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[mirror_ubuntu-zesty-kernel.git] / drivers / s390 / block / dasd_eckd.h
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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
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
8fd57520 38#define DASD_ECKD_CCW_READ_COUNT_MT 0x92
1da177e4 39#define DASD_ECKD_CCW_RELEASE 0x94
e4dbb0f2 40#define DASD_ECKD_CCW_WRITE_FULL_TRACK 0x95
1da177e4
LT		 41#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
42#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
f3eb5384
SW		 43#define DASD_ECKD_CCW_WRITE_TRACK_DATA 0xA5
44#define DASD_ECKD_CCW_READ_TRACK_DATA 0xA6
1da177e4 45#define DASD_ECKD_CCW_RESERVE 0xB4
e4dbb0f2 46#define DASD_ECKD_CCW_READ_TRACK 0xDE
8e09f215 47#define DASD_ECKD_CCW_PFX 0xE7
f3eb5384 48#define DASD_ECKD_CCW_PFX_READ 0xEA
8e09f215 49#define DASD_ECKD_CCW_RSCK 0xF9
a4d26c6a 50#define DASD_ECKD_CCW_RCD 0xFA
1da177e4
LT		 51
52/*
40545573 53 * Perform Subsystem Function / Sub-Orders
1da177e4 54 */
5db8440c
SH		 55#define PSF_ORDER_PRSSD 0x18
56#define PSF_ORDER_CUIR_RESPONSE 0x1A
5a3b7b11 57#define PSF_SUBORDER_QHA 0x1C
5db8440c
SH		 58#define PSF_ORDER_SSC 0x1D
59
60/*
61 * CUIR response condition codes
62 */
63#define PSF_CUIR_INVALID 0x00
64#define PSF_CUIR_COMPLETED 0x01
65#define PSF_CUIR_NOT_SUPPORTED 0x02
66#define PSF_CUIR_ERROR_IN_REQ 0x03
67#define PSF_CUIR_DENIED 0x04
68#define PSF_CUIR_LAST_PATH 0x05
69#define PSF_CUIR_DEVICE_ONLINE 0x06
70#define PSF_CUIR_VARY_FAILURE 0x07
71#define PSF_CUIR_SOFTWARE_FAILURE 0x08
72#define PSF_CUIR_NOT_RECOGNIZED 0x09
73
74/*
75 * CUIR codes
76 */
77#define CUIR_QUIESCE 0x01
78#define CUIR_RESUME 0x02
79
80/*
81 * attention message definitions
82 */
83#define ATTENTION_LENGTH_CUIR 0x0e
84#define ATTENTION_FORMAT_CUIR 0x01
1da177e4 85
5a3b7b11
SH		 86#define DASD_ECKD_PG_GROUPED 0x10
87
b44b0ab3
SW		 88/*
89 * Size that is reportet for large volumes in the old 16-bit no_cyl field
90 */
91#define LV_COMPAT_CYL 0xFFFE
92
ef19298b
SW		 93
94#define FCX_MAX_DATA_FACTOR 65536
a4d26c6a 95#define DASD_ECKD_RCD_DATA_SIZE 256
ef19298b 96
a521b048
SH		 97#define DASD_ECKD_PATH_THRHLD 256
98#define DASD_ECKD_PATH_INTERVAL 300
ef19298b 99
1da177e4
LT		 100/*****************************************************************************
101 * SECTION: Type Definitions
102 ****************************************************************************/
103
104struct eckd_count {
105 __u16 cyl;
106 __u16 head;
107 __u8 record;
108 __u8 kl;
109 __u16 dl;
110} __attribute__ ((packed));
111
112struct ch_t {
113 __u16 cyl;
114 __u16 head;
115} __attribute__ ((packed));
116
117struct chs_t {
118 __u16 cyl;
119 __u16 head;
120 __u32 sector;
121} __attribute__ ((packed));
122
123struct chr_t {
124 __u16 cyl;
125 __u16 head;
126 __u8 record;
127} __attribute__ ((packed));
128
129struct geom_t {
130 __u16 cyl;
131 __u16 head;
132 __u32 sector;
133} __attribute__ ((packed));
134
135struct eckd_home {
