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9#ifndef DASD_INT_H
10#define DASD_INT_H
11
12
13#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
14#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
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37
38
39#define DASD_STATE_NEW 0
40#define DASD_STATE_KNOWN 1
41#define DASD_STATE_BASIC 2
42#define DASD_STATE_UNFMT 3
43#define DASD_STATE_READY 4
44#define DASD_STATE_ONLINE 5
45
46#include <linux/module.h>
47#include <linux/wait.h>
48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/hdreg.h>
51#include <linux/interrupt.h>
52#include <linux/log2.h>
53#include <asm/ccwdev.h>
54#include <linux/workqueue.h>
55#include <asm/debug.h>
56#include <asm/dasd.h>
57#include <asm/idals.h>
58
59
60#define DASD_ECKD_MAGIC 0xC5C3D2C4
61#define DASD_DIAG_MAGIC 0xC4C9C1C7
62#define DASD_FBA_MAGIC 0xC6C2C140
63
64
65
66
67struct dasd_device;
68struct dasd_block;
69
70
71#define DASD_SENSE_BIT_0 0x80
72#define DASD_SENSE_BIT_1 0x40
73#define DASD_SENSE_BIT_2 0x20
74#define DASD_SENSE_BIT_3 0x10
75
76
77#define DASD_SIM_SENSE 0x0F
78#define DASD_SIM_MSG_TO_OP 0x03
79#define DASD_SIM_LOG 0x0C
80
81
82#define CDEV_NESTED_FIRST 1
83#define CDEV_NESTED_SECOND 2
84
85
86
87
88#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
89do { \
90 debug_sprintf_event(d_device->debug_area, \
91 d_level, \
92 d_str "\n", \
93 d_data); \
94} while(0)
95
96#define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \
97do { \
98 debug_sprintf_exception(d_device->debug_area, \
99 d_level, \
100 d_str "\n", \
101 d_data); \
102} while(0)
103
104#define DBF_EVENT(d_level, d_str, d_data...)\
105do { \
106 debug_sprintf_event(dasd_debug_area, \
107 d_level,\
108 d_str "\n", \
109 d_data); \
110} while(0)
111
112#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
113do { \
114 struct ccw_dev_id __dev_id; \
115 ccw_device_get_id(d_cdev, &__dev_id); \
116 debug_sprintf_event(dasd_debug_area, \
117 d_level, \
118 "0.%x.%04x " d_str "\n", \
119 __dev_id.ssid, __dev_id.devno, d_data); \
120} while (0)
121
122#define DBF_EXC(d_level, d_str, d_data...)\
123do { \
124 debug_sprintf_exception(dasd_debug_area, \
125 d_level,\
126 d_str "\n", \
127 d_data); \
128} while(0)
129
130
131#define ERRORLENGTH 30
132
133
134#define DBF_EMERG 0
135#define DBF_ALERT 1
136#define DBF_CRIT 2
137#define DBF_ERR 3
138#define DBF_WARNING 4
139#define DBF_NOTICE 5
140#define DBF_INFO 6
141#define DBF_DEBUG 6
142
143
144#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
145do { \
146 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
147 dev_name(&d_device->cdev->dev), d_args); \
148 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
149} while(0)
150
151#define MESSAGE(d_loglevel,d_string,d_args...)\
152do { \
153 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
154 DBF_EVENT(DBF_ALERT, d_string, d_args); \
155} while(0)
156
157
158#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
159do { \
160 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
161 dev_name(&d_device->cdev->dev), d_args); \
162} while(0)
163
164#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
165do { \
166 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
167} while(0)
168
169struct dasd_ccw_req {
170 unsigned int magic;
171 struct list_head devlist;
172 struct list_head blocklist;
173
174
175 struct dasd_block *block;
176 struct dasd_device *memdev;
177 struct dasd_device *startdev;
178 struct dasd_device *basedev;
179 void *cpaddr;
180 unsigned char cpmode;
181 char status;
182 short retries;
183 unsigned long flags;
184
185
186 unsigned long starttime;
187 unsigned long expires;
188 char lpm;
189 void *data;
190
191
192 int intrc;
193 struct irb irb;
194 struct dasd_ccw_req *refers;
195 void *function;
196
197
198 unsigned long long buildclk;
199 unsigned long long startclk;
200 unsigned long long stopclk;
201 unsigned long long endclk;
202
203
204 void (*callback)(struct dasd_ccw_req *, void *data);
205 void *callback_data;
206};
207
208
209
210
211#define DASD_CQR_FILLED 0x00
212#define DASD_CQR_DONE 0x01
213#define DASD_CQR_NEED_ERP 0x02
