[mirror_ubuntu-artful-kernel.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>
 */

#define KMSG_COMPONENT "sclp_cpi"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#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 system 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) {
		pr_warning("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) {
		pr_warning("request 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
b3ff088b MS	10	#define KMSG_COMPONENT "sclp_cpi"
	11	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	12
c05ffc4f ME	13	#include <linux/kernel.h>
	14	#include <linux/init.h>
	15	#include <linux/stat.h>
	16	#include <linux/device.h>
	17	#include <linux/string.h>
	18	#include <linux/ctype.h>
	19	#include <linux/kmod.h>
	20	#include <linux/timer.h>
	21	#include <linux/err.h>
	22	#include <linux/slab.h>
	23	#include <linux/completion.h>
	24	#include <asm/ebcdic.h>
	25	#include <asm/sclp.h>
b3ff088b	26
c05ffc4f ME	27	#include "sclp.h"
	28	#include "sclp_rw.h"
	29	#include "sclp_cpi_sys.h"
	30
	31	#define CPI_LENGTH_NAME 8
	32	#define CPI_LENGTH_LEVEL 16
	33
b1c02d91 ME	34	static DEFINE_MUTEX(sclp_cpi_mutex);
b1c02d91 ME	35
c05ffc4f ME	36	struct cpi_evbuf {
	37	struct evbuf_header header;
	38	u8 id_format;
	39	u8 reserved0;
	40	u8 system_type[CPI_LENGTH_NAME];
	41	u64 reserved1;
	42	u8 system_name[CPI_LENGTH_NAME];
	43	u64 reserved2;
	44	u64 system_level;
	45	u64 reserved3;
	46	u8 sysplex_name[CPI_LENGTH_NAME];
	47	u8 reserved4[16];
	48	} __attribute__((packed));
	49
	50	struct cpi_sccb {
	51	struct sccb_header header;
	52	struct cpi_evbuf cpi_evbuf;
	53	} __attribute__((packed));
	54
	55	static struct sclp_register sclp_cpi_event = {
	56	.send_mask = EVTYP_CTLPROGIDENT_MASK,
	57	};
	58
	59	static char system_name[CPI_LENGTH_NAME + 1];
	60	static char sysplex_name[CPI_LENGTH_NAME + 1];
	61	static char system_type[CPI_LENGTH_NAME + 1];
	62	static u64 system_level;
	63
	64	static void set_data(char field, char data)
	65	{
	66	memset(field, ' ', CPI_LENGTH_NAME);
	67	memcpy(field, data, strlen(data));
	68	sclp_ascebc_str(field, CPI_LENGTH_NAME);
	69	}
	70
	71	static void cpi_callback(struct sclp_req req, void data)
	72	{
	73	struct completion *completion = data;
	74
	75	complete(completion);
	76	}
	77
	78	static struct sclp_req *cpi_prepare_req(void)
	79	{
	80	struct sclp_req *req;
	81	struct cpi_sccb *sccb;
	82	struct cpi_evbuf *evb;
	83
	84	req = kzalloc(sizeof(struct sclp_req), GFP_KERNEL);
	85	if (!req)
	86	return ERR_PTR(-ENOMEM);
	87	sccb = (struct cpi_sccb *) get_zeroed_page(GFP_KERNEL \| GFP_DMA);
	88	if (!sccb) {
	89	kfree(req);
	90	return ERR_PTR(-ENOMEM);
	91	}
	92
	93	/* setup SCCB for Control-Program Identification */
	94	sccb->header.length = sizeof(struct cpi_sccb);
	95	sccb->cpi_evbuf.header.length = sizeof(struct cpi_evbuf);
	96	sccb->cpi_evbuf.header.type = 0x0b;
	97	evb = &sccb->cpi_evbuf;
	98
	99	/* set system type */
100	set_data(evb->system_type, system_type);
101
102	/* set system name */
103	set_data(evb->system_name, system_name);
104
88393161	105	/* set system level */
c05ffc4f ME	106	evb->system_level = system_level;
	107
	108	/* set sysplex name */
	109	set_data(evb->sysplex_name, sysplex_name);
	110
	111	/* prepare request data structure presented to SCLP driver */
	112	req->command = SCLP_CMDW_WRITE_EVENT_DATA;
	113	req->sccb = sccb;
	114	req->status = SCLP_REQ_FILLED;
	115	req->callback = cpi_callback;
	116	return req;
	117	}
	118
	119	static void cpi_free_req(struct sclp_req *req)
	120	{
	121	free_page((unsigned long) req->sccb);
	122	kfree(req);
	123	}
	124
	125	static int cpi_req(void)
	126	{
	127	struct completion completion;
	128	struct sclp_req *req;
	129	int rc;
	130	int response;
	131
