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                  adapter->peer_wwnn);
  30 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n",
  31                  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         wwn_t wwpn;
 139         int retval = 0;
 140
 141         down(&zfcp_data.config_sema);
 142         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
 143                 retval = -EBUSY;
 144                 goto out;
 145         }
 146
 147         if (strict_strtoull(buf, 0, &wwpn)) {
 148                 retval = -EINVAL;
 149                 goto out;
 150         }
 151
 152         write_lock_irq(&zfcp_data.config_lock);
 153         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 154         if (port && (atomic_read(&port->refcount) == 0)) {
 155                 zfcp_port_get(port);
 156                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
 157                 list_move(&port->list, &adapter->port_remove_lh);
 158         } else
 159                 port = NULL;
 160         write_unlock_irq(&zfcp_data.config_lock);
 161
 162         if (!port) {
 163                 retval = -ENXIO;
 164                 goto out;
 165         }
 166
 167         zfcp_erp_port_shutdown(port, 0, 92, NULL);
 168         zfcp_erp_wait(adapter);
 169         zfcp_port_put(port);
 170         zfcp_port_dequeue(port);
 171  out:
 172         up(&zfcp_data.config_sema);
 173         return retval ? retval : (ssize_t) count;
 174 }
 175 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 176                      zfcp_sysfs_port_remove_store);
 177
 178 static struct attribute *zfcp_adapter_attrs[] = {
 179         &dev_attr_adapter_failed.attr,
 180         &dev_attr_adapter_in_recovery.attr,
 181         &dev_attr_adapter_port_remove.attr,
 182         &dev_attr_adapter_port_rescan.attr,
 183         &dev_attr_adapter_peer_wwnn.attr,
 184         &dev_attr_adapter_peer_wwpn.attr,
 185         &dev_attr_adapter_peer_d_id.attr,
 186         &dev_attr_adapter_card_version.attr,
 187         &dev_attr_adapter_lic_version.attr,
 188         &dev_attr_adapter_status.attr,
 189         &dev_attr_adapter_hardware_version.attr,
 190         NULL
 191 };
 192
 193 struct attribute_group zfcp_sysfs_adapter_attrs = {
 194         .attrs = zfcp_adapter_attrs,
 195 };
 196
 197 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 198                                          struct device_attribute *attr,
 199                                          const char *buf, size_t count)
 200 {
 201         struct zfcp_port *port = dev_get_drvdata(dev);
 202         struct zfcp_unit *unit;
 203         fcp_lun_t fcp_lun;
 204         int retval = -EINVAL;
 205
 206         down(&zfcp_data.config_sema);
 207         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 208                 retval = -EBUSY;
 209                 goto out;
 210         }
 211
 212         if (strict_strtoull(buf, 0, &fcp_lun))
 213                 goto out;
 214
 215         unit = zfcp_unit_enqueue(port, fcp_lun);
 216         if (IS_ERR(unit))
 217                 goto out;
 218
 219         retval = 0;
 220
 221         zfcp_erp_unit_reopen(unit, 0, 94, NULL);
 222         zfcp_erp_wait(unit->port->adapter);
 223         zfcp_unit_put(unit);
 224 out:
 225         up(&zfcp_data.config_sema);
 226         return retval ? retval : (ssize_t) count;
 227 }
 228 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 229
 230 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 231                                             struct device_attribute *attr,
 232                                             const char *buf, size_t count)
 233 {
 234         struct zfcp_port *port = dev_get_drvdata(dev);
 235         struct zfcp_unit *unit;
 236         fcp_lun_t fcp_lun;
 237         int retval = 0;
 238
 239         down(&zfcp_data.config_sema);
 240         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 241                 retval = -EBUSY;
 242                 goto out;
 243         }
 244
 245         if (strict_strtoull(buf, 0, &fcp_lun)) {
 246                 retval = -EINVAL;
 247                 goto out;
 248         }
 249
 250         write_lock_irq(&zfcp_data.config_lock);
 251         unit = zfcp_get_unit_by_lun(port, fcp_lun);
 252         if (unit && (atomic_read(&unit->refcount) == 0)) {
 253                 zfcp_unit_get(unit);
 254                 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
 255                 list_move(&unit->list, &port->unit_remove_lh);
 256         } else
 257                 unit = NULL;
 258
 259         write_unlock_irq(&zfcp_data.config_lock);
 260
 261         if (!unit) {
 262                 retval = -ENXIO;
 263                 goto out;
 264         }
 265
 266         zfcp_erp_unit_shutdown(unit, 0, 95, NULL);
 267         zfcp_erp_wait(unit->port->adapter);
 268         zfcp_unit_put(unit);
 269         zfcp_unit_dequeue(unit);
 270 out:
 271         up(&zfcp_data.config_sema);
 272         return retval ? retval : (ssize_t) count;
 273 }
 274 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 275
 276 static struct attribute *zfcp_port_ns_attrs[] = {
 277         &dev_attr_port_failed.attr,
 278         &dev_attr_port_in_recovery.attr,
 279         &dev_attr_port_status.attr,
 280         &dev_attr_port_access_denied.attr,
 281         NULL
 282 };
 283
 284 /**
