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: 1.32 $"
  30
  31 #include <asm/ccwdev.h>
  32 #include "zfcp_ext.h"
  33 #include "zfcp_def.h"
  34
  35 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG
  36
  37 static const char fc_topologies[5][25] = {
  38         {"<error>"},
  39         {"point-to-point"},
  40         {"fabric"},
  41         {"arbitrated loop"},
  42         {"fabric (virt. adapter)"}
  43 };
  44
  45 /**
  46  * ZFCP_DEFINE_ADAPTER_ATTR
  47  * @_name:   name of show attribute
  48  * @_format: format string
  49  * @_value:  value to print
  50  *
  51  * Generates attributes for an adapter.
  52  */
  53 #define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value)                      \
  54 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,          \
  55                                                  char *buf)                   \
  56 {                                                                             \
  57         struct zfcp_adapter *adapter;                                         \
  58                                                                               \
  59         adapter = dev_get_drvdata(dev);                                       \
  60         return sprintf(buf, _format, _value);                                 \
  61 }                                                                             \
  62                                                                               \
  63 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
  64
  65 ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  66 ZFCP_DEFINE_ADAPTER_ATTR(wwnn, "0x%016llx\n", adapter->wwnn);
  67 ZFCP_DEFINE_ADAPTER_ATTR(wwpn, "0x%016llx\n", adapter->wwpn);
  68 ZFCP_DEFINE_ADAPTER_ATTR(s_id, "0x%06x\n", adapter->s_id);
  69 ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  70 ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  71 ZFCP_DEFINE_ADAPTER_ATTR(fc_link_speed, "%d Gb/s\n", adapter->fc_link_speed);
  72 ZFCP_DEFINE_ADAPTER_ATTR(fc_service_class, "%d\n", adapter->fc_service_class);
  73 ZFCP_DEFINE_ADAPTER_ATTR(fc_topology, "%s\n",
  74                          fc_topologies[adapter->fc_topology]);
  75 ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
  76                          adapter->hardware_version);
  77 ZFCP_DEFINE_ADAPTER_ATTR(serial_number, "%17s\n", adapter->serial_number);
  78 ZFCP_DEFINE_ADAPTER_ATTR(scsi_host_no, "0x%x\n", adapter->scsi_host_no);
  79
  80 /**
  81  * zfcp_sysfs_adapter_in_recovery_show - recovery state of adapter
  82  * @dev: pointer to belonging device
  83  * @buf: pointer to input buffer
  84  *
  85  * Show function of "in_recovery" attribute of adapter. Will be
  86  * "0" if no error recovery is pending for adapter, otherwise "1".
  87  */
  88 static ssize_t
  89 zfcp_sysfs_adapter_in_recovery_show(struct device *dev, char *buf)
  90 {
  91         struct zfcp_adapter *adapter;
  92
  93         adapter = dev_get_drvdata(dev);
  94         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status))
  95                 return sprintf(buf, "1\n");
  96         else
  97                 return sprintf(buf, "0\n");
  98 }
  99
 100 static DEVICE_ATTR(in_recovery, S_IRUGO,
 101                    zfcp_sysfs_adapter_in_recovery_show, NULL);
 102
 103 /**
 104  * zfcp_sysfs_port_add_store - add a port to sysfs tree
 105  * @dev: pointer to belonging device
 106  * @buf: pointer to input buffer
 107  * @count: number of bytes in buffer
 108  *
 109  * Store function of the "port_add" attribute of an adapter.
 110  */
 111 static ssize_t
 112 zfcp_sysfs_port_add_store(struct device *dev, const char *buf, size_t count)
 113 {
 114         wwn_t wwpn;
 115         char *endp;
 116         struct zfcp_adapter *adapter;
 117         struct zfcp_port *port;
 118         int retval = -EINVAL;
 119
 120         down(&zfcp_data.config_sema);
 121
 122         adapter = dev_get_drvdata(dev);
 123         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 124                 retval = -EBUSY;
 125                 goto out;
 126         }
 127
 128         wwpn = simple_strtoull(buf, &endp, 0);
 129         if ((endp + 1) < (buf + count))
 130                 goto out;
 131
 132         port = zfcp_port_enqueue(adapter, wwpn, 0);
 133         if (!port)
 134                 goto out;
 135
 136         retval = 0;
 137
 138         zfcp_erp_port_reopen(port, 0);
 139         zfcp_erp_wait(port->adapter);
 140         zfcp_port_put(port);
 141  out:
 142         up(&zfcp_data.config_sema);
 143         return retval ? retval : count;
 144 }
 145
 146 static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store);
 147
 148 /**
 149  * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
 150  * @dev: pointer to belonging device
 151  * @buf: pointer to input buffer
 152  * @count: number of bytes in buffer
 153  *
 154  * Store function of the "port_remove" attribute of an adapter.
