[deliverable/linux.git] / drivers / s390 / char / sclp_cpi_sys.c

/*
 *  drivers/s390/char/sclp_cpi_sys.c
 *    SCLP control program identification sysfs interface
 *
 *    Copyright IBM Corp. 2001, 2007
 *    Author(s): Martin Peschke <mpeschke@de.ibm.com>
 *		 Michael Ernst <mernst@de.ibm.com>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/stat.h>
#include <linux/device.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/kmod.h>
#include <linux/timer.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/completion.h>
#include <asm/ebcdic.h>
#include <asm/sclp.h>
#include "sclp.h"
#include "sclp_rw.h"
#include "sclp_cpi_sys.h"

#define CPI_LENGTH_NAME 8
#define CPI_LENGTH_LEVEL 16

static DEFINE_MUTEX(sclp_cpi_mutex);

struct cpi_evbuf {
	struct evbuf_header header;
	u8	id_format;
	u8	reserved0;
	u8	system_type[CPI_LENGTH_NAME];
	u64	reserved1;
	u8	system_name[CPI_LENGTH_NAME];
	u64	reserved2;
	u64	system_level;
	u64	reserved3;
	u8	sysplex_name[CPI_LENGTH_NAME];
	u8	reserved4[16];
} __attribute__((packed));

struct cpi_sccb {
	struct sccb_header header;
	struct cpi_evbuf cpi_evbuf;
} __attribute__((packed));

static struct sclp_register sclp_cpi_event = {
	.send_mask = EVTYP_CTLPROGIDENT_MASK,
};

static char system_name[CPI_LENGTH_NAME + 1];
static char sysplex_name[CPI_LENGTH_NAME + 1];
static char system_type[CPI_LENGTH_NAME + 1];
static u64 system_level;

static void set_data(char *field, char *data)
{
	memset(field, ' ', CPI_LENGTH_NAME);
	memcpy(field, data, strlen(data));
	sclp_ascebc_str(field, CPI_LENGTH_NAME);
}

static void cpi_callback(struct sclp_req *req, void *data)
{
	struct completion *completion = data;

	complete(completion);
}

static struct sclp_req *cpi_prepare_req(void)
{
	struct sclp_req *req;
	struct cpi_sccb *sccb;
	struct cpi_evbuf *evb;

	req = kzalloc(sizeof(struct sclp_req), GFP_KERNEL);
	if (!req)
		return ERR_PTR(-ENOMEM);
	sccb = (struct cpi_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
	if (!sccb) {
		kfree(req);
		return ERR_PTR(-ENOMEM);
	}

	/* setup SCCB for Control-Program Identification */
	sccb->header.length = sizeof(struct cpi_sccb);
	sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf);
	sccb->cpi_evbuf.header.type = 0x0b;
	evb = &sccb->cpi_evbuf;

	/* set system type */
	set_data(evb->system_type, system_type);

	/* set system name */
	set_data(evb->system_name, system_name);

	/* set sytem level */
	evb->system_level = system_level;

	/* set sysplex name */
	set_data(evb->sysplex_name, sysplex_name);

	/* prepare request data structure presented to SCLP driver */
	req->command = SCLP_CMDW_WRITE_EVENT_DATA;
	req->sccb = sccb;
	req->status = SCLP_REQ_FILLED;
	req->callback = cpi_callback;
	return req;
}

static void cpi_free_req(struct sclp_req *req)
{
	free_page((unsigned long) req->sccb);
	kfree(req);
}

static int cpi_req(void)
{
	struct completion completion;
	struct sclp_req *req;
	int rc;
	int response;

	rc = sclp_register(&sclp_cpi_event);
	if (rc)
		goto out;
	if (!(sclp_cpi_event.sclp_receive_mask & EVTYP_CTLPROGIDENT_MASK)) {
		rc = -EOPNOTSUPP;
		goto out_unregister;
	}

	req = cpi_prepare_req();
	if (IS_ERR(req)) {
		rc = PTR_ERR(req);
		goto out_unregister;
	}

	init_completion(&completion);
	req->callback_data = &completion;

