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