drivers/s390/scsi/zfcp_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * zfcp device driver
   4  *
   5  * sysfs attributes.
   6  *
   7  * Copyright IBM Corp. 2008, 2020
   8  */
   9
  10 #define KMSG_COMPONENT "zfcp"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/slab.h>
  14 #include "zfcp_diag.h"
  15 #include "zfcp_ext.h"
  16
  17 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
  18 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
  19                                                             _show, _store)
  20 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
  21 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  22                                                    struct device_attribute *at,\
  23                                                    char *buf)                  \
  24 {                                                                              \
  25         struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
  26                                                                                \
  27         return sysfs_emit(buf, _format, _value);                               \
  28 }                                                                              \
  29 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  30                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  31
  32 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value)                  \
  33 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
  34                                                    struct device_attribute *at,\
  35                                                    char *buf)                  \
  36 {                                                                              \
  37         return sysfs_emit(buf, _format, _value);                               \
  38 }                                                                              \
  39 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
  40                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
  41
  42 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)                           \
  43 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
  44                                                  struct device_attribute *at,\
  45                                                  char *buf)                  \
  46 {                                                                            \
  47         struct ccw_device *cdev = to_ccwdev(dev);                            \
  48         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
  49         int i;                                                               \
  50                                                                              \
  51         if (!adapter)                                                        \
  52                 return -ENODEV;                                              \
  53                                                                              \
  54         i = sysfs_emit(buf, _format, _value);                                \
  55         zfcp_ccw_adapter_put(adapter);                                       \
  56         return i;                                                            \
  57 }                                                                            \
  58 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                                \
  59                      zfcp_sysfs_adapter_##_name##_show, NULL);
  60
  61 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
  62 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
  63                    (unsigned long long) adapter->peer_wwnn);
  64 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
  65                    (unsigned long long) adapter->peer_wwpn);
  66 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
  67 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
  68 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
  69 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
  70 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
  71                                          ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  72
  73 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
  74                  atomic_read(&port->status));
  75 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
  76                  (atomic_read(&port->status) &
  77                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  78 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
  79
  80 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
  81                  zfcp_unit_sdev_status(unit));
  82 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
  83                  (zfcp_unit_sdev_status(unit) &
  84                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
  85 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
  86                  (zfcp_unit_sdev_status(unit) &
  87                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
  88 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
  89 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
  90
  91 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
  92                                            struct device_attribute *attr,
  93                                            char *buf)
  94 {
  95         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
  96
  97         if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
  98                 return sysfs_emit(buf, "1\n");
  99
 100         return sysfs_emit(buf, "0\n");
 101 }
 102
 103 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
 104                                             struct device_attribute *attr,
 105                                             const char *buf, size_t count)
 106 {
 107         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 108         unsigned long val;
 109
 110         if (kstrtoul(buf, 0, &val) || val != 0)
 111                 return -EINVAL;
 112
 113         zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
 114         zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
