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, 2010
   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 sprintf(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 sprintf(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 = sprintf(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 sprintf(buf, "1\n");
  99
 100         return sprintf(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 sprintf(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 = sprintf(buf, "1\n");
 180         else
 181                 i = sprintf(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
 220         if (!adapter)
 221                 return -ENODEV;
 222
 223         /*
 224          * Users wish is our command: immediately schedule and flush a
 225          * worker to conduct a synchronous port scan, that is, neither
 226          * a random delay nor a rate limit is applied here.
 227          */
 228         queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
 229         flush_delayed_work(&adapter->scan_work);
 230         zfcp_ccw_adapter_put(adapter);
 231
 232         return (ssize_t) count;
 233 }
 234 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
 235                      zfcp_sysfs_port_rescan_store);
 236
 237 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
 238
 239 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
 240 {
 241         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 242         atomic_set(&port->units, -1);
 243 }
 244
 245 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
 246 {
 247         lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
 248         return atomic_read(&port->units) == -1;
 249 }
 250
 251 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
 252 {
 253         struct zfcp_adapter *const adapter = port->adapter;
 254         unsigned long flags;
 255         struct scsi_device *sdev;
 256         bool in_use = true;
 257
 258         mutex_lock(&zfcp_sysfs_port_units_mutex);
 259         if (atomic_read(&port->units) > 0)
 260                 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
 261
 262         spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
 263         __shost_for_each_device(sdev, adapter->scsi_host) {
 264                 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
 265
 266                 if (sdev->sdev_state == SDEV_DEL ||
 267                     sdev->sdev_state == SDEV_CANCEL)
 268                         continue;
 269                 if (zsdev->port != port)
 270                         continue;
 271                 /* alive scsi_device under port of interest */
 272                 goto unlock_host_lock;
 273         }
 274
 275         /* port is about to be removed, so no more unit_add or slave_alloc */
 276         zfcp_sysfs_port_set_removing(port);
 277         in_use = false;
 278
 279 unlock_host_lock:
 280         spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
 281 unlock_port_units_mutex:
 282         mutex_unlock(&zfcp_sysfs_port_units_mutex);
 283         return in_use;
 284 }
 285
 286 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
 287                                             struct device_attribute *attr,
 288                                             const char *buf, size_t count)
 289 {
 290         struct ccw_device *cdev = to_ccwdev(dev);
 291         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 292         struct zfcp_port *port;
 293         u64 wwpn;
 294         int retval = -EINVAL;
 295
 296         if (!adapter)
 297                 return -ENODEV;
 298
 299         if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
 300                 goto out;
 301
 302         port = zfcp_get_port_by_wwpn(adapter, wwpn);
 303         if (!port)
 304                 goto out;
 305         else
 306                 retval = 0;
 307
 308         if (zfcp_sysfs_port_in_use(port)) {
 309                 retval = -EBUSY;
 310                 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
 311                 goto out;
 312         }
 313
 314         write_lock_irq(&adapter->port_list_lock);
 315         list_del(&port->list);
 316         write_unlock_irq(&adapter->port_list_lock);
 317
 318         put_device(&port->dev);
 319
 320         zfcp_erp_port_shutdown(port, 0, "syprs_1");
 321         device_unregister(&port->dev);
 322  out:
 323         zfcp_ccw_adapter_put(adapter);
 324         return retval ? retval : (ssize_t) count;
 325 }
 326 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
 327                      zfcp_sysfs_port_remove_store);
 328
 329 static ssize_t
 330 zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
 331                                      struct device_attribute *attr, char *buf)
 332 {
 333         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
 334         ssize_t rc;
 335
 336         if (!adapter)
 337                 return -ENODEV;
 338
 339         /* ceil(log(2^64 - 1) / log(10)) = 20 */
 340         rc = scnprintf(buf, 20 + 2, "%lu\n", adapter->diagnostics->max_age);
 341
 342         zfcp_ccw_adapter_put(adapter);
 343         return rc;
 344 }
 345
 346 static ssize_t
 347 zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
 348                                       struct device_attribute *attr,
 349                                       const char *buf, size_t count)
 350 {
 351         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
 352         unsigned long max_age;
 353         ssize_t rc;
 354
 355         if (!adapter)
 356                 return -ENODEV;
 357
 358         rc = kstrtoul(buf, 10, &max_age);
 359         if (rc != 0)
 360                 goto out;
 361
 362         adapter->diagnostics->max_age = max_age;
 363
 364         rc = count;
 365 out:
 366         zfcp_ccw_adapter_put(adapter);
 367         return rc;
 368 }