	132	rc = sclp_register(&sclp_cpi_event);
a12c53f4	133	if (rc)
c05ffc4f	134	goto out;
d082d3ce	135	if (!(sclp_cpi_event.sclp_receive_mask & EVTYP_CTLPROGIDENT_MASK)) {
c05ffc4f ME	136	rc = -EOPNOTSUPP;
	137	goto out_unregister;
	138	}
	139
	140	req = cpi_prepare_req();
	141	if (IS_ERR(req)) {
c05ffc4f ME	142	rc = PTR_ERR(req);
	143	goto out_unregister;
	144	}
	145
	146	init_completion(&completion);
	147	req->callback_data = &completion;
	148
	149	/* Add request to sclp queue */
	150	rc = sclp_add_request(req);
a12c53f4	151	if (rc)
c05ffc4f	152	goto out_free_req;
c05ffc4f ME	153
	154	wait_for_completion(&completion);
	155
	156	if (req->status != SCLP_REQ_DONE) {
b3ff088b MS	157	pr_warning("request failed (status=0x%02x)\n",
b3ff088b MS	158	req->status);
c05ffc4f ME	159	rc = -EIO;
	160	goto out_free_req;
	161	}
	162
	163	response = ((struct cpi_sccb *) req->sccb)->header.response_code;
	164	if (response != 0x0020) {
b3ff088b MS	165	pr_warning("request failed with response code 0x%x\n",
b3ff088b MS	166	response);
c05ffc4f ME	167	rc = -EIO;
	168	}
	169
	170	out_free_req:
	171	cpi_free_req(req);
	172
	173	out_unregister:
	174	sclp_unregister(&sclp_cpi_event);
	175
	176	out:
	177	return rc;
	178	}
	179
	180	static int check_string(const char attr, const char str)
	181	{
	182	size_t len;
	183	size_t i;
	184
	185	len = strlen(str);
	186
	187	if ((len > 0) && (str[len - 1] == '\n'))
	188	len--;
	189
	190	if (len > CPI_LENGTH_NAME)
	191	return -EINVAL;
	192
	193	for (i = 0; i < len ; i++) {
	194	if (isalpha(str[i]) \|\| isdigit(str[i]) \|\|
	195	strchr("$@# ", str[i]))
	196	continue;
	197	return -EINVAL;
	198	}
	199
	200	return 0;
	201	}
	202
	203	static void set_string(char attr, const char value)
	204	{
	205	size_t len;
	206	size_t i;
	207
	208	len = strlen(value);
	209
	210	if ((len > 0) && (value[len - 1] == '\n'))
	211	len--;
	212
	213	for (i = 0; i < CPI_LENGTH_NAME; i++) {
	214	if (i < len)
	215	attr[i] = toupper(value[i]);
	216	else
	217	attr[i] = ' ';
	218	}
	219	}
	220
	221	static ssize_t system_name_show(struct kobject *kobj,
	222	struct kobj_attribute attr, char page)
	223	{
b1c02d91 ME	224	int rc;
	225
	226	mutex_lock(&sclp_cpi_mutex);
	227	rc = snprintf(page, PAGE_SIZE, "%s\n", system_name);
	228	mutex_unlock(&sclp_cpi_mutex);
	229	return rc;
c05ffc4f ME	230	}
	231
	232	static ssize_t system_name_store(struct kobject *kobj,
	233	struct kobj_attribute *attr,
	234	const char *buf,
	235	size_t len)
	236	{
	237	int rc;
	238
	239	rc = check_string("system_name", buf);
	240	if (rc)
	241	return rc;
	242
b1c02d91	243	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	244	set_string(system_name, buf);
b1c02d91	245	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	246
	247	return len;
	248	}
	249
	250	static struct kobj_attribute system_name_attr =
	251	__ATTR(system_name, 0644, system_name_show, system_name_store);
	252
	253	static ssize_t sysplex_name_show(struct kobject *kobj,
	254	struct kobj_attribute attr, char page)
	255	{
b1c02d91 ME	256	int rc;
	257
	258	mutex_lock(&sclp_cpi_mutex);
	259	rc = snprintf(page, PAGE_SIZE, "%s\n", sysplex_name);
	260	mutex_unlock(&sclp_cpi_mutex);
	261	return rc;
c05ffc4f ME	262	}
	263
	264	static ssize_t sysplex_name_store(struct kobject *kobj,
	265	struct kobj_attribute *attr,
	266	const char *buf,
	267	size_t len)
	268	{
	269	int rc;
	270
	271	rc = check_string("sysplex_name", buf);
	272	if (rc)
	273	return rc;
	274
b1c02d91	275	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	276	set_string(sysplex_name, buf);
b1c02d91	277	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	278
	279	return len;
	280	}
	281
	282	static struct kobj_attribute sysplex_name_attr =
	283	__ATTR(sysplex_name, 0644, sysplex_name_show, sysplex_name_store);
	284
