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