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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f295e53b DW |
2 | #ifndef __NVDIMM_PMEM_H__ |
3 | #define __NVDIMM_PMEM_H__ | |
c953cc98 | 4 | #include <linux/page-flags.h> |
f295e53b DW |
5 | #include <linux/badblocks.h> |
6 | #include <linux/types.h> | |
7 | #include <linux/pfn_t.h> | |
8 | #include <linux/fs.h> | |
9 | ||
f295e53b DW |
10 | /* this definition is in it's own header for tools/testing/nvdimm to consume */ |
11 | struct pmem_device { | |
12 | /* One contiguous memory region per device */ | |
13 | phys_addr_t phys_addr; | |
14 | /* when non-zero this device is hosting a 'pfn' instance */ | |
15 | phys_addr_t data_offset; | |
16 | u64 pfn_flags; | |
7a9eb206 | 17 | void *virt_addr; |
f295e53b DW |
18 | /* immutable base size of the namespace */ |
19 | size_t size; | |
20 | /* trim size when namespace capacity has been section aligned */ | |
21 | u32 pfn_pad; | |
975750a9 | 22 | struct kernfs_node *bb_state; |
f295e53b | 23 | struct badblocks bb; |
c1d6e828 DW |
24 | struct dax_device *dax_dev; |
25 | struct gendisk *disk; | |
e8d51348 | 26 | struct dev_pagemap pgmap; |
f295e53b | 27 | }; |
c1d6e828 DW |
28 | |
29 | long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, | |
30 | long nr_pages, void **kaddr, pfn_t *pfn); | |
c953cc98 DW |
31 | |
32 | #ifdef CONFIG_MEMORY_FAILURE | |
33 | static inline bool test_and_clear_pmem_poison(struct page *page) | |
34 | { | |
35 | return TestClearPageHWPoison(page); | |
36 | } | |
37 | #else | |
38 | static inline bool test_and_clear_pmem_poison(struct page *page) | |
39 | { | |
40 | return false; | |
41 | } | |
42 | #endif | |
f295e53b | 43 | #endif /* __NVDIMM_PMEM_H__ */ |