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  *
  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)
  17  * any later version.
  18  *
  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.
  23  *
  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.
  27  */
  28
  29 #define ZFCP_SYSFS_ADAPTER_C_REVISION "$Revision: 1.33 $"
  30
  31 #include "zfcp_ext.h"
  32
  33 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG
  34
  35 static const char fc_topologies[5][25] = {
  36         {"<error>"},
  37         {"point-to-point"},
  38         {"fabric"},
  39         {"arbitrated loop"},
  40         {"fabric (virt. adapter)"}
  41 };
  42
  43 /**
  44  * ZFCP_DEFINE_ADAPTER_ATTR
  45  * @_name:   name of show attribute
  46  * @_format: format string
  47  * @_value:  value to print
  48  *
  49  * Generates attributes for an adapter.
  50  */
  51 #define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value)                      \
  52 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,          \
  53                                                  char *buf)                   \
  54 {                                                                             \
  55         struct zfcp_adapter *adapter;                                         \
  56                                                                               \
  57         adapter = dev_get_drvdata(dev);                                       \
  58         return sprintf(buf, _format, _value);                                 \
  59 }                                                                             \
  60                                                                               \
  61 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
  62
  63 ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  64 ZFCP_DEFINE_ADAPTER_ATTR(wwnn, "0x%016llx\n", adapter->wwnn);
  65 ZFCP_DEFINE_ADAPTER_ATTR(wwpn, "0x%016llx\n", adapter->wwpn);
  66 ZFCP_DEFINE_ADAPTER_ATTR(s_id, "0x%06x\n", adapter->s_id);
  67 ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  68 ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  69 ZFCP_DEFINE_ADAPTER_ATTR(fc_link_speed, "%d Gb/s\n", adapter->fc_link_speed);
  70 ZFCP_DEFINE_ADAPTER_ATTR(fc_service_class, "%d\n", adapter->fc_service_class);
  71 ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n",
  72                          fc_topologies[adapter->fc_topology]);
  73 ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
  74                          adapter->hardware_version);
  75 ZFCP_DEFINE_ADAPTER_ATTR(serial_number, "%17s\n", adapter->serial_number);
  76 ZFCP_DEFINE_ADAPTER_ATTR(scsi_host_no, "0x%x\n", adapter->scsi_host_no);
  77
  78 /**
  79  * zfcp_sysfs_adapter_in_recovery_show - recovery state of adapter
  80  * @dev: pointer to belonging device
  81  * @buf: pointer to input buffer
  82  *
  83  * Show function of "in_recovery" attribute of adapter. Will be
  84  * "0" if no error recovery is pending for adapter, otherwise "1".
  85  */
  86 static ssize_t
  87 zfcp_sysfs_adapter_in_recovery_show(struct device *dev, char *buf)
  88 {
  89         struct zfcp_adapter *adapter;
  90
  91         adapter = dev_get_drvdata(dev);
  92         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status))
  93                 return sprintf(buf, "1\n");
  94         else
  95                 return sprintf(buf, "0\n");
  96 }
  97
  98 static DEVICE_ATTR(in_recovery, S_IRUGO,
  99                    zfcp_sysfs_adapter_in_recovery_show, NULL);
 100
 101 /**
 102  * zfcp_sysfs_port_add_store - add a port to sysfs tree
 103  * @dev: pointer to belonging device
 104  * @buf: pointer to input buffer
 105  * @count: number of bytes in buffer
 106  *
 107  * Store function of the "port_add" attribute of an adapter.
 108  */
 109 static ssize_t
 110 zfcp_sysfs_port_add_store(struct device *dev, const char *buf, size_t count)
 111 {
 112         wwn_t wwpn;
 113         char *endp;
 114         struct zfcp_adapter *adapter;
 115         struct zfcp_port *port;
 116         int retval = -EINVAL;
 117
 118         down(&zfcp_data.config_sema);
 119
 120         adapter = dev_get_drvdata(dev);
 121         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 122                 retval = -EBUSY;
 123                 goto out;
 124         }
 125
 126         wwpn = simple_strtoull(buf, &endp, 0);
 127         if ((endp + 1) < (buf + count))
 128                 goto out;
 129
 130         port = zfcp_port_enqueue(adapter, wwpn, 0);
 131         if (!port)
 132                 goto out;
 133
 134         retval = 0;
 135
 136         zfcp_erp_port_reopen(port, 0);
 137         zfcp_erp_wait(port->adapter);
 138         zfcp_port_put(port);
 139  out:
 140         up(&zfcp_data.config_sema);
 141         return retval ? retval : count;
 142 }
 143
 144 static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);
 145
 146 /**
 147  * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
 148  * @dev: pointer to belonging device
 149  * @buf: pointer to input buffer
 150  * @count: number of bytes in buffer
 151  *
 152  * Store function of the "port_remove" attribute of an adapter.
