/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright(c) 2016 Intel Corporation. All rights reserved. */ #ifndef __DAX_PRIVATE_H__ #define __DAX_PRIVATE_H__ #include <linux/device.h> #include <linux/cdev.h> /* private routines between core files */ struct dax_device; struct dax_device *inode_dax(struct inode *inode); struct inode *dax_inode(struct dax_device *dax_dev); int dax_bus_init(void); void dax_bus_exit(void); /** * struct dax_region - mapping infrastructure for dax devices * @id: kernel-wide unique region for a memory range * @target_node: effective numa node if this memory range is onlined * @kref: to pin while other agents have a need to do lookups * @dev: parent device backing this region * @align: allocation and mapping alignment for child dax devices * @res: physical address range of the region * @pfn_flags: identify whether the pfns are paged back or not */ struct dax_region { int id; int target_node; struct kref kref; struct device *dev; unsigned int align; struct resource res; unsigned long pfn_flags; }; /** * struct dev_dax - instance data for a subdivision of a dax region, and * data while the device is activated in the driver. * @region - parent region * @dax_dev - core dax functionality * @target_node: effective numa node if dev_dax memory range is onlined * @dev - device core * @pgmap - pgmap for memmap setup / lifetime (driver owned) * @ref: pgmap reference count (driver owned) * @cmp: @ref final put completion (driver owned) */ struct dev_dax { struct dax_region *region; struct dax_device *dax_dev; int target_node; struct device dev; struct dev_pagemap pgmap; struct percpu_ref ref; struct completion cmp; }; static inline struct dev_dax *to_dev_dax(struct device *dev) { return container_of(dev, struct dev_dax, dev); } #endif