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 8 #ifdef CONFIG_ARCH_HAS_PMEM_API 9 #define ARCH_MEMREMAP_PMEM MEMREMAP_WB 10 void arch_wb_cache_pmem(void *addr, size_t size); 11 void arch_invalidate_pmem(void *addr, size_t size); 12 #else 13 #define ARCH_MEMREMAP_PMEM MEMREMAP_WT 14 static inline void arch_wb_cache_pmem(void *addr, size_t size) 15 { 16 } 17 static inline void arch_invalidate_pmem(void *addr, size_t size) 18 { 19 } 20 #endif 21 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; 29 void *virt_addr; 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; 34 struct kernfs_node *bb_state; 35 struct badblocks bb; 36 struct dax_device *dax_dev; 37 struct gendisk *disk; 38 }; 39 40 long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, 41 long nr_pages, void **kaddr, pfn_t *pfn); 42 #endif /* __NVDIMM_PMEM_H__ */ 43