152 строки
3.4 KiB
C
152 строки
3.4 KiB
C
/*
|
|
* 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) : -EIO;
|
|
}
|
|
|
|
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);
|
|
}
|