[linux-2.6-block.git] / include / linux / libnvdimm.h

/*
 * libnvdimm - Non-volatile-memory Devices Subsystem
 *
 * 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 __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>

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,

	/* 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,

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

extern struct attribute_group nvdimm_bus_attribute_group;
extern struct attribute_group nvdimm_attribute_group;
extern struct attribute_group nd_device_attribute_group;
extern struct attribute_group nd_numa_attribute_group;
extern struct attribute_group nd_region_attribute_group;
extern struct attribute_group nd_mapping_attribute_group;

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 bus_dsm_mask;
	unsigned long cmd_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_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;
	unsigned long flags;
	struct device_node *of_node;
};

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);

}

enum nvdimm_security_state {
	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];
};

struct nvdimm_security_ops {
	enum nvdimm_security_state (*state)(struct nvdimm *nvdimm);
	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);
	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);
};

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);
void 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);

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
b94d5230 DW	1	/*
	2	* libnvdimm - Non-volatile-memory Devices Subsystem
	3	*
	4	* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of version 2 of the GNU General Public License as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*/
	15	#ifndef __LIBNVDIMM_H__
	16	#define __LIBNVDIMM_H__
047fc8a1	17	#include <linux/kernel.h>
62232e45 DW	18	#include <linux/sizes.h>
62232e45 DW	19	#include <linux/types.h>
faec6f8a	20	#include <linux/uuid.h>
aa9ad44a DJ	21	#include <linux/spinlock.h>
	22
	23	struct badrange_entry {
	24	u64 start;
	25	u64 length;
	26	struct list_head list;
	27	};
	28
	29	struct badrange {
	30	struct list_head list;
	31	spinlock_t lock;
	32	};
e6dfb2de DW	33
	34	enum {
	35	/* when a dimm supports both PMEM and BLK access a label is required */
8f078b38	36	NDD_ALIASING = 0,
58138820	37	/* unarmed memory devices may not persist writes */
8f078b38 DW	38	NDD_UNARMED = 1,
	39	/* locked memory devices should not be accessed */
	40	NDD_LOCKED = 2,
62232e45 DW	41
	42	/* need to set a limit somewhere, but yes, this is likely overkill */
	43	ND_IOCTL_MAX_BUFLEN = SZ_4M,
4577b066	44	ND_CMD_MAX_ELEM = 5,
40abf9be	45	ND_CMD_MAX_ENVELOPE = 256,
1f7df6f8	46	ND_MAX_MAPPINGS = 32,
1b40e09a	47
004f1afb DW	48	/* region flag indicating to direct-map persistent memory by default */
004f1afb DW	49	ND_REGION_PAGEMAP = 0,
06e8ccda DJ	50	/*
	51	* Platform ensures entire CPU store data path is flushed to pmem on
	52	* system power loss.
	53	*/
	54	ND_REGION_PERSIST_CACHE = 1,
30e6d7bf DJ	55	/*
	56	* Platform provides mechanisms to automatically flush outstanding
	57	* write data from memory controler to pmem on system power loss.
	58	* (ADR)
	59	*/
	60	ND_REGION_PERSIST_MEMCTRL = 2,
004f1afb	61
1b40e09a DW	62	/* mark newly adjusted resources as requiring a label update */
1b40e09a DW	63	DPA_RESOURCE_ADJUSTED = 1 << 0,
e6dfb2de DW	64	};
e6dfb2de DW	65
45def22c	66	extern struct attribute_group nvdimm_bus_attribute_group;
62232e45	67	extern struct attribute_group nvdimm_attribute_group;
4d88a97a	68	extern struct attribute_group nd_device_attribute_group;
74ae66c3	69	extern struct attribute_group nd_numa_attribute_group;
1f7df6f8 DW	70	extern struct attribute_group nd_region_attribute_group;
1f7df6f8 DW	71	extern struct attribute_group nd_mapping_attribute_group;
45def22c	72
b94d5230 DW	73	struct nvdimm;
	74	struct nvdimm_bus_descriptor;
	75	typedef int (ndctl_fn)(struct nvdimm_bus_descriptor nd_desc,
	76	struct nvdimm nvdimm, unsigned int cmd, void buf,
aef25338	77	unsigned int buf_len, int *cmd_rc);
b94d5230	78
1ff19f48	79	struct device_node;
b94d5230	80	struct nvdimm_bus_descriptor {
