1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
6*4882a593Smuzhiyun * Copyright (c) Russ Anderson
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/device.h>
10*4882a593Smuzhiyun #include <asm/uv/bios.h>
11*4882a593Smuzhiyun #include <asm/uv/uv.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun struct kobject *sgi_uv_kobj;
14*4882a593Smuzhiyun
partition_id_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)15*4882a593Smuzhiyun static ssize_t partition_id_show(struct kobject *kobj,
16*4882a593Smuzhiyun struct kobj_attribute *attr, char *buf)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
19*4882a593Smuzhiyun }
20*4882a593Smuzhiyun
coherence_id_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)21*4882a593Smuzhiyun static ssize_t coherence_id_show(struct kobject *kobj,
22*4882a593Smuzhiyun struct kobj_attribute *attr, char *buf)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun return snprintf(buf, PAGE_SIZE, "%ld\n", sn_coherency_id);
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun static struct kobj_attribute partition_id_attr =
28*4882a593Smuzhiyun __ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun static struct kobj_attribute coherence_id_attr =
31*4882a593Smuzhiyun __ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun
sgi_uv_sysfs_init(void)34*4882a593Smuzhiyun static int __init sgi_uv_sysfs_init(void)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun unsigned long ret;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (!is_uv_system())
39*4882a593Smuzhiyun return -ENODEV;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if (!sgi_uv_kobj)
42*4882a593Smuzhiyun sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
43*4882a593Smuzhiyun if (!sgi_uv_kobj) {
44*4882a593Smuzhiyun printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
45*4882a593Smuzhiyun return -EINVAL;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
49*4882a593Smuzhiyun if (ret) {
50*4882a593Smuzhiyun printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
51*4882a593Smuzhiyun return ret;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
55*4882a593Smuzhiyun if (ret) {
56*4882a593Smuzhiyun printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
57*4882a593Smuzhiyun return ret;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun return 0;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun device_initcall(sgi_uv_sysfs_init);
64