1 /* 2 * File...........: linux/drivers/s390/block/dasd_int.h 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Horst Hummel <Horst.Hummel@de.ibm.com> 5 * Martin Schwidefsky <schwidefsky@de.ibm.com> 6 * Bugreports.to..: <Linux390@de.ibm.com> 7 * Copyright IBM Corp. 1999, 2009 8 */ 9 10 #ifndef DASD_INT_H 11 #define DASD_INT_H 12 13 #ifdef __KERNEL__ 14 15 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ 16 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) 17 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) 18 19 /* 20 * States a dasd device can have: 21 * new: the dasd_device structure is allocated. 22 * known: the discipline for the device is identified. 23 * basic: the device can do basic i/o. 24 * unfmt: the device could not be analyzed (format is unknown). 25 * ready: partition detection is done and the device is can do block io. 26 * online: the device accepts requests from the block device queue. 27 * 28 * Things to do for startup state transitions: 29 * new -> known: find discipline for the device and create devfs entries. 30 * known -> basic: request irq line for the device. 31 * basic -> ready: do the initial analysis, e.g. format detection, 32 * do block device setup and detect partitions. 33 * ready -> online: schedule the device tasklet. 34 * Things to do for shutdown state transitions: 35 * online -> ready: just set the new device state. 36 * ready -> basic: flush requests from the block device layer, clear 37 * partition information and reset format information. 38 * basic -> known: terminate all requests and free irq. 39 * known -> new: remove devfs entries and forget discipline. 40 */ 41 42 #define DASD_STATE_NEW 0 43 #define DASD_STATE_KNOWN 1 44 #define DASD_STATE_BASIC 2 45 #define DASD_STATE_UNFMT 3 46 #define DASD_STATE_READY 4 47 #define DASD_STATE_ONLINE 5 48 49 #include <linux/module.h> 50 #include <linux/wait.h> 51 #include <linux/blkdev.h> 52 #include <linux/genhd.h> 53 #include <linux/hdreg.h> 54 #include <linux/interrupt.h> 55 #include <linux/log2.h> 56 #include <asm/ccwdev.h> 57 #include <linux/workqueue.h> 58 #include <asm/debug.h> 59 #include <asm/dasd.h> 60 #include <asm/idals.h> 61 62 /* DASD discipline magic */ 63 #define DASD_ECKD_MAGIC 0xC5C3D2C4 64 #define DASD_DIAG_MAGIC 0xC4C9C1C7 65 #define DASD_FBA_MAGIC 0xC6C2C140 66 67 /* 68 * SECTION: Type definitions 69 */ 70 struct dasd_device; 71 struct dasd_block; 72 73 /* BIT DEFINITIONS FOR SENSE DATA */ 74 #define DASD_SENSE_BIT_0 0x80 75 #define DASD_SENSE_BIT_1 0x40 76 #define DASD_SENSE_BIT_2 0x20 77 #define DASD_SENSE_BIT_3 0x10 78 79 /* BIT DEFINITIONS FOR SIM SENSE */ 80 #define DASD_SIM_SENSE 0x0F 81 #define DASD_SIM_MSG_TO_OP 0x03 82 #define DASD_SIM_LOG 0x0C 83 84 /* lock class for nested cdev lock */ 85 #define CDEV_NESTED_FIRST 1 86 #define CDEV_NESTED_SECOND 2 87 88 /* 89 * SECTION: MACROs for klogd and s390 debug feature (dbf) 90 */ 91 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ 92 do { \ 93 debug_sprintf_event(d_device->debug_area, \ 94 d_level, \ 95 d_str "\n", \ 96 d_data); \ 97 } while(0) 98 99 #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ 100 do { \ 101 debug_sprintf_exception(d_device->debug_area, \ 102 d_level, \ 103 d_str "\n", \ 104 d_data); \ 105 } while(0) 106 107 #define DBF_EVENT(d_level, d_str, d_data...)\ 108 do { \ 109 debug_sprintf_event(dasd_debug_area, \ 110 d_level,\ 111 d_str "\n", \ 112 d_data); \ 113 } while(0) 114 115 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ 116 do { \ 117 struct ccw_dev_id __dev_id; \ 118 ccw_device_get_id(d_cdev, &__dev_id); \ 119 debug_sprintf_event(dasd_debug_area, \ 120 d_level, \ 121 "0.%x.%04x " d_str "\n", \ 122 __dev_id.ssid, __dev_id.devno, d_data); \ 123 } while (0) 124 125 #define DBF_EXC(d_level, d_str, d_data...)