// SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */ #ifndef __DAX_BUS_H__ #define __DAX_BUS_H__ #include <linux/device.h> #include <linux/range.h> struct dev_dax; struct resource; struct dax_device; struct dax_region; void dax_region_put(struct dax_region *dax_region); /* dax bus specific ioresource flags */ #define IORESOURCE_DAX_STATIC BIT(0) #define IORESOURCE_DAX_KMEM BIT(1) struct dax_region *alloc_dax_region(struct device *parent, int region_id, struct range *range, int target_node, unsigned int align, unsigned long flags); struct dev_dax_data { struct dax_region *dax_region; struct dev_pagemap *pgmap; resource_size_t size; int id; }; struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); enum dax_driver_type { DAXDRV_KMEM_TYPE, DAXDRV_DEVICE_TYPE, }; struct dax_device_driver { struct device_driver drv; struct list_head ids; enum dax_driver_type type; int (*probe)(struct dev_dax *dev); void (*remove)(struct dev_dax *dev); }; int __dax_driver_register(struct dax_device_driver *dax_drv, struct module *module, const char *mod_name); #define dax_driver_register(driver) \ __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) void dax_driver_unregister(struct dax_device_driver *dax_drv); void kill_dev_dax(struct dev_dax *dev_dax); bool static_dev_dax(struct dev_dax *dev_dax); /* * While run_dax() is potentially a generic operation that could be * defined in include/linux/dax.h we don't want to grow any users * outside of drivers/dax/ */ void run_dax(struct dax_device *dax_dev); #define MODULE_ALIAS_DAX_DEVICE(type) \ MODULE_ALIAS("dax:t" __stringify(type) "*") #define DAX_DEVICE_MODALIAS_FMT "dax:t%d" #endif /* __DAX_BUS_H__ */