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