LT	7	*/
	8
	9	#ifndef DASD_ECKD_H
	10	#define DASD_ECKD_H
	11
	12	/*****************************************************************************
	13	* SECTION: CCW Definitions
	14	****************************************************************************/
	15	#define DASD_ECKD_CCW_WRITE 0x05
	16	#define DASD_ECKD_CCW_READ 0x06
	17	#define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09
	18	#define DASD_ECKD_CCW_READ_HOME_ADDRESS 0x0a
	19	#define DASD_ECKD_CCW_WRITE_KD 0x0d
	20	#define DASD_ECKD_CCW_READ_KD 0x0e
	21	#define DASD_ECKD_CCW_ERASE 0x11
	22	#define DASD_ECKD_CCW_READ_COUNT 0x12
	23	#define DASD_ECKD_CCW_SLCK 0x14
	24	#define DASD_ECKD_CCW_WRITE_RECORD_ZERO 0x15
	25	#define DASD_ECKD_CCW_READ_RECORD_ZERO 0x16
	26	#define DASD_ECKD_CCW_WRITE_CKD 0x1d
	27	#define DASD_ECKD_CCW_READ_CKD 0x1e
	28	#define DASD_ECKD_CCW_PSF 0x27
196339f1	29	#define DASD_ECKD_CCW_SNID 0x34
1da177e4 LT	30	#define DASD_ECKD_CCW_RSSD 0x3e
1da177e4 LT	31	#define DASD_ECKD_CCW_LOCATE_RECORD 0x47
20c64468	32	#define DASD_ECKD_CCW_SNSS 0x54
1da177e4 LT	33	#define DASD_ECKD_CCW_DEFINE_EXTENT 0x63
	34	#define DASD_ECKD_CCW_WRITE_MT 0x85
	35	#define DASD_ECKD_CCW_READ_MT 0x86
	36	#define DASD_ECKD_CCW_WRITE_KD_MT 0x8d
	37	#define DASD_ECKD_CCW_READ_KD_MT 0x8e
	38	#define DASD_ECKD_CCW_RELEASE 0x94
e4dbb0f2	39	#define DASD_ECKD_CCW_WRITE_FULL_TRACK 0x95
1da177e4 LT	40	#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
1da177e4 LT	41	#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
f3eb5384 SW	42	#define DASD_ECKD_CCW_WRITE_TRACK_DATA 0xA5
f3eb5384 SW	43	#define DASD_ECKD_CCW_READ_TRACK_DATA 0xA6
1da177e4	44	#define DASD_ECKD_CCW_RESERVE 0xB4
e4dbb0f2	45	#define DASD_ECKD_CCW_READ_TRACK 0xDE
8e09f215	46	#define DASD_ECKD_CCW_PFX 0xE7
f3eb5384	47	#define DASD_ECKD_CCW_PFX_READ 0xEA
8e09f215	48	#define DASD_ECKD_CCW_RSCK 0xF9
a4d26c6a	49	#define DASD_ECKD_CCW_RCD 0xFA
1da177e4 LT	50
1da177e4 LT	51	/*
40545573	52	* Perform Subsystem Function / Sub-Orders
1da177e4	53	*/
40545573 HH	54	#define PSF_ORDER_PRSSD 0x18
40545573 HH	55	#define PSF_ORDER_SSC 0x1D
1da177e4	56
b44b0ab3 SW	57	/*
	58	* Size that is reportet for large volumes in the old 16-bit no_cyl field
	59	*/
	60	#define LV_COMPAT_CYL 0xFFFE
	61
ef19298b SW	62
ef19298b SW	63	#define FCX_MAX_DATA_FACTOR 65536
a4d26c6a	64	#define DASD_ECKD_RCD_DATA_SIZE 256
ef19298b SW	65
ef19298b SW	66
1da177e4 LT	67	/*****************************************************************************
	68	* SECTION: Type Definitions
	69	****************************************************************************/
	70
	71	struct eckd_count {
	72	__u16 cyl;
	73	__u16 head;
	74	__u8 record;
	75	__u8 kl;
	76	__u16 dl;
	77	} __attribute__ ((packed));
	78
	79	struct ch_t {
	80	__u16 cyl;
	81	__u16 head;
	82	} __attribute__ ((packed));
	83
	84	struct chs_t {
	85	__u16 cyl;
	86	__u16 head;
	87	__u32 sector;
	88	} __attribute__ ((packed));
	89
	90	struct chr_t {
	91	__u16 cyl;
	92	__u16 head;
	93	__u8 record;
	94	} __attribute__ ((packed));
	95
	96	struct geom_t {
	97	__u16 cyl;
	98	__u16 head;
	99	__u32 sector;
	100	} __attribute__ ((packed));
	101
	102	struct eckd_home {
	103	__u8 skip_control[14];
	104	__u16 cell_number;
	105	__u8 physical_addr[3];
	106	__u8 flag;
	107	struct ch_t track_addr;
	108	__u8 reserved;
	109	__u8 key_length;
	110	__u8 reserved2[2];
	111	} __attribute__ ((packed));
	112
	113	struct DE_eckd_data {
	114	struct {
	115	unsigned char perm:2; /* Permissions on this extent */
	116	unsigned char reserved:1;
