| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */ |
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| 3 | #ifndef __DAX_BUS_H__ |
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| 4 | #define __DAX_BUS_H__ |
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| 5 | #include <linux/device.h> |
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| 6 | #include <linux/range.h> |
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| 7 | |
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| 8 | struct dev_dax; |
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| 9 | struct resource; |
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| 10 | struct dax_device; |
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| 11 | struct dax_region; |
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| 12 | |
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| 13 | /* dax bus specific ioresource flags */ |
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| 14 | #define IORESOURCE_DAX_STATIC BIT(0) |
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| 15 | #define IORESOURCE_DAX_KMEM BIT(1) |
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| 16 | |
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| 17 | struct dax_region *alloc_dax_region(struct device *parent, int region_id, |
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| 18 | struct range *range, int target_node, unsigned int align, |
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| 19 | unsigned long flags); |
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| 20 | |
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| 21 | struct dev_dax_data { |
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| 22 | struct dax_region *dax_region; |
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| 23 | struct dev_pagemap *pgmap; |
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| 24 | resource_size_t size; |
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| 25 | int id; |
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| 26 | bool memmap_on_memory; |
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| 27 | }; |
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| 28 | |
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| 29 | struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data); |
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| 30 | |
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| 31 | enum dax_driver_type { |
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| 32 | DAXDRV_KMEM_TYPE, |
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| 33 | DAXDRV_DEVICE_TYPE, |
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| 34 | }; |
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| 35 | |
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| 36 | struct dax_device_driver { |
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| 37 | struct device_driver drv; |
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| 38 | struct list_head ids; |
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| 39 | enum dax_driver_type type; |
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| 40 | int (*probe)(struct dev_dax *dev); |
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| 41 | void (*remove)(struct dev_dax *dev); |
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| 42 | }; |
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| 43 | |
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| 44 | int __dax_driver_register(struct dax_device_driver *dax_drv, |
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| 45 | struct module *module, const char *mod_name); |
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| 46 | #define dax_driver_register(driver) \ |
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| 47 | __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) |
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| 48 | void dax_driver_unregister(struct dax_device_driver *dax_drv); |
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| 49 | void kill_dev_dax(struct dev_dax *dev_dax); |
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| 50 | bool static_dev_dax(struct dev_dax *dev_dax); |
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| 51 | |
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| 52 | #define MODULE_ALIAS_DAX_DEVICE(type) \ |
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| 53 | MODULE_ALIAS("dax:t" __stringify(type) "*") |
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| 54 | #define DAX_DEVICE_MODALIAS_FMT "dax:t%d" |
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| 55 | |
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| 56 | #endif /* __DAX_BUS_H__ */ |
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| 57 | |
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