 115         zfcp_erp_wait(port->adapter);
 116
 117         return count;
 118 }
 119 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
 120                      zfcp_sysfs_port_failed_show,
 121                      zfcp_sysfs_port_failed_store);
 122
 123 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
 124                                            struct device_attribute *attr,
 125                                            char *buf)
 126 {
 127         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 128         struct scsi_device *sdev;
 129         unsigned int status, failed = 1;
 130
 131         sdev = zfcp_unit_sdev(unit);
 132         if (sdev) {
 133                 status = atomic_read(&sdev_to_zfcp(sdev)->status);
 134                 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 135                 scsi_device_put(sdev);
 136         }
 137
 138         return sysfs_emit(buf, "%d\n", failed);
 139 }
 140
 141 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
 142                                             struct device_attribute *attr,
 143                                             const char *buf, size_t count)
 144 {
 145         struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
 146         unsigned long val;
 147         struct scsi_device *sdev;
 148
 149         if (kstrtoul(buf, 0, &val) || val != 0)
 150                 return -EINVAL;
 151
 152         sdev = zfcp_unit_sdev(unit);
 153         if (sdev) {
 154                 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 155                 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 156                                     "syufai2");
 157                 zfcp_erp_wait(unit->port->adapter);
 158         } else
 159                 zfcp_unit_scsi_scan(unit);
 160
 161         return count;
 162 }
 163 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
 164                      zfcp_sysfs_unit_failed_show,
 165                      zfcp_sysfs_unit_failed_store);
 166
 167 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
 168                                               struct device_attribute *attr,
 169                                               char *buf)
 170 {
 171         struct ccw_device *cdev = to_ccwdev(dev);
 172         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 173         int i;
 174
 175         if (!adapter)
 176                 return -ENODEV;
 177
 178         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
 179                 i = sysfs_emit(buf, "1\n");
 180         else
 181                 i = sysfs_emit(buf, "0\n");
 182
 183         zfcp_ccw_adapter_put(adapter);
 184         return i;
 185 }
 186
 187 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
 188                                                struct device_attribute *attr,
 189                                                const char *buf, size_t count)
 190 {
 191         struct ccw_device *cdev = to_ccwdev(dev);
 192         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 193         unsigned long val;
 194         int retval = 0;
 195
 196         if (!adapter)
 197                 return -ENODEV;
 198
 199         if (kstrtoul(buf, 0, &val) || val != 0) {
 200                 retval = -EINVAL;
 201                 goto out;
 202         }
 203
 204         zfcp_erp_adapter_reset_sync(adapter, "syafai2");
 205 out:
 206         zfcp_ccw_adapter_put(adapter);
 207         return retval ? retval : (ssize_t) count;
 208 }
 209 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
 210                      zfcp_sysfs_adapter_failed_show,
 211                      zfcp_sysfs_adapter_failed_store);
 212
 213 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
 214                                             struct device_attribute *attr,
 215                                             const char *buf, size_t count)
 216 {
 217         struct ccw_device *cdev = to_ccwdev(dev);
 218         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 219         int retval = 0;
 220
 221         if (!adapter)
 222                 return -ENODEV;
 223
 224         /*
 225          * If `scsi_host` is missing, we can't schedule `scan_work`, as it
 226          * makes use of the corresponding fc_host object. But this state is
 227          * only possible if xconfig/xport data has never completed yet,
 228          * and we couldn't successfully scan for ports anyway.
 229          */
 230         if (adapter->scsi_host == NULL) {
 231                 retval = -ENODEV;
 232                 goto out;
 233         }
 234
 235         /*
 236          * Users wish is our command: immediately schedule and flush a
 237          * worker to conduct a synchronous port scan, that is, neither
 238          * a random delay nor a rate limit is applied here.
 239          */
 240         queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
 241         flush_delayed_work(&adapter->scan_work);
 242 out:
 243         zfcp_ccw_adapter_put(adapter);
 244         return retval ? retval : (ssize_t) count;
 245 }
 246 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 247                      zfcp_sysfs_port_rescan_store);
 248
 249 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
 250
 251 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
 252 {
 253         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 254         atomic_set(&port->units, -1);
 255 }
 256
 257 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
 258 {
 259         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 260         return atomic_read(&port->units) == -1;
 261 }
 262
 263 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
 264 {
 265         struct zfcp_adapter *const adapter = port->adapter;
 266         unsigned long flags;
 267         struct scsi_device *sdev;
 268         bool in_use = true;
 269
 270         mutex_lock(&zfcp_sysfs_port_units_mutex);
 271         if (atomic_read(&port->units) > 0)
 272                 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
 273
 274         spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
 275         __shost_for_each_device(sdev, adapter->scsi_host) {
