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(physical_wwpn, "0x%016llx\n", adapter->physical_wwpn);
  72 ZFCP_DEFINE_ADAPTER_ATTR(physical_s_id, "0x%06x\n", adapter->physical_s_id);
  73 ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  74 ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  75 ZFCP_DEFINE_ADAPTER_ATTR(fc_link_speed, "%d Gb/s\n", adapter->fc_link_speed);
  76 ZFCP_DEFINE_ADAPTER_ATTR(fc_service_class, "%d\n", adapter->fc_service_class);
  77 ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n",
  78                          fc_topologies[adapter->fc_topology]);
  79 ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
  80                          adapter->hardware_version);
  81 ZFCP_DEFINE_ADAPTER_ATTR(serial_number, "%17s\n", adapter->serial_number);
  82 ZFCP_DEFINE_ADAPTER_ATTR(scsi_host_no, "0x%x\n", adapter->scsi_host_no);
  83 ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask
  84                          (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status));
  85
  86 /**
  87  * zfcp_sysfs_port_add_store - add a port to sysfs tree
  88  * @dev: pointer to belonging device
  89  * @buf: pointer to input buffer
  90  * @count: number of bytes in buffer
  91  *
  92  * Store function of the "port_add" attribute of an adapter.
  93  */
  94 static ssize_t
  95 zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  96 {
  97         wwn_t wwpn;
  98         char *endp;
  99         struct zfcp_adapter *adapter;
 100         struct zfcp_port *port;
 101         int retval = -EINVAL;
 102
 103         down(&zfcp_data.config_sema);
 104
 105         adapter = dev_get_drvdata(dev);
 106         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 107                 retval = -EBUSY;
 108                 goto out;
 109         }
 110
 111         wwpn = simple_strtoull(buf, &endp, 0);
 112         if ((endp + 1) < (buf + count))
 113                 goto out;
 114
 115         port = zfcp_port_enqueue(adapter, wwpn, 0, 0);
 116         if (!port)
 117                 goto out;
 118
 119         retval = 0;
 120
 121         zfcp_erp_port_reopen(port, 0);
 122         zfcp_erp_wait(port->adapter);
 123         zfcp_port_put(port);
 124  out:
 125         up(&zfcp_data.config_sema);
 126         return retval ? retval : (ssize_t) count;
 127 }
 128
 129 static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);
 130
 131 /**
 132  * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
 133  * @dev: pointer to belonging device
 134  * @buf: pointer to input buffer
 135  * @count: number of bytes in buffer
 136  *
 137  * Store function of the "port_remove" attribute of an adapter.
 138  */
 139 static ssize_t
 140 zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 141 {
 142         struct zfcp_adapter *adapter;
 143         struct zfcp_port *port;
 144         wwn_t wwpn;
 145         char *endp;
 146         int retval = 0;
 147
 148         down(&zfcp_data.config_sema);
 149
 150         adapter = dev_get_drvdata(dev);
 151         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 152                 retval = -EBUSY;
 153                 goto out;
 154         }
 155
 156         wwpn = simple_strtoull(buf, &endp, 0);
 157         if ((endp + 1) < (buf + count)) {
 158                 retval = -EINVAL;
 159                 goto out;
 160         }
 161
 162         write_lock_irq(&zfcp_data.config_lock);
 163         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 164         if (port && (atomic_read(&port->refcount) == 0)) {
 165                 zfcp_port_get(port);
 166                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 167                 list_move(&port->list, &adapter->port_remove_lh);
 168         }
 169         else {
 170                 port = NULL;
 171         }
 172         write_unlock_irq(&zfcp_data.config_lock);
 173
 174         if (!port) {
 175                 retval = -ENXIO;
 176                 goto out;
 177         }
 178
 179         zfcp_erp_port_shutdown(port, 0);
 180         zfcp_erp_wait(adapter);
 181         zfcp_port_put(port);
 182         zfcp_port_dequeue(port);
 183  out:
 184         up(&zfcp_data.config_sema);
 185         return retval ? retval : (ssize_t) count;
 186 }
 187
 188 static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);
 189
 190 /**
 191  * zfcp_sysfs_adapter_failed_store - failed state of adapter
 192  * @dev: pointer to belonging device
 193  * @buf: pointer to input buffer
 194  * @count: number of bytes in buffer
 195  *
 196  * Store function of the "failed" attribute of an adapter.
