1/*
2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
4 *
5 * (C) Copyright IBM Corp. 2002, 2006
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include "zfcp_ext.h"
23
24#define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG
25
26/**
27 * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes
28 * @_name:       name of attribute
29 * @_define:     name of ZFCP loglevel define
30 *
31 * Generates store function for a sysfs loglevel attribute of zfcp driver.
32 */
33#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define)                               \
34static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \
35						   const char *buf,           \
36						   size_t count)              \
37{                                                                             \
38	unsigned int loglevel;                                                \
39	unsigned int new_loglevel;                                            \
40	char *endp;                                                           \
41                                                                              \
42	new_loglevel = simple_strtoul(buf, &endp, 0);                         \
43	if ((endp + 1) < (buf + count))                                       \
44		return -EINVAL;                                               \
45	if (new_loglevel > 3)                                                 \
46		return -EINVAL;                                               \
47	down(&zfcp_data.config_sema);                                         \
48	loglevel = atomic_read(&zfcp_data.loglevel);                          \
49	loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2));  \
50	loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2);           \
51	atomic_set(&zfcp_data.loglevel, loglevel);                            \
52	up(&zfcp_data.config_sema);                                           \
53	return count;                                                         \
54}                                                                             \
55                                                                              \
56static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev,  \
57						  char *buf)                  \
58{                                                                             \
59	return sprintf(buf,"%d\n", (unsigned int)                             \
60		       ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define));          \
61}                                                                             \
62                                                                              \
63static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO,                       \
64		   zfcp_sysfs_loglevel_##_name##_show,                        \
65		   zfcp_sysfs_loglevel_##_name##_store);
66
67ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
68ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
69ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
70ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
71ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
72ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
73ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
74ZFCP_DEFINE_DRIVER_ATTR(fc, FC);
75
76static ssize_t zfcp_sysfs_version_show(struct device_driver *dev,
77					      char *buf)
78{
79	return sprintf(buf, "%s\n", zfcp_data.driver_version);
80}
81
82static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);
83
84static struct attribute *zfcp_driver_attrs[] = {
85	&driver_attr_loglevel_other.attr,
86	&driver_attr_loglevel_scsi.attr,
87	&driver_attr_loglevel_fsf.attr,
88	&driver_attr_loglevel_config.attr,
89	&driver_attr_loglevel_cio.attr,
90	&driver_attr_loglevel_qdio.attr,
91	&driver_attr_loglevel_erp.attr,
92	&driver_attr_loglevel_fc.attr,
93	&driver_attr_version.attr,
94	NULL
95};
96
97static struct attribute_group zfcp_driver_attr_group = {
98	.attrs = zfcp_driver_attrs,
99};
100
101/**
102 * zfcp_sysfs_create_driver_files - create sysfs driver files
103 * @dev: pointer to belonging device
104 *
105 * Create all sysfs attributes of the zfcp device driver
106 */
107int
108zfcp_sysfs_driver_create_files(struct device_driver *drv)
109{
110	return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group);
111}
112
113/**
114 * zfcp_sysfs_remove_driver_files - remove sysfs driver files
115 * @dev: pointer to belonging device
116 *
117 * Remove all sysfs attributes of the zfcp device driver
118 */
119void
120zfcp_sysfs_driver_remove_files(struct device_driver *drv)
121{
122	sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group);
123}
124
125#undef ZFCP_LOG_AREA
126