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__ */ 31