136 __u8 skip_control[14];
137 __u16 cell_number;
138 __u8 physical_addr[3];
139 __u8 flag;
140 struct ch_t track_addr;
141 __u8 reserved;
142 __u8 key_length;
143 __u8 reserved2[2];
144} __attribute__ ((packed));
145
146struct DE_eckd_data {
147 struct {
148 unsigned char perm:2; /* Permissions on this extent */
149 unsigned char reserved:1;
150 unsigned char seek:2; /* Seek control */
151 unsigned char auth:2; /* Access authorization */
152 unsigned char pci:1; /* PCI Fetch mode */
153 } __attribute__ ((packed)) mask;
154 struct {
155 unsigned char mode:2; /* Architecture mode */
156 unsigned char ckd:1; /* CKD Conversion */
157 unsigned char operation:3; /* Operation mode */
158 unsigned char cfw:1; /* Cache fast write */
159 unsigned char dfw:1; /* DASD fast write */
160 } __attribute__ ((packed)) attributes;
161 __u16 blk_size; /* Blocksize */
162 __u16 fast_write_id;
163 __u8 ga_additional; /* Global Attributes Additional */
164 __u8 ga_extended; /* Global Attributes Extended */
165 struct ch_t beg_ext;
166 struct ch_t end_ext;
167 unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
168 __u8 ep_format; /* Extended Parameter format byte */
169 __u8 ep_prio; /* Extended Parameter priority I/O byte */
f3eb5384
SW		 170 __u8 ep_reserved1; /* Extended Parameter Reserved */
171 __u8 ep_rec_per_track; /* Number of records on a track */
172 __u8 ep_reserved[4]; /* Extended Parameter Reserved */
1da177e4
LT		 173} __attribute__ ((packed));
174
175struct LO_eckd_data {
176 struct {
177 unsigned char orientation:2;
178 unsigned char operation:6;
179 } __attribute__ ((packed)) operation;
180 struct {
181 unsigned char last_bytes_used:1;
182 unsigned char reserved:6;
183 unsigned char read_count_suffix:1;
184 } __attribute__ ((packed)) auxiliary;
185 __u8 unused;
186 __u8 count;
187 struct ch_t seek_addr;
188 struct chr_t search_arg;
189 __u8 sector;
190 __u16 length;
191} __attribute__ ((packed));
192
f3eb5384
SW		 193struct LRE_eckd_data {
194 struct {
195 unsigned char orientation:2;
196 unsigned char operation:6;
197 } __attribute__ ((packed)) operation;
198 struct {
199 unsigned char length_valid:1;
200 unsigned char length_scope:1;
201 unsigned char imbedded_ccw_valid:1;
202 unsigned char check_bytes:2;
203 unsigned char imbedded_count_valid:1;
204 unsigned char reserved:1;
205 unsigned char read_count_suffix:1;
206 } __attribute__ ((packed)) auxiliary;
207 __u8 imbedded_ccw;
208 __u8 count;
209 struct ch_t seek_addr;
210 struct chr_t search_arg;
211 __u8 sector;
212 __u16 length;
213 __u8 imbedded_count;
214 __u8 extended_operation;
215 __u16 extended_parameter_length;
216 __u8 extended_parameter[0];
217} __attribute__ ((packed));
218
8e09f215
SW		 219/* Prefix data for format 0x00 and 0x01 */
220struct PFX_eckd_data {
221 unsigned char format;
222 struct {
f3eb5384 223 unsigned char define_extent:1;
8e09f215
SW		 224 unsigned char time_stamp:1;
225 unsigned char verify_base:1;
226 unsigned char hyper_pav:1;
227 unsigned char reserved:4;
