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0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * zfcp device driver
0004  *
0005  * sysfs attributes.
0006  *
0007  * Copyright IBM Corp. 2008, 2020
0008  */
0009 
0010 #define KMSG_COMPONENT "zfcp"
0011 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
0012 
0013 #include <linux/slab.h>
0014 #include "zfcp_diag.h"
0015 #include "zfcp_ext.h"
0016 
0017 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
0018 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
0019                                 _show, _store)
0020 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)         \
0021 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
0022                            struct device_attribute *at,\
0023                            char *buf)              \
0024 {                                          \
0025     struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
0026                                            \
0027     return sprintf(buf, _format, _value);                      \
0028 }                                          \
0029 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                    \
0030              zfcp_sysfs_##_feat##_##_name##_show, NULL);
0031 
0032 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value)              \
0033 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
0034                            struct device_attribute *at,\
0035                            char *buf)              \
0036 {                                          \
0037     return sprintf(buf, _format, _value);                      \
0038 }                                          \
0039 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                    \
0040              zfcp_sysfs_##_feat##_##_name##_show, NULL);
0041 
0042 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)               \
0043 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
0044                          struct device_attribute *at,\
0045                          char *buf)          \
0046 {                                        \
0047     struct ccw_device *cdev = to_ccwdev(dev);                \
0048     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
0049     int i;                                   \
0050                                          \
0051     if (!adapter)                                \
0052         return -ENODEV;                          \
0053                                          \
0054     i = sprintf(buf, _format, _value);                   \
0055     zfcp_ccw_adapter_put(adapter);                       \
0056     return i;                                \
0057 }                                        \
0058 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                    \
0059              zfcp_sysfs_adapter_##_name##_show, NULL);
0060 
0061 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
0062 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
0063            (unsigned long long) adapter->peer_wwnn);
0064 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
0065            (unsigned long long) adapter->peer_wwpn);
0066 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
0067 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
0068 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
0069 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
0070 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
0071                      ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
0072 
0073 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
0074          atomic_read(&port->status));
0075 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
0076          (atomic_read(&port->status) &
0077           ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
0078 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
0079 
0080 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
0081          zfcp_unit_sdev_status(unit));
0082 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
0083          (zfcp_unit_sdev_status(unit) &
0084           ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
0085 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
0086          (zfcp_unit_sdev_status(unit) &
0087           ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
0088 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
0089 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
0090 
0091 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
0092                        struct device_attribute *attr,
0093                        char *buf)
0094 {
0095     struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
0096 
0097     if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
0098         return sprintf(buf, "1\n");
0099 
0100     return sprintf(buf, "0\n");
0101 }
0102 
0103 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
0104                         struct device_attribute *attr,
0105                         const char *buf, size_t count)
0106 {
0107     struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
0108     unsigned long val;
0109 
0110     if (kstrtoul(buf, 0, &val) || val != 0)
0111         return -EINVAL;
0112 
0113     zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
0114     zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
