77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
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#ifndef __DAX_BUS_H__
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#define __DAX_BUS_H__
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#include <linux/device.h>
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#include <linux/range.h>
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struct dev_dax;
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struct resource;
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struct dax_device;
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struct dax_region;
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/* dax bus specific ioresource flags */
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#define IORESOURCE_DAX_STATIC BIT(0)
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#define IORESOURCE_DAX_KMEM BIT(1)
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struct dax_region *alloc_dax_region(struct device *parent, int region_id,
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struct range *range, int target_node, unsigned int align,
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unsigned long flags);
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enum dev_dax_subsys {
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DEV_DAX_BUS = 0, /* zeroed dev_dax_data picks this by default */
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DEV_DAX_CLASS,
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};
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struct dev_dax_data {
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struct dax_region *dax_region;
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struct dev_pagemap *pgmap;
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enum dev_dax_subsys subsys;
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resource_size_t size;
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int id;
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bool memmap_on_memory;
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};
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struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);
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/* to be deleted when DEV_DAX_CLASS is removed */
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struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys);
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enum dax_driver_type {
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DAXDRV_KMEM_TYPE,
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DAXDRV_DEVICE_TYPE,
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};
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struct dax_device_driver {
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struct device_driver drv;
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struct list_head ids;
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enum dax_driver_type type;
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int (*probe)(struct dev_dax *dev);
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void (*remove)(struct dev_dax *dev);
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};
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int __dax_driver_register(struct dax_device_driver *dax_drv,
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struct module *module, const char *mod_name);
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#define dax_driver_register(driver) \
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__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
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void dax_driver_unregister(struct dax_device_driver *dax_drv);
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void kill_dev_dax(struct dev_dax *dev_dax);
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bool static_dev_dax(struct dev_dax *dev_dax);
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#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
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int dev_dax_probe(struct dev_dax *dev_dax);
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#endif
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/*
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* While run_dax() is potentially a generic operation that could be
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* defined in include/linux/dax.h we don't want to grow any users
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* outside of drivers/dax/
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*/
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void run_dax(struct dax_device *dax_dev);
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#define MODULE_ALIAS_DAX_DEVICE(type) \
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MODULE_ALIAS("dax:t" __stringify(type) "*")
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#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
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#endif /* __DAX_BUS_H__ */
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