[mirror_ubuntu-artful-kernel.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_data {
	int ns_count;
	int ns_active;
	unsigned int hints_shift;
	void __iomem *flush_wpq[0];
};

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);
}

#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;
};

struct nd_label_ent {
	struct list_head list;
	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;
	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;
	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);
	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;
	u64 size;
	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_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_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_aliasing(struct device *dev);
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);
int nd_region_activate(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;

	*start = jiffies;
	generic_start_io_acct(bio_data_dir(bio),
			      bio_sectors(bio), &disk->part0);
	return true;
}
static inline void nd_iostat_end(struct bio *bio, unsigned long start)
{
	struct gendisk *disk = bio->bi_bdev->bd_disk;

	generic_end_io_acct(bio_data_dir(bio), &disk->part0, 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
e5ae3b25 DW	52	struct nd_region_data {
	53	int ns_count;
	54	int ns_active;
595c7307 DW	55	unsigned int hints_shift;
595c7307 DW	56	void __iomem *flush_wpq[0];
3d88002e DW	57	};
3d88002e DW	58
595c7307 DW	59	static inline void __iomem ndrd_get_flush_wpq(struct nd_region_data ndrd,
	60	int dimm, int hint)
	61	{
	62	unsigned int num = 1 << ndrd->hints_shift;
	63	unsigned int mask = num - 1;
	64
	65	return ndrd->flush_wpq[dimm * num + (hint & mask)];
	66	}
	67
	68	static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm,
	69	int hint, void __iomem *flush)
	70	{
	71	unsigned int num = 1 << ndrd->hints_shift;
	72	unsigned int mask = num - 1;
	73
	74	ndrd->flush_wpq[dimm * num + (hint & mask)] = flush;
	75	}
	76
4a826c83 DW	77	static inline struct nd_namespace_index *to_namespace_index(
	78	struct nvdimm_drvdata *ndd, int i)
	79	{
	80	if (i < 0)
	81	return NULL;
	82
	83	return ndd->data + sizeof_namespace_index(ndd) * i;
	84	}
	85
	86	static inline struct nd_namespace_index *to_current_namespace_index(
	87	struct nvdimm_drvdata *ndd)
	88	{
	89	return to_namespace_index(ndd, ndd->ns_current);
	90	}
	91
	92	static inline struct nd_namespace_index *to_next_namespace_index(
	93	struct nvdimm_drvdata *ndd)
	94	{
	95	return to_namespace_index(ndd, ndd->ns_next);
	96	}
	97
	98	#define nd_dbg_dpa(r, d, res, fmt, arg...) \
	99	dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
	100	(r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
	101	(unsigned long long) (res ? resource_size(res) : 0), \
	102	(unsigned long long) (res ? res->start : 0), ##arg)
	103
bf9bccc1 DW	104	#define for_each_dpa_resource(ndd, res) \
	105	for (res = (ndd)->dpa.child; res; res = res->sibling)
	106
4a826c83 DW	107	#define for_each_dpa_resource_safe(ndd, res, next) \
	108	for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
	109	res; res = next, next = next ? next->sibling : NULL)
	110
5212e11f VV	111	struct nd_percpu_lane {
	112	int count;
	113	spinlock_t lock;
	114	};
	115
ae8219f1 DW	116	struct nd_label_ent {
	117	struct list_head list;
	118	struct nd_namespace_label *label;
	119	};
	120
	121	enum nd_mapping_lock_class {
	122	ND_MAPPING_CLASS0,
	123	ND_MAPPING_UUID_SCAN,
	124	};
	125
44c462eb DW	126	struct nd_mapping {
44c462eb DW	127	struct nvdimm *nvdimm;
44c462eb DW	128	u64 start;
44c462eb DW	129	u64 size;
ae8219f1 DW	130	struct list_head labels;
ae8219f1 DW	131	struct mutex lock;
44c462eb DW	132	/*
	133	* @ndd is for private use at region enable / disable time for
	134	* get_ndd() + put_ndd(), all other nd_mapping to ndd
	135	* conversions use to_ndd() which respects enabled state of the
	136	* nvdimm.
