2019-05-29 22:18:09 +08:00
|
|
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
2017-04-08 06:33:36 +08:00
|
|
|
/*
|
|
|
|
|
* Copyright(c) 2016 Intel Corporation. All rights reserved.
|
|
|
|
|
*/
|
|
|
|
|
#ifndef __DAX_PRIVATE_H__
|
|
|
|
|
#define __DAX_PRIVATE_H__
|
|
|
|
|
|
|
|
|
|
#include <linux/device.h>
|
|
|
|
|
#include <linux/cdev.h>
|
|
|
|
|
|
2017-07-13 08:58:21 +08:00
|
|
|
/* private routines between core files */
|
|
|
|
|
struct dax_device;
|
|
|
|
|
struct dax_device *inode_dax(struct inode *inode);
|
|
|
|
|
struct inode *dax_inode(struct dax_device *dax_dev);
|
2017-07-13 08:58:21 +08:00
|
|
|
int dax_bus_init(void);
|
|
|
|
|
void dax_bus_exit(void);
|
2017-07-13 08:58:21 +08:00
|
|
|
|
2017-04-08 06:33:36 +08:00
|
|
|
/**
|
|
|
|
|
* struct dax_region - mapping infrastructure for dax devices
|
|
|
|
|
* @id: kernel-wide unique region for a memory range
|
2018-11-10 04:43:07 +08:00
|
|
|
* @target_node: effective numa node if this memory range is onlined
|
2017-04-08 06:33:36 +08:00
|
|
|
* @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;
|
2018-11-10 04:43:07 +08:00
|
|
|
int target_node;
|
2017-04-08 06:33:36 +08:00
|
|
|
struct kref kref;
|
|
|
|
|
struct device *dev;
|
|
|
|
|
unsigned int align;
|
|
|
|
|
struct resource res;
|
|
|
|
|
unsigned long pfn_flags;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
2018-10-30 06:52:42 +08:00
|
|
|
* struct dev_dax - instance data for a subdivision of a dax region, and
|
|
|
|
|
* data while the device is activated in the driver.
|
2017-04-08 06:33:36 +08:00
|
|
|
* @region - parent region
|
2017-05-05 14:38:43 +08:00
|
|
|
* @dax_dev - core dax functionality
|
2018-11-10 04:43:07 +08:00
|
|
|
* @target_node: effective numa node if dev_dax memory range is onlined
|
2017-05-05 14:38:43 +08:00
|
|
|
* @dev - device core
|
2018-10-30 06:52:42 +08:00
|
|
|
* @pgmap - pgmap for memmap setup / lifetime (driver owned)
|
2019-07-17 07:30:35 +08:00
|
|
|
* @dax_mem_res: physical address range of hotadded DAX memory
|
2017-04-08 06:33:36 +08:00
|
|
|
*/
|
2017-05-05 14:38:43 +08:00
|
|
|
struct dev_dax {
|
2017-04-08 06:33:36 +08:00
|
|
|
struct dax_region *region;
|
2017-05-05 14:38:43 +08:00
|
|
|
struct dax_device *dax_dev;
|
2018-11-10 04:43:07 +08:00
|
|
|
int target_node;
|
2017-04-08 06:33:36 +08:00
|
|
|
struct device dev;
|
2018-10-30 06:52:42 +08:00
|
|
|
struct dev_pagemap pgmap;
|
2019-07-17 07:30:35 +08:00
|
|
|
struct resource *dax_kmem_res;
|
2017-04-08 06:33:36 +08:00
|
|
|
};
|
2017-07-13 08:58:21 +08:00
|
|
|
|
|
|
|
|
static inline struct dev_dax *to_dev_dax(struct device *dev)
|
|
|
|
|
{
|
|
|
|
|
return container_of(dev, struct dev_dax, dev);
|
|
|
|
|
}
|
2017-04-08 06:33:36 +08:00
|
|
|
#endif
|