\ 126 do { \ 127 debug_sprintf_exception(dasd_debug_area, \ 128 d_level,\ 129 d_str "\n", \ 130 d_data); \ 131 } while(0) 132 133 /* limit size for an errorstring */ 134 #define ERRORLENGTH 30 135 136 /* definition of dbf debug levels */ 137 #define DBF_EMERG 0 /* system is unusable */ 138 #define DBF_ALERT 1 /* action must be taken immediately */ 139 #define DBF_CRIT 2 /* critical conditions */ 140 #define DBF_ERR 3 /* error conditions */ 141 #define DBF_WARNING 4 /* warning conditions */ 142 #define DBF_NOTICE 5 /* normal but significant condition */ 143 #define DBF_INFO 6 /* informational */ 144 #define DBF_DEBUG 6 /* debug-level messages */ 145 146 /* messages to be written via klogd and dbf */ 147 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ 148 do { \ 149 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 150 dev_name(&d_device->cdev->dev), d_args); \ 151 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 152 } while(0) 153 154 #define MESSAGE(d_loglevel,d_string,d_args...)\ 155 do { \ 156 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 157 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 158 } while(0) 159 160 /* messages to be written via klogd only */ 161 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ 162 do { \ 163 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 164 dev_name(&d_device->cdev->dev), d_args); \ 165 } while(0) 166 167 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 168 do { \ 169 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 170 } while(0) 171 172 struct dasd_ccw_req { 173 unsigned int magic; /* Eye catcher */ 174 struct list_head devlist; /* for dasd_device request queue */ 175 struct list_head blocklist; /* for dasd_block request queue */ 176 177 /* Where to execute what... */ 178 struct dasd_block *block; /* the originating block device */ 179 struct dasd_device *memdev; /* the device used to allocate this */ 180 struct dasd_device *startdev; /* device the request is started on */ 181 void *cpaddr; /* address of ccw or tcw */ 182 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 183 char status; /* status of this request */ 184 short retries; /* A retry counter */ 185 unsigned long flags; /* flags of this request */ 186 187 /* ... and how */ 188 unsigned long starttime; /* jiffies time of request start */ 189 unsigned long expires; /* expiration period in jiffies */ 190 char lpm; /* logical path mask */ 191 void *data; /* pointer to data area */ 192 193 /* these are important for recovering erroneous requests */ 194 int intrc; /* internal error, e.g. from start_IO */ 195 struct irb irb; /* device status in case of an error */ 196 struct dasd_ccw_req *refers; /* ERP-chain queueing. */ 197 void *function; /* originating ERP action */ 198 199 /* these are for statistics only */ 200 unsigned long long buildclk; /* TOD-clock of request generation */ 201 unsigned long long startclk; /* TOD-clock of request start */ 202 unsigned long long stopclk; /* TOD-clock of request interrupt */ 203 unsigned long long endclk; /* TOD-clock of request termination */ 204 205 /* Callback that is called after reaching final status. */ 206 void (*callback)(struct dasd_ccw_req *, void *data); 207 void *callback_data; 208 }; 209 210 /* 211 * dasd_ccw_req -> status can be: 212 */ 213 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 214 #define DASD_CQR_DONE 0x01 /* request is completed successfully */ 215 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ 216 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ 217 #define DASD_CQR_FAILED 0x04 /* request is finally failed */ 218 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ 219 220 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ 221 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ 222 #define DASD_CQR_ERROR 0x82 /* request is completed with error */ 223 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ 224 #define DASD_CQR_CLEARED 0x84 /* request was cleared */ 225 #define DASD_CQR_SUCCESS 0x85 /* request was successful */ 226 227 /* default expiration time*/ 228 #define DASD_EXPIRES 300 229 #define DASD_EXPIRES_MAX 40000000 230 231 /* per dasd_ccw_req flags */ 232 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 233 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ 234 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ 235 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was 236 * stolen. Should not be combined with 237 * DASD_CQR_FLAGS_USE_ERP 238 */ 239 240 /* Signature for error recovery functions. */ 241 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); 242 243 /* 244 * Unique identifier for dasd device. 