[linux-block.git] / include / linux / libnvdimm.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * libnvdimm - Non-volatile-memory Devices Subsystem
 *
 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
 */
#ifndef __LIBNVDIMM_H__
#define __LIBNVDIMM_H__
#include <linux/kernel.h>
#include <linux/sizes.h>
#include <linux/types.h>
#include <linux/uuid.h>
#include <linux/spinlock.h>
#include <linux/bio.h>

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

struct badrange {
	struct list_head list;
	spinlock_t lock;
};

enum {
	/* when a dimm supports both PMEM and BLK access a label is required */
	NDD_ALIASING = 0,
	/* unarmed memory devices may not persist writes */
	NDD_UNARMED = 1,
	/* locked memory devices should not be accessed */
	NDD_LOCKED = 2,
	/* memory under security wipes should not be accessed */
	NDD_SECURITY_OVERWRITE = 3,
	/*  tracking whether or not there is a pending device reference */
	NDD_WORK_PENDING = 4,
	/* ignore / filter NSLABEL_FLAG_LOCAL for this DIMM, i.e. no aliasing */
	NDD_NOBLK = 5,
	/* dimm supports namespace labels */
	NDD_LABELING = 6,

	/* need to set a limit somewhere, but yes, this is likely overkill */
	ND_IOCTL_MAX_BUFLEN = SZ_4M,
	ND_CMD_MAX_ELEM = 5,
	ND_CMD_MAX_ENVELOPE = 256,
	ND_MAX_MAPPINGS = 32,

	/* region flag indicating to direct-map persistent memory by default */
	ND_REGION_PAGEMAP = 0,
	/*
	 * Platform ensures entire CPU store data path is flushed to pmem on
	 * system power loss.
	 */
	ND_REGION_PERSIST_CACHE = 1,
	/*
	 * Platform provides mechanisms to automatically flush outstanding
	 * write data from memory controler to pmem on system power loss.
	 * (ADR)
	 */
	ND_REGION_PERSIST_MEMCTRL = 2,

	/* Platform provides asynchronous flush mechanism */
	ND_REGION_ASYNC = 3,

	/* mark newly adjusted resources as requiring a label update */
	DPA_RESOURCE_ADJUSTED = 1 << 0,
};

struct nvdimm;
struct nvdimm_bus_descriptor;
typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
		struct nvdimm *nvdimm, unsigned int cmd, void *buf,
		unsigned int buf_len, int *cmd_rc);

struct device_node;
struct nvdimm_bus_descriptor {
	const struct attribute_group **attr_groups;
	unsigned long cmd_mask;
	unsigned long dimm_family_mask;
	unsigned long bus_family_mask;
	struct module *module;
	char *provider_name;
	struct device_node *of_node;
	ndctl_fn ndctl;
	int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
	int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
			struct nvdimm *nvdimm, unsigned int cmd, void *data);
};

struct nd_cmd_desc {
	int in_num;
	int out_num;
	u32 in_sizes[ND_CMD_MAX_ELEM];
	int out_sizes[ND_CMD_MAX_ELEM];
};

struct nd_interleave_set {
	/* v1.1 definition of the interleave-set-cookie algorithm */
	u64 cookie1;
	/* v1.2 definition of the interleave-set-cookie algorithm */
	u64 cookie2;
	/* compatibility with initial buggy Linux implementation */
	u64 altcookie;

	guid_t type_guid;
};

struct nd_mapping_desc {
	struct nvdimm *nvdimm;
	u64 start;
	u64 size;
	int position;
};

struct nd_region;
struct nd_region_desc {
	struct resource *res;
	struct nd_mapping_desc *mapping;
	u16 num_mappings;
	const struct attribute_group **attr_groups;
	struct nd_interleave_set *nd_set;
	void *provider_data;
	int num_lanes;
	int numa_node;
	int target_node;
	unsigned long flags;
	struct device_node *of_node;
	int (*flush)(struct nd_region *nd_region, struct bio *bio);
};

struct device;
void *devm_nvdimm_memremap(struct device *dev, resource_size_t offset,
		size_t size, unsigned long flags);
static inline void __iomem *devm_nvdimm_ioremap(struct device *dev,
		resource_size_t offset, size_t size)
{
	return (void __iomem *) devm_nvdimm_memremap(dev, offset, size, 0);
}

struct nvdimm_bus;
struct module;
struct device;
struct nd_blk_region;
struct nd_blk_region_desc {
	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);
	struct nd_region_desc ndr_desc;
};

static inline struct nd_blk_region_desc *to_blk_region_desc(
		struct nd_region_desc *ndr_desc)
{
	return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);