 276                 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
 277
 278                 if (sdev->sdev_state == SDEV_DEL ||
 279                     sdev->sdev_state == SDEV_CANCEL)
 280                         continue;
 281                 if (zsdev->port != port)
 282                         continue;
 283                 /* alive scsi_device under port of interest */
 284                 goto unlock_host_lock;
 285         }
 286
 287         /* port is about to be removed, so no more unit_add or slave_alloc */
 288         zfcp_sysfs_port_set_removing(port);
 289         in_use = false;
 290
 291 unlock_host_lock:
 292         spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
 293 unlock_port_units_mutex:
 294         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 295         return in_use;
 296 }
 297
 298 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 299                                             struct device_attribute *attr,
 300                                             const char *buf, size_t count)
 301 {
 302         struct ccw_device *cdev = to_ccwdev(dev);
 303         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 304         struct zfcp_port *port;
 305         u64 wwpn;
 306         int retval = -EINVAL;
 307
 308         if (!adapter)
 309                 return -ENODEV;
 310
 311         if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 312                 goto out;
 313
 314         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 315         if (!port)
 316                 goto out;
 317         else
 318                 retval = 0;
 319
 320         if (zfcp_sysfs_port_in_use(port)) {
 321                 retval = -EBUSY;
 322                 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
 323                 goto out;
 324         }
 325
 326         write_lock_irq(&adapter->port_list_lock);
 327         list_del(&port->list);
 328         write_unlock_irq(&adapter->port_list_lock);
 329
 330         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 331         device_unregister(&port->dev);
 332
 333         put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
 334  out:
 335         zfcp_ccw_adapter_put(adapter);
 336         return retval ? retval : (ssize_t) count;
 337 }
 338 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 339                      zfcp_sysfs_port_remove_store);
 340
 341 static ssize_t
 342 zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
 343                                      struct device_attribute *attr, char *buf)
 344 {
 345         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
 346         ssize_t rc;
 347
 348         if (!adapter)
 349                 return -ENODEV;
 350
 351         rc = sysfs_emit(buf, "%lu\n", adapter->diagnostics->max_age);
 352
 353         zfcp_ccw_adapter_put(adapter);
 354         return rc;
 355 }
 356
 357 static ssize_t
 358 zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
 359                                       struct device_attribute *attr,
 360                                       const char *buf, size_t count)
 361 {
 362         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
 363         unsigned long max_age;
 364         ssize_t rc;
 365
 366         if (!adapter)
 367                 return -ENODEV;
 368
 369         rc = kstrtoul(buf, 10, &max_age);
 370         if (rc != 0)
 371                 goto out;
 372
 373         adapter->diagnostics->max_age = max_age;
 374
 375         rc = count;
 376 out:
 377         zfcp_ccw_adapter_put(adapter);
 378         return rc;
 379 }
 380 static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
 381                      zfcp_sysfs_adapter_diag_max_age_show,
 382                      zfcp_sysfs_adapter_diag_max_age_store);
 383
 384 static ssize_t zfcp_sysfs_adapter_fc_security_show(
 385         struct device *dev, struct device_attribute *attr, char *buf)
 386 {
 387         struct ccw_device *cdev = to_ccwdev(dev);
 388         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 389         unsigned int status;
 390         int i;
 391
 392         if (!adapter)
 393                 return -ENODEV;
 394
 395         /*
 396          * Adapter status COMMON_OPEN implies xconf data and xport data
 397          * was done. Adapter FC Endpoint Security capability remains
 398          * unchanged in case of COMMON_ERP_FAILED (e.g. due to local link
 399          * down).
 400          */
 401         status = atomic_read(&adapter->status);
 402         if (0 == (status & ZFCP_STATUS_COMMON_OPEN))
 403                 i = sysfs_emit(buf, "unknown\n");
 404         else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
 405                 i = sysfs_emit(buf, "unsupported\n");
 406         else {
 407                 i = zfcp_fsf_scnprint_fc_security(
 408                         buf, PAGE_SIZE - 1, adapter->fc_security_algorithms,
 409                         ZFCP_FSF_PRINT_FMT_LIST);
 410                 i += sysfs_emit_at(buf, i, "\n");
 411         }
 412
 413         zfcp_ccw_adapter_put(adapter);
 414         return i;
 415 }
 416 static ZFCP_DEV_ATTR(adapter, fc_security, S_IRUGO,
 417                      zfcp_sysfs_adapter_fc_security_show,
 418                      NULL);
 419
 420 static struct attribute *zfcp_adapter_attrs[] = {
 421         &dev_attr_adapter_failed.attr,
 422         &dev_attr_adapter_in_recovery.attr,
 423         &dev_attr_adapter_port_remove.attr,
 424         &dev_attr_adapter_port_rescan.attr,
 425         &dev_attr_adapter_peer_wwnn.attr,
 426         &dev_attr_adapter_peer_wwpn.attr,
 427         &dev_attr_adapter_peer_d_id.attr,
 428         &dev_attr_adapter_card_version.attr,
 429         &dev_attr_adapter_lic_version.attr,
 430         &dev_attr_adapter_status.attr,
 431         &dev_attr_adapter_hardware_version.attr,
 432         &dev_attr_adapter_diag_max_age.attr,
 433         &dev_attr_adapter_fc_security.attr,
 434         NULL
 435 };
 436
 437 static const struct attribute_group zfcp_sysfs_adapter_attr_group = {
 438         .attrs = zfcp_adapter_attrs,
 439 };
 440