 197  * If a "0" gets written to "failed", error recovery will be
 198  * started for the belonging adapter.
 199  */
 200 static ssize_t
 201 zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr,
 202                                 const char *buf, size_t count)
 203 {
 204         struct zfcp_adapter *adapter;
 205         unsigned int val;
 206         char *endp;
 207         int retval = 0;
 208
 209         down(&zfcp_data.config_sema);
 210
 211         adapter = dev_get_drvdata(dev);
 212         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 213                 retval = -EBUSY;
 214                 goto out;
 215         }
 216
 217         val = simple_strtoul(buf, &endp, 0);
 218         if (((endp + 1) < (buf + count)) || (val != 0)) {
 219                 retval = -EINVAL;
 220                 goto out;
 221         }
 222
 223         zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
 224                                        ZFCP_SET);
 225         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 226         zfcp_erp_wait(adapter);
 227  out:
 228         up(&zfcp_data.config_sema);
 229         return retval ? retval : (ssize_t) count;
 230 }
 231
 232 /**
 233  * zfcp_sysfs_adapter_failed_show - failed state of adapter
 234  * @dev: pointer to belonging device
 235  * @buf: pointer to input buffer
 236  *
 237  * Show function of "failed" attribute of adapter. Will be
 238  * "0" if adapter is working, otherwise "1".
 239  */
 240 static ssize_t
 241 zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
 242 {
 243         struct zfcp_adapter *adapter;
 244
 245         adapter = dev_get_drvdata(dev);
 246         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
 247                 return sprintf(buf, "1\n");
 248         else
 249                 return sprintf(buf, "0\n");
 250 }
 251
 252 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
 253                    zfcp_sysfs_adapter_failed_store);
 254
 255 static struct attribute *zfcp_adapter_attrs[] = {
 256         &dev_attr_failed.attr,
 257         &dev_attr_in_recovery.attr,
 258         &dev_attr_port_remove.attr,
 259         &dev_attr_port_add.attr,
 260         &dev_attr_wwnn.attr,
 261         &dev_attr_wwpn.attr,
 262         &dev_attr_s_id.attr,
 263         &dev_attr_peer_wwnn.attr,
 264         &dev_attr_peer_wwpn.attr,
 265         &dev_attr_peer_d_id.attr,
 266         &dev_attr_physical_wwpn.attr,
 267         &dev_attr_physical_s_id.attr,
 268         &dev_attr_card_version.attr,
 269         &dev_attr_lic_version.attr,
 270         &dev_attr_fc_link_speed.attr,
 271         &dev_attr_fc_service_class.attr,
 272         &dev_attr_fc_topology.attr,
 273         &dev_attr_scsi_host_no.attr,
 274         &dev_attr_status.attr,
 275         &dev_attr_hardware_version.attr,
 276         &dev_attr_serial_number.attr,
 277         NULL
 278 };
 279
 280 static struct attribute_group zfcp_adapter_attr_group = {
 281         .attrs = zfcp_adapter_attrs,
 282 };
 283
 284 /**
 285  * zfcp_sysfs_create_adapter_files - create sysfs adapter files
 286  * @dev: pointer to belonging device
 287  *
 288  * Create all attributes of the sysfs representation of an adapter.
 289  */
 290 int
 291 zfcp_sysfs_adapter_create_files(struct device *dev)
 292 {
 293         return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
 294 }
 295
 296 /**
 297  * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
 298  * @dev: pointer to belonging device
 299  *
 300  * Remove all attributes of the sysfs representation of an adapter.
 301  */
 302 void
 303 zfcp_sysfs_adapter_remove_files(struct device *dev)
 304 {
 305         sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
 306 }
 307
 308 #undef ZFCP_LOG_AREA