	285	static ssize_t system_type_show(struct kobject *kobj,
	286	struct kobj_attribute attr, char page)
	287	{
b1c02d91 ME	288	int rc;
	289
	290	mutex_lock(&sclp_cpi_mutex);
	291	rc = snprintf(page, PAGE_SIZE, "%s\n", system_type);
	292	mutex_unlock(&sclp_cpi_mutex);
	293	return rc;
c05ffc4f ME	294	}
	295
	296	static ssize_t system_type_store(struct kobject *kobj,
	297	struct kobj_attribute *attr,
	298	const char *buf,
	299	size_t len)
	300	{
	301	int rc;
	302
	303	rc = check_string("system_type", buf);
	304	if (rc)
	305	return rc;
	306
b1c02d91	307	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	308	set_string(system_type, buf);
b1c02d91	309	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	310
	311	return len;
	312	}
	313
	314	static struct kobj_attribute system_type_attr =
	315	__ATTR(system_type, 0644, system_type_show, system_type_store);
	316
	317	static ssize_t system_level_show(struct kobject *kobj,
	318	struct kobj_attribute attr, char page)
	319	{
b1c02d91	320	unsigned long long level;
c05ffc4f	321
b1c02d91 ME	322	mutex_lock(&sclp_cpi_mutex);
	323	level = system_level;
	324	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	325	return snprintf(page, PAGE_SIZE, "%#018llx\n", level);
	326	}
	327
	328	static ssize_t system_level_store(struct kobject *kobj,
	329	struct kobj_attribute *attr,
	330	const char *buf,
	331	size_t len)
	332	{
	333	unsigned long long level;
	334	char *endp;
	335
	336	level = simple_strtoull(buf, &endp, 16);
	337
	338	if (endp == buf)
	339	return -EINVAL;
	340	if (*endp == '\n')
	341	endp++;
	342	if (*endp)
	343	return -EINVAL;
	344
b1c02d91	345	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	346	system_level = level;
b1c02d91	347	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	348	return len;
	349	}
	350
	351	static struct kobj_attribute system_level_attr =
	352	__ATTR(system_level, 0644, system_level_show, system_level_store);
	353
	354	static ssize_t set_store(struct kobject *kobj,
	355	struct kobj_attribute *attr,
	356	const char *buf, size_t len)
	357	{
	358	int rc;
	359
b1c02d91	360	mutex_lock(&sclp_cpi_mutex);
c05ffc4f	361	rc = cpi_req();
b1c02d91	362	mutex_unlock(&sclp_cpi_mutex);
c05ffc4f ME	363	if (rc)
	364	return rc;
	365
	366	return len;
	367	}
	368
	369	static struct kobj_attribute set_attr = __ATTR(set, 0200, NULL, set_store);
	370
	371	static struct attribute *cpi_attrs[] = {
	372	&system_name_attr.attr,
	373	&sysplex_name_attr.attr,
	374	&system_type_attr.attr,
	375	&system_level_attr.attr,
	376	&set_attr.attr,
	377	NULL,
	378	};
	379
	380	static struct attribute_group cpi_attr_group = {
	381	.attrs = cpi_attrs,
	382	};
	383
	384	static struct kset *cpi_kset;
	385
	386	int sclp_cpi_set_data(const char system, const char sysplex, const char *type,
	387	const u64 level)
	388	{
	389	int rc;
	390
	391	rc = check_string("system_name", system);
	392	if (rc)
	393	return rc;
	394	rc = check_string("sysplex_name", sysplex);
	395	if (rc)
	396	return rc;
	397	rc = check_string("system_type", type);
	398	if (rc)
	399	return rc;
	400
b1c02d91	401	mutex_lock(&sclp_cpi_mutex);
c05ffc4f ME	402	set_string(system_name, system);
	403	set_string(sysplex_name, sysplex);
	404	set_string(system_type, type);
	405	system_level = level;
	406
b1c02d91 ME	407	rc = cpi_req();
	408	mutex_unlock(&sclp_cpi_mutex);
	409
	410	return rc;
c05ffc4f ME	411	}
	412	EXPORT_SYMBOL(sclp_cpi_set_data);
	413
	414	static int __init cpi_init(void)
	415	{
	416	int rc;
	417
	418	cpi_kset = kset_create_and_add("cpi", NULL, firmware_kobj);
	419	if (!cpi_kset)
	420	return -ENOMEM;
	421
	422	rc = sysfs_create_group(&cpi_kset->kobj, &cpi_attr_group);
	423	if (rc)
	424	kset_unregister(cpi_kset);
	425
	426	return rc;
	427	}
	428
	429	__initcall(cpi_init);