	117	unsigned char seek:2; /* Seek control */
	118	unsigned char auth:2; /* Access authorization */
	119	unsigned char pci:1; /* PCI Fetch mode */
	120	} __attribute__ ((packed)) mask;
	121	struct {
	122	unsigned char mode:2; /* Architecture mode */
	123	unsigned char ckd:1; /* CKD Conversion */
	124	unsigned char operation:3; /* Operation mode */
	125	unsigned char cfw:1; /* Cache fast write */
	126	unsigned char dfw:1; /* DASD fast write */
	127	} __attribute__ ((packed)) attributes;
	128	__u16 blk_size; /* Blocksize */
	129	__u16 fast_write_id;
	130	__u8 ga_additional; /* Global Attributes Additional */
131	__u8 ga_extended; /* Global Attributes Extended */
132	struct ch_t beg_ext;
133	struct ch_t end_ext;
134	unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
135	__u8 ep_format; /* Extended Parameter format byte */
136	__u8 ep_prio; /* Extended Parameter priority I/O byte */
f3eb5384 SW	137	__u8 ep_reserved1; /* Extended Parameter Reserved */
	138	__u8 ep_rec_per_track; /* Number of records on a track */
	139	__u8 ep_reserved[4]; /* Extended Parameter Reserved */
1da177e4 LT	140	} __attribute__ ((packed));
	141
	142	struct LO_eckd_data {
	143	struct {
	144	unsigned char orientation:2;
	145	unsigned char operation:6;
	146	} __attribute__ ((packed)) operation;
	147	struct {
	148	unsigned char last_bytes_used:1;
	149	unsigned char reserved:6;
	150	unsigned char read_count_suffix:1;
	151	} __attribute__ ((packed)) auxiliary;
	152	__u8 unused;
	153	__u8 count;
	154	struct ch_t seek_addr;
	155	struct chr_t search_arg;
	156	__u8 sector;
	157	__u16 length;
	158	} __attribute__ ((packed));
	159
f3eb5384 SW	160	struct LRE_eckd_data {
	161	struct {
	162	unsigned char orientation:2;
	163	unsigned char operation:6;
	164	} __attribute__ ((packed)) operation;
	165	struct {
	166	unsigned char length_valid:1;
	167	unsigned char length_scope:1;
	168	unsigned char imbedded_ccw_valid:1;
	169	unsigned char check_bytes:2;
	170	unsigned char imbedded_count_valid:1;
	171	unsigned char reserved:1;
	172	unsigned char read_count_suffix:1;
	173	} __attribute__ ((packed)) auxiliary;
	174	__u8 imbedded_ccw;
	175	__u8 count;
	176	struct ch_t seek_addr;
	177	struct chr_t search_arg;
	178	__u8 sector;
	179	__u16 length;
	180	__u8 imbedded_count;
	181	__u8 extended_operation;
	182	__u16 extended_parameter_length;
	183	__u8 extended_parameter[0];
	184	} __attribute__ ((packed));
	185
8e09f215 SW	186	/* Prefix data for format 0x00 and 0x01 */
	187	struct PFX_eckd_data {
	188	unsigned char format;
	189	struct {
f3eb5384	190	unsigned char define_extent:1;
8e09f215 SW	191	unsigned char time_stamp:1;
	192	unsigned char verify_base:1;
	193	unsigned char hyper_pav:1;
	194	unsigned char reserved:4;
	195	} __attribute__ ((packed)) validity;
	196	__u8 base_address;
	197	__u8 aux;
	198	__u8 base_lss;
	199	__u8 reserved[7];
f3eb5384 SW	200	struct DE_eckd_data define_extent;
f3eb5384 SW	201	struct LRE_eckd_data locate_record;
8e09f215 SW	202	} __attribute__ ((packed));
8e09f215 SW	203
1da177e4 LT	204	struct dasd_eckd_characteristics {
	205	__u16 cu_type;
	206	struct {
	207	unsigned char support:2;
	208	unsigned char async:1;
	209	unsigned char reserved:1;
	210	unsigned char cache_info:1;
	211	unsigned char model:3;
	212	} __attribute__ ((packed)) cu_model;
	213	__u16 dev_type;
	214	__u8 dev_model;
	215	struct {
	216	unsigned char mult_burst:1;
	217	unsigned char RT_in_LR:1;
	218	unsigned char reserved1:1;
	219	unsigned char RD_IN_LR:1;
	220	unsigned char reserved2:4;
