aboutsummaryrefslogtreecommitdiff
path: root/drivers/nvdimm/nd.h
blob: ec5219680092d7abcf4ed4bc6911f361a43419ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
 */
#ifndef __ND_H__
#define __ND_H__
#include <linux/libnvdimm.h>
#include <linux/badblocks.h>
#include <linux/blkdev.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/ndctl.h>
#include <linux/types.h>
#include <linux/nd.h>
#include "label.h"

enum {
	/*
	 * Limits the maximum number of block apertures a dimm can
	 * support and is an input to the geometry/on-disk-format of a
	 * BTT instance
	 */
	ND_MAX_LANES = 256,
	INT_LBASIZE_ALIGNMENT = 64,
	NVDIMM_IO_ATOMIC = 1,
};

struct nvdimm_drvdata {
	struct device *dev;
	int nslabel_size;
	struct nd_cmd_get_config_size nsarea;
	void *data;
	bool cxl;
	int ns_current, ns_next;
	struct resource dpa;
	struct kref kref;
};

static inline const u8 *nsl_ref_name(struct nvdimm_drvdata *ndd,
				     struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return nd_label->cxl.name;
	return nd_label->efi.name;
}

static inline u8 *nsl_get_name(struct nvdimm_drvdata *ndd,
			       struct nd_namespace_label *nd_label, u8 *name)
{
	if (ndd->cxl)
		return memcpy(name, nd_label->cxl.name, NSLABEL_NAME_LEN);
	return memcpy(name, nd_label->efi.name, NSLABEL_NAME_LEN);
}

static inline u8 *nsl_set_name(struct nvdimm_drvdata *ndd,
			       struct nd_namespace_label *nd_label, u8 *name)
{
	if (!name)
		return NULL;
	if (ndd->cxl)
		return memcpy(nd_label->cxl.name, name, NSLABEL_NAME_LEN);
	return memcpy(nd_label->efi.name, name, NSLABEL_NAME_LEN);
}

static inline u32 nsl_get_slot(struct nvdimm_drvdata *ndd,
			       struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le32_to_cpu(nd_label->cxl.slot);
	return __le32_to_cpu(nd_label->efi.slot);
}

static inline void nsl_set_slot(struct nvdimm_drvdata *ndd,
				struct nd_namespace_label *nd_label, u32 slot)
{
	if (ndd->cxl)
		nd_label->cxl.slot = __cpu_to_le32(slot);
	else
		nd_label->efi.slot = __cpu_to_le32(slot);
}

static inline u64 nsl_get_checksum(struct nvdimm_drvdata *ndd,
				   struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le64_to_cpu(nd_label->cxl.checksum);
	return __le64_to_cpu(nd_label->efi.checksum);
}

static inline void nsl_set_checksum(struct nvdimm_drvdata *ndd,
				    struct nd_namespace_label *nd_label,
				    u64 checksum)
{
	if (ndd->cxl)
		nd_label->cxl.checksum = __cpu_to_le64(checksum);
	else
		nd_label->efi.checksum = __cpu_to_le64(checksum);
}

static inline u32 nsl_get_flags(struct nvdimm_drvdata *ndd,
				struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le32_to_cpu(nd_label->cxl.flags);
	return __le32_to_cpu(nd_label->efi.flags);
}

static inline void nsl_set_flags(struct nvdimm_drvdata *ndd,
				 struct nd_namespace_label *nd_label, u32 flags)
{
	if (ndd->cxl)
		nd_label->cxl.flags = __cpu_to_le32(flags);
	else
		nd_label->efi.flags = __cpu_to_le32(flags);
}

static inline u64 nsl_get_dpa(struct nvdimm_drvdata *ndd,
			      struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le64_to_cpu(nd_label->cxl.dpa);
	return __le64_to_cpu(nd_label->efi.dpa);
}