 441 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 442                                          struct device_attribute *attr,
 443                                          const char *buf, size_t count)
 444 {
 445         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 446         u64 fcp_lun;
 447         int retval;
 448
 449         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 450                 return -EINVAL;
 451
 452         retval = zfcp_unit_add(port, fcp_lun);
 453         if (retval)
 454                 return retval;
 455
 456         return count;
 457 }
 458 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 459
 460 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 461                                             struct device_attribute *attr,
 462                                             const char *buf, size_t count)
 463 {
 464         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 465         u64 fcp_lun;
 466
 467         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 468                 return -EINVAL;
 469
 470         if (zfcp_unit_remove(port, fcp_lun))
 471                 return -EINVAL;
 472
 473         return count;
 474 }
 475 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 476
 477 static ssize_t zfcp_sysfs_port_fc_security_show(struct device *dev,
 478                                                 struct device_attribute *attr,
 479                                                 char *buf)
 480 {
 481         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 482         struct zfcp_adapter *adapter = port->adapter;
 483         unsigned int status = atomic_read(&port->status);
 484         int i;
 485
 486         if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
 487             0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
 488             0 == (status & ZFCP_STATUS_PORT_PHYS_OPEN) ||
 489             0 != (status & ZFCP_STATUS_PORT_LINK_TEST) ||
 490             0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
 491             0 != (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
 492                 i = sysfs_emit(buf, "unknown\n");
 493         else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
 494                 i = sysfs_emit(buf, "unsupported\n");
 495         else {
 496                 i = zfcp_fsf_scnprint_fc_security(
 497                         buf, PAGE_SIZE - 1, port->connection_info,
 498                         ZFCP_FSF_PRINT_FMT_SINGLEITEM);
 499                 i += sysfs_emit_at(buf, i, "\n");
 500         }
 501
 502         return i;
 503 }
 504 static ZFCP_DEV_ATTR(port, fc_security, S_IRUGO,
 505                      zfcp_sysfs_port_fc_security_show,
 506                      NULL);
 507
 508 static struct attribute *zfcp_port_attrs[] = {
 509         &dev_attr_unit_add.attr,
 510         &dev_attr_unit_remove.attr,
 511         &dev_attr_port_failed.attr,
 512         &dev_attr_port_in_recovery.attr,
 513         &dev_attr_port_status.attr,
 514         &dev_attr_port_access_denied.attr,
 515         &dev_attr_port_fc_security.attr,
 516         NULL
 517 };
 518 static struct attribute_group zfcp_port_attr_group = {
 519         .attrs = zfcp_port_attrs,
 520 };
 521 const struct attribute_group *zfcp_port_attr_groups[] = {
 522         &zfcp_port_attr_group,
 523         NULL,
 524 };
 525
 526 static struct attribute *zfcp_unit_attrs[] = {
 527         &dev_attr_unit_failed.attr,
 528         &dev_attr_unit_in_recovery.attr,
 529         &dev_attr_unit_status.attr,
 530         &dev_attr_unit_access_denied.attr,
 531         &dev_attr_unit_access_shared.attr,
 532         &dev_attr_unit_access_readonly.attr,
 533         NULL
 534 };
 535 static struct attribute_group zfcp_unit_attr_group = {
 536         .attrs = zfcp_unit_attrs,
 537 };
 538 const struct attribute_group *zfcp_unit_attr_groups[] = {
 539         &zfcp_unit_attr_group,
 540         NULL,
 541 };
 542
 543 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 544 static ssize_t                                                          \
 545 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 546                                        struct device_attribute *attr,   \
 547                                        char *buf) {                     \
 548         struct scsi_device *sdev = to_scsi_device(dev);                 \
 549         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 550         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 551         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 552         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 553                                                                         \
 554         spin_lock_bh(&lat->lock);                                       \
 555         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 556         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 557         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 558         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 559         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 560         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 561         cc  = lat->_name.counter;                                       \
 562         spin_unlock_bh(&lat->lock);                                     \
 563                                                                         \
 564         do_div(fsum, 1000);                                             \
 565         do_div(fmin, 1000);                                             \
 566         do_div(fmax, 1000);                                             \
 567         do_div(csum, 1000);                                             \
 568         do_div(cmin, 1000);                                             \
 569         do_div(cmax, 1000);                                             \
 570                                                                         \
 571         return sysfs_emit(buf, "%llu %llu %llu %llu %llu %llu %llu\n",  \
 572                           fmin, fmax, fsum, cmin, cmax, csum, cc);      \
 573 }                                                                       \