}

/*
 * Note that separate bits for locked + unlocked are defined so that
 * 'flags == 0' corresponds to an error / not-supported state.
 */
enum nvdimm_security_bits {
	NVDIMM_SECURITY_DISABLED,
	NVDIMM_SECURITY_UNLOCKED,
	NVDIMM_SECURITY_LOCKED,
	NVDIMM_SECURITY_FROZEN,
	NVDIMM_SECURITY_OVERWRITE,
};

#define NVDIMM_PASSPHRASE_LEN		32
#define NVDIMM_KEY_DESC_LEN		22

struct nvdimm_key_data {
	u8 data[NVDIMM_PASSPHRASE_LEN];
};

enum nvdimm_passphrase_type {
	NVDIMM_USER,
	NVDIMM_MASTER,
};

struct nvdimm_security_ops {
	unsigned long (*get_flags)(struct nvdimm *nvdimm,
			enum nvdimm_passphrase_type pass_type);
	int (*freeze)(struct nvdimm *nvdimm);
	int (*change_key)(struct nvdimm *nvdimm,
			const struct nvdimm_key_data *old_data,
			const struct nvdimm_key_data *new_data,
			enum nvdimm_passphrase_type pass_type);
	int (*unlock)(struct nvdimm *nvdimm,
			const struct nvdimm_key_data *key_data);
	int (*disable)(struct nvdimm *nvdimm,
			const struct nvdimm_key_data *key_data);
	int (*erase)(struct nvdimm *nvdimm,
			const struct nvdimm_key_data *key_data,
			enum nvdimm_passphrase_type pass_type);
	int (*overwrite)(struct nvdimm *nvdimm,
			const struct nvdimm_key_data *key_data);
	int (*query_overwrite)(struct nvdimm *nvdimm);
};

void badrange_init(struct badrange *badrange);
int badrange_add(struct badrange *badrange, u64 addr, u64 length);
void badrange_forget(struct badrange *badrange, phys_addr_t start,
		unsigned int len);
int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr,
		u64 length);
struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
		struct nvdimm_bus_descriptor *nfit_desc);
void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm);
struct nvdimm *to_nvdimm(struct device *dev);
struct nd_region *to_nd_region(struct device *dev);
struct device *nd_region_dev(struct nd_region *nd_region);
struct nd_blk_region *to_nd_blk_region(struct device *dev);
struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus);
const char *nvdimm_name(struct nvdimm *nvdimm);
struct kobject *nvdimm_kobj(struct nvdimm *nvdimm);
unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
void *nvdimm_provider_data(struct nvdimm *nvdimm);
struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
		void *provider_data, const struct attribute_group **groups,
		unsigned long flags, unsigned long cmd_mask, int num_flush,
		struct resource *flush_wpq, const char *dimm_id,
		const struct nvdimm_security_ops *sec_ops);
static inline struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus,
		void *provider_data, const struct attribute_group **groups,
		unsigned long flags, unsigned long cmd_mask, int num_flush,
		struct resource *flush_wpq)
{
	return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
			cmd_mask, num_flush, flush_wpq, NULL, NULL);
}