214#define DASD_CQR_IN_ERP 0x03
215#define DASD_CQR_FAILED 0x04
216#define DASD_CQR_TERMINATED 0x05
217
218#define DASD_CQR_QUEUED 0x80
219#define DASD_CQR_IN_IO 0x81
220#define DASD_CQR_ERROR 0x82
221#define DASD_CQR_CLEAR_PENDING 0x83
222#define DASD_CQR_CLEARED 0x84
223#define DASD_CQR_SUCCESS 0x85
224
225
226#define DASD_EXPIRES 300
227#define DASD_EXPIRES_MAX 40000000
228#define DASD_RETRIES 256
229#define DASD_RETRIES_MAX 32768
230
231
232#define DASD_CQR_FLAGS_USE_ERP 0
233#define DASD_CQR_FLAGS_FAILFAST 1
234#define DASD_CQR_VERIFY_PATH 2
235#define DASD_CQR_ALLOW_SLOCK 3
236
237
238
239
240
241
242
243#define DASD_CQR_SUPPRESS_NRF 4
244#define DASD_CQR_SUPPRESS_FP 5
245#define DASD_CQR_SUPPRESS_IL 6
246
247
248typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
249
250
251
252
253
254
255#define DASD_CQR_MAX_CCW 255
256
257
258
259
260#define UA_NOT_CONFIGURED 0x00
261#define UA_BASE_DEVICE 0x01
262#define UA_BASE_PAV_ALIAS 0x02
263#define UA_HYPER_PAV_ALIAS 0x03
264
265struct dasd_uid {
266 __u8 type;
267 char vendor[4];
268 char serial[15];
269 __u16 ssid;
270 __u8 real_unit_addr;
271 __u8 base_unit_addr;
272 char vduit[33];
273};
274
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277
278
279
280
281struct dasd_discipline {
282 struct module *owner;
283 char ebcname[8];
284 char name[8];
285 int max_blocks;
286
287 struct list_head list;
288
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293
294
295
296 int (*check_device) (struct dasd_device *);
297 void (*uncheck_device) (struct dasd_device *);
298
299
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302
303
304
305
306 int (*do_analysis) (struct dasd_block *);
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308
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311
312
313
314 int (*verify_path)(struct dasd_device *, __u8);
315
316
317
318
319
320 int (*basic_to_ready) (struct dasd_device *);
321 int (*online_to_ready) (struct dasd_device *);
322 int (*basic_to_known)(struct dasd_device *);
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330
331
332
333 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
334 struct dasd_block *,
335 struct request *);
336 int (*start_IO) (struct dasd_ccw_req *);
337 int (*term_IO) (struct dasd_ccw_req *);
338 void (*handle_terminated_request) (struct dasd_ccw_req *);
339 int (*format_device) (struct dasd_device *,
340 struct format_data_t *, int);
341 int (*check_device_format)(struct dasd_device *,
342 struct format_check_t *, int);
343 int (*free_cp) (struct dasd_ccw_req *, struct request *);
344
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351
352
353
354 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
355 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
356 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
357 struct irb *);
358 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
359 void (*check_for_device_change) (struct dasd_device *,
360 struct dasd_ccw_req *,
361 struct irb *);
362
363
364 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
365 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
366 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
367
368
369 int (*freeze) (struct dasd_device *);
370 int (*restore) (struct dasd_device *);
371
372
373 int (*reload) (struct dasd_device *);
374
375 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
376 void (*kick_validate) (struct dasd_device *);
377 int (*check_attention)(struct dasd_device *, __u8);
378 int (*host_access_count)(struct dasd_device *);
379 int (*hosts_print)(struct dasd_device *, struct seq_file *);
380};
381
382extern struct dasd_discipline *dasd_diag_discipline_pointer;
383
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388
389
390
391#define DASD_EER_DISABLE 0
392#define DASD_EER_TRIGGER 1
393
394
395#define DASD_EER_FATALERROR 1
396#define DASD_EER_NOPATH 2
397#define DASD_EER_STATECHANGE 3
398#define DASD_EER_PPRCSUSPEND 4
399
400struct dasd_path {
401 __u8 opm;
402 __u8 tbvpm;
403 __u8 ppm;
404 __u8 npm;
405
406 __u8 cablepm;
407 __u8 hpfpm;
408 __u8 cuirpm;
409};
410
411struct dasd_profile_info {
