git.oblomov.eu Git - linux-2.6/blob - drivers/s390/scsi/zfcp_sysfs.c

   1 /*
   2  * zfcp device driver
   3  *
   4  * sysfs attributes.
   5  *
   6  * Copyright IBM Corporation 2008
   7  */
   8
   9 #include "zfcp_ext.h"
  10
  11 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
  12 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
  13                                                             _show, _store)
  14 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
  15 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  16                                                    struct device_attribute *at,\
  17                                                    char *buf)                  \
  18 {                                                                              \
  19         struct _feat_def *_feat = dev_get_drvdata(dev);                        \
  20                                                                                \
  21         return sprintf(buf, _format, _value);                                  \
  22 }                                                                              \
  23 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  24                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  25
  26 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n",
  27                  atomic_read(&adapter->status));
  28 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n",
  29                  (unsigned long long) adapter->peer_wwnn);
  30 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n",
  31                  (unsigned long long) adapter->peer_wwpn);
  32 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n",
  33                  adapter->peer_d_id);
  34 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n",
  35                  adapter->hydra_version);
  36 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n",
  37                  adapter->fsf_lic_version);
  38 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n",
  39                  adapter->hardware_version);
  40 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n",
  41                  (atomic_read(&adapter->status) &
  42                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  43
  44 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  45                  atomic_read(&port->status));
  46 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  47                  (atomic_read(&port->status) &
  48                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  49 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
  50                  (atomic_read(&port->status) &
  51                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  52
  53 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  54                  atomic_read(&unit->status));
  55 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  56                  (atomic_read(&unit->status) &
  57                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  58 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  59                  (atomic_read(&unit->status) &
  60                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  61 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
  62                  (atomic_read(&unit->status) &
  63                   ZFCP_STATUS_UNIT_SHARED) != 0);
  64 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
  65                  (atomic_read(&unit->status) &
  66                   ZFCP_STATUS_UNIT_READONLY) != 0);
  67
  68 #define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id)     \
  69 static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev,            \
  70                                                 struct device_attribute *attr, \
  71                                                 char *buf)                     \
  72 {                                                                              \
  73         struct _feat_def *_feat = dev_get_drvdata(dev);                        \
  74                                                                                \
  75         if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED)       \
  76                 return sprintf(buf, "1\n");                                    \
  77         else                                                                   \
  78                 return sprintf(buf, "0\n");                                    \
  79 }                                                                              \
  80 static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev,           \
  81                                                  struct device_attribute *attr,\
  82                                                  const char *buf, size_t count)\
  83 {                                                                              \
  84         struct _feat_def *_feat = dev_get_drvdata(dev);                        \
  85         unsigned long val;                                                     \
  86         int retval = 0;                                                        \
  87                                                                                \
  88         down(&zfcp_data.config_sema);                                          \
  89         if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) {         \
  90                 retval = -EBUSY;                                               \
  91                 goto out;                                                      \
  92         }                                                                      \
  93                                                                                \
  94         if (strict_strtoul(buf, 0, &val) || val != 0) {                        \
  95                 retval = -EINVAL;                                              \
  96                 goto out;                                                      \
  97         }                                                                      \
  98                                                                                \
