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 7 struct dev_dax; 8 struct resource; 9 struct dax_device; 10 struct dax_region; 11 void dax_region_put(struct dax_region *dax_region); 12 struct dax_region *alloc_dax_region(struct device *parent, int region_id, 13 struct resource *res, int target_node, unsigned int align, 14 unsigned long long flags); 15 16 enum dev_dax_subsys { 17 DEV_DAX_BUS, 18 DEV_DAX_CLASS, 19 }; 20 21 struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id, 22 struct dev_pagemap *pgmap, enum dev_dax_subsys subsys); 23 24 static inline struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region, 25 int id, struct dev_pagemap *pgmap) 26 { 27 return __devm_create_dev_dax(dax_region, id, pgmap, DEV_DAX_BUS); 28 } 29 30 /* to be deleted when DEV_DAX_CLASS is removed */ 31 struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys); 32 33 struct dax_device_driver { 34 struct device_driver drv; 35 struct list_head ids; 36 int match_always; 37 }; 38 39 int __dax_driver_register(struct dax_device_driver *dax_drv, 40 struct module *module, const char *mod_name); 41 #define dax_driver_register(driver) \ 42 __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) 43 void dax_driver_unregister(struct dax_device_driver *dax_drv); 44 void kill_dev_dax(struct dev_dax *dev_dax); 45 46 #if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT) 47 int dev_dax_probe(struct device *dev); 48 #endif 49 50 /* 51 * While run_dax() is potentially a generic operation that could be 52 * defined in include/linux/dax.h we don't want to grow any users 53 * outside of drivers/dax/ 54 */ 55 void run_dax(struct dax_device *dax_dev); 56 57 #define MODULE_ALIAS_DAX_DEVICE(type) \ 58 MODULE_ALIAS("dax:t" __stringify(type) "*") 59 #define DAX_DEVICE_MODALIAS_FMT "dax:t%d" 60 61 #endif /* __DAX_BUS_H__ */ 62