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51cf784c DW |
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__ | |
730926c3 DW |
5 | #include <linux/device.h> |
6 | ||
51cf784c DW |
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, | |
8fc5c735 | 13 | struct resource *res, int target_node, unsigned int align, |
460370ab | 14 | unsigned long long flags); |
730926c3 DW |
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 | ||
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); | |
d200781e DW |
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, | |
9567da0b DW |
40 | struct module *module, const char *mod_name); |
41 | #define dax_driver_register(driver) \ | |
42 | __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) | |
d200781e | 43 | void dax_driver_unregister(struct dax_device_driver *dax_drv); |
51cf784c | 44 | void kill_dev_dax(struct dev_dax *dev_dax); |
9567da0b | 45 | |
730926c3 DW |
46 | #if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT) |
47 | int dev_dax_probe(struct device *dev); | |
48 | #endif | |
49 | ||
9567da0b DW |
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 | ||
51cf784c | 61 | #endif /* __DAX_BUS_H__ */ |