	137	*/
	138	struct nvdimm_drvdata *ndd;
	139	};
	140
1f7df6f8 DW	141	struct nd_region {
1f7df6f8 DW	142	struct device dev;
1b40e09a	143	struct ida ns_ida;
8c2f7e86	144	struct ida btt_ida;
e1455744	145	struct ida pfn_ida;
cd03412a	146	struct ida dax_ida;
004f1afb	147	unsigned long flags;
bf9bccc1	148	struct device *ns_seed;
8c2f7e86	149	struct device *btt_seed;
e1455744	150	struct device *pfn_seed;
cd03412a	151	struct device *dax_seed;
1f7df6f8 DW	152	u16 ndr_mappings;
	153	u64 ndr_size;
	154	u64 ndr_start;
41d7a6d6	155	int id, num_lanes, ro, numa_node;
1f7df6f8	156	void *provider_data;
eaf96153	157	struct nd_interleave_set *nd_set;
5212e11f	158	struct nd_percpu_lane __percpu *lane;
1f7df6f8 DW	159	struct nd_mapping mapping[0];
	160	};
	161
047fc8a1 RZ	162	struct nd_blk_region {
047fc8a1 RZ	163	int (enable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
047fc8a1 RZ	164	int (do_io)(struct nd_blk_region ndbr, resource_size_t dpa,
	165	void *iobuf, u64 len, int rw);
	166	void *blk_provider_data;
	167	struct nd_region nd_region;
	168	};
	169
4a826c83 DW	170	/*
	171	* Lookup next in the repeating sequence of 01, 10, and 11.
	172	*/
	173	static inline unsigned nd_inc_seq(unsigned seq)
	174	{
	175	static const unsigned next[] = { 0, 2, 3, 1 };
	176
	177	return next[seq & 3];
	178	}
f524bf27	179
5212e11f	180	struct btt;
8c2f7e86 DW	181	struct nd_btt {
	182	struct device dev;
	183	struct nd_namespace_common *ndns;
5212e11f	184	struct btt *btt;
8c2f7e86	185	unsigned long lbasize;
abe8b4e3	186	u64 size;
8c2f7e86 DW	187	u8 *uuid;
	188	int id;
	189	};
	190
e1455744 DW	191	enum nd_pfn_mode {
	192	PFN_MODE_NONE,
	193	PFN_MODE_RAM,
	194	PFN_MODE_PMEM,
	195	};
	196
	197	struct nd_pfn {
	198	int id;
	199	u8 *uuid;
	200	struct device dev;
315c5625	201	unsigned long align;
e1455744 DW	202	unsigned long npfns;
	203	enum nd_pfn_mode mode;
	204	struct nd_pfn_sb *pfn_sb;
	205	struct nd_namespace_common *ndns;
	206	};
	207
cd03412a DW	208	struct nd_dax {
	209	struct nd_pfn nd_pfn;
	210	};
	211
4d88a97a DW	212	enum nd_async_mode {
	213	ND_SYNC,
	214	ND_ASYNC,
	215	};
	216
41cd8b70	217	int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
bf9bccc1	218	void wait_nvdimm_bus_probe_idle(struct device *dev);
4d88a97a DW	219	void nd_device_register(struct device *dev);
4d88a97a DW	220	void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
71999466	221	void nd_device_notify(struct device *dev, enum nvdimm_event event);
bf9bccc1 DW	222	int nd_uuid_store(struct device dev, u8 uuid_out, const char buf,
bf9bccc1 DW	223	size_t len);
1b40e09a DW	224	ssize_t nd_sector_size_show(unsigned long current_lbasize,
	225	const unsigned long supported, char buf);
	226	ssize_t nd_sector_size_store(struct device dev, const char buf,
	227	unsigned long current_lbasize, const unsigned long supported);
4d88a97a	228	int __init nvdimm_init(void);
3d88002e	229	int __init nd_region_init(void);
4d88a97a	230	void nvdimm_exit(void);
3d88002e	231	void nd_region_exit(void);
bf9bccc1 DW	232	struct nvdimm;
bf9bccc1 DW	233	struct nvdimm_drvdata to_ndd(struct nd_mapping nd_mapping);
aee65987	234	int nvdimm_check_config_data(struct device *dev);
4d88a97a DW	235	int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
4d88a97a DW	236	int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
