xref: /linux/drivers/s390/block/dasd_eckd.h (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4  *		    Horst Hummel <Horst.Hummel@de.ibm.com>
5  * Bugreports.to..: <Linux390@de.ibm.com>
6  * Copyright IBM Corp. 1999, 2000
7  *
8  */
9 
10 #ifndef DASD_ECKD_H
11 #define DASD_ECKD_H
12 
13 /*****************************************************************************
14  * SECTION: CCW Definitions
15  ****************************************************************************/
16 #define DASD_ECKD_CCW_NOP		 0x03
17 #define DASD_ECKD_CCW_WRITE		 0x05
18 #define DASD_ECKD_CCW_READ		 0x06
19 #define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09
20 #define DASD_ECKD_CCW_READ_HOME_ADDRESS	 0x0a
21 #define DASD_ECKD_CCW_WRITE_KD		 0x0d
22 #define DASD_ECKD_CCW_READ_KD		 0x0e
23 #define DASD_ECKD_CCW_ERASE		 0x11
24 #define DASD_ECKD_CCW_READ_COUNT	 0x12
25 #define DASD_ECKD_CCW_SLCK		 0x14
26 #define DASD_ECKD_CCW_WRITE_RECORD_ZERO	 0x15
27 #define DASD_ECKD_CCW_READ_RECORD_ZERO	 0x16
28 #define DASD_ECKD_CCW_WRITE_CKD		 0x1d
29 #define DASD_ECKD_CCW_READ_CKD		 0x1e
30 #define DASD_ECKD_CCW_PSF		 0x27
31 #define DASD_ECKD_CCW_SNID		 0x34
32 #define DASD_ECKD_CCW_RSSD		 0x3e
33 #define DASD_ECKD_CCW_LOCATE_RECORD	 0x47
34 #define DASD_ECKD_CCW_LOCATE_RECORD_EXT	 0x4b
35 #define DASD_ECKD_CCW_SNSS		 0x54
36 #define DASD_ECKD_CCW_DEFINE_EXTENT	 0x63
37 #define DASD_ECKD_CCW_WRITE_MT		 0x85
38 #define DASD_ECKD_CCW_READ_MT		 0x86
39 #define DASD_ECKD_CCW_WRITE_KD_MT	 0x8d
40 #define DASD_ECKD_CCW_READ_KD_MT	 0x8e
41 #define DASD_ECKD_CCW_READ_COUNT_MT	 0x92
42 #define DASD_ECKD_CCW_RELEASE		 0x94
43 #define DASD_ECKD_CCW_WRITE_FULL_TRACK	 0x95
44 #define DASD_ECKD_CCW_READ_CKD_MT	 0x9e
45 #define DASD_ECKD_CCW_WRITE_CKD_MT	 0x9d
46 #define DASD_ECKD_CCW_WRITE_TRACK_DATA	 0xA5
47 #define DASD_ECKD_CCW_READ_TRACK_DATA	 0xA6
48 #define DASD_ECKD_CCW_RESERVE		 0xB4
49 #define DASD_ECKD_CCW_READ_TRACK	 0xDE
50 #define DASD_ECKD_CCW_PFX		 0xE7
51 #define DASD_ECKD_CCW_PFX_READ		 0xEA
52 #define DASD_ECKD_CCW_RSCK		 0xF9
53 #define DASD_ECKD_CCW_RCD		 0xFA
54 #define DASD_ECKD_CCW_DSO		 0xF7
55 
56 /* Define Subsystem Function / Orders */
57 #define DSO_ORDER_RAS			 0x81
58 
59 /*
60  * Perform Subsystem Function / Orders
61  */
62 #define PSF_ORDER_PRSSD			 0x18
63 #define PSF_ORDER_CUIR_RESPONSE		 0x1A
64 #define PSF_ORDER_SSC			 0x1D
65 
66 /*
67  * Perform Subsystem Function / Sub-Orders
68  */
69 #define PSF_SUBORDER_QHA		 0x1C /* Query Host Access */
70 #define PSF_SUBORDER_PPRCEQ		 0x50 /* PPRC Extended Query */
71 #define PSF_SUBORDER_VSQ		 0x52 /* Volume Storage Query */
72 #define PSF_SUBORDER_LCQ		 0x53 /* Logical Configuration Query */
73 
74 /*
75  * PPRC Extended Query Scopes
76  */
77 #define PPRCEQ_SCOPE_4			 0x04 /* Scope 4 for PPRC Extended Query */
78 
79 /*
80  * CUIR response condition codes
81  */
82 #define PSF_CUIR_INVALID		 0x00
83 #define PSF_CUIR_COMPLETED		 0x01
84 #define PSF_CUIR_NOT_SUPPORTED		 0x02
85 #define PSF_CUIR_ERROR_IN_REQ		 0x03
86 #define PSF_CUIR_DENIED			 0x04
87 #define PSF_CUIR_LAST_PATH		 0x05
88 #define PSF_CUIR_DEVICE_ONLINE		 0x06
89 #define PSF_CUIR_VARY_FAILURE		 0x07
90 #define PSF_CUIR_SOFTWARE_FAILURE	 0x08
91 #define PSF_CUIR_NOT_RECOGNIZED		 0x09
92 
93 /*
94  * CUIR codes
