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_RSSD               0x3e
  31 #define DASD_ECKD_CCW_LOCATE_RECORD      0x47
  32 #define DASD_ECKD_CCW_SNSS               0x54
  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
  38 #define DASD_ECKD_CCW_RELEASE            0x94
  39 #define DASD_ECKD_CCW_READ_CKD_MT        0x9e
  40 #define DASD_ECKD_CCW_WRITE_CKD_MT       0x9d
  41 #define DASD_ECKD_CCW_RESERVE            0xB4
  42 #define DASD_ECKD_CCW_PFX                0xE7
  43 #define DASD_ECKD_CCW_RSCK               0xF9
  44
  45 /*
  46  * Perform Subsystem Function / Sub-Orders
  47  */
  48 #define PSF_ORDER_PRSSD 0x18
  49 #define PSF_ORDER_SSC   0x1D
  50
  51 /*****************************************************************************
  52  * SECTION: Type Definitions
  53  ****************************************************************************/
  54
  55 struct eckd_count {
  56         __u16 cyl;
  57         __u16 head;
  58         __u8 record;
  59         __u8 kl;
  60         __u16 dl;
  61 } __attribute__ ((packed));
  62
  63 struct ch_t {
  64         __u16 cyl;
  65         __u16 head;
  66 } __attribute__ ((packed));
  67
  68 struct chs_t {
  69         __u16 cyl;
  70         __u16 head;
  71         __u32 sector;
  72 } __attribute__ ((packed));
  73
  74 struct chr_t {
  75         __u16 cyl;
  76         __u16 head;
  77         __u8 record;
  78 } __attribute__ ((packed));
  79
  80 struct geom_t {
  81         __u16 cyl;
  82         __u16 head;
  83         __u32 sector;
  84 } __attribute__ ((packed));
  85
  86 struct eckd_home {
  87         __u8 skip_control[14];
  88         __u16 cell_number;
  89         __u8 physical_addr[3];
  90         __u8 flag;
  91         struct ch_t track_addr;
  92         __u8 reserved;
  93         __u8 key_length;
  94         __u8 reserved2[2];
  95 } __attribute__ ((packed));
  96
  97 struct DE_eckd_data {
  98         struct {
  99                 unsigned char perm:2;   /* Permissions on this extent */
 100                 unsigned char reserved:1;
 101                 unsigned char seek:2;   /* Seek control */
 102                 unsigned char auth:2;   /* Access authorization */
 103                 unsigned char pci:1;    /* PCI Fetch mode */
 104         } __attribute__ ((packed)) mask;
 105         struct {
 106                 unsigned char mode:2;   /* Architecture mode */
 107                 unsigned char ckd:1;    /* CKD Conversion */
 108                 unsigned char operation:3;      /* Operation mode */
 109                 unsigned char cfw:1;    /* Cache fast write */
 110                 unsigned char dfw:1;    /* DASD fast write */
 111         } __attribute__ ((packed)) attributes;
 112         __u16 blk_size;         /* Blocksize */
 113         __u16 fast_write_id;
 114         __u8 ga_additional;     /* Global Attributes Additional */
 115         __u8 ga_extended;       /* Global Attributes Extended   */
 116         struct ch_t beg_ext;
 117         struct ch_t end_ext;
 118         unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
 119         __u8 ep_format;        /* Extended Parameter format byte       */
 120         __u8 ep_prio;          /* Extended Parameter priority I/O byte */
 121         __u8 ep_reserved[6];   /* Extended Parameter Reserved          */
 122 } __attribute__ ((packed));
 123
 124 struct LO_eckd_data {
 125         struct {
 126                 unsigned char orientation:2;
 127                 unsigned char operation:6;
 128         } __attribute__ ((packed)) operation;
 129         struct {
 130                 unsigned char last_bytes_used:1;
 131                 unsigned char reserved:6;
 132                 unsigned char read_count_suffix:1;
 133         } __attribute__ ((packed)) auxiliary;
 134         __u8 unused;
 135         __u8 count;
 136         struct ch_t seek_addr;
 137         struct chr_t search_arg;
 138         __u8 sector;
 139         __u16 length;
 140 } __attribute__ ((packed));
 141
 142 /* Prefix data for format 0x00 and 0x01 */
 143 struct PFX_eckd_data {
 144         unsigned char format;
 145         struct {
 146                 unsigned char define_extend:1;
 147                 unsigned char time_stamp:1;
 148                 unsigned char verify_base:1;
 149                 unsigned char hyper_pav:1;
 150                 unsigned char reserved:4;