 369 static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
 370                      zfcp_sysfs_adapter_diag_max_age_show,
 371                      zfcp_sysfs_adapter_diag_max_age_store);
 372
 373 static struct attribute *zfcp_adapter_attrs[] = {
 374         &dev_attr_adapter_failed.attr,
 375         &dev_attr_adapter_in_recovery.attr,
 376         &dev_attr_adapter_port_remove.attr,
 377         &dev_attr_adapter_port_rescan.attr,
 378         &dev_attr_adapter_peer_wwnn.attr,
 379         &dev_attr_adapter_peer_wwpn.attr,
 380         &dev_attr_adapter_peer_d_id.attr,
 381         &dev_attr_adapter_card_version.attr,
 382         &dev_attr_adapter_lic_version.attr,
 383         &dev_attr_adapter_status.attr,
 384         &dev_attr_adapter_hardware_version.attr,
 385         &dev_attr_adapter_diag_max_age.attr,
 386         NULL
 387 };
 388
 389 struct attribute_group zfcp_sysfs_adapter_attrs = {
 390         .attrs = zfcp_adapter_attrs,
 391 };
 392
 393 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
 394                                          struct device_attribute *attr,
 395                                          const char *buf, size_t count)
 396 {
 397         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 398         u64 fcp_lun;
 399         int retval;
 400
 401         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 402                 return -EINVAL;
 403
 404         retval = zfcp_unit_add(port, fcp_lun);
 405         if (retval)
 406                 return retval;
 407
 408         return count;
 409 }
 410 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
 411
 412 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
 413                                             struct device_attribute *attr,
 414                                             const char *buf, size_t count)
 415 {
 416         struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
 417         u64 fcp_lun;
 418
 419         if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
 420                 return -EINVAL;
 421
 422         if (zfcp_unit_remove(port, fcp_lun))
 423                 return -EINVAL;
 424
 425         return count;
 426 }
 427 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
 428
 429 static struct attribute *zfcp_port_attrs[] = {
 430         &dev_attr_unit_add.attr,
 431         &dev_attr_unit_remove.attr,
 432         &dev_attr_port_failed.attr,
 433         &dev_attr_port_in_recovery.attr,
 434         &dev_attr_port_status.attr,
 435         &dev_attr_port_access_denied.attr,
 436         NULL
 437 };
 438 static struct attribute_group zfcp_port_attr_group = {
 439         .attrs = zfcp_port_attrs,
 440 };
 441 const struct attribute_group *zfcp_port_attr_groups[] = {
 442         &zfcp_port_attr_group,
 443         NULL,
 444 };
 445
 446 static struct attribute *zfcp_unit_attrs[] = {
 447         &dev_attr_unit_failed.attr,
 448         &dev_attr_unit_in_recovery.attr,
 449         &dev_attr_unit_status.attr,
 450         &dev_attr_unit_access_denied.attr,
 451         &dev_attr_unit_access_shared.attr,
 452         &dev_attr_unit_access_readonly.attr,
 453         NULL
 454 };
 455 static struct attribute_group zfcp_unit_attr_group = {
 456         .attrs = zfcp_unit_attrs,
 457 };
 458 const struct attribute_group *zfcp_unit_attr_groups[] = {
 459         &zfcp_unit_attr_group,
 460         NULL,
 461 };
 462
 463 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
 464 static ssize_t                                                          \
 465 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
 466                                        struct device_attribute *attr,   \
 467                                        char *buf) {                     \
 468         struct scsi_device *sdev = to_scsi_device(dev);                 \
 469         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 470         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 471         struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;        \
 472         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
 473                                                                         \
 474         spin_lock_bh(&lat->lock);                                       \
 475         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
 476         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
 477         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
 478         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
 479         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
 480         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
 481         cc  = lat->_name.counter;                                       \
 482         spin_unlock_bh(&lat->lock);                                     \
 483                                                                         \
 484         do_div(fsum, 1000);                                             \
 485         do_div(fmin, 1000);                                             \
 486         do_div(fmax, 1000);                                             \
 487         do_div(csum, 1000);                                             \
 488         do_div(cmin, 1000);                                             \
 489         do_div(cmax, 1000);                                             \
 490                                                                         \
 491         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
 492                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
 493 }                                                                       \
 494 static ssize_t                                                          \
 495 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
 496                                         struct device_attribute *attr,  \
