[deliverable/linux.git] / drivers / nvdimm / nd.h

/*
 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */
#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,
	SECTOR_SHIFT = 9,
	INT_LBASIZE_ALIGNMENT = 64,
};

struct nd_poison {
	u64 start;
	u64 length;
	struct list_head list;
};

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

struct nd_region_namespaces {
	int count;
	int active;
};

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);
}

#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_label(l, label, labels) \
	for (l = 0; (label = labels ? labels[l] : NULL); l++)

#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;
};

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;
	u16 ndr_mappings;
	u64 ndr_size;
	u64 ndr_start;
	int id, num_lanes, ro, numa_node;
	void *provider_data;
	struct nd_interleave_set *nd_set;
	struct nd_percpu_lane __percpu *lane;
	struct nd_mapping mapping[0];
};

struct nd_blk_region {
	int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
	void (*disable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
	int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
			void *iobuf, u64 len, int rw);
	void *blk_provider_data;
	struct nd_region nd_region;
};

/*
 * 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;
	u8 *uuid;
	int id;
};

enum nd_pfn_mode {
	PFN_MODE_NONE,
	PFN_MODE_RAM,
	PFN_MODE_PMEM,
};

struct nd_pfn {
	int id;
	u8 *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;
};

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, u8 **uuid_out, const char *buf,
		size_t len);
ssize_t nd_sector_size_show(unsigned long current_lbasize,
		const unsigned long *supported, char *buf);
ssize_t nd_sector_size_store(struct device *dev, const char *buf,
		unsigned long *current_lbasize, const unsigned long *supported);
int __init nvdimm_init(void);
int __init nd_region_init(void);
void nvdimm_exit(void);
void nd_region_exit(void);
struct nvdimm;
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
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);
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)
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 struct attribute_group nd_pfn_attribute_group;
#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

struct nd_region *to_nd_region(struct device *dev);
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);
void nvdimm_bus_lock(struct device *dev);
void nvdimm_bus_unlock(struct device *dev);
bool is_nvdimm_bus_locked(struct device *dev);
int nvdimm_revalidate_disk(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);
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);
void nvdimm_badblocks_populate(struct nd_region *nd_region,
		struct badblocks *bb, const struct resource *res);
#if IS_ENABLED(CONFIG_ND_CLAIM)
struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
		struct resource *res, struct vmem_altmap *altmap);
int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio);
void devm_nsio_disable(struct device *dev, struct nd_namespace_io *nsio);
#else
static inline struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
		struct resource *res, struct vmem_altmap *altmap)
{
	return ERR_PTR(-ENXIO);
}
static inline int devm_nsio_enable(struct device *dev,
		struct nd_namespace_io *nsio)
{
	return -ENXIO;
}
static inline void devm_nsio_disable(struct device *dev,
		struct nd_namespace_io *nsio)
{
}
#endif
int nd_blk_region_init(struct nd_region *nd_region);
void __nd_iostat_start(struct bio *bio, unsigned long *start);
static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
{
	struct gendisk *disk = bio->bi_bdev->bd_disk;

	if (!blk_queue_io_stat(disk->queue))
		return false;

