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