0115     zfcp_erp_wait(port->adapter);
0116 
0117     return count;
0118 }
0119 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
0120              zfcp_sysfs_port_failed_show,
0121              zfcp_sysfs_port_failed_store);
0122 
0123 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
0124                        struct device_attribute *attr,
0125                        char *buf)
0126 {
0127     struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
0128     struct scsi_device *sdev;
0129     unsigned int status, failed = 1;
0130 
0131     sdev = zfcp_unit_sdev(unit);
0132     if (sdev) {
0133         status = atomic_read(&sdev_to_zfcp(sdev)->status);
0134         failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
0135         scsi_device_put(sdev);
0136     }
0137 
0138     return sprintf(buf, "%d\n", failed);
0139 }
0140 
0141 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
0142                         struct device_attribute *attr,
0143                         const char *buf, size_t count)
0144 {
0145     struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
0146     unsigned long val;
0147     struct scsi_device *sdev;
0148 
0149     if (kstrtoul(buf, 0, &val) || val != 0)
0150         return -EINVAL;
0151 
0152     sdev = zfcp_unit_sdev(unit);
0153     if (sdev) {
0154         zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
0155         zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
0156                     "syufai2");
0157         zfcp_erp_wait(unit->port->adapter);
0158     } else
0159         zfcp_unit_scsi_scan(unit);
0160 
0161     return count;
0162 }
0163 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
0164              zfcp_sysfs_unit_failed_show,
0165              zfcp_sysfs_unit_failed_store);
0166 
0167 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
0168                           struct device_attribute *attr,
0169                           char *buf)
0170 {
0171     struct ccw_device *cdev = to_ccwdev(dev);
0172     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
0173     int i;
0174 
0175     if (!adapter)
0176         return -ENODEV;
0177 
0178     if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
0179         i = sprintf(buf, "1\n");
0180     else
0181         i = sprintf(buf, "0\n");
0182 
0183     zfcp_ccw_adapter_put(adapter);
0184     return i;
0185 }
0186 
0187 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
0188                            struct device_attribute *attr,
0189                            const char *buf, size_t count)
0190 {
0191     struct ccw_device *cdev = to_ccwdev(dev);
0192     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
0193     unsigned long val;
0194     int retval = 0;
0195 
0196     if (!adapter)
0197         return -ENODEV;
0198 
0199     if (kstrtoul(buf, 0, &val) || val != 0) {
0200         retval = -EINVAL;
0201         goto out;
0202     }
0203 
0204     zfcp_erp_adapter_reset_sync(adapter, "syafai2");
0205 out:
0206     zfcp_ccw_adapter_put(adapter);
0207     return retval ? retval : (ssize_t) count;
0208 }
0209 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
0210              zfcp_sysfs_adapter_failed_show,
0211              zfcp_sysfs_adapter_failed_store);
0212 
0213 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
0214                         struct device_attribute *attr,
0215                         const char *buf, size_t count)
0216 {
0217     struct ccw_device *cdev = to_ccwdev(dev);
0218     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
0219     int retval = 0;
0220 
0221     if (!adapter)
0222         return -ENODEV;
0223 
0224     /*
0225      * If `scsi_host` is missing, we can't schedule `scan_work`, as it
0226      * makes use of the corresponding fc_host object. But this state is
0227      * only possible if xconfig/xport data has never completed yet,
0228      * and we couldn't successfully scan for ports anyway.
0229      */
0230     if (adapter->scsi_host == NULL) {
0231         retval = -ENODEV;
0232         goto out;
0233     }
0234 
0235     /*
0236      * Users wish is our command: immediately schedule and flush a
0237      * worker to conduct a synchronous port scan, that is, neither
0238      * a random delay nor a rate limit is applied here.
0239      */
0240     queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
0241     flush_delayed_work(&adapter->scan_work);
0242 out:
0243     zfcp_ccw_adapter_put(adapter);
0244     return retval ? retval : (ssize_t) count;
0245 }
0246 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
0247              zfcp_sysfs_port_rescan_store);
0248 
0249 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
0250 
0251 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
0252 {
0253     lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
0254     atomic_set(&port->units, -1);
0255 }
0256 
0257 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
0258 {
0259     lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
0260     return atomic_read(&port->units) == -1;
0261 }
0262 
0263 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
0264 {
0265     struct zfcp_adapter *const adapter = port->adapter;
0266     unsigned long flags;
0267     struct scsi_device *sdev;
0268     bool in_use = true;
0269 
0270     mutex_lock(&zfcp_sysfs_port_units_mutex);
0271     if (atomic_read(&port->units) > 0)