245 */ 246 #define UA_NOT_CONFIGURED 0x00 247 #define UA_BASE_DEVICE 0x01 248 #define UA_BASE_PAV_ALIAS 0x02 249 #define UA_HYPER_PAV_ALIAS 0x03 250 251 struct dasd_uid { 252 __u8 type; 253 char vendor[4]; 254 char serial[15]; 255 __u16 ssid; 256 __u8 real_unit_addr; 257 __u8 base_unit_addr; 258 char vduit[33]; 259 }; 260 261 /* 262 * the struct dasd_discipline is 263 * sth like a table of virtual functions, if you think of dasd_eckd 264 * inheriting dasd... 265 * no, currently we are not planning to reimplement the driver in C++ 266 */ 267 struct dasd_discipline { 268 struct module *owner; 269 char ebcname[8]; /* a name used for tagging and printks */ 270 char name[8]; /* a name used for tagging and printks */ 271 int max_blocks; /* maximum number of blocks to be chained */ 272 273 struct list_head list; /* used for list of disciplines */ 274 275 /* 276 * Device recognition functions. check_device is used to verify 277 * the sense data and the information returned by read device 278 * characteristics. It returns 0 if the discipline can be used 279 * for the device in question. uncheck_device is called during 280 * device shutdown to deregister a device from its discipline. 281 */ 282 int (*check_device) (struct dasd_device *); 283 void (*uncheck_device) (struct dasd_device *); 284 285 /* 286 * do_analysis is used in the step from device state "basic" to 287 * state "accept". It returns 0 if the device can be made ready, 288 * it returns -EMEDIUMTYPE if the device can't be made ready or 289 * -EAGAIN if do_analysis started a ccw that needs to complete 290 * before the analysis may be repeated. 291 */ 292 int (*do_analysis) (struct dasd_block *); 293 294 /* 295 * This function is called, when new paths become available. 296 * Disciplins may use this callback to do necessary setup work, 297 * e.g. verify that new path is compatible with the current 298 * configuration. 299 */ 300 int (*verify_path)(struct dasd_device *, __u8); 301 302 /* 303 * Last things to do when a device is set online, and first things 304 * when it is set offline. 305 */ 306 int (*ready_to_online) (struct dasd_device *); 307 int (*online_to_ready) (struct dasd_device *); 308 309 /* 310 * Device operation functions. build_cp creates a ccw chain for 311 * a block device request, start_io starts the request and 312 * term_IO cancels it (e.g. in case of a timeout). format_device 313 * returns a ccw chain to be used to format the device. 314 * handle_terminated_request allows to examine a cqr and prepare 315 * it for retry. 316 */ 317 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 318 struct dasd_block *, 319 struct request *); 320 int (*start_IO) (struct dasd_ccw_req *); 321 int (*term_IO) (struct dasd_ccw_req *); 322 void (*handle_terminated_request) (struct dasd_ccw_req *); 323 struct dasd_ccw_req *(*format_device) (struct dasd_device *, 324 struct format_data_t *); 325 int (*free_cp) (struct dasd_ccw_req *, struct request *); 326 327 /* 328 * Error recovery functions. examine_error() returns a value that 329 * indicates what to do for an error condition. If examine_error() 330 * returns 'dasd_era_recover' erp_action() is called to create a 331 * special error recovery ccw. erp_postaction() is called after 332 * an error recovery ccw has finished its execution. dump_sense 333 * is called for every error condition to print the sense data 334 * to the console. 335 */ 336 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 337 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 338 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 339 struct irb *); 340 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); 341 void (*check_for_device_change) (struct dasd_device *, 342 struct dasd_ccw_req *, 343 struct irb *); 344 345 /* i/o control functions. */ 346 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 347 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 348 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 349 350 /* suspend/resume functions */ 351 int (*freeze) (struct dasd_device *); 352 int (*restore) (struct dasd_device *); 353 354 /* reload device after state change */ 355 int (*reload) (struct dasd_device *); 356 357 int (*get_uid) (struct dasd_device *, struct dasd_uid *); 358 }; 359 360 extern struct dasd_discipline *dasd_diag_discipline_pointer; 361 362 /* 363 * Notification numbers for extended error reporting notifications: 364 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 365 * eer pointer) is freed. The error reporting module needs to do all necessary 366 * cleanup steps. 