 151         } __attribute__ ((packed)) validity;
 152         __u8 base_address;
 153         __u8 aux;
 154         __u8 base_lss;
 155         __u8 reserved[7];
 156         struct DE_eckd_data define_extend;
 157         struct LO_eckd_data locate_record;
 158         __u8 LO_extended_data[4];
 159 } __attribute__ ((packed));
 160
 161 struct dasd_eckd_characteristics {
 162         __u16 cu_type;
 163         struct {
 164                 unsigned char support:2;
 165                 unsigned char async:1;
 166                 unsigned char reserved:1;
 167                 unsigned char cache_info:1;
 168                 unsigned char model:3;
 169         } __attribute__ ((packed)) cu_model;
 170         __u16 dev_type;
 171         __u8 dev_model;
 172         struct {
 173                 unsigned char mult_burst:1;
 174                 unsigned char RT_in_LR:1;
 175                 unsigned char reserved1:1;
 176                 unsigned char RD_IN_LR:1;
 177                 unsigned char reserved2:4;
 178                 unsigned char reserved3:8;
 179                 unsigned char defect_wr:1;
 180                 unsigned char XRC_supported:1;
 181                 unsigned char reserved4:1;
 182                 unsigned char striping:1;
 183                 unsigned char reserved5:4;
 184                 unsigned char cfw:1;
 185                 unsigned char reserved6:2;
 186                 unsigned char cache:1;
 187                 unsigned char dual_copy:1;
 188                 unsigned char dfw:1;
 189                 unsigned char reset_alleg:1;
 190                 unsigned char sense_down:1;
 191         } __attribute__ ((packed)) facilities;
 192         __u8 dev_class;
 193         __u8 unit_type;
 194         __u16 no_cyl;
 195         __u16 trk_per_cyl;
 196         __u8 sec_per_trk;
 197         __u8 byte_per_track[3];
 198         __u16 home_bytes;
 199         __u8 formula;
 200         union {
 201                 struct {
 202                         __u8 f1;
 203                         __u16 f2;
 204                         __u16 f3;
 205                 } __attribute__ ((packed)) f_0x01;
 206                 struct {
 207                         __u8 f1;
 208                         __u8 f2;
 209                         __u8 f3;
 210                         __u8 f4;
 211                         __u8 f5;
 212                 } __attribute__ ((packed)) f_0x02;
 213         } __attribute__ ((packed)) factors;
 214         __u16 first_alt_trk;
 215         __u16 no_alt_trk;
 216         __u16 first_dia_trk;
 217         __u16 no_dia_trk;
 218         __u16 first_sup_trk;
 219         __u16 no_sup_trk;
 220         __u8 MDR_ID;
 221         __u8 OBR_ID;
 222         __u8 director;
 223         __u8 rd_trk_set;
 224         __u16 max_rec_zero;
 225         __u8 reserved1;
 226         __u8 RWANY_in_LR;
 227         __u8 factor6;
 228         __u8 factor7;
 229         __u8 factor8;
 230         __u8 reserved2[3];
 231         __u8 reserved3[10];
 232 } __attribute__ ((packed));
 233
 234 struct dasd_eckd_confdata {
 235         struct {
 236                 struct {
 237                         unsigned char identifier:2;
 238                         unsigned char token_id:1;
 239                         unsigned char sno_valid:1;
 240                         unsigned char subst_sno:1;
 241                         unsigned char recNED:1;
 242                         unsigned char emuNED:1;
 243                         unsigned char reserved:1;
 244                 } __attribute__ ((packed)) flags;
 245                 __u8 descriptor;
 246                 __u8 dev_class;
 247                 __u8 reserved;
 248                 unsigned char dev_type[6];
 249                 unsigned char dev_model[3];
 250                 unsigned char HDA_manufacturer[3];
 251                 unsigned char HDA_location[2];
 252                 unsigned char HDA_seqno[12];
 253                 __u8 ID;
 254                 __u8 unit_addr;
 255         } __attribute__ ((packed)) ned1;
 256         union {
 257                 struct {
 258                         struct {
 259                                 unsigned char identifier:2;
 260                                 unsigned char token_id:1;
 261                                 unsigned char sno_valid:1;
 262                                 unsigned char subst_sno:1;
