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 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 8 * 9 */ 10 11 #ifndef DASD_INT_H 12 #define DASD_INT_H 13 14 #ifdef __KERNEL__ 15 16 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ 17 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) 18 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) 19 20 /* 21 * States a dasd device can have: 22 * new: the dasd_device structure is allocated. 23 * known: the discipline for the device is identified. 24 * basic: the device can do basic i/o. 25 * unfmt: the device could not be analyzed (format is unknown). 26 * ready: partition detection is done and the device is can do block io. 27 * online: the device accepts requests from the block device queue. 28 * 29 * Things to do for startup state transitions: 30 * new -> known: find discipline for the device and create devfs entries. 31 * known -> basic: request irq line for the device. 32 * basic -> ready: do the initial analysis, e.g. format detection, 33 * do block device setup and detect partitions. 34 * ready -> online: schedule the device tasklet. 35 * Things to do for shutdown state transitions: 36 * online -> ready: just set the new device state. 37 * ready -> basic: flush requests from the block device layer, clear 38 * partition information and reset format information. 39 * basic -> known: terminate all requests and free irq. 40 * known -> new: remove devfs entries and forget discipline. 41 */ 42 43 #define DASD_STATE_NEW 0 44 #define DASD_STATE_KNOWN 1 45 #define DASD_STATE_BASIC 2 46 #define DASD_STATE_UNFMT 3 47 #define DASD_STATE_READY 4 48 #define DASD_STATE_ONLINE 5 49 50 #include <linux/module.h> 51 #include <linux/wait.h> 52 #include <linux/blkdev.h> 53 #include <linux/genhd.h> 54 #include <linux/hdreg.h> 55 #include <linux/interrupt.h> 56 #include <linux/log2.h> 57 #include <asm/ccwdev.h> 58 #include <linux/workqueue.h> 59 #include <asm/debug.h> 60 #include <asm/dasd.h> 61 #include <asm/idals.h> 62 63 /* 64 * SECTION: Type definitions 65 */ 66 struct dasd_device; 67 struct dasd_block; 68 69 /* BIT DEFINITIONS FOR SENSE DATA */ 70 #define DASD_SENSE_BIT_0 0x80 71 #define DASD_SENSE_BIT_1 0x40 72 #define DASD_SENSE_BIT_2 0x20 73 #define DASD_SENSE_BIT_3 0x10 74 75 /* BIT DEFINITIONS FOR SIM SENSE */ 76 #define DASD_SIM_SENSE 0x0F 77 #define DASD_SIM_MSG_TO_OP 0x03 78 #define DASD_SIM_LOG 0x0C 79 80 /* 81 * SECTION: MACROs for klogd and s390 debug feature (dbf) 82 */ 83 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ 84 do { \ 85 debug_sprintf_event(d_device->debug_area, \ 86 d_level, \ 87 d_str "\n", \ 88 d_data); \ 89 } while(0) 90 91 #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ 92 do { \ 93 debug_sprintf_exception(d_device->debug_area, \ 94 d_level, \ 95 d_str "\n", \ 96 d_data); \ 97 } while(0) 98 99 #define DBF_EVENT(d_level, d_str, d_data...)\ 100 do { \ 101 debug_sprintf_event(dasd_debug_area, \ 102 d_level,\ 103 d_str "\n", \ 104 d_data); \ 105 } while(0) 106 107 #define DBF_EXC(d_level, d_str, d_data...)\ 108 do { \ 109 debug_sprintf_exception(dasd_debug_area, \ 110 d_level,\ 111 d_str "\n", \ 112 d_data); \ 113 } while(0) 114 115 /* limit size for an errorstring */ 116 #define ERRORLENGTH 30 117 118 /* definition of dbf debug levels */ 119 #define DBF_EMERG 0 /* system is unusable */ 120 #define DBF_ALERT 1 /* action must be taken immediately */ 121 #define DBF_CRIT 2 /* critical conditions */ 122 #define DBF_ERR 3 /* error conditions */ 123 #define DBF_WARNING 4 /* warning conditions */ 124 #define DBF_NOTICE 5 /* normal but significant condition */ 125 #define DBF_INFO 6 /* informational */ 126 #define DBF_DEBUG 6 /* debug-level messages */ 127 128 /* messages to be written via klogd and dbf */ 129 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ 130 do { \ 131 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ 132 dev_name(&d_device->cdev->dev), d_args); \ 133 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ 134 } while(0) 135 136 #define MESSAGE(d_loglevel,d_string,d_args...)