 285  * zfcp_sysfs_ns_port_attrs - sysfs attributes for nameserver
 286  */
 287 struct attribute_group zfcp_sysfs_ns_port_attrs = {
 288         .attrs = zfcp_port_ns_attrs,
 289 };
 290
 291 static struct attribute *zfcp_port_no_ns_attrs[] = {
 292         &dev_attr_unit_add.attr,
 293         &dev_attr_unit_remove.attr,
 294         &dev_attr_port_failed.attr,
 295         &dev_attr_port_in_recovery.attr,
 296         &dev_attr_port_status.attr,
 297         &dev_attr_port_access_denied.attr,
 298         NULL
 299 };
 300
 301 /**
 302  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
 303  */
 304 struct attribute_group zfcp_sysfs_port_attrs = {
 305         .attrs = zfcp_port_no_ns_attrs,
 306 };
 307
 308 static struct attribute *zfcp_unit_attrs[] = {
 309         &dev_attr_unit_failed.attr,
 310         &dev_attr_unit_in_recovery.attr,
 311         &dev_attr_unit_status.attr,
 312         &dev_attr_unit_access_denied.attr,
 313         &dev_attr_unit_access_shared.attr,
 314         &dev_attr_unit_access_readonly.attr,
 315         NULL
 316 };
 317
 318 struct attribute_group zfcp_sysfs_unit_attrs = {
 319         .attrs = zfcp_unit_attrs,
 320 };
 321
 322 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 323 static ssize_t                                                          \
 324 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 325                                        struct device_attribute *attr,   \
 326                                        char *buf) {                     \
 327         struct scsi_device *sdev = to_scsi_device(dev);                 \
 328         struct zfcp_unit *unit = sdev->hostdata;                        \
 329         struct zfcp_latencies *lat = &unit->latencies;                  \
 330         struct zfcp_adapter *adapter = unit->port->adapter;             \
 331         unsigned long flags;                                            \
 332         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 333                                                                         \
 334         spin_lock_irqsave(&lat->lock, flags);                           \
 335         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 336         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 337         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 338         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 339         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 340         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 341         cc  = lat->_name.counter;                                       \
 342         spin_unlock_irqrestore(&lat->lock, flags);                      \
 343                                                                         \
 344         do_div(fsum, 1000);                                             \
 345         do_div(fmin, 1000);                                             \
 346         do_div(fmax, 1000);                                             \
 347         do_div(csum, 1000);                                             \
 348         do_div(cmin, 1000);                                             \
 349         do_div(cmax, 1000);                                             \
 350                                                                         \
 351         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 352                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 353 }                                                                       \
 354 static ssize_t                                                          \
 355 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 356                                         struct device_attribute *attr,  \
 357                                         const char *buf, size_t count)  \
 358 {                                                                       \
 359         struct scsi_device *sdev = to_scsi_device(dev);                 \
 360         struct zfcp_unit *unit = sdev->hostdata;                        \
 361         struct zfcp_latencies *lat = &unit->latencies;                  \
 362         unsigned long flags;                                            \
 363                                                                         \
 364         spin_lock_irqsave(&lat->lock, flags);                           \
 365         lat->_name.fabric.sum = 0;                                      \
 366         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 367         lat->_name.fabric.max = 0;                                      \
 368         lat->_name.channel.sum = 0;                                     \
 369         lat->_name.channel.min = 0xFFFFFFFF;                            \
 370         lat->_name.channel.max = 0;                                     \
 371         lat->_name.counter = 0;                                         \
 372         spin_unlock_irqrestore(&lat->lock, flags);                      \
 373                                                                         \
 374         return (ssize_t) count;                                         \
 375 }                                                                       \
 376 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 377                    zfcp_sysfs_unit_##_name##_latency_show,              \
 378                    zfcp_sysfs_unit_##_name##_latency_store);
