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Release 4.12 include/linux/libnvdimm.h

Directory: include/linux
/*
 * 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 = 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,

	/* 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 nvdimm_bus_descriptor {
	
const struct attribute_group **attr_groups;
	
unsigned long cmd_mask;
	
struct module *module;
	
char *provider_name;
	
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);
};


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;
	/* compatibility with initial buggy Linux implementation */
	
u64 altcookie;
};


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


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;
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);
}


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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);

}


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int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length);
void nvdimm_forget_poison(struct nvdimm_bus *nvdimm_bus,
		phys_addr_t start, unsigned int len);
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 *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);
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 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 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);
#endif /* __LIBNVDIMM_H__ */

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Vishal Verma303.41%411.76%


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Toshi Kani80.91%25.88%


Jerry Hoemann10.11%12.94%


Total881100.00%34100.00%


Directory: include/linux



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