228 } __attribute__ ((packed)) validity;
229 __u8 base_address;
230 __u8 aux;
231 __u8 base_lss;
232 __u8 reserved[7];
f3eb5384
SW		 233 struct DE_eckd_data define_extent;
234 struct LRE_eckd_data locate_record;
8e09f215
SW		 235} __attribute__ ((packed));
236
1da177e4
LT		 237struct dasd_eckd_characteristics {
238 __u16 cu_type;
239 struct {
240 unsigned char support:2;
241 unsigned char async:1;
242 unsigned char reserved:1;
243 unsigned char cache_info:1;
244 unsigned char model:3;
245 } __attribute__ ((packed)) cu_model;
246 __u16 dev_type;
247 __u8 dev_model;
248 struct {
249 unsigned char mult_burst:1;
250 unsigned char RT_in_LR:1;
251 unsigned char reserved1:1;
252 unsigned char RD_IN_LR:1;
253 unsigned char reserved2:4;
254 unsigned char reserved3:8;
255 unsigned char defect_wr:1;
138c014d 256 unsigned char XRC_supported:1;
1da177e4
LT		 257 unsigned char reserved4:1;
258 unsigned char striping:1;
259 unsigned char reserved5:4;
260 unsigned char cfw:1;
261 unsigned char reserved6:2;
262 unsigned char cache:1;
263 unsigned char dual_copy:1;
264 unsigned char dfw:1;
265 unsigned char reset_alleg:1;
266 unsigned char sense_down:1;
267 } __attribute__ ((packed)) facilities;
268 __u8 dev_class;
269 __u8 unit_type;
270 __u16 no_cyl;
271 __u16 trk_per_cyl;
272 __u8 sec_per_trk;
273 __u8 byte_per_track[3];
274 __u16 home_bytes;
275 __u8 formula;
276 union {
277 struct {
278 __u8 f1;
279 __u16 f2;
280 __u16 f3;
281 } __attribute__ ((packed)) f_0x01;
282 struct {
283 __u8 f1;
284 __u8 f2;
285 __u8 f3;
286 __u8 f4;
287 __u8 f5;
288 } __attribute__ ((packed)) f_0x02;
289 } __attribute__ ((packed)) factors;
290 __u16 first_alt_trk;
291 __u16 no_alt_trk;
292 __u16 first_dia_trk;
293 __u16 no_dia_trk;
294 __u16 first_sup_trk;
295 __u16 no_sup_trk;
296 __u8 MDR_ID;
297 __u8 OBR_ID;
298 __u8 director;
299 __u8 rd_trk_set;
300 __u16 max_rec_zero;
301 __u8 reserved1;
302 __u8 RWANY_in_LR;
303 __u8 factor6;
304 __u8 factor7;
305 __u8 factor8;
306 __u8 reserved2[3];
b44b0ab3
SW		 307 __u8 reserved3[6];
308 __u32 long_no_cyl;
1da177e4
LT		 309} __attribute__ ((packed));
310
4abb08c2
SW		 311/* elements of the configuration data */
312struct dasd_ned {
1da177e4 313 struct {
4abb08c2
SW		 314 __u8 identifier:2;
315 __u8 token_id:1;
316 __u8 sno_valid:1;
317 __u8 subst_sno:1;
318 __u8 recNED:1;
319 __u8 emuNED:1;
320 __u8 reserved:1;
321 } __attribute__ ((packed)) flags;
322 __u8 descriptor;
323 __u8 dev_class;
324 __u8 reserved;
325 __u8 dev_type[6];
326 __u8 dev_model[3];
327 __u8 HDA_manufacturer[3];
328 __u8 HDA_location[2];
329 __u8 HDA_seqno[12];
330 __u8 ID;
331 __u8 unit_addr;
332} __attribute__ ((packed));
333
334struct dasd_sneq {
1da177e4 335 struct {
4abb08c2
SW		 336 __u8 identifier:2;
337 __u8 reserved:6;
338 } __attribute__ ((packed)) flags;
339 __u8 res1;
340 __u16 format;
341 __u8 res2[4]; /* byte 4- 7 */
342 __u8 sua_flags; /* byte 8 */
343 __u8 base_unit_addr; /* byte 9 */
344 __u8 res3[22]; /* byte 10-31 */
345} __attribute__ ((packed));
346