	/* Add request to sclp queue */
	rc = sclp_add_request(req);
	if (rc)
		goto out_free_req;

	wait_for_completion(&completion);

	if (req->status != SCLP_REQ_DONE) {
		printk(KERN_WARNING "cpi: request failed (status=0x%02x)\n",
			req->status);
		rc = -EIO;
		goto out_free_req;
	}

	response = ((struct cpi_sccb *) req->sccb)->header.response_code;
	if (response != 0x0020) {
		printk(KERN_WARNING "cpi: failed with "
			"response code 0x%x\n", response);
		rc = -EIO;
	}

out_free_req:
	cpi_free_req(req);

out_unregister:
	sclp_unregister(&sclp_cpi_event);

out:
	return rc;
}

static int check_string(const char *attr, const char *str)
{
	size_t len;
	size_t i;

	len = strlen(str);

	if ((len > 0) && (str[len - 1] == '\n'))
		len--;

	if (len > CPI_LENGTH_NAME)
		return -EINVAL;

	for (i = 0; i < len ; i++) {
		if (isalpha(str[i]) || isdigit(str[i]) ||
		    strchr("$@# ", str[i]))
			continue;
		return -EINVAL;
	}

	return 0;
}

static void set_string(char *attr, const char *value)
{
	size_t len;
	size_t i;

	len = strlen(value);

	if ((len > 0) && (value[len - 1] == '\n'))
		len--;

	for (i = 0; i < CPI_LENGTH_NAME; i++) {
		if (i < len)
			attr[i] = toupper(value[i]);
		else
			attr[i] = ' ';
	}
}

static ssize_t system_name_show(struct kobject *kobj,
				struct kobj_attribute *attr, char *page)
{
	int rc;

	mutex_lock(&sclp_cpi_mutex);
	rc = snprintf(page, PAGE_SIZE, "%s\n", system_name);
	mutex_unlock(&sclp_cpi_mutex);
	return rc;
}

static ssize_t system_name_store(struct kobject *kobj,
				 struct kobj_attribute *attr,
				 const char *buf,
	size_t len)
{
	int rc;

	rc = check_string("system_name", buf);
	if (rc)
		return rc;

	mutex_lock(&sclp_cpi_mutex);
	set_string(system_name, buf);
	mutex_unlock(&sclp_cpi_mutex);

	return len;
}

static struct kobj_attribute system_name_attr =
	__ATTR(system_name, 0644, system_name_show, system_name_store);

static ssize_t sysplex_name_show(struct kobject *kobj,
				 struct kobj_attribute *attr, char *page)
{
	int rc;

	mutex_lock(&sclp_cpi_mutex);
	rc = snprintf(page, PAGE_SIZE, "%s\n", sysplex_name);
	mutex_unlock(&sclp_cpi_mutex);
	return rc;
}

static ssize_t sysplex_name_store(struct kobject *kobj,
				  struct kobj_attribute *attr,
				  const char *buf,
	size_t len)
{
	int rc;

	rc = check_string("sysplex_name", buf);
	if (rc)
		return rc;

	mutex_lock(&sclp_cpi_mutex);
	set_string(sysplex_name, buf);
	mutex_unlock(&sclp_cpi_mutex);

	return len;
}

static struct kobj_attribute sysplex_name_attr =
	__ATTR(sysplex_name, 0644, sysplex_name_show, sysplex_name_store);

static ssize_t system_type_show(struct kobject *kobj,
				struct kobj_attribute *attr, char *page)
{
	int rc;

	mutex_lock(&sclp_cpi_mutex);
	rc = snprintf(page, PAGE_SIZE, "%s\n", system_type);
	mutex_unlock(&sclp_cpi_mutex);
	return rc;
}

static ssize_t system_type_store(struct kobject *kobj,
				 struct kobj_attribute *attr,
				 const char *buf,
	size_t len)
{
	int rc;

	rc = check_string("system_type", buf);
	if (rc)
		return rc;

	mutex_lock(&sclp_cpi_mutex);
	set_string(system_type, buf);
	mutex_unlock(&sclp_cpi_mutex);

	return len;
}

static struct kobj_attribute system_type_attr =
	__ATTR(system_type, 0644, system_type_show, system_type_store);