 574 static ssize_t                                                          \
 575 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 576                                         struct device_attribute *attr,  \
 577                                         const char *buf, size_t count)  \
 578 {                                                                       \
 579         struct scsi_device *sdev = to_scsi_device(dev);                 \
 580         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 581         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 582         unsigned long flags;                                            \
 583                                                                         \
 584         spin_lock_irqsave(&lat->lock, flags);                           \
 585         lat->_name.fabric.sum = 0;                                      \
 586         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 587         lat->_name.fabric.max = 0;                                      \
 588         lat->_name.channel.sum = 0;                                     \
 589         lat->_name.channel.min = 0xFFFFFFFF;                            \
 590         lat->_name.channel.max = 0;                                     \
 591         lat->_name.counter = 0;                                         \
 592         spin_unlock_irqrestore(&lat->lock, flags);                      \
 593                                                                         \
 594         return (ssize_t) count;                                         \
 595 }                                                                       \
 596 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 597                    zfcp_sysfs_unit_##_name##_latency_show,              \
 598                    zfcp_sysfs_unit_##_name##_latency_store);
 599
 600 ZFCP_DEFINE_LATENCY_ATTR(read);
 601 ZFCP_DEFINE_LATENCY_ATTR(write);
 602 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 603
 604 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 605 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 606                                               struct device_attribute *attr,\
 607                                               char *buf)                 \
 608 {                                                                        \
 609         struct scsi_device *sdev = to_scsi_device(dev);                  \
 610         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 611                                                                          \
 612         return sysfs_emit(buf, _format, _value);                         \
 613 }                                                                        \
 614 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 615
 616 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 617                       dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
 618 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 619                       (unsigned long long) zfcp_sdev->port->wwpn);
 620
 621 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 622                                             struct device_attribute *attr,
 623                                             char *buf)
 624 {
 625         struct scsi_device *sdev = to_scsi_device(dev);
 626
 627         return sysfs_emit(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 628 }
 629 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 630
 631 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
 632                       (atomic_read(&zfcp_sdev->status) &
 633                        ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 634
 635 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
 636                                            struct device_attribute *attr,
 637                                            char *buf)
 638 {
 639         struct scsi_device *sdev = to_scsi_device(dev);
 640         unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
 641         unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 642
 643         return sysfs_emit(buf, "%d\n", failed);
 644 }
 645
 646 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
 647                                             struct device_attribute *attr,
 648                                             const char *buf, size_t count)
 649 {
 650         struct scsi_device *sdev = to_scsi_device(dev);
 651         unsigned long val;
 652
 653         if (kstrtoul(buf, 0, &val) || val != 0)
 654                 return -EINVAL;
 655
 656         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 657         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 658                             "syufai3");
 659         zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
 660
 661         return count;
 662 }
 663 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
 664                    zfcp_sysfs_scsi_zfcp_failed_show,
 665                    zfcp_sysfs_scsi_zfcp_failed_store);
 666
 667 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
 668                       (atomic_read(&zfcp_sdev->status) &
 669                        ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 670
 671 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
 672                       atomic_read(&zfcp_sdev->status));
 673
 674 static struct attribute *zfcp_sdev_attrs[] = {
 675         &dev_attr_fcp_lun.attr,
 676         &dev_attr_wwpn.attr,
 677         &dev_attr_hba_id.attr,
 678         &dev_attr_read_latency.attr,
 679         &dev_attr_write_latency.attr,
 680         &dev_attr_cmd_latency.attr,
 681         &dev_attr_zfcp_access_denied.attr,
 682         &dev_attr_zfcp_failed.attr,
 683         &dev_attr_zfcp_in_recovery.attr,
 684         &dev_attr_zfcp_status.attr,
 685         NULL
 686 };
 687
 688 static const struct attribute_group zfcp_sysfs_sdev_attr_group = {
 689         .attrs = zfcp_sdev_attrs
 690 };
 691
 692 const struct attribute_group *zfcp_sysfs_sdev_attr_groups[] = {
 693         &zfcp_sysfs_sdev_attr_group,
 694         NULL
 695 };
 696
 697 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 698                                             struct device_attribute *attr,
