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efebc71118
Provide a replacement pgoff_to_phys() that translates an nfit_test resource (allocated by vmalloc()) to a pfn. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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* Copyright(c) 2016 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef __DAX_PRIVATE_H__
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#define __DAX_PRIVATE_H__
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#include <linux/device.h>
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#include <linux/cdev.h>
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/**
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* struct dax_region - mapping infrastructure for dax devices
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* @id: kernel-wide unique region for a memory range
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* @base: linear address corresponding to @res
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* @kref: to pin while other agents have a need to do lookups
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* @dev: parent device backing this region
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* @align: allocation and mapping alignment for child dax devices
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* @res: physical address range of the region
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* @pfn_flags: identify whether the pfns are paged back or not
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*/
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struct dax_region {
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int id;
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struct ida ida;
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void *base;
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struct kref kref;
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struct device *dev;
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unsigned int align;
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struct resource res;
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unsigned long pfn_flags;
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};
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/**
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* struct dax_dev - subdivision of a dax region
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* @region - parent region
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* @inode - inode
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* @dev - device backing the character device
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* @cdev - core chardev data
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* @alive - !alive + srcu grace period == no new mappings can be established
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* @id - child id in the region
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* @num_resources - number of physical address extents in this device
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* @res - array of physical address ranges
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*/
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struct dax_dev {
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struct dax_region *region;
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struct inode *inode;
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struct device dev;
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struct cdev cdev;
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bool alive;
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int id;
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int num_resources;
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struct resource res[0];
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};
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#endif
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