const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
		const struct nd_cmd_desc *desc, int idx, void *buf);
u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
		const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
		const u32 *out_field, unsigned long remainder);
int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
struct nd_region *nvdimm_pmem_region_create(struct nvdimm_bus *nvdimm_bus,
		struct nd_region_desc *ndr_desc);
struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus,
		struct nd_region_desc *ndr_desc);
struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus,
		struct nd_region_desc *ndr_desc);
void *nd_region_provider_data(struct nd_region *nd_region);
void *nd_blk_region_provider_data(struct nd_blk_region *ndbr);
void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data);
struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr);
unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr);
unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
u64 nd_fletcher64(void *addr, size_t len, bool le);
int nvdimm_flush(struct nd_region *nd_region, struct bio *bio);
int generic_nvdimm_flush(struct nd_region *nd_region);
int nvdimm_has_flush(struct nd_region *nd_region);
int nvdimm_has_cache(struct nd_region *nd_region);
int nvdimm_in_overwrite(struct nvdimm *nvdimm);
bool is_nvdimm_sync(struct nd_region *nd_region);

static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
		unsigned int buf_len, int *cmd_rc)
{
	struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
	struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);

	return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
}

#ifdef CONFIG_ARCH_HAS_PMEM_API
#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
void arch_wb_cache_pmem(void *addr, size_t size);
void arch_invalidate_pmem(void *addr, size_t size);
#else
#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
static inline void arch_wb_cache_pmem(void *addr, size_t size)
{
}
static inline void arch_invalidate_pmem(void *addr, size_t size)
{
}
#endif

