2 * Copyright(c) 2016 Intel Corporation. All rights reserved.
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.
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.
13 #ifndef __DAX_PRIVATE_H__
14 #define __DAX_PRIVATE_H__
16 #include <linux/device.h>
17 #include <linux/cdev.h>
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
37 unsigned long pfn_flags;
41 * struct dax_dev - subdivision of a dax region
42 * @region - parent region
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
52 struct dax_region *region;
59 struct resource res[0];