1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
4 *
5 *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
6 *  Copyright (c) Russ Anderson
7 */
8
9#include <linux/device.h>
10#include <asm/uv/bios.h>
11#include <asm/uv/uv.h>
12
13struct kobject *sgi_uv_kobj;
14
15static ssize_t partition_id_show(struct kobject *kobj,
16			struct kobj_attribute *attr, char *buf)
17{
18	return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
19}
20
21static ssize_t coherence_id_show(struct kobject *kobj,
22			struct kobj_attribute *attr, char *buf)
23{
24	return snprintf(buf, PAGE_SIZE, "%ld\n", sn_coherency_id);
25}
26
27static struct kobj_attribute partition_id_attr =
28	__ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
29
30static struct kobj_attribute coherence_id_attr =
31	__ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
32
33
34static int __init sgi_uv_sysfs_init(void)
35{
36	unsigned long ret;
37
38	if (!is_uv_system())
39		return -ENODEV;
40
41	if (!sgi_uv_kobj)
42		sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
43	if (!sgi_uv_kobj) {
44		printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
45		return -EINVAL;
46	}
47
48	ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
49	if (ret) {
50		printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
51		return ret;
52	}
53
54	ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
55	if (ret) {
56		printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
57		return ret;
58	}
59
60	return 0;
61}
62
63device_initcall(sgi_uv_sysfs_init);
64