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_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_SNID               0x34
  31 #define DASD_ECKD_CCW_RSSD               0x3e
  32 #define DASD_ECKD_CCW_LOCATE_RECORD      0x47
  33 #define DASD_ECKD_CCW_LOCATE_RECORD_EXT  0x4b
  34 #define DASD_ECKD_CCW_SNSS               0x54
  35 #define DASD_ECKD_CCW_DEFINE_EXTENT      0x63
  36 #define DASD_ECKD_CCW_WRITE_MT           0x85
  37 #define DASD_ECKD_CCW_READ_MT            0x86
  38 #define DASD_ECKD_CCW_WRITE_KD_MT        0x8d
  39 #define DASD_ECKD_CCW_READ_KD_MT         0x8e
  40 #define DASD_ECKD_CCW_READ_COUNT_MT      0x92
  41 #define DASD_ECKD_CCW_RELEASE            0x94
  42 #define DASD_ECKD_CCW_WRITE_FULL_TRACK   0x95
  43 #define DASD_ECKD_CCW_READ_CKD_MT        0x9e
  44 #define DASD_ECKD_CCW_WRITE_CKD_MT       0x9d
  45 #define DASD_ECKD_CCW_WRITE_TRACK_DATA   0xA5
  46 #define DASD_ECKD_CCW_READ_TRACK_DATA    0xA6
  47 #define DASD_ECKD_CCW_RESERVE            0xB4
  48 #define DASD_ECKD_CCW_READ_TRACK         0xDE
  49 #define DASD_ECKD_CCW_PFX                0xE7
  50 #define DASD_ECKD_CCW_PFX_READ           0xEA
  51 #define DASD_ECKD_CCW_RSCK               0xF9
  52 #define DASD_ECKD_CCW_RCD                0xFA
  53 #define DASD_ECKD_CCW_DSO                0xF7
  54
  55 /* Define Subssystem Function / Orders */
  56 #define DSO_ORDER_RAS                    0x81
  57
  58 /*
  59  * Perform Subsystem Function / Orders
  60  */
  61 #define PSF_ORDER_PRSSD                  0x18
  62 #define PSF_ORDER_CUIR_RESPONSE          0x1A
  63 #define PSF_ORDER_SSC                    0x1D
  64
  65 /*
  66  * Perform Subsystem Function / Sub-Orders
  67  */
  68 #define PSF_SUBORDER_QHA                 0x1C /* Query Host Access */
  69 #define PSF_SUBORDER_VSQ                 0x52 /* Volume Storage Query */
  70 #define PSF_SUBORDER_LCQ                 0x53 /* Logical Configuration Query */
  71
  72 /*
  73  * CUIR response condition codes
  74  */
  75 #define PSF_CUIR_INVALID                 0x00
  76 #define PSF_CUIR_COMPLETED               0x01
  77 #define PSF_CUIR_NOT_SUPPORTED           0x02
  78 #define PSF_CUIR_ERROR_IN_REQ            0x03
  79 #define PSF_CUIR_DENIED                  0x04
  80 #define PSF_CUIR_LAST_PATH               0x05
  81 #define PSF_CUIR_DEVICE_ONLINE           0x06
  82 #define PSF_CUIR_VARY_FAILURE            0x07
  83 #define PSF_CUIR_SOFTWARE_FAILURE        0x08
  84 #define PSF_CUIR_NOT_RECOGNIZED          0x09
  85
  86 /*
  87  * CUIR codes
  88  */
  89 #define CUIR_QUIESCE                     0x01
  90 #define CUIR_RESUME                      0x02
  91
  92 /*
  93  * attention message definitions
  94  */
  95 #define ATTENTION_LENGTH_CUIR            0x0e
  96 #define ATTENTION_FORMAT_CUIR            0x01
  97
  98 #define DASD_ECKD_PG_GROUPED             0x10
  99
 100 /*
 101  * Size that is reportet for large volumes in the old 16-bit no_cyl field
 102  */
 103 #define LV_COMPAT_CYL 0xFFFE
 104
 105
 106 #define FCX_MAX_DATA_FACTOR 65536
 107 #define DASD_ECKD_RCD_DATA_SIZE 256
 108
 109 #define DASD_ECKD_PATH_THRHLD            256
 110 #define DASD_ECKD_PATH_INTERVAL          300
 111
 112 /*
 113  * Maximum number of blocks to be chained
 114  */
 115 #define DASD_ECKD_MAX_BLOCKS             190
 116 #define DASD_ECKD_MAX_BLOCKS_RAW         256
 117
 118 /*****************************************************************************
 119  * SECTION: Type Definitions
 120  ****************************************************************************/
 121
 122 struct eckd_count {
 123         __u16 cyl;
 124         __u16 head;
 125         __u8 record;
 126         __u8 kl;
 127         __u16 dl;
 128 } __attribute__ ((packed));
 129
 130 struct ch_t {
 131         __u16 cyl;