static inline void nsl_set_dpa(struct nvdimm_drvdata *ndd,
			       struct nd_namespace_label *nd_label, u64 dpa)
{
	if (ndd->cxl)
		nd_label->cxl.dpa = __cpu_to_le64(dpa);
	else
		nd_label->efi.dpa = __cpu_to_le64(dpa);
}

static inline u64 nsl_get_rawsize(struct nvdimm_drvdata *ndd,
				  struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le64_to_cpu(nd_label->cxl.rawsize);
	return __le64_to_cpu(nd_label->efi.rawsize);
}

static inline void nsl_set_rawsize(struct nvdimm_drvdata *ndd,
				   struct nd_namespace_label *nd_label,
				   u64 rawsize)
{
	if (ndd->cxl)
		nd_label->cxl.rawsize = __cpu_to_le64(rawsize);
	else
		nd_label->efi.rawsize = __cpu_to_le64(rawsize);
}

static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd,
				     struct nd_namespace_label *nd_label)
{
	/* WARN future refactor attempts that break this assumption */
	if (dev_WARN_ONCE(ndd->dev, ndd->cxl,
			  "CXL labels do not use the isetcookie concept\n"))
		return 0;
	return __le64_to_cpu(nd_label->efi.isetcookie);
}

static inline void nsl_set_isetcookie(struct nvdimm_drvdata *ndd,
				      struct nd_namespace_label *nd_label,
				      u64 isetcookie)
{
	if (!ndd->cxl)
		nd_label->efi.isetcookie = __cpu_to_le64(isetcookie);
}

static inline bool nsl_validate_isetcookie(struct nvdimm_drvdata *ndd,
					   struct nd_namespace_label *nd_label,
					   u64 cookie)
{
	/*
	 * Let the EFI and CXL validation comingle, where fields that
	 * don't matter to CXL always validate.
	 */
	if (ndd->cxl)
		return true;
	return cookie == __le64_to_cpu(nd_label->efi.isetcookie);
}

static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd,
				   struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le16_to_cpu(nd_label->cxl.position);
	return __le16_to_cpu(nd_label->efi.position);
}

static inline void nsl_set_position(struct nvdimm_drvdata *ndd,
				    struct nd_namespace_label *nd_label,
				    u16 position)
{
	if (ndd->cxl)
		nd_label->cxl.position = __cpu_to_le16(position);
	else
		nd_label->efi.position = __cpu_to_le16(position);
}

static inline u16 nsl_get_nlabel(struct nvdimm_drvdata *ndd,
				 struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return 0;
	return __le16_to_cpu(nd_label->efi.nlabel);
}

static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd,
				  struct nd_namespace_label *nd_label,
				  u16 nlabel)
{
	if (!ndd->cxl)
		nd_label->efi.nlabel = __cpu_to_le16(nlabel);
}

static inline u16 nsl_get_nrange(struct nvdimm_drvdata *ndd,
				 struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return __le16_to_cpu(nd_label->cxl.nrange);
	return 1;
}

static inline void nsl_set_nrange(struct nvdimm_drvdata *ndd,
				  struct nd_namespace_label *nd_label,
				  u16 nrange)
{
	if (ndd->cxl)
		nd_label->cxl.nrange = __cpu_to_le16(nrange);
}

static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd,
				  struct nd_namespace_label *nd_label)
{
	/*
	 * Yes, for some reason the EFI labels convey a massive 64-bit
	 * lbasize, that got fixed for CXL.
	 */
	if (ndd->cxl)
		return __le16_to_cpu(nd_label->cxl.lbasize);
	return __le64_to_cpu(nd_label->efi.lbasize);
}

static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
				   struct nd_namespace_label *nd_label,
				   u64 lbasize)
{
	if (ndd->cxl)
		nd_label->cxl.lbasize = __cpu_to_le16(lbasize);
	else
		nd_label->efi.lbasize = __cpu_to_le64(lbasize);
}

