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  * Out-of-space (OOS) Codes
  94  */
  95 #define REPO_WARN                        0x01
  96 #define REPO_EXHAUST                     0x02
  97 #define POOL_WARN                        0x03
  98 #define POOL_EXHAUST                     0x04
  99 #define REPO_RELIEVE                     0x05
 100 #define POOL_RELIEVE                     0x06
 101
 102 /*
 103  * attention message definitions
 104  */
 105 #define ATTENTION_LENGTH_CUIR            0x0e
 106 #define ATTENTION_FORMAT_CUIR            0x01
 107 #define ATTENTION_LENGTH_OOS             0x10
 108 #define ATTENTION_FORMAT_OOS             0x06
 109
 110 #define DASD_ECKD_PG_GROUPED             0x10
 111
 112 /*
 113  * Size that is reportet for large volumes in the old 16-bit no_cyl field
 114  */
 115 #define LV_COMPAT_CYL 0xFFFE
 116
 117
 118 #define FCX_MAX_DATA_FACTOR 65536
 119 #define DASD_ECKD_RCD_DATA_SIZE 256
 120
 121 #define DASD_ECKD_PATH_THRHLD            256
 122 #define DASD_ECKD_PATH_INTERVAL          300
 123
 124 /*
 125  * Maximum number of blocks to be chained
 126  */
 127 #define DASD_ECKD_MAX_BLOCKS             190
 128 #define DASD_ECKD_MAX_BLOCKS_RAW         256
 129
 130 /*****************************************************************************
 131  * SECTION: Type Definitions
 132  ****************************************************************************/
 133
 134 struct eckd_count {
 135         __u16 cyl;
 136         __u16 head;
 137         __u8 record;
 138         __u8 kl;
 139         __u16 dl;
 140 } __attribute__ ((packed));
 141
 142 struct ch_t {
 143         __u16 cyl;
 144         __u16 head;
 145 } __attribute__ ((packed));
 146
 147 struct chr_t {
 148         __u16 cyl;
 149         __u16 head;
 150         __u8 record;
 151 } __attribute__ ((packed));
 152
 153 struct DE_eckd_data {
 154         struct {
 155                 unsigned char perm:2;   /* Permissions on this extent */
 156                 unsigned char reserved:1;
 157                 unsigned char seek:2;   /* Seek control */
 158                 unsigned char auth:2;   /* Access authorization */
 159                 unsigned char pci:1;    /* PCI Fetch mode */
 160         } __attribute__ ((packed)) mask;
 161         struct {
 162                 unsigned char mode:2;   /* Architecture mode */
 163                 unsigned char ckd:1;    /* CKD Conversion */
 164                 unsigned char operation:3;      /* Operation mode */
 165                 unsigned char cfw:1;    /* Cache fast write */
 166                 unsigned char dfw:1;    /* DASD fast write */
 167         } __attribute__ ((packed)) attributes;
 168         __u16 blk_size;         /* Blocksize */
 169         __u16 fast_write_id;
 170         __u8 ga_additional;     /* Global Attributes Additional */
 171         __u8 ga_extended;       /* Global Attributes Extended   */
 172         struct ch_t beg_ext;
 173         struct ch_t end_ext;
 174         unsigned long ep_sys_time; /* Ext Parameter - System Time Stamp */
 175         __u8 ep_format;        /* Extended Parameter format byte       */
 176         __u8 ep_prio;          /* Extended Parameter priority I/O byte */
 177         __u8 ep_reserved1;     /* Extended Parameter Reserved          */
 178         __u8 ep_rec_per_track; /* Number of records on a track         */
 179         __u8 ep_reserved[4];   /* Extended Parameter Reserved          */
 180 } __attribute__ ((packed));
 181
 182 struct LO_eckd_data {
 183         struct {
 184                 unsigned char orientation:2;
 185                 unsigned char operation:6;
 186         } __attribute__ ((packed)) operation;
 187         struct {
 188                 unsigned char last_bytes_used:1;
 189                 unsigned char reserved:6;
 190                 unsigned char read_count_suffix:1;
 191         } __attribute__ ((packed)) auxiliary;
 192         __u8 unused;
 193         __u8 count;
 194         struct ch_t seek_addr;
 195         struct chr_t search_arg;
 196         __u8 sector;
 197         __u16 length;
 198 } __attribute__ ((packed));
 199
 200 struct LRE_eckd_data {
