| 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 |