drivers/s390/block/dasd_eckd.h

   1 /*
   2  * File...........: linux/drivers/s390/block/dasd_eckd.h
   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  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 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_SNSS               0x54
  34 #define DASD_ECKD_CCW_DEFINE_EXTENT      0x63
  35 #define DASD_ECKD_CCW_WRITE_MT           0x85
  36 #define DASD_ECKD_CCW_READ_MT            0x86
  37 #define DASD_ECKD_CCW_WRITE_KD_MT        0x8d
  38 #define DASD_ECKD_CCW_READ_KD_MT         0x8e
  39 #define DASD_ECKD_CCW_RELEASE            0x94
  40 #define DASD_ECKD_CCW_WRITE_FULL_TRACK   0x95
  41 #define DASD_ECKD_CCW_READ_CKD_MT        0x9e
  42 #define DASD_ECKD_CCW_WRITE_CKD_MT       0x9d
  43 #define DASD_ECKD_CCW_WRITE_TRACK_DATA   0xA5
  44 #define DASD_ECKD_CCW_READ_TRACK_DATA    0xA6
  45 #define DASD_ECKD_CCW_RESERVE            0xB4
  46 #define DASD_ECKD_CCW_READ_TRACK         0xDE
  47 #define DASD_ECKD_CCW_PFX                0xE7
  48 #define DASD_ECKD_CCW_PFX_READ           0xEA
  49 #define DASD_ECKD_CCW_RSCK               0xF9
  50 #define DASD_ECKD_CCW_RCD                0xFA
  51
  52 /*
  53  * Perform Subsystem Function / Sub-Orders
  54  */
  55 #define PSF_ORDER_PRSSD 0x18
  56 #define PSF_ORDER_SSC   0x1D
  57
  58 /*
  59  * Size that is reportet for large volumes in the old 16-bit no_cyl field
  60  */
  61 #define LV_COMPAT_CYL 0xFFFE
  62
  63
  64 #define FCX_MAX_DATA_FACTOR 65536
  65 #define DASD_ECKD_RCD_DATA_SIZE 256
  66
  67
  68 /*****************************************************************************
  69  * SECTION: Type Definitions
  70  ****************************************************************************/
  71
  72 struct eckd_count {
  73         __u16 cyl;
  74         __u16 head;
  75         __u8 record;
  76         __u8 kl;
  77         __u16 dl;
  78 } __attribute__ ((packed));
  79
  80 struct ch_t {
  81         __u16 cyl;
  82         __u16 head;
  83 } __attribute__ ((packed));
  84
  85 struct chs_t {
  86         __u16 cyl;
  87         __u16 head;
  88         __u32 sector;
  89 } __attribute__ ((packed));
  90
  91 struct chr_t {
  92         __u16 cyl;
  93         __u16 head;
  94         __u8 record;
  95 } __attribute__ ((packed));
  96
  97 struct geom_t {
  98         __u16 cyl;
  99         __u16 head;
 100         __u32 sector;
 101 } __attribute__ ((packed));
 102
 103 struct eckd_home {
 104         __u8 skip_control[14];
 105         __u16 cell_number;
 106         __u8 physical_addr[3];
 107         __u8 flag;
 108         struct ch_t track_addr;
 109         __u8 reserved;
 110         __u8 key_length;
 111         __u8 reserved2[2];
 112 } __attribute__ ((packed));
 113
 114 struct DE_eckd_data {
 115         struct {
 116                 unsigned char perm:2;   /* Permissions on this extent */
 117                 unsigned char reserved:1;
 118                 unsigned char seek:2;   /* Seek control */
 119                 unsigned char auth:2;   /* Access authorization */
 120                 unsigned char pci:1;    /* PCI Fetch mode */
 121         } __attribute__ ((packed)) mask;
 122         struct {
 123                 unsigned char mode:2;   /* Architecture mode */
 124                 unsigned char ckd:1;    /* CKD Conversion */
 125                 unsigned char operation:3;      /* Operation mode */
 126                 unsigned char cfw:1;    /* Cache fast write */
 127                 unsigned char dfw:1;    /* DASD fast write */
 128         } __attribute__ ((packed)) attributes;
 129         __u16 blk_size;         /* Blocksize */
 130         __u16 fast_write_id;
 131         __u8 ga_additional;     /* Global Attributes Additional */
 132         __u8 ga_extended;       /* Global Attributes Extended   */
 133         struct ch_t beg_ext;
 134         struct ch_t end_ext;
 135         unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