45def22c	81	const struct attribute_group **attr_groups;
7db5bb33	82	unsigned long bus_dsm_mask;
e3654eca	83	unsigned long cmd_mask;
bc9775d8	84	struct module *module;
b94d5230	85	char *provider_name;
1ff19f48	86	struct device_node *of_node;
b94d5230	87	ndctl_fn ndctl;
7ae0fa43	88	int (flush_probe)(struct nvdimm_bus_descriptor nd_desc);
87bf572e	89	int (clear_to_send)(struct nvdimm_bus_descriptor nd_desc,
b3ed2ce0	90	struct nvdimm nvdimm, unsigned int cmd, void data);
b94d5230 DW	91	};
b94d5230 DW	92
62232e45 DW	93	struct nd_cmd_desc {
	94	int in_num;
	95	int out_num;
	96	u32 in_sizes[ND_CMD_MAX_ELEM];
	97	int out_sizes[ND_CMD_MAX_ELEM];
	98	};
	99
eaf96153	100	struct nd_interleave_set {
c12c48ce DW	101	/* v1.1 definition of the interleave-set-cookie algorithm */
	102	u64 cookie1;
	103	/* v1.2 definition of the interleave-set-cookie algorithm */
	104	u64 cookie2;
86ef58a4 DW	105	/* compatibility with initial buggy Linux implementation */
86ef58a4 DW	106	u64 altcookie;
faec6f8a DW	107
faec6f8a DW	108	guid_t type_guid;
eaf96153 DW	109	};
eaf96153 DW	110
44c462eb DW	111	struct nd_mapping_desc {
	112	struct nvdimm *nvdimm;
	113	u64 start;
	114	u64 size;
401c0a19	115	int position;
44c462eb DW	116	};
44c462eb DW	117
1f7df6f8 DW	118	struct nd_region_desc {
1f7df6f8 DW	119	struct resource *res;
44c462eb	120	struct nd_mapping_desc *mapping;
1f7df6f8 DW	121	u16 num_mappings;
1f7df6f8 DW	122	const struct attribute_group **attr_groups;
eaf96153	123	struct nd_interleave_set *nd_set;
1f7df6f8	124	void *provider_data;
5212e11f	125	int num_lanes;
41d7a6d6	126	int numa_node;
004f1afb	127	unsigned long flags;
1ff19f48	128	struct device_node *of_node;
1f7df6f8 DW	129	};
1f7df6f8 DW	130
29b9aa0a DW	131	struct device;
	132	void devm_nvdimm_memremap(struct device dev, resource_size_t offset,
	133	size_t size, unsigned long flags);
	134	static inline void __iomem devm_nvdimm_ioremap(struct device dev,
	135	resource_size_t offset, size_t size)
	136	{
	137	return (void __iomem *) devm_nvdimm_memremap(dev, offset, size, 0);
	138	}
	139
62232e45	140	struct nvdimm_bus;
3d88002e	141	struct module;
047fc8a1 RZ	142	struct device;
	143	struct nd_blk_region;
	144	struct nd_blk_region_desc {
	145	int (enable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
047fc8a1 RZ	146	int (do_io)(struct nd_blk_region ndbr, resource_size_t dpa,
	147	void *iobuf, u64 len, int rw);
	148	struct nd_region_desc ndr_desc;
	149	};
	150
	151	static inline struct nd_blk_region_desc *to_blk_region_desc(
	152	struct nd_region_desc *ndr_desc)
	153	{
	154	return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);
	155
	156	}
	157
f2989396 DJ	158	enum nvdimm_security_state {
	159	NVDIMM_SECURITY_DISABLED,
	160	NVDIMM_SECURITY_UNLOCKED,
	161	NVDIMM_SECURITY_LOCKED,
	162	NVDIMM_SECURITY_FROZEN,
	163	NVDIMM_SECURITY_OVERWRITE,
	164	};
	165
4c6926a2 DJ	166	#define NVDIMM_PASSPHRASE_LEN 32
	167	#define NVDIMM_KEY_DESC_LEN 22
	168
	169	struct nvdimm_key_data {
	170	u8 data[NVDIMM_PASSPHRASE_LEN];
	171	};
	172
f2989396 DJ	173	struct nvdimm_security_ops {
f2989396 DJ	174	enum nvdimm_security_state (state)(struct nvdimm nvdimm);
37833fb7	175	int (freeze)(struct nvdimm nvdimm);
4c6926a2 DJ	176	int (change_key)(struct nvdimm nvdimm,
	177	const struct nvdimm_key_data *old_data,
	178	const struct nvdimm_key_data *new_data);
	179	int (unlock)(struct nvdimm nvdimm,
	180	const struct nvdimm_key_data *key_data);
03b65b22 DJ	181	int (disable)(struct nvdimm nvdimm,
03b65b22 DJ	182	const struct nvdimm_key_data *key_data);
64e77c8c DJ	183	int (erase)(struct nvdimm nvdimm,
64e77c8c DJ	184	const struct nvdimm_key_data *key_data);
f2989396 DJ	185	};
f2989396 DJ	186
aa9ad44a DJ	187	void badrange_init(struct badrange *badrange);
	188	int badrange_add(struct badrange *badrange, u64 addr, u64 length);
	189	void badrange_forget(struct badrange *badrange, phys_addr_t start,
	190	unsigned int len);
	191	int nvdimm_bus_add_badrange(struct nvdimm_bus *nvdimm_bus, u64 addr,
	192	u64 length);
bc9775d8 DW	193	struct nvdimm_bus nvdimm_bus_register(struct device parent,
bc9775d8 DW	194	struct nvdimm_bus_descriptor *nfit_desc);
