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

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
 3#ifndef __DAX_BUS_H__
 4#define __DAX_BUS_H__
 5#include <linux/device.h>
 6#include <linux/range.h>
 7
 8struct dev_dax;
 9struct resource;
10struct dax_device;
11struct dax_region;
12void dax_region_put(struct dax_region *dax_region);
13
14#define IORESOURCE_DAX_STATIC (1UL << 0)
 
 
 
15struct dax_region *alloc_dax_region(struct device *parent, int region_id,
16		struct range *range, int target_node, unsigned int align,
17		unsigned long flags);
18
19enum dev_dax_subsys {
20	DEV_DAX_BUS = 0, /* zeroed dev_dax_data picks this by default */
21	DEV_DAX_CLASS,
22};
23
24struct dev_dax_data {
25	struct dax_region *dax_region;
26	struct dev_pagemap *pgmap;
27	enum dev_dax_subsys subsys;
28	resource_size_t size;
29	int id;
 
30};
31
32struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);
33
34/* to be deleted when DEV_DAX_CLASS is removed */
35struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys);
 
 
36
37struct dax_device_driver {
38	struct device_driver drv;
39	struct list_head ids;
40	int match_always;
41	int (*probe)(struct dev_dax *dev);
42	void (*remove)(struct dev_dax *dev);
43};
44
45int __dax_driver_register(struct dax_device_driver *dax_drv,
46		struct module *module, const char *mod_name);
47#define dax_driver_register(driver) \
48	__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
49void dax_driver_unregister(struct dax_device_driver *dax_drv);
50void kill_dev_dax(struct dev_dax *dev_dax);
51
52#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
53int dev_dax_probe(struct dev_dax *dev_dax);
54#endif
55
56/*
57 * While run_dax() is potentially a generic operation that could be
58 * defined in include/linux/dax.h we don't want to grow any users
59 * outside of drivers/dax/
60 */
61void run_dax(struct dax_device *dax_dev);
62
63#define MODULE_ALIAS_DAX_DEVICE(type) \
64	MODULE_ALIAS("dax:t" __stringify(type) "*")
65#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
66
67#endif /* __DAX_BUS_H__ */