1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/platform_device.h>
#include <linux/memregion.h>
#include <linux/module.h>
#include <linux/pfn_t.h>
#include "bus.h"
static int dax_hmem_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct dev_pagemap pgmap = { };
struct dax_region *dax_region;
struct memregion_info *mri;
struct dev_dax *dev_dax;
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOMEM;
mri = dev->platform_data;
memcpy(&pgmap.res, res, sizeof(*res));
dax_region = alloc_dax_region(dev, pdev->id, res, mri->target_node,
PMD_SIZE, PFN_DEV|PFN_MAP);
if (!dax_region)
return -ENOMEM;
dev_dax = devm_create_dev_dax(dax_region, 0, &pgmap);
if (IS_ERR(dev_dax))
return PTR_ERR(dev_dax);
/* child dev_dax instances now own the lifetime of the dax_region */
dax_region_put(dax_region);
return 0;
}
static int dax_hmem_remove(struct platform_device *pdev)
{
/* devm handles teardown */
return 0;
}
static struct platform_driver dax_hmem_driver = {
.probe = dax_hmem_probe,
.remove = dax_hmem_remove,
.driver = {
.name = "hmem",
},
};
module_platform_driver(dax_hmem_driver);
MODULE_ALIAS("platform:hmem*");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Intel Corporation");
|