95  */
96 #define CUIR_QUIESCE			 0x01
97 #define CUIR_RESUME			 0x02
98 
99 /*
100  * Out-of-space (OOS) Codes
101  */
102 #define REPO_WARN			 0x01
103 #define REPO_EXHAUST			 0x02
104 #define POOL_WARN			 0x03
105 #define POOL_EXHAUST			 0x04
106 #define REPO_RELIEVE			 0x05
107 #define POOL_RELIEVE			 0x06
108 
109 /*
110  * attention message definitions
111  */
112 #define ATTENTION_LENGTH_CUIR		 0x0e
113 #define ATTENTION_FORMAT_CUIR		 0x01
114 #define ATTENTION_LENGTH_OOS		 0x10
115 #define ATTENTION_FORMAT_OOS		 0x06
116 
117 #define DASD_ECKD_PG_GROUPED		 0x10
118 
119 /*
120  * Size that is reported for large volumes in the old 16-bit no_cyl field
121  */
122 #define LV_COMPAT_CYL 0xFFFE
123 
124 
125 #define FCX_MAX_DATA_FACTOR 65536
126 #define DASD_ECKD_RCD_DATA_SIZE 256
127 
128 #define DASD_ECKD_PATH_THRHLD		 256
129 #define DASD_ECKD_PATH_INTERVAL		 300
130 
131 /*
132  * Maximum number of blocks to be chained
133  */
134 #define DASD_ECKD_MAX_BLOCKS		 190
135 #define DASD_ECKD_MAX_BLOCKS_RAW	 256
136 
137 /*****************************************************************************
138  * SECTION: Type Definitions
139  ****************************************************************************/
140 
141 struct eckd_count {
142 	__u16 cyl;
143 	__u16 head;
144 	__u8 record;
145 	__u8 kl;
146 	__u16 dl;
147 } __attribute__ ((packed));
148 
149 struct ch_t {
150 	__u16 cyl;
151 	__u16 head;
152 } __attribute__ ((packed));
153 
154 struct chr_t {
155 	__u16 cyl;
156 	__u16 head;
157 	__u8 record;
158 } __attribute__ ((packed));
159 
160 struct DE_eckd_data {
161 	struct {
162 		unsigned char perm:2;	/* Permissions on this extent */
163 		unsigned char reserved:1;
164 		unsigned char seek:2;	/* Seek control */
165 		unsigned char auth:2;	/* Access authorization */
166 		unsigned char pci:1;	/* PCI Fetch mode */
167 	} __attribute__ ((packed)) mask;
168 	struct {
169 		unsigned char mode:2;	/* Architecture mode */
170 		unsigned char ckd:1;	/* CKD Conversion */
171 		unsigned char operation:3;	/* Operation mode */
172 		unsigned char cfw:1;	/* Cache fast write */
173 		unsigned char dfw:1;	/* DASD fast write */
174 	} __attribute__ ((packed)) attributes;
175 	__u16 blk_size;		/* Blocksize */
176 	__u16 fast_write_id;
177 	__u8 ga_additional;	/* Global Attributes Additional */
178 	__u8 ga_extended;	/* Global Attributes Extended	*/
179 	struct ch_t beg_ext;
180 	struct ch_t end_ext;
181 	unsigned long ep_sys_time; /* Ext Parameter - System Time Stamp */
182 	__u8 ep_format;        /* Extended Parameter format byte       */
183 	__u8 ep_prio;          /* Extended Parameter priority I/O byte */
184 	__u8 ep_reserved1;     /* Extended Parameter Reserved	       */
185 	__u8 ep_rec_per_track; /* Number of records on a track	       */
186 	__u8 ep_reserved[4];   /* Extended Parameter Reserved	       */
187 } __attribute__ ((packed));
188 
189 struct LO_eckd_data {
190 	struct {
191 		unsigned char orientation:2;
192 		unsigned char operation:6;
193 	} __attribute__ ((packed)) operation;
194 	struct {
195 		unsigned char last_bytes_used:1;
196 		unsigned char reserved:6;
197 		unsigned char read_count_suffix:1;
198 	} __attribute__ ((packed)) auxiliary;
199 	__u8 unused;
200 	__u8 count;
201 	struct ch_t seek_addr;