static ssize_t system_level_show(struct kobject *kobj,
				 struct kobj_attribute *attr, char *page)
{
	unsigned long long level;

	mutex_lock(&sclp_cpi_mutex);
	level = system_level;
	mutex_unlock(&sclp_cpi_mutex);
	return snprintf(page, PAGE_SIZE, "%#018llx\n", level);
}

static ssize_t system_level_store(struct kobject *kobj,
				  struct kobj_attribute *attr,
				  const char *buf,
	size_t len)
{
	unsigned long long level;
	char *endp;

	level = simple_strtoull(buf, &endp, 16);

	if (endp == buf)
		return -EINVAL;
	if (*endp == '\n')
		endp++;
	if (*endp)
		return -EINVAL;

	mutex_lock(&sclp_cpi_mutex);
	system_level = level;
	mutex_unlock(&sclp_cpi_mutex);
	return len;
}

static struct kobj_attribute system_level_attr =
	__ATTR(system_level, 0644, system_level_show, system_level_store);

static ssize_t set_store(struct kobject *kobj,
			 struct kobj_attribute *attr,
			 const char *buf, size_t len)
{
	int rc;

	mutex_lock(&sclp_cpi_mutex);
	rc = cpi_req();
	mutex_unlock(&sclp_cpi_mutex);
	if (rc)
		return rc;

	return len;
}

static struct kobj_attribute set_attr = __ATTR(set, 0200, NULL, set_store);

static struct attribute *cpi_attrs[] = {
	&system_name_attr.attr,
	&sysplex_name_attr.attr,
	&system_type_attr.attr,
	&system_level_attr.attr,
	&set_attr.attr,
	NULL,
};

static struct attribute_group cpi_attr_group = {
	.attrs = cpi_attrs,
};

static struct kset *cpi_kset;

int sclp_cpi_set_data(const char *system, const char *sysplex, const char *type,
		      const u64 level)
{
	int rc;

	rc = check_string("system_name", system);
	if (rc)
		return rc;
	rc = check_string("sysplex_name", sysplex);
	if (rc)
		return rc;
	rc = check_string("system_type", type);
	if (rc)
		return rc;

	mutex_lock(&sclp_cpi_mutex);
	set_string(system_name, system);
	set_string(sysplex_name, sysplex);
	set_string(system_type, type);
	system_level = level;

	rc = cpi_req();
	mutex_unlock(&sclp_cpi_mutex);

	return rc;
}
EXPORT_SYMBOL(sclp_cpi_set_data);

static int __init cpi_init(void)
{
	int rc;

	cpi_kset = kset_create_and_add("cpi", NULL, firmware_kobj);
	if (!cpi_kset)
		return -ENOMEM;

	rc = sysfs_create_group(&cpi_kset->kobj, &cpi_attr_group);
	if (rc)
		kset_unregister(cpi_kset);