367 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 368 */ 369 #define DASD_EER_DISABLE 0 370 #define DASD_EER_TRIGGER 1 371 372 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 373 #define DASD_EER_FATALERROR 1 374 #define DASD_EER_NOPATH 2 375 #define DASD_EER_STATECHANGE 3 376 #define DASD_EER_PPRCSUSPEND 4 377 378 struct dasd_path { 379 __u8 opm; 380 __u8 tbvpm; 381 __u8 ppm; 382 __u8 npm; 383 }; 384 385 struct dasd_device { 386 /* Block device stuff. */ 387 struct dasd_block *block; 388 389 unsigned int devindex; 390 unsigned long flags; /* per device flags */ 391 unsigned short features; /* copy of devmap-features (read-only!) */ 392 393 /* extended error reporting stuff (eer) */ 394 struct dasd_ccw_req *eer_cqr; 395 396 /* Device discipline stuff. */ 397 struct dasd_discipline *discipline; 398 struct dasd_discipline *base_discipline; 399 char *private; 400 struct dasd_path path_data; 401 402 /* Device state and target state. */ 403 int state, target; 404 struct mutex state_mutex; 405 int stopped; /* device (ccw_device_start) was stopped */ 406 407 /* reference count. */ 408 atomic_t ref_count; 409 410 /* ccw queue and memory for static ccw/erp buffers. */ 411 struct list_head ccw_queue; 412 spinlock_t mem_lock; 413 void *ccw_mem; 414 void *erp_mem; 415 struct list_head ccw_chunks; 416 struct list_head erp_chunks; 417 418 atomic_t tasklet_scheduled; 419 struct tasklet_struct tasklet; 420 struct work_struct kick_work; 421 struct work_struct restore_device; 422 struct work_struct reload_device; 423 struct timer_list timer; 424 425 debug_info_t *debug_area; 426 427 struct ccw_device *cdev; 428 429 /* hook for alias management */ 430 struct list_head alias_list; 431 432 /* default expiration time in s */ 433 unsigned long default_expires; 434 }; 435 436 struct dasd_block { 437 /* Block device stuff. */ 438 struct gendisk *gdp; 439 struct request_queue *request_queue; 440 spinlock_t request_queue_lock; 441 struct block_device *bdev; 442 atomic_t open_count; 443 444 unsigned long long blocks; /* size of volume in blocks */ 445 unsigned int bp_block; /* bytes per block */ 446 unsigned int s2b_shift; /* log2 (bp_block/512) */ 447 448 struct dasd_device *base; 449 struct list_head ccw_queue; 450 spinlock_t queue_lock; 451 452 atomic_t tasklet_scheduled; 453 struct tasklet_struct tasklet; 454 struct timer_list timer; 455 456 #ifdef CONFIG_DASD_PROFILE 457 struct dasd_profile_info_t profile; 458 #endif 459 }; 460 461 462 463 /* reasons why device (ccw_device_start) was stopped */ 464 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 465 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 466 #define DASD_STOPPED_PENDING 4 /* long busy */ 467 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 468 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 469 #define DASD_STOPPED_PM 32 /* pm state transition */ 470 #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ 471 472 /* per device flags */ 473 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 474 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 475 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 476 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't 477 * confuse this with the user specified 478 * read-only feature. 479 */ 480 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ 481 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ 482 483 484 void dasd_put_device_wake(struct dasd_device *); 485 486 /* 487 * Reference count inliners 488 */ 489 static inline void 490 dasd_get_device(struct dasd_device *device) 491 { 492 atomic_inc(&device->ref_count); 493 } 494 495 static inline void 496 dasd_put_device(struct dasd_device *device) 497 { 498 if (atomic_dec_return(&device->ref_count) == 0) 499 dasd_put_device_wake(device); 500 } 501 502 /* 503 * The static memory in ccw_mem and erp_mem is managed by a sorted 504 * list of free memory chunks. 