1
2
3
4
5
6
7
8
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)
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
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
241typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
242
243
244
245
246
247
248#define DASD_CQR_MAX_CCW 255
249
250
251
252
253#define UA_NOT_CONFIGURED 0x00
254#define UA_BASE_DEVICE 0x01
255#define UA_BASE_PAV_ALIAS 0x02
256#define UA_HYPER_PAV_ALIAS 0x03
257
258struct dasd_uid {
259 __u8 type;
260 char vendor[4];
261 char serial[15];
262 __u16 ssid;
263 __u8 real_unit_addr;
264 __u8 base_unit_addr;
265 char vduit[33];
266};
267
268
269
270
271
272
273
274struct dasd_discipline {
275 struct module *owner;
276 char ebcname[8];
277 char name[8];
278 int max_blocks;
279
280 struct list_head list;
281
282
283
284
285
286
287
288
289 int (*check_device) (struct dasd_device *);
290 void (*uncheck_device) (struct dasd_device *);
291
292
293
294
295
296
297
298
299 int (*do_analysis) (struct dasd_block *);
300
301
302
303
304
305
306
307 int (*verify_path)(struct dasd_device *, __u8);
308
309
310
311
312
313 int (*basic_to_ready) (struct dasd_device *);
314 int (*online_to_ready) (struct dasd_device *);
315 int (*basic_to_known)(struct dasd_device *);
316
317
318
319
320
321
322
323
324
325 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
326 struct dasd_block *,
327 struct request *);
328 int (*start_IO) (struct dasd_ccw_req *);
329 int (*term_IO) (struct dasd_ccw_req *);
330 void (*handle_terminated_request) (struct dasd_ccw_req *);
331 int (*format_device) (struct dasd_device *,
332 struct format_data_t *, int enable_pav);
333 int (*free_cp) (struct dasd_ccw_req *, struct request *);
334
335
336
337
338
339
340
341
342
343
344 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
345 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
346 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
347 struct irb *);
348 void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
349 void (*check_for_device_change) (struct dasd_device *,
350 struct dasd_ccw_req *,
351 struct irb *);
352
353
354 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
355 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
356 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
357
358
359 int (*freeze) (struct dasd_device *);
360 int (*restore) (struct dasd_device *);
361
362
363 int (*reload) (struct dasd_device *);
364
365 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
366 void (*kick_validate) (struct dasd_device *);
367 int (*check_attention)(struct dasd_device *, __u8);
368};
369
370extern struct dasd_discipline *dasd_diag_discipline_pointer;
371
372
373
374
375
376
377
378
379#define DASD_EER_DISABLE 0
380#define DASD_EER_TRIGGER 1
381
382
383#define DASD_EER_FATALERROR 1
384#define DASD_EER_NOPATH 2
385#define DASD_EER_STATECHANGE 3
386#define DASD_EER_PPRCSUSPEND 4
387
388struct dasd_path {
389 __u8 opm;
390 __u8 tbvpm;
391 __u8 ppm;
392 __u8 npm;
393
394 __u8 cablepm;
395 __u8 hpfpm;
396 __u8 cuirpm;
397};
398
399struct dasd_profile_info {
400
401 unsigned int dasd_io_reqs;
402 unsigned int dasd_io_sects;
403 unsigned int dasd_io_secs[32];
404 unsigned int dasd_io_times[32];
405 unsigned int dasd_io_timps[32];
406 unsigned int dasd_io_time1[32];
407 unsigned int dasd_io_time2[32];
408 unsigned int dasd_io_time2ps[32];
409 unsigned int dasd_io_time3[32];
410 unsigned int dasd_io_nr_req[32];
411
412
413 struct timespec starttod;
414 unsigned int dasd_io_alias;
415 unsigned int dasd_io_tpm;
416 unsigned int dasd_read_reqs;
417 unsigned int dasd_read_sects;
418 unsigned int dasd_read_alias;
419 unsigned int dasd_read_tpm;
420 unsigned int dasd_read_secs[32];
421 unsigned int dasd_read_times[32];
422 unsigned int dasd_read_time1[32];
423 unsigned int dasd_read_time2[32];
424 unsigned int dasd_read_time3[32];