 153  */
 154 static ssize_t
 155 zfcp_sysfs_port_remove_store(struct device *dev, const char *buf, size_t count)
 156 {
 157         struct zfcp_adapter *adapter;
 158         struct zfcp_port *port;
 159         wwn_t wwpn;
 160         char *endp;
 161         int retval = 0;
 162
 163         down(&zfcp_data.config_sema);
 164
 165         adapter = dev_get_drvdata(dev);
 166         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 167                 retval = -EBUSY;
 168                 goto out;
 169         }
 170
 171         wwpn = simple_strtoull(buf, &endp, 0);
 172         if ((endp + 1) < (buf + count)) {
 173                 retval = -EINVAL;
 174                 goto out;
 175         }
 176
 177         write_lock_irq(&zfcp_data.config_lock);
 178         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 179         if (port && (atomic_read(&port->refcount) == 0)) {
 180                 zfcp_port_get(port);
 181                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 182                 list_move(&port->list, &adapter->port_remove_lh);
 183         }
 184         else {
 185                 port = NULL;
 186         }
 187         write_unlock_irq(&zfcp_data.config_lock);
 188
 189         if (!port) {
 190                 retval = -ENXIO;
 191                 goto out;
 192         }
 193
 194         zfcp_erp_port_shutdown(port, 0);
 195         zfcp_erp_wait(adapter);
 196         zfcp_port_put(port);
 197         zfcp_port_dequeue(port);
 198  out:
 199         up(&zfcp_data.config_sema);
 200         return retval ? retval : count;
 201 }
 202
 203 static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);
 204
 205 /**
 206  * zfcp_sysfs_adapter_failed_store - failed state of adapter
 207  * @dev: pointer to belonging device
 208  * @buf: pointer to input buffer
 209  * @count: number of bytes in buffer
 210  *
 211  * Store function of the "failed" attribute of an adapter.
 212  * If a "0" gets written to "failed", error recovery will be
 213  * started for the belonging adapter.
 214  */
 215 static ssize_t
 216 zfcp_sysfs_adapter_failed_store(struct device *dev,
 217                                 const char *buf, size_t count)
 218 {
 219         struct zfcp_adapter *adapter;
 220         unsigned int val;
 221         char *endp;
 222         int retval = 0;
 223
 224         down(&zfcp_data.config_sema);
 225
 226         adapter = dev_get_drvdata(dev);
 227         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 228                 retval = -EBUSY;
 229                 goto out;
 230         }
 231
 232         val = simple_strtoul(buf, &endp, 0);
 233         if (((endp + 1) < (buf + count)) || (val != 0)) {
 234                 retval = -EINVAL;
 235                 goto out;
 236         }
 237
 238         zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
 239                                        ZFCP_SET);
 240         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 241         zfcp_erp_wait(adapter);
 242  out:
 243         up(&zfcp_data.config_sema);
 244         return retval ? retval : count;
 245 }
 246
 247 /**
 248  * zfcp_sysfs_adapter_failed_show - failed state of adapter
 249  * @dev: pointer to belonging device
 250  * @buf: pointer to input buffer
 251  *
 252  * Show function of "failed" attribute of adapter. Will be
 253  * "0" if adapter is working, otherwise "1".
 254  */
 255 static ssize_t
 256 zfcp_sysfs_adapter_failed_show(struct device *dev, char *buf)
 257 {
 258         struct zfcp_adapter *adapter;
 259
 260         adapter = dev_get_drvdata(dev);
 261         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
 262                 return sprintf(buf, "1\n");
 263         else
 264                 return sprintf(buf, "0\n");
 265 }
 266
 267 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
 268                    zfcp_sysfs_adapter_failed_store);
 269
 270 static struct attribute *zfcp_adapter_attrs[] = {
 271         &dev_attr_failed.attr,
 272         &dev_attr_in_recovery.attr,
 273         &dev_attr_port_remove.attr,
 274         &dev_attr_port_add.attr,
 275         &dev_attr_wwnn.attr,
 276         &dev_attr_wwpn.attr,
 277         &dev_attr_s_id.attr,
 278         &dev_attr_card_version.attr,
 279         &dev_attr_lic_version.attr,
 280         &dev_attr_fc_link_speed.attr,
 281         &dev_attr_fc_service_class.attr,
 282         &dev_attr_fc_topology.attr,
 283         &dev_attr_scsi_host_no.attr,
 284         &dev_attr_status.attr,
 285         &dev_attr_hardware_version.attr,
 286         &dev_attr_serial_number.attr,
 287         NULL
 288 };
 289
 290 static struct attribute_group zfcp_adapter_attr_group = {
 291         .attrs = zfcp_adapter_attrs,
 292 };
 293
 294 /**
 295  * zfcp_sysfs_create_adapter_files - create sysfs adapter files
 296  * @dev: pointer to belonging device
 297  *
 298  * Create all attributes of the sysfs representation of an adapter.
 299  */
 300 int
 301 zfcp_sysfs_adapter_create_files(struct device *dev)
 302 {
 303         return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
 304 }
 305
 306 /**
 307  * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
 308  * @dev: pointer to belonging device
 309  *
 310  * Remove all attributes of the sysfs representation of an adapter.
 311  */
 312 void
 313 zfcp_sysfs_adapter_remove_files(struct device *dev)
 314 {
 315         sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
 316 }
 317
 318 #undef ZFCP_LOG_AREA