mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-01 08:04:22 +08:00
e511c4a3d2
Up till now, dax_direct_access() is used implicitly for normal
access, but for the purpose of recovery write, dax range with
poison is requested. To make the interface clear, introduce
enum dax_access_mode {
DAX_ACCESS,
DAX_RECOVERY_WRITE,
}
where DAX_ACCESS is used for normal dax access, and
DAX_RECOVERY_WRITE is used for dax recovery write.
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com>
Link: https://lore.kernel.org/r/165247982851.52965.11024212198889762949.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __NVDIMM_PMEM_H__
|
|
#define __NVDIMM_PMEM_H__
|
|
#include <linux/page-flags.h>
|
|
#include <linux/badblocks.h>
|
|
#include <linux/memremap.h>
|
|
#include <linux/types.h>
|
|
#include <linux/pfn_t.h>
|
|
#include <linux/fs.h>
|
|
|
|
enum dax_access_mode;
|
|
|
|
/* this definition is in it's own header for tools/testing/nvdimm to consume */
|
|
struct pmem_device {
|
|
/* One contiguous memory region per device */
|
|
phys_addr_t phys_addr;
|
|
/* when non-zero this device is hosting a 'pfn' instance */
|
|
phys_addr_t data_offset;
|
|
u64 pfn_flags;
|
|
void *virt_addr;
|
|
/* immutable base size of the namespace */
|
|
size_t size;
|
|
/* trim size when namespace capacity has been section aligned */
|
|
u32 pfn_pad;
|
|
struct kernfs_node *bb_state;
|
|
struct badblocks bb;
|
|
struct dax_device *dax_dev;
|
|
struct gendisk *disk;
|
|
struct dev_pagemap pgmap;
|
|
};
|
|
|
|
long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
|
|
long nr_pages, enum dax_access_mode mode, void **kaddr,
|
|
pfn_t *pfn);
|
|
|
|
#ifdef CONFIG_MEMORY_FAILURE
|
|
static inline bool test_and_clear_pmem_poison(struct page *page)
|
|
{
|
|
return TestClearPageHWPoison(page);
|
|
}
|
|
#else
|
|
static inline bool test_and_clear_pmem_poison(struct page *page)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
#endif /* __NVDIMM_PMEM_H__ */
|