136 lines
5.2 KiB
C
136 lines
5.2 KiB
C
/*
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* linux/drivers/s390/scsi/zfcp_sysfs_driver.c
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*
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* FCP adapter driver for IBM eServer zSeries
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*
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* sysfs driver related routines
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*
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* (C) Copyright IBM Corp. 2003, 2004
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*
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* Authors:
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* Martin Peschke <mpeschke@de.ibm.com>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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* Andreas Herrmann <aherrman@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define ZFCP_SYSFS_DRIVER_C_REVISION "$Revision: 1.17 $"
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#include "zfcp_ext.h"
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#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
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/**
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* ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes
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* @_name: name of attribute
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* @_define: name of ZFCP loglevel define
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*
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* Generates store function for a sysfs loglevel attribute of zfcp driver.
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*/
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#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define) \
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static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \
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const char *buf, \
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size_t count) \
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{ \
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unsigned int loglevel; \
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unsigned int new_loglevel; \
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char *endp; \
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\
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new_loglevel = simple_strtoul(buf, &endp, 0); \
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if ((endp + 1) < (buf + count)) \
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return -EINVAL; \
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if (new_loglevel > 3) \
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return -EINVAL; \
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down(&zfcp_data.config_sema); \
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loglevel = atomic_read(&zfcp_data.loglevel); \
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loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2)); \
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loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2); \
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atomic_set(&zfcp_data.loglevel, loglevel); \
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up(&zfcp_data.config_sema); \
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return count; \
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} \
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\
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static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev, \
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char *buf) \
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{ \
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return sprintf(buf,"%d\n", (unsigned int) \
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ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define)); \
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} \
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\
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static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO, \
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zfcp_sysfs_loglevel_##_name##_show, \
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zfcp_sysfs_loglevel_##_name##_store);
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ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
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ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
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ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
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ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
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ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
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ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
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ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
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ZFCP_DEFINE_DRIVER_ATTR(fc, FC);
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static ssize_t zfcp_sysfs_version_show(struct device_driver *dev,
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char *buf)
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{
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return sprintf(buf, "%s\n", zfcp_data.driver_version);
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}
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static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);
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static struct attribute *zfcp_driver_attrs[] = {
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&driver_attr_loglevel_other.attr,
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&driver_attr_loglevel_scsi.attr,
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&driver_attr_loglevel_fsf.attr,
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&driver_attr_loglevel_config.attr,
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&driver_attr_loglevel_cio.attr,
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&driver_attr_loglevel_qdio.attr,
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&driver_attr_loglevel_erp.attr,
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&driver_attr_loglevel_fc.attr,
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&driver_attr_version.attr,
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NULL
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};
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static struct attribute_group zfcp_driver_attr_group = {
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.attrs = zfcp_driver_attrs,
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};
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/**
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* zfcp_sysfs_create_driver_files - create sysfs driver files
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* @dev: pointer to belonging device
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*
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* Create all sysfs attributes of the zfcp device driver
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*/
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int
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zfcp_sysfs_driver_create_files(struct device_driver *drv)
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{
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return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group);
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}
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/**
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* zfcp_sysfs_remove_driver_files - remove sysfs driver files
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* @dev: pointer to belonging device
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*
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* Remove all sysfs attributes of the zfcp device driver
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*/
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void
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zfcp_sysfs_driver_remove_files(struct device_driver *drv)
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{
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sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group);
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}
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#undef ZFCP_LOG_AREA
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