f524bf27 DW	237	int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
f524bf27 DW	238	void *buf, size_t len);
59e64739 DW	239	long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
59e64739 DW	240	unsigned int len);
42237e39	241	void nvdimm_set_aliasing(struct device *dev);
8c2f7e86	242	struct nd_btt to_nd_btt(struct device dev);
e1455744 DW	243
	244	struct nd_gen_sb {
	245	char reserved[SZ_4K - 8];
	246	__le64 checksum;
	247	};
	248
	249	u64 nd_sb_checksum(struct nd_gen_sb *sb);
8c2f7e86	250	#if IS_ENABLED(CONFIG_BTT)
200c79da	251	int nd_btt_probe(struct device dev, struct nd_namespace_common ndns);
8c2f7e86 DW	252	bool is_nd_btt(struct device *dev);
	253	struct device nd_btt_create(struct nd_region nd_region);
	254	#else
e32bc729	255	static inline int nd_btt_probe(struct device *dev,
200c79da	256	struct nd_namespace_common *ndns)
8c2f7e86 DW	257	{
	258	return -ENODEV;
	259	}
	260
	261	static inline bool is_nd_btt(struct device *dev)
	262	{
	263	return false;
	264	}
	265
	266	static inline struct device nd_btt_create(struct nd_region nd_region)
	267	{
	268	return NULL;
	269	}
e1455744	270	#endif
8c2f7e86	271
e1455744 DW	272	struct nd_pfn to_nd_pfn(struct device dev);
e1455744 DW	273	#if IS_ENABLED(CONFIG_NVDIMM_PFN)
200c79da	274	int nd_pfn_probe(struct device dev, struct nd_namespace_common ndns);
e1455744 DW	275	bool is_nd_pfn(struct device *dev);
e1455744 DW	276	struct device nd_pfn_create(struct nd_region nd_region);
cd03412a DW	277	struct device nd_pfn_devinit(struct nd_pfn nd_pfn,
cd03412a DW	278	struct nd_namespace_common *ndns);
c5ed9268	279	int nd_pfn_validate(struct nd_pfn nd_pfn, const char sig);
cd03412a	280	extern struct attribute_group nd_pfn_attribute_group;
e1455744	281	#else
200c79da DW	282	static inline int nd_pfn_probe(struct device *dev,
200c79da DW	283	struct nd_namespace_common *ndns)
e1455744 DW	284	{
	285	return -ENODEV;
	286	}
	287
	288	static inline bool is_nd_pfn(struct device *dev)
	289	{
	290	return false;
	291	}
	292
	293	static inline struct device nd_pfn_create(struct nd_region nd_region)
	294	{
	295	return NULL;
	296	}
32ab0a3f	297
c5ed9268	298	static inline int nd_pfn_validate(struct nd_pfn nd_pfn, const char sig)
32ab0a3f DW	299	{
	300	return -ENODEV;
	301	}
8c2f7e86	302	#endif
e1455744	303
cd03412a DW	304	struct nd_dax to_nd_dax(struct device dev);
cd03412a DW	305	#if IS_ENABLED(CONFIG_NVDIMM_DAX)
c5ed9268	306	int nd_dax_probe(struct device dev, struct nd_namespace_common ndns);
cd03412a DW	307	bool is_nd_dax(struct device *dev);
	308	struct device nd_dax_create(struct nd_region nd_region);
	309	#else
c5ed9268 DW	310	static inline int nd_dax_probe(struct device *dev,
	311	struct nd_namespace_common *ndns)
	312	{
	313	return -ENODEV;
	314	}
	315
cd03412a DW	316	static inline bool is_nd_dax(struct device *dev)
	317	{
	318	return false;
	319	}
	320
	321	static inline struct device nd_dax_create(struct nd_region nd_region)
	322	{
	323	return NULL;
	324	}
	325	#endif
	326
3d88002e DW	327	struct nd_region to_nd_region(struct device dev);
	328	int nd_region_to_nstype(struct nd_region *nd_region);
	329	int nd_region_register_namespaces(struct nd_region nd_region, int err);
bf9bccc1	330	u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
3d88002e DW	331	void nvdimm_bus_lock(struct device *dev);