 201         struct {
 202                 unsigned char orientation:2;
 203                 unsigned char operation:6;
 204         } __attribute__ ((packed)) operation;
 205         struct {
 206                 unsigned char length_valid:1;
 207                 unsigned char length_scope:1;
 208                 unsigned char imbedded_ccw_valid:1;
 209                 unsigned char check_bytes:2;
 210                 unsigned char imbedded_count_valid:1;
 211                 unsigned char reserved:1;
 212                 unsigned char read_count_suffix:1;
 213         } __attribute__ ((packed)) auxiliary;
 214         __u8 imbedded_ccw;
 215         __u8 count;
 216         struct ch_t seek_addr;
 217         struct chr_t search_arg;
 218         __u8 sector;
 219         __u16 length;
 220         __u8 imbedded_count;
 221         __u8 extended_operation;
 222         __u16 extended_parameter_length;
 223         __u8 extended_parameter[];
 224 } __attribute__ ((packed));
 225
 226 /* Prefix data for format 0x00 and 0x01 */
 227 struct PFX_eckd_data {
 228         unsigned char format;
 229         struct {
 230                 unsigned char define_extent:1;
 231                 unsigned char time_stamp:1;
 232                 unsigned char verify_base:1;
 233                 unsigned char hyper_pav:1;
 234                 unsigned char reserved:4;
 235         } __attribute__ ((packed)) validity;
 236         __u8 base_address;
 237         __u8 aux;
 238         __u8 base_lss;
 239         __u8 reserved[7];
 240         struct DE_eckd_data define_extent;
 241         struct LRE_eckd_data locate_record;
 242 } __attribute__ ((packed));
 243
 244 struct dasd_eckd_characteristics {
 245         __u16 cu_type;
 246         struct {
 247                 unsigned char support:2;
 248                 unsigned char async:1;
 249                 unsigned char reserved:1;
 250                 unsigned char cache_info:1;
 251                 unsigned char model:3;
 252         } __attribute__ ((packed)) cu_model;
 253         __u16 dev_type;
 254         __u8 dev_model;
 255         struct {
 256                 unsigned char mult_burst:1;
 257                 unsigned char RT_in_LR:1;
 258                 unsigned char reserved1:1;
 259                 unsigned char RD_IN_LR:1;
 260                 unsigned char reserved2:4;
 261                 unsigned char reserved3:8;
 262                 unsigned char defect_wr:1;
 263                 unsigned char XRC_supported:1;
 264                 unsigned char reserved4:1;
 265                 unsigned char striping:1;
 266                 unsigned char reserved5:4;
 267                 unsigned char cfw:1;
 268                 unsigned char reserved6:2;
 269                 unsigned char cache:1;
 270                 unsigned char dual_copy:1;
 271                 unsigned char dfw:1;
 272                 unsigned char reset_alleg:1;
 273                 unsigned char sense_down:1;
 274         } __attribute__ ((packed)) facilities;
 275         __u8 dev_class;
 276         __u8 unit_type;
 277         __u16 no_cyl;
 278         __u16 trk_per_cyl;
 279         __u8 sec_per_trk;
 280         __u8 byte_per_track[3];
 281         __u16 home_bytes;
 282         __u8 formula;
 283         union {
 284                 struct {
 285                         __u8 f1;
 286                         __u16 f2;
 287                         __u16 f3;
 288                 } __attribute__ ((packed)) f_0x01;
 289                 struct {
 290                         __u8 f1;
 291                         __u8 f2;
 292                         __u8 f3;
 293                         __u8 f4;
 294                         __u8 f5;
 295                 } __attribute__ ((packed)) f_0x02;
 296         } __attribute__ ((packed)) factors;
 297         __u16 first_alt_trk;
 298         __u16 no_alt_trk;
 299         __u16 first_dia_trk;
 300         __u16 no_dia_trk;
 301         __u16 first_sup_trk;
 302         __u16 no_sup_trk;
 303         __u8 MDR_ID;
 304         __u8 OBR_ID;
 305         __u8 director;
 306         __u8 rd_trk_set;
 307         __u16 max_rec_zero;
 308         __u8 reserved1;
