[linux-2.6-block.git] / drivers / s390 / block / dasd_eckd.h

/*
 * 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_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_READ_CKD_MT	 0x9e
#define DASD_ECKD_CCW_WRITE_CKD_MT	 0x9d
#define DASD_ECKD_CCW_RESERVE		 0xB4
#define DASD_ECKD_CCW_PFX		 0xE7
#define DASD_ECKD_CCW_RSCK		 0xF9

/*
 * Perform Subsystem Function / Sub-Orders
 */
#define PSF_ORDER_PRSSD 0x18
#define PSF_ORDER_SSC	0x1D

/*****************************************************************************
 * 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_reserved[6];   /* 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));

/* Prefix data for format 0x00 and 0x01 */
struct PFX_eckd_data {
	unsigned char format;
	struct {
		unsigned char define_extend: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_extend;
	struct LO_eckd_data locate_record;
	__u8 LO_extended_data[4];
} __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[10];
} __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[7];
	__u16 subsystemID;
	__u8 reserved2[22];
} __attribute__ ((packed));

struct dasd_eckd_path {
	__u8 opm;
	__u8 ppm;
	__u8 npm;
};

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 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 dasd_eckd_path path_data;
	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;

	/* alias managemnet */
	struct dasd_uid uid;
	struct alias_pav_group *pavgroup;
	struct alias_lcu *lcu;
	int count;
};


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 *);