	332	void nvdimm_bus_unlock(struct device *dev);
	333	bool is_nvdimm_bus_locked(struct device *dev);
58138820	334	int nvdimm_revalidate_disk(struct gendisk *disk);
bf9bccc1 DW	335	void nvdimm_drvdata_release(struct kref *kref);
bf9bccc1 DW	336	void put_ndd(struct nvdimm_drvdata *ndd);
4a826c83 DW	337	int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
	338	void nvdimm_free_dpa(struct nvdimm_drvdata ndd, struct resource res);
	339	struct resource nvdimm_allocate_dpa(struct nvdimm_drvdata ndd,
	340	struct nd_label_id *label_id, resource_size_t start,
	341	resource_size_t n);
8c2f7e86 DW	342	resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
8c2f7e86 DW	343	struct nd_namespace_common nvdimm_namespace_common_probe(struct device dev);
5212e11f	344	int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
298f2bc5	345	int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
5212e11f VV	346	const char nvdimm_namespace_disk_name(struct nd_namespace_common ndns,
5212e11f VV	347	char *name);
a3901802 DW	348	void nvdimm_badblocks_populate(struct nd_region *nd_region,
a3901802 DW	349	struct badblocks bb, const struct resource res);
200c79da	350	#if IS_ENABLED(CONFIG_ND_CLAIM)
ac515c08 DW	351	struct vmem_altmap nvdimm_setup_pfn(struct nd_pfn nd_pfn,
ac515c08 DW	352	struct resource res, struct vmem_altmap altmap);
200c79da DW	353	int devm_nsio_enable(struct device dev, struct nd_namespace_io nsio);
	354	void devm_nsio_disable(struct device dev, struct nd_namespace_io nsio);
	355	#else
ac515c08 DW	356	static inline struct vmem_altmap nvdimm_setup_pfn(struct nd_pfn nd_pfn,
	357	struct resource res, struct vmem_altmap altmap)
	358	{
	359	return ERR_PTR(-ENXIO);
	360	}
200c79da DW	361	static inline int devm_nsio_enable(struct device *dev,
	362	struct nd_namespace_io *nsio)
	363	{
	364	return -ENXIO;
	365	}
	366	static inline void devm_nsio_disable(struct device *dev,
	367	struct nd_namespace_io *nsio)
	368	{
	369	}
	370	#endif
047fc8a1	371	int nd_blk_region_init(struct nd_region *nd_region);
e5ae3b25	372	int nd_region_activate(struct nd_region *nd_region);
f0dc089c DW	373	void __nd_iostat_start(struct bio bio, unsigned long start);
	374	static inline bool nd_iostat_start(struct bio bio, unsigned long start)
	375	{
	376	struct gendisk *disk = bio->bi_bdev->bd_disk;
	377
	378	if (!blk_queue_io_stat(disk->queue))
	379	return false;
	380
8d7c22ac TK	381	*start = jiffies;
	382	generic_start_io_acct(bio_data_dir(bio),
	383	bio_sectors(bio), &disk->part0);
f0dc089c DW	384	return true;
f0dc089c DW	385	}
8d7c22ac TK	386	static inline void nd_iostat_end(struct bio *bio, unsigned long start)
	387	{
	388	struct gendisk *disk = bio->bi_bdev->bd_disk;
	389
	390	generic_end_io_acct(bio_data_dir(bio), &disk->part0, start);
	391	}
200c79da DW	392	static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
	393	unsigned int len)
	394	{
	395	if (bb->count) {
	396	sector_t first_bad;
	397	int num_bad;
	398
	399	return !!badblocks_check(bb, sector, len / 512, &first_bad,
	400	&num_bad);
	401	}
	402
	403	return false;
	404	}
047fc8a1	405	resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
6ec68954	406	const u8 nd_dev_to_uuid(struct device dev);
004f1afb	407	bool pmem_should_map_pages(struct device *dev);
4d88a97a	408	#endif /* __ND_H__ */