 132         __u16 head;
 133 } __attribute__ ((packed));
 134
 135 struct chr_t {
 136         __u16 cyl;
 137         __u16 head;
 138         __u8 record;
 139 } __attribute__ ((packed));
 140
 141 struct DE_eckd_data {
 142         struct {
 143                 unsigned char perm:2;   /* Permissions on this extent */
 144                 unsigned char reserved:1;
 145                 unsigned char seek:2;   /* Seek control */
 146                 unsigned char auth:2;   /* Access authorization */
 147                 unsigned char pci:1;    /* PCI Fetch mode */
 148         } __attribute__ ((packed)) mask;
 149         struct {
 150                 unsigned char mode:2;   /* Architecture mode */
 151                 unsigned char ckd:1;    /* CKD Conversion */
 152                 unsigned char operation:3;      /* Operation mode */
 153                 unsigned char cfw:1;    /* Cache fast write */
 154                 unsigned char dfw:1;    /* DASD fast write */
 155         } __attribute__ ((packed)) attributes;
 156         __u16 blk_size;         /* Blocksize */
 157         __u16 fast_write_id;
 158         __u8 ga_additional;     /* Global Attributes Additional */
 159         __u8 ga_extended;       /* Global Attributes Extended   */
 160         struct ch_t beg_ext;
 161         struct ch_t end_ext;
 162         unsigned long ep_sys_time; /* Ext Parameter - System Time Stamp */
 163         __u8 ep_format;        /* Extended Parameter format byte       */
 164         __u8 ep_prio;          /* Extended Parameter priority I/O byte */
 165         __u8 ep_reserved1;     /* Extended Parameter Reserved          */
 166         __u8 ep_rec_per_track; /* Number of records on a track         */
 167         __u8 ep_reserved[4];   /* Extended Parameter Reserved          */
 168 } __attribute__ ((packed));
 169
 170 struct LO_eckd_data {
 171         struct {
 172                 unsigned char orientation:2;
 173                 unsigned char operation:6;
 174         } __attribute__ ((packed)) operation;
 175         struct {
 176                 unsigned char last_bytes_used:1;
 177                 unsigned char reserved:6;
 178                 unsigned char read_count_suffix:1;
 179         } __attribute__ ((packed)) auxiliary;
 180         __u8 unused;
 181         __u8 count;
 182         struct ch_t seek_addr;
 183         struct chr_t search_arg;
 184         __u8 sector;
 185         __u16 length;
 186 } __attribute__ ((packed));
 187
 188 struct LRE_eckd_data {
 189         struct {
 190                 unsigned char orientation:2;
 191                 unsigned char operation:6;
 192         } __attribute__ ((packed)) operation;
 193         struct {
 194                 unsigned char length_valid:1;
 195                 unsigned char length_scope:1;
 196                 unsigned char imbedded_ccw_valid:1;
 197                 unsigned char check_bytes:2;
 198                 unsigned char imbedded_count_valid:1;
 199                 unsigned char reserved:1;
 200                 unsigned char read_count_suffix:1;
 201         } __attribute__ ((packed)) auxiliary;
 202         __u8 imbedded_ccw;
 203         __u8 count;
 204         struct ch_t seek_addr;
 205         struct chr_t search_arg;
 206         __u8 sector;
 207         __u16 length;
 208         __u8 imbedded_count;
 209         __u8 extended_operation;
 210         __u16 extended_parameter_length;
 211         __u8 extended_parameter[0];
 212 } __attribute__ ((packed));
 213
 214 /* Prefix data for format 0x00 and 0x01 */
 215 struct PFX_eckd_data {
 216         unsigned char format;
 217         struct {
 218                 unsigned char define_extent:1;
 219                 unsigned char time_stamp:1;
 220                 unsigned char verify_base:1;
