[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>

struct dev_dax;
struct resource;
struct dax_device;
struct dax_region;
void dax_region_put(struct dax_region *dax_region);
struct dax_region *alloc_dax_region(struct device *parent, int region_id,
		struct resource *res, int target_node, unsigned int align,
		unsigned long flags);

enum dev_dax_subsys {
	DEV_DAX_BUS,
	DEV_DAX_CLASS,
};

struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
		struct dev_pagemap *pgmap, enum dev_dax_subsys subsys);

static inline struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
		int id, struct dev_pagemap *pgmap)
{
	return __devm_create_dev_dax(dax_region, id, pgmap, DEV_DAX_BUS);
}

/* to be deleted when DEV_DAX_CLASS is removed */
struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys);

struct dax_device_driver {
	struct device_driver drv;
	struct list_head ids;
	int match_always;
};

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);

#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
int dev_dax_probe(struct device *dev);
#endif

/*
 * While run_dax() is potentially a generic operation that could be
 * defined in include/linux/dax.h we don't want to grow any users
 * outside of drivers/dax/
 */
void run_dax(struct dax_device *dax_dev);

#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 DW	5	#include <linux/device.h>
730926c3 DW	6
51cf784c DW	7	struct dev_dax;
	8	struct resource;
	9	struct dax_device;
	10	struct dax_region;
	11	void dax_region_put(struct dax_region *dax_region);
	12	struct dax_region alloc_dax_region(struct device parent, int region_id,
8fc5c735 DW	13	struct resource *res, int target_node, unsigned int align,
8fc5c735 DW	14	unsigned long flags);
730926c3 DW	15
	16	enum dev_dax_subsys {
	17	DEV_DAX_BUS,
	18	DEV_DAX_CLASS,
	19	};
	20
	21	struct dev_dax __devm_create_dev_dax(struct dax_region dax_region, int id,
	22	struct dev_pagemap *pgmap, enum dev_dax_subsys subsys);
	23
	24	static inline struct dev_dax devm_create_dev_dax(struct dax_region dax_region,
	25	int id, struct dev_pagemap *pgmap)
	26	{
	27	return __devm_create_dev_dax(dax_region, id, pgmap, DEV_DAX_BUS);
	28	}
	29
	30	/* to be deleted when DEV_DAX_CLASS is removed */
	31	struct dev_dax __dax_pmem_probe(struct device dev, enum dev_dax_subsys subsys);
d200781e DW	32
	33	struct dax_device_driver {
	34	struct device_driver drv;
	35	struct list_head ids;
	36	int match_always;
	37	};
	38
	39	int __dax_driver_register(struct dax_device_driver *dax_drv,
9567da0b DW	40	struct module module, const char mod_name);
	41	#define dax_driver_register(driver) \
	42	__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
d200781e	43	void dax_driver_unregister(struct dax_device_driver *dax_drv);
51cf784c	44	void kill_dev_dax(struct dev_dax *dev_dax);
9567da0b	45
730926c3 DW	46	#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
	47	int dev_dax_probe(struct device *dev);
	48	#endif
	49
9567da0b DW	50	/*
	51	* While run_dax() is potentially a generic operation that could be
	52	* defined in include/linux/dax.h we don't want to grow any users
	53	* outside of drivers/dax/
	54	*/
	55	void run_dax(struct dax_device *dax_dev);
	56
	57	#define MODULE_ALIAS_DAX_DEVICE(type) \
	58	MODULE_ALIAS("dax:t" __stringify(type) "*")
	59	#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
	60
51cf784c	61	#endif /* __DAX_BUS_H__ */