425 unsigned int dasd_read_nr_req[32];
426};
427
428struct dasd_profile {
429 struct dentry *dentry;
430 struct dasd_profile_info *data;
431 spinlock_t lock;
432};
433
434struct dasd_device {
435
436 struct dasd_block *block;
437
438 unsigned int devindex;
439 unsigned long flags;
440 unsigned short features;
441
442
443 struct dasd_ccw_req *eer_cqr;
444
445
446 struct dasd_discipline *discipline;
447 struct dasd_discipline *base_discipline;
448 void *private;
449 struct dasd_path path_data;
450
451
452 int state, target;
453 struct mutex state_mutex;
454 int stopped;
455
456
457 atomic_t ref_count;
458
459
460 struct list_head ccw_queue;
461 spinlock_t mem_lock;
462 void *ccw_mem;
463 void *erp_mem;
464 struct list_head ccw_chunks;
465 struct list_head erp_chunks;
466
467 atomic_t tasklet_scheduled;
468 struct tasklet_struct tasklet;
469 struct work_struct kick_work;
470 struct work_struct restore_device;
471 struct work_struct reload_device;
472 struct work_struct kick_validate;
473 struct work_struct suc_work;
474 struct timer_list timer;
475
476 debug_info_t *debug_area;
477
478 struct ccw_device *cdev;
479
480
481 struct list_head alias_list;
482
483
484 unsigned long default_expires;
485 unsigned long default_retries;
486
487 unsigned long blk_timeout;
488
489 struct dentry *debugfs_dentry;
490 struct dasd_profile profile;
491};
492
493struct dasd_block {
494
495 struct gendisk *gdp;
496 struct request_queue *request_queue;
497 spinlock_t request_queue_lock;
498 struct block_device *bdev;
499 atomic_t open_count;
500
501 unsigned long long blocks;
502 unsigned int bp_block;
503 unsigned int s2b_shift;
504
505 struct dasd_device *base;
506 struct list_head ccw_queue;
507 spinlock_t queue_lock;
508
509 atomic_t tasklet_scheduled;
510 struct tasklet_struct tasklet;
511 struct timer_list timer;
512
513 struct dentry *debugfs_dentry;
514 struct dasd_profile profile;
515};
516
517struct dasd_attention_data {
518 struct dasd_device *device;
519 __u8 lpum;
520};
521
522
523#define DASD_STOPPED_NOT_ACC 1
524#define DASD_STOPPED_QUIESCE 2
525#define DASD_STOPPED_PENDING 4
526#define DASD_STOPPED_DC_WAIT 8
527#define DASD_STOPPED_SU 16
528#define DASD_STOPPED_PM 32
529#define DASD_UNRESUMED_PM 64
530
531
532#define DASD_FLAG_OFFLINE 3
533#define DASD_FLAG_EER_SNSS 4
534#define DASD_FLAG_EER_IN_USE 5
535#define DASD_FLAG_DEVICE_RO 6
536
537
538
539#define DASD_FLAG_IS_RESERVED 7
540#define DASD_FLAG_LOCK_STOLEN 8
541#define DASD_FLAG_SUSPENDED 9
542#define DASD_FLAG_SAFE_OFFLINE 10
543#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11
544#define DASD_FLAG_ABORTALL 12
545#define DASD_FLAG_PATH_VERIFY 13
546#define DASD_FLAG_SUC 14
547
548#define DASD_SLEEPON_START_TAG ((void *) 1)
549#define DASD_SLEEPON_END_TAG ((void *) 2)
550
551void dasd_put_device_wake(struct dasd_device *);
552
553
554
555
556static inline void
557dasd_get_device(struct dasd_device *device)
558{
559 atomic_inc(&device->ref_count);
560}
561
562static inline void
563dasd_put_device(struct dasd_device *device)
564{
565 if (atomic_dec_return(&device->ref_count) == 0)
566 dasd_put_device_wake(device);
567}
568
569
570
571
572
573struct dasd_mchunk
574{
575 struct list_head list;
576 unsigned long size;
577} __attribute__ ((aligned(8)));
578
579static inline void
580dasd_init_chunklist(struct list_head *chunk_list, void *mem,
581 unsigned long size)
582{
583 struct dasd_mchunk *chunk;
584
585 INIT_LIST_HEAD(chunk_list);
586 chunk = (struct dasd_mchunk *) mem;
587 chunk->size = size - sizeof(struct dasd_mchunk);
588 list_add(&chunk->list, chunk_list);
589}
590
591static inline void *
592dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
593{
594 struct dasd_mchunk *chunk, *tmp;
595
596 size = (size + 7L) & -8L;
597 list_for_each_entry(chunk, chunk_list, list) {
598 if (chunk->size < size)