 497                                         const char *buf, size_t count)  \
 498 {                                                                       \
 499         struct scsi_device *sdev = to_scsi_device(dev);                 \
 500         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);           \
 501         struct zfcp_latencies *lat = &zfcp_sdev->latencies;             \
 502         unsigned long flags;                                            \
 503                                                                         \
 504         spin_lock_irqsave(&lat->lock, flags);                           \
 505         lat->_name.fabric.sum = 0;                                      \
 506         lat->_name.fabric.min = 0xFFFFFFFF;                             \
 507         lat->_name.fabric.max = 0;                                      \
 508         lat->_name.channel.sum = 0;                                     \
 509         lat->_name.channel.min = 0xFFFFFFFF;                            \
 510         lat->_name.channel.max = 0;                                     \
 511         lat->_name.counter = 0;                                         \
 512         spin_unlock_irqrestore(&lat->lock, flags);                      \
 513                                                                         \
 514         return (ssize_t) count;                                         \
 515 }                                                                       \
 516 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
 517                    zfcp_sysfs_unit_##_name##_latency_show,              \
 518                    zfcp_sysfs_unit_##_name##_latency_store);
 519
 520 ZFCP_DEFINE_LATENCY_ATTR(read);
 521 ZFCP_DEFINE_LATENCY_ATTR(write);
 522 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 523
 524 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
 525 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
 526                                               struct device_attribute *attr,\
 527                                               char *buf)                 \
 528 {                                                                        \
 529         struct scsi_device *sdev = to_scsi_device(dev);                  \
 530         struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);            \
 531                                                                          \
 532         return sprintf(buf, _format, _value);                            \
 533 }                                                                        \
 534 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 535
 536 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
 537                       dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
 538 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
 539                       (unsigned long long) zfcp_sdev->port->wwpn);
 540
 541 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
 542                                             struct device_attribute *attr,
 543                                             char *buf)
 544 {
 545         struct scsi_device *sdev = to_scsi_device(dev);
 546
 547         return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
 548 }
 549 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
 550
 551 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
 552                       (atomic_read(&zfcp_sdev->status) &
 553                        ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
 554
 555 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
 556                                            struct device_attribute *attr,
 557                                            char *buf)
 558 {
 559         struct scsi_device *sdev = to_scsi_device(dev);
 560         unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
 561         unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
 562
 563         return sprintf(buf, "%d\n", failed);
 564 }
 565
 566 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
 567                                             struct device_attribute *attr,
 568                                             const char *buf, size_t count)
 569 {
 570         struct scsi_device *sdev = to_scsi_device(dev);
 571         unsigned long val;
 572
 573         if (kstrtoul(buf, 0, &val) || val != 0)
 574                 return -EINVAL;
 575
 576         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
 577         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
 578                             "syufai3");
 579         zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
 580
 581         return count;
 582 }
 583 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
 584                    zfcp_sysfs_scsi_zfcp_failed_show,
 585                    zfcp_sysfs_scsi_zfcp_failed_store);
 586
 587 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
 588                       (atomic_read(&zfcp_sdev->status) &
 589                        ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
 590
 591 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
 592                       atomic_read(&zfcp_sdev->status));
 593
 594 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
 595         &dev_attr_fcp_lun,
 596         &dev_attr_wwpn,
 597         &dev_attr_hba_id,
 598         &dev_attr_read_latency,
 599         &dev_attr_write_latency,
 600         &dev_attr_cmd_latency,
 601         &dev_attr_zfcp_access_denied,
 602         &dev_attr_zfcp_failed,
 603         &dev_attr_zfcp_in_recovery,
 604         &dev_attr_zfcp_status,
 605         NULL
 606 };
 607
 608 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
 609                                             struct device_attribute *attr,
 610                                             char *buf)
 611 {
