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-rw-r--r--drivers/nvdimm/pmem.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h
new file mode 100644
index 0000000000..392b0b38ac
--- /dev/null
+++ b/drivers/nvdimm/pmem.h
@@ -0,0 +1,47 @@
+/* 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__ */