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/memremap.h> 7 #include <linux/types.h> 8 #include <linux/pfn_t.h> 9 #include <linux/fs.h> 10 11 enum dax_access_mode; 12 13 /* this definition is in it's own header for tools/testing/nvdimm to consume */ 14 struct pmem_device { 15 /* One contiguous memory region per device */ 16 phys_addr_t phys_addr; 17 /* when non-zero this device is hosting a 'pfn' instance */ 18 phys_addr_t data_offset; 19 u64 pfn_flags; 20 void *virt_addr; 21 /* immutable base size of the namespace */ 22 size_t size; 23 /* trim size when namespace capacity has been section aligned */ 24 u32 pfn_pad; 25 struct kernfs_node *bb_state; 26 struct badblocks bb; 27 struct dax_device *dax_dev; 28 struct gendisk *disk; 29 struct dev_pagemap pgmap; 30 }; 31 32 long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, 33 long nr_pages, enum dax_access_mode mode, void **kaddr, 34 pfn_t *pfn); 35 36 #ifdef CONFIG_MEMORY_FAILURE 37 static inline bool test_and_clear_pmem_poison(struct page *page) 38 { 39 return TestClearPageHWPoison(page); 40 } 41 #else 42 static inline bool test_and_clear_pmem_poison(struct page *page) 43 { 44 return false; 45 } 46 #endif 47 #endif /* __NVDIMM_PMEM_H__ */ 48