 221                 unsigned char hyper_pav:1;
 222                 unsigned char reserved:4;
 223         } __attribute__ ((packed)) validity;
 224         __u8 base_address;
 225         __u8 aux;
 226         __u8 base_lss;
 227         __u8 reserved[7];
 228         struct DE_eckd_data define_extent;
 229         struct LRE_eckd_data locate_record;
 230 } __attribute__ ((packed));
 231
 232 struct dasd_eckd_characteristics {
 233         __u16 cu_type;
 234         struct {
 235                 unsigned char support:2;
 236                 unsigned char async:1;
 237                 unsigned char reserved:1;
 238                 unsigned char cache_info:1;
 239                 unsigned char model:3;
 240         } __attribute__ ((packed)) cu_model;
 241         __u16 dev_type;
 242         __u8 dev_model;
 243         struct {
 244                 unsigned char mult_burst:1;
 245                 unsigned char RT_in_LR:1;
 246                 unsigned char reserved1:1;
 247                 unsigned char RD_IN_LR:1;
 248                 unsigned char reserved2:4;
 249                 unsigned char reserved3:8;
 250                 unsigned char defect_wr:1;
 251                 unsigned char XRC_supported:1;
 252                 unsigned char reserved4:1;
 253                 unsigned char striping:1;
 254                 unsigned char reserved5:4;
 255                 unsigned char cfw:1;
 256                 unsigned char reserved6:2;
 257                 unsigned char cache:1;
 258                 unsigned char dual_copy:1;
 259                 unsigned char dfw:1;
 260                 unsigned char reset_alleg:1;
 261                 unsigned char sense_down:1;
 262         } __attribute__ ((packed)) facilities;
 263         __u8 dev_class;
 264         __u8 unit_type;
 265         __u16 no_cyl;
 266         __u16 trk_per_cyl;
 267         __u8 sec_per_trk;
 268         __u8 byte_per_track[3];
 269         __u16 home_bytes;
 270         __u8 formula;
 271         union {
 272                 struct {
 273                         __u8 f1;
 274                         __u16 f2;
 275                         __u16 f3;
 276                 } __attribute__ ((packed)) f_0x01;
 277                 struct {
 278                         __u8 f1;
 279                         __u8 f2;
 280                         __u8 f3;
 281                         __u8 f4;
 282                         __u8 f5;
 283                 } __attribute__ ((packed)) f_0x02;
 284         } __attribute__ ((packed)) factors;
 285         __u16 first_alt_trk;
 286         __u16 no_alt_trk;
 287         __u16 first_dia_trk;
 288         __u16 no_dia_trk;
 289         __u16 first_sup_trk;
 290         __u16 no_sup_trk;
 291         __u8 MDR_ID;
 292         __u8 OBR_ID;
 293         __u8 director;
 294         __u8 rd_trk_set;
 295         __u16 max_rec_zero;
 296         __u8 reserved1;
 297         __u8 RWANY_in_LR;
 298         __u8 factor6;
 299         __u8 factor7;
 300         __u8 factor8;
 301         __u8 reserved2[3];
 302         __u8 reserved3[6];
 303         __u32 long_no_cyl;
 304 } __attribute__ ((packed));
 305
 306 /* elements of the configuration data */
 307 struct dasd_ned {
 308         struct {
 309                 __u8 identifier:2;
 310                 __u8 token_id:1;
 311                 __u8 sno_valid:1;
 312                 __u8 subst_sno:1;
 313                 __u8 recNED:1;
 314                 __u8 emuNED:1;
 315                 __u8 reserved:1;
 316         } __attribute__ ((packed)) flags;
 317         __u8 descriptor;
 318         __u8 dev_class;
 319         __u8 reserved;
 320         __u8 dev_type[6];
 321         __u8 dev_model[3];
 322         __u8 HDA_manufacturer[3];
 323         __u8 HDA_location[2];
