[deliverable/linux.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>

enum {
	/* when a dimm supports both PMEM and BLK access a label is required */
	NDD_ALIASING = 1 << 0,
	/* unarmed memory devices may not persist writes */
	NDD_UNARMED = 1 << 1,

	/* need to set a limit somewhere, but yes, this is likely overkill */
	ND_IOCTL_MAX_BUFLEN = SZ_4M,
	ND_CMD_MAX_ELEM = 4,
	ND_CMD_MAX_ENVELOPE = 16,
	ND_CMD_ARS_STATUS_MAX = SZ_4K,
	ND_MAX_MAPPINGS = 32,

	/* region flag indicating to direct-map persistent memory by default */
	ND_REGION_PAGEMAP = 0,

	/* 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);

struct nd_namespace_label;
struct nvdimm_drvdata;
struct nd_mapping {
	struct nvdimm *nvdimm;
	struct nd_namespace_label **labels;
	u64 start;
	u64 size;
	/*
	 * @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 nvdimm_bus_descriptor {
	const struct attribute_group **attr_groups;
	unsigned long dsm_mask;
	char *provider_name;
	ndctl_fn ndctl;
};

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 {
	u64 cookie;
};

struct nd_region_desc {
	struct resource *res;
	struct nd_mapping *nd_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 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);
	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);
	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);