b94d5230	195	void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
45def22c	196	struct nvdimm_bus to_nvdimm_bus(struct device dev);
f2989396	197	struct nvdimm_bus nvdimm_to_bus(struct nvdimm nvdimm);
e6dfb2de	198	struct nvdimm to_nvdimm(struct device dev);
1f7df6f8	199	struct nd_region to_nd_region(struct device dev);
243f29fe	200	struct device nd_region_dev(struct nd_region nd_region);
047fc8a1	201	struct nd_blk_region to_nd_blk_region(struct device dev);
45def22c	202	struct nvdimm_bus_descriptor to_nd_desc(struct nvdimm_bus nvdimm_bus);
37b137ff	203	struct device to_nvdimm_bus_dev(struct nvdimm_bus nvdimm_bus);
e6dfb2de	204	const char nvdimm_name(struct nvdimm nvdimm);
ba9c8dd3	205	struct kobject nvdimm_kobj(struct nvdimm nvdimm);
e3654eca	206	unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
e6dfb2de	207	void nvdimm_provider_data(struct nvdimm nvdimm);
d6548ae4 DJ	208	struct nvdimm __nvdimm_create(struct nvdimm_bus nvdimm_bus,
	209	void provider_data, const struct attribute_group *groups,
	210	unsigned long flags, unsigned long cmd_mask, int num_flush,
f2989396 DJ	211	struct resource flush_wpq, const char dimm_id,
f2989396 DJ	212	const struct nvdimm_security_ops *sec_ops);
d6548ae4 DJ	213	static inline struct nvdimm nvdimm_create(struct nvdimm_bus nvdimm_bus,
	214	void provider_data, const struct attribute_group *groups,
	215	unsigned long flags, unsigned long cmd_mask, int num_flush,
	216	struct resource *flush_wpq)
	217	{
	218	return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
f2989396	219	cmd_mask, num_flush, flush_wpq, NULL, NULL);
d6548ae4 DJ	220	}
d6548ae4 DJ	221
62232e45 DW	222	const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
	223	const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
	224	u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
	225	const struct nd_cmd_desc desc, int idx, void buf);
	226	u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
	227	const struct nd_cmd_desc desc, int idx, const u32 in_field,
efda1b5d	228	const u32 *out_field, unsigned long remainder);
4d88a97a	229	int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
1f7df6f8 DW	230	struct nd_region nvdimm_pmem_region_create(struct nvdimm_bus nvdimm_bus,
	231	struct nd_region_desc *ndr_desc);
	232	struct nd_region nvdimm_blk_region_create(struct nvdimm_bus nvdimm_bus,
	233	struct nd_region_desc *ndr_desc);
	234	struct nd_region nvdimm_volatile_region_create(struct nvdimm_bus nvdimm_bus,
	235	struct nd_region_desc *ndr_desc);
047fc8a1 RZ	236	void nd_region_provider_data(struct nd_region nd_region);
	237	void nd_blk_region_provider_data(struct nd_blk_region ndbr);
	238	void nd_blk_region_set_provider_data(struct nd_blk_region ndbr, void data);
	239	struct nvdimm nd_blk_region_to_dimm(struct nd_blk_region ndbr);
ca6a4657	240	unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr);
047fc8a1 RZ	241	unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
047fc8a1 RZ	242	void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
eaf96153	243	u64 nd_fletcher64(void *addr, size_t len, bool le);
f284a4f2 DW	244	void nvdimm_flush(struct nd_region *nd_region);
f284a4f2 DW	245	int nvdimm_has_flush(struct nd_region *nd_region);
0b277961	246	int nvdimm_has_cache(struct nd_region *nd_region);
5deb67f7	247
f2989396 DJ	248	static inline int nvdimm_ctl(struct nvdimm nvdimm, unsigned int cmd, void buf,
	249	unsigned int buf_len, int *cmd_rc)
	250	{
	251	struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
	252	struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
	253
	254	return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
	255	}
	256
5deb67f7 RM	257	#ifdef CONFIG_ARCH_HAS_PMEM_API
	258	#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
	259	void arch_wb_cache_pmem(void *addr, size_t size);
	260	void arch_invalidate_pmem(void *addr, size_t size);
	261	#else
	262	#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
	263	static inline void arch_wb_cache_pmem(void *addr, size_t size)
	264	{
	265	}
	266	static inline void arch_invalidate_pmem(void *addr, size_t size)
	267	{
	268	}
	269	#endif
	270
b94d5230	271	#endif /* __LIBNVDIMM_H__ */