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 /* dax bus specific ioresource flags */ 15 #define IORESOURCE_DAX_STATIC BIT(0) 16 #define IORESOURCE_DAX_KMEM BIT(1) 17 18 struct dax_region *alloc_dax_region(struct device *parent, int region_id, 19 struct range *range, int target_node, unsigned int align, 20 unsigned long flags); 21 22 struct dev_dax_data { 23 struct dax_region *dax_region; 24 struct dev_pagemap *pgmap; 25 resource_size_t size; 26 int id; 27 }; 28 29 struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); 30 31 enum dax_driver_type { 32 DAXDRV_KMEM_TYPE, 33 DAXDRV_DEVICE_TYPE, 34 }; 35 36 struct 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 44 int __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) 48 void dax_driver_unregister(struct dax_device_driver *dax_drv); 49 void kill_dev_dax(struct dev_dax *dev_dax); 50 bool static_dev_dax(struct dev_dax *dev_dax); 51 52 /* 53 * While run_dax() is potentially a generic operation that could be 54 * defined in include/linux/dax.h we don't want to grow any users 55 * outside of drivers/dax/ 56 */ 57 void run_dax(struct dax_device *dax_dev); 58 59 #define MODULE_ALIAS_DAX_DEVICE(type) \ 60 MODULE_ALIAS("dax:t" __stringify(type) "*") 61 #define DAX_DEVICE_MODALIAS_FMT "dax:t%d" 62 63 #endif /* __DAX_BUS_H__ */ 64