1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */ 3*4882a593Smuzhiyun #ifndef __DAX_BUS_H__ 4*4882a593Smuzhiyun #define __DAX_BUS_H__ 5*4882a593Smuzhiyun #include <linux/device.h> 6*4882a593Smuzhiyun #include <linux/range.h> 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun struct dev_dax; 9*4882a593Smuzhiyun struct resource; 10*4882a593Smuzhiyun struct dax_device; 11*4882a593Smuzhiyun struct dax_region; 12*4882a593Smuzhiyun void dax_region_put(struct dax_region *dax_region); 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #define IORESOURCE_DAX_STATIC (1UL << 0) 15*4882a593Smuzhiyun struct dax_region *alloc_dax_region(struct device *parent, int region_id, 16*4882a593Smuzhiyun struct range *range, int target_node, unsigned int align, 17*4882a593Smuzhiyun unsigned long flags); 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun enum dev_dax_subsys { 20*4882a593Smuzhiyun DEV_DAX_BUS = 0, /* zeroed dev_dax_data picks this by default */ 21*4882a593Smuzhiyun DEV_DAX_CLASS, 22*4882a593Smuzhiyun }; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun struct dev_dax_data { 25*4882a593Smuzhiyun struct dax_region *dax_region; 26*4882a593Smuzhiyun struct dev_pagemap *pgmap; 27*4882a593Smuzhiyun enum dev_dax_subsys subsys; 28*4882a593Smuzhiyun resource_size_t size; 29*4882a593Smuzhiyun int id; 30*4882a593Smuzhiyun }; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun /* to be deleted when DEV_DAX_CLASS is removed */ 35*4882a593Smuzhiyun struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys); 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun struct dax_device_driver { 38*4882a593Smuzhiyun struct device_driver drv; 39*4882a593Smuzhiyun struct list_head ids; 40*4882a593Smuzhiyun int match_always; 41*4882a593Smuzhiyun int (*probe)(struct dev_dax *dev); 42*4882a593Smuzhiyun int (*remove)(struct dev_dax *dev); 43*4882a593Smuzhiyun }; 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun int __dax_driver_register(struct dax_device_driver *dax_drv, 46*4882a593Smuzhiyun struct module *module, const char *mod_name); 47*4882a593Smuzhiyun #define dax_driver_register(driver) \ 48*4882a593Smuzhiyun __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) 49*4882a593Smuzhiyun void dax_driver_unregister(struct dax_device_driver *dax_drv); 50*4882a593Smuzhiyun void kill_dev_dax(struct dev_dax *dev_dax); 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT) 53*4882a593Smuzhiyun int dev_dax_probe(struct dev_dax *dev_dax); 54*4882a593Smuzhiyun #endif 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun /* 57*4882a593Smuzhiyun * While run_dax() is potentially a generic operation that could be 58*4882a593Smuzhiyun * defined in include/linux/dax.h we don't want to grow any users 59*4882a593Smuzhiyun * outside of drivers/dax/ 60*4882a593Smuzhiyun */ 61*4882a593Smuzhiyun void run_dax(struct dax_device *dax_dev); 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun #define MODULE_ALIAS_DAX_DEVICE(type) \ 64*4882a593Smuzhiyun MODULE_ALIAS("dax:t" __stringify(type) "*") 65*4882a593Smuzhiyun #define DAX_DEVICE_MODALIAS_FMT "dax:t%d" 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun #endif /* __DAX_BUS_H__ */ 68