\ 137 do { \ 138 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 139 DBF_EVENT(DBF_ALERT, d_string, d_args); \ 140 } while(0) 141 142 /* messages to be written via klogd only */ 143 #define DEV_MESSAGE_LOG(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 } while(0) 148 149 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ 150 do { \ 151 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ 152 } while(0) 153 154 struct dasd_ccw_req { 155 unsigned int magic; /* Eye catcher */ 156 struct list_head devlist; /* for dasd_device request queue */ 157 struct list_head blocklist; /* for dasd_block request queue */ 158 159 /* Where to execute what... */ 160 struct dasd_block *block; /* the originating block device */ 161 struct dasd_device *memdev; /* the device used to allocate this */ 162 struct dasd_device *startdev; /* device the request is started on */ 163 void *cpaddr; /* address of ccw or tcw */ 164 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ 165 char status; /* status of this request */ 166 short retries; /* A retry counter */ 167 unsigned long flags; /* flags of this request */ 168 169 /* ... and how */ 170 unsigned long starttime; /* jiffies time of request start */ 171 int expires; /* expiration period in jiffies */ 172 char lpm; /* logical path mask */ 173 void *data; /* pointer to data area */ 174 175 /* these are important for recovering erroneous requests */ 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 dasd_ccw_req *, 288 struct irb *, char *); 289 290 void (*handle_unsolicited_interrupt) (struct dasd_device *, 291 struct irb *); 292 293 /* i/o control functions. */ 294 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); 295 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 296 int (*ioctl) (struct dasd_block *, unsigned int, void __user *); 297 }; 298 299 extern struct dasd_discipline *dasd_diag_discipline_pointer; 300 301 /* 302 * Unique identifier for dasd device. 303 */ 304 #define UA_NOT_CONFIGURED 0x00 305 #define UA_BASE_DEVICE 0x01 306 #define UA_BASE_PAV_ALIAS 0x02 307 #define UA_HYPER_PAV_ALIAS 0x03 308 309 struct dasd_uid { 310 __u8 type; 311 char vendor[4]; 312 char serial[15]; 313 __u16 ssid; 314 __u8 real_unit_addr; 315 __u8 base_unit_addr; 316 char vduit[33]; 317 }; 318 319 /* 320 * Notification numbers for extended error reporting notifications: 321 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's 322 * eer pointer) is freed. The error reporting module needs to do all necessary 323 * cleanup steps. 324 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). 325 */ 326 #define DASD_EER_DISABLE 0 327 #define DASD_EER_TRIGGER 1 328 329 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ 330 #define DASD_EER_FATALERROR 1 331 #define DASD_EER_NOPATH 2 332 #define DASD_EER_STATECHANGE 3 333 #define DASD_EER_PPRCSUSPEND 4 334 335 struct dasd_device { 336 /* Block device stuff. */ 337 struct dasd_block *block; 338 339 unsigned int devindex; 340 unsigned long flags; /* per device flags */ 341 unsigned short features; /* copy of devmap-features (read-only!) */ 342 343 /* extended error reporting stuff (eer) */ 344 struct dasd_ccw_req *eer_cqr; 345 346 /* Device discipline stuff. */ 347 struct dasd_discipline *discipline; 348 struct dasd_discipline *base_discipline; 349 char *private; 350 351 /* Device state and target state. */ 352 int state, target; 353 int stopped; /* device (ccw_device_start) was stopped */ 354 355 /* reference count. */ 356 atomic_t ref_count; 357 358 /* ccw queue and memory for static ccw/erp buffers. */ 359 struct list_head ccw_queue; 360 spinlock_t mem_lock; 361 void *ccw_mem; 362 void *erp_mem; 363 struct list_head ccw_chunks; 364 struct list_head erp_chunks; 365 366 atomic_t tasklet_scheduled; 367 struct tasklet_struct tasklet; 368 struct work_struct kick_work; 369 struct timer_list timer; 370 371 debug_info_t *debug_area; 372 373 struct ccw_device *cdev; 374 375 /* hook for alias management */ 376 struct list_head alias_list; 377 }; 378 379 struct dasd_block { 380 /* Block device stuff. */ 381 struct gendisk *gdp; 382 struct request_queue *request_queue; 383 spinlock_t request_queue_lock; 384 struct block_device *bdev; 385 atomic_t open_count; 386 387 unsigned long long blocks; /* size of volume in blocks */ 388 unsigned int bp_block; /* bytes per block */ 389 unsigned int s2b_shift; /* log2 (bp_block/512) */ 390 391 struct dasd_device *base; 392 struct list_head ccw_queue; 393 spinlock_t queue_lock; 394 395 atomic_t tasklet_scheduled; 396 struct tasklet_struct tasklet; 397 struct timer_list timer; 398 399 #ifdef CONFIG_DASD_PROFILE 400 struct dasd_profile_info_t profile; 401 #endif 402 }; 403 404 405 406 /* reasons why device (ccw_device_start) was stopped */ 407 