202 	struct chr_t search_arg;
203 	__u8 sector;
204 	__u16 length;
205 } __attribute__ ((packed));
206 
207 struct LRE_eckd_data {
208 	struct {
209 		unsigned char orientation:2;
210 		unsigned char operation:6;
211 	} __attribute__ ((packed)) operation;
212 	struct {
213 		unsigned char length_valid:1;
214 		unsigned char length_scope:1;
215 		unsigned char imbedded_ccw_valid:1;
216 		unsigned char check_bytes:2;
217 		unsigned char imbedded_count_valid:1;
218 		unsigned char reserved:1;
219 		unsigned char read_count_suffix:1;
220 	} __attribute__ ((packed)) auxiliary;
221 	__u8 imbedded_ccw;
222 	__u8 count;
223 	struct ch_t seek_addr;
224 	struct chr_t search_arg;
225 	__u8 sector;
226 	__u16 length;
227 	__u8 imbedded_count;
228 	__u8 extended_operation;
229 	__u16 extended_parameter_length;
230 	__u8 extended_parameter[];
231 } __attribute__ ((packed));
232 
233 /* Prefix data for format 0x00 and 0x01 */
234 struct PFX_eckd_data {
235 	unsigned char format;
236 	struct {
237 		unsigned char define_extent:1;
238 		unsigned char time_stamp:1;
239 		unsigned char verify_base:1;
240 		unsigned char hyper_pav:1;
241 		unsigned char reserved:4;
242 	} __attribute__ ((packed)) validity;
243 	__u8 base_address;
244 	__u8 aux;
245 	__u8 base_lss;
246 	__u8 reserved[7];
247 	struct DE_eckd_data define_extent;
248 	struct LRE_eckd_data locate_record;
249 } __attribute__ ((packed));
250 
251 struct dasd_eckd_characteristics {
252 	__u16 cu_type;
253 	struct {
254 		unsigned char support:2;
255 		unsigned char async:1;
256 		unsigned char reserved:1;
257 		unsigned char cache_info:1;
258 		unsigned char model:3;
259 	} __attribute__ ((packed)) cu_model;
260 	__u16 dev_type;
261 	__u8 dev_model;
262 	struct {
263 		unsigned char mult_burst:1;
264 		unsigned char RT_in_LR:1;
265 		unsigned char reserved1:1;
266 		unsigned char RD_IN_LR:1;
267 		unsigned char reserved2:4;
268 		unsigned char reserved3:8;
269 		unsigned char defect_wr:1;
270 		unsigned char XRC_supported:1;
271 		unsigned char PPRC_enabled:1;
272 		unsigned char striping:1;
273 		unsigned char reserved5:4;
274 		unsigned char cfw:1;
275 		unsigned char reserved6:2;
276 		unsigned char cache:1;
277 		unsigned char dual_copy:1;
278 		unsigned char dfw:1;
279 		unsigned char reset_alleg:1;
280 		unsigned char sense_down:1;
281 	} __attribute__ ((packed)) facilities;
282 	__u8 dev_class;
283 	__u8 unit_type;
284 	__u16 no_cyl;
285 	__u16 trk_per_cyl;
286 	__u8 sec_per_trk;
287 	__u8 byte_per_track[3];
288 	__u16 home_bytes;
289 	__u8 formula;
290 	union {
291 		struct {
292 			__u8 f1;
293 			__u16 f2;
294 			__u16 f3;
295 		} __attribute__ ((packed)) f_0x01;
296 		struct {
297 			__u8 f1;
298 			__u8 f2;
299 			__u8 f3;
300 			__u8 f4;
301 			__u8 f5;
302 		} __attribute__ ((packed)) f_0x02;
303 	} __attribute__ ((packed)) factors;
304 	__u16 first_alt_trk;
305 	__u16 no_alt_trk;
306 	__u16 first_dia_trk;
307 	__u16 no_dia_trk;
308 	__u16 first_sup_trk;
309 	__u16 no_sup_trk;
310 	__u8 MDR_ID;
311 	__u8 OBR_ID;
312 	__u8 director;
313 	__u8 rd_trk_set;
314 	__u16 max_rec_zero;
315 	__u8 reserved1;
316 	__u8 RWANY_in_LR;
317 	__u8 factor6;
318 	__u8 factor7;
319 	__u8 factor8;
320 	__u8 reserved2[3];
321 	__u8 reserved3[6];
322 	__u32 long_no_cyl;
