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 */ 476