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/* 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/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;
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,
unsigned long *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__ */
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