1/*
2 * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
3 *
4 *  This program is free software; you can redistribute it and/or modify
5 *  it under the terms of the GNU General Public License as published by
6 *  the Free Software Foundation; either version 2 of the License, or
7 *  (at your option) any later version.
8 *
9 *  This program is distributed in the hope that it will be useful,
10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 *  GNU General Public License for more details.
13 *
14 *  You should have received a copy of the GNU General Public License
15 *  along with this program; if not, write to the Free Software
16 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
17 *
18 *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
19 *  Copyright (c) Russ Anderson
20 */
21
22#include <linux/device.h>
23#include <asm/uv/bios.h>
24#include <asm/uv/uv.h>
25
26struct kobject *sgi_uv_kobj;
27
28static ssize_t partition_id_show(struct kobject *kobj,
29			struct kobj_attribute *attr, char *buf)
30{
31	return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
32}
33
34static ssize_t coherence_id_show(struct kobject *kobj,
35			struct kobj_attribute *attr, char *buf)
36{
37	return snprintf(buf, PAGE_SIZE, "%ld\n", partition_coherence_id());
38}
39
40static struct kobj_attribute partition_id_attr =
41	__ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
42
43static struct kobj_attribute coherence_id_attr =
44	__ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
45
46
47static int __init sgi_uv_sysfs_init(void)
48{
49	unsigned long ret;
50
51	if (!is_uv_system())
52		return -ENODEV;
53
54	if (!sgi_uv_kobj)
55		sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
56	if (!sgi_uv_kobj) {
57		printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
58		return -EINVAL;
59	}
60
61	ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
62	if (ret) {
63		printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
64		return ret;
65	}
66
67	ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
68	if (ret) {
69		printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
70		return ret;
71	}
72
73	return 0;
74}
75
76device_initcall(sgi_uv_sysfs_init);
77