347struct vd_sneq {
1da177e4 348 struct {
4abb08c2
SW		 349 __u8 identifier:2;
350 __u8 reserved:6;
351 } __attribute__ ((packed)) flags;
352 __u8 res1;
353 __u16 format;
354 __u8 res2[4]; /* byte 4- 7 */
355 __u8 uit[16]; /* byte 8-23 */
356 __u8 res3[8]; /* byte 24-31 */
357} __attribute__ ((packed));
358
359struct dasd_gneq {
1da177e4 360 struct {
4abb08c2
SW		 361 __u8 identifier:2;
362 __u8 reserved:6;
363 } __attribute__ ((packed)) flags;
b179b037
SH		 364 __u8 record_selector;
365 __u8 reserved[4];
7c8faa86
SH		 366 struct {
367 __u8 value:2;
368 __u8 number:6;
369 } __attribute__ ((packed)) timeout;
370 __u8 reserved3;
4abb08c2
SW		 371 __u16 subsystemID;
372 __u8 reserved2[22];
1da177e4
LT		 373} __attribute__ ((packed));
374
8e09f215
SW		 375struct dasd_rssd_features {
376 char feature[256];
377} __attribute__((packed));
378
5db8440c
SH		 379struct dasd_rssd_messages {
380 __u16 length;
381 __u8 format;
382 __u8 code;
383 __u32 message_id;
384 __u8 flags;
385 char messages[4087];
386} __packed;
387
388struct dasd_cuir_message {
389 __u16 length;
390 __u8 format;
391 __u8 code;
392 __u32 message_id;
393 __u8 flags;
394 __u8 neq_map[3];
395 __u8 ned_map;
396 __u8 record_selector;
397} __packed;
398
399struct dasd_psf_cuir_response {
400 __u8 order;
401 __u8 flags;
402 __u8 cc;
403 __u8 chpid;
404 __u16 device_nr;
405 __u16 reserved;
406 __u32 message_id;
407 __u64 system_id;
408 __u8 cssid;
409 __u8 ssid;
410} __packed;
8e09f215 411
5a3b7b11
SH		 412struct dasd_ckd_path_group_entry {
413 __u8 status_flags;
414 __u8 pgid[11];
415 __u8 sysplex_name[8];
416 __u32 timestamp;
417 __u32 cylinder;
418 __u8 reserved[4];
419} __packed;
420
421struct dasd_ckd_host_information {
422 __u8 access_flags;
423 __u8 entry_size;
424 __u16 entry_count;
425 __u8 entry[16390];
426} __packed;
427
428struct dasd_psf_query_host_access {
429 __u8 access_flag;
430 __u8 version;
431 __u16 CKD_length;
432 __u16 SCSI_length;
433 __u8 unused[10];
434 __u8 host_access_information[16394];
435} __packed;
436
1da177e4 437/*
138c014d 438 * Perform Subsystem Function - Prepare for Read Subsystem Data
1da177e4
LT		 439 */
440struct dasd_psf_prssd_data {
441 unsigned char order;
442 unsigned char flags;
5a3b7b11
SH		 443 unsigned char reserved1;
444 unsigned char reserved2;
445 unsigned char lss;
446 unsigned char volume;
1da177e4 447 unsigned char suborder;
49fd38bd 448 unsigned char varies[5];
1da177e4
LT		 449} __attribute__ ((packed));
450
40545573
HH		 451/*
452 * Perform Subsystem Function - Set Subsystem Characteristics
453 */
454struct dasd_psf_ssc_data {
455 unsigned char order;
456 unsigned char flags;
457 unsigned char cu_type[4];
458 unsigned char suborder;
459 unsigned char reserved[59];
460} __attribute__((packed));
461
8e09f215
SW		 462
463/*
464 * some structures and definitions for alias handling
465 */
466struct dasd_unit_address_configuration {
467 struct {
468 char ua_type;
469 char base_ua;
470 } unit[256];
471} __attribute__((packed));
472
473