 612         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 613         struct fsf_qtcb_bottom_port *qtcb_port;
 614         struct zfcp_adapter *adapter;
 615         int retval;
 616
 617         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 618         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 619                 return -EOPNOTSUPP;
 620
 621         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
 622         if (!qtcb_port)
 623                 return -ENOMEM;
 624
 625         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 626         if (retval == 0 || retval == -EAGAIN)
 627                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 628                                  qtcb_port->cb_util, qtcb_port->a_util);
 629         kfree(qtcb_port);
 630         return retval;
 631 }
 632 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
 633
 634 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 635                                         struct fsf_statistics_info *stat_inf)
 636 {
 637         struct Scsi_Host *scsi_host = dev_to_shost(dev);
 638         struct fsf_qtcb_bottom_config *qtcb_config;
 639         struct zfcp_adapter *adapter;
 640         int retval;
 641
 642         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 643         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 644                 return -EOPNOTSUPP;
 645
 646         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
 647                               GFP_KERNEL);
 648         if (!qtcb_config)
 649                 return -ENOMEM;
 650
 651         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 652         if (retval == 0 || retval == -EAGAIN)
 653                 *stat_inf = qtcb_config->stat_info;
 654
 655         kfree(qtcb_config);
 656         return retval;
 657 }
 658
 659 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
 660 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
 661                                                  struct device_attribute *attr,\
 662                                                  char *buf)             \
 663 {                                                                       \
 664         struct fsf_statistics_info stat_info;                           \
 665         int retval;                                                     \
 666                                                                         \
 667         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
 668         if (retval)                                                     \
 669                 return retval;                                          \
 670                                                                         \
 671         return sprintf(buf, _format, ## _arg);                          \
 672 }                                                                       \
 673 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
 674
 675 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
 676                 (unsigned long long) stat_info.input_req,
 677                 (unsigned long long) stat_info.output_req,
 678                 (unsigned long long) stat_info.control_req);
 679
 680 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
 681                 (unsigned long long) stat_info.input_mb,
 682                 (unsigned long long) stat_info.output_mb);
 683
 684 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
 685                 (unsigned long long) stat_info.seconds_act);
 686
 687 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
 688                                               struct device_attribute *attr,
 689                                               char *buf)
 690 {
 691         struct Scsi_Host *scsi_host = class_to_shost(dev);
 692         struct zfcp_qdio *qdio =
 693                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 694         u64 util;
 695
 696         spin_lock_bh(&qdio->stat_lock);
 697         util = qdio->req_q_util;
 698         spin_unlock_bh(&qdio->stat_lock);
 699
 700         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 701                        (unsigned long long)util);
 702 }
 703 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
 704
 705 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
 706         &dev_attr_utilization,
 707         &dev_attr_requests,
 708         &dev_attr_megabytes,
 709         &dev_attr_seconds_active,
 710         &dev_attr_queue_full,
 711         NULL
 712 };
 713
 714 static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
 715         struct device *dev, struct device_attribute *attr, char *buf)
 716 {
 717         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
 718         struct zfcp_diag_header *diag_hdr;
 719         struct fc_els_flogi *nsp;
 720         ssize_t rc = -ENOLINK;
 721         unsigned long flags;
 722         unsigned int status;
 723
 724         if (!adapter)
 725                 return -ENODEV;
 726
 727         status = atomic_read(&adapter->status);
 728         if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
 729             0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
 730             0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
 731                 goto out;
 732
 733         diag_hdr = &adapter->diagnostics->config_data.header;
 734
 735         rc = zfcp_diag_update_buffer_limited(
 736                 adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
 737         if (rc != 0)
 738                 goto out;
 739
 740         spin_lock_irqsave(&diag_hdr->access_lock, flags);
 741         /* nport_serv_param doesn't contain the ELS_Command code */
 742         nsp = (struct fc_els_flogi *)((unsigned long)
 743                                               adapter->diagnostics->config_data
 744                                                       .data.nport_serv_param -
