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