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1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */3#ifndef __DAX_BUS_H__4#define __DAX_BUS_H__5#include <linux/device.h>6#include <linux/range.h>7 8struct dev_dax;9struct resource;10struct dax_device;11struct dax_region;12 13/* dax bus specific ioresource flags */14#define IORESOURCE_DAX_STATIC BIT(0)15#define IORESOURCE_DAX_KMEM BIT(1)16 17struct dax_region *alloc_dax_region(struct device *parent, int region_id,18 struct range *range, int target_node, unsigned int align,19 unsigned long flags);20 21struct dev_dax_data {22 struct dax_region *dax_region;23 struct dev_pagemap *pgmap;24 resource_size_t size;25 int id;26 bool memmap_on_memory;27};28 29struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);30 31enum dax_driver_type {32 DAXDRV_KMEM_TYPE,33 DAXDRV_DEVICE_TYPE,34};35 36struct dax_device_driver {37 struct device_driver drv;38 struct list_head ids;39 enum dax_driver_type type;40 int (*probe)(struct dev_dax *dev);41 void (*remove)(struct dev_dax *dev);42};43 44int __dax_driver_register(struct dax_device_driver *dax_drv,45 struct module *module, const char *mod_name);46#define dax_driver_register(driver) \47 __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)48void dax_driver_unregister(struct dax_device_driver *dax_drv);49void kill_dev_dax(struct dev_dax *dev_dax);50bool static_dev_dax(struct dev_dax *dev_dax);51 52#define MODULE_ALIAS_DAX_DEVICE(type) \53 MODULE_ALIAS("dax:t" __stringify(type) "*")54#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"55 56#endif /* __DAX_BUS_H__ */57