 136         __u8 ep_format;        /* Extended Parameter format byte       */
 137         __u8 ep_prio;          /* Extended Parameter priority I/O byte */
 138         __u8 ep_reserved1;     /* Extended Parameter Reserved          */
 139         __u8 ep_rec_per_track; /* Number of records on a track         */
 140         __u8 ep_reserved[4];   /* Extended Parameter Reserved          */
 141 } __attribute__ ((packed));
 142
 143 struct LO_eckd_data {
 144         struct {
 145                 unsigned char orientation:2;
 146                 unsigned char operation:6;
 147         } __attribute__ ((packed)) operation;
 148         struct {
 149                 unsigned char last_bytes_used:1;
 150                 unsigned char reserved:6;
 151                 unsigned char read_count_suffix:1;
 152         } __attribute__ ((packed)) auxiliary;
 153         __u8 unused;
 154         __u8 count;
 155         struct ch_t seek_addr;
 156         struct chr_t search_arg;
 157         __u8 sector;
 158         __u16 length;
 159 } __attribute__ ((packed));
 160
 161 struct LRE_eckd_data {
 162         struct {
 163                 unsigned char orientation:2;
 164                 unsigned char operation:6;
 165         } __attribute__ ((packed)) operation;
 166         struct {
 167                 unsigned char length_valid:1;
 168                 unsigned char length_scope:1;
 169                 unsigned char imbedded_ccw_valid:1;
 170                 unsigned char check_bytes:2;
 171                 unsigned char imbedded_count_valid:1;
 172                 unsigned char reserved:1;
 173                 unsigned char read_count_suffix:1;
 174         } __attribute__ ((packed)) auxiliary;
 175         __u8 imbedded_ccw;
 176         __u8 count;
 177         struct ch_t seek_addr;
 178         struct chr_t search_arg;
 179         __u8 sector;
 180         __u16 length;
 181         __u8 imbedded_count;
 182         __u8 extended_operation;
 183         __u16 extended_parameter_length;
 184         __u8 extended_parameter[0];
 185 } __attribute__ ((packed));
 186
 187 /* Prefix data for format 0x00 and 0x01 */
 188 struct PFX_eckd_data {
 189         unsigned char format;
 190         struct {
 191                 unsigned char define_extent:1;
 192                 unsigned char time_stamp:1;
 193                 unsigned char verify_base:1;
 194                 unsigned char hyper_pav:1;
 195                 unsigned char reserved:4;
 196         } __attribute__ ((packed)) validity;
 197         __u8 base_address;
 198         __u8 aux;
 199         __u8 base_lss;
 200         __u8 reserved[7];
 201         struct DE_eckd_data define_extent;
 202         struct LRE_eckd_data locate_record;
 203 } __attribute__ ((packed));
 204
 205 struct dasd_eckd_characteristics {
 206         __u16 cu_type;
 207         struct {
 208                 unsigned char support:2;
 209                 unsigned char async:1;
 210                 unsigned char reserved:1;
 211                 unsigned char cache_info:1;
 212                 unsigned char model:3;
 213         } __attribute__ ((packed)) cu_model;
 214         __u16 dev_type;
 215         __u8 dev_model;
 216         struct {
 217                 unsigned char mult_burst:1;
 218                 unsigned char RT_in_LR:1;
 219                 unsigned char reserved1:1;
 220                 unsigned char RD_IN_LR:1;
 221                 unsigned char reserved2:4;
 222                 unsigned char reserved3:8;
 223                 unsigned char defect_wr:1;
 224                 unsigned char XRC_supported:1;
 225                 unsigned char reserved4:1;
 226                 unsigned char striping:1;
 227                 unsigned char reserved5:4;
 228                 unsigned char cfw:1;
 229                 unsigned char reserved6:2;
 230                 unsigned char cache:1;
 231                 unsigned char dual_copy:1;