#endif /* __LIBNVDIMM_H__ */
Commit	Line	Data
5b497af4	1	/* SPDX-License-Identifier: GPL-2.0-only */
b94d5230 DW	2	/*
	3	* libnvdimm - Non-volatile-memory Devices Subsystem
	4	*
	5	* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
b94d5230 DW	6	*/
	7	#ifndef __LIBNVDIMM_H__
	8	#define __LIBNVDIMM_H__
047fc8a1	9	#include <linux/kernel.h>
62232e45 DW	10	#include <linux/sizes.h>
62232e45 DW	11	#include <linux/types.h>
faec6f8a	12	#include <linux/uuid.h>
aa9ad44a	13	#include <linux/spinlock.h>
c5d4355d	14	#include <linux/bio.h>
aa9ad44a DJ	15
	16	struct badrange_entry {
	17	u64 start;
	18	u64 length;
	19	struct list_head list;
	20	};
	21
	22	struct badrange {
	23	struct list_head list;
	24	spinlock_t lock;
	25	};
e6dfb2de DW	26
	27	enum {
	28	/* when a dimm supports both PMEM and BLK access a label is required */
8f078b38	29	NDD_ALIASING = 0,
58138820	30	/* unarmed memory devices may not persist writes */
8f078b38 DW	31	NDD_UNARMED = 1,
	32	/* locked memory devices should not be accessed */
	33	NDD_LOCKED = 2,
7d988097 DJ	34	/* memory under security wipes should not be accessed */
	35	NDD_SECURITY_OVERWRITE = 3,
	36	/* tracking whether or not there is a pending device reference */
	37	NDD_WORK_PENDING = 4,
d5d30d5a DW	38	/* ignore / filter NSLABEL_FLAG_LOCAL for this DIMM, i.e. no aliasing */
d5d30d5a DW	39	NDD_NOBLK = 5,
a0e37452 DW	40	/* dimm supports namespace labels */
a0e37452 DW	41	NDD_LABELING = 6,
62232e45 DW	42
	43	/* need to set a limit somewhere, but yes, this is likely overkill */
	44	ND_IOCTL_MAX_BUFLEN = SZ_4M,
4577b066	45	ND_CMD_MAX_ELEM = 5,
40abf9be	46	ND_CMD_MAX_ENVELOPE = 256,
1f7df6f8	47	ND_MAX_MAPPINGS = 32,
1b40e09a	48
004f1afb DW	49	/* region flag indicating to direct-map persistent memory by default */
004f1afb DW	50	ND_REGION_PAGEMAP = 0,
06e8ccda DJ	51	/*
	52	* Platform ensures entire CPU store data path is flushed to pmem on
	53	* system power loss.
	54	*/
	55	ND_REGION_PERSIST_CACHE = 1,
30e6d7bf DJ	56	/*
	57	* Platform provides mechanisms to automatically flush outstanding
	58	* write data from memory controler to pmem on system power loss.
	59	* (ADR)
	60	*/
	61	ND_REGION_PERSIST_MEMCTRL = 2,
004f1afb	62
c5d4355d PG	63	/* Platform provides asynchronous flush mechanism */
	64	ND_REGION_ASYNC = 3,
	65
1b40e09a DW	66	/* mark newly adjusted resources as requiring a label update */
1b40e09a DW	67	DPA_RESOURCE_ADJUSTED = 1 << 0,
e6dfb2de DW	68	};
e6dfb2de DW	69
b94d5230 DW	70	struct nvdimm;
	71	struct nvdimm_bus_descriptor;
	72	typedef int (ndctl_fn)(struct nvdimm_bus_descriptor nd_desc,
	73	struct nvdimm nvdimm, unsigned int cmd, void buf,
aef25338	74	unsigned int buf_len, int *cmd_rc);
b94d5230	75
1ff19f48	76	struct device_node;
b94d5230	77	struct nvdimm_bus_descriptor {
45def22c	78	const struct attribute_group **attr_groups;
e3654eca	79	unsigned long cmd_mask;
92fe2aa8 DW	80	unsigned long dimm_family_mask;
92fe2aa8 DW	81	unsigned long bus_family_mask;
bc9775d8	82	struct module *module;
b94d5230	83	char *provider_name;
1ff19f48	84	struct device_node *of_node;
b94d5230	85	ndctl_fn ndctl;
7ae0fa43	86	int (flush_probe)(struct nvdimm_bus_descriptor nd_desc);
87bf572e	87	int (clear_to_send)(struct nvdimm_bus_descriptor nd_desc,
b3ed2ce0	88	struct nvdimm nvdimm, unsigned int cmd, void data);
b94d5230 DW	89	};
b94d5230 DW	90
62232e45 DW	91	struct nd_cmd_desc {
	92	int in_num;
	93	int out_num;
	94	u32 in_sizes[ND_CMD_MAX_ELEM];
	95	int out_sizes[ND_CMD_MAX_ELEM];
	96	};
	97
eaf96153	98	struct nd_interleave_set {
c12c48ce DW	99	/* v1.1 definition of the interleave-set-cookie algorithm */
	100	u64 cookie1;
	101	/* v1.2 definition of the interleave-set-cookie algorithm */
	102	u64 cookie2;
86ef58a4 DW	103	/* compatibility with initial buggy Linux implementation */
86ef58a4 DW	104	u64 altcookie;
faec6f8a DW	105
faec6f8a DW	106	guid_t type_guid;
eaf96153 DW	107	};
eaf96153 DW	108
44c462eb DW	109	struct nd_mapping_desc {
	110	struct nvdimm *nvdimm;
	111	u64 start;
	112	u64 size;
401c0a19	113	int position;
