/*
* linux/drivers/s390/scsi/zfcp_sysfs_driver.c
*
* FCP adapter driver for IBM eServer zSeries
*
* sysfs driver related routines
*
* (C) Copyright IBM Corp. 2003, 2004
*
* Authors:
* Martin Peschke <mpeschke@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
* Andreas Herrmann <aherrman@de.ibm.com>
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "zfcp_ext.h"
#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
/**
* ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes
* @_name: name of attribute
* @_define: name of ZFCP loglevel define
*
* Generates store function for a sysfs loglevel attribute of zfcp driver.
*/
#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define) \
static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \
const char *buf, \
size_t count) \
{ \
unsigned int loglevel; \
unsigned int new_loglevel; \
char *endp; \
\
new_loglevel = simple_strtoul(buf, &endp, 0); \
if ((endp + 1) < (buf + count)) \
return -EINVAL; \
if (new_loglevel > 3) \
return -EINVAL; \
down(&zfcp_data.config_sema); \
loglevel = atomic_read(&zfcp_data.loglevel); \
loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2)); \
loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2); \
atomic_set(&zfcp_data.loglevel, loglevel); \
up(&zfcp_data.config_sema); \
return count; \
} \
\
static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev, \
char *buf) \
{ \
return sprintf(buf,"%d\n", (unsigned int) \
ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define)); \
} \
\
static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO, \
zfcp_sysfs_loglevel_##_name##_show, \
zfcp_sysfs_loglevel_##_name##_store);
ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
ZFCP_DEFINE_DRIVER_ATTR(fc, FC);
static ssize_t zfcp_sysfs_version_show(struct device_driver *dev,
char *buf)
{
return sprintf(buf, "%s\n", zfcp_data.driver_version);
}
static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);
static struct attribute *zfcp_driver_attrs[] = {
&driver_attr_loglevel_other.attr,
&driver_attr_loglevel_scsi.attr,
&driver_attr_loglevel_fsf.attr,
&driver_attr_loglevel_config.attr,
&driver_attr_loglevel_cio.attr,
&driver_attr_loglevel_qdio.attr,
&driver_attr_loglevel_erp.attr,
&driver_attr_loglevel_fc.attr,
&driver_attr_version.attr,
NULL
};
static struct attribute_group zfcp_driver_attr_group = {
.attrs = zfcp_driver_attrs,
};
/**
* zfcp_sysfs_create_driver_files - create sysfs driver files
* @dev: pointer to belonging device
*
* Create all sysfs attributes of the zfcp device driver
*/
int
zfcp_sysfs_driver_create_files(struct device_driver *drv)
{
return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group);
}
/**
* zfcp_sysfs_remove_driver_files - remove sysfs driver files
* @dev: pointer to belonging device
*
* Remove all sysfs attributes of the zfcp device driver
*/
void
zfcp_sysfs_driver_remove_files(struct device_driver *drv)
{
sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group);
}
#undef ZFCP_LOG_AREA
