[mirror_ubuntu-artful-kernel.git] / drivers / nvdimm / pmem.h

#ifndef __NVDIMM_PMEM_H__
#define __NVDIMM_PMEM_H__
#include <linux/badblocks.h>
#include <linux/types.h>
#include <linux/pfn_t.h>
#include <linux/fs.h>

#ifdef CONFIG_ARCH_HAS_PMEM_API
#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
void arch_wb_cache_pmem(void *addr, size_t size);
void arch_invalidate_pmem(void *addr, size_t size);
#else
#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
static inline void arch_wb_cache_pmem(void *addr, size_t size)
{
}
static inline void arch_invalidate_pmem(void *addr, size_t size)
{
}
#endif

/* 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;
};

long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
		long nr_pages, void **kaddr, pfn_t *pfn);
#endif /* __NVDIMM_PMEM_H__ */
Commit	Line	Data
f295e53b DW	1	#ifndef __NVDIMM_PMEM_H__
	2	#define __NVDIMM_PMEM_H__
	3	#include <linux/badblocks.h>
	4	#include <linux/types.h>
	5	#include <linux/pfn_t.h>
	6	#include <linux/fs.h>
	7
4e4f00a9	8	#ifdef CONFIG_ARCH_HAS_PMEM_API
ca6a4657	9	#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
4e4f00a9	10	void arch_wb_cache_pmem(void *addr, size_t size);
f2b61257	11	void arch_invalidate_pmem(void *addr, size_t size);
4e4f00a9	12	#else
ca6a4657	13	#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
4e4f00a9 DW	14	static inline void arch_wb_cache_pmem(void *addr, size_t size)
	15	{
	16	}
f2b61257 DW	17	static inline void arch_invalidate_pmem(void *addr, size_t size)
	18	{
	19	}
4e4f00a9 DW	20	#endif
4e4f00a9 DW	21
f295e53b DW	22	/* this definition is in it's own header for tools/testing/nvdimm to consume */
	23	struct pmem_device {
	24	/* One contiguous memory region per device */
	25	phys_addr_t phys_addr;
	26	/* when non-zero this device is hosting a 'pfn' instance */
	27	phys_addr_t data_offset;
	28	u64 pfn_flags;
7a9eb206	29	void *virt_addr;
f295e53b DW	30	/* immutable base size of the namespace */
	31	size_t size;
	32	/* trim size when namespace capacity has been section aligned */
	33	u32 pfn_pad;
975750a9	34	struct kernfs_node *bb_state;
f295e53b	35	struct badblocks bb;
c1d6e828 DW	36	struct dax_device *dax_dev;
c1d6e828 DW	37	struct gendisk *disk;
f295e53b	38	};
c1d6e828 DW	39
	40	long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
	41	long nr_pages, void *kaddr, pfn_t pfn);
f295e53b	42	#endif /* __NVDIMM_PMEM_H__ */