505 */ 506 struct dasd_mchunk 507 { 508 struct list_head list; 509 unsigned long size; 510 } __attribute__ ((aligned(8))); 511 512 static inline void 513 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 514 unsigned long size) 515 { 516 struct dasd_mchunk *chunk; 517 518 INIT_LIST_HEAD(chunk_list); 519 chunk = (struct dasd_mchunk *) mem; 520 chunk->size = size - sizeof(struct dasd_mchunk); 521 list_add(&chunk->list, chunk_list); 522 } 523 524 static inline void * 525 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 526 { 527 struct dasd_mchunk *chunk, *tmp; 528 529 size = (size + 7L) & -8L; 530 list_for_each_entry(chunk, chunk_list, list) { 531 if (chunk->size < size) 532 continue; 533 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 534 char *endaddr = (char *) (chunk + 1) + chunk->size; 535 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 536 tmp->size = size; 537 chunk->size -= size + sizeof(struct dasd_mchunk); 538 chunk = tmp; 539 } else 540 list_del(&chunk->list); 541 return (void *) (chunk + 1); 542 } 543 return NULL; 544 } 545 546 static inline void 547 dasd_free_chunk(struct list_head *chunk_list, void *mem) 548 { 549 struct dasd_mchunk *chunk, *tmp; 550 struct list_head *p, *left; 551 552 chunk = (struct dasd_mchunk *) 553 ((char *) mem - sizeof(struct dasd_mchunk)); 554 /* Find out the left neighbour in chunk_list. */ 555 left = chunk_list; 556 list_for_each(p, chunk_list) { 557 if (list_entry(p, struct dasd_mchunk, list) > chunk) 558 break; 559 left = p; 560 } 561 /* Try to merge with right neighbour = next element from left. */ 562 if (left->next != chunk_list) { 563 tmp = list_entry(left->next, struct dasd_mchunk, list); 564 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 565 list_del(&tmp->list); 566 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 567 } 568 } 569 /* Try to merge with left neighbour. */ 570 if (left != chunk_list) { 571 tmp = list_entry(left, struct dasd_mchunk, list); 572 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 573 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 574 return; 575 } 576 } 577 __list_add(&chunk->list, left, left->next); 578 } 579 580 /* 581 * Check if bsize is in { 512, 1024, 2048, 4096 } 582 */ 583 static inline int 584 dasd_check_blocksize(int bsize) 585 { 586 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 587 return -EMEDIUMTYPE; 588 return 0; 589 } 590 591 /* externals in dasd.c */ 592 #define DASD_PROFILE_ON 1 593 #define DASD_PROFILE_OFF 0 594 595 extern debug_info_t *dasd_debug_area; 596 extern struct dasd_profile_info_t dasd_global_profile; 597 extern unsigned int dasd_profile_level; 598 extern const struct block_device_operations dasd_device_operations; 599 600 extern struct kmem_cache *dasd_page_cache; 601 602 struct dasd_ccw_req * 603 dasd_kmalloc_request(int , int, int, struct dasd_device *); 604 struct dasd_ccw_req * 605 dasd_smalloc_request(int , int, int, struct dasd_device *); 606 void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); 607 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 608 609 static inline int 610 dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) 611 { 612 return set_normalized_cda(ccw, cda); 613 } 614 615 struct dasd_device *dasd_alloc_device(void); 616 void dasd_free_device(struct dasd_device *); 617 618 struct dasd_block *dasd_alloc_block(void); 619 void dasd_free_block(struct dasd_block *); 620 621 void dasd_enable_device(struct dasd_device *); 622 void dasd_set_target_state(struct dasd_device *, int); 623 void dasd_kick_device(struct dasd_device *); 624 void dasd_restore_device(struct dasd_device *); 625 void dasd_reload_device(struct dasd_device *); 626 627 void dasd_add_request_head(struct dasd_ccw_req *); 628 void dasd_add_request_tail(struct dasd_ccw_req *); 629 int dasd_start_IO(struct dasd_ccw_req *); 630 int dasd_term_IO(struct dasd_ccw_req *); 631 void dasd_schedule_device_bh(struct dasd_device *); 632 void dasd_schedule_block_bh(struct dasd_block *); 633 int dasd_sleep_on(struct dasd_ccw_req *); 634 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 635 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 