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