 309         __u8 RWANY_in_LR;
 310         __u8 factor6;
 311         __u8 factor7;
 312         __u8 factor8;
 313         __u8 reserved2[3];
 314         __u8 reserved3[6];
 315         __u32 long_no_cyl;
 316 } __attribute__ ((packed));
 317
 318 /* elements of the configuration data */
 319 struct dasd_ned {
 320         struct {
 321                 __u8 identifier:2;
 322                 __u8 token_id:1;
 323                 __u8 sno_valid:1;
 324                 __u8 subst_sno:1;
 325                 __u8 recNED:1;
 326                 __u8 emuNED:1;
 327                 __u8 reserved:1;
 328         } __attribute__ ((packed)) flags;
 329         __u8 descriptor;
 330         __u8 dev_class;
 331         __u8 reserved;
 332         __u8 dev_type[6];
 333         __u8 dev_model[3];
 334         __u8 HDA_manufacturer[3];
 335         __u8 HDA_location[2];
 336         __u8 HDA_seqno[12];
 337         __u8 ID;
 338         __u8 unit_addr;
 339 } __attribute__ ((packed));
 340
 341 struct dasd_sneq {
 342         struct {
 343                 __u8 identifier:2;
 344                 __u8 reserved:6;
 345         } __attribute__ ((packed)) flags;
 346         __u8 res1;
 347         __u16 format;
 348         __u8 res2[4];           /* byte  4- 7 */
 349         __u8 sua_flags;         /* byte  8    */
 350         __u8 base_unit_addr;    /* byte  9    */
 351         __u8 res3[22];          /* byte 10-31 */
 352 } __attribute__ ((packed));
 353
 354 struct vd_sneq {
 355         struct {
 356                 __u8 identifier:2;
 357                 __u8 reserved:6;
 358         } __attribute__ ((packed)) flags;
 359         __u8 res1;
 360         __u16 format;
 361         __u8 res2[4];   /* byte  4- 7 */
 362         __u8 uit[16];   /* byte  8-23 */
 363         __u8 res3[8];   /* byte 24-31 */
 364 } __attribute__ ((packed));
 365
 366 struct dasd_gneq {
 367         struct {
 368                 __u8 identifier:2;
 369                 __u8 reserved:6;
 370         } __attribute__ ((packed)) flags;
 371         __u8 record_selector;
 372         __u8 reserved[4];
 373         struct {
 374                 __u8 value:2;
 375                 __u8 number:6;
 376         } __attribute__ ((packed)) timeout;
 377         __u8 reserved3;
 378         __u16 subsystemID;
 379         __u8 reserved2[22];
 380 } __attribute__ ((packed));
 381
 382 struct dasd_rssd_features {
 383         char feature[256];
 384 } __attribute__((packed));
 385
 386 struct dasd_rssd_messages {
 387         __u16 length;
 388         __u8 format;
 389         __u8 code;
 390         __u32 message_id;
 391         __u8 flags;
 392         char messages[4087];
 393 } __packed;
 394
 395 /*
 396  * Read Subsystem Data - Volume Storage Query
 397  */
 398 struct dasd_rssd_vsq {
 399         struct {
 400                 __u8 tse:1;
 401                 __u8 space_not_available:1;
 402                 __u8 ese:1;
 403                 __u8 unused:5;
 404         } __packed vol_info;
 405         __u8 unused1;
 406         __u16 extent_pool_id;
 407         __u8 warn_cap_limit;
 408         __u8 warn_cap_guaranteed;
 409         __u16 unused2;
 410         __u32 limit_capacity;
 411         __u32 guaranteed_capacity;
 412         __u32 space_allocated;
 413         __u32 space_configured;
 414         __u32 logical_capacity;
 415 } __packed;
 416
 417 /*
 418  * Extent Pool Summary
 419  */
 420 struct dasd_ext_pool_sum {
 421         __u16 pool_id;
 422         __u8 repo_warn_thrshld;
 423         __u8 warn_thrshld;
 424         struct {
 425                 __u8 type:1;                    /* 0 - CKD / 1 - FB */
 426                 __u8 track_space_efficient:1;
 427                 __u8 extent_space_efficient:1;
 428                 __u8 standard_volume:1;
 429                 __u8 extent_size_valid:1;
 430                 __u8 capacity_at_warnlevel:1;
 431                 __u8 pool_oos:1;
 432                 __u8 unused0:1;
 433                 __u8 unused1;
 434         } __packed flags;
 435         struct {
 436                 __u8 reserved0:1;
 437                 __u8 size_1G:1;
 438                 __u8 reserved1:5;
