1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __NVDIMM_PMEM_H__ 3*4882a593Smuzhiyun #define __NVDIMM_PMEM_H__ 4*4882a593Smuzhiyun #include <linux/page-flags.h> 5*4882a593Smuzhiyun #include <linux/badblocks.h> 6*4882a593Smuzhiyun #include <linux/types.h> 7*4882a593Smuzhiyun #include <linux/pfn_t.h> 8*4882a593Smuzhiyun #include <linux/fs.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* this definition is in it's own header for tools/testing/nvdimm to consume */ 11*4882a593Smuzhiyun struct pmem_device { 12*4882a593Smuzhiyun /* One contiguous memory region per device */ 13*4882a593Smuzhiyun phys_addr_t phys_addr; 14*4882a593Smuzhiyun /* when non-zero this device is hosting a 'pfn' instance */ 15*4882a593Smuzhiyun phys_addr_t data_offset; 16*4882a593Smuzhiyun u64 pfn_flags; 17*4882a593Smuzhiyun void *virt_addr; 18*4882a593Smuzhiyun /* immutable base size of the namespace */ 19*4882a593Smuzhiyun size_t size; 20*4882a593Smuzhiyun /* trim size when namespace capacity has been section aligned */ 21*4882a593Smuzhiyun u32 pfn_pad; 22*4882a593Smuzhiyun struct kernfs_node *bb_state; 23*4882a593Smuzhiyun struct badblocks bb; 24*4882a593Smuzhiyun struct dax_device *dax_dev; 25*4882a593Smuzhiyun struct gendisk *disk; 26*4882a593Smuzhiyun struct dev_pagemap pgmap; 27*4882a593Smuzhiyun }; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, 30*4882a593Smuzhiyun long nr_pages, void **kaddr, pfn_t *pfn); 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #ifdef CONFIG_MEMORY_FAILURE test_and_clear_pmem_poison(struct page * page)33*4882a593Smuzhiyunstatic inline bool test_and_clear_pmem_poison(struct page *page) 34*4882a593Smuzhiyun { 35*4882a593Smuzhiyun return TestClearPageHWPoison(page); 36*4882a593Smuzhiyun } 37*4882a593Smuzhiyun #else test_and_clear_pmem_poison(struct page * page)38*4882a593Smuzhiyunstatic inline bool test_and_clear_pmem_poison(struct page *page) 39*4882a593Smuzhiyun { 40*4882a593Smuzhiyun return false; 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun #endif 43*4882a593Smuzhiyun #endif /* __NVDIMM_PMEM_H__ */ 44