projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| efebc711 DJ |
1 | /* |
| 2 | * Copyright(c) 2016 Intel Corporation. All rights reserved. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of version 2 of the GNU General Public License as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, but | |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 11 | * General Public License for more details. | |
| 12 | */ | |
| 13 | #ifndef __DAX_PRIVATE_H__ | |
| 14 | #define __DAX_PRIVATE_H__ | |
| 15 | ||
| 16 | #include <linux/device.h> | |
| 17 | #include <linux/cdev.h> | |
| 18 | ||
| 19 | /** | |
| 20 | * struct dax_region - mapping infrastructure for dax devices | |
| 21 | * @id: kernel-wide unique region for a memory range | |
| 22 | * @base: linear address corresponding to @res | |
| 23 | * @kref: to pin while other agents have a need to do lookups | |
| 24 | * @dev: parent device backing this region | |
| 25 | * @align: allocation and mapping alignment for child dax devices | |
| 26 | * @res: physical address range of the region | |
| 27 | * @pfn_flags: identify whether the pfns are paged back or not | |
| 28 | */ | |
| 29 | struct dax_region { | |
| 30 | int id; | |
| 31 | struct ida ida; | |
| 32 | void *base; | |
| 33 | struct kref kref; | |
| 34 | struct device *dev; | |
| 35 | unsigned int align; | |
| 36 | struct resource res; | |
| 37 | unsigned long pfn_flags; | |
| 38 | }; | |
| 39 | ||
| 40 | /** | |
| 41 | * struct dax_dev - subdivision of a dax region | |
| 42 | * @region - parent region | |
| 43 | * @inode - inode | |
| 44 | * @dev - device backing the character device | |
| 45 | * @cdev - core chardev data | |
| 46 | * @alive - !alive + srcu grace period == no new mappings can be established | |
| 47 | * @id - child id in the region | |
| 48 | * @num_resources - number of physical address extents in this device | |
| 49 | * @res - array of physical address ranges | |
| 50 | */ | |
| 51 | struct dax_dev { | |
| 52 | struct dax_region *region; | |
| 53 | struct inode *inode; | |
| 54 | struct device dev; | |
| 55 | struct cdev cdev; | |
| 56 | bool alive; | |
| 57 | int id; | |
| 58 | int num_resources; | |
| 59 | struct resource res[0]; | |
| 60 | }; | |
| 61 | #endif |