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5b497af4 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
efebc711 DJ |
2 | /* |
3 | * Copyright(c) 2016 Intel Corporation. All rights reserved. | |
efebc711 DJ |
4 | */ |
5 | #ifndef __DAX_PRIVATE_H__ | |
6 | #define __DAX_PRIVATE_H__ | |
7 | ||
8 | #include <linux/device.h> | |
9 | #include <linux/cdev.h> | |
10 | ||
51cf784c DW |
11 | /* private routines between core files */ |
12 | struct dax_device; | |
13 | struct dax_device *inode_dax(struct inode *inode); | |
14 | struct inode *dax_inode(struct dax_device *dax_dev); | |
9567da0b DW |
15 | int dax_bus_init(void); |
16 | void dax_bus_exit(void); | |
51cf784c | 17 | |
efebc711 DJ |
18 | /** |
19 | * struct dax_region - mapping infrastructure for dax devices | |
20 | * @id: kernel-wide unique region for a memory range | |
8fc5c735 | 21 | * @target_node: effective numa node if this memory range is onlined |
efebc711 DJ |
22 | * @kref: to pin while other agents have a need to do lookups |
23 | * @dev: parent device backing this region | |
24 | * @align: allocation and mapping alignment for child dax devices | |
25 | * @res: physical address range of the region | |
26 | * @pfn_flags: identify whether the pfns are paged back or not | |
27 | */ | |
28 | struct dax_region { | |
29 | int id; | |
8fc5c735 | 30 | int target_node; |
efebc711 DJ |
31 | struct kref kref; |
32 | struct device *dev; | |
33 | unsigned int align; | |
34 | struct resource res; | |
35 | unsigned long pfn_flags; | |
36 | }; | |
37 | ||
38 | /** | |
89ec9f2c DW |
39 | * struct dev_dax - instance data for a subdivision of a dax region, and |
40 | * data while the device is activated in the driver. | |
efebc711 | 41 | * @region - parent region |
73616367 | 42 | * @dax_dev - core dax functionality |
8fc5c735 | 43 | * @target_node: effective numa node if dev_dax memory range is onlined |
73616367 | 44 | * @dev - device core |
89ec9f2c DW |
45 | * @pgmap - pgmap for memmap setup / lifetime (driver owned) |
46 | * @ref: pgmap reference count (driver owned) | |
47 | * @cmp: @ref final put completion (driver owned) | |
efebc711 | 48 | */ |
73616367 | 49 | struct dev_dax { |
efebc711 | 50 | struct dax_region *region; |
73616367 | 51 | struct dax_device *dax_dev; |
8fc5c735 | 52 | int target_node; |
efebc711 | 53 | struct device dev; |
89ec9f2c DW |
54 | struct dev_pagemap pgmap; |
55 | struct percpu_ref ref; | |
56 | struct completion cmp; | |
efebc711 | 57 | }; |
51cf784c DW |
58 | |
59 | static inline struct dev_dax *to_dev_dax(struct device *dev) | |
60 | { | |
61 | return container_of(dev, struct dev_dax, dev); | |
62 | } | |
efebc711 | 63 | #endif |