}

int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length);
struct nvdimm_bus *__nvdimm_bus_register(struct device *parent,
		struct nvdimm_bus_descriptor *nfit_desc, struct module *module);
#define nvdimm_bus_register(parent, desc) \
	__nvdimm_bus_register(parent, desc, THIS_MODULE)
void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
struct nvdimm *to_nvdimm(struct device *dev);
struct nd_region *to_nd_region(struct device *dev);
struct nd_blk_region *to_nd_blk_region(struct device *dev);
struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
const char *nvdimm_name(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 *dsm_mask);
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);
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 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);
#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>
e6dfb2de DW	20
	21	enum {
	22	/* when a dimm supports both PMEM and BLK access a label is required */
	23	NDD_ALIASING = 1 << 0,
58138820 DW	24	/* unarmed memory devices may not persist writes */
58138820 DW	25	NDD_UNARMED = 1 << 1,
62232e45 DW	26
	27	/* need to set a limit somewhere, but yes, this is likely overkill */
	28	ND_IOCTL_MAX_BUFLEN = SZ_4M,
	29	ND_CMD_MAX_ELEM = 4,
	30	ND_CMD_MAX_ENVELOPE = 16,
	31	ND_CMD_ARS_STATUS_MAX = SZ_4K,
1f7df6f8	32	ND_MAX_MAPPINGS = 32,
1b40e09a	33
004f1afb DW	34	/* region flag indicating to direct-map persistent memory by default */
	35	ND_REGION_PAGEMAP = 0,
	36
1b40e09a DW	37	/* mark newly adjusted resources as requiring a label update */
1b40e09a DW	38	DPA_RESOURCE_ADJUSTED = 1 << 0,
e6dfb2de DW	39	};
e6dfb2de DW	40
45def22c	41	extern struct attribute_group nvdimm_bus_attribute_group;
62232e45	42	extern struct attribute_group nvdimm_attribute_group;
4d88a97a	43	extern struct attribute_group nd_device_attribute_group;
74ae66c3	44	extern struct attribute_group nd_numa_attribute_group;
1f7df6f8 DW	45	extern struct attribute_group nd_region_attribute_group;
1f7df6f8 DW	46	extern struct attribute_group nd_mapping_attribute_group;
45def22c	47
b94d5230 DW	48	struct nvdimm;
	49	struct nvdimm_bus_descriptor;
	50	typedef int (ndctl_fn)(struct nvdimm_bus_descriptor nd_desc,
	51	struct nvdimm nvdimm, unsigned int cmd, void buf,
	52	unsigned int buf_len);
	53
bf9bccc1 DW	54	struct nd_namespace_label;
bf9bccc1 DW	55	struct nvdimm_drvdata;
1f7df6f8 DW	56	struct nd_mapping {
1f7df6f8 DW	57	struct nvdimm *nvdimm;
bf9bccc1	58	struct nd_namespace_label **labels;
1f7df6f8 DW	59	u64 start;
1f7df6f8 DW	60	u64 size;
bf9bccc1 DW	61	/*
	62	* @ndd is for private use at region enable / disable time for
	63	* get_ndd() + put_ndd(), all other nd_mapping to ndd
	64	* conversions use to_ndd() which respects enabled state of the
	65	* nvdimm.
	66	*/
	67	struct nvdimm_drvdata *ndd;
1f7df6f8 DW	68	};
1f7df6f8 DW	69
b94d5230	70	struct nvdimm_bus_descriptor {
45def22c	71	const struct attribute_group **attr_groups;
b94d5230 DW	72	unsigned long dsm_mask;
	73	char *provider_name;
	74	ndctl_fn ndctl;
	75	};
	76
62232e45 DW	77	struct nd_cmd_desc {
	78	int in_num;
	79	int out_num;
	80	u32 in_sizes[ND_CMD_MAX_ELEM];
	81	int out_sizes[ND_CMD_MAX_ELEM];
	82	};
	83
eaf96153 DW	84	struct nd_interleave_set {
	85	u64 cookie;
	86	};
	87
1f7df6f8 DW	88	struct nd_region_desc {
	89	struct resource *res;
	90	struct nd_mapping *nd_mapping;
	91	u16 num_mappings;
	92	const struct attribute_group **attr_groups;
eaf96153	93	struct nd_interleave_set *nd_set;
1f7df6f8	94	void *provider_data;
5212e11f	95	int num_lanes;
41d7a6d6	96	int numa_node;
004f1afb	97	unsigned long flags;
1f7df6f8 DW	98	};
1f7df6f8 DW	99
62232e45	100	struct nvdimm_bus;
3d88002e	101	struct module;
047fc8a1 RZ	102	struct device;
	103	struct nd_blk_region;
	104	struct nd_blk_region_desc {
	105	int (enable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
	106	void (disable)(struct nvdimm_bus nvdimm_bus, struct device *dev);
	107	int (do_io)(struct nd_blk_region ndbr, resource_size_t dpa,
	108	void *iobuf, u64 len, int rw);
	109	struct nd_region_desc ndr_desc;
	110	};
	111
	112	static inline struct nd_blk_region_desc *to_blk_region_desc(
	113	struct nd_region_desc *ndr_desc)
	114	{
	115	return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc);
	116
	117	}
	118
0caeef63	119	int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length);
3d88002e DW	120	struct nvdimm_bus __nvdimm_bus_register(struct device parent,
	121	struct nvdimm_bus_descriptor nfit_desc, struct module module);
	122	#define nvdimm_bus_register(parent, desc) \
	123	__nvdimm_bus_register(parent, desc, THIS_MODULE)
b94d5230	124	void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
45def22c	125	struct nvdimm_bus to_nvdimm_bus(struct device dev);
e6dfb2de	126	struct nvdimm to_nvdimm(struct device dev);
1f7df6f8	127	struct nd_region to_nd_region(struct device dev);
047fc8a1	128	struct nd_blk_region to_nd_blk_region(struct device dev);
45def22c	129	struct nvdimm_bus_descriptor to_nd_desc(struct nvdimm_bus nvdimm_bus);
e6dfb2de DW	130	const char nvdimm_name(struct nvdimm nvdimm);
	131	void nvdimm_provider_data(struct nvdimm nvdimm);
	132	struct nvdimm nvdimm_create(struct nvdimm_bus nvdimm_bus, void *provider_data,
62232e45 DW	133	const struct attribute_group **groups, unsigned long flags,
	134	unsigned long *dsm_mask);
	135	const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
	136	const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
	137	u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
	138	const struct nd_cmd_desc desc, int idx, void buf);
	139	u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
	140	const struct nd_cmd_desc desc, int idx, const u32 in_field,
	141	const u32 *out_field);
4d88a97a	142	int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
1f7df6f8 DW	143	struct nd_region nvdimm_pmem_region_create(struct nvdimm_bus nvdimm_bus,
	144	struct nd_region_desc *ndr_desc);
	145	struct nd_region nvdimm_blk_region_create(struct nvdimm_bus nvdimm_bus,
	146	struct nd_region_desc *ndr_desc);
	147	struct nd_region nvdimm_volatile_region_create(struct nvdimm_bus nvdimm_bus,
	148	struct nd_region_desc *ndr_desc);
047fc8a1 RZ	149	void nd_region_provider_data(struct nd_region nd_region);
	150	void nd_blk_region_provider_data(struct nd_blk_region ndbr);
	151	void nd_blk_region_set_provider_data(struct nd_blk_region ndbr, void data);
	152	struct nvdimm nd_blk_region_to_dimm(struct nd_blk_region ndbr);
	153	unsigned int nd_region_acquire_lane(struct nd_region *nd_region);
	154	void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane);
eaf96153	155	u64 nd_fletcher64(void *addr, size_t len, bool le);
b94d5230	156	#endif /* __LIBNVDIMM_H__ */