[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/types.h>
#include <linux/pfn_t.h>
#include <linux/fs.h>

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