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 408 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 409 #define DASD_STOPPED_PENDING 4 /* long busy */ 410 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 411 #define DASD_STOPPED_SU 16 /* summary unit check handling */ 412 413 /* per device flags */ 414 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 415 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 416 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 417 418 void dasd_put_device_wake(struct dasd_device *); 419 420 /* 421 * Reference count inliners 422 */ 423 static inline void 424 dasd_get_device(struct dasd_device *device) 425 { 426 atomic_inc(&device->ref_count); 427 } 428 429 static inline void 430 dasd_put_device(struct dasd_device *device) 431 { 432 if (atomic_dec_return(&device->ref_count) == 0) 433 dasd_put_device_wake(device); 434 } 435 436 /* 437 * The static memory in ccw_mem and erp_mem is managed by a sorted 438 * list of free memory chunks. 439 */ 440 struct dasd_mchunk 441 { 442 struct list_head list; 443 unsigned long size; 444 } __attribute__ ((aligned(8))); 445 446 static inline void 447 dasd_init_chunklist(struct list_head *chunk_list, void *mem, 448 unsigned long size) 449 { 450 struct dasd_mchunk *chunk; 451 452 INIT_LIST_HEAD(chunk_list); 453 chunk = (struct dasd_mchunk *) mem; 454 chunk->size = size - sizeof(struct dasd_mchunk); 455 list_add(&chunk->list, chunk_list); 456 } 457 458 static inline void * 459 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) 460 { 461 struct dasd_mchunk *chunk, *tmp; 462 463 size = (size + 7L) & -8L; 464 list_for_each_entry(chunk, chunk_list, list) { 465 if (chunk->size < size) 466 continue; 467 if (chunk->size > size + sizeof(struct dasd_mchunk)) { 468 char *endaddr = (char *) (chunk + 1) + chunk->size; 469 tmp = (struct dasd_mchunk *) (endaddr - size) - 1; 470 tmp->size = size; 471 chunk->size -= size + sizeof(struct dasd_mchunk); 472 chunk = tmp; 473 } else 474 list_del(&chunk->list); 475 return (void *) (chunk + 1); 476 } 477 return NULL; 478 } 479 480 static inline void 481 dasd_free_chunk(struct list_head *chunk_list, void *mem) 482 { 483 struct dasd_mchunk *chunk, *tmp; 484 struct list_head *p, *left; 485 486 chunk = (struct dasd_mchunk *) 487 ((char *) mem - sizeof(struct dasd_mchunk)); 488 /* Find out the left neighbour in chunk_list. */ 489 left = chunk_list; 490 list_for_each(p, chunk_list) { 491 if (list_entry(p, struct dasd_mchunk, list) > chunk) 492 break; 493 left = p; 494 } 495 /* Try to merge with right neighbour = next element from left. */ 496 if (left->next != chunk_list) { 497 tmp = list_entry(left->next, struct dasd_mchunk, list); 498 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { 499 list_del(&tmp->list); 500 chunk->size += tmp->size + sizeof(struct dasd_mchunk); 501 } 502 } 503 /* Try to merge with left neighbour. */ 504 if (left != chunk_list) { 505 tmp = list_entry(left, struct dasd_mchunk, list); 506 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { 507 tmp->size += chunk->size + sizeof(struct dasd_mchunk); 508 return; 509 } 510 } 511 __list_add(&chunk->list, left, left->next); 512 } 513 514 /* 515 * Check if bsize is in { 512, 1024, 2048, 4096 } 516 */ 517 static inline int 518 dasd_check_blocksize(int bsize) 519 { 520 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) 521 return -EMEDIUMTYPE; 522 return 0; 523 } 524 525 /* externals in dasd.c */ 526 #define DASD_PROFILE_ON 1 527 #define DASD_PROFILE_OFF 0 528 529 extern debug_info_t *dasd_debug_area; 530 extern struct dasd_profile_info_t dasd_global_profile; 531 extern unsigned int dasd_profile_level; 532 extern struct block_device_operations dasd_device_operations; 533 534 extern struct kmem_cache *dasd_page_cache; 535 536 struct dasd_ccw_req * 537 dasd_kmalloc_request(char *, int, int, struct dasd_device *); 538 struct dasd_ccw_req * 539 dasd_smalloc_request(char *, int, int, struct dasd_device *); 540 void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); 541 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); 542 543 static inline int 544 dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) 545 { 546 return set_normalized_cda(ccw, cda); 547 } 548 549 struct dasd_device *dasd_alloc_device(void); 550 void dasd_free_device(struct dasd_device *); 551 552 struct dasd_block *dasd_alloc_block(void); 553 void dasd_free_block(struct