412
413 unsigned int dasd_io_reqs;
414 unsigned int dasd_io_sects;
415 unsigned int dasd_io_secs[32];
416 unsigned int dasd_io_times[32];
417 unsigned int dasd_io_timps[32];
418 unsigned int dasd_io_time1[32];
419 unsigned int dasd_io_time2[32];
420 unsigned int dasd_io_time2ps[32];
421 unsigned int dasd_io_time3[32];
422 unsigned int dasd_io_nr_req[32];
423
424
425 struct timespec starttod;
426 unsigned int dasd_io_alias;
427 unsigned int dasd_io_tpm;
428 unsigned int dasd_read_reqs;
429 unsigned int dasd_read_sects;
430 unsigned int dasd_read_alias;
431 unsigned int dasd_read_tpm;
432 unsigned int dasd_read_secs[32];
433 unsigned int dasd_read_times[32];
434 unsigned int dasd_read_time1[32];
435 unsigned int dasd_read_time2[32];
436 unsigned int dasd_read_time3[32];
437 unsigned int dasd_read_nr_req[32];
438};
439
440struct dasd_profile {
441 struct dentry *dentry;
442 struct dasd_profile_info *data;
443 spinlock_t lock;
444};
445
446struct dasd_device {
447
448 struct dasd_block *block;
449
450 unsigned int devindex;
451 unsigned long flags;
452 unsigned short features;
453
454
455 struct dasd_ccw_req *eer_cqr;
456
457
458 struct dasd_discipline *discipline;
459 struct dasd_discipline *base_discipline;
460 void *private;
461 struct dasd_path path_data;
462
463
464 int state, target;
465 struct mutex state_mutex;
466 int stopped;
467
468
469 atomic_t ref_count;
470
471
472 struct list_head ccw_queue;
473 spinlock_t mem_lock;
474 void *ccw_mem;
475 void *erp_mem;
476 struct list_head ccw_chunks;
477 struct list_head erp_chunks;
478
479 atomic_t tasklet_scheduled;
480 struct tasklet_struct tasklet;
481 struct work_struct kick_work;
482 struct work_struct restore_device;
483 struct work_struct reload_device;
484 struct work_struct kick_validate;
485 struct work_struct suc_work;
486 struct timer_list timer;
487
488 debug_info_t *debug_area;
489
490 struct ccw_device *cdev;
491
492
493 struct list_head alias_list;
494
495
496 unsigned long default_expires;
497 unsigned long default_retries;
498
499 unsigned long blk_timeout;
500
501 struct dentry *debugfs_dentry;
502 struct dentry *hosts_dentry;
503 struct dasd_profile profile;
504};
505
506struct dasd_block {
507
508 struct gendisk *gdp;
509 struct request_queue *request_queue;
510 spinlock_t request_queue_lock;
511 struct block_device *bdev;
512 atomic_t open_count;
513
514 unsigned long long blocks;
515 unsigned int bp_block;
516 unsigned int s2b_shift;
517
518 struct dasd_device *base;
519 struct list_head ccw_queue;
520 spinlock_t queue_lock;
521
522 atomic_t tasklet_scheduled;
523 struct tasklet_struct tasklet;
524 struct timer_list timer;
525
526 struct dentry *debugfs_dentry;
527 struct dasd_profile profile;
528};
529
530struct dasd_attention_data {
531 struct dasd_device *device;
532 __u8 lpum;
533};
534
535
536#define DASD_STOPPED_NOT_ACC 1
537#define DASD_STOPPED_QUIESCE 2
538#define DASD_STOPPED_PENDING 4
539#define DASD_STOPPED_DC_WAIT 8
540#define DASD_STOPPED_SU 16
541#define DASD_STOPPED_PM 32
542#define DASD_UNRESUMED_PM 64
543
544
545#define DASD_FLAG_OFFLINE 3
546#define DASD_FLAG_EER_SNSS 4
547#define DASD_FLAG_EER_IN_USE 5
548#define DASD_FLAG_DEVICE_RO 6
549
550
551
552#define DASD_FLAG_IS_RESERVED 7
553#define DASD_FLAG_LOCK_STOLEN 8
554#define DASD_FLAG_SUSPENDED 9
555#define DASD_FLAG_SAFE_OFFLINE 10
556#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11
557#define DASD_FLAG_ABORTALL 12
558#define DASD_FLAG_PATH_VERIFY 13
559#define DASD_FLAG_SUC 14
560
561#define DASD_SLEEPON_START_TAG ((void *) 1)
562#define DASD_SLEEPON_END_TAG ((void *) 2)
563
564void dasd_put_device_wake(struct dasd_device *);
565
566
567
568
569static inline void
570dasd_get_device(struct dasd_device *device)
571{
572 atomic_inc(&device->ref_count);
573}
574
575static inline void
576dasd_put_device(struct dasd_device *device)
577{
578 if (atomic_dec_return(&device->ref_count) == 0)
579 dasd_put_device_wake(device);
580}
581
582
583
584
585
586struct dasd_mchunk
587{
588 struct list_head list;
589 unsigned long size;
590} __attribute__ ((aligned(8)));
591
592static inline void
