| /* |
| * Copyright(c) 2016 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| */ |
| #ifndef __DAX_PRIVATE_H__ |
| #define __DAX_PRIVATE_H__ |
| |
| #include <linux/device.h> |
| #include <linux/cdev.h> |
| |
| /** |
| * struct dax_region - mapping infrastructure for dax devices |
| * @id: kernel-wide unique region for a memory range |
| * @base: linear address corresponding to @res |
| * @kref: to pin while other agents have a need to do lookups |
| * @dev: parent device backing this region |
| * @align: allocation and mapping alignment for child dax devices |
| * @res: physical address range of the region |
| * @pfn_flags: identify whether the pfns are paged back or not |
| */ |
| struct dax_region { |
| int id; |
| struct ida ida; |
| void *base; |
| struct kref kref; |
| struct device *dev; |
| unsigned int align; |
| struct resource res; |
| unsigned long pfn_flags; |
| }; |
| |
| /** |
| * struct dev_dax - instance data for a subdivision of a dax region |
| * @region - parent region |
| * @dax_dev - core dax functionality |
| * @dev - device core |
| * @id - child id in the region |
| * @num_resources - number of physical address extents in this device |
| * @res - array of physical address ranges |
| */ |
| struct dev_dax { |
| struct dax_region *region; |
| struct dax_device *dax_dev; |
| struct device dev; |
| int id; |
| int num_resources; |
| struct resource res[0]; |
| }; |
| #endif |