636 void dasd_device_set_timer(struct dasd_device *, int); 637 void dasd_device_clear_timer(struct dasd_device *); 638 void dasd_block_set_timer(struct dasd_block *, int); 639 void dasd_block_clear_timer(struct dasd_block *); 640 int dasd_cancel_req(struct dasd_ccw_req *); 641 int dasd_flush_device_queue(struct dasd_device *); 642 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 643 void dasd_generic_remove (struct ccw_device *cdev); 644 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 645 int dasd_generic_set_offline (struct ccw_device *cdev); 646 int dasd_generic_notify(struct ccw_device *, int); 647 int dasd_generic_last_path_gone(struct dasd_device *); 648 int dasd_generic_path_operational(struct dasd_device *); 649 650 void dasd_generic_handle_state_change(struct dasd_device *); 651 int dasd_generic_pm_freeze(struct ccw_device *); 652 int dasd_generic_restore_device(struct ccw_device *); 653 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); 654 void dasd_generic_path_event(struct ccw_device *, int *); 655 int dasd_generic_verify_path(struct dasd_device *, __u8); 656 657 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); 658 char *dasd_get_sense(struct irb *); 659 660 void dasd_device_set_stop_bits(struct dasd_device *, int); 661 void dasd_device_remove_stop_bits(struct dasd_device *, int); 662 663 int dasd_device_is_ro(struct dasd_device *); 664 665 666 /* externals in dasd_devmap.c */ 667 extern int dasd_max_devindex; 668 extern int dasd_probeonly; 669 extern int dasd_autodetect; 670 extern int dasd_nopav; 671 extern int dasd_nofcx; 672 673 int dasd_devmap_init(void); 674 void dasd_devmap_exit(void); 675 676 struct dasd_device *dasd_create_device(struct ccw_device *); 677 void dasd_delete_device(struct dasd_device *); 678 679 int dasd_get_feature(struct ccw_device *, int); 680 int dasd_set_feature(struct ccw_device *, int, int); 681 682 int dasd_add_sysfs_files(struct ccw_device *); 683 void dasd_remove_sysfs_files(struct ccw_device *); 684 685 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 686 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 687 struct dasd_device *dasd_device_from_devindex(int); 688 689 int dasd_parse(void); 690 int dasd_busid_known(const char *); 691 692 /* externals in dasd_gendisk.c */ 693 int dasd_gendisk_init(void); 694 void dasd_gendisk_exit(void); 695 int dasd_gendisk_alloc(struct dasd_block *); 696 void dasd_gendisk_free(struct dasd_block *); 697 int dasd_scan_partitions(struct dasd_block *); 698 void dasd_destroy_partitions(struct dasd_block *); 699 700 /* externals in dasd_ioctl.c */ 701 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 702 703 /* externals in dasd_proc.c */ 704 int dasd_proc_init(void); 705 void dasd_proc_exit(void); 706 707 /* externals in dasd_erp.c */ 708 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 709 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 710 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 711 struct dasd_device *); 712 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 713 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 714 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 715 716 /* externals in dasd_3990_erp.c */ 717 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 718 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 719 720 /* externals in dasd_eer.c */ 721 #ifdef CONFIG_DASD_EER 722 int dasd_eer_init(void); 723 void dasd_eer_exit(void); 724 int dasd_eer_enable(struct dasd_device *); 725 void dasd_eer_disable(struct dasd_device *); 726 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 727 unsigned int id); 728 void dasd_eer_snss(struct dasd_device *); 729 730 static inline int dasd_eer_enabled(struct dasd_device *device) 731 { 732 return device->eer_cqr != NULL; 733 } 734 #else 735 #define dasd_eer_init() (0) 736 #define dasd_eer_exit() do { } while (0) 737 #define dasd_eer_enable(d) (0) 738 #define dasd_eer_disable(d) do { } while (0) 739 #define dasd_eer_write(d,c,i) do { } while (0) 740 #define dasd_eer_snss(d) do { } while (0) 741 #define dasd_eer_enabled(d) (0) 742 #endif /* CONFIG_DASD_ERR */ 743 744 #endif /* __KERNEL__ */ 745 746 #endif /* DASD_H */ 747