 324         __u8 HDA_seqno[12];
 325         __u8 ID;
 326         __u8 unit_addr;
 327 } __attribute__ ((packed));
 328
 329 struct dasd_sneq {
 330         struct {
 331                 __u8 identifier:2;
 332                 __u8 reserved:6;
 333         } __attribute__ ((packed)) flags;
 334         __u8 res1;
 335         __u16 format;
 336         __u8 res2[4];           /* byte  4- 7 */
 337         __u8 sua_flags;         /* byte  8    */
 338         __u8 base_unit_addr;    /* byte  9    */
 339         __u8 res3[22];          /* byte 10-31 */
 340 } __attribute__ ((packed));
 341
 342 struct vd_sneq {
 343         struct {
 344                 __u8 identifier:2;
 345                 __u8 reserved:6;
 346         } __attribute__ ((packed)) flags;
 347         __u8 res1;
 348         __u16 format;
 349         __u8 res2[4];   /* byte  4- 7 */
 350         __u8 uit[16];   /* byte  8-23 */
 351         __u8 res3[8];   /* byte 24-31 */
 352 } __attribute__ ((packed));
 353
 354 struct dasd_gneq {
 355         struct {
 356                 __u8 identifier:2;
 357                 __u8 reserved:6;
 358         } __attribute__ ((packed)) flags;
 359         __u8 record_selector;
 360         __u8 reserved[4];
 361         struct {
 362                 __u8 value:2;
 363                 __u8 number:6;
 364         } __attribute__ ((packed)) timeout;
 365         __u8 reserved3;
 366         __u16 subsystemID;
 367         __u8 reserved2[22];
 368 } __attribute__ ((packed));
 369
 370 struct dasd_rssd_features {
 371         char feature[256];
 372 } __attribute__((packed));
 373
 374 struct dasd_rssd_messages {
 375         __u16 length;
 376         __u8 format;
 377         __u8 code;
 378         __u32 message_id;
 379         __u8 flags;
 380         char messages[4087];
 381 } __packed;
 382
 383 /*
 384  * Read Subsystem Data - Volume Storage Query
 385  */
 386 struct dasd_rssd_vsq {
 387         struct {
 388                 __u8 tse:1;
 389                 __u8 space_not_available:1;
 390                 __u8 ese:1;
 391                 __u8 unused:5;
 392         } __packed vol_info;
 393         __u8 unused1;
 394         __u16 extent_pool_id;
 395         __u8 warn_cap_limit;
 396         __u8 warn_cap_guaranteed;
 397         __u16 unused2;
 398         __u32 limit_capacity;
 399         __u32 guaranteed_capacity;
 400         __u32 space_allocated;
 401         __u32 space_configured;
 402         __u32 logical_capacity;
 403 } __packed;
 404
 405 /*
 406  * Extent Pool Summary
 407  */
 408 struct dasd_ext_pool_sum {
 409         __u16 pool_id;
 410         __u8 repo_warn_thrshld;
 411         __u8 warn_thrshld;
 412         struct {
 413                 __u8 type:1;                    /* 0 - CKD / 1 - FB */
 414                 __u8 track_space_efficient:1;
 415                 __u8 extent_space_efficient:1;
 416                 __u8 standard_volume:1;
 417                 __u8 extent_size_valid:1;
 418                 __u8 capacity_at_warnlevel:1;
 419                 __u8 pool_oos:1;
 420                 __u8 unused0:1;
 421                 __u8 unused1;
 422         } __packed flags;
 423         struct {
 424                 __u8 reserved0:1;
 425                 __u8 size_1G:1;
 426                 __u8 reserved1:5;
 427                 __u8 size_16M:1;
 428         } __packed extent_size;
 429         __u8 unused;
 430 } __packed;
 431
 432 /*
 433  * Read Subsystem Data-Response - Logical Configuration Query - Header
 434  */
 435 struct dasd_rssd_lcq {
 436         __u16 data_length;              /* Length of data returned */
 437         __u16 pool_count;               /* Count of extent pools returned - Max: 448 */
 438         struct {
 439                 __u8 pool_info_valid:1; /* Detailed Information valid */