 263                                 unsigned char recNED:1;
 264                                 unsigned char emuNED:1;
 265                                 unsigned char reserved:1;
 266                         } __attribute__ ((packed)) flags;
 267                         __u8 descriptor;
 268                         __u8 reserved[2];
 269                         unsigned char dev_type[6];
 270                         unsigned char dev_model[3];
 271                         unsigned char DASD_manufacturer[3];
 272                         unsigned char DASD_location[2];
 273                         unsigned char DASD_seqno[12];
 274                         __u16 ID;
 275                 } __attribute__ ((packed)) ned;
 276                 struct {
 277                         unsigned char flags;            /* byte  0    */
 278                         unsigned char res1;             /* byte  1    */
 279                         __u16 format;                   /* byte  2-3  */
 280                         unsigned char res2[4];          /* byte  4-7  */
 281                         unsigned char sua_flags;        /* byte  8    */
 282                         __u8 base_unit_addr;            /* byte  9    */
 283                         unsigned char res3[22];         /* byte 10-31 */
 284                 } __attribute__ ((packed)) sneq;
 285         } __attribute__ ((packed)) ned2;
 286         struct {
 287                 struct {
 288                         unsigned char identifier:2;
 289                         unsigned char token_id:1;
 290                         unsigned char sno_valid:1;
 291                         unsigned char subst_sno:1;
 292                         unsigned char recNED:1;
 293                         unsigned char emuNED:1;
 294                         unsigned char reserved:1;
 295                 } __attribute__ ((packed)) flags;
 296                 __u8 descriptor;
 297                 __u8 reserved[2];
 298                 unsigned char cont_type[6];
 299                 unsigned char cont_model[3];
 300                 unsigned char cont_manufacturer[3];
 301                 unsigned char cont_location[2];
 302                 unsigned char cont_seqno[12];
 303                 __u16 ID;
 304         } __attribute__ ((packed)) ned3;
 305         struct {
 306                 struct {
 307                         unsigned char identifier:2;
 308                         unsigned char token_id:1;
 309                         unsigned char sno_valid:1;
 310                         unsigned char subst_sno:1;
 311                         unsigned char recNED:1;
 312                         unsigned char emuNED:1;
 313                         unsigned char reserved:1;
 314                 } __attribute__ ((packed)) flags;
 315                 __u8 descriptor;
 316                 __u8 reserved[2];
 317                 unsigned char cont_type[6];
 318                 unsigned char empty[3];
 319                 unsigned char cont_manufacturer[3];
 320                 unsigned char cont_location[2];
 321                 unsigned char cont_seqno[12];
 322                 __u16 ID;
 323         } __attribute__ ((packed)) ned4;
 324         unsigned char ned5[32];
 325         unsigned char ned6[32];
 326         unsigned char ned7[32];
 327         struct {
 328                 struct {
 329                         unsigned char identifier:2;
 330                         unsigned char reserved:6;
 331                 } __attribute__ ((packed)) flags;
 332                 __u8 selector;
 333                 __u16 interfaceID;
 334                 __u32 reserved;
 335                 __u16 subsystemID;
 336                 struct {
 337                         unsigned char sp0:1;
 338                         unsigned char sp1:1;
 339                         unsigned char reserved:5;
 340                         unsigned char scluster:1;
 341                 } __attribute__ ((packed)) spathID;
 342                 __u8 unit_address;
 343                 __u8 dev_ID;
 344                 __u8 dev_address;
 345                 __u8 adapterID;
 346                 __u16 link_address;
 347                 struct {
 348                         unsigned char parallel:1;
 349                         unsigned char escon:1;
 350                         unsigned char reserved:1;
