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