 440                 __u8 pool_id_volume:1;
 441                 __u8 pool_id_cec:1;
 442                 __u8 unused0:5;
 443                 __u8 unused1;
 444         } __packed header_flags;
 445         char sfi_type[6];               /* Storage Facility Image Type (EBCDIC) */
 446         char sfi_model[3];              /* Storage Facility Image Model (EBCDIC) */
 447         __u8 sfi_seq_num[10];           /* Storage Facility Image Sequence Number */
 448         __u8 reserved[7];
 449         struct dasd_ext_pool_sum ext_pool_sum[448];
 450 } __packed;
 451
 452 struct dasd_cuir_message {
 453         __u16 length;
 454         __u8 format;
 455         __u8 code;
 456         __u32 message_id;
 457         __u8 flags;
 458         __u8 neq_map[3];
 459         __u8 ned_map;
 460         __u8 record_selector;
 461 } __packed;
 462
 463 struct dasd_psf_cuir_response {
 464         __u8 order;
 465         __u8 flags;
 466         __u8 cc;
 467         __u8 chpid;
 468         __u16 device_nr;
 469         __u16 reserved;
 470         __u32 message_id;
 471         __u64 system_id;
 472         __u8 cssid;
 473         __u8 ssid;
 474 } __packed;
 475
 476 struct dasd_ckd_path_group_entry {
 477         __u8 status_flags;
 478         __u8 pgid[11];
 479         __u8 sysplex_name[8];
 480         __u32 timestamp;
 481         __u32 cylinder;
 482         __u8 reserved[4];
 483 } __packed;
 484
 485 struct dasd_ckd_host_information {
 486         __u8 access_flags;
 487         __u8 entry_size;
 488         __u16 entry_count;
 489         __u8 entry[16390];
 490 } __packed;
 491
 492 struct dasd_psf_query_host_access {
 493         __u8 access_flag;
 494         __u8 version;
 495         __u16 CKD_length;
 496         __u16 SCSI_length;
 497         __u8 unused[10];
 498         __u8 host_access_information[16394];
 499 } __packed;
 500
 501 /*
 502  * Perform Subsystem Function - Prepare for Read Subsystem Data
 503  */
 504 struct dasd_psf_prssd_data {
 505         unsigned char order;
 506         unsigned char flags;
 507         unsigned char reserved1;
 508         unsigned char reserved2;
 509         unsigned char lss;
 510         unsigned char volume;
 511         unsigned char suborder;
 512         unsigned char varies[5];
 513 } __attribute__ ((packed));
 514
 515 /*
 516  * Perform Subsystem Function - Set Subsystem Characteristics
 517  */
 518 struct dasd_psf_ssc_data {
 519         unsigned char order;
 520         unsigned char flags;
 521         unsigned char cu_type[4];
 522         unsigned char suborder;
 523         unsigned char reserved[59];
 524 } __attribute__((packed));
 525
 526 /* Maximum number of extents for a single Release Allocated Space command */
 527 #define DASD_ECKD_RAS_EXTS_MAX          110U
 528
 529 struct dasd_dso_ras_ext_range {
 530         struct ch_t beg_ext;
 531         struct ch_t end_ext;
 532 } __packed;
 533
 534 /*
 535  * Define Subsytem Operation - Release Allocated Space
 536  */
 537 struct dasd_dso_ras_data {
 538         __u8 order;
 539         struct {
 540                 __u8 message:1;         /* Must be zero */
 541                 __u8 reserved1:2;
 542                 __u8 vol_type:1;        /* 0 - CKD/FBA, 1 - FB */
 543                 __u8 reserved2:4;
 544         } __packed flags;
 545         /* Operation Flags to specify scope */
 546         struct {
 547                 __u8 reserved1:2;
 548                 /* Release Space by Extent */
 549                 __u8 by_extent:1;       /* 0 - entire volume, 1 - specified extents */
 550                 __u8 guarantee_init:1;
 551                 __u8 force_release:1;   /* Internal - will be ignored */
 552                 __u16 reserved2:11;
 553         } __packed op_flags;
 554         __u8 lss;