	__nd_iostat_start(bio, start);
	return true;
}
void nd_iostat_end(struct bio *bio, unsigned long start);
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;
}
resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
const u8 *nd_dev_to_uuid(struct device *dev);
bool pmem_should_map_pages(struct device *dev);
#endif /* __ND_H__ */
Commit	Line	Data
4d88a97a DW	1	/*
	2	* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of version 2 of the GNU General Public License as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*/
	13	#ifndef __ND_H__
	14	#define __ND_H__
1f7df6f8	15	#include <linux/libnvdimm.h>
200c79da	16	#include <linux/badblocks.h>
f0dc089c	17	#include <linux/blkdev.h>
4d88a97a DW	18	#include <linux/device.h>
	19	#include <linux/mutex.h>
	20	#include <linux/ndctl.h>
bf9bccc1	21	#include <linux/types.h>
71999466	22	#include <linux/nd.h>
4a826c83	23	#include "label.h"
4d88a97a	24
8c2f7e86	25	enum {
5212e11f VV	26	/*
	27	* Limits the maximum number of block apertures a dimm can
	28	* support and is an input to the geometry/on-disk-format of a
	29	* BTT instance
	30	*/
	31	ND_MAX_LANES = 256,
8c2f7e86	32	SECTOR_SHIFT = 9,
fcae6957	33	INT_LBASIZE_ALIGNMENT = 64,
8c2f7e86 DW	34	};
8c2f7e86 DW	35
0caeef63 VV	36	struct nd_poison {
	37	u64 start;
	38	u64 length;
	39	struct list_head list;
	40	};
	41
4d88a97a DW	42	struct nvdimm_drvdata {
4d88a97a DW	43	struct device *dev;
4a826c83	44	int nsindex_size;
4d88a97a DW	45	struct nd_cmd_get_config_size nsarea;
4d88a97a DW	46	void *data;
4a826c83 DW	47	int ns_current, ns_next;
4a826c83 DW	48	struct resource dpa;
bf9bccc1	49	struct kref kref;
4d88a97a DW	50	};
4d88a97a DW	51
3d88002e DW	52	struct nd_region_namespaces {
	53	int count;
	54	int active;
	55	};
	56
4a826c83 DW	57	static inline struct nd_namespace_index *to_namespace_index(
	58	struct nvdimm_drvdata *ndd, int i)
	59	{
	60	if (i < 0)
	61	return NULL;
	62
	63	return ndd->data + sizeof_namespace_index(ndd) * i;
	64	}
	65
	66	static inline struct nd_namespace_index *to_current_namespace_index(
	67	struct nvdimm_drvdata *ndd)
	68	{
	69	return to_namespace_index(ndd, ndd->ns_current);
	70	}
	71
	72	static inline struct nd_namespace_index *to_next_namespace_index(
	73	struct nvdimm_drvdata *ndd)
	74	{
	75	return to_namespace_index(ndd, ndd->ns_next);
	76	}
	77
	78	#define nd_dbg_dpa(r, d, res, fmt, arg...) \
	79	dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
	80	(r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
	81	(unsigned long long) (res ? resource_size(res) : 0), \
	82	(unsigned long long) (res ? res->start : 0), ##arg)
	83
bf9bccc1 DW	84	#define for_each_label(l, label, labels) \
	85	for (l = 0; (label = labels ? labels[l] : NULL); l++)
	86
	87	#define for_each_dpa_resource(ndd, res) \
	88	for (res = (ndd)->dpa.child; res; res = res->sibling)
	89
4a826c83 DW	90	#define for_each_dpa_resource_safe(ndd, res, next) \
	91	for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
	92	res; res = next, next = next ? next->sibling : NULL)
	93
5212e11f VV	94	struct nd_percpu_lane {
	95	int count;
	96	spinlock_t lock;
	97	};
	98
1f7df6f8 DW	99	struct nd_region {
1f7df6f8 DW	100	struct device dev;
1b40e09a	101	struct ida ns_ida;
8c2f7e86	102	struct ida btt_ida;
e1455744	103	struct ida pfn_ida;
cd03412a	104	struct ida dax_ida;
004f1afb	105	unsigned long flags;
bf9bccc1	106	struct device *ns_seed;
8c2f7e86	107	struct device *btt_seed;
e1455744	108	struct device *pfn_seed;
cd03412a	109	struct device *dax_seed;
1f7df6f8 DW	110	u16 ndr_mappings;
	111	u64 ndr_size;
	112	u64 ndr_start;
41d7a6d6	113	int id, num_lanes, ro, numa_node;
1f7df6f8	114	void *provider_data;
eaf96153	115	struct nd_interleave_set *nd_set;
5212e11f	116	struct nd_percpu_lane __percpu *lane;
1f7df6f8 DW	117	struct nd_mapping mapping[0];
	118	};
	119
047fc8a1 RZ	120	struct nd_blk_region {
	121	int (enable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
	122	void (disable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
	123	int (do_io)(struct nd_blk_region ndbr, resource_size_t dpa,
	124	void *iobuf, u64 len, int rw);
	125	void *blk_provider_data;
	126	struct nd_region nd_region;
	127	};
	128
