[mirror_ubuntu-zesty-kernel.git] / drivers / pci / hotplug / rpadlpar_sysfs.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 <linux/pci.h>
#include <linux/pci_hotplug.h>
#include "rpadlpar.h"
#include "../pci.h"

#define DLPAR_KOBJ_NAME       "control"

/* Those two have no quotes because they are passed to __ATTR() which
 * stringifies the argument (yuck !)
 */
#define ADD_SLOT_ATTR_NAME    add_slot
#define REMOVE_SLOT_ATTR_NAME remove_slot

#define MAX_DRC_NAME_LEN 64

static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr,
			      const char *buf, size_t nbytes)
{
	char drc_name[MAX_DRC_NAME_LEN];
	char *end;
	int rc;

	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';

	rc = dlpar_add_slot(drc_name);
	if (rc)
		return rc;

	return nbytes;
}

static ssize_t add_slot_show(struct kobject *kobj,
			     struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "0\n");
}

static ssize_t remove_slot_store(struct kobject *kobj,
				 struct kobj_attribute *attr,
				 const char *buf, size_t nbytes)
{
	char drc_name[MAX_DRC_NAME_LEN];
	int rc;
	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';

	rc = dlpar_remove_slot(drc_name);
	if (rc)
		return rc;

	return nbytes;
}

static ssize_t remove_slot_show(struct kobject *kobj,
				struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "0\n");
}

static struct kobj_attribute add_slot_attr =
	__ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store);

static struct kobj_attribute remove_slot_attr =
	__ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store);

static struct attribute *default_attrs[] = {
	&add_slot_attr.attr,
	&remove_slot_attr.attr,
	NULL,
};

static struct attribute_group dlpar_attr_group = {
	.attrs = default_attrs,
};

static struct kobject *dlpar_kobj;

int dlpar_sysfs_init(void)
{
	int error;

	dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME,
					    &pci_slots_kset->kobj);
	if (!dlpar_kobj)
		return -EINVAL;

	error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group);
	if (error)
		kobject_put(dlpar_kobj);
	return error;
}

void dlpar_sysfs_exit(void)
{
	sysfs_remove_group(dlpar_kobj, &dlpar_attr_group);
	kobject_put(dlpar_kobj);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Interface for Dynamic Logical Partitioning of I/O Slots on
	3	* RPA-compliant PPC64 platform.
	4	*
	5	* John Rose <johnrose@austin.ibm.com>
	6	* October 2003
	7	*
	8	* Copyright (C) 2003 IBM.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15	#include <linux/kobject.h>
	16	#include <linux/string.h>
f46753c5	17	#include <linux/pci.h>
7a54f25c	18	#include <linux/pci_hotplug.h>
1da177e4	19	#include "rpadlpar.h"
f46753c5	20	#include "../pci.h"
1da177e4 LT	21
1da177e4 LT	22	#define DLPAR_KOBJ_NAME "control"
a9b841e1 BH	23
	24	/* Those two have no quotes because they are passed to __ATTR() which
	25	* stringifies the argument (yuck !)
	26	*/
	27	#define ADD_SLOT_ATTR_NAME add_slot
	28	#define REMOVE_SLOT_ATTR_NAME remove_slot
1da177e4 LT	29
	30	#define MAX_DRC_NAME_LEN 64
	31
f55842f2 GKH	32	static ssize_t add_slot_store(struct kobject kobj, struct kobj_attribute attr,
f55842f2 GKH	33	const char *buf, size_t nbytes)
1da177e4 LT	34	{
	35	char drc_name[MAX_DRC_NAME_LEN];
	36	char *end;
f55842f2	37	int rc;
1da177e4	38
02fe75a9	39	if (nbytes >= MAX_DRC_NAME_LEN)
1da177e4 LT	40	return 0;
	41
	42	memcpy(drc_name, buf, nbytes);
	43
	44	end = strchr(drc_name, '\n');
	45	if (!end)
	46	end = &drc_name[nbytes];
	47	*end = '\0';
	48
f55842f2 GKH	49	rc = dlpar_add_slot(drc_name);
	50	if (rc)
	51	return rc;
1da177e4 LT	52
	53	return nbytes;
	54	}
	55
f55842f2 GKH	56	static ssize_t add_slot_show(struct kobject *kobj,
	57	struct kobj_attribute attr, char buf)
	58	{
	59	return sprintf(buf, "0\n");
	60	}
	61
	62	static ssize_t remove_slot_store(struct kobject *kobj,
	63	struct kobj_attribute *attr,
	64	const char *buf, size_t nbytes)
1da177e4 LT	65	{
1da177e4 LT	66	char drc_name[MAX_DRC_NAME_LEN];
f55842f2	67	int rc;
1da177e4 LT	68	char *end;
1da177e4 LT	69
02fe75a9	70	if (nbytes >= MAX_DRC_NAME_LEN)
1da177e4 LT	71	return 0;
	72
	73	memcpy(drc_name, buf, nbytes);
	74
	75	end = strchr(drc_name, '\n');
	76	if (!end)
	77	end = &drc_name[nbytes];
	78	*end = '\0';
	79
f55842f2 GKH	80	rc = dlpar_remove_slot(drc_name);
	81	if (rc)
	82	return rc;
1da177e4 LT	83
	84	return nbytes;
	85	}
	86
f55842f2 GKH	87	static ssize_t remove_slot_show(struct kobject *kobj,
	88	struct kobj_attribute attr, char buf)
	89	{
	90	return sprintf(buf, "0\n");
	91	}
1da177e4	92
f55842f2 GKH	93	static struct kobj_attribute add_slot_attr =
	94	__ATTR(ADD_SLOT_ATTR_NAME, 0644, add_slot_show, add_slot_store);
	95
	96	static struct kobj_attribute remove_slot_attr =
	97	__ATTR(REMOVE_SLOT_ATTR_NAME, 0644, remove_slot_show, remove_slot_store);
1da177e4 LT	98
	99	static struct attribute *default_attrs[] = {
	100	&add_slot_attr.attr,
	101	&remove_slot_attr.attr,
	102	NULL,
	103	};
	104
f55842f2 GKH	105	static struct attribute_group dlpar_attr_group = {
f55842f2 GKH	106	.attrs = default_attrs,
1da177e4 LT	107	};
1da177e4 LT	108
f55842f2	109	static struct kobject *dlpar_kobj;
1da177e4 LT	110
	111	int dlpar_sysfs_init(void)
	112	{
f55842f2 GKH	113	int error;
	114
	115	dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME,
f46753c5	116	&pci_slots_kset->kobj);
f55842f2	117	if (!dlpar_kobj)
1da177e4	118	return -EINVAL;
1da177e4	119
f55842f2 GKH	120	error = sysfs_create_group(dlpar_kobj, &dlpar_attr_group);
f55842f2 GKH	121	if (error)
c10997f6	122	kobject_put(dlpar_kobj);
f55842f2	123	return error;
1da177e4 LT	124	}
	125
	126	void dlpar_sysfs_exit(void)
	127	{
f55842f2	128	sysfs_remove_group(dlpar_kobj, &dlpar_attr_group);
c10997f6	129	kobject_put(dlpar_kobj);
1da177e4	130	}