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 | |
13 | /* dax bus specific ioresource flags */ |
14 | #define IORESOURCE_DAX_STATIC BIT(0) |
15 | #define IORESOURCE_DAX_KMEM BIT(1) |
16 | |
17 | struct 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 | |
21 | struct dev_dax_data { |
22 | struct dax_region *dax_region; |
23 | struct dev_pagemap *pgmap; |
24 | resource_size_t size; |
25 | int id; |
26 | }; |
27 | |
28 | struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); |
29 | |
30 | enum dax_driver_type { |
31 | DAXDRV_KMEM_TYPE, |
32 | DAXDRV_DEVICE_TYPE, |
33 | }; |
34 | |
35 | struct dax_device_driver { |
36 | struct device_driver drv; |
37 | struct list_head ids; |
38 | enum dax_driver_type type; |
39 | int (*probe)(struct dev_dax *dev); |
40 | void (*remove)(struct dev_dax *dev); |
41 | }; |
42 | |
43 | int __dax_driver_register(struct dax_device_driver *dax_drv, |
44 | struct module *module, const char *mod_name); |
45 | #define dax_driver_register(driver) \ |
46 | __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) |
47 | void dax_driver_unregister(struct dax_device_driver *dax_drv); |
48 | void kill_dev_dax(struct dev_dax *dev_dax); |
49 | bool static_dev_dax(struct dev_dax *dev_dax); |
50 | |
51 | #define MODULE_ALIAS_DAX_DEVICE(type) \ |
52 | MODULE_ALIAS("dax:t" __stringify(type) "*") |
53 | #define DAX_DEVICE_MODALIAS_FMT "dax:t%d" |
54 | |
55 | #endif /* __DAX_BUS_H__ */ |
56 | |