1// SPDX-License-Identifier: GPL-2.0 2/* 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}; 27 28struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); 29 30enum dax_driver_type { 31 DAXDRV_KMEM_TYPE, 32 DAXDRV_DEVICE_TYPE, 33}; 34 35struct dax_device_driver { 36 struct device_driver drv; 37 struct list_head ids; 38 enum dax_driver_type type; 39 int (*probe)(struct dev_dax *dev); 40 void (*remove)(struct dev_dax *dev); 41}; 42 43int __dax_driver_register(struct dax_device_driver *dax_drv, 44 struct module *module, const char *mod_name); 45#define dax_driver_register(driver) \ 46 __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) 47void dax_driver_unregister(struct dax_device_driver *dax_drv); 48void kill_dev_dax(struct dev_dax *dev_dax); 49bool static_dev_dax(struct dev_dax *dev_dax); 50 51#define MODULE_ALIAS_DAX_DEVICE(type) \ 52 MODULE_ALIAS("dax:t" __stringify(type) "*") 53#define DAX_DEVICE_MODALIAS_FMT "dax:t%d" 54 55#endif /* __DAX_BUS_H__ */ 56