Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/s390/scsi/zfcp_sysfs_driver.c |
| 3 | * |
| 4 | * FCP adapter driver for IBM eServer zSeries |
| 5 | * |
| 6 | * sysfs driver related routines |
| 7 | * |
| 8 | * (C) Copyright IBM Corp. 2003, 2004 |
| 9 | * |
| 10 | * Authors: |
| 11 | * Martin Peschke <mpeschke@de.ibm.com> |
| 12 | * Heiko Carstens <heiko.carstens@de.ibm.com> |
| 13 | * Andreas Herrmann <aherrman@de.ibm.com> |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License as published by |
| 17 | * the Free Software Foundation; either version 2, or (at your option) |
| 18 | * any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 28 | */ |
| 29 | |
| 30 | #define ZFCP_SYSFS_DRIVER_C_REVISION "$Revision: 1.17 $" |
| 31 | |
| 32 | #include "zfcp_ext.h" |
| 33 | |
| 34 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG |
| 35 | |
| 36 | /** |
| 37 | * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes |
| 38 | * @_name: name of attribute |
| 39 | * @_define: name of ZFCP loglevel define |
| 40 | * |
| 41 | * Generates store function for a sysfs loglevel attribute of zfcp driver. |
| 42 | */ |
| 43 | #define ZFCP_DEFINE_DRIVER_ATTR(_name, _define) \ |
| 44 | static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \ |
| 45 | const char *buf, \ |
| 46 | size_t count) \ |
| 47 | { \ |
| 48 | unsigned int loglevel; \ |
| 49 | unsigned int new_loglevel; \ |
| 50 | char *endp; \ |
| 51 | \ |
| 52 | new_loglevel = simple_strtoul(buf, &endp, 0); \ |
| 53 | if ((endp + 1) < (buf + count)) \ |
| 54 | return -EINVAL; \ |
| 55 | if (new_loglevel > 3) \ |
| 56 | return -EINVAL; \ |
| 57 | down(&zfcp_data.config_sema); \ |
| 58 | loglevel = atomic_read(&zfcp_data.loglevel); \ |
| 59 | loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2)); \ |
| 60 | loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2); \ |
| 61 | atomic_set(&zfcp_data.loglevel, loglevel); \ |
| 62 | up(&zfcp_data.config_sema); \ |
| 63 | return count; \ |
| 64 | } \ |
| 65 | \ |
| 66 | static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev, \ |
| 67 | char *buf) \ |
| 68 | { \ |
| 69 | return sprintf(buf,"%d\n", (unsigned int) \ |
| 70 | ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define)); \ |
| 71 | } \ |
| 72 | \ |
| 73 | static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO, \ |
| 74 | zfcp_sysfs_loglevel_##_name##_show, \ |
| 75 | zfcp_sysfs_loglevel_##_name##_store); |
| 76 | |
| 77 | ZFCP_DEFINE_DRIVER_ATTR(other, OTHER); |
| 78 | ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI); |
| 79 | ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF); |
| 80 | ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG); |
| 81 | ZFCP_DEFINE_DRIVER_ATTR(cio, CIO); |
| 82 | ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO); |
| 83 | ZFCP_DEFINE_DRIVER_ATTR(erp, ERP); |
| 84 | ZFCP_DEFINE_DRIVER_ATTR(fc, FC); |
| 85 | |
| 86 | static ssize_t zfcp_sysfs_version_show(struct device_driver *dev, |
| 87 | char *buf) |
| 88 | { |
| 89 | return sprintf(buf, "%s\n", zfcp_data.driver_version); |
| 90 | } |
| 91 | |
| 92 | static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL); |
| 93 | |
| 94 | static struct attribute *zfcp_driver_attrs[] = { |
| 95 | &driver_attr_loglevel_other.attr, |
| 96 | &driver_attr_loglevel_scsi.attr, |
| 97 | &driver_attr_loglevel_fsf.attr, |
| 98 | &driver_attr_loglevel_config.attr, |
| 99 | &driver_attr_loglevel_cio.attr, |
| 100 | &driver_attr_loglevel_qdio.attr, |
| 101 | &driver_attr_loglevel_erp.attr, |
| 102 | &driver_attr_loglevel_fc.attr, |
| 103 | &driver_attr_version.attr, |
| 104 | NULL |
| 105 | }; |
| 106 | |
| 107 | static struct attribute_group zfcp_driver_attr_group = { |
| 108 | .attrs = zfcp_driver_attrs, |
| 109 | }; |
| 110 | |
| 111 | /** |
| 112 | * zfcp_sysfs_create_driver_files - create sysfs driver files |
| 113 | * @dev: pointer to belonging device |
| 114 | * |
| 115 | * Create all sysfs attributes of the zfcp device driver |
| 116 | */ |
| 117 | int |
| 118 | zfcp_sysfs_driver_create_files(struct device_driver *drv) |
| 119 | { |
| 120 | return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * zfcp_sysfs_remove_driver_files - remove sysfs driver files |
| 125 | * @dev: pointer to belonging device |
| 126 | * |
| 127 | * Remove all sysfs attributes of the zfcp device driver |
| 128 | */ |
| 129 | void |
| 130 | zfcp_sysfs_driver_remove_files(struct device_driver *drv) |
| 131 | { |
| 132 | sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group); |
| 133 | } |
| 134 | |
| 135 | #undef ZFCP_LOG_AREA |