 699                                             char *buf)
 700 {
 701         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 702         struct fsf_qtcb_bottom_port *qtcb_port;
 703         struct zfcp_adapter *adapter;
 704         int retval;
 705
 706         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 707         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 708                 return -EOPNOTSUPP;
 709
 710         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 711         if (!qtcb_port)
 712                 return -ENOMEM;
 713
 714         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 715         if (retval == 0 || retval == -EAGAIN)
 716                 retval = sysfs_emit(buf, "%u %u %u\n", qtcb_port->cp_util,
 717                                     qtcb_port->cb_util, qtcb_port->a_util);
 718         kfree(qtcb_port);
 719         return retval;
 720 }
 721 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 722
 723 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 724                                         struct fsf_statistics_info *stat_inf)
 725 {
 726         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 727         struct fsf_qtcb_bottom_config *qtcb_config;
 728         struct zfcp_adapter *adapter;
 729         int retval;
 730
 731         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 732         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 733                 return -EOPNOTSUPP;
 734
 735         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 736                               GFP_KERNEL);
 737         if (!qtcb_config)
 738                 return -ENOMEM;
 739
 740         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 741         if (retval == 0 || retval == -EAGAIN)
 742                 *stat_inf = qtcb_config->stat_info;
 743
 744         kfree(qtcb_config);
 745         return retval;
 746 }
 747
 748 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 749 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 750                                                  struct device_attribute *attr,\
 751                                                  char *buf)             \
 752 {                                                                       \
 753         struct fsf_statistics_info stat_info;                           \
 754         int retval;                                                     \
 755                                                                         \
 756         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 757         if (retval)                                                     \
 758                 return retval;                                          \
 759                                                                         \
 760         return sysfs_emit(buf, _format, ## _arg);                       \
 761 }                                                                       \
 762 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 763
 764 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 765                 (unsigned long long) stat_info.input_req,
 766                 (unsigned long long) stat_info.output_req,
 767                 (unsigned long long) stat_info.control_req);
 768
 769 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 770                 (unsigned long long) stat_info.input_mb,
 771                 (unsigned long long) stat_info.output_mb);
 772
 773 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 774                 (unsigned long long) stat_info.seconds_act);
 775
 776 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 777                                               struct device_attribute *attr,
 778                                               char *buf)
 779 {
 780         struct Scsi_Host *scsi_host = class_to_shost(dev);
 781         struct zfcp_qdio *qdio =
 782                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 783         u64 util;
 784
 785         spin_lock_bh(&qdio->stat_lock);
 786         util = qdio->req_q_util;
 787         spin_unlock_bh(&qdio->stat_lock);
 788
 789         return sysfs_emit(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 790                           (unsigned long long)util);
 791 }
 792 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 793
 794 static struct attribute *zfcp_sysfs_shost_attrs[] = {
 795         &dev_attr_utilization.attr,
 796         &dev_attr_requests.attr,
 797         &dev_attr_megabytes.attr,
 798         &dev_attr_seconds_active.attr,
 799         &dev_attr_queue_full.attr,
 800         NULL
 801 };
 802
 803 static const struct attribute_group zfcp_sysfs_shost_attr_group = {
 804         .attrs = zfcp_sysfs_shost_attrs
 805 };
 806
 807 const struct attribute_group *zfcp_sysfs_shost_attr_groups[] = {
 808         &zfcp_sysfs_shost_attr_group,
 809         NULL
 810 };
 811
 812 static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
 813         struct device *dev, struct device_attribute *attr, char *buf)
 814 {
 815         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
 816         struct zfcp_diag_header *diag_hdr;
 817         struct fc_els_flogi *nsp;
 818         ssize_t rc = -ENOLINK;
 819         unsigned long flags;
 820         unsigned int status;
 821
 822         if (!adapter)
 823                 return -ENODEV;
 824
 825         status = atomic_read(&adapter->status);
 826         if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
 827             0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
 828             0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
 829                 goto out;
 830
 831         diag_hdr = &adapter->diagnostics->config_data.header;
 832
 833         rc = zfcp_diag_update_buffer_limited(
 834                 adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
 835         if (rc != 0)
 836                 goto out;
 837
 838         spin_lock_irqsave(&diag_hdr->access_lock, flags);
 839         /* nport_serv_param doesn't contain the ELS_Command code */
 840         nsp = (struct fc_els_flogi *)((unsigned long)
