Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[linux-2.6] / drivers / s390 / scsi / zfcp_sysfs_driver.c
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)                               \
34 static 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                                                                               \
56 static 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                                                                               \
63 static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO,                       \
64                    zfcp_sysfs_loglevel_##_name##_show,                        \
65                    zfcp_sysfs_loglevel_##_name##_store);
66
67 ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
68 ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
69 ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
70 ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
71 ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
72 ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
73 ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
74 ZFCP_DEFINE_DRIVER_ATTR(fc, FC);
75
76 static 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
82 static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);
83
84 static 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
97 static 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  */
107 int
108 zfcp_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  */
119 void
120 zfcp_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