diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_sysfs_driver.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs_driver.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_sysfs_driver.c b/drivers/s390/scsi/zfcp_sysfs_driver.c new file mode 100644 index 00000000000..77a5e2dcc0f --- /dev/null +++ b/drivers/s390/scsi/zfcp_sysfs_driver.c @@ -0,0 +1,135 @@ +/* + * 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. + */ + +#define ZFCP_SYSFS_DRIVER_C_REVISION "$Revision: 1.17 $" + +#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 |