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 void dax_region_put(struct dax_region *dax_region); 13 14 #define IORESOURCE_DAX_STATIC (1UL << 0) 15 struct dax_region *alloc_dax_region(struct device *parent, int region_id, 16 struct range *range, int target_node, unsigned int align, 17 unsigned long flags); 18 19 struct dev_dax_data { 20 struct dax_region *dax_region; 21 struct dev_pagemap *pgmap; 22 resource_size_t size; 23 int id; 24 }; 25 26 struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); 27 28 struct dax_device_driver { 29 struct device_driver drv; 30 struct list_head ids; 31 int match_always; 32 int (*probe)(struct dev_dax *dev); 33 void (*remove)(struct dev_dax *dev); 34 }; 35 36 int __dax_driver_register(struct dax_device_driver *dax_drv, 37 struct module *module, const char *mod_name); 38 #define dax_driver_register(driver) \ 39 __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) 40 void dax_driver_unregister(struct dax_device_driver *dax_drv); 41 void kill_dev_dax(struct dev_dax *dev_dax); 42 bool static_dev_dax(struct dev_dax *dev_dax); 43 44 /* 45 * While run_dax() is potentially a generic operation that could be 46 * defined in include/linux/dax.h we don't want to grow any users 47 * outside of drivers/dax/ 48 */ 49 void run_dax(struct dax_device *dax_dev); 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