 745                                       sizeof(u32));
 746
 747         rc = scnprintf(buf, 5 + 2, "%hu\n",
 748                        be16_to_cpu(nsp->fl_csp.sp_bb_cred));
 749         spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
 750
 751 out:
 752         zfcp_ccw_adapter_put(adapter);
 753         return rc;
 754 }
 755 static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
 756                      zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
 757
 758 #define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtsize, _prtfmt)      \
 759         static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show(             \
 760                 struct device *dev, struct device_attribute *attr, char *buf)  \
 761         {                                                                      \
 762                 struct zfcp_adapter *const adapter =                           \
 763                         zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));              \
 764                 struct zfcp_diag_header *diag_hdr;                             \
 765                 ssize_t rc = -ENOLINK;                                         \
 766                 unsigned long flags;                                           \
 767                 unsigned int status;                                           \
 768                                                                                \
 769                 if (!adapter)                                                  \
 770                         return -ENODEV;                                        \
 771                                                                                \
 772                 status = atomic_read(&adapter->status);                        \
 773                 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||                 \
 774                     0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||            \
 775                     0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))             \
 776                         goto out;                                              \
 777                                                                                \
 778                 if (!zfcp_diag_support_sfp(adapter)) {                         \
 779                         rc = -EOPNOTSUPP;                                      \
 780                         goto out;                                              \
 781                 }                                                              \
 782                                                                                \
 783                 diag_hdr = &adapter->diagnostics->port_data.header;            \
 784                                                                                \
 785                 rc = zfcp_diag_update_buffer_limited(                          \
 786                         adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
 787                 if (rc != 0)                                                   \
 788                         goto out;                                              \
 789                                                                                \
 790                 spin_lock_irqsave(&diag_hdr->access_lock, flags);              \
 791                 rc = scnprintf(                                                \
 792                         buf, (_prtsize) + 2, _prtfmt "\n",                     \
 793                         adapter->diagnostics->port_data.data._qtcb_member);    \
 794                 spin_unlock_irqrestore(&diag_hdr->access_lock, flags);         \
 795                                                                                \
 796         out:                                                                   \
 797                 zfcp_ccw_adapter_put(adapter);                                 \
 798                 return rc;                                                     \
 799         }                                                                      \
 800         static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400,                    \
 801                              zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
 802
 803 ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, 5, "%hu");
 804 ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, 5, "%hu");
 805 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, 5, "%hu");
 806 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, 5, "%hu");
 807 ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, 5, "%hu");
 808 ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, 2, "%hu");
 809 ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, 1, "%hu");
 810 ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, 1, "%hu");
 811 ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, 1, "%hu");
 812 ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, 1, "%hu");
 813
 814 static struct attribute *zfcp_sysfs_diag_attrs[] = {
 815         &dev_attr_adapter_diag_sfp_temperature.attr,
 816         &dev_attr_adapter_diag_sfp_vcc.attr,
 817         &dev_attr_adapter_diag_sfp_tx_bias.attr,
 818         &dev_attr_adapter_diag_sfp_tx_power.attr,
 819         &dev_attr_adapter_diag_sfp_rx_power.attr,
 820         &dev_attr_adapter_diag_sfp_port_tx_type.attr,
 821         &dev_attr_adapter_diag_sfp_optical_port.attr,
 822         &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
 823         &dev_attr_adapter_diag_sfp_connector_type.attr,
 824         &dev_attr_adapter_diag_sfp_fec_active.attr,
 825         &dev_attr_adapter_diag_b2b_credit.attr,
 826         NULL,
 827 };
 828
 829 const struct attribute_group zfcp_sysfs_diag_attr_group = {
 830         .name = "diagnostics",
 831         .attrs = zfcp_sysfs_diag_attrs,
 832 };