dasd_block *); 554 555 void dasd_enable_device(struct dasd_device *); 556 void dasd_set_target_state(struct dasd_device *, int); 557 void dasd_kick_device(struct dasd_device *); 558 559 void dasd_add_request_head(struct dasd_ccw_req *); 560 void dasd_add_request_tail(struct dasd_ccw_req *); 561 int dasd_start_IO(struct dasd_ccw_req *); 562 int dasd_term_IO(struct dasd_ccw_req *); 563 void dasd_schedule_device_bh(struct dasd_device *); 564 void dasd_schedule_block_bh(struct dasd_block *); 565 int dasd_sleep_on(struct dasd_ccw_req *); 566 int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 567 int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 568 void dasd_device_set_timer(struct dasd_device *, int); 569 void dasd_device_clear_timer(struct dasd_device *); 570 void dasd_block_set_timer(struct dasd_block *, int); 571 void dasd_block_clear_timer(struct dasd_block *); 572 int dasd_cancel_req(struct dasd_ccw_req *); 573 int dasd_flush_device_queue(struct dasd_device *); 574 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 575 void dasd_generic_remove (struct ccw_device *cdev); 576 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 577 int dasd_generic_set_offline (struct ccw_device *cdev); 578 int dasd_generic_notify(struct ccw_device *, int); 579 void dasd_generic_handle_state_change(struct dasd_device *); 580 581 int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int); 582 char *dasd_get_sense(struct irb *); 583 584 /* externals in dasd_devmap.c */ 585 extern int dasd_max_devindex; 586 extern int dasd_probeonly; 587 extern int dasd_autodetect; 588 extern int dasd_nopav; 589 extern int dasd_nofcx; 590 591 int dasd_devmap_init(void); 592 void dasd_devmap_exit(void); 593 594 struct dasd_device *dasd_create_device(struct ccw_device *); 595 void dasd_delete_device(struct dasd_device *); 596 597 int dasd_get_uid(struct ccw_device *, struct dasd_uid *); 598 int dasd_set_uid(struct ccw_device *, struct dasd_uid *); 599 int dasd_get_feature(struct ccw_device *, int); 600 int dasd_set_feature(struct ccw_device *, int, int); 601 602 int dasd_add_sysfs_files(struct ccw_device *); 603 void dasd_remove_sysfs_files(struct ccw_device *); 604 605 struct dasd_device *dasd_device_from_cdev(struct ccw_device *); 606 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); 607 struct dasd_device *dasd_device_from_devindex(int); 608 609 int dasd_parse(void); 610 int dasd_busid_known(const char *); 611 612 /* externals in dasd_gendisk.c */ 613 int dasd_gendisk_init(void); 614 void dasd_gendisk_exit(void); 615 int dasd_gendisk_alloc(struct dasd_block *); 616 void dasd_gendisk_free(struct dasd_block *); 617 int dasd_scan_partitions(struct dasd_block *); 618 void dasd_destroy_partitions(struct dasd_block *); 619 620 /* externals in dasd_ioctl.c */ 621 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); 622 623 /* externals in dasd_proc.c */ 624 int dasd_proc_init(void); 625 void dasd_proc_exit(void); 626 627 /* externals in dasd_erp.c */ 628 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); 629 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); 630 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, 631 struct dasd_device *); 632 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 633 void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 634 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); 635 636 /* externals in dasd_3990_erp.c */ 637 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 638 void dasd_3990_erp_handle_sim(struct dasd_device *, char *); 639 640 /* externals in dasd_eer.c */ 641 #ifdef CONFIG_DASD_EER 642 int dasd_eer_init(void); 643 void dasd_eer_exit(void); 644 int dasd_eer_enable(struct dasd_device *); 645 void dasd_eer_disable(struct dasd_device *); 646 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, 647 unsigned int id); 648 void dasd_eer_snss(struct dasd_device *); 649 650 static inline int dasd_eer_enabled(struct dasd_device *device) 651 { 652 return device->eer_cqr != NULL; 653 } 654 #else 655 #define dasd_eer_init() (0) 656 #define dasd_eer_exit() do { } while (0) 657 #define dasd_eer_enable(d) (0) 658 #define dasd_eer_disable(d) do { } while (0) 659 #define dasd_eer_write(d,c,i) do { } while (0) 660 #define dasd_eer_snss(d) do { } while (0) 661 #define dasd_eer_enabled(d) (0) 662 #endif /* CONFIG_DASD_ERR */ 663 664 #endif /* __KERNEL__ */ 665 666 #endif /* DASD_H */ 667