593dasd_init_chunklist(struct list_head *chunk_list, void *mem,
594 unsigned long size)
595{
596 struct dasd_mchunk *chunk;
597
598 INIT_LIST_HEAD(chunk_list);
599 chunk = (struct dasd_mchunk *) mem;
600 chunk->size = size - sizeof(struct dasd_mchunk);
601 list_add(&chunk->list, chunk_list);
602}
603
604static inline void *
605dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
606{
607 struct dasd_mchunk *chunk, *tmp;
608
609 size = (size + 7L) & -8L;
610 list_for_each_entry(chunk, chunk_list, list) {
611 if (chunk->size < size)
612 continue;
613 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
614 char *endaddr = (char *) (chunk + 1) + chunk->size;
615 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
616 tmp->size = size;
617 chunk->size -= size + sizeof(struct dasd_mchunk);
618 chunk = tmp;
619 } else
620 list_del(&chunk->list);
621 return (void *) (chunk + 1);
622 }
623 return NULL;
624}
625
626static inline void
627dasd_free_chunk(struct list_head *chunk_list, void *mem)
628{
629 struct dasd_mchunk *chunk, *tmp;
630 struct list_head *p, *left;
631
632 chunk = (struct dasd_mchunk *)
633 ((char *) mem - sizeof(struct dasd_mchunk));
634
635 left = chunk_list;
636 list_for_each(p, chunk_list) {
637 if (list_entry(p, struct dasd_mchunk, list) > chunk)
638 break;
639 left = p;
640 }
641
642 if (left->next != chunk_list) {
643 tmp = list_entry(left->next, struct dasd_mchunk, list);
644 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
645 list_del(&tmp->list);
646 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
647 }
648 }
649
650 if (left != chunk_list) {
651 tmp = list_entry(left, struct dasd_mchunk, list);
652 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
653 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
654 return;
655 }
656 }
657 __list_add(&chunk->list, left, left->next);
658}
659
660
661
662
663static inline int
664dasd_check_blocksize(int bsize)
665{
666 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
667 return -EMEDIUMTYPE;
668 return 0;
669}
670
671
672#define DASD_PROFILE_OFF 0
673#define DASD_PROFILE_ON 1
674#define DASD_PROFILE_GLOBAL_ONLY 2
675
676extern debug_info_t *dasd_debug_area;
677extern struct dasd_profile dasd_global_profile;
678extern unsigned int dasd_global_profile_level;
679extern const struct block_device_operations dasd_device_operations;
680
681extern struct kmem_cache *dasd_page_cache;
682
683struct dasd_ccw_req *
684dasd_kmalloc_request(int , int, int, struct dasd_device *);
685struct dasd_ccw_req *
686dasd_smalloc_request(int , int, int, struct dasd_device *);
687void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *);
688void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
689void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
690
691static inline int
692dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device)
693{
694 return set_normalized_cda(ccw, cda);
695}
696
697struct dasd_device *dasd_alloc_device(void);
698void dasd_free_device(struct dasd_device *);
699
700struct dasd_block *dasd_alloc_block(void);
701void dasd_free_block(struct dasd_block *);
702
703enum blk_eh_timer_return dasd_times_out(struct request *req);
704
705void dasd_enable_device(struct dasd_device *);
706void dasd_set_target_state(struct dasd_device *, int);
707void dasd_kick_device(struct dasd_device *);
708void dasd_restore_device(struct dasd_device *);
709void dasd_reload_device(struct dasd_device *);
710
711void dasd_add_request_head(struct dasd_ccw_req *);
712void dasd_add_request_tail(struct dasd_ccw_req *);
713int dasd_start_IO(struct dasd_ccw_req *);
714int dasd_term_IO(struct dasd_ccw_req *);
715void dasd_schedule_device_bh(struct dasd_device *);
716void dasd_schedule_block_bh(struct dasd_block *);
717int dasd_sleep_on(struct dasd_ccw_req *);
718int dasd_sleep_on_queue(struct list_head *);
719int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
720int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
721void dasd_device_set_timer(struct dasd_device *, int);
722void dasd_device_clear_timer(struct dasd_device *);
723void dasd_block_set_timer(struct dasd_block *, int);