  99         zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL,                 \
 100                                          ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
 101         zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED,        \
 102                                   _reopen_id, NULL);                           \
 103         zfcp_erp_wait(_adapter);                                               \
 104 out:                                                                           \
 105         up(&zfcp_data.config_sema);                                            \
 106         return retval ? retval : (ssize_t) count;                              \
 107 }                                                                              \
 108 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,                         \
 109                      zfcp_sysfs_##_feat##_failed_show,                         \
 110                      zfcp_sysfs_##_feat##_failed_store);
 111
 112 ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, 44, 93);
 113 ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, 45, 96);
 114 ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, 46, 97);
 115
 116 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 117                                             struct device_attribute *attr,
 118                                             const char *buf, size_t count)
 119 {
 120         struct zfcp_adapter *adapter = dev_get_drvdata(dev);
 121         int ret;
 122
 123         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE)
 124                 return -EBUSY;
 125
 126         ret = zfcp_scan_ports(adapter);
 127         return ret ? ret : (ssize_t) count;
 128 }
 129 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 130                      zfcp_sysfs_port_rescan_store);
 131
 132 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 133                                             struct device_attribute *attr,
 134                                             const char *buf, size_t count)
 135 {
 136         struct zfcp_adapter *adapter = dev_get_drvdata(dev);
 137         struct zfcp_port *port;
 138         u64 wwpn;
 139         int retval = 0;
 140         LIST_HEAD(port_remove_lh);
 141
 142         down(&zfcp_data.config_sema);
 143         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
 144                 retval = -EBUSY;
 145                 goto out;
 146         }
 147
 148         if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) {
 149                 retval = -EINVAL;
 150                 goto out;
 151         }
 152
 153         write_lock_irq(&zfcp_data.config_lock);
 154         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 155         if (port && (atomic_read(&port->refcount) == 0)) {
 156                 zfcp_port_get(port);
 157                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 158                 list_move(&port->list, &port_remove_lh);
 159         } else
 160                 port = NULL;
 161         write_unlock_irq(&zfcp_data.config_lock);
 162
 163         if (!port) {
 164                 retval = -ENXIO;
 165                 goto out;
 166         }
 167
 168         zfcp_erp_port_shutdown(port, 0, 92, NULL);
 169         zfcp_erp_wait(adapter);
 170         zfcp_port_put(port);
 171         zfcp_port_dequeue(port);
 172  out:
 173         up(&zfcp_data.config_sema);
 174         return retval ? retval : (ssize_t) count;
 175 }
 176 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 177                      zfcp_sysfs_port_remove_store);
 178
 179 static struct attribute *zfcp_adapter_attrs[] = {
 180         &dev_attr_adapter_failed.attr,
 181         &dev_attr_adapter_in_recovery.attr,
 182         &dev_attr_adapter_port_remove.attr,
 183         &dev_attr_adapter_port_rescan.attr,
 184         &dev_attr_adapter_peer_wwnn.attr,
 185         &dev_attr_adapter_peer_wwpn.attr,
 186         &dev_attr_adapter_peer_d_id.attr,
 187         &dev_attr_adapter_card_version.attr,
 188         &dev_attr_adapter_lic_version.attr,
 189         &dev_attr_adapter_status.attr,
 190         &dev_attr_adapter_hardware_version.attr,
 191         NULL
 192 };
 193
 194 struct attribute_group zfcp_sysfs_adapter_attrs = {
 195         .attrs = zfcp_adapter_attrs,
 196 };
 197
 198 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 199                                          struct device_attribute *attr,
 200                                          const char *buf, size_t count)
 201 {
 202         struct zfcp_port *port = dev_get_drvdata(dev);
 203         struct zfcp_unit *unit;
 204         u64 fcp_lun;
 205         int retval = -EINVAL;
 206
 207         down(&zfcp_data.config_sema);
 208         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 209                 retval = -EBUSY;
 210                 goto out;
 211         }
 212
 213         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
 214                 goto out;
 215
 216         unit = zfcp_unit_enqueue(port, fcp_lun);
 217         if (IS_ERR(unit))
 218                 goto out;
 219
 220         retval = 0;
 221
 222         zfcp_erp_unit_reopen(unit, 0, 94, NULL);
 223         zfcp_erp_wait(unit->port->adapter);
 224         zfcp_unit_put(unit);
 225 out:
 226         up(&zfcp_data.config_sema);
 227         return retval ? retval : (ssize_t) count;
 228 }
 229 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 230
 231 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 232                                             struct device_attribute *attr,
 233                                             const char *buf, size_t count)
 234 {
 235         struct zfcp_port *port = dev_get_drvdata(dev);
 236         struct zfcp_unit *unit;
 237         u64 fcp_lun;
 238         int retval = 0;
 239         LIST_HEAD(unit_remove_lh);
 240
 241         down(&zfcp_data.config_sema);
 242         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 243                 retval = -EBUSY;
 244                 goto out;
 245         }
 246
 247         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
