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