| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * Copyright(c) 2016 Intel Corporation. All rights reserved. |
| 4 | */ |
| 5 | #ifndef __DAX_PRIVATE_H__ |
| 6 | #define __DAX_PRIVATE_H__ |
| 7 | |
| 8 | #include <linux/device.h> |
| 9 | #include <linux/cdev.h> |
| 10 | |
| 11 | /* private routines between core files */ |
| 12 | struct dax_device; |
| 13 | struct dax_device *inode_dax(struct inode *inode); |
| 14 | struct inode *dax_inode(struct dax_device *dax_dev); |
| 15 | int dax_bus_init(void); |
| 16 | void dax_bus_exit(void); |
| 17 | |
| 18 | /** |
| 19 | * struct dax_region - mapping infrastructure for dax devices |
| 20 | * @id: kernel-wide unique region for a memory range |
| 21 | * @target_node: effective numa node if this memory range is onlined |
| 22 | * @kref: to pin while other agents have a need to do lookups |
| 23 | * @dev: parent device backing this region |
| 24 | * @align: allocation and mapping alignment for child dax devices |
| 25 | * @res: physical address range of the region |
| 26 | * @pfn_flags: identify whether the pfns are paged back or not |
| 27 | */ |
| 28 | struct dax_region { |
| 29 | int id; |
| 30 | int target_node; |
| 31 | struct kref kref; |
| 32 | struct device *dev; |
| 33 | unsigned int align; |
| 34 | struct resource res; |
| 35 | unsigned long long pfn_flags; |
| 36 | }; |
| 37 | |
| 38 | /** |
| 39 | * struct dev_dax - instance data for a subdivision of a dax region, and |
| 40 | * data while the device is activated in the driver. |
| 41 | * @region - parent region |
| 42 | * @dax_dev - core dax functionality |
| 43 | * @target_node: effective numa node if dev_dax memory range is onlined |
| 44 | * @dev - device core |
| 45 | * @pgmap - pgmap for memmap setup / lifetime (driver owned) |
| 46 | * @dax_mem_res: physical address range of hotadded DAX memory |
| 47 | */ |
| 48 | struct dev_dax { |
| 49 | struct dax_region *region; |
| 50 | struct dax_device *dax_dev; |
| 51 | int target_node; |
| 52 | struct device dev; |
| 53 | struct dev_pagemap pgmap; |
| 54 | struct resource *dax_kmem_res; |
| 55 | }; |
| 56 | |
| 57 | static inline struct dev_dax *to_dev_dax(struct device *dev) |
| 58 | { |
| 59 | return container_of(dev, struct dev_dax, dev); |
| 60 | } |
| 61 | #endif |