	return rc;
}

__initcall(cpi_init);
Commit	Line	Data
c05ffc4f ME	1	/*
	2	* drivers/s390/char/sclp_cpi_sys.c
	3	* SCLP control program identification sysfs interface
	4	*
	5	* Copyright IBM Corp. 2001, 2007
	6	* Author(s): Martin Peschke <mpeschke@de.ibm.com>
	7	* Michael Ernst <mernst@de.ibm.com>
	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/init.h>
	12	#include <linux/stat.h>
	13	#include <linux/device.h>
	14	#include <linux/string.h>
	15	#include <linux/ctype.h>
	16	#include <linux/kmod.h>
	17	#include <linux/timer.h>
	18	#include <linux/err.h>
	19	#include <linux/slab.h>
	20	#include <linux/completion.h>
	21	#include <asm/ebcdic.h>
	22	#include <asm/sclp.h>
	23	#include "sclp.h"
	24	#include "sclp_rw.h"
	25	#include "sclp_cpi_sys.h"
	26
	27	#define CPI_LENGTH_NAME 8
	28	#define CPI_LENGTH_LEVEL 16
	29
b1c02d91 ME	30	static DEFINE_MUTEX(sclp_cpi_mutex);
b1c02d91 ME	31
c05ffc4f ME	32	struct cpi_evbuf {
	33	struct evbuf_header header;
	34	u8 id_format;
	35	u8 reserved0;
	36	u8 system_type[CPI_LENGTH_NAME];
	37	u64 reserved1;
	38	u8 system_name[CPI_LENGTH_NAME];
	39	u64 reserved2;
	40	u64 system_level;
	41	u64 reserved3;
	42	u8 sysplex_name[CPI_LENGTH_NAME];
	43	u8 reserved4[16];
	44	} __attribute__((packed));
	45
	46	struct cpi_sccb {
	47	struct sccb_header header;
	48	struct cpi_evbuf cpi_evbuf;
	49	} __attribute__((packed));
	50
	51	static struct sclp_register sclp_cpi_event = {
	52	.send_mask = EVTYP_CTLPROGIDENT_MASK,
	53	};
	54
	55	static char system_name[CPI_LENGTH_NAME + 1];
	56	static char sysplex_name[CPI_LENGTH_NAME + 1];
	57	static char system_type[CPI_LENGTH_NAME + 1];
	58	static u64 system_level;
	59
	60	static void set_data(char field, char data)
	61	{
	62	memset(field, ' ', CPI_LENGTH_NAME);
	63	memcpy(field, data, strlen(data));
	64	sclp_ascebc_str(field, CPI_LENGTH_NAME);
	65	}
	66
	67	static void cpi_callback(struct sclp_req req, void data)
	68	{
	69	struct completion *completion = data;
	70
	71	complete(completion);
	72	}
	73
	74	static struct sclp_req *cpi_prepare_req(void)
	75	{
	76	struct sclp_req *req;
	77	struct cpi_sccb *sccb;
	78	struct cpi_evbuf *evb;
	79
	80	req = kzalloc(sizeof(struct sclp_req), GFP_KERNEL);
	81	if (!req)
	82	return ERR_PTR(-ENOMEM);
	83	sccb = (struct cpi_sccb *) get_zeroed_page(GFP_KERNEL \| GFP_DMA);
	84	if (!sccb) {
	85	kfree(req);
	86	return ERR_PTR(-ENOMEM);
	87	}
	88
	89	/* setup SCCB for Control-Program Identification */
	90	sccb->header.length = sizeof(struct cpi_sccb);
	91	sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf);
	92	sccb->cpi_evbuf.header.type = 0x0b;
	93	evb = &sccb->cpi_evbuf;
	94
	95	/* set system type */
96	set_data(evb->system_type, system_type);
97
98	/* set system name */
99	set_data(evb->system_name, system_name);
100
101	/* set sytem level */
102	evb->system_level = system_level;
103
104	/* set sysplex name */
105	set_data(evb->sysplex_name, sysplex_name);
106
107	/* prepare request data structure presented to SCLP driver */
108	req->command = SCLP_CMDW_WRITE_EVENT_DATA;
109	req->sccb = sccb;
110	req->status = SCLP_REQ_FILLED;
111	req->callback = cpi_callback;
112	return req;
113	}
114
115	static void cpi_free_req(struct sclp_req *req)
116	{
117	free_page((unsigned long) req->sccb);
118	kfree(req);
119	}
120
121	static int cpi_req(void)
122	{
123	struct completion completion;
124	struct sclp_req *req;
125	int rc;
126	int response;
127
128	rc = sclp_register(&sclp_cpi_event);
a12c53f4	129	if (rc)
c05ffc4f	130	goto out;
d082d3ce	131	if (!(sclp_cpi_event.sclp_receive_mask & EVTYP_CTLPROGIDENT_MASK)) {
c05ffc4f ME	132	rc = -EOPNOTSUPP;
	133	goto out_unregister;
