diff options
Diffstat (limited to 'drivers/nvdimm/pmem.h')
| -rw-r--r-- | drivers/nvdimm/pmem.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h new file mode 100644 index 000000000..59cfe13ea --- /dev/null +++ b/drivers/nvdimm/pmem.h @@ -0,0 +1,43 @@ +/* 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/types.h> +#include <linux/pfn_t.h> +#include <linux/fs.h> + +/* 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, 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__ */ |