[linux-2.6-block.git] / drivers / nvdimm / pmem.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NVDIMM_PMEM_H__
#define __NVDIMM_PMEM_H__
#include <linux/page-flags.h>
#include <linux/badblocks.h>
#include <linux/memremap.h>
#include <linux/types.h>
#include <linux/pfn_t.h>
#include <linux/fs.h>

enum dax_access_mode;

/* this definition is in it's own header for tools/testing/nvdimm to consume */
struct pmem_device {
	/* One contiguous memory region per device */
	phys_addr_t		phys_addr;
	/* when non-zero this device is hosting a 'pfn' instance */
	phys_addr_t		data_offset;
	u64			pfn_flags;
	void			*virt_addr;
	/* immutable base size of the namespace */
	size_t			size;
	/* trim size when namespace capacity has been section aligned */
	u32			pfn_pad;
	struct kernfs_node	*bb_state;
	struct badblocks	bb;
	struct dax_device	*dax_dev;
	struct gendisk		*disk;
	struct dev_pagemap	pgmap;
};

long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
		long nr_pages, enum dax_access_mode mode, void **kaddr,
		pfn_t *pfn);

#ifdef CONFIG_MEMORY_FAILURE
static inline bool test_and_clear_pmem_poison(struct page *page)
{
	return TestClearPageHWPoison(page);
}
#else
static inline bool test_and_clear_pmem_poison(struct page *page)
{
	return false;
}
#endif
#endif /* __NVDIMM_PMEM_H__ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
f295e53b DW	2	#ifndef __NVDIMM_PMEM_H__
f295e53b DW	3	#define __NVDIMM_PMEM_H__
c953cc98	4	#include <linux/page-flags.h>
f295e53b	5	#include <linux/badblocks.h>
dc90f084	6	#include <linux/memremap.h>
f295e53b DW	7	#include <linux/types.h>
	8	#include <linux/pfn_t.h>
	9	#include <linux/fs.h>
	10
e511c4a3 JC	11	enum dax_access_mode;
e511c4a3 JC	12
f295e53b DW	13	/* this definition is in it's own header for tools/testing/nvdimm to consume */
	14	struct pmem_device {
	15	/* One contiguous memory region per device */
	16	phys_addr_t phys_addr;
	17	/* when non-zero this device is hosting a 'pfn' instance */
	18	phys_addr_t data_offset;
	19	u64 pfn_flags;
7a9eb206	20	void *virt_addr;
f295e53b DW	21	/* immutable base size of the namespace */
	22	size_t size;
	23	/* trim size when namespace capacity has been section aligned */
	24	u32 pfn_pad;
975750a9	25	struct kernfs_node *bb_state;
f295e53b	26	struct badblocks bb;
c1d6e828 DW	27	struct dax_device *dax_dev;
c1d6e828 DW	28	struct gendisk *disk;
e8d51348	29	struct dev_pagemap pgmap;
f295e53b	30	};
c1d6e828 DW	31
c1d6e828 DW	32	long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
e511c4a3 JC	33	long nr_pages, enum dax_access_mode mode, void **kaddr,
e511c4a3 JC	34	pfn_t *pfn);
c953cc98 DW	35
	36	#ifdef CONFIG_MEMORY_FAILURE
	37	static inline bool test_and_clear_pmem_poison(struct page *page)
	38	{
	39	return TestClearPageHWPoison(page);
	40	}
	41	#else
	42	static inline bool test_and_clear_pmem_poison(struct page *page)
	43	{
	44	return false;
	45	}
	46	#endif
f295e53b	47	#endif /* __NVDIMM_PMEM_H__ */