 248                 retval = -EINVAL;
 249                 goto out;
 250         }
 251
 252         write_lock_irq(&zfcp_data.config_lock);
 253         unit = zfcp_get_unit_by_lun(port, fcp_lun);
 254         if (unit && (atomic_read(&unit->refcount) == 0)) {
 255                 zfcp_unit_get(unit);
 256                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
 257                 list_move(&unit->list, &unit_remove_lh);
 258         } else
 259                 unit = NULL;
 260
 261         write_unlock_irq(&zfcp_data.config_lock);
 262
 263         if (!unit) {
 264                 retval = -ENXIO;
 265                 goto out;
 266         }
 267
 268         zfcp_erp_unit_shutdown(unit, 0, 95, NULL);
 269         zfcp_erp_wait(unit->port->adapter);
 270         zfcp_unit_put(unit);
 271         zfcp_unit_dequeue(unit);
 272 out:
 273         up(&zfcp_data.config_sema);
 274         return retval ? retval : (ssize_t) count;
 275 }
 276 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 277
 278 static struct attribute *zfcp_port_attrs[] = {
 279         &dev_attr_unit_add.attr,
 280         &dev_attr_unit_remove.attr,
 281         &dev_attr_port_failed.attr,
 282         &dev_attr_port_in_recovery.attr,
 283         &dev_attr_port_status.attr,
 284         &dev_attr_port_access_denied.attr,
 285         NULL
 286 };
 287
 288 /**
 289  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 290  */
 291 struct attribute_group zfcp_sysfs_port_attrs = {
 292         .attrs = zfcp_port_attrs,
 293 };
 294
 295 static struct attribute *zfcp_unit_attrs[] = {
 296         &dev_attr_unit_failed.attr,
 297         &dev_attr_unit_in_recovery.attr,
 298         &dev_attr_unit_status.attr,
 299         &dev_attr_unit_access_denied.attr,
 300         &dev_attr_unit_access_shared.attr,
 301         &dev_attr_unit_access_readonly.attr,
 302         NULL
 303 };
 304
 305 struct attribute_group zfcp_sysfs_unit_attrs = {
 306         .attrs = zfcp_unit_attrs,
 307 };
 308
 309 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 310 static ssize_t                                                          \
 311 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 312                                        struct device_attribute *attr,   \
 313                                        char *buf) {                     \
 314         struct scsi_device *sdev = to_scsi_device(dev);                 \
 315         struct zfcp_unit *unit = sdev->hostdata;                        \
 316         struct zfcp_latencies *lat = &unit->latencies;                  \
 317         struct zfcp_adapter *adapter = unit->port->adapter;             \
 318         unsigned long flags;                                            \
 319         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 320                                                                         \
 321         spin_lock_irqsave(&lat->lock, flags);                           \
 322         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 323         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 324         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 325         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 326         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 327         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 328         cc  = lat->_name.counter;                                       \
 329         spin_unlock_irqrestore(&lat->lock, flags);                      \
 330                                                                         \
 331         do_div(fsum, 1000);                                             \
 332         do_div(fmin, 1000);                                             \
 333         do_div(fmax, 1000);                                             \
 334         do_div(csum, 1000);                                             \
 335         do_div(cmin, 1000);                                             \
 336         do_div(cmax, 1000);                                             \
 337                                                                         \
 338         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 339                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 340 }                                                                       \
 341 static ssize_t                                                          \
 342 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 343                                         struct device_attribute *attr,  \
 344                                         const char *buf, size_t count)  \
 345 {                                                                       \
 346         struct scsi_device *sdev = to_scsi_device(dev);                 \
 347         struct zfcp_unit *unit = sdev->hostdata;                        \
 348         struct zfcp_latencies *lat = &unit->latencies;                  \
 349         unsigned long flags;                                            \
 350                                                                         \
 351         spin_lock_irqsave(&lat->lock, flags);                           \
 352         lat->_name.fabric.sum = 0;                                      \
 353         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 354         lat->_name.fabric.max = 0;                                      \
 355         lat->_name.channel.sum = 0;                                     \
 356         lat->_name.channel.min = 0xFFFFFFFF;                            \
 357         lat->_name.channel.max = 0;                                     \
 358         lat->_name.counter = 0;                                         \
 359         spin_unlock_irqrestore(&lat->lock, flags);                      \
 360                                                                         \
 361         return (ssize_t) count;                                         \
 362 }                                                                       \
 363 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 364                    zfcp_sysfs_unit_##_name##_latency_show,              \
