2 * linux/drivers/s390/scsi/zfcp_sysfs_port.c
4 * FCP adapter driver for IBM eServer zSeries
6 * sysfs port related routines
8 * (C) Copyright IBM Corp. 2003, 2004
11 * Martin Peschke <mpeschke@de.ibm.com>
12 * Heiko Carstens <heiko.carstens@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #define ZFCP_SYSFS_PORT_C_REVISION "$Revision: 1.39 $"
31 #include <linux/init.h>
32 #include <linux/module.h>
33 #include <asm/ccwdev.h>
37 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
40 * zfcp_sysfs_port_release - gets called when a struct device port is released
41 * @dev: pointer to belonging device
44 zfcp_sysfs_port_release(struct device *dev)
50 * ZFCP_DEFINE_PORT_ATTR
51 * @_name: name of show attribute
52 * @_format: format string
53 * @_value: value to print
55 * Generates attributes for a port.
57 #define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value) \
58 static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, \
61 struct zfcp_port *port; \
63 port = dev_get_drvdata(dev); \
64 return sprintf(buf, _format, _value); \
67 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL);
69 ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status));
70 ZFCP_DEFINE_PORT_ATTR(wwnn, "0x%016llx\n", port->wwnn);
71 ZFCP_DEFINE_PORT_ATTR(d_id, "0x%06x\n", port->d_id);
72 ZFCP_DEFINE_PORT_ATTR(scsi_id, "0x%x\n", port->scsi_id);
75 * zfcp_sysfs_unit_add_store - add a unit to sysfs tree
76 * @dev: pointer to belonging device
77 * @buf: pointer to input buffer
78 * @count: number of bytes in buffer
80 * Store function of the "unit_add" attribute of a port.
83 zfcp_sysfs_unit_add_store(struct device *dev, const char *buf, size_t count)
87 struct zfcp_port *port;
88 struct zfcp_unit *unit;
91 down(&zfcp_data.config_sema);
93 port = dev_get_drvdata(dev);
94 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
99 fcp_lun = simple_strtoull(buf, &endp, 0);
100 if ((endp + 1) < (buf + count))
103 unit = zfcp_unit_enqueue(port, fcp_lun);
109 zfcp_erp_unit_reopen(unit, 0);
110 zfcp_erp_wait(unit->port->adapter);
113 up(&zfcp_data.config_sema);
114 return retval ? retval : count;
117 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
120 * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree
121 * @dev: pointer to belonging device
122 * @buf: pointer to input buffer
123 * @count: number of bytes in buffer
126 zfcp_sysfs_unit_remove_store(struct device *dev, const char *buf, size_t count)
128 struct zfcp_port *port;
129 struct zfcp_unit *unit;
132 int retval = -EINVAL;
134 down(&zfcp_data.config_sema);
136 port = dev_get_drvdata(dev);
137 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
142 fcp_lun = simple_strtoull(buf, &endp, 0);
143 if ((endp + 1) < (buf + count))
146 write_lock_irq(&zfcp_data.config_lock);
147 unit = zfcp_get_unit_by_lun(port, fcp_lun);
148 if (unit && (atomic_read(&unit->refcount) == 0)) {
150 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
151 list_move(&unit->list, &port->unit_remove_lh);
156 write_unlock_irq(&zfcp_data.config_lock);
163 zfcp_erp_unit_shutdown(unit, 0);
164 zfcp_erp_wait(unit->port->adapter);
166 zfcp_unit_dequeue(unit);
168 up(&zfcp_data.config_sema);
169 return retval ? retval : count;
172 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
175 * zfcp_sysfs_port_failed_store - failed state of port
176 * @dev: pointer to belonging device
177 * @buf: pointer to input buffer
178 * @count: number of bytes in buffer
180 * Store function of the "failed" attribute of a port.
181 * If a "0" gets written to "failed", error recovery will be
182 * started for the belonging port.
185 zfcp_sysfs_port_failed_store(struct device *dev, const char *buf, size_t count)
187 struct zfcp_port *port;
192 down(&zfcp_data.config_sema);
194 port = dev_get_drvdata(dev);
195 if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
200 val = simple_strtoul(buf, &endp, 0);
201 if (((endp + 1) < (buf + count)) || (val != 0)) {
206 zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
207 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED);
208 zfcp_erp_wait(port->adapter);
210 up(&zfcp_data.config_sema);
211 return retval ? retval : count;
215 * zfcp_sysfs_port_failed_show - failed state of port
216 * @dev: pointer to belonging device
217 * @buf: pointer to input buffer
219 * Show function of "failed" attribute of port. Will be
220 * "0" if port is working, otherwise "1".
223 zfcp_sysfs_port_failed_show(struct device *dev, char *buf)
225 struct zfcp_port *port;
227 port = dev_get_drvdata(dev);
228 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status))
229 return sprintf(buf, "1\n");
231 return sprintf(buf, "0\n");
234 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show,
235 zfcp_sysfs_port_failed_store);
238 * zfcp_sysfs_port_in_recovery_show - recovery state of port
239 * @dev: pointer to belonging device
240 * @buf: pointer to input buffer
242 * Show function of "in_recovery" attribute of port. Will be
243 * "0" if no error recovery is pending for port, otherwise "1".
246 zfcp_sysfs_port_in_recovery_show(struct device *dev, char *buf)
248 struct zfcp_port *port;
250 port = dev_get_drvdata(dev);
251 if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status))
252 return sprintf(buf, "1\n");
254 return sprintf(buf, "0\n");
257 static DEVICE_ATTR(in_recovery, S_IRUGO, zfcp_sysfs_port_in_recovery_show,
261 * zfcp_port_common_attrs
262 * sysfs attributes that are common for all kind of fc ports.
264 static struct attribute *zfcp_port_common_attrs[] = {
265 &dev_attr_failed.attr,
266 &dev_attr_in_recovery.attr,
267 &dev_attr_status.attr,
273 static struct attribute_group zfcp_port_common_attr_group = {
274 .attrs = zfcp_port_common_attrs,
278 * zfcp_port_no_ns_attrs
279 * sysfs attributes not to be used for nameserver ports.
281 static struct attribute *zfcp_port_no_ns_attrs[] = {
282 &dev_attr_unit_add.attr,
283 &dev_attr_unit_remove.attr,
284 &dev_attr_scsi_id.attr,
288 static struct attribute_group zfcp_port_no_ns_attr_group = {
289 .attrs = zfcp_port_no_ns_attrs,
293 * zfcp_sysfs_port_create_files - create sysfs port files
294 * @dev: pointer to belonging device
296 * Create all attributes of the sysfs representation of a port.
299 zfcp_sysfs_port_create_files(struct device *dev, u32 flags)
303 retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group);
305 if ((flags & ZFCP_STATUS_PORT_NAMESERVER) || retval)
308 retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group);
310 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
316 * zfcp_sysfs_port_remove_files - remove sysfs port files
317 * @dev: pointer to belonging device
319 * Remove all attributes of the sysfs representation of a port.
322 zfcp_sysfs_port_remove_files(struct device *dev, u32 flags)
324 sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
325 if (!(flags & ZFCP_STATUS_PORT_NAMESERVER))
326 sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group);