#endif				/* DASD_ECKD_H */
Commit	Line	Data
138c014d	1	/*
1da177e4 LT	2	* File...........: linux/drivers/s390/block/dasd_eckd.h
1da177e4 LT	3	* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d	4	* Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4 LT	5	* Bugreports.to..: <Linux390@de.ibm.com>
	6	* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
	7	*
1da177e4 LT	8	*/
	9
	10	#ifndef DASD_ECKD_H
	11	#define DASD_ECKD_H
	12
	13	/*****************************************************************************
	14	* SECTION: CCW Definitions
	15	****************************************************************************/
	16	#define DASD_ECKD_CCW_WRITE 0x05
	17	#define DASD_ECKD_CCW_READ 0x06
	18	#define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09
	19	#define DASD_ECKD_CCW_READ_HOME_ADDRESS 0x0a
	20	#define DASD_ECKD_CCW_WRITE_KD 0x0d
	21	#define DASD_ECKD_CCW_READ_KD 0x0e
	22	#define DASD_ECKD_CCW_ERASE 0x11
	23	#define DASD_ECKD_CCW_READ_COUNT 0x12
	24	#define DASD_ECKD_CCW_SLCK 0x14
	25	#define DASD_ECKD_CCW_WRITE_RECORD_ZERO 0x15
	26	#define DASD_ECKD_CCW_READ_RECORD_ZERO 0x16
	27	#define DASD_ECKD_CCW_WRITE_CKD 0x1d
	28	#define DASD_ECKD_CCW_READ_CKD 0x1e
	29	#define DASD_ECKD_CCW_PSF 0x27
	30	#define DASD_ECKD_CCW_RSSD 0x3e
	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
	39	#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
	40	#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
	41	#define DASD_ECKD_CCW_RESERVE 0xB4
8e09f215 SW	42	#define DASD_ECKD_CCW_PFX 0xE7
8e09f215 SW	43	#define DASD_ECKD_CCW_RSCK 0xF9
1da177e4 LT	44
1da177e4 LT	45	/*
40545573	46	* Perform Subsystem Function / Sub-Orders
1da177e4	47	*/
40545573 HH	48	#define PSF_ORDER_PRSSD 0x18
40545573 HH	49	#define PSF_ORDER_SSC 0x1D
1da177e4 LT	50
	51	/*****************************************************************************
	52	* SECTION: Type Definitions
	53	****************************************************************************/
	54
	55	struct eckd_count {
	56	__u16 cyl;
	57	__u16 head;
	58	__u8 record;
	59	__u8 kl;
	60	__u16 dl;
	61	} __attribute__ ((packed));
	62
	63	struct ch_t {
	64	__u16 cyl;
	65	__u16 head;
	66	} __attribute__ ((packed));
	67
	68	struct chs_t {
	69	__u16 cyl;
	70	__u16 head;
	71	__u32 sector;
	72	} __attribute__ ((packed));
	73
	74	struct chr_t {
	75	__u16 cyl;
	76	__u16 head;
	77	__u8 record;
	78	} __attribute__ ((packed));
	79
	80	struct geom_t {
	81	__u16 cyl;
	82	__u16 head;
	83	__u32 sector;
	84	} __attribute__ ((packed));
	85
	86	struct eckd_home {
	87	__u8 skip_control[14];
	88	__u16 cell_number;
	89	__u8 physical_addr[3];
	90	__u8 flag;
	91	struct ch_t track_addr;
	92	__u8 reserved;
	93	__u8 key_length;
	94	__u8 reserved2[2];
	95	} __attribute__ ((packed));
	96
	97	struct DE_eckd_data {
	98	struct {
	99	unsigned char perm:2; /* Permissions on this extent */
	100	unsigned char reserved:1;
	101	unsigned char seek:2; /* Seek control */
	102	unsigned char auth:2; /* Access authorization */
	103	unsigned char pci:1; /* PCI Fetch mode */
	104	} __attribute__ ((packed)) mask;
	105	struct {
	106	unsigned char mode:2; /* Architecture mode */
	107	unsigned char ckd:1; /* CKD Conversion */
	108	unsigned char operation:3; /* Operation mode */
	109	unsigned char cfw:1; /* Cache fast write */
	110	unsigned char dfw:1; /* DASD fast write */
	111	} __attribute__ ((packed)) attributes;
	112	__u16 blk_size; /* Blocksize */
	113	__u16 fast_write_id;
114	__u8 ga_additional; /* Global Attributes Additional */
115	__u8 ga_extended; /* Global Attributes Extended */
116	struct ch_t beg_ext;
117	struct ch_t end_ext;
118	unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
119	__u8 ep_format; /* Extended Parameter format byte */
120	__u8 ep_prio; /* Extended Parameter priority I/O byte */
121	__u8 ep_reserved[6]; /* Extended Parameter Reserved */
122	} __attribute__ ((packed));
123
124	struct LO_eckd_data {
125	struct {
126	unsigned char orientation:2;
127	unsigned char operation:6;
