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
8struct dev_dax;
9struct resource;
10struct dax_device;
11struct dax_region;
12
13/* dax bus specific ioresource flags */
14#define IORESOURCE_DAX_STATIC BIT(0)
15#define IORESOURCE_DAX_KMEM BIT(1)
16
17struct dax_region *alloc_dax_region(struct device *parent, int region_id,
18 struct range *range, int target_node, unsigned int align,
19 unsigned long flags);
20
21struct dev_dax_data {
22 struct dax_region *dax_region;
23 struct dev_pagemap *pgmap;
24 resource_size_t size;
25 int id;
26 bool memmap_on_memory;
27};
28
29struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);
30
31enum dax_driver_type {
32 DAXDRV_KMEM_TYPE,
33 DAXDRV_DEVICE_TYPE,
34};
35
36struct 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
44int __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)
48void dax_driver_unregister(struct dax_device_driver *dax_drv);
49void kill_dev_dax(struct dev_dax *dev_dax);
50bool static_dev_dax(struct dev_dax *dev_dax);
51
52#define MODULE_ALIAS_DAX_DEVICE(type) \
53 MODULE_ALIAS("dax:t" __stringify(type) "*")
54#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
55
56#endif /* __DAX_BUS_H__ */
57

source code of linux/drivers/dax/bus.h