LXR linux/drivers/dax/bus.h

   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
   7struct dev_dax;
   8struct resource;
   9struct dax_device;
  10struct dax_region;
  11void dax_region_put(struct dax_region *dax_region);
  12struct dax_region *alloc_dax_region(struct device *parent, int region_id,
  13                struct resource *res, int target_node, unsigned int align,
  14                unsigned long flags);
  15
  16enum dev_dax_subsys {
  17        DEV_DAX_BUS,
  18        DEV_DAX_CLASS,
  19};
  20
  21struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
  22                struct dev_pagemap *pgmap, enum dev_dax_subsys subsys);
  23
  24static 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 */
  31struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys);
  32
  33struct dax_device_driver {
  34        struct device_driver drv;
  35        struct list_head ids;
  36        int match_always;
  37};
  38
  39int __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)
  43void dax_driver_unregister(struct dax_device_driver *dax_drv);
  44void kill_dev_dax(struct dev_dax *dev_dax);
  45
  46#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
  47int 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 */
  55void 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