1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
3#include <linux/percpu-refcount.h>
4#include <linux/memremap.h>
5#include <linux/module.h>
6#include <linux/pfn_t.h>
7#include <linux/nd.h>
8#include "../bus.h"
9
10/* we need the private definitions to implement compat suport */
11#include "../dax-private.h"
12
13static int dax_pmem_compat_probe(struct device *dev)
14{
15 struct dev_dax *dev_dax = __dax_pmem_probe(dev, DEV_DAX_CLASS);
16 int rc;
17
18 if (IS_ERR(dev_dax))
19 return PTR_ERR(dev_dax);
20
21 if (!devres_open_group(&dev_dax->dev, dev_dax, GFP_KERNEL))
22 return -ENOMEM;
23
24 device_lock(&dev_dax->dev);
25 rc = dev_dax_probe(&dev_dax->dev);
26 device_unlock(&dev_dax->dev);
27
28 devres_close_group(&dev_dax->dev, dev_dax);
29 if (rc)
30 devres_release_group(&dev_dax->dev, dev_dax);
31
32 return rc;
33}
34
35static int dax_pmem_compat_release(struct device *dev, void *data)
36{
37 device_lock(dev);
38 devres_release_group(dev, to_dev_dax(dev));
39 device_unlock(dev);
40
41 return 0;
42}
43
44static int dax_pmem_compat_remove(struct device *dev)
45{
46 device_for_each_child(dev, NULL, dax_pmem_compat_release);
47 return 0;
48}
49
50static struct nd_device_driver dax_pmem_compat_driver = {
51 .probe = dax_pmem_compat_probe,
52 .remove = dax_pmem_compat_remove,
53 .drv = {
54 .name = "dax_pmem_compat",
55 },
56 .type = ND_DRIVER_DAX_PMEM,
57};
58
59static int __init dax_pmem_compat_init(void)
60{
61 return nd_driver_register(&dax_pmem_compat_driver);
62}
63module_init(dax_pmem_compat_init);
64
65static void __exit dax_pmem_compat_exit(void)
66{
67 driver_unregister(&dax_pmem_compat_driver.drv);
68}
69module_exit(dax_pmem_compat_exit);
70
71MODULE_LICENSE("GPL v2");
72MODULE_AUTHOR("Intel Corporation");
73MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_PMEM);
74