64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
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*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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* Copyright (c) Russ Anderson
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*/
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#include <linux/device.h>
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#include <asm/uv/bios.h>
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#include <asm/uv/uv.h>
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struct kobject *sgi_uv_kobj;
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static ssize_t partition_id_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
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}
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static ssize_t coherence_id_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%ld\n", uv_partition_coherence_id());
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}
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static struct kobj_attribute partition_id_attr =
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__ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
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static struct kobj_attribute coherence_id_attr =
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__ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
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static int __init sgi_uv_sysfs_init(void)
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{
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unsigned long ret;
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if (!is_uv_system())
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return -ENODEV;
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if (!sgi_uv_kobj)
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sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
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if (!sgi_uv_kobj) {
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printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
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return -EINVAL;
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}
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ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
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if (ret) {
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printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
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return ret;
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}
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ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
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if (ret) {
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printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
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return ret;
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}
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return 0;
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}
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device_initcall(sgi_uv_sysfs_init);
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