599 continue;
600 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
601 char *endaddr = (char *) (chunk + 1) + chunk->size;
602 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
603 tmp->size = size;
604 chunk->size -= size + sizeof(struct dasd_mchunk);
605 chunk = tmp;
606 } else
607 list_del(&chunk->list);
608 return (void *) (chunk + 1);
609 }
610 return NULL;
611}
612
613static inline void
614dasd_free_chunk(struct list_head *chunk_list, void *mem)
615{
616 struct dasd_mchunk *chunk, *tmp;
617 struct list_head *p, *left;
618
619 chunk = (struct dasd_mchunk *)
620 ((char *) mem - sizeof(struct dasd_mchunk));
621
622 left = chunk_list;
623 list_for_each(p, chunk_list) {
624 if (list_entry(p, struct dasd_mchunk, list) > chunk)
625 break;
626 left = p;
627 }
628
629 if (left->next != chunk_list) {
630 tmp = list_entry(left->next, struct dasd_mchunk, list);
631 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
632 list_del(&tmp->list);
633 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
634 }
635 }
636
637 if (left != chunk_list) {
638 tmp = list_entry(left, struct dasd_mchunk, list);
639 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
640 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
641 return;
642 }
643 }
644 __list_add(&chunk->list, left, left->next);
645}
646
647
648
649
650static inline int
651dasd_check_blocksize(int bsize)
652{
653 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
654 return -EMEDIUMTYPE;
655 return 0;
656}
657
658
659#define DASD_PROFILE_OFF 0
660#define DASD_PROFILE_ON 1
661#define DASD_PROFILE_GLOBAL_ONLY 2
662
663extern debug_info_t *dasd_debug_area;
664extern struct dasd_profile dasd_global_profile;
665extern unsigned int dasd_global_profile_level;
666extern const struct block_device_operations dasd_device_operations;
667
668extern struct kmem_cache *dasd_page_cache;
669
670struct dasd_ccw_req *
671dasd_kmalloc_request(int , int, int, struct dasd_device *);
672struct dasd_ccw_req *
673dasd_smalloc_request(int , int, int, struct dasd_device *);
674void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *);
675void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
676void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
677
678static inline int
679dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device)
680{
681 return set_normalized_cda(ccw, cda);
682}
683
684struct dasd_device *dasd_alloc_device(void);
685void dasd_free_device(struct dasd_device *);
686
687struct dasd_block *dasd_alloc_block(void);
688void dasd_free_block(struct dasd_block *);
689
690enum blk_eh_timer_return dasd_times_out(struct request *req);
691
692void dasd_enable_device(struct dasd_device *);
693void dasd_set_target_state(struct dasd_device *, int);
694void dasd_kick_device(struct dasd_device *);
695void dasd_restore_device(struct dasd_device *);
696void dasd_reload_device(struct dasd_device *);
697
698void dasd_add_request_head(struct dasd_ccw_req *);
699void dasd_add_request_tail(struct dasd_ccw_req *);
700int dasd_start_IO(struct dasd_ccw_req *);
701int dasd_term_IO(struct dasd_ccw_req *);
702void dasd_schedule_device_bh(struct dasd_device *);
703void dasd_schedule_block_bh(struct dasd_block *);
704int dasd_sleep_on(struct dasd_ccw_req *);
705int dasd_sleep_on_queue(struct list_head *);
706int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
707int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
708void dasd_device_set_timer(struct dasd_device *, int);
709void dasd_device_clear_timer(struct dasd_device *);
710void dasd_block_set_timer(struct dasd_block *, int);
711void dasd_block_clear_timer(struct dasd_block *);
712int dasd_cancel_req(struct dasd_ccw_req *);
713int dasd_flush_device_queue(struct dasd_device *);
714int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
715void dasd_generic_remove (struct ccw_device *cdev);