128	} __attribute__ ((packed)) operation;
129	struct {
130	unsigned char last_bytes_used:1;
131	unsigned char reserved:6;
132	unsigned char read_count_suffix:1;
133	} __attribute__ ((packed)) auxiliary;
134	__u8 unused;
135	__u8 count;
136	struct ch_t seek_addr;
137	struct chr_t search_arg;
138	__u8 sector;
139	__u16 length;
140	} __attribute__ ((packed));
141
8e09f215 SW	142	/* Prefix data for format 0x00 and 0x01 */
	143	struct PFX_eckd_data {
	144	unsigned char format;
	145	struct {
	146	unsigned char define_extend:1;
	147	unsigned char time_stamp:1;
	148	unsigned char verify_base:1;
	149	unsigned char hyper_pav:1;
	150	unsigned char reserved:4;
	151	} __attribute__ ((packed)) validity;
	152	__u8 base_address;
	153	__u8 aux;
	154	__u8 base_lss;
	155	__u8 reserved[7];
	156	struct DE_eckd_data define_extend;
	157	struct LO_eckd_data locate_record;
	158	__u8 LO_extended_data[4];
	159	} __attribute__ ((packed));
	160
1da177e4 LT	161	struct dasd_eckd_characteristics {
	162	__u16 cu_type;
	163	struct {
	164	unsigned char support:2;
	165	unsigned char async:1;
	166	unsigned char reserved:1;
	167	unsigned char cache_info:1;
	168	unsigned char model:3;
	169	} __attribute__ ((packed)) cu_model;
	170	__u16 dev_type;
	171	__u8 dev_model;
	172	struct {
	173	unsigned char mult_burst:1;
	174	unsigned char RT_in_LR:1;
	175	unsigned char reserved1:1;
	176	unsigned char RD_IN_LR:1;
	177	unsigned char reserved2:4;
	178	unsigned char reserved3:8;
	179	unsigned char defect_wr:1;
138c014d	180	unsigned char XRC_supported:1;
1da177e4 LT	181	unsigned char reserved4:1;
	182	unsigned char striping:1;
	183	unsigned char reserved5:4;
	184	unsigned char cfw:1;
	185	unsigned char reserved6:2;
	186	unsigned char cache:1;
	187	unsigned char dual_copy:1;
	188	unsigned char dfw:1;
	189	unsigned char reset_alleg:1;
	190	unsigned char sense_down:1;
	191	} __attribute__ ((packed)) facilities;
	192	__u8 dev_class;
	193	__u8 unit_type;
	194	__u16 no_cyl;
	195	__u16 trk_per_cyl;
	196	__u8 sec_per_trk;
	197	__u8 byte_per_track[3];
	198	__u16 home_bytes;
	199	__u8 formula;
	200	union {
	201	struct {
	202	__u8 f1;
	203	__u16 f2;
	204	__u16 f3;
	205	} __attribute__ ((packed)) f_0x01;
	206	struct {
	207	__u8 f1;
	208	__u8 f2;
	209	__u8 f3;
	210	__u8 f4;
	211	__u8 f5;
	212	} __attribute__ ((packed)) f_0x02;
	213	} __attribute__ ((packed)) factors;
	214	__u16 first_alt_trk;
	215	__u16 no_alt_trk;
	216	__u16 first_dia_trk;
	217	__u16 no_dia_trk;
	218	__u16 first_sup_trk;
	219	__u16 no_sup_trk;
	220	__u8 MDR_ID;
	221	__u8 OBR_ID;
	222	__u8 director;
	223	__u8 rd_trk_set;
	224	__u16 max_rec_zero;
	225	__u8 reserved1;
	226	__u8 RWANY_in_LR;
	227	__u8 factor6;
	228	__u8 factor7;
	229	__u8 factor8;
	230	__u8 reserved2[3];
	231	__u8 reserved3[10];
	232	} __attribute__ ((packed));
	233
4abb08c2 SW	234	/* elements of the configuration data */
4abb08c2 SW	235	struct dasd_ned {
1da177e4	236	struct {
4abb08c2 SW	237	__u8 identifier:2;
	238	__u8 token_id:1;
	239	__u8 sno_valid:1;
	240	__u8 subst_sno:1;
	241	__u8 recNED:1;
	242	__u8 emuNED:1;
	243	__u8 reserved:1;
	244	} __attribute__ ((packed)) flags;
	245	__u8 descriptor;
	246	__u8 dev_class;
	247	__u8 reserved;
	248	__u8 dev_type[6];
	249	__u8 dev_model[3];
	250	__u8 HDA_manufacturer[3];
	251	__u8 HDA_location[2];
	252	__u8 HDA_seqno[12];
	253	__u8 ID;
	254	__u8 unit_addr;
	255	} __attribute__ ((packed));
	256
	257	struct dasd_sneq {
1da177e4	258	struct {
4abb08c2 SW	259	__u8 identifier:2;
	260	__u8 reserved:6;
	261	} __attribute__ ((packed)) flags;
	262	__u8 res1;
	263	__u16 format;
	264	__u8 res2[4]; /* byte 4- 7 */
	265	__u8 sua_flags; /* byte 8 */
	266	__u8 base_unit_addr; /* byte 9 */
	267	__u8 res3[22]; /* byte 10-31 */
	268	} __attribute__ ((packed));
	269
	270	struct vd_sneq {
1da177e4	271	struct {
4abb08c2 SW	272	__u8 identifier:2;
	273	__u8 reserved:6;
	274	} __attribute__ ((packed)) flags;
	275	__u8 res1;
	276	__u16 format;
	277	__u8 res2[4]; /* byte 4- 7 */
	278	__u8 uit[16]; /* byte 8-23 */