static inline const uuid_t *nsl_get_uuid(struct nvdimm_drvdata *ndd,
					 struct nd_namespace_label *nd_label,
					 uuid_t *uuid)
{
	if (ndd->cxl)
		import_uuid(uuid, nd_label->cxl.uuid);
	else
		import_uuid(uuid, nd_label->efi.uuid);
	return uuid;
}

static inline const uuid_t *nsl_set_uuid(struct nvdimm_drvdata *ndd,
					 struct nd_namespace_label *nd_label,
					 const uuid_t *uuid)
{
	if (ndd->cxl)
		export_uuid(nd_label->cxl.uuid, uuid);
	else
		export_uuid(nd_label->efi.uuid, uuid);
	return uuid;
}

static inline bool nsl_uuid_equal(struct nvdimm_drvdata *ndd,
				  struct nd_namespace_label *nd_label,
				  const uuid_t *uuid)
{
	uuid_t tmp;

	if (ndd->cxl)
		import_uuid(&tmp, nd_label->cxl.uuid);
	else
		import_uuid(&tmp, nd_label->efi.uuid);
	return uuid_equal(&tmp, uuid);
}

static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd,
				     struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return nd_label->cxl.uuid;
	return nd_label->efi.uuid;
}

bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
			    struct nd_namespace_label *nd_label, guid_t *guid);
enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd,
					    struct nd_namespace_label *nd_label);

struct nd_region_data {
	int ns_count;
	int ns_active;
	unsigned int hints_shift;
	void __iomem *flush_wpq[];
};

static inline void __iomem *ndrd_get_flush_wpq(struct nd_region_data *ndrd,
		int dimm, int hint)
{
	unsigned int num = 1 << ndrd->hints_shift;
	unsigned int mask = num - 1;

	return ndrd->flush_wpq[dimm * num + (hint & mask)];
}

static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm,
		int hint, void __iomem *flush)
{
	unsigned int num = 1 << ndrd->hints_shift;
	unsigned int mask = num - 1;

	ndrd->flush_wpq[dimm * num + (hint & mask)] = flush;
}

static inline struct nd_namespace_index *to_namespace_index(
		struct nvdimm_drvdata *ndd, int i)
{
	if (i < 0)
		return NULL;

	return ndd->data + sizeof_namespace_index(ndd) * i;
}

static inline struct nd_namespace_index *to_current_namespace_index(
		struct nvdimm_drvdata *ndd)
{
	return to_namespace_index(ndd, ndd->ns_current);
}

static inline struct nd_namespace_index *to_next_namespace_index(
		struct nvdimm_drvdata *ndd)
{
	return to_namespace_index(ndd, ndd->ns_next);
}

unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd);

#define efi_namespace_label_has(ndd, field) \
	(!ndd->cxl && offsetof(struct nvdimm_efi_label, field) \
		< sizeof_namespace_label(ndd))

#define nd_dbg_dpa(r, d, res, fmt, arg...) \
	dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
		(r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
		(unsigned long long) (res ? resource_size(res) : 0), \
		(unsigned long long) (res ? res->start : 0), ##arg)

#define for_each_dpa_resource(ndd, res) \
	for (res = (ndd)->dpa.child; res; res = res->sibling)

#define for_each_dpa_resource_safe(ndd, res, next) \
	for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
			res; res = next, next = next ? next->sibling : NULL)

struct nd_percpu_lane {
	int count;
	spinlock_t lock;
};

enum nd_label_flags {
	ND_LABEL_REAP,
};
struct nd_label_ent {
	struct list_head list;
	unsigned long flags;
	struct nd_namespace_label *label;
};

enum nd_mapping_lock_class {
	ND_MAPPING_CLASS0,
	ND_MAPPING_UUID_SCAN,
};

struct nd_mapping {
	struct nvdimm *nvdimm;
	u64 start;
	u64 size;
	int position;
	struct list_head labels;
	struct mutex lock;
	/*
	 * @ndd is for private use at region enable / disable time for
	 * get_ndd() + put_ndd(), all other nd_mapping to ndd
	 * conversions use to_ndd() which respects enabled state of the
	 * nvdimm.
	 */
	struct nvdimm_drvdata *ndd;
};

