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Subject[PATCH 4/7] x86: Add UV sysfs entries
[PATCH 4/7] x86: Add UV sysfs entries

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

Signed-off-by: Russ Anderson <rja@sgi.com>

---
arch/x86/kernel/Makefile | 2 -
arch/x86/kernel/uv_sysfs.c | 72 +++++++++++++++++++++++++++++++++++++++++++++
include/asm-x86/uv/bios.h | 1
3 files changed, 74 insertions(+), 1 deletion(-)

Index: linux/arch/x86/kernel/Makefile
===================================================================
--- linux.orig/arch/x86/kernel/Makefile 2008-10-15 09:56:10.000000000 -0500
+++ linux/arch/x86/kernel/Makefile 2008-10-15 09:56:26.000000000 -0500
@@ -107,7 +107,7 @@ obj-$(CONFIG_OLPC) += olpc.o
# 64 bit specific files
ifeq ($(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
+ obj-y += bios_uv.o uv_sysfs.o
obj-y += genx2apic_cluster.o
obj-y += genx2apic_phys.o
obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o
Index: linux/arch/x86/kernel/uv_sysfs.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux/arch/x86/kernel/uv_sysfs.c 2008-10-15 09:56:26.000000000 -0500
@@ -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);
Index: linux/include/asm-x86/uv/bios.h
===================================================================
--- linux.orig/include/asm-x86/uv/bios.h 2008-10-15 09:56:25.000000000 -0500
+++ linux/include/asm-x86/uv/bios.h 2008-10-15 09:56:26.000000000 -0500
@@ -89,5 +89,6 @@ extern long sn_coherency_id;
extern long sn_region_size;
#define partition_coherence_id() (sn_coherency_id)

+extern struct kobject *sgi_uv_kobj; /* /sys/firmware/sgi_uv */

#endif /* ASM_X86__UV__BIOS_H */
--
Russ Anderson, OS RAS/Partitioning Project Lead
SGI - Silicon Graphics Inc rja@sgi.com

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