	221	unsigned char reserved3:8;
	222	unsigned char defect_wr:1;
138c014d	223	unsigned char XRC_supported:1;
1da177e4 LT	224	unsigned char reserved4:1;
	225	unsigned char striping:1;
	226	unsigned char reserved5:4;
	227	unsigned char cfw:1;
	228	unsigned char reserved6:2;
	229	unsigned char cache:1;
	230	unsigned char dual_copy:1;
	231	unsigned char dfw:1;
	232	unsigned char reset_alleg:1;
	233	unsigned char sense_down:1;
	234	} __attribute__ ((packed)) facilities;
	235	__u8 dev_class;
	236	__u8 unit_type;
	237	__u16 no_cyl;
	238	__u16 trk_per_cyl;
	239	__u8 sec_per_trk;
	240	__u8 byte_per_track[3];
	241	__u16 home_bytes;
	242	__u8 formula;
	243	union {
	244	struct {
	245	__u8 f1;
	246	__u16 f2;
	247	__u16 f3;
	248	} __attribute__ ((packed)) f_0x01;
	249	struct {
	250	__u8 f1;
	251	__u8 f2;
	252	__u8 f3;
	253	__u8 f4;
	254	__u8 f5;
	255	} __attribute__ ((packed)) f_0x02;
	256	} __attribute__ ((packed)) factors;
	257	__u16 first_alt_trk;
	258	__u16 no_alt_trk;
	259	__u16 first_dia_trk;
	260	__u16 no_dia_trk;
	261	__u16 first_sup_trk;
	262	__u16 no_sup_trk;
	263	__u8 MDR_ID;
	264	__u8 OBR_ID;
	265	__u8 director;
	266	__u8 rd_trk_set;
	267	__u16 max_rec_zero;
	268	__u8 reserved1;
	269	__u8 RWANY_in_LR;
	270	__u8 factor6;
	271	__u8 factor7;
	272	__u8 factor8;
	273	__u8 reserved2[3];
b44b0ab3 SW	274	__u8 reserved3[6];
b44b0ab3 SW	275	__u32 long_no_cyl;
1da177e4 LT	276	} __attribute__ ((packed));
1da177e4 LT	277
4abb08c2 SW	278	/* elements of the configuration data */
4abb08c2 SW	279	struct dasd_ned {
1da177e4	280	struct {
4abb08c2 SW	281	__u8 identifier:2;
	282	__u8 token_id:1;
	283	__u8 sno_valid:1;
	284	__u8 subst_sno:1;
	285	__u8 recNED:1;
	286	__u8 emuNED:1;
	287	__u8 reserved:1;
	288	} __attribute__ ((packed)) flags;
	289	__u8 descriptor;
	290	__u8 dev_class;
	291	__u8 reserved;
	292	__u8 dev_type[6];
	293	__u8 dev_model[3];
	294	__u8 HDA_manufacturer[3];
	295	__u8 HDA_location[2];
	296	__u8 HDA_seqno[12];
	297	__u8 ID;
	298	__u8 unit_addr;
	299	} __attribute__ ((packed));
	300
	301	struct dasd_sneq {
1da177e4	302	struct {
4abb08c2 SW	303	__u8 identifier:2;
	304	__u8 reserved:6;
	305	} __attribute__ ((packed)) flags;
	306	__u8 res1;
	307	__u16 format;
	308	__u8 res2[4]; /* byte 4- 7 */
	309	__u8 sua_flags; /* byte 8 */
	310	__u8 base_unit_addr; /* byte 9 */
	311	__u8 res3[22]; /* byte 10-31 */
	312	} __attribute__ ((packed));
	313
	314	struct vd_sneq {
1da177e4	315	struct {
4abb08c2 SW	316	__u8 identifier:2;
	317	__u8 reserved:6;
	318	} __attribute__ ((packed)) flags;
	319	__u8 res1;
	320	__u16 format;
	321	__u8 res2[4]; /* byte 4- 7 */
	322	__u8 uit[16]; /* byte 8-23 */
	323	__u8 res3[8]; /* byte 24-31 */
	324	} __attribute__ ((packed));
	325
	326	struct dasd_gneq {
1da177e4	327	struct {
4abb08c2 SW	328	__u8 identifier:2;
	329	__u8 reserved:6;
	330	} __attribute__ ((packed)) flags;
7c8faa86 SH	331	__u8 reserved[5];
	332	struct {
	333	__u8 value:2;
	334	__u8 number:6;
	335	} __attribute__ ((packed)) timeout;
	336	__u8 reserved3;
4abb08c2 SW	337	__u16 subsystemID;
4abb08c2 SW	338	__u8 reserved2[22];
1da177e4 LT	339	} __attribute__ ((packed));
1da177e4 LT	340
8e09f215 SW	341	struct dasd_rssd_features {
	342	char feature[256];
	343	} __attribute__((packed));
	344
	345
1da177e4	346	/*
138c014d	347	* Perform Subsystem Function - Prepare for Read Subsystem Data
1da177e4 LT	348	*/
	349	struct dasd_psf_prssd_data {
	350	unsigned char order;
	351	unsigned char flags;
	352	unsigned char reserved[4];
	353	unsigned char suborder;
49fd38bd	354	unsigned char varies[5];