 351                         unsigned char ficon:1;
 352                         unsigned char reserved2:4;
 353                 } __attribute__ ((packed)) protocol_type;
 354                 struct {
 355                         unsigned char PID_in_236:1;
 356                         unsigned char reserved:7;
 357                 } __attribute__ ((packed)) format_flags;
 358                 __u8 log_dev_address;
 359                 unsigned char reserved2[12];
 360         } __attribute__ ((packed)) neq;
 361 } __attribute__ ((packed));
 362
 363 struct dasd_eckd_path {
 364         __u8 opm;
 365         __u8 ppm;
 366         __u8 npm;
 367 };
 368
 369 struct dasd_rssd_features {
 370         char feature[256];
 371 } __attribute__((packed));
 372
 373
 374 /*
 375  * Perform Subsystem Function - Prepare for Read Subsystem Data
 376  */
 377 struct dasd_psf_prssd_data {
 378         unsigned char order;
 379         unsigned char flags;
 380         unsigned char reserved[4];
 381         unsigned char suborder;
 382         unsigned char varies[9];
 383 } __attribute__ ((packed));
 384
 385 /*
 386  * Perform Subsystem Function - Set Subsystem Characteristics
 387  */
 388 struct dasd_psf_ssc_data {
 389         unsigned char order;
 390         unsigned char flags;
 391         unsigned char cu_type[4];
 392         unsigned char suborder;
 393         unsigned char reserved[59];
 394 } __attribute__((packed));
 395
 396
 397 /*
 398  * some structures and definitions for alias handling
 399  */
 400 struct dasd_unit_address_configuration {
 401         struct {
 402                 char ua_type;
 403                 char base_ua;
 404         } unit[256];
 405 } __attribute__((packed));
 406
 407
 408 #define MAX_DEVICES_PER_LCU 256
 409
 410 /* flags on the LCU  */
 411 #define NEED_UAC_UPDATE  0x01
 412 #define UPDATE_PENDING  0x02
 413
 414 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
 415
 416
 417 struct alias_root {
 418         struct list_head serverlist;
 419         spinlock_t lock;
 420 };
 421
 422 struct alias_server {
 423         struct list_head server;
 424         struct dasd_uid uid;
 425         struct list_head lculist;
 426 };
 427
 428 struct summary_unit_check_work_data {
 429         char reason;
 430         struct dasd_device *device;
 431         struct work_struct worker;
 432 };
 433
 434 struct read_uac_work_data {
 435         struct dasd_device *device;
 436         struct delayed_work dwork;
 437 };
 438
 439 struct alias_lcu {
 440         struct list_head lcu;
 441         struct dasd_uid uid;
 442         enum pavtype pav;
 443         char flags;
 444         spinlock_t lock;
 445         struct list_head grouplist;
 446         struct list_head active_devices;
 447         struct list_head inactive_devices;
 448         struct dasd_unit_address_configuration *uac;
 449         struct summary_unit_check_work_data suc_data;
 450         struct read_uac_work_data ruac_data;
 451         struct dasd_ccw_req *rsu_cqr;
 452 };
 453
 454 struct alias_pav_group {
 455         struct list_head group;
 456         struct dasd_uid uid;
 457         struct alias_lcu *lcu;
 458         struct list_head baselist;
 459         struct list_head aliaslist;
 460         struct dasd_device *next;
 461 };
 462
 463
 464 struct dasd_eckd_private {
 465         struct dasd_eckd_characteristics rdc_data;
 466         struct dasd_eckd_confdata conf_data;
 467         struct dasd_eckd_path path_data;
 468         struct eckd_count count_area[5];
 469         int init_cqr_status;
 470         int uses_cdl;
 471         struct attrib_data_t attrib;    /* e.g. cache operations */
 472         struct dasd_rssd_features features;
 473
 474         /* alias managemnet */
 475         struct dasd_uid uid;
 476         struct alias_pav_group *pavgroup;
 477         struct alias_lcu *lcu;
 478         int count;
 479 };
 480
 481
 482
 483 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
 484 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
 485 int dasd_alias_add_device(struct dasd_device *);
 486 int dasd_alias_remove_device(struct dasd_device *);
 487 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
 488 void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
 489 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
 490
 491 #endif                          /* DASD_ECKD_H */