/* * 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