 439                 __u8 size_16M:1;
 440         } __packed extent_size;
 441         __u8 unused;
 442 } __packed;
 443
 444 /*
 445  * Read Subsystem Data-Response - Logical Configuration Query - Header
 446  */
 447 struct dasd_rssd_lcq {
 448         __u16 data_length;              /* Length of data returned */
 449         __u16 pool_count;               /* Count of extent pools returned - Max: 448 */
 450         struct {
 451                 __u8 pool_info_valid:1; /* Detailed Information valid */
 452                 __u8 pool_id_volume:1;
 453                 __u8 pool_id_cec:1;
 454                 __u8 unused0:5;
 455                 __u8 unused1;
 456         } __packed header_flags;
 457         char sfi_type[6];               /* Storage Facility Image Type (EBCDIC) */
 458         char sfi_model[3];              /* Storage Facility Image Model (EBCDIC) */
 459         __u8 sfi_seq_num[10];           /* Storage Facility Image Sequence Number */
 460         __u8 reserved[7];
 461         struct dasd_ext_pool_sum ext_pool_sum[448];
 462 } __packed;
 463
 464 struct dasd_oos_message {
 465         __u16 length;
 466         __u8 format;
 467         __u8 code;
 468         __u8 percentage_empty;
 469         __u8 reserved;
 470         __u16 ext_pool_id;
 471         __u16 token;
 472         __u8 unused[6];
 473 } __packed;
 474
 475 struct dasd_cuir_message {
 476         __u16 length;
 477         __u8 format;
 478         __u8 code;
 479         __u32 message_id;
 480         __u8 flags;
 481         __u8 neq_map[3];
 482         __u8 ned_map;
 483         __u8 record_selector;
 484 } __packed;
 485
 486 struct dasd_psf_cuir_response {
 487         __u8 order;
 488         __u8 flags;
 489         __u8 cc;
 490         __u8 chpid;
 491         __u16 device_nr;
 492         __u16 reserved;
 493         __u32 message_id;
 494         __u64 system_id;
 495         __u8 cssid;
 496         __u8 ssid;
 497 } __packed;
 498
 499 struct dasd_ckd_path_group_entry {
 500         __u8 status_flags;
 501         __u8 pgid[11];
 502         __u8 sysplex_name[8];
 503         __u32 timestamp;
 504         __u32 cylinder;
 505         __u8 reserved[4];
 506 } __packed;
 507
 508 struct dasd_ckd_host_information {
 509         __u8 access_flags;
 510         __u8 entry_size;
 511         __u16 entry_count;
 512         __u8 entry[16390];
 513 } __packed;
 514
 515 struct dasd_psf_query_host_access {
 516         __u8 access_flag;
 517         __u8 version;
 518         __u16 CKD_length;
 519         __u16 SCSI_length;
 520         __u8 unused[10];
 521         __u8 host_access_information[16394];
 522 } __packed;
 523
 524 /*
 525  * Perform Subsystem Function - Prepare for Read Subsystem Data
 526  */
 527 struct dasd_psf_prssd_data {
 528         unsigned char order;
 529         unsigned char flags;
 530         unsigned char reserved1;
 531         unsigned char reserved2;
 532         unsigned char lss;
 533         unsigned char volume;
 534         unsigned char suborder;
 535         unsigned char varies[5];
 536 } __attribute__ ((packed));
 537
 538 /*
 539  * Perform Subsystem Function - Set Subsystem Characteristics
 540  */
 541 struct dasd_psf_ssc_data {
 542         unsigned char order;
 543         unsigned char flags;
 544         unsigned char cu_type[4];
 545         unsigned char suborder;
 546         unsigned char reserved[59];
 547 } __attribute__((packed));
 548
 549 /* Maximum number of extents for a single Release Allocated Space command */
 550 #define DASD_ECKD_RAS_EXTS_MAX          110U
 551
 552 struct dasd_dso_ras_ext_range {
 553         struct ch_t beg_ext;
 554         struct ch_t end_ext;
 555 } __packed;
 556
 557 /*
 558  * Define Subsytem Operation - Release Allocated Space
 559  */
 560 struct dasd_dso_ras_data {
 561         __u8 order;
 562         struct {
 563                 __u8 message:1;         /* Must be zero */
 564                 __u8 reserved1:2;
 565                 __u8 vol_type:1;        /* 0 - CKD/FBA, 1 - FB */
 566                 __u8 reserved2:4;
 567         } __packed flags;
 568         /* Operation Flags to specify scope */
 569         struct {