0272         goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
0273 
0274     spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
0275     __shost_for_each_device(sdev, adapter->scsi_host) {
0276         const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
0277 
0278         if (sdev->sdev_state == SDEV_DEL ||
0279             sdev->sdev_state == SDEV_CANCEL)
0280             continue;
0281         if (zsdev->port != port)
0282             continue;
0283         /* alive scsi_device under port of interest */
0284         goto unlock_host_lock;
0285     }
0286 
0287     /* port is about to be removed, so no more unit_add or slave_alloc */
0288     zfcp_sysfs_port_set_removing(port);
0289     in_use = false;
0290 
0291 unlock_host_lock:
0292     spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
0293 unlock_port_units_mutex:
0294     mutex_unlock(&zfcp_sysfs_port_units_mutex);
0295     return in_use;
0296 }
0297 
0298 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
0299                         struct device_attribute *attr,
0300                         const char *buf, size_t count)
0301 {
0302     struct ccw_device *cdev = to_ccwdev(dev);
0303     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
0304     struct zfcp_port *port;
0305     u64 wwpn;
0306     int retval = -EINVAL;
0307 
0308     if (!adapter)
0309         return -ENODEV;
0310 
0311     if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
0312         goto out;
0313 
0314     port = zfcp_get_port_by_wwpn(adapter, wwpn);
0315     if (!port)
0316         goto out;
0317     else
0318         retval = 0;
0319 
0320     if (zfcp_sysfs_port_in_use(port)) {
0321         retval = -EBUSY;
0322         put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
0323         goto out;
0324     }
0325 
0326     write_lock_irq(&adapter->port_list_lock);
0327     list_del(&port->list);
0328     write_unlock_irq(&adapter->port_list_lock);
0329 
0330     zfcp_erp_port_shutdown(port, 0, "syprs_1");
0331     device_unregister(&port->dev);
0332 
0333     put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
0334  out:
0335     zfcp_ccw_adapter_put(adapter);
0336     return retval ? retval : (ssize_t) count;
0337 }
0338 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
0339              zfcp_sysfs_port_remove_store);
0340 
0341 static ssize_t
0342 zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
0343                      struct device_attribute *attr, char *buf)
0344 {
0345     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
0346     ssize_t rc;
0347 
0348     if (!adapter)
0349         return -ENODEV;
0350 
0351     /* ceil(log(2^64 - 1) / log(10)) = 20 */
0352     rc = scnprintf(buf, 20 + 2, "%lu\n", adapter->diagnostics->max_age);
0353 
0354     zfcp_ccw_adapter_put(adapter);
0355     return rc;
0356 }
0357 
0358 static ssize_t
0359 zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
0360                       struct device_attribute *attr,
0361                       const char *buf, size_t count)
0362 {
0363     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
0364     unsigned long max_age;
0365     ssize_t rc;
0366 
0367     if (!adapter)
0368         return -ENODEV;
0369 
0370     rc = kstrtoul(buf, 10, &max_age);
0371     if (rc != 0)
0372         goto out;
0373 
0374     adapter->diagnostics->max_age = max_age;
0375 
0376     rc = count;
0377 out:
0378     zfcp_ccw_adapter_put(adapter);
0379     return rc;
0380 }
0381 static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
0382              zfcp_sysfs_adapter_diag_max_age_show,
0383              zfcp_sysfs_adapter_diag_max_age_store);
0384 
0385 static ssize_t zfcp_sysfs_adapter_fc_security_show(
0386     struct device *dev, struct device_attribute *attr, char *buf)
0387 {
0388     struct ccw_device *cdev = to_ccwdev(dev);
0389     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
0390     unsigned int status;
0391     int i;
0392 
0393     if (!adapter)
0394         return -ENODEV;
0395 
0396     /*
0397      * Adapter status COMMON_OPEN implies xconf data and xport data
0398      * was done. Adapter FC Endpoint Security capability remains
0399      * unchanged in case of COMMON_ERP_FAILED (e.g. due to local link
0400      * down).
0401      */
0402     status = atomic_read(&adapter->status);
0403     if (0 == (status & ZFCP_STATUS_COMMON_OPEN))
0404         i = sprintf(buf, "unknown\n");
0405     else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
0406         i = sprintf(buf, "unsupported\n");
0407     else {
0408         i = zfcp_fsf_scnprint_fc_security(
0409             buf, PAGE_SIZE - 1, adapter->fc_security_algorithms,
0410             ZFCP_FSF_PRINT_FMT_LIST);
0411         i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
0412     }
0413 
0414     zfcp_ccw_adapter_put(adapter);
0415     return i;
0416 }
0417 static ZFCP_DEV_ATTR(adapter, fc_security, S_IRUGO,
0418              zfcp_sysfs_adapter_fc_security_show,
0419              NULL);
0420 
0421 static struct attribute *zfcp_adapter_attrs[] = {
0422     &dev_attr_adapter_failed.attr,
0423     &dev_attr_adapter_in_recovery.attr,
0424     &dev_attr_adapter_port_remove.attr,
0425     &dev_attr_adapter_port_rescan.attr,
0426     &dev_attr_adapter_peer_wwnn.attr,
0427     &dev_attr_adapter_peer_wwpn.attr,
0428     &dev_attr_adapter_peer_d_id.attr,
