x86: Add sysfs entries for UV v4

Create /sys/firmware/sgi_uv sysfs entries for partition_id and coherence_id.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 74 insertions, 1 deletions

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index acc0e8bf043e..cb6ade443f00 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -108,7 +108,7 @@ obj-$(CONFIG_MICROCODE)			+= microcode.o
 # 64 bit specific files
 ifeq ($(CONFIG_X86_64),y)
         obj-y                           += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
-        obj-y                           += bios_uv.o uv_irq.o
+        obj-y                           += bios_uv.o uv_irq.o uv_sysfs.o
         obj-y                           += genx2apic_cluster.o
         obj-y                           += genx2apic_phys.o
         obj-$(CONFIG_X86_PM_TIMER)      += pmtimer_64.o
diff --git a/arch/x86/kernel/uv_sysfs.c b/arch/x86/kernel/uv_sysfs.c
new file mode 100644
index 000000000000..67f9b9dbf800
--- /dev/null
+++ b/arch/x86/kernel/uv_sysfs.c
@@ -0,0 +1,72 @@
+/*
+ * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+ *  Copyright (c) Russ Anderson
+ */
+
+#include <linux/sysdev.h>
+#include <asm/uv/bios.h>
+
+struct kobject *sgi_uv_kobj;
+
+static ssize_t partition_id_show(struct kobject *kobj,
+                        struct kobj_attribute *attr, char *buf)
+{
+        return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
+}
+
+static ssize_t coherence_id_show(struct kobject *kobj,
+                        struct kobj_attribute *attr, char *buf)
+{
+        return snprintf(buf, PAGE_SIZE, "%ld\n", partition_coherence_id());
+}
+
+static struct kobj_attribute partition_id_attr =
+        __ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
+
+static struct kobj_attribute coherence_id_attr =
+        __ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
+
+
+static int __init sgi_uv_sysfs_init(void)
+{
+        unsigned long ret;
+
+        if (!sgi_uv_kobj)
+                sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
+        if (!sgi_uv_kobj) {
+                printk(KERN_WARNING "kobject_create_and_add sgi_uv failed \n");
+                return -EINVAL;
+        }
+
+        ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
+        if (ret) {
+                printk(KERN_WARNING "sysfs_create_file partition_id failed \n");
+                return ret;
+        }
+
+        ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
+        if (ret) {
+                printk(KERN_WARNING "sysfs_create_file coherence_id failed \n");
+                return ret;
+        }
+
+        return 0;
+}
+
+device_initcall(sgi_uv_sysfs_init);
diff --git a/include/asm-x86/uv/bios.h b/include/asm-x86/uv/bios.h
index 3b305d897c84..215f1969c266 100644
--- a/include/asm-x86/uv/bios.h
+++ b/include/asm-x86/uv/bios.h
@@ -89,5 +89,6 @@ extern long uv_coherency_id;
 extern long uv_region_size;
 #define partition_coherence_id()        (uv_coherency_id)
 
+extern struct kobject *sgi_uv_kobj;     /* /sys/firmware/sgi_uv */
 
 #endif /* ASM_X86__UV__BIOS_H */