	134	}
	135
	136	req = cpi_prepare_req();
	137	if (IS_ERR(req)) {
c05ffc4f ME	138	rc = PTR_ERR(req);
	139	goto out_unregister;
	140	}
	141
	142	init_completion(&completion);
	143	req->callback_data = &completion;
	144
	145	/* Add request to sclp queue */
	146	rc = sclp_add_request(req);
a12c53f4	147	if (rc)
c05ffc4f	148	goto out_free_req;
c05ffc4f ME	149
	150	wait_for_completion(&completion);
	151
	152	if (req->status != SCLP_REQ_DONE) {
	153	printk(KERN_WARNING "cpi: request failed (status=0x%02x)\n",
	154	req->status);
	155	rc = -EIO;
	156	goto out_free_req;
	157	}
	158
	159	response = ((struct cpi_sccb *) req->sccb)->header.response_code;
	160	if (response != 0x0020) {
	161	printk(KERN_WARNING "cpi: failed with "
	162	"response code 0x%x\n", response);
	163	rc = -EIO;
	164	}
	165
	166	out_free_req:
	167	cpi_free_req(req);
	168
	169	out_unregister:
	170	sclp_unregister(&sclp_cpi_event);
	171
	172	out:
	173	return rc;
	174	}
	175
	176	static int check_string(const char attr, const char str)
	177	{
	178	size_t len;
	179	size_t i;
	180
	181	len = strlen(str);
	182
	183	if ((len > 0) && (str[len - 1] == '\n'))
	184	len--;
	185
	186	if (len > CPI_LENGTH_NAME)
	187	return -EINVAL;
	188
	189	for (i = 0; i < len ; i++) {
	190	if (isalpha(str[i]) \|\| isdigit(str[i]) \|\|
	191	strchr("$@# ", str[i]))
	192	continue;
	193	return -EINVAL;
	194	}
	195
	196	return 0;
	197	}
	198
	199	static void set_string(char attr, const char value)
	200	{
	201	size_t len;
	202	size_t i;
	203
	204	len = strlen(value);
	205
	206	if ((len > 0) && (value[len - 1] == '\n'))
	207	len--;
	208
	209	for (i = 0; i < CPI_LENGTH_NAME; i++) {
	210	if (i < len)
	211	attr[i] = toupper(value[i]);
	212	else
213	attr[i] = ' ';
214	}
215	}
216
217	static ssize_t system_name_show(struct kobject *kobj,
218	struct kobj_attribute attr, char page)
219	{
b1c02d91 ME	220	int rc;
	221
	222	mutex_lock(&sclp_cpi_mutex);
	223	rc = snprintf(page, PAGE_SIZE, "%s\n", system_name);
	224	mutex_unlock(&sclp_cpi_mutex);
	225	return rc;
c05ffc4f ME	226	}
	227
	228	static ssize_t system_name_store(struct kobject *kobj,
	229	struct kobj_attribute *attr,
	230	const char *buf,
	231	size_t len)
	232	{
	233	int rc;
	234
	235	rc = check_string("system_name", buf);
	236	if (rc)
	237	return rc;
	238
b1c02d91	239	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	240	set_string(system_name, buf);
b1c02d91	241	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	242
	243	return len;
	244	}
	245
	246	static struct kobj_attribute system_name_attr =
	247	__ATTR(system_name, 0644, system_name_show, system_name_store);
	248
	249	static ssize_t sysplex_name_show(struct kobject *kobj,
	250	struct kobj_attribute attr, char page)
	251	{
b1c02d91 ME	252	int rc;
	253
	254	mutex_lock(&sclp_cpi_mutex);
	255	rc = snprintf(page, PAGE_SIZE, "%s\n", sysplex_name);
	256	mutex_unlock(&sclp_cpi_mutex);
	257	return rc;
c05ffc4f ME	258	}
	259
	260	static ssize_t sysplex_name_store(struct kobject *kobj,
	261	struct kobj_attribute *attr,
	262	const char *buf,
	263	size_t len)
	264	{
	265	int rc;
	266
	267	rc = check_string("sysplex_name", buf);
	268	if (rc)
	269	return rc;
	270
b1c02d91	271	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	272	set_string(sysplex_name, buf);
b1c02d91	273	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	274
	275	return len;
	276	}
	277
	278	static struct kobj_attribute sysplex_name_attr =
	279	__ATTR(sysplex_name, 0644, sysplex_name_show, sysplex_name_store);
	280
	281	static ssize_t system_type_show(struct kobject *kobj,
	282	struct kobj_attribute attr, char page)
	283	{
b1c02d91 ME	284	int rc;
	285