4a826c83 DW	129	/*
	130	* Lookup next in the repeating sequence of 01, 10, and 11.
	131	*/
	132	static inline unsigned nd_inc_seq(unsigned seq)
	133	{
	134	static const unsigned next[] = { 0, 2, 3, 1 };
	135
	136	return next[seq & 3];
	137	}
f524bf27	138
5212e11f	139	struct btt;
8c2f7e86 DW	140	struct nd_btt {
	141	struct device dev;
	142	struct nd_namespace_common *ndns;
5212e11f	143	struct btt *btt;
8c2f7e86 DW	144	unsigned long lbasize;
	145	u8 *uuid;
	146	int id;
	147	};
	148
e1455744 DW	149	enum nd_pfn_mode {
	150	PFN_MODE_NONE,
	151	PFN_MODE_RAM,
	152	PFN_MODE_PMEM,
	153	};
	154
	155	struct nd_pfn {
	156	int id;
	157	u8 *uuid;
	158	struct device dev;
315c5625	159	unsigned long align;
e1455744 DW	160	unsigned long npfns;
	161	enum nd_pfn_mode mode;
	162	struct nd_pfn_sb *pfn_sb;
	163	struct nd_namespace_common *ndns;
	164	};
	165
cd03412a DW	166	struct nd_dax {
	167	struct nd_pfn nd_pfn;
	168	};
	169
4d88a97a DW	170	enum nd_async_mode {
	171	ND_SYNC,
	172	ND_ASYNC,
	173	};
	174
41cd8b70	175	int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
bf9bccc1	176	void wait_nvdimm_bus_probe_idle(struct device *dev);
4d88a97a DW	177	void nd_device_register(struct device *dev);
4d88a97a DW	178	void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
71999466	179	void nd_device_notify(struct device *dev, enum nvdimm_event event);
bf9bccc1 DW	180	int nd_uuid_store(struct device dev, u8 uuid_out, const char buf,
bf9bccc1 DW	181	size_t len);
1b40e09a DW	182	ssize_t nd_sector_size_show(unsigned long current_lbasize,
	183	const unsigned long supported, char buf);
	184	ssize_t nd_sector_size_store(struct device dev, const char buf,
	185	unsigned long current_lbasize, const unsigned long supported);
4d88a97a	186	int __init nvdimm_init(void);
3d88002e	187	int __init nd_region_init(void);
4d88a97a	188	void nvdimm_exit(void);
3d88002e	189	void nd_region_exit(void);
bf9bccc1 DW	190	struct nvdimm;
bf9bccc1 DW	191	struct nvdimm_drvdata to_ndd(struct nd_mapping nd_mapping);
4d88a97a DW	192	int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
4d88a97a DW	193	int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
f524bf27 DW	194	int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
f524bf27 DW	195	void *buf, size_t len);
59e64739 DW	196	long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
59e64739 DW	197	unsigned int len);
8c2f7e86	198	struct nd_btt to_nd_btt(struct device dev);
e1455744 DW	199
	200	struct nd_gen_sb {
	201	char reserved[SZ_4K - 8];
	202	__le64 checksum;
	203	};
	204
	205	u64 nd_sb_checksum(struct nd_gen_sb *sb);
8c2f7e86	206	#if IS_ENABLED(CONFIG_BTT)
200c79da	207	int nd_btt_probe(struct device dev, struct nd_namespace_common ndns);
8c2f7e86 DW	208	bool is_nd_btt(struct device *dev);
	209	struct device nd_btt_create(struct nd_region nd_region);
	210	#else
e32bc729	211	static inline int nd_btt_probe(struct device *dev,
200c79da	212	struct nd_namespace_common *ndns)
8c2f7e86 DW	213	{
	214	return -ENODEV;
	215	}
	216
	217	static inline bool is_nd_btt(struct device *dev)
	218	{
	219	return false;
	220	}
	221
	222	static inline struct device nd_btt_create(struct nd_region nd_region)
	223	{
	224	return NULL;
	225	}
e1455744	226	#endif
8c2f7e86	227
e1455744 DW	228	struct nd_pfn to_nd_pfn(struct device dev);
e1455744 DW	229	#if IS_ENABLED(CONFIG_NVDIMM_PFN)
200c79da	230	int nd_pfn_probe(struct device dev, struct nd_namespace_common ndns);
e1455744 DW	231	bool is_nd_pfn(struct device *dev);
e1455744 DW	232	struct device nd_pfn_create(struct nd_region nd_region);
cd03412a DW	233	struct device nd_pfn_devinit(struct nd_pfn nd_pfn,
cd03412a DW	234	struct nd_namespace_common *ndns);
c5ed9268	235	int nd_pfn_validate(struct nd_pfn nd_pfn, const char sig);
cd03412a	236	extern struct attribute_group nd_pfn_attribute_group;
e1455744	237	#else
200c79da DW	238	static inline int nd_pfn_probe(struct device *dev,
200c79da DW	239	struct nd_namespace_common *ndns)
e1455744 DW	240	{
	241	return -ENODEV;
	242	}
	243
	244	static inline bool is_nd_pfn(struct device *dev)
	245	{
	246	return false;
	247	}
	248
	249	static inline struct device nd_pfn_create(struct nd_region nd_region)
	250	{
	251	return NULL;
