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 8 struct dev_dax; 9 struct resource; 10 struct dax_device; 11 struct dax_region; 12 13 /* dax bus specific ioresource flags */ 14 #define IORESOURCE_DAX_STATIC BIT(0) 15 #define IORESOURCE_DAX_KMEM BIT(1) 16 17 struct 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 21 struct dev_dax_data { 22 struct dax_region *dax_region; 23 struct dev_pagemap *pgmap; 24 resource_size_t size; 25 int id; 26 }; 27 28 struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); 29 30 enum dax_driver_type { 31 DAXDRV_KMEM_TYPE, 32 DAXDRV_DEVICE_TYPE, 33 }; 34 35 struct 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 43 int __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) 47 void dax_driver_unregister(struct dax_device_driver *dax_drv); 48 void kill_dev_dax(struct dev_dax *dev_dax); 49 bool 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