 365                    zfcp_sysfs_unit_##_name##_latency_store);
 366
 367 ZFCP_DEFINE_LATENCY_ATTR(read);
 368 ZFCP_DEFINE_LATENCY_ATTR(write);
 369 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 370
 371 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 372 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 373                                               struct device_attribute *attr,\
 374                                               char *buf)                 \
 375 {                                                                        \
 376         struct scsi_device *sdev  = to_scsi_device(dev);                 \
 377         struct zfcp_unit *unit = sdev->hostdata;                         \
 378                                                                          \
 379         return sprintf(buf, _format, _value);                            \
 380 }                                                                        \
 381 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 382
 383 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 384                       dev_name(&unit->port->adapter->ccw_device->dev));
 385 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 386                       (unsigned long long) unit->port->wwpn);
 387 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
 388                       (unsigned long long) unit->fcp_lun);
 389
 390 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 391         &dev_attr_fcp_lun,
 392         &dev_attr_wwpn,
 393         &dev_attr_hba_id,
 394         &dev_attr_read_latency,
 395         &dev_attr_write_latency,
 396         &dev_attr_cmd_latency,
 397         NULL
 398 };
 399
 400 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 401                                             struct device_attribute *attr,
 402                                             char *buf)
 403 {
 404         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 405         struct fsf_qtcb_bottom_port *qtcb_port;
 406         struct zfcp_adapter *adapter;
 407         int retval;
 408
 409         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 410         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 411                 return -EOPNOTSUPP;
 412
 413         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 414         if (!qtcb_port)
 415                 return -ENOMEM;
 416
 417         retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
 418         if (!retval)
 419                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 420                                  qtcb_port->cb_util, qtcb_port->a_util);
 421         kfree(qtcb_port);
 422         return retval;
 423 }
 424 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 425
 426 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 427                                         struct fsf_statistics_info *stat_inf)
 428 {
 429         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 430         struct fsf_qtcb_bottom_config *qtcb_config;
 431         struct zfcp_adapter *adapter;
 432         int retval;
 433
 434         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 435         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 436                 return -EOPNOTSUPP;
 437
 438         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 439                               GFP_KERNEL);
 440         if (!qtcb_config)
 441                 return -ENOMEM;
 442
 443         retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
 444         if (!retval)
 445                 *stat_inf = qtcb_config->stat_info;
 446
 447         kfree(qtcb_config);
 448         return retval;
 449 }
 450
 451 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 452 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 453                                                  struct device_attribute *attr,\
 454                                                  char *buf)             \
 455 {                                                                       \
 456         struct fsf_statistics_info stat_info;                           \
 457         int retval;                                                     \
 458                                                                         \
 459         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 460         if (retval)                                                     \
 461                 return retval;                                          \
 462                                                                         \
 463         return sprintf(buf, _format, ## _arg);                          \
 464 }                                                                       \
 465 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 466
 467 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 468                 (unsigned long long) stat_info.input_req,
 469                 (unsigned long long) stat_info.output_req,
 470                 (unsigned long long) stat_info.control_req);
 471
 472 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 473                 (unsigned long long) stat_info.input_mb,
 474                 (unsigned long long) stat_info.output_mb);
 475
 476 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 477                 (unsigned long long) stat_info.seconds_act);
 478
 479 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 480                                               struct device_attribute *attr,
 481                                               char *buf)
 482 {
 483         struct Scsi_Host *scsi_host = class_to_shost(dev);
 484         struct zfcp_adapter *adapter =
 485                 (struct zfcp_adapter *) scsi_host->hostdata[0];
 486
 487         return sprintf(buf, "%d\n", atomic_read(&adapter->qdio_outb_full));
 488 }
 489 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 490
 491 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 492         &dev_attr_utilization,
 493         &dev_attr_requests,
 494         &dev_attr_megabytes,
 495         &dev_attr_seconds_active,
 496         &dev_attr_queue_full,
 497         NULL
 498 };