drivers/nvdimm/pmem.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NVDIMM_PMEM_H__
   3 #define __NVDIMM_PMEM_H__
   4 #include <linux/badblocks.h>
   5 #include <linux/types.h>
   6 #include <linux/pfn_t.h>
   7 #include <linux/fs.h>
   8
   9 /* this definition is in it's own header for tools/testing/nvdimm to consume */
  10 struct pmem_device {
  11         /* One contiguous memory region per device */
  12         phys_addr_t             phys_addr;
  13         /* when non-zero this device is hosting a 'pfn' instance */
  14         phys_addr_t             data_offset;
  15         u64                     pfn_flags;
  16         void                    *virt_addr;
  17         /* immutable base size of the namespace */
  18         size_t                  size;
  19         /* trim size when namespace capacity has been section aligned */
  20         u32                     pfn_pad;
  21         struct kernfs_node      *bb_state;
  22         struct badblocks        bb;
  23         struct dax_device       *dax_dev;
  24         struct gendisk          *disk;
  25         struct dev_pagemap      pgmap;
  26 };
  27
  28 long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
  29                 long nr_pages, void **kaddr, pfn_t *pfn);
  30 #endif /* __NVDIMM_PMEM_H__ */