struct nd_region {
	struct device dev;
	struct ida ns_ida;
	struct ida btt_ida;
	struct ida pfn_ida;
	struct ida dax_ida;
	unsigned long flags;
	struct device *ns_seed;
	struct device *btt_seed;
	struct device *pfn_seed;
	struct device *dax_seed;
	unsigned long align;
	u16 ndr_mappings;
	u64 ndr_size;
	u64 ndr_start;
	int id, num_lanes, ro, numa_node, target_node;
	void *provider_data;
	struct kernfs_node *bb_state;
	struct badblocks bb;
	struct nd_interleave_set *nd_set;
	struct nd_percpu_lane __percpu *lane;
	int (*flush)(struct nd_region *nd_region, struct bio *bio);
	struct nd_mapping mapping[];
};

static inline bool nsl_validate_nlabel(struct nd_region *nd_region,
				       struct nvdimm_drvdata *ndd,
				       struct nd_namespace_label *nd_label)
{
	if (ndd->cxl)
		return true;
	return nsl_get_nlabel(ndd, nd_label) == nd_region->ndr_mappings;
}

/*
 * Lookup next in the repeating sequence of 01, 10, and 11.
 */
static inline unsigned nd_inc_seq(unsigned seq)
{
	static const unsigned next[] = { 0, 2, 3, 1 };

	return next[seq & 3];
}

struct btt;
struct nd_btt {
	struct device dev;
	struct nd_namespace_common *ndns;
	struct btt *btt;
	unsigned long lbasize;
	u64 size;
	uuid_t *uuid;
	int id;
	int initial_offset;
	u16 version_major;
	u16 version_minor;
};

enum nd_pfn_mode {
	PFN_MODE_NONE,
	PFN_MODE_RAM,
	PFN_MODE_PMEM,
};

struct nd_pfn {
	int id;
	uuid_t *uuid;
	struct device dev;
	unsigned long align;
	unsigned long npfns;
	enum nd_pfn_mode mode;
	struct nd_pfn_sb *pfn_sb;
	struct nd_namespace_common *ndns;
};

struct nd_dax {
	struct nd_pfn nd_pfn;
};

static inline u32 nd_info_block_reserve(void)
{
	return ALIGN(SZ_8K, PAGE_SIZE);
}

enum nd_async_mode {
	ND_SYNC,
	ND_ASYNC,
};

int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
void wait_nvdimm_bus_probe_idle(struct device *dev);
void nd_device_register(struct device *dev);
void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
void nd_device_notify(struct device *dev, enum nvdimm_event event);
int nd_uuid_store(struct device *dev, uuid_t **uuid_out, const char *buf,
		size_t len);
ssize_t nd_size_select_show(unsigned long current_size,
		const unsigned long *supported, char *buf);
ssize_t nd_size_select_store(struct device *dev, const char *buf,
		unsigned long *current_size, const unsigned long *supported);
int __init nvdimm_init(void);
int __init nd_region_init(void);
int __init nd_label_init(void);
void nvdimm_exit(void);
void nd_region_exit(void);
struct nvdimm;
extern const struct attribute_group nd_device_attribute_group;
extern const struct attribute_group nd_numa_attribute_group;
extern const struct attribute_group *nvdimm_bus_attribute_groups[];
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
int nvdimm_check_config_data(struct device *dev);
int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
int nvdimm_get_config_data(struct nvdimm_drvdata *ndd, void *buf,
			   size_t offset, size_t len);
int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
		void *buf, size_t len);
long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
		unsigned int len);
void nvdimm_set_labeling(struct device *dev);
void nvdimm_set_locked(struct device *dev);
void nvdimm_clear_locked(struct device *dev);
int nvdimm_security_setup_events(struct device *dev);
#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
int nvdimm_security_unlock(struct device *dev);
#else
static inline int nvdimm_security_unlock(struct device *dev)
{
	return 0;
}
#endif
struct nd_btt *to_nd_btt(struct device *dev);