 232                 unsigned char dfw:1;
 233                 unsigned char reset_alleg:1;
 234                 unsigned char sense_down:1;
 235         } __attribute__ ((packed)) facilities;
 236         __u8 dev_class;
 237         __u8 unit_type;
 238         __u16 no_cyl;
 239         __u16 trk_per_cyl;
 240         __u8 sec_per_trk;
 241         __u8 byte_per_track[3];
 242         __u16 home_bytes;
 243         __u8 formula;
 244         union {
 245                 struct {
 246                         __u8 f1;
 247                         __u16 f2;
 248                         __u16 f3;
 249                 } __attribute__ ((packed)) f_0x01;
 250                 struct {
 251                         __u8 f1;
 252                         __u8 f2;
 253                         __u8 f3;
 254                         __u8 f4;
 255                         __u8 f5;
 256                 } __attribute__ ((packed)) f_0x02;
 257         } __attribute__ ((packed)) factors;
 258         __u16 first_alt_trk;
 259         __u16 no_alt_trk;
 260         __u16 first_dia_trk;
 261         __u16 no_dia_trk;
 262         __u16 first_sup_trk;
 263         __u16 no_sup_trk;
 264         __u8 MDR_ID;
 265         __u8 OBR_ID;
 266         __u8 director;
 267         __u8 rd_trk_set;
 268         __u16 max_rec_zero;
 269         __u8 reserved1;
 270         __u8 RWANY_in_LR;
 271         __u8 factor6;
 272         __u8 factor7;
 273         __u8 factor8;
 274         __u8 reserved2[3];
 275         __u8 reserved3[6];
 276         __u32 long_no_cyl;
 277 } __attribute__ ((packed));
 278
 279 /* elements of the configuration data */
 280 struct dasd_ned {
 281         struct {
 282                 __u8 identifier:2;
 283                 __u8 token_id:1;
 284                 __u8 sno_valid:1;
 285                 __u8 subst_sno:1;
 286                 __u8 recNED:1;
 287                 __u8 emuNED:1;
 288                 __u8 reserved:1;
 289         } __attribute__ ((packed)) flags;
 290         __u8 descriptor;
 291         __u8 dev_class;
 292         __u8 reserved;
 293         __u8 dev_type[6];
 294         __u8 dev_model[3];
 295         __u8 HDA_manufacturer[3];
 296         __u8 HDA_location[2];
 297         __u8 HDA_seqno[12];
 298         __u8 ID;
 299         __u8 unit_addr;
 300 } __attribute__ ((packed));
 301
 302 struct dasd_sneq {
 303         struct {
 304                 __u8 identifier:2;
 305                 __u8 reserved:6;
 306         } __attribute__ ((packed)) flags;
 307         __u8 res1;
 308         __u16 format;
 309         __u8 res2[4];           /* byte  4- 7 */
 310         __u8 sua_flags;         /* byte  8    */
 311         __u8 base_unit_addr;    /* byte  9    */
 312         __u8 res3[22];          /* byte 10-31 */
 313 } __attribute__ ((packed));
 314
 315 struct vd_sneq {
 316         struct {
 317                 __u8 identifier:2;
 318                 __u8 reserved:6;
 319         } __attribute__ ((packed)) flags;
 320         __u8 res1;
 321         __u16 format;
 322         __u8 res2[4];   /* byte  4- 7 */
 323         __u8 uit[16];   /* byte  8-23 */
 324         __u8 res3[8];   /* byte 24-31 */
 325 } __attribute__ ((packed));
 326
 327 struct dasd_gneq {
 328         struct {
 329                 __u8 identifier:2;
 330                 __u8 reserved:6;
 331         } __attribute__ ((packed)) flags;
 332         __u8 reserved[5];
 333         struct {
 334                 __u8 value:2;
 335                 __u8 number:6;
 336         } __attribute__ ((packed)) timeout;
 337         __u8 reserved3;
 338         __u16 subsystemID;
 339         __u8 reserved2[22];
 340 } __attribute__ ((packed));
 341
 342 struct dasd_rssd_features {
 343         char feature[256];
 344 } __attribute__((packed));
 345
 346
 347 /*
 348  * Perform Subsystem Function - Prepare for Read Subsystem Data
 349  */
 350 struct dasd_psf_prssd_data {
 351         unsigned char order;
