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[S390] sclp: sysfs interface for SCLP cpi

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Signed-off-by: Michael Ernst <mernst@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Ernst 2008-01-26 14:10:55 +01:00 committed by Martin Schwidefsky
parent dfa77f611f
commit c05ffc4f2b
4 changed files with 432 additions and 231 deletions
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2
drivers/s390/char/Makefile
View file

@ -3,7 +3,7 @@
#
obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
sclp_info.o sclp_config.o sclp_chp.o
sclp_info.o sclp_config.o sclp_chp.o sclp_cpi_sys.o
obj-$(CONFIG_TN3270) += raw3270.o
obj-$(CONFIG_TN3270_CONSOLE) += con3270.o

246
drivers/s390/char/sclp_cpi.c
View file

@ -1,255 +1,41 @@
/*
* Author: Martin Peschke <mpeschke@de.ibm.com>
* Copyright (C) 2001 IBM Entwicklung GmbH, IBM Corporation
* drivers/s390/char/sclp_cpi.c
* SCLP control programm identification
*
* SCLP Control-Program Identification.
* Copyright IBM Corp. 2001, 2007
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Michael Ernst <mernst@de.ibm.com>
*/
#include <linux/version.h>
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <asm/ebcdic.h>
#include <asm/semaphore.h>
#include "sclp.h"
#include "sclp_rw.h"
#define CPI_LENGTH_SYSTEM_TYPE 8
#define CPI_LENGTH_SYSTEM_NAME 8
#define CPI_LENGTH_SYSPLEX_NAME 8
struct cpi_evbuf {
struct evbuf_header header;
u8 id_format;
u8 reserved0;
u8 system_type[CPI_LENGTH_SYSTEM_TYPE];
u64 reserved1;
u8 system_name[CPI_LENGTH_SYSTEM_NAME];
u64 reserved2;
u64 system_level;
u64 reserved3;
u8 sysplex_name[CPI_LENGTH_SYSPLEX_NAME];
u8 reserved4[16];
} __attribute__((packed));
struct cpi_sccb {
struct sccb_header header;
struct cpi_evbuf cpi_evbuf;
} __attribute__((packed));
/* Event type structure for write message and write priority message */
static struct sclp_register sclp_cpi_event =
{
.send_mask = EVTYP_CTLPROGIDENT_MASK
};
#include <linux/version.h>
#include "sclp_cpi_sys.h"
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Identify this operating system instance "
"to the System z hardware");
MODULE_AUTHOR("Martin Peschke <mpeschke@de.ibm.com>, "
"Michael Ernst <mernst@de.ibm.com>");
MODULE_AUTHOR(
"Martin Peschke, IBM Deutschland Entwicklung GmbH "
"<mpeschke@de.ibm.com>");
static char *system_name = "";
static char *sysplex_name = "";
MODULE_DESCRIPTION(
"identify this operating system instance to the S/390 "
"or zSeries hardware");
static char *system_name = NULL;
module_param(system_name, charp, 0);
MODULE_PARM_DESC(system_name, "e.g. hostname - max. 8 characters");
static char *sysplex_name = NULL;
#ifdef ALLOW_SYSPLEX_NAME
module_param(sysplex_name, charp, 0);
MODULE_PARM_DESC(sysplex_name, "if applicable - max. 8 characters");
#endif
/* use default value for this field (as well as for system level) */
static char *system_type = "LINUX";
static int
cpi_check_parms(void)
static int __init cpi_module_init(void)
{
/* reject if no system type specified */
if (!system_type) {
printk("cpi: bug: no system type specified\n");
return -EINVAL;
}
/* reject if system type larger than 8 characters */
if (strlen(system_type) > CPI_LENGTH_SYSTEM_NAME) {
printk("cpi: bug: system type has length of %li characters - "
"only %i characters supported\n",
strlen(system_type), CPI_LENGTH_SYSTEM_TYPE);
return -EINVAL;
}
/* reject if no system name specified */
if (!system_name) {
printk("cpi: no system name specified\n");
return -EINVAL;
}
/* reject if system name larger than 8 characters */
if (strlen(system_name) > CPI_LENGTH_SYSTEM_NAME) {
printk("cpi: system name has length of %li characters - "
"only %i characters supported\n",
strlen(system_name), CPI_LENGTH_SYSTEM_NAME);
return -EINVAL;
}
/* reject if specified sysplex name larger than 8 characters */
if (sysplex_name && strlen(sysplex_name) > CPI_LENGTH_SYSPLEX_NAME) {
printk("cpi: sysplex name has length of %li characters"
" - only %i characters supported\n",
strlen(sysplex_name), CPI_LENGTH_SYSPLEX_NAME);
return -EINVAL;
}
return 0;
return sclp_cpi_set_data(system_name, sysplex_name, "LINUX",
LINUX_VERSION_CODE);
}
static void
cpi_callback(struct sclp_req *req, void *data)
{
struct semaphore *sem;
sem = (struct semaphore *) data;
up(sem);
}
static struct sclp_req *
cpi_prepare_req(void)
{
struct sclp_req *req;
struct cpi_sccb *sccb;
struct cpi_evbuf *evb;
req = kmalloc(sizeof(struct sclp_req), GFP_KERNEL);
if (req == NULL)
return ERR_PTR(-ENOMEM);
sccb = (struct cpi_sccb *) __get_free_page(GFP_KERNEL | GFP_DMA);
if (sccb == NULL) {
kfree(req);
return ERR_PTR(-ENOMEM);
}
memset(sccb, 0, sizeof(struct cpi_sccb));
/* 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 */
memset(evb->system_type, ' ', CPI_LENGTH_SYSTEM_TYPE);
memcpy(evb->system_type, system_type, strlen(system_type));
sclp_ascebc_str(evb->system_type, CPI_LENGTH_SYSTEM_TYPE);
EBC_TOUPPER(evb->system_type, CPI_LENGTH_SYSTEM_TYPE);
/* set system name */
memset(evb->system_name, ' ', CPI_LENGTH_SYSTEM_NAME);
memcpy(evb->system_name, system_name, strlen(system_name));
sclp_ascebc_str(evb->system_name, CPI_LENGTH_SYSTEM_NAME);
EBC_TOUPPER(evb->system_name, CPI_LENGTH_SYSTEM_NAME);
/* set system level */
evb->system_level = LINUX_VERSION_CODE;
/* set sysplex name */
if (sysplex_name) {
memset(evb->sysplex_name, ' ', CPI_LENGTH_SYSPLEX_NAME);
memcpy(evb->sysplex_name, sysplex_name, strlen(sysplex_name));
sclp_ascebc_str(evb->sysplex_name, CPI_LENGTH_SYSPLEX_NAME);
EBC_TOUPPER(evb->sysplex_name, CPI_LENGTH_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 __init
cpi_module_init(void)
{
struct semaphore sem;
struct sclp_req *req;
int rc;
rc = cpi_check_parms();
if (rc)
return rc;
rc = sclp_register(&sclp_cpi_event);
if (rc) {
/* could not register sclp event. Die. */
printk(KERN_WARNING "cpi: could not register to hardware "
"console.\n");
return -EINVAL;
}
if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) {
printk(KERN_WARNING "cpi: no control program identification "
"support\n");
sclp_unregister(&sclp_cpi_event);
return -EOPNOTSUPP;
}
req = cpi_prepare_req();
if (IS_ERR(req)) {
printk(KERN_WARNING "cpi: couldn't allocate request\n");
sclp_unregister(&sclp_cpi_event);
return PTR_ERR(req);
}
/* Prepare semaphore */
sema_init(&sem, 0);
req->callback_data = &sem;
/* Add request to sclp queue */
rc = sclp_add_request(req);
if (rc) {
printk(KERN_WARNING "cpi: could not start request\n");
cpi_free_req(req);
sclp_unregister(&sclp_cpi_event);
return rc;
}
/* make "insmod" sleep until callback arrives */
down(&sem);
rc = ((struct cpi_sccb *) req->sccb)->header.response_code;
if (rc != 0x0020) {
printk(KERN_WARNING "cpi: failed with response code 0x%x\n",
rc);
rc = -ECOMM;
} else
rc = 0;
cpi_free_req(req);
sclp_unregister(&sclp_cpi_event);
return rc;
}
static void __exit cpi_module_exit(void)
{
}
/* declare driver module init/cleanup functions */
module_init(cpi_module_init);
module_exit(cpi_module_exit);