	286	mutex_lock(&sclp_cpi_mutex);
	287	rc = snprintf(page, PAGE_SIZE, "%s\n", system_type);
	288	mutex_unlock(&sclp_cpi_mutex);
	289	return rc;
c05ffc4f ME	290	}
	291
	292	static ssize_t system_type_store(struct kobject *kobj,
	293	struct kobj_attribute *attr,
	294	const char *buf,
	295	size_t len)
	296	{
	297	int rc;
	298
	299	rc = check_string("system_type", buf);
	300	if (rc)
	301	return rc;
	302
b1c02d91	303	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	304	set_string(system_type, buf);
b1c02d91	305	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	306
	307	return len;
	308	}
	309
	310	static struct kobj_attribute system_type_attr =
	311	__ATTR(system_type, 0644, system_type_show, system_type_store);
	312
	313	static ssize_t system_level_show(struct kobject *kobj,
	314	struct kobj_attribute attr, char page)
	315	{
b1c02d91	316	unsigned long long level;
c05ffc4f	317
b1c02d91 ME	318	mutex_lock(&sclp_cpi_mutex);
	319	level = system_level;
	320	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	321	return snprintf(page, PAGE_SIZE, "%#018llx\n", level);
	322	}
	323
	324	static ssize_t system_level_store(struct kobject *kobj,
	325	struct kobj_attribute *attr,
	326	const char *buf,
	327	size_t len)
	328	{
	329	unsigned long long level;
	330	char *endp;
	331
	332	level = simple_strtoull(buf, &endp, 16);
	333
	334	if (endp == buf)
	335	return -EINVAL;
	336	if (*endp == '\n')
	337	endp++;
	338	if (*endp)
	339	return -EINVAL;
	340
b1c02d91	341	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	342	system_level = level;
b1c02d91	343	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	344	return len;
	345	}
	346
	347	static struct kobj_attribute system_level_attr =
	348	__ATTR(system_level, 0644, system_level_show, system_level_store);
	349
	350	static ssize_t set_store(struct kobject *kobj,
	351	struct kobj_attribute *attr,
	352	const char *buf, size_t len)
	353	{
	354	int rc;
	355
b1c02d91	356	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	357	rc = cpi_req();
b1c02d91	358	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	359	if (rc)
	360	return rc;
	361
	362	return len;
	363	}
	364
	365	static struct kobj_attribute set_attr = __ATTR(set, 0200, NULL, set_store);
	366
	367	static struct attribute *cpi_attrs[] = {
	368	&system_name_attr.attr,
	369	&sysplex_name_attr.attr,
	370	&system_type_attr.attr,
	371	&system_level_attr.attr,
	372	&set_attr.attr,
	373	NULL,
	374	};
	375
	376	static struct attribute_group cpi_attr_group = {
	377	.attrs = cpi_attrs,
	378	};
	379
	380	static struct kset *cpi_kset;
	381
	382	int sclp_cpi_set_data(const char system, const char sysplex, const char *type,
	383	const u64 level)
	384	{
	385	int rc;
	386
	387	rc = check_string("system_name", system);
	388	if (rc)
	389	return rc;
	390	rc = check_string("sysplex_name", sysplex);
	391	if (rc)
	392	return rc;
	393	rc = check_string("system_type", type);
	394	if (rc)
	395	return rc;
	396
b1c02d91	397	mutex_lock(&sclp_cpi_mutex);
c05ffc4f ME	398	set_string(system_name, system);
	399	set_string(sysplex_name, sysplex);
	400	set_string(system_type, type);
	401	system_level = level;
	402
b1c02d91 ME	403	rc = cpi_req();
	404	mutex_unlock(&sclp_cpi_mutex);
	405
	406	return rc;
c05ffc4f ME	407	}
	408	EXPORT_SYMBOL(sclp_cpi_set_data);
	409
	410	static int __init cpi_init(void)
	411	{
	412	int rc;
	413
	414	cpi_kset = kset_create_and_add("cpi", NULL, firmware_kobj);
	415	if (!cpi_kset)
	416	return -ENOMEM;
	417
	418	rc = sysfs_create_group(&cpi_kset->kobj, &cpi_attr_group);
	419	if (rc)
	420	kset_unregister(cpi_kset);
	421
	422	return rc;
	423	}
	424
	425	__initcall(cpi_init);