 570                 __u8 reserved1:2;
 571                 /* Release Space by Extent */
 572                 __u8 by_extent:1;       /* 0 - entire volume, 1 - specified extents */
 573                 __u8 guarantee_init:1;
 574                 __u8 force_release:1;   /* Internal - will be ignored */
 575                 __u16 reserved2:11;
 576         } __packed op_flags;
 577         __u8 lss;
 578         __u8 dev_addr;
 579         __u32 reserved1;
 580         __u8 reserved2[10];
 581         __u16 nr_exts;                  /* Defines number of ext_scope - max 110 */
 582         __u16 reserved3;
 583 } __packed;
 584
 585
 586 /*
 587  * some structures and definitions for alias handling
 588  */
 589 struct dasd_unit_address_configuration {
 590         struct {
 591                 char ua_type;
 592                 char base_ua;
 593         } unit[256];
 594 } __attribute__((packed));
 595
 596
 597 #define MAX_DEVICES_PER_LCU 256
 598
 599 /* flags on the LCU  */
 600 #define NEED_UAC_UPDATE  0x01
 601 #define UPDATE_PENDING  0x02
 602
 603 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
 604
 605
 606 struct alias_root {
 607         struct list_head serverlist;
 608         spinlock_t lock;
 609 };
 610
 611 struct alias_server {
 612         struct list_head server;
 613         struct dasd_uid uid;
 614         struct list_head lculist;
 615 };
 616
 617 struct summary_unit_check_work_data {
 618         char reason;
 619         struct dasd_device *device;
 620         struct work_struct worker;
 621 };
 622
 623 struct read_uac_work_data {
 624         struct dasd_device *device;
 625         struct delayed_work dwork;
 626 };
 627
 628 struct alias_lcu {
 629         struct list_head lcu;
 630         struct dasd_uid uid;
 631         enum pavtype pav;
 632         char flags;
 633         spinlock_t lock;
 634         struct list_head grouplist;
 635         struct list_head active_devices;
 636         struct list_head inactive_devices;
 637         struct dasd_unit_address_configuration *uac;
 638         struct summary_unit_check_work_data suc_data;
 639         struct read_uac_work_data ruac_data;
 640         struct dasd_ccw_req *rsu_cqr;
 641         struct completion lcu_setup;
 642 };
 643
 644 struct alias_pav_group {
 645         struct list_head group;
 646         struct dasd_uid uid;
 647         struct alias_lcu *lcu;
 648         struct list_head baselist;
 649         struct list_head aliaslist;
 650         struct dasd_device *next;
 651 };
 652
 653 struct dasd_conf_data {
 654         struct dasd_ned neds[5];
 655         u8 reserved[64];
 656         struct dasd_gneq gneq;
 657 } __packed;
 658
 659 struct dasd_eckd_private {
 660         struct dasd_eckd_characteristics rdc_data;
 661         u8 *conf_data;
 662         int conf_len;
 663
 664         /* pointers to specific parts in the conf_data */
 665         struct dasd_ned *ned;
 666         struct dasd_sneq *sneq;
 667         struct vd_sneq *vdsneq;
 668         struct dasd_gneq *gneq;
 669
 670         struct eckd_count count_area[5];
 671         int init_cqr_status;
 672         int uses_cdl;
 673         struct attrib_data_t attrib;    /* e.g. cache operations */
 674         struct dasd_rssd_features features;
 675         struct dasd_rssd_vsq vsq;
 676         struct dasd_ext_pool_sum eps;
 677         u32 real_cyl;
 678
 679         /* alias managemnet */
 680         struct dasd_uid uid;
 681         struct alias_pav_group *pavgroup;
 682         struct alias_lcu *lcu;
 683         int count;
 684
 685         u32 fcx_max_data;
 686         char suc_reason;
 687 };
 688
 689
 690
 691 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
 692 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
 693 int dasd_alias_add_device(struct dasd_device *);
 694 int dasd_alias_remove_device(struct dasd_device *);
 695 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
 696 void dasd_alias_handle_summary_unit_check(struct work_struct *);
 697 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
 698 int dasd_alias_update_add_device(struct dasd_device *);
 699 #endif                          /* DASD_ECKD_H */