716int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
717int dasd_generic_set_offline (struct ccw_device *cdev);
718int dasd_generic_notify(struct ccw_device *, int);
719int dasd_generic_last_path_gone(struct dasd_device *);
720int dasd_generic_path_operational(struct dasd_device *);
721void dasd_generic_shutdown(struct ccw_device *);
722
723void dasd_generic_handle_state_change(struct dasd_device *);
724int dasd_generic_pm_freeze(struct ccw_device *);
725int dasd_generic_restore_device(struct ccw_device *);
726enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
727void dasd_generic_path_event(struct ccw_device *, int *);
728int dasd_generic_verify_path(struct dasd_device *, __u8);
729
730int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
731char *dasd_get_sense(struct irb *);
732
733void dasd_device_set_stop_bits(struct dasd_device *, int);
734void dasd_device_remove_stop_bits(struct dasd_device *, int);
735
736int dasd_device_is_ro(struct dasd_device *);
737
738void dasd_profile_reset(struct dasd_profile *);
739int dasd_profile_on(struct dasd_profile *);
740void dasd_profile_off(struct dasd_profile *);
741char *dasd_get_user_string(const char __user *, size_t);
742
743
744extern int dasd_max_devindex;
745extern int dasd_probeonly;
746extern int dasd_autodetect;
747extern int dasd_nopav;
748extern int dasd_nofcx;
749
750int dasd_devmap_init(void);
751void dasd_devmap_exit(void);
752
753struct dasd_device *dasd_create_device(struct ccw_device *);
754void dasd_delete_device(struct dasd_device *);
755
756int dasd_get_feature(struct ccw_device *, int);
757int dasd_set_feature(struct ccw_device *, int, int);
758
759int dasd_add_sysfs_files(struct ccw_device *);
760void dasd_remove_sysfs_files(struct ccw_device *);
761
762struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
763struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
764struct dasd_device *dasd_device_from_devindex(int);
765
766void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
767struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
768
769int dasd_parse(void);
770int dasd_busid_known(const char *);
771
772
773int dasd_gendisk_init(void);
774void dasd_gendisk_exit(void);
775int dasd_gendisk_alloc(struct dasd_block *);
776void dasd_gendisk_free(struct dasd_block *);
777int dasd_scan_partitions(struct dasd_block *);
778void dasd_destroy_partitions(struct dasd_block *);
779
780
781int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
782
783
784int dasd_proc_init(void);
785void dasd_proc_exit(void);
786
787
788struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
789struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
790struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
791 struct dasd_device *);
792void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
793void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
794void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
795
796
797struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
798void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
799
800
801#ifdef CONFIG_DASD_EER
802int dasd_eer_init(void);
803void dasd_eer_exit(void);
804int dasd_eer_enable(struct dasd_device *);
805void dasd_eer_disable(struct dasd_device *);
806void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
807 unsigned int id);
808void dasd_eer_snss(struct dasd_device *);
809
810static inline int dasd_eer_enabled(struct dasd_device *device)
811{
812 return device->eer_cqr != NULL;
813}
814#else
815#define dasd_eer_init() (0)
816#define dasd_eer_exit() do { } while (0)
817#define dasd_eer_enable(d) (0)
818#define dasd_eer_disable(d) do { } while (0)
819#define dasd_eer_write(d,c,i) do { } while (0)
820#define dasd_eer_snss(d) do { } while (0)
821#define dasd_eer_enabled(d) (0)
822#endif
823
824#endif
825