323 } __attribute__ ((packed));
324 
325 /* elements of the configuration data */
326 struct dasd_ned {
327 	struct {
328 		__u8 identifier:2;
329 		__u8 token_id:1;
330 		__u8 sno_valid:1;
331 		__u8 subst_sno:1;
332 		__u8 recNED:1;
333 		__u8 emuNED:1;
334 		__u8 reserved:1;
335 	} __attribute__ ((packed)) flags;
336 	__u8 descriptor;
337 	__u8 dev_class;
338 	__u8 reserved;
339 	__u8 dev_type[6];
340 	__u8 dev_model[3];
341 	__u8 HDA_manufacturer[3];
342 	struct {
343 		__u8 HDA_location[2];
344 		__u8 HDA_seqno[12];
345 	} serial;
346 	__u8 ID;
347 	__u8 unit_addr;
348 } __attribute__ ((packed));
349 
350 struct dasd_sneq {
351 	struct {
352 		__u8 identifier:2;
353 		__u8 reserved:6;
354 	} __attribute__ ((packed)) flags;
355 	__u8 res1;
356 	__u16 format;
357 	__u8 res2[4];		/* byte  4- 7 */
358 	__u8 sua_flags;		/* byte  8    */
359 	__u8 base_unit_addr;	/* byte  9    */
360 	__u8 res3[22];		/* byte 10-31 */
361 } __attribute__ ((packed));
362 
363 struct vd_sneq {
364 	struct {
365 		__u8 identifier:2;
366 		__u8 reserved:6;
367 	} __attribute__ ((packed)) flags;
368 	__u8 res1;
369 	__u16 format;
370 	__u8 res2[4];	/* byte  4- 7 */
371 	__u8 uit[16];	/* byte  8-23 */
372 	__u8 res3[8];	/* byte 24-31 */
373 } __attribute__ ((packed));
374 
375 struct dasd_gneq {
376 	struct {
377 		__u8 identifier:2;
378 		__u8 reserved:6;
379 	} __attribute__ ((packed)) flags;
380 	__u8 record_selector;
381 	__u8 reserved[4];
382 	struct {
383 		__u8 value:2;
384 		__u8 number:6;
385 	} __attribute__ ((packed)) timeout;
386 	__u8 reserved3;
387 	__u16 subsystemID;
388 	__u8 reserved2[22];
389 } __attribute__ ((packed));
390 
391 struct dasd_rssd_features {
392 	char feature[256];
393 } __attribute__((packed));
394 
395 struct dasd_rssd_messages {
396 	__u16 length;
397 	__u8 format;
398 	__u8 code;
399 	__u32 message_id;
400 	__u8 flags;
401 	char messages[4087];
402 } __packed;
403 
404 /*
405  * Read Subsystem Data - Volume Storage Query
406  */
407 struct dasd_rssd_vsq {
408 	struct {
409 		__u8 tse:1;
410 		__u8 space_not_available:1;
411 		__u8 ese:1;
412 		__u8 unused:5;
413 	} __packed vol_info;
414 	__u8 unused1;
415 	__u16 extent_pool_id;
416 	__u8 warn_cap_limit;
417 	__u8 warn_cap_guaranteed;
418 	__u16 unused2;
419 	__u32 limit_capacity;
420 	__u32 guaranteed_capacity;
421 	__u32 space_allocated;
422 	__u32 space_configured;
423 	__u32 logical_capacity;
424 } __packed;
425 
426 /*
427  * Extent Pool Summary
428  */
429 struct dasd_ext_pool_sum {
430 	__u16 pool_id;
431 	__u8 repo_warn_thrshld;
432 	__u8 warn_thrshld;
433 	struct {
434 		__u8 type:1;			/* 0 - CKD / 1 - FB */
435 		__u8 track_space_efficient:1;
436 		__u8 extent_space_efficient:1;
437 		__u8 standard_volume:1;
438 		__u8 extent_size_valid:1;
439 		__u8 capacity_at_warnlevel:1;
440 		__u8 pool_oos:1;
441 		__u8 unused0:1;
442 		__u8 unused1;
443 	} __packed flags;
444 	struct {
445 		__u8 reserved0:1;
446 		__u8 size_1G:1;
447 		__u8 reserved1:5;
448 		__u8 size_16M:1;
449 	} __packed extent_size;
450 	__u8 unused;
451 } __packed;
452 
453 /*
454  * Read Subsystem Data-Response - Logical Configuration Query - Header
455  */
456 struct dasd_rssd_lcq {
457 	__u16 data_length;		/* Length of data returned */
458 	__u16 pool_count;		/* Count of extent pools returned - Max: 448 */
