linux-imx

/* 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__ */