 555         __u8 dev_addr;
 556         __u32 reserved1;
 557         __u8 reserved2[10];
 558         __u16 nr_exts;                  /* Defines number of ext_scope - max 110 */
 559         __u16 reserved3;
 560 } __packed;
 561
 562
 563 /*
 564  * some structures and definitions for alias handling
 565  */
 566 struct dasd_unit_address_configuration {
 567         struct {
 568                 char ua_type;
 569                 char base_ua;
 570         } unit[256];
 571 } __attribute__((packed));
 572
 573
 574 #define MAX_DEVICES_PER_LCU 256
 575
 576 /* flags on the LCU  */
 577 #define NEED_UAC_UPDATE  0x01
 578 #define UPDATE_PENDING  0x02
 579
 580 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
 581
 582
 583 struct alias_root {
 584         struct list_head serverlist;
 585         spinlock_t lock;
 586 };
 587
 588 struct alias_server {
 589         struct list_head server;
 590         struct dasd_uid uid;
 591         struct list_head lculist;
 592 };
 593
 594 struct summary_unit_check_work_data {
 595         char reason;
 596         struct dasd_device *device;
 597         struct work_struct worker;
 598 };
 599
 600 struct read_uac_work_data {
 601         struct dasd_device *device;
 602         struct delayed_work dwork;
 603 };
 604
 605 struct alias_lcu {
 606         struct list_head lcu;
 607         struct dasd_uid uid;
 608         enum pavtype pav;
 609         char flags;
 610         spinlock_t lock;
 611         struct list_head grouplist;
 612         struct list_head active_devices;
 613         struct list_head inactive_devices;
 614         struct dasd_unit_address_configuration *uac;
 615         struct summary_unit_check_work_data suc_data;
 616         struct read_uac_work_data ruac_data;
 617         struct dasd_ccw_req *rsu_cqr;
 618         struct completion lcu_setup;
 619 };
 620
 621 struct alias_pav_group {
 622         struct list_head group;
 623         struct dasd_uid uid;
 624         struct alias_lcu *lcu;
 625         struct list_head baselist;
 626         struct list_head aliaslist;
 627         struct dasd_device *next;
 628 };
 629
 630 struct dasd_conf_data {
 631         struct dasd_ned neds[5];
 632         u8 reserved[64];
 633         struct dasd_gneq gneq;
 634 } __packed;
 635
 636 struct dasd_eckd_private {
 637         struct dasd_eckd_characteristics rdc_data;
 638         u8 *conf_data;
 639         int conf_len;
 640
 641         /* pointers to specific parts in the conf_data */
 642         struct dasd_ned *ned;
 643         struct dasd_sneq *sneq;
 644         struct vd_sneq *vdsneq;
 645         struct dasd_gneq *gneq;
 646
 647         struct eckd_count count_area[5];
 648         int init_cqr_status;
 649         int uses_cdl;
 650         struct attrib_data_t attrib;    /* e.g. cache operations */
 651         struct dasd_rssd_features features;
 652         struct dasd_rssd_vsq vsq;
 653         struct dasd_ext_pool_sum eps;
 654         u32 real_cyl;
 655
 656         /* alias managemnet */
 657         struct dasd_uid uid;
 658         struct alias_pav_group *pavgroup;
 659         struct alias_lcu *lcu;
 660         int count;
 661
 662         u32 fcx_max_data;
 663         char suc_reason;
 664 };
 665
 666
 667
 668 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
 669 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
 670 int dasd_alias_add_device(struct dasd_device *);
 671 int dasd_alias_remove_device(struct dasd_device *);
 672 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
 673 void dasd_alias_handle_summary_unit_check(struct work_struct *);
 674 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
 675 int dasd_alias_update_add_device(struct dasd_device *);
 676 #endif                          /* DASD_ECKD_H */