724void dasd_block_clear_timer(struct dasd_block *);
725int dasd_cancel_req(struct dasd_ccw_req *);
726int dasd_flush_device_queue(struct dasd_device *);
727int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
728void dasd_generic_free_discipline(struct dasd_device *);
729void dasd_generic_remove (struct ccw_device *cdev);
730int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
731int dasd_generic_set_offline (struct ccw_device *cdev);
732int dasd_generic_notify(struct ccw_device *, int);
733int dasd_generic_last_path_gone(struct dasd_device *);
734int dasd_generic_path_operational(struct dasd_device *);
735void dasd_generic_shutdown(struct ccw_device *);
736
737void dasd_generic_handle_state_change(struct dasd_device *);
738int dasd_generic_pm_freeze(struct ccw_device *);
739int dasd_generic_restore_device(struct ccw_device *);
740enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
741void dasd_generic_path_event(struct ccw_device *, int *);
742int dasd_generic_verify_path(struct dasd_device *, __u8);
743
744int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
745char *dasd_get_sense(struct irb *);
746
747void dasd_device_set_stop_bits(struct dasd_device *, int);
748void dasd_device_remove_stop_bits(struct dasd_device *, int);
749
750int dasd_device_is_ro(struct dasd_device *);
751
752void dasd_profile_reset(struct dasd_profile *);
753int dasd_profile_on(struct dasd_profile *);
754void dasd_profile_off(struct dasd_profile *);
755char *dasd_get_user_string(const char __user *, size_t);
756
757
758extern int dasd_max_devindex;
759extern int dasd_probeonly;
760extern int dasd_autodetect;
761extern int dasd_nopav;
762extern int dasd_nofcx;
763
764int dasd_devmap_init(void);
765void dasd_devmap_exit(void);
766
767struct dasd_device *dasd_create_device(struct ccw_device *);
768void dasd_delete_device(struct dasd_device *);
769
770int dasd_get_feature(struct ccw_device *, int);
771int dasd_set_feature(struct ccw_device *, int, int);
772
773int dasd_add_sysfs_files(struct ccw_device *);
774void dasd_remove_sysfs_files(struct ccw_device *);
775
776struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
777struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
778struct dasd_device *dasd_device_from_devindex(int);
779
780void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
781struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
782
783int dasd_parse(void);
784int dasd_busid_known(const char *);
785
786
787int dasd_gendisk_init(void);
788void dasd_gendisk_exit(void);
789int dasd_gendisk_alloc(struct dasd_block *);
790void dasd_gendisk_free(struct dasd_block *);
791int dasd_scan_partitions(struct dasd_block *);
792void dasd_destroy_partitions(struct dasd_block *);
793
794
795int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
796
797
798int dasd_proc_init(void);
799void dasd_proc_exit(void);
800
801
802struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
803struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
804struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
805 struct dasd_device *);
806void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
807void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
808void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
809
810
811struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
812void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
813
814
815#ifdef CONFIG_DASD_EER
816int dasd_eer_init(void);
817void dasd_eer_exit(void);
818int dasd_eer_enable(struct dasd_device *);
819void dasd_eer_disable(struct dasd_device *);
820void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
821 unsigned int id);
822void dasd_eer_snss(struct dasd_device *);
823
824static inline int dasd_eer_enabled(struct dasd_device *device)
825{
826 return device->eer_cqr != NULL;
827}
828#else
829#define dasd_eer_init() (0)
830#define dasd_eer_exit() do { } while (0)
831#define dasd_eer_enable(d) (0)
832#define dasd_eer_disable(d) do { } while (0)
833#define dasd_eer_write(d,c,i) do { } while (0)
834#define dasd_eer_snss(d) do { } while (0)
835#define dasd_eer_enabled(d) (0)
836#endif
837
838#endif
839