459 	struct {
460 		__u8 pool_info_valid:1;	/* Detailed Information valid */
461 		__u8 pool_id_volume:1;
462 		__u8 pool_id_cec:1;
463 		__u8 unused0:5;
464 		__u8 unused1;
465 	} __packed header_flags;
466 	char sfi_type[6];		/* Storage Facility Image Type (EBCDIC) */
467 	char sfi_model[3];		/* Storage Facility Image Model (EBCDIC) */
468 	__u8 sfi_seq_num[10];		/* Storage Facility Image Sequence Number */
469 	__u8 reserved[7];
470 	struct dasd_ext_pool_sum ext_pool_sum[448];
471 } __packed;
472 
473 struct dasd_oos_message {
474 	__u16 length;
475 	__u8 format;
476 	__u8 code;
477 	__u8 percentage_empty;
478 	__u8 reserved;
479 	__u16 ext_pool_id;
480 	__u16 token;
481 	__u8 unused[6];
482 } __packed;
483 
484 struct dasd_cuir_message {
485 	__u16 length;
486 	__u8 format;
487 	__u8 code;
488 	__u32 message_id;
489 	__u8 flags;
490 	__u8 neq_map[3];
491 	__u8 ned_map;
492 	__u8 record_selector;
493 } __packed;
494 
495 struct dasd_psf_cuir_response {
496 	__u8 order;
497 	__u8 flags;
498 	__u8 cc;
499 	__u8 chpid;
500 	__u16 device_nr;
501 	__u16 reserved;
502 	__u32 message_id;
503 	__u64 system_id;
504 	__u8 cssid;
505 	__u8 ssid;
506 } __packed;
507 
508 struct dasd_ckd_path_group_entry {
509 	__u8 status_flags;
510 	__u8 pgid[11];
511 	__u8 sysplex_name[8];
512 	__u32 timestamp;
513 	__u32 cylinder;
514 	__u8 reserved[4];
515 } __packed;
516 
517 struct dasd_ckd_host_information {
518 	__u8 access_flags;
519 	__u8 entry_size;
520 	__u16 entry_count;
521 	__u8 entry[16390];
522 } __packed;
523 
524 struct dasd_psf_query_host_access {
525 	__u8 access_flag;
526 	__u8 version;
527 	__u16 CKD_length;
528 	__u16 SCSI_length;
529 	__u8 unused[10];
530 	__u8 host_access_information[16394];
531 } __packed;
532 
533 /*
534  * Perform Subsystem Function - Prepare for Read Subsystem Data
535  */
536 struct dasd_psf_prssd_data {
537 	unsigned char order;
538 	unsigned char flags;
539 	unsigned char reserved1;
540 	unsigned char reserved2;
541 	unsigned char lss;
542 	unsigned char volume;
543 	unsigned char suborder;
544 	unsigned char varies[5];
545 } __attribute__ ((packed));
546 
547 /*
548  * Perform Subsystem Function - Set Subsystem Characteristics
549  */
550 struct dasd_psf_ssc_data {
551 	unsigned char order;
552 	unsigned char flags;
553 	unsigned char cu_type[4];
554 	unsigned char suborder;
555 	unsigned char reserved[59];
556 } __attribute__((packed));
557 
558 /* Maximum number of extents for a single Release Allocated Space command */
559 #define DASD_ECKD_RAS_EXTS_MAX		110U
560 
561 struct dasd_dso_ras_ext_range {
562 	struct ch_t beg_ext;
563 	struct ch_t end_ext;
564 } __packed;
565 
566 /*
567  * Define Subsystem Operation - Release Allocated Space
568  */
569 struct dasd_dso_ras_data {
570 	__u8 order;
571 	struct {
572 		__u8 message:1;		/* Must be zero */
573 		__u8 reserved1:2;
574 		__u8 vol_type:1;	/* 0 - CKD/FBA, 1 - FB */
575 		__u8 reserved2:4;
576 	} __packed flags;
577 	/* Operation Flags to specify scope */
578 	struct {
579 		__u8 reserved1:2;
580 		/* Release Space by Extent */
581 		__u8 by_extent:1;	/* 0 - entire volume, 1 - specified extents */
582 		__u8 guarantee_init:1;
583 		__u8 force_release:1;	/* Internal - will be ignored */
584 		__u16 reserved2:11;
