LXR linux/arch/x86/platform/uv/uv

   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", uv_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