mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 10:31:48 +00:00
730926c3b0
On the expectation that some environments may not upgrade libdaxctl (userspace component that depends on the /sys/class/dax hierarchy), provide a default / legacy dax_pmem_compat driver. The dax_pmem_compat driver implements the original /sys/class/dax sysfs layout rather than /sys/bus/dax. When userspace is upgraded it can blacklist this module and switch to the dax_pmem driver going forward. CONFIG_DEV_DAX_PMEM_COMPAT and supporting code will be deleted according to the dax_pmem entry in Documentation/ABI/obsolete/. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
// 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, 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__ */
|