1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright(c) 2016 Intel Corporation. All rights reserved. 4 */ 5#ifndef __DAX_PRIVATE_H__ 6#define __DAX_PRIVATE_H__ 7 8#include <linux/device.h> 9#include <linux/cdev.h> 10 11/* private routines between core files */ 12struct dax_device; 13struct dax_device *inode_dax(struct inode *inode); 14struct inode *dax_inode(struct dax_device *dax_dev); 15int dax_bus_init(void); 16void dax_bus_exit(void); 17 18/** 19 * struct dax_region - mapping infrastructure for dax devices 20 * @id: kernel-wide unique region for a memory range 21 * @target_node: effective numa node if this memory range is onlined 22 * @kref: to pin while other agents have a need to do lookups 23 * @dev: parent device backing this region 24 * @align: allocation and mapping alignment for child dax devices 25 * @res: physical address range of the region 26 * @pfn_flags: identify whether the pfns are paged back or not 27 */ 28struct dax_region { 29 int id; 30 int target_node; 31 struct kref kref; 32 struct device *dev; 33 unsigned int align; 34 struct resource res; 35 unsigned long pfn_flags; 36}; 37 38/** 39 * struct dev_dax - instance data for a subdivision of a dax region, and 40 * data while the device is activated in the driver. 41 * @region - parent region 42 * @dax_dev - core dax functionality 43 * @target_node: effective numa node if dev_dax memory range is onlined 44 * @dev - device core 45 * @pgmap - pgmap for memmap setup / lifetime (driver owned) 46 * @dax_mem_res: physical address range of hotadded DAX memory 47 */ 48struct dev_dax { 49 struct dax_region *region; 50 struct dax_device *dax_dev; 51 int target_node; 52 struct device dev; 53 struct dev_pagemap pgmap; 54 struct resource *dax_kmem_res; 55}; 56 57static inline struct dev_dax *to_dev_dax(struct device *dev) 58{ 59 return container_of(dev, struct dev_dax, dev); 60} 61#endif 62