drivers/s390/block/dasd_eckd.h

   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 */