 841                                               adapter->diagnostics->config_data
 842                                                       .data.nport_serv_param -
 843                                       sizeof(u32));
 844
 845         rc = sysfs_emit(buf, "%hu\n", be16_to_cpu(nsp->fl_csp.sp_bb_cred));
 846         spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
 847
 848 out:
 849         zfcp_ccw_adapter_put(adapter);
 850         return rc;
 851 }
 852 static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
 853                      zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
 854
 855 #define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtfmt)                \
 856         static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show(             \
 857                 struct device *dev, struct device_attribute *attr, char *buf)  \
 858         {                                                                      \
 859                 struct zfcp_adapter *const adapter =                           \
 860                         zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));              \
 861                 struct zfcp_diag_header *diag_hdr;                             \
 862                 ssize_t rc = -ENOLINK;                                         \
 863                 unsigned long flags;                                           \
 864                 unsigned int status;                                           \
 865                                                                                \
 866                 if (!adapter)                                                  \
 867                         return -ENODEV;                                        \
 868                                                                                \
 869                 status = atomic_read(&adapter->status);                        \
 870                 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||                 \
 871                     0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||            \
 872                     0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))             \
 873                         goto out;                                              \
 874                                                                                \
 875                 if (!zfcp_diag_support_sfp(adapter)) {                         \
 876                         rc = -EOPNOTSUPP;                                      \
 877                         goto out;                                              \
 878                 }                                                              \
 879                                                                                \
 880                 diag_hdr = &adapter->diagnostics->port_data.header;            \
 881                                                                                \
 882                 rc = zfcp_diag_update_buffer_limited(                          \
 883                         adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
 884                 if (rc != 0)                                                   \
 885                         goto out;                                              \
 886                                                                                \
 887                 spin_lock_irqsave(&diag_hdr->access_lock, flags);              \
 888                 rc = sysfs_emit(                                               \
 889                         buf, _prtfmt "\n",                                     \
 890                         adapter->diagnostics->port_data.data._qtcb_member);    \
 891                 spin_unlock_irqrestore(&diag_hdr->access_lock, flags);         \
 892                                                                                \
 893         out:                                                                   \
 894                 zfcp_ccw_adapter_put(adapter);                                 \
 895                 return rc;                                                     \
 896         }                                                                      \
 897         static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400,                    \
 898                              zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
 899
 900 ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, "%hd");
 901 ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, "%hu");
 902 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, "%hu");
 903 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, "%hu");
 904 ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, "%hu");
 905 ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, "%hu");
 906 ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, "%hu");
 907 ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, "%hu");
 908 ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, "%hu");
 909 ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, "%hu");
 910
 911 static struct attribute *zfcp_sysfs_diag_attrs[] = {
 912         &dev_attr_adapter_diag_sfp_temperature.attr,
 913         &dev_attr_adapter_diag_sfp_vcc.attr,
 914         &dev_attr_adapter_diag_sfp_tx_bias.attr,
 915         &dev_attr_adapter_diag_sfp_tx_power.attr,
 916         &dev_attr_adapter_diag_sfp_rx_power.attr,
 917         &dev_attr_adapter_diag_sfp_port_tx_type.attr,
 918         &dev_attr_adapter_diag_sfp_optical_port.attr,
 919         &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
 920         &dev_attr_adapter_diag_sfp_connector_type.attr,
 921         &dev_attr_adapter_diag_sfp_fec_active.attr,
 922         &dev_attr_adapter_diag_b2b_credit.attr,
 923         NULL,
 924 };
 925
 926 static const struct attribute_group zfcp_sysfs_diag_attr_group = {
 927         .name = "diagnostics",
 928         .attrs = zfcp_sysfs_diag_attrs,
 929 };
 930
 931 const struct attribute_group *zfcp_sysfs_adapter_attr_groups[] = {
 932         &zfcp_sysfs_adapter_attr_group,
 933         &zfcp_sysfs_diag_attr_group,
 934         NULL,
 935 };