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
57
58
59
60
61
62
63
64
65
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/platform_device.h>
#include <linux/memregion.h>
#include <linux/module.h>
#include <linux/dax.h>
#include <linux/mm.h>
void hmem_register_device(int target_nid, struct resource *r)
{
/* define a clean / non-busy resource for the platform device */
struct resource res = {
.start = r->start,
.end = r->end,
.flags = IORESOURCE_MEM,
};
struct platform_device *pdev;
struct memregion_info info;
int rc, id;
rc = region_intersects(res.start, resource_size(&res), IORESOURCE_MEM,
IORES_DESC_SOFT_RESERVED);
if (rc != REGION_INTERSECTS)
return;
id = memregion_alloc(GFP_KERNEL);
if (id < 0) {
pr_err("memregion allocation failure for %pr\n", &res);
return;
}
pdev = platform_device_alloc("hmem", id);
if (!pdev) {
pr_err("hmem device allocation failure for %pr\n", &res);
goto out_pdev;
}
pdev->dev.numa_node = numa_map_to_online_node(target_nid);
info = (struct memregion_info) {
.target_node = target_nid,
};
rc = platform_device_add_data(pdev, &info, sizeof(info));
if (rc < 0) {
pr_err("hmem memregion_info allocation failure for %pr\n", &res);
goto out_pdev;
}
rc = platform_device_add_resources(pdev, &res, 1);
if (rc < 0) {
pr_err("hmem resource allocation failure for %pr\n", &res);
goto out_resource;
}
rc = platform_device_add(pdev);
if (rc < 0) {
dev_err(&pdev->dev, "device add failed for %pr\n", &res);
goto out_resource;
}
return;
out_resource:
put_device(&pdev->dev);
out_pdev:
memregion_free(id);
}
|
