51cf784c42
Towards eliminating the dax_class, move the dax-device-attribute enabling to a new bus.c file in the core. The amount of code thrash of sub-sequent patches is reduced as no logic changes are made, just pure code movement. A temporary export of unregister_dex_dax() and dax_attribute_groups is needed to preserve compilation, but those symbols become static again in a follow-on patch. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
63 lines
1.8 KiB
C
63 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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/* private routines between core files */
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struct dax_device;
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struct dax_device *inode_dax(struct inode *inode);
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struct inode *dax_inode(struct dax_device *dax_dev);
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/* temporary until devm_create_dax_dev moves to bus.c */
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extern const struct attribute_group *dax_attribute_groups[];
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void unregister_dev_dax(void *dev);
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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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* @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 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 dev_dax - instance data for a subdivision of a dax region
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* @region - parent region
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* @dax_dev - core dax functionality
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* @dev - device core
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*/
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struct dev_dax {
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struct dax_region *region;
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struct dax_device *dax_dev;
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struct device dev;
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};
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static inline struct dev_dax *to_dev_dax(struct device *dev)
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{
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return container_of(dev, struct dev_dax, dev);
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}
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#endif
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