	279	__u8 res3[8]; /* byte 24-31 */
	280	} __attribute__ ((packed));
	281
	282	struct dasd_gneq {
1da177e4	283	struct {
4abb08c2 SW	284	__u8 identifier:2;
	285	__u8 reserved:6;
	286	} __attribute__ ((packed)) flags;
	287	__u8 reserved[7];
	288	__u16 subsystemID;
	289	__u8 reserved2[22];
1da177e4 LT	290	} __attribute__ ((packed));
	291
	292	struct dasd_eckd_path {
	293	__u8 opm;
	294	__u8 ppm;
	295	__u8 npm;
	296	};
	297
8e09f215 SW	298	struct dasd_rssd_features {
	299	char feature[256];
	300	} __attribute__((packed));
	301
	302
1da177e4	303	/*
138c014d	304	* Perform Subsystem Function - Prepare for Read Subsystem Data
1da177e4 LT	305	*/
	306	struct dasd_psf_prssd_data {
	307	unsigned char order;
	308	unsigned char flags;
	309	unsigned char reserved[4];
	310	unsigned char suborder;
49fd38bd	311	unsigned char varies[5];
1da177e4 LT	312	} __attribute__ ((packed));
1da177e4 LT	313
40545573 HH	314	/*
	315	* Perform Subsystem Function - Set Subsystem Characteristics
	316	*/
	317	struct dasd_psf_ssc_data {
	318	unsigned char order;
	319	unsigned char flags;
	320	unsigned char cu_type[4];
	321	unsigned char suborder;
	322	unsigned char reserved[59];
	323	} __attribute__((packed));
	324
8e09f215 SW	325
	326	/*
	327	* some structures and definitions for alias handling
	328	*/
	329	struct dasd_unit_address_configuration {
	330	struct {
	331	char ua_type;
	332	char base_ua;
	333	} unit[256];
	334	} __attribute__((packed));
	335
	336
	337	#define MAX_DEVICES_PER_LCU 256
	338
	339	/* flags on the LCU */
	340	#define NEED_UAC_UPDATE 0x01
	341	#define UPDATE_PENDING 0x02
	342
	343	enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
	344
	345
	346	struct alias_root {
	347	struct list_head serverlist;
	348	spinlock_t lock;
	349	};
	350
	351	struct alias_server {
	352	struct list_head server;
	353	struct dasd_uid uid;
	354	struct list_head lculist;
	355	};
	356
	357	struct summary_unit_check_work_data {
	358	char reason;
	359	struct dasd_device *device;
	360	struct work_struct worker;
	361	};
	362
	363	struct read_uac_work_data {
	364	struct dasd_device *device;
	365	struct delayed_work dwork;
	366	};
	367
	368	struct alias_lcu {
	369	struct list_head lcu;
	370	struct dasd_uid uid;
	371	enum pavtype pav;
	372	char flags;
	373	spinlock_t lock;
	374	struct list_head grouplist;
	375	struct list_head active_devices;
	376	struct list_head inactive_devices;
	377	struct dasd_unit_address_configuration *uac;
	378	struct summary_unit_check_work_data suc_data;
	379	struct read_uac_work_data ruac_data;
	380	struct dasd_ccw_req *rsu_cqr;
	381	};
	382
	383	struct alias_pav_group {
	384	struct list_head group;
	385	struct dasd_uid uid;
	386	struct alias_lcu *lcu;
	387	struct list_head baselist;
	388	struct list_head aliaslist;
389	struct dasd_device *next;
390	};
391
392
393	struct dasd_eckd_private {
394	struct dasd_eckd_characteristics rdc_data;
4abb08c2 SW	395	u8 *conf_data;
	396	int conf_len;
	397	/* pointers to specific parts in the conf_data */
	398	struct dasd_ned *ned;
	399	struct dasd_sneq *sneq;
	400	struct vd_sneq *vdsneq;
	401	struct dasd_gneq *gneq;
	402
8e09f215 SW	403	struct dasd_eckd_path path_data;
	404	struct eckd_count count_area[5];
	405	int init_cqr_status;
	406	int uses_cdl;
	407	struct attrib_data_t attrib; /* e.g. cache operations */
	408	struct dasd_rssd_features features;
	409
	410	/* alias managemnet */
	411	struct dasd_uid uid;
	412	struct alias_pav_group *pavgroup;
	413	struct alias_lcu *lcu;
	414	int count;
	415	};
	416
	417
	418
	419	int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
	420	void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
	421	int dasd_alias_add_device(struct dasd_device *);
	422	int dasd_alias_remove_device(struct dasd_device *);
	423	struct dasd_device dasd_alias_get_start_dev(struct dasd_device );
	424	void dasd_alias_handle_summary_unit_check(struct dasd_device , struct irb );
	425	void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
	426
1da177e4	427	#endif /* DASD_ECKD_H */