585 	} __packed op_flags;
586 	__u8 lss;
587 	__u8 dev_addr;
588 	__u32 reserved1;
589 	__u8 reserved2[10];
590 	__u16 nr_exts;			/* Defines number of ext_scope - max 110 */
591 	__u16 reserved3;
592 } __packed;
593 
594 
595 /*
596  * some structures and definitions for alias handling
597  */
598 struct dasd_unit_address_configuration {
599 	struct {
600 		char ua_type;
601 		char base_ua;
602 	} unit[256];
603 } __attribute__((packed));
604 
605 
606 #define MAX_DEVICES_PER_LCU 256
607 
608 /* flags on the LCU  */
609 #define NEED_UAC_UPDATE  0x01
610 #define UPDATE_PENDING	0x02
611 
612 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
613 
614 
615 struct alias_root {
616 	struct list_head serverlist;
617 	spinlock_t lock;
618 };
619 
620 struct alias_server {
621 	struct list_head server;
622 	struct dasd_uid uid;
623 	struct list_head lculist;
624 };
625 
626 struct summary_unit_check_work_data {
627 	char reason;
628 	struct dasd_device *device;
629 	struct work_struct worker;
630 };
631 
632 struct read_uac_work_data {
633 	struct dasd_device *device;
634 	struct delayed_work dwork;
635 };
636 
637 struct alias_lcu {
638 	struct list_head lcu;
639 	struct dasd_uid uid;
640 	enum pavtype pav;
641 	char flags;
642 	spinlock_t lock;
643 	struct list_head grouplist;
644 	struct list_head active_devices;
645 	struct list_head inactive_devices;
646 	struct dasd_unit_address_configuration *uac;
647 	struct summary_unit_check_work_data suc_data;
648 	struct read_uac_work_data ruac_data;
649 	struct dasd_ccw_req *rsu_cqr;
650 	struct completion lcu_setup;
651 };
652 
653 struct alias_pav_group {
654 	struct list_head group;
655 	struct dasd_uid uid;
656 	struct alias_lcu *lcu;
657 	struct list_head baselist;
658 	struct list_head aliaslist;
659 	struct dasd_device *next;
660 };
661 
662 struct dasd_conf_data {
663 	struct dasd_ned neds[5];
664 	u8 reserved[64];
665 	struct dasd_gneq gneq;
666 } __packed;
667 
668 struct dasd_conf {
669 	u8 *data;
670 	int len;
671 	/* pointers to specific parts in the conf_data */
672 	struct dasd_ned *ned;
673 	struct dasd_sneq *sneq;
674 	struct vd_sneq *vdsneq;
675 	struct dasd_gneq *gneq;
676 };
677 
678 struct dasd_eckd_private {
679 	struct dasd_eckd_characteristics rdc_data;
680 	struct dasd_conf conf;
681 
682 	struct eckd_count count_area[5];
683 	int init_cqr_status;
684 	int uses_cdl;
685 	struct attrib_data_t attrib;	/* e.g. cache operations */
686 	struct dasd_rssd_features features;
687 	struct dasd_rssd_vsq vsq;
688 	struct dasd_ext_pool_sum eps;
689 	u32 real_cyl;
690 
691 	/* alias management */
692 	struct dasd_uid uid;
693 	struct alias_pav_group *pavgroup;
694 	struct alias_lcu *lcu;
695 	int count;
696 
697 	u32 fcx_max_data;
698 	char suc_reason;
699 };
700 
701 
702 
703 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
704 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
705 int dasd_alias_add_device(struct dasd_device *);
706 int dasd_alias_remove_device(struct dasd_device *);
707 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
708 void dasd_alias_handle_summary_unit_check(struct work_struct *);
709 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
710 int dasd_alias_update_add_device(struct dasd_device *);
711 #endif				/* DASD_ECKD_H */
712