 379
 380 ZFCP_DEFINE_LATENCY_ATTR(read);
 381 ZFCP_DEFINE_LATENCY_ATTR(write);
 382 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 383
 384 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 385 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 386                                               struct device_attribute *attr,\
 387                                               char *buf)                 \
 388 {                                                                        \
 389         struct scsi_device *sdev  = to_scsi_device(dev);                 \
 390         struct zfcp_unit *unit = sdev->hostdata;                         \
 391                                                                          \
 392         return sprintf(buf, _format, _value);                            \
 393 }                                                                        \
 394 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 395
 396 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 397         unit->port->adapter->ccw_device->dev.bus_id);
 398 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn);
 399 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun);
 400
 401 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 402         &dev_attr_fcp_lun,
 403         &dev_attr_wwpn,
 404         &dev_attr_hba_id,
 405         &dev_attr_read_latency,
 406         &dev_attr_write_latency,
 407         &dev_attr_cmd_latency,
 408         NULL
 409 };
 410
 411 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 412                                             struct device_attribute *attr,
 413                                             char *buf)
 414 {
 415         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 416         struct fsf_qtcb_bottom_port *qtcb_port;
 417         struct zfcp_adapter *adapter;
 418         int retval;
 419
 420         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 421         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 422                 return -EOPNOTSUPP;
 423
 424         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 425         if (!qtcb_port)
 426                 return -ENOMEM;
 427
 428         retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
 429         if (!retval)
 430                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 431                                  qtcb_port->cb_util, qtcb_port->a_util);
 432         kfree(qtcb_port);
 433         return retval;
 434 }
 435 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 436
 437 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 438                                         struct fsf_statistics_info *stat_inf)
 439 {
 440         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 441         struct fsf_qtcb_bottom_config *qtcb_config;
 442         struct zfcp_adapter *adapter;
 443         int retval;
 444
 445         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 446         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 447                 return -EOPNOTSUPP;
 448
 449         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 450                               GFP_KERNEL);
 451         if (!qtcb_config)
 452                 return -ENOMEM;
 453
 454         retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
 455         if (!retval)
 456                 *stat_inf = qtcb_config->stat_info;
 457
 458         kfree(qtcb_config);
 459         return retval;
 460 }
 461
 462 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 463 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 464                                                  struct device_attribute *attr,\
 465                                                  char *buf)             \
 466 {                                                                       \
 467         struct fsf_statistics_info stat_info;                           \
 468         int retval;                                                     \
 469                                                                         \
 470         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 471         if (retval)                                                     \
 472                 return retval;                                          \
 473                                                                         \
 474         return sprintf(buf, _format, ## _arg);                          \
 475 }                                                                       \
 476 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 477
 478 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 479                 (unsigned long long) stat_info.input_req,
 480                 (unsigned long long) stat_info.output_req,
 481                 (unsigned long long) stat_info.control_req);
 482
 483 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 484                 (unsigned long long) stat_info.input_mb,
 485                 (unsigned long long) stat_info.output_mb);
 486
 487 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 488                 (unsigned long long) stat_info.seconds_act);
 489
 490 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 491         &dev_attr_utilization,
 492         &dev_attr_requests,
 493         &dev_attr_megabytes,
 494         &dev_attr_seconds_active,
 495         NULL
 496 };