1 files changed, 151 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/rpadlpar_sysfs.c b/drivers/pci/hotplug/rpadlpar_sysfs.c
new file mode 100644
index 000000000000..3285b822478d
--- /dev/null
+++ b/drivers/pci/hotplug/rpadlpar_sysfs.c
@@ -0,0 +1,151 @@
+/*
+ * Interface for Dynamic Logical Partitioning of I/O Slots on
+ * RPA-compliant PPC64 platform.
+ *
+ * John Rose <johnrose@austin.ibm.com>
+ * October 2003
+ *
+ * Copyright (C) 2003 IBM.
+ *
+ *      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.
+ */
+#include <linux/kobject.h>
+#include <linux/string.h>
+#include "pci_hotplug.h"
+#include "rpadlpar.h"
+
+#define DLPAR_KOBJ_NAME       "control"
+#define ADD_SLOT_ATTR_NAME    "add_slot"
+#define REMOVE_SLOT_ATTR_NAME "remove_slot"
+
+#define MAX_DRC_NAME_LEN 64
+
+/* Store return code of dlpar operation in attribute struct */
+struct dlpar_io_attr {
+        int rc;
+        struct attribute attr;
+        ssize_t (*store)(struct dlpar_io_attr *dlpar_attr, const char *buf,
+                size_t nbytes);
+};
+
+/* Common show callback for all attrs, display the return code
+ * of the dlpar op */
+static ssize_t
+dlpar_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
+{
+        struct dlpar_io_attr *dlpar_attr = container_of(attr,
+                                                struct dlpar_io_attr, attr);
+        return sprintf(buf, "%d\n", dlpar_attr->rc);
+}
+
+static ssize_t
+dlpar_attr_store(struct kobject * kobj, struct attribute * attr,
+                 const char *buf, size_t nbytes)
+{
+        struct dlpar_io_attr *dlpar_attr = container_of(attr,
+                                                struct dlpar_io_attr, attr);
+        return dlpar_attr->store ?
+                dlpar_attr->store(dlpar_attr, buf, nbytes) : 0;
+}
+
+static struct sysfs_ops dlpar_attr_sysfs_ops = {
+        .show = dlpar_attr_show,
+        .store = dlpar_attr_store,
+};
+
+static ssize_t add_slot_store(struct dlpar_io_attr *dlpar_attr,
+                                const char *buf, size_t nbytes)
+{
+        char drc_name[MAX_DRC_NAME_LEN];
+        char *end;
+
+        if (nbytes > MAX_DRC_NAME_LEN)
+                return 0;
+
+        memcpy(drc_name, buf, nbytes);
+
+        end = strchr(drc_name, '\n');
+        if (!end)
+                end = &drc_name[nbytes];
+        *end = '\0';
+
+        dlpar_attr->rc = dlpar_add_slot(drc_name);
+
+        return nbytes;
+}
+
+static ssize_t remove_slot_store(struct dlpar_io_attr *dlpar_attr,
+                                const char *buf, size_t nbytes)
+{
+        char drc_name[MAX_DRC_NAME_LEN];
+        char *end;
+
+        if (nbytes > MAX_DRC_NAME_LEN)
+                return 0;
+
+        memcpy(drc_name, buf, nbytes);
+
+        end = strchr(drc_name, '\n');
+        if (!end)
+                end = &drc_name[nbytes];
+        *end = '\0';
+
+        dlpar_attr->rc = dlpar_remove_slot(drc_name);
+
+        return nbytes;
+}
+
+static struct dlpar_io_attr add_slot_attr = {
+        .rc = 0,
+        .attr = { .name = ADD_SLOT_ATTR_NAME, .mode = 0644, },
+        .store = add_slot_store,
+};
+
+static struct dlpar_io_attr remove_slot_attr = {
+        .rc = 0,
+        .attr = { .name = REMOVE_SLOT_ATTR_NAME, .mode = 0644},
+        .store = remove_slot_store,
+};
+
+static struct attribute *default_attrs[] = {
+        &add_slot_attr.attr,
+        &remove_slot_attr.attr,
+        NULL,
+};
+
+static void dlpar_io_release(struct kobject *kobj)
+{
+        /* noop */
+        return;
+}
+
+struct kobj_type ktype_dlpar_io = {
+        .release = dlpar_io_release,
+        .sysfs_ops = &dlpar_attr_sysfs_ops,
+        .default_attrs = default_attrs,
+};
+
+struct kset dlpar_io_kset = {
+        .subsys = &pci_hotplug_slots_subsys,
+        .kobj = {.name = DLPAR_KOBJ_NAME, .ktype=&ktype_dlpar_io,},
+        .ktype = &ktype_dlpar_io,
+};
+
+int dlpar_sysfs_init(void)
+{
+        if (kset_register(&dlpar_io_kset)) {
+                printk(KERN_ERR "rpadlpar_io: cannot register kset for %s\n",
+                                dlpar_io_kset.kobj.name);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+void dlpar_sysfs_exit(void)
+{
+        kset_unregister(&dlpar_io_kset);
+}