 352         unsigned char flags;
 353         unsigned char reserved[4];
 354         unsigned char suborder;
 355         unsigned char varies[5];
 356 } __attribute__ ((packed));
 357
 358 /*
 359  * Perform Subsystem Function - Set Subsystem Characteristics
 360  */
 361 struct dasd_psf_ssc_data {
 362         unsigned char order;
 363         unsigned char flags;
 364         unsigned char cu_type[4];
 365         unsigned char suborder;
 366         unsigned char reserved[59];
 367 } __attribute__((packed));
 368
 369
 370 /*
 371  * some structures and definitions for alias handling
 372  */
 373 struct dasd_unit_address_configuration {
 374         struct {
 375                 char ua_type;
 376                 char base_ua;
 377         } unit[256];
 378 } __attribute__((packed));
 379
 380
 381 #define MAX_DEVICES_PER_LCU 256
 382
 383 /* flags on the LCU  */
 384 #define NEED_UAC_UPDATE  0x01
 385 #define UPDATE_PENDING  0x02
 386
 387 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
 388
 389
 390 struct alias_root {
 391         struct list_head serverlist;
 392         spinlock_t lock;
 393 };
 394
 395 struct alias_server {
 396         struct list_head server;
 397         struct dasd_uid uid;
 398         struct list_head lculist;
 399 };
 400
 401 struct summary_unit_check_work_data {
 402         char reason;
 403         struct dasd_device *device;
 404         struct work_struct worker;
 405 };
 406
 407 struct read_uac_work_data {
 408         struct dasd_device *device;
 409         struct delayed_work dwork;
 410 };
 411
 412 struct alias_lcu {
 413         struct list_head lcu;
 414         struct dasd_uid uid;
 415         enum pavtype pav;
 416         char flags;
 417         spinlock_t lock;
 418         struct list_head grouplist;
 419         struct list_head active_devices;
 420         struct list_head inactive_devices;
 421         struct dasd_unit_address_configuration *uac;
 422         struct summary_unit_check_work_data suc_data;
 423         struct read_uac_work_data ruac_data;
 424         struct dasd_ccw_req *rsu_cqr;
 425         struct completion lcu_setup;
 426 };
 427
 428 struct alias_pav_group {
 429         struct list_head group;
 430         struct dasd_uid uid;
 431         struct alias_lcu *lcu;
 432         struct list_head baselist;
 433         struct list_head aliaslist;
 434         struct dasd_device *next;
 435 };
 436
 437 struct dasd_eckd_private {
 438         struct dasd_eckd_characteristics rdc_data;
 439         u8 *conf_data;
 440         int conf_len;
 441         /* pointers to specific parts in the conf_data */
 442         struct dasd_ned *ned;
 443         struct dasd_sneq *sneq;
 444         struct vd_sneq *vdsneq;
 445         struct dasd_gneq *gneq;
 446
 447         struct eckd_count count_area[5];
 448         int init_cqr_status;
 449         int uses_cdl;
 450         struct attrib_data_t attrib;    /* e.g. cache operations */
 451         struct dasd_rssd_features features;
 452         u32 real_cyl;
 453
 454         /* alias managemnet */
 455         struct dasd_uid uid;
 456         struct alias_pav_group *pavgroup;
 457         struct alias_lcu *lcu;
 458         int count;
 459
 460         u32 fcx_max_data;
 461 };
 462
 463
 464
 465 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
 466 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
 467 int dasd_alias_add_device(struct dasd_device *);
 468 int dasd_alias_remove_device(struct dasd_device *);
 469 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
 470 void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
 471 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
 472 void dasd_alias_lcu_setup_complete(struct dasd_device *);
 473 void dasd_alias_wait_for_lcu_setup(struct dasd_device *);
 474 int dasd_alias_update_add_device(struct dasd_device *);
 475 #endif                          /* DASD_ECKD_H */