 155  */
 156 static ssize_t
 157 zfcp_sysfs_port_remove_store(struct device *dev, const char *buf, size_t count)
 158 {
 159         struct zfcp_adapter *adapter;
 160         struct zfcp_port *port;
 161         wwn_t wwpn;
 162         char *endp;
 163         int retval = 0;
 164
 165         down(&zfcp_data.config_sema);
 166
 167         adapter = dev_get_drvdata(dev);
 168         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 169                 retval = -EBUSY;
 170                 goto out;
 171         }
 172
 173         wwpn = simple_strtoull(buf, &endp, 0);
 174         if ((endp + 1) < (buf + count)) {
 175                 retval = -EINVAL;
 176                 goto out;
 177         }
 178
 179         write_lock_irq(&zfcp_data.config_lock);
 180         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 181         if (port && (atomic_read(&port->refcount) == 0)) {
 182                 zfcp_port_get(port);
 183                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 184                 list_move(&port->list, &adapter->port_remove_lh);
 185         }
 186         else {
 187                 port = NULL;
 188         }
 189         write_unlock_irq(&zfcp_data.config_lock);
 190
 191         if (!port) {
 192                 retval = -ENXIO;
 193                 goto out;
 194         }
 195
 196         zfcp_erp_port_shutdown(port, 0);
 197         zfcp_erp_wait(adapter);
 198         zfcp_port_put(port);
 199         zfcp_port_dequeue(port);
 200  out:
 201         up(&zfcp_data.config_sema);
 202         return retval ? retval : count;
 203 }
 204
 205 static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);
 206
 207 /**
 208  * zfcp_sysfs_adapter_failed_store - failed state of adapter
 209  * @dev: pointer to belonging device
 210  * @buf: pointer to input buffer
 211  * @count: number of bytes in buffer
 212  *
 213  * Store function of the "failed" attribute of an adapter.
 214  * If a "0" gets written to "failed", error recovery will be
 215  * started for the belonging adapter.
 216  */
 217 static ssize_t
 218 zfcp_sysfs_adapter_failed_store(struct device *dev,
 219                                 const char *buf, size_t count)
 220 {
 221         struct zfcp_adapter *adapter;
 222         unsigned int val;
 223         char *endp;
 224         int retval = 0;
 225
 226         down(&zfcp_data.config_sema);
 227
 228         adapter = dev_get_drvdata(dev);
 229         if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
 230                 retval = -EBUSY;
 231                 goto out;
 232         }
 233
 234         val = simple_strtoul(buf, &endp, 0);
 235         if (((endp + 1) < (buf + count)) || (val != 0)) {
 236                 retval = -EINVAL;
 237                 goto out;
 238         }
 239
 240         zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
 241                                        ZFCP_SET);
 242         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
 243         zfcp_erp_wait(adapter);
 244  out:
 245         up(&zfcp_data.config_sema);
 246         return retval ? retval : count;
 247 }
 248
 249 /**
 250  * zfcp_sysfs_adapter_failed_show - failed state of adapter
 251  * @dev: pointer to belonging device
 252  * @buf: pointer to input buffer
 253  *
 254  * Show function of "failed" attribute of adapter. Will be
 255  * "0" if adapter is working, otherwise "1".
 256  */
 257 static ssize_t
 258 zfcp_sysfs_adapter_failed_show(struct device *dev, char *buf)
 259 {
 260         struct zfcp_adapter *adapter;
 261
 262         adapter = dev_get_drvdata(dev);
 263         if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
 264                 return sprintf(buf, "1\n");
 265         else
 266                 return sprintf(buf, "0\n");
 267 }
 268
 269 static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
 270                    zfcp_sysfs_adapter_failed_store);
 271
 272 static struct attribute *zfcp_adapter_attrs[] = {
 273         &dev_attr_failed.attr,
 274         &dev_attr_in_recovery.attr,
 275         &dev_attr_port_remove.attr,
 276         &dev_attr_port_add.attr,
 277         &dev_attr_wwnn.attr,
 278         &dev_attr_wwpn.attr,
 279         &dev_attr_s_id.attr,
 280         &dev_attr_card_version.attr,
 281         &dev_attr_lic_version.attr,
 282         &dev_attr_fc_link_speed.attr,
 283         &dev_attr_fc_service_class.attr,
 284         &dev_attr_fc_topology.attr,
 285         &dev_attr_scsi_host_no.attr,
 286         &dev_attr_status.attr,
 287         &dev_attr_hardware_version.attr,
 288         &dev_attr_serial_number.attr,
 289         NULL
 290 };
 291
 292 static struct attribute_group zfcp_adapter_attr_group = {
 293         .attrs = zfcp_adapter_attrs,
 294 };
 295
 296 /**
 297  * zfcp_sysfs_create_adapter_files - create sysfs adapter files
 298  * @dev: pointer to belonging device
 299  *
 300  * Create all attributes of the sysfs representation of an adapter.
 301  */
 302 int
 303 zfcp_sysfs_adapter_create_files(struct device *dev)
 304 {
 305         return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
 306 }
 307
 308 /**
 309  * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
 310  * @dev: pointer to belonging device
 311  *
 312  * Remove all attributes of the sysfs representation of an adapter.
 313  */
 314 void
 315 zfcp_sysfs_adapter_remove_files(struct device *dev)
 316 {
 317         sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
 318 }
 319
 320 #undef ZFCP_LOG_AREA