474#define MAX_DEVICES_PER_LCU 256
475
476/* flags on the LCU */
477#define NEED_UAC_UPDATE 0x01
478#define UPDATE_PENDING 0x02
479
480enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
481
482
483struct alias_root {
484 struct list_head serverlist;
485 spinlock_t lock;
486};
487
488struct alias_server {
489 struct list_head server;
490 struct dasd_uid uid;
491 struct list_head lculist;
492};
493
494struct summary_unit_check_work_data {
495 char reason;
496 struct dasd_device *device;
497 struct work_struct worker;
498};
499
500struct read_uac_work_data {
501 struct dasd_device *device;
502 struct delayed_work dwork;
503};
504
505struct alias_lcu {
506 struct list_head lcu;
507 struct dasd_uid uid;
508 enum pavtype pav;
509 char flags;
510 spinlock_t lock;
511 struct list_head grouplist;
512 struct list_head active_devices;
513 struct list_head inactive_devices;
514 struct dasd_unit_address_configuration *uac;
515 struct summary_unit_check_work_data suc_data;
516 struct read_uac_work_data ruac_data;
517 struct dasd_ccw_req *rsu_cqr;
f4ac1d02 518 struct completion lcu_setup;
8e09f215
SW		 519};
520
521struct alias_pav_group {
522 struct list_head group;
523 struct dasd_uid uid;
524 struct alias_lcu *lcu;
525 struct list_head baselist;
526 struct list_head aliaslist;
527 struct dasd_device *next;
528};
529
b179b037
SH		 530struct dasd_conf_data {
531 struct dasd_ned neds[5];
532 u8 reserved[64];
533 struct dasd_gneq gneq;
534} __packed;
535
8e09f215
SW		 536struct dasd_eckd_private {
537 struct dasd_eckd_characteristics rdc_data;
4abb08c2
SW		 538 u8 *conf_data;
539 int conf_len;
c9346151 540
4abb08c2
SW		 541 /* pointers to specific parts in the conf_data */
542 struct dasd_ned *ned;
543 struct dasd_sneq *sneq;
544 struct vd_sneq *vdsneq;
545 struct dasd_gneq *gneq;
546
8e09f215
SW		 547 struct eckd_count count_area[5];
548 int init_cqr_status;
549 int uses_cdl;
550 struct attrib_data_t attrib; /* e.g. cache operations */
551 struct dasd_rssd_features features;
b44b0ab3 552 u32 real_cyl;
8e09f215
SW		 553
554 /* alias managemnet */
555 struct dasd_uid uid;
556 struct alias_pav_group *pavgroup;
557 struct alias_lcu *lcu;
558 int count;
ef19298b
SW		 559
560 u32 fcx_max_data;
59a9ed5f 561 char suc_reason;
8e09f215
SW		 562};
563
564
565
566int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
567void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
568int dasd_alias_add_device(struct dasd_device *);
569int dasd_alias_remove_device(struct dasd_device *);
570struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
59a9ed5f 571void dasd_alias_handle_summary_unit_check(struct work_struct *);
8e09f215 572void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
f4ac1d02
SW		 573void dasd_alias_lcu_setup_complete(struct dasd_device *);
574void dasd_alias_wait_for_lcu_setup(struct dasd_device *);
501183f2 575int dasd_alias_update_add_device(struct dasd_device *);
1da177e4 576#endif /* DASD_ECKD_H */
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