[linux-2.6-block.git] / drivers / dax / bus.h

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
#ifndef __DAX_BUS_H__
#define __DAX_BUS_H__
#include <linux/device.h>
#include <linux/range.h>

struct dev_dax;
struct resource;
struct dax_device;
struct dax_region;

/* dax bus specific ioresource flags */
#define IORESOURCE_DAX_STATIC BIT(0)
#define IORESOURCE_DAX_KMEM BIT(1)

struct dax_region *alloc_dax_region(struct device *parent, int region_id,
		struct range *range, int target_node, unsigned int align,
		unsigned long flags);

struct dev_dax_data {
	struct dax_region *dax_region;
	struct dev_pagemap *pgmap;
	resource_size_t size;
	int id;
	bool memmap_on_memory;
};

struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);

enum dax_driver_type {
	DAXDRV_KMEM_TYPE,
	DAXDRV_DEVICE_TYPE,
};

struct dax_device_driver {
	struct device_driver drv;
	struct list_head ids;
	enum dax_driver_type type;
	int (*probe)(struct dev_dax *dev);
	void (*remove)(struct dev_dax *dev);
};

int __dax_driver_register(struct dax_device_driver *dax_drv,
		struct module *module, const char *mod_name);
#define dax_driver_register(driver) \
	__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
void dax_driver_unregister(struct dax_device_driver *dax_drv);
void kill_dev_dax(struct dev_dax *dev_dax);
bool static_dev_dax(struct dev_dax *dev_dax);

#define MODULE_ALIAS_DAX_DEVICE(type) \
	MODULE_ALIAS("dax:t" __stringify(type) "*")
#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"

#endif /* __DAX_BUS_H__ */
Commit	Line	Data
51cf784c DW	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__
730926c3	5	#include <linux/device.h>
f5516ec5	6	#include <linux/range.h>
730926c3	7
51cf784c DW	8	struct dev_dax;
	9	struct resource;
	10	struct dax_device;
	11	struct dax_region;
c2f3011e	12
e9ee9fe3 DW	13	/* dax bus specific ioresource flags */
	14	#define IORESOURCE_DAX_STATIC BIT(0)
	15	#define IORESOURCE_DAX_KMEM BIT(1)
	16
51cf784c	17	struct dax_region alloc_dax_region(struct device parent, int region_id,
a4574f63	18	struct range *range, int target_node, unsigned int align,
c2f3011e	19	unsigned long flags);
730926c3	20
174ebece DW	21	struct dev_dax_data {
	22	struct dax_region *dax_region;
	23	struct dev_pagemap *pgmap;
c2f3011e	24	resource_size_t size;
174ebece	25	int id;
4eca0ef4	26	bool memmap_on_memory;
174ebece	27	};
730926c3	28
174ebece	29	struct dev_dax devm_create_dev_dax(struct dev_dax_data data);
730926c3	30
e9ee9fe3 DW	31	enum dax_driver_type {
	32	DAXDRV_KMEM_TYPE,
	33	DAXDRV_DEVICE_TYPE,
	34	};
	35
d200781e DW	36	struct dax_device_driver {
	37	struct device_driver drv;
	38	struct list_head ids;
e9ee9fe3	39	enum dax_driver_type type;
f11cf813	40	int (probe)(struct dev_dax dev);
0d519e0d	41	void (remove)(struct dev_dax dev);
d200781e DW	42	};
	43
	44	int __dax_driver_register(struct dax_device_driver *dax_drv,
9567da0b DW	45	struct module module, const char mod_name);
	46	#define dax_driver_register(driver) \
	47	__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
d200781e	48	void dax_driver_unregister(struct dax_device_driver *dax_drv);
51cf784c	49	void kill_dev_dax(struct dev_dax *dev_dax);
fc65c4eb	50	bool static_dev_dax(struct dev_dax *dev_dax);
9567da0b	51
9567da0b DW	52	#define MODULE_ALIAS_DAX_DEVICE(type) \
	53	MODULE_ALIAS("dax:t" __stringify(type) "*")
	54	#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
	55
51cf784c	56	#endif /* __DAX_BUS_H__ */