1da177e4 LT	355	} __attribute__ ((packed));
1da177e4 LT	356
40545573 HH	357	/*
	358	* Perform Subsystem Function - Set Subsystem Characteristics
	359	*/
	360	struct dasd_psf_ssc_data {
	361	unsigned char order;
	362	unsigned char flags;
	363	unsigned char cu_type[4];
	364	unsigned char suborder;
	365	unsigned char reserved[59];
	366	} __attribute__((packed));
	367
8e09f215 SW	368
	369	/*
	370	* some structures and definitions for alias handling
	371	*/
	372	struct dasd_unit_address_configuration {
	373	struct {
	374	char ua_type;
	375	char base_ua;
	376	} unit[256];
	377	} __attribute__((packed));
	378
	379
	380	#define MAX_DEVICES_PER_LCU 256
	381
	382	/* flags on the LCU */
	383	#define NEED_UAC_UPDATE 0x01
	384	#define UPDATE_PENDING 0x02
	385
	386	enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
	387
	388
	389	struct alias_root {
	390	struct list_head serverlist;
	391	spinlock_t lock;
	392	};
	393
	394	struct alias_server {
	395	struct list_head server;
	396	struct dasd_uid uid;
	397	struct list_head lculist;
	398	};
	399
	400	struct summary_unit_check_work_data {
	401	char reason;
	402	struct dasd_device *device;
	403	struct work_struct worker;
	404	};
	405
	406	struct read_uac_work_data {
	407	struct dasd_device *device;
	408	struct delayed_work dwork;
	409	};
	410
	411	struct alias_lcu {
	412	struct list_head lcu;
	413	struct dasd_uid uid;
	414	enum pavtype pav;
	415	char flags;
	416	spinlock_t lock;
	417	struct list_head grouplist;
	418	struct list_head active_devices;
	419	struct list_head inactive_devices;
	420	struct dasd_unit_address_configuration *uac;
	421	struct summary_unit_check_work_data suc_data;
	422	struct read_uac_work_data ruac_data;
	423	struct dasd_ccw_req *rsu_cqr;
f4ac1d02	424	struct completion lcu_setup;
8e09f215 SW	425	};
	426
	427	struct alias_pav_group {
	428	struct list_head group;
	429	struct dasd_uid uid;
	430	struct alias_lcu *lcu;
	431	struct list_head baselist;
	432	struct list_head aliaslist;
	433	struct dasd_device *next;
	434	};
	435
8e09f215 SW	436	struct dasd_eckd_private {
8e09f215 SW	437	struct dasd_eckd_characteristics rdc_data;
4abb08c2 SW	438	u8 *conf_data;
	439	int conf_len;
	440	/* pointers to specific parts in the conf_data */
	441	struct dasd_ned *ned;
	442	struct dasd_sneq *sneq;
	443	struct vd_sneq *vdsneq;
	444	struct dasd_gneq *gneq;
	445
8e09f215 SW	446	struct eckd_count count_area[5];
	447	int init_cqr_status;
	448	int uses_cdl;
	449	struct attrib_data_t attrib; /* e.g. cache operations */
	450	struct dasd_rssd_features features;
b44b0ab3	451	u32 real_cyl;
8e09f215 SW	452
	453	/* alias managemnet */
	454	struct dasd_uid uid;
	455	struct alias_pav_group *pavgroup;
	456	struct alias_lcu *lcu;
	457	int count;
ef19298b SW	458
ef19298b SW	459	u32 fcx_max_data;
8e09f215 SW	460	};
	461
	462
	463
	464	int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
	465	void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
	466	int dasd_alias_add_device(struct dasd_device *);
	467	int dasd_alias_remove_device(struct dasd_device *);
	468	struct dasd_device dasd_alias_get_start_dev(struct dasd_device );
	469	void dasd_alias_handle_summary_unit_check(struct dasd_device , struct irb );
	470	void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
f4ac1d02 SW	471	void dasd_alias_lcu_setup_complete(struct dasd_device *);
f4ac1d02 SW	472	void dasd_alias_wait_for_lcu_setup(struct dasd_device *);
501183f2	473	int dasd_alias_update_add_device(struct dasd_device *);
1da177e4	474	#endif /* DASD_ECKD_H */