400
drivers/s390/char/sclp_cpi_sys.c Normal file
View file

@ -0,0 +1,400 @@
/*
* 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
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) {
printk(KERN_WARNING "cpi: could not register "
"to hardware console.\n");
goto out;
}
if (!(sclp_cpi_event.sclp_send_mask & EVTYP_CTLPROGIDENT_MASK)) {
printk(KERN_WARNING "cpi: no control program "
"identification support\n");
rc = -EOPNOTSUPP;
goto out_unregister;
}
req = cpi_prepare_req();
if (IS_ERR(req)) {
printk(KERN_WARNING "cpi: could not allocate request\n");
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) {
printk(KERN_WARNING "cpi: could not start request\n");
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)
{
return snprintf(page, PAGE_SIZE, "%s\n", system_name);
}
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;
set_string(system_name, buf);
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)
{
return snprintf(page, PAGE_SIZE, "%s\n", sysplex_name);
}
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;
set_string(sysplex_name, buf);
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)
{
return snprintf(page, PAGE_SIZE, "%s\n", system_type);
}
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;
set_string(system_type, buf);
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 = system_level;
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;
system_level = level;
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;
rc = cpi_req();
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;
set_string(system_name, system);
set_string(sysplex_name, sysplex);
set_string(system_type, type);
system_level = level;
return cpi_req();
}
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);

15
drivers/s390/char/sclp_cpi_sys.h Normal file
View file

@ -0,0 +1,15 @@
/*
* drivers/s390/char/sclp_cpi_sys.h
* SCLP control program identification sysfs interface
*
* Copyright IBM Corp. 2007
* Author(s): Michael Ernst <mernst@de.ibm.com>
*/
#ifndef __SCLP_CPI_SYS_H__
#define __SCLP_CPI_SYS_H__
int sclp_cpi_set_data(const char *system, const char *sysplex,
const char *type, u64 level);
#endif /* __SCLP_CPI_SYS_H__ */