	252	}
32ab0a3f	253
c5ed9268	254	static inline int nd_pfn_validate(struct nd_pfn nd_pfn, const char sig)
32ab0a3f DW	255	{
	256	return -ENODEV;
	257	}
8c2f7e86	258	#endif
e1455744	259
cd03412a DW	260	struct nd_dax to_nd_dax(struct device dev);
cd03412a DW	261	#if IS_ENABLED(CONFIG_NVDIMM_DAX)
c5ed9268	262	int nd_dax_probe(struct device dev, struct nd_namespace_common ndns);
cd03412a DW	263	bool is_nd_dax(struct device *dev);
	264	struct device nd_dax_create(struct nd_region nd_region);
	265	#else
c5ed9268 DW	266	static inline int nd_dax_probe(struct device *dev,
	267	struct nd_namespace_common *ndns)
	268	{
	269	return -ENODEV;
	270	}
	271
cd03412a DW	272	static inline bool is_nd_dax(struct device *dev)
	273	{
	274	return false;
	275	}
	276
	277	static inline struct device nd_dax_create(struct nd_region nd_region)
	278	{
	279	return NULL;
	280	}
	281	#endif
	282
3d88002e DW	283	struct nd_region to_nd_region(struct device dev);
	284	int nd_region_to_nstype(struct nd_region *nd_region);
	285	int nd_region_register_namespaces(struct nd_region nd_region, int err);
bf9bccc1	286	u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
3d88002e DW	287	void nvdimm_bus_lock(struct device *dev);
	288	void nvdimm_bus_unlock(struct device *dev);
	289	bool is_nvdimm_bus_locked(struct device *dev);
58138820	290	int nvdimm_revalidate_disk(struct gendisk *disk);
bf9bccc1 DW	291	void nvdimm_drvdata_release(struct kref *kref);
bf9bccc1 DW	292	void put_ndd(struct nvdimm_drvdata *ndd);
4a826c83 DW	293	int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
	294	void nvdimm_free_dpa(struct nvdimm_drvdata ndd, struct resource res);
	295	struct resource nvdimm_allocate_dpa(struct nvdimm_drvdata ndd,
	296	struct nd_label_id *label_id, resource_size_t start,
	297	resource_size_t n);
8c2f7e86 DW	298	resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
8c2f7e86 DW	299	struct nd_namespace_common nvdimm_namespace_common_probe(struct device dev);
5212e11f	300	int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
298f2bc5	301	int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
5212e11f VV	302	const char nvdimm_namespace_disk_name(struct nd_namespace_common ndns,
5212e11f VV	303	char *name);
a3901802 DW	304	void nvdimm_badblocks_populate(struct nd_region *nd_region,
a3901802 DW	305	struct badblocks bb, const struct resource res);
200c79da	306	#if IS_ENABLED(CONFIG_ND_CLAIM)
ac515c08 DW	307	struct vmem_altmap nvdimm_setup_pfn(struct nd_pfn nd_pfn,
ac515c08 DW	308	struct resource res, struct vmem_altmap altmap);
200c79da DW	309	int devm_nsio_enable(struct device dev, struct nd_namespace_io nsio);
	310	void devm_nsio_disable(struct device dev, struct nd_namespace_io nsio);
	311	#else
ac515c08 DW	312	static inline struct vmem_altmap nvdimm_setup_pfn(struct nd_pfn nd_pfn,
	313	struct resource res, struct vmem_altmap altmap)
	314	{
	315	return ERR_PTR(-ENXIO);
	316	}
200c79da DW	317	static inline int devm_nsio_enable(struct device *dev,
	318	struct nd_namespace_io *nsio)
	319	{
	320	return -ENXIO;
	321	}
	322	static inline void devm_nsio_disable(struct device *dev,
	323	struct nd_namespace_io *nsio)
	324	{
	325	}
	326	#endif
047fc8a1	327	int nd_blk_region_init(struct nd_region *nd_region);
f0dc089c DW	328	void __nd_iostat_start(struct bio bio, unsigned long start);
	329	static inline bool nd_iostat_start(struct bio bio, unsigned long start)
	330	{
	331	struct gendisk *disk = bio->bi_bdev->bd_disk;
	332
	333	if (!blk_queue_io_stat(disk->queue))
	334	return false;
	335
	336	__nd_iostat_start(bio, start);
	337	return true;
	338	}
	339	void nd_iostat_end(struct bio *bio, unsigned long start);
200c79da DW	340	static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
	341	unsigned int len)
	342	{
	343	if (bb->count) {
	344	sector_t first_bad;
	345	int num_bad;
	346
	347	return !!badblocks_check(bb, sector, len / 512, &first_bad,
	348	&num_bad);
	349	}
	350
	351	return false;
	352	}
047fc8a1	353	resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
6ec68954	354	const u8 nd_dev_to_uuid(struct device dev);
004f1afb	355	bool pmem_should_map_pages(struct device *dev);
4d88a97a	356	#endif /* __ND_H__ */