44c462eb DW	114	};
44c462eb DW	115
c5d4355d	116	struct nd_region;
1f7df6f8 DW	117	struct nd_region_desc {
1f7df6f8 DW	118	struct resource *res;
44c462eb	119	struct nd_mapping_desc *mapping;
1f7df6f8 DW	120	u16 num_mappings;
1f7df6f8 DW	121	const struct attribute_group **attr_groups;
eaf96153	122	struct nd_interleave_set *nd_set;
1f7df6f8	123	void *provider_data;
5212e11f	124	int num_lanes;
41d7a6d6	125	int numa_node;
8fc5c735	126	int target_node;
004f1afb	127	unsigned long flags;
1ff19f48	128	struct device_node *of_node;
c5d4355d	129	int (flush)(struct nd_region nd_region, struct bio *bio);
1f7df6f8 DW	130	};
1f7df6f8 DW	131
29b9aa0a DW	132	struct device;
	133	void devm_nvdimm_memremap(struct device dev, resource_size_t offset,
	134	size_t size, unsigned long flags);
	135	static inline void __iomem devm_nvdimm_ioremap(struct device dev,
	136	resource_size_t offset, size_t size)
	137	{
	138	return (void __iomem *) devm_nvdimm_memremap(dev, offset, size, 0);
	139	}
	140
62232e45	141	struct nvdimm_bus;
3d88002e	142	struct module;
047fc8a1 RZ	143	struct device;
	144	struct nd_blk_region;
	145	struct nd_blk_region_desc {
	146	int (enable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
047fc8a1 RZ	147	int (do_io)(struct nd_blk_region ndbr, resource_size_t dpa,
	148	void *iobuf, u64 len, int rw);
	149	struct nd_region_desc ndr_desc;
	150	};
	151
	152	static inline struct nd_blk_region_desc *to_blk_region_desc(
	153	struct nd_region_desc *ndr_desc)
	154	{
	155	return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);
	156
	157	}
	158
d78c620a DW	159	/*
	160	* Note that separate bits for locked + unlocked are defined so that
	161	* 'flags == 0' corresponds to an error / not-supported state.
	162	*/
	163	enum nvdimm_security_bits {
f2989396 DJ	164	NVDIMM_SECURITY_DISABLED,
	165	NVDIMM_SECURITY_UNLOCKED,
	166	NVDIMM_SECURITY_LOCKED,
	167	NVDIMM_SECURITY_FROZEN,
	168	NVDIMM_SECURITY_OVERWRITE,
	169	};
	170
4c6926a2 DJ	171	#define NVDIMM_PASSPHRASE_LEN 32
	172	#define NVDIMM_KEY_DESC_LEN 22
	173
	174	struct nvdimm_key_data {
	175	u8 data[NVDIMM_PASSPHRASE_LEN];
	176	};
	177
89fa9d8e DJ	178	enum nvdimm_passphrase_type {
	179	NVDIMM_USER,
	180	NVDIMM_MASTER,
	181	};
	182
f2989396	183	struct nvdimm_security_ops {
d78c620a	184	unsigned long (get_flags)(struct nvdimm nvdimm,
89fa9d8e	185	enum nvdimm_passphrase_type pass_type);
37833fb7	186	int (freeze)(struct nvdimm nvdimm);
4c6926a2 DJ	187	int (change_key)(struct nvdimm nvdimm,
4c6926a2 DJ	188	const struct nvdimm_key_data *old_data,
89fa9d8e DJ	189	const struct nvdimm_key_data *new_data,
89fa9d8e DJ	190	enum nvdimm_passphrase_type pass_type);
4c6926a2 DJ	191	int (unlock)(struct nvdimm nvdimm,
4c6926a2 DJ	192	const struct nvdimm_key_data *key_data);
03b65b22 DJ	193	int (disable)(struct nvdimm nvdimm,
03b65b22 DJ	194	const struct nvdimm_key_data *key_data);
64e77c8c	195	int (erase)(struct nvdimm nvdimm,
89fa9d8e DJ	196	const struct nvdimm_key_data *key_data,
89fa9d8e DJ	197	enum nvdimm_passphrase_type pass_type);
7d988097 DJ	198	int (overwrite)(struct nvdimm nvdimm,
	199	const struct nvdimm_key_data *key_data);
	200	int (query_overwrite)(struct nvdimm nvdimm);
f2989396 DJ	201	};
f2989396 DJ	202
aa9ad44a DJ	203	void badrange_init(struct badrange *badrange);
	204	int badrange_add(struct badrange *badrange, u64 addr, u64 length);
	205	void badrange_forget(struct badrange *badrange, phys_addr_t start,
	206	unsigned int len);
	207	int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr,
	208	u64 length);
bc9775d8 DW	209	struct nvdimm_bus nvdimm_bus_register(struct device parent,
bc9775d8 DW	210	struct nvdimm_bus_descriptor *nfit_desc);
b94d5230	211	void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
45def22c	212	struct nvdimm_bus to_nvdimm_bus(struct device dev);
f2989396	213	struct nvdimm_bus nvdimm_to_bus(struct nvdimm nvdimm);
e6dfb2de	214	struct nvdimm to_nvdimm(struct device dev);
1f7df6f8	215	struct nd_region to_nd_region(struct device dev);