struct nd_gen_sb {
	char reserved[SZ_4K - 8];
	__le64 checksum;
};

u64 nd_sb_checksum(struct nd_gen_sb *sb);
#if IS_ENABLED(CONFIG_BTT)
int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns);
bool is_nd_btt(struct device *dev);
struct device *nd_btt_create(struct nd_region *nd_region);
#else
static inline int nd_btt_probe(struct device *dev,
		struct nd_namespace_common *ndns)
{
	return -ENODEV;
}

static inline bool is_nd_btt(struct device *dev)
{
	return false;
}

static inline struct device *nd_btt_create(struct nd_region *nd_region)
{
	return NULL;
}
#endif

struct nd_pfn *to_nd_pfn(struct device *dev);
#if IS_ENABLED(CONFIG_NVDIMM_PFN)

#define MAX_NVDIMM_ALIGN	4

int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns);
bool is_nd_pfn(struct device *dev);
struct device *nd_pfn_create(struct nd_region *nd_region);
struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn,
		struct nd_namespace_common *ndns);
int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig);
extern const struct attribute_group *nd_pfn_attribute_groups[];
#else
static inline int nd_pfn_probe(struct device *dev,
		struct nd_namespace_common *ndns)
{
	return -ENODEV;
}

static inline bool is_nd_pfn(struct device *dev)
{
	return false;
}

static inline struct device *nd_pfn_create(struct nd_region *nd_region)
{
	return NULL;
}

static inline int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
{
	return -ENODEV;
}
#endif

struct nd_dax *to_nd_dax(struct device *dev);
#if IS_ENABLED(CONFIG_NVDIMM_DAX)
int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns);
bool is_nd_dax(struct device *dev);
struct device *nd_dax_create(struct nd_region *nd_region);
#else
static inline int nd_dax_probe(struct device *dev,
		struct nd_namespace_common *ndns)
{
	return -ENODEV;
}

static inline bool is_nd_dax(struct device *dev)
{
	return false;
}

static inline struct device *nd_dax_create(struct nd_region *nd_region)
{
	return NULL;
}
#endif

int nd_region_to_nstype(struct nd_region *nd_region);
int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
u64 nd_region_interleave_set_cookie(struct nd_region *nd_region,
		struct nd_namespace_index *nsindex);
u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region);
void nvdimm_bus_lock(struct device *dev);
void nvdimm_bus_unlock(struct device *dev);
bool is_nvdimm_bus_locked(struct device *dev);
void nvdimm_check_and_set_ro(struct gendisk *disk);
void nvdimm_drvdata_release(struct kref *kref);
void put_ndd(struct nvdimm_drvdata *ndd);
int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
		struct nd_label_id *label_id, resource_size_t start,
		resource_size_t n);
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
bool nvdimm_namespace_locked(struct nd_namespace_common *ndns);
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
		char *name);
unsigned int pmem_sector_size(struct nd_namespace_common *ndns);
struct range;
void nvdimm_badblocks_populate(struct nd_region *nd_region,
		struct badblocks *bb, const struct range *range);
int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns,
		resource_size_t size);
void devm_namespace_disable(struct device *dev,
		struct nd_namespace_common *ndns);
#if IS_ENABLED(CONFIG_ND_CLAIM)
/* max struct page size independent of kernel config */
#define MAX_STRUCT_PAGE_SIZE 64
int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap);
#else
static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
				   struct dev_pagemap *pgmap)
{
	return -ENXIO;
}
#endif
int nd_region_activate(struct nd_region *nd_region);
static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
		unsigned int len)
{
	if (bb->count) {
		sector_t first_bad;
		int num_bad;

		return !!badblocks_check(bb, sector, len / 512, &first_bad,
				&num_bad);
	}

	return false;
}
const uuid_t *nd_dev_to_uuid(struct device *dev);
bool pmem_should_map_pages(struct device *dev);
#endif /* __ND_H__ */