LXR linux/drivers/nvdimm/pmem.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __NVDIMM_PMEM_H__
   3#define __NVDIMM_PMEM_H__
   4#include <linux/page-flags.h>
   5#include <linux/badblocks.h>
   6#include <linux/types.h>
   7#include <linux/pfn_t.h>
   8#include <linux/fs.h>
   9
  10/* this definition is in it's own header for tools/testing/nvdimm to consume */
  11struct 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;
  17        void                    *virt_addr;
  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;
  22        struct kernfs_node      *bb_state;
  23        struct badblocks        bb;
  24        struct dax_device       *dax_dev;
  25        struct gendisk          *disk;
  26        struct dev_pagemap      pgmap;
  27};
  28
  29long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
  30                long nr_pages, void **kaddr, pfn_t *pfn);
  31
  32#ifdef CONFIG_MEMORY_FAILURE
  33static inline bool test_and_clear_pmem_poison(struct page *page)
  34{
  35        return TestClearPageHWPoison(page);
  36}
  37#else
  38static inline bool test_and_clear_pmem_poison(struct page *page)
  39{
  40        return false;
  41}
  42#endif
  43#endif /* __NVDIMM_PMEM_H__ */
  44