e7345a74800a950bb03d6ed762e0198d0c0e8733
[linux-2.6.git] / drivers / s390 / scsi / zfcp_sysfs_adapter.c
1 /*
2  * linux/drivers/s390/scsi/zfcp_sysfs_adapter.c
3  *
4  * FCP adapter driver for IBM eServer zSeries
5  *
6  * sysfs adapter 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_ADAPTER_C_REVISION "$Revision: 1.38 $"
31
32 #include "zfcp_ext.h"
33
34 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG
35
36 static const char fc_topologies[5][25] = {
37         "<error>",
38         "point-to-point",
39         "fabric",
40         "arbitrated loop",
41         "fabric (virt. adapter)"
42 };
43
44 /**
45  * ZFCP_DEFINE_ADAPTER_ATTR
46  * @_name:   name of show attribute
47  * @_format: format string
48  * @_value:  value to print
49  *
50  * Generates attributes for an adapter.
51  */
52 #define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value)                      \
53 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, struct device_attribute *attr,          \
54                                                  char *buf)                   \
55 {                                                                             \
56         struct zfcp_adapter *adapter;                                         \
57                                                                               \
58         adapter = dev_get_drvdata(dev);                                       \
59         return sprintf(buf, _format, _value);                                 \
60 }                                                                             \
61                                                                               \
62 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
63
64 ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
65 ZFCP_DEFINE_ADAPTER_ATTR(wwnn, "0x%016llx\n", adapter->wwnn);
66 ZFCP_DEFINE_ADAPTER_ATTR(wwpn, "0x%016llx\n", adapter->wwpn);
67 ZFCP_DEFINE_ADAPTER_ATTR(s_id, "0x%06x\n", adapter->s_id);
68 ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn);
69 ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn);
70 ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
71 ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
72 ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
73 ZFCP_DEFINE_ADAPTER_ATTR(fc_link_speed, "%d Gb/s\n", adapter->fc_link_speed);
74 ZFCP_DEFINE_ADAPTER_ATTR(fc_service_class, "%d\n", adapter->fc_service_class);
75 ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n",
76                          fc_topologies[adapter->fc_topology]);
77 ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
78                          adapter->hardware_version);
79 ZFCP_DEFINE_ADAPTER_ATTR(serial_number, "%17s\n", adapter->serial_number);
80 ZFCP_DEFINE_ADAPTER_ATTR(scsi_host_no, "0x%x\n", adapter->scsi_host_no);
81 ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask
82                          (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status));
83
84 /**
85  * zfcp_sysfs_port_add_store - add a port to sysfs tree
86  * @dev: pointer to belonging device
87  * @buf: pointer to input buffer
88  * @count: number of bytes in buffer
89  *
90  * Store function of the "port_add" attribute of an adapter.
91  */
92 static ssize_t
93 zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
94 {
95         wwn_t wwpn;
96         char *endp;
97         struct zfcp_adapter *adapter;
98         struct zfcp_port *port;
99         int retval = -EINVAL;
100
101         down(&zfcp_data.config_sema);
102
103         adapter = dev_get_drvdata(dev);
104         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
105                 retval = -EBUSY;
106                 goto out;
107         }
108
109         wwpn = simple_strtoull(buf, &endp, 0);
110         if ((endp + 1) < (buf + count))
111                 goto out;
112
113         port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
114         if (!port)
115                 goto out;
116
117         retval = 0;
118
119         zfcp_erp_port_reopen(port, 0);
120         zfcp_erp_wait(port->adapter);
121         zfcp_port_put(port);
122  out:
123         up(&zfcp_data.config_sema);
124         return retval ? retval : (ssize_t) count;
125 }
126
127 static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);
128
129 /**
130  * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
131  * @dev: pointer to belonging device
132  * @buf: pointer to input buffer
133  * @count: number of bytes in buffer
134  *
135  * Store function of the "port_remove" attribute of an adapter.