243f29fe	216	struct device nd_region_dev(struct nd_region nd_region);
047fc8a1	217	struct nd_blk_region to_nd_blk_region(struct device dev);
45def22c	218	struct nvdimm_bus_descriptor to_nd_desc(struct nvdimm_bus nvdimm_bus);
37b137ff	219	struct device to_nvdimm_bus_dev(struct nvdimm_bus nvdimm_bus);
e6dfb2de	220	const char nvdimm_name(struct nvdimm nvdimm);
ba9c8dd3	221	struct kobject nvdimm_kobj(struct nvdimm nvdimm);
e3654eca	222	unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
e6dfb2de	223	void nvdimm_provider_data(struct nvdimm nvdimm);
d6548ae4 DJ	224	struct nvdimm __nvdimm_create(struct nvdimm_bus nvdimm_bus,
	225	void provider_data, const struct attribute_group *groups,
	226	unsigned long flags, unsigned long cmd_mask, int num_flush,
f2989396 DJ	227	struct resource flush_wpq, const char dimm_id,
f2989396 DJ	228	const struct nvdimm_security_ops *sec_ops);
d6548ae4 DJ	229	static inline struct nvdimm nvdimm_create(struct nvdimm_bus nvdimm_bus,
	230	void provider_data, const struct attribute_group *groups,
	231	unsigned long flags, unsigned long cmd_mask, int num_flush,
	232	struct resource *flush_wpq)
	233	{
	234	return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
f2989396	235	cmd_mask, num_flush, flush_wpq, NULL, NULL);
d6548ae4 DJ	236	}
d6548ae4 DJ	237
62232e45 DW	238	const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
	239	const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
	240	u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
	241	const struct nd_cmd_desc desc, int idx, void buf);
	242	u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
	243	const struct nd_cmd_desc desc, int idx, const u32 in_field,
efda1b5d	244	const u32 *out_field, unsigned long remainder);
4d88a97a	245	int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
1f7df6f8 DW	246	struct nd_region nvdimm_pmem_region_create(struct nvdimm_bus nvdimm_bus,
	247	struct nd_region_desc *ndr_desc);
	248	struct nd_region nvdimm_blk_region_create(struct nvdimm_bus nvdimm_bus,
	249	struct nd_region_desc *ndr_desc);
	250	struct nd_region nvdimm_volatile_region_create(struct nvdimm_bus nvdimm_bus,
	251	struct nd_region_desc *ndr_desc);
047fc8a1 RZ	252	void nd_region_provider_data(struct nd_region nd_region);
	253	void nd_blk_region_provider_data(struct nd_blk_region ndbr);
	254	void nd_blk_region_set_provider_data(struct nd_blk_region ndbr, void data);
	255	struct nvdimm nd_blk_region_to_dimm(struct nd_blk_region ndbr);
ca6a4657	256	unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr);
047fc8a1 RZ	257	unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
047fc8a1 RZ	258	void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
eaf96153	259	u64 nd_fletcher64(void *addr, size_t len, bool le);
c5d4355d PG	260	int nvdimm_flush(struct nd_region nd_region, struct bio bio);
c5d4355d PG	261	int generic_nvdimm_flush(struct nd_region *nd_region);
f284a4f2	262	int nvdimm_has_flush(struct nd_region *nd_region);
0b277961	263	int nvdimm_has_cache(struct nd_region *nd_region);
7d988097	264	int nvdimm_in_overwrite(struct nvdimm *nvdimm);
fefc1d97	265	bool is_nvdimm_sync(struct nd_region *nd_region);
5deb67f7	266
f2989396 DJ	267	static inline int nvdimm_ctl(struct nvdimm nvdimm, unsigned int cmd, void buf,
	268	unsigned int buf_len, int *cmd_rc)
	269	{
	270	struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
	271	struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
	272
	273	return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
	274	}
	275
5deb67f7 RM	276	#ifdef CONFIG_ARCH_HAS_PMEM_API
	277	#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
	278	void arch_wb_cache_pmem(void *addr, size_t size);
	279	void arch_invalidate_pmem(void *addr, size_t size);
	280	#else
	281	#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
	282	static inline void arch_wb_cache_pmem(void *addr, size_t size)
	283	{
	284	}
	285	static inline void arch_invalidate_pmem(void *addr, size_t size)
	286	{
	287	}
	288	#endif
	289
b94d5230	290	#endif /* __LIBNVDIMM_H__ */