136  */
137 static ssize_t
138 zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
139 {
140         struct zfcp_adapter *adapter;
141         struct zfcp_port *port;
142         wwn_t wwpn;
143         char *endp;
144         int retval = 0;
145
146         down(&zfcp_data.config_sema);
147
148         adapter = dev_get_drvdata(dev);
149         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
150                 retval = -EBUSY;
151                 goto out;
152         }
153
154         wwpn = simple_strtoull(buf, &endp, 0);
155         if ((endp + 1) < (buf + count)) {
156                 retval = -EINVAL;
157                 goto out;
158         }
159
160         write_lock_irq(&zfcp_data.config_lock);
161         port = zfcp_get_port_by_wwpn(adapter, wwpn);
162         if (port && (atomic_read(&port->refcount) == 0)) {
163                 zfcp_port_get(port);
164                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
165                 list_move(&port->list, &adapter->port_remove_lh);
166         }
167         else {
168                 port = NULL;
169         }
170         write_unlock_irq(&zfcp_data.config_lock);
171
172         if (!port) {
173                 retval = -ENXIO;
174                 goto out;
175         }
176
177         zfcp_erp_port_shutdown(port, 0);
178         zfcp_erp_wait(adapter);
179         zfcp_port_put(port);
180         zfcp_port_dequeue(port);
181  out:
182         up(&zfcp_data.config_sema);
183         return retval ? retval : (ssize_t) count;
184 }
185
186 static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);
187
188 /**
189  * zfcp_sysfs_adapter_failed_store - failed state of adapter
190  * @dev: pointer to belonging device
191  * @buf: pointer to input buffer
192  * @count: number of bytes in buffer
193  *
194  * Store function of the "failed" attribute of an adapter.
195  * If a "0" gets written to "failed", error recovery will be
196  * started for the belonging adapter.
197  */
198 static ssize_t
199 zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr,
200                                 const char *buf, size_t count)
201 {
202         struct zfcp_adapter *adapter;
203         unsigned int val;
204         char *endp;
205         int retval = 0;
206
207         down(&zfcp_data.config_sema);
208
209         adapter = dev_get_drvdata(dev);
210         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
211                 retval = -EBUSY;
212                 goto out;
213         }
214
215         val = simple_strtoul(buf, &endp, 0);
216         if (((endp + 1) < (buf + count)) || (val != 0)) {
217                 retval = -EINVAL;
218                 goto out;
219         }
220
221         zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
222                                        ZFCP_SET);
223         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
224         zfcp_erp_wait(adapter);
225  out:
226         up(&zfcp_data.config_sema);
227         return retval ? retval : (ssize_t) count;
228 }
229
230 /**
231  * zfcp_sysfs_adapter_failed_show - failed state of adapter
232  * @dev: pointer to belonging device
233  * @buf: pointer to input buffer
234  *
235  * Show function of "failed" attribute of adapter. Will be
236  * "0" if adapter is working, otherwise "1".
237  */
238 static ssize_t
239 zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
240 {
241         struct zfcp_adapter *adapter;
242
243         adapter = dev_get_drvdata(dev);
244         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
245                 return sprintf(buf, "1\n");
246         else
247                 return sprintf(buf, "0\n");
248 }
249
250 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
251                    zfcp_sysfs_adapter_failed_store);
252
253 static struct attribute *zfcp_adapter_attrs[] = {
254         &dev_attr_failed.attr,
255         &dev_attr_in_recovery.attr,
256         &dev_attr_port_remove.attr,
257         &dev_attr_port_add.attr,
258         &dev_attr_wwnn.attr,
259         &dev_attr_wwpn.attr,
260         &dev_attr_s_id.attr,
261         &dev_attr_peer_wwnn.attr,
262         &dev_attr_peer_wwpn.attr,
263         &dev_attr_peer_d_id.attr,
264         &dev_attr_card_version.attr,
265         &dev_attr_lic_version.attr,
266         &dev_attr_fc_link_speed.attr,
267         &dev_attr_fc_service_class.attr,
268         &dev_attr_fc_topology.attr,
269         &dev_attr_scsi_host_no.attr,
270         &dev_attr_status.attr,
271         &dev_attr_hardware_version.attr,
272         &dev_attr_serial_number.attr,
273         NULL
274 };
275
276 static struct attribute_group zfcp_adapter_attr_group = {
277         .attrs = zfcp_adapter_attrs,
278 };
279
280 /**
281  * zfcp_sysfs_create_adapter_files - create sysfs adapter files
282  * @dev: pointer to belonging device
283  *
284  * Create all attributes of the sysfs representation of an adapter.
285  */
286 int
287 zfcp_sysfs_adapter_create_files(struct device *dev)
288 {
289         return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
290 }
291
292 /**
293  * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
294  * @dev: pointer to belonging device
295  *
296  * Remove all attributes of the sysfs representation of an adapter.
297  */
298 void
299 zfcp_sysfs_adapter_remove_files(struct device *dev)
300 {
301         sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
302 }
303
304 #undef ZFCP_LOG_AREA