0429     &dev_attr_adapter_card_version.attr,
0430     &dev_attr_adapter_lic_version.attr,
0431     &dev_attr_adapter_status.attr,
0432     &dev_attr_adapter_hardware_version.attr,
0433     &dev_attr_adapter_diag_max_age.attr,
0434     &dev_attr_adapter_fc_security.attr,
0435     NULL
0436 };
0437 
0438 static const struct attribute_group zfcp_sysfs_adapter_attr_group = {
0439     .attrs = zfcp_adapter_attrs,
0440 };
0441 
0442 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
0443                      struct device_attribute *attr,
0444                      const char *buf, size_t count)
0445 {
0446     struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
0447     u64 fcp_lun;
0448     int retval;
0449 
0450     if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
0451         return -EINVAL;
0452 
0453     retval = zfcp_unit_add(port, fcp_lun);
0454     if (retval)
0455         return retval;
0456 
0457     return count;
0458 }
0459 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
0460 
0461 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
0462                         struct device_attribute *attr,
0463                         const char *buf, size_t count)
0464 {
0465     struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
0466     u64 fcp_lun;
0467 
0468     if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
0469         return -EINVAL;
0470 
0471     if (zfcp_unit_remove(port, fcp_lun))
0472         return -EINVAL;
0473 
0474     return count;
0475 }
0476 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
0477 
0478 static ssize_t zfcp_sysfs_port_fc_security_show(struct device *dev,
0479                         struct device_attribute *attr,
0480                         char *buf)
0481 {
0482     struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
0483     struct zfcp_adapter *adapter = port->adapter;
0484     unsigned int status = atomic_read(&port->status);
0485     int i;
0486 
0487     if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
0488         0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
0489         0 == (status & ZFCP_STATUS_PORT_PHYS_OPEN) ||
0490         0 != (status & ZFCP_STATUS_PORT_LINK_TEST) ||
0491         0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
0492         0 != (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
0493         i = sprintf(buf, "unknown\n");
0494     else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
0495         i = sprintf(buf, "unsupported\n");
0496     else {
0497         i = zfcp_fsf_scnprint_fc_security(
0498             buf, PAGE_SIZE - 1, port->connection_info,
0499             ZFCP_FSF_PRINT_FMT_SINGLEITEM);
0500         i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
0501     }
0502 
0503     return i;
0504 }
0505 static ZFCP_DEV_ATTR(port, fc_security, S_IRUGO,
0506              zfcp_sysfs_port_fc_security_show,
0507              NULL);
0508 
0509 static struct attribute *zfcp_port_attrs[] = {
0510     &dev_attr_unit_add.attr,
0511     &dev_attr_unit_remove.attr,
0512     &dev_attr_port_failed.attr,
0513     &dev_attr_port_in_recovery.attr,
0514     &dev_attr_port_status.attr,
0515     &dev_attr_port_access_denied.attr,
0516     &dev_attr_port_fc_security.attr,
0517     NULL
0518 };
0519 static struct attribute_group zfcp_port_attr_group = {
0520     .attrs = zfcp_port_attrs,
0521 };
0522 const struct attribute_group *zfcp_port_attr_groups[] = {
0523     &zfcp_port_attr_group,
0524     NULL,
0525 };
0526 
0527 static struct attribute *zfcp_unit_attrs[] = {
0528     &dev_attr_unit_failed.attr,
0529     &dev_attr_unit_in_recovery.attr,
0530     &dev_attr_unit_status.attr,
0531     &dev_attr_unit_access_denied.attr,
0532     &dev_attr_unit_access_shared.attr,
0533     &dev_attr_unit_access_readonly.attr,
0534     NULL
0535 };
0536 static struct attribute_group zfcp_unit_attr_group = {
0537     .attrs = zfcp_unit_attrs,
0538 };
0539 const struct attribute_group *zfcp_unit_attr_groups[] = {
0540     &zfcp_unit_attr_group,
0541     NULL,
0542 };
0543 
0544 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                 \
0545 static ssize_t                              \
0546 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,      \
0547                        struct device_attribute *attr,   \
0548                        char *buf) {         \
0549     struct scsi_device *sdev = to_scsi_device(dev);         \
0550     struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);       \
0551     struct zfcp_latencies *lat = &zfcp_sdev->latencies;     \
0552     struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;    \
0553     unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;  \
0554                                     \
0555     spin_lock_bh(&lat->lock);                   \
0556     fsum = lat->_name.fabric.sum * adapter->timer_ticks;        \
0557     fmin = lat->_name.fabric.min * adapter->timer_ticks;        \
0558     fmax = lat->_name.fabric.max * adapter->timer_ticks;        \
0559     csum = lat->_name.channel.sum * adapter->timer_ticks;       \
0560     cmin = lat->_name.channel.min * adapter->timer_ticks;       \
0561     cmax = lat->_name.channel.max * adapter->timer_ticks;       \
0562     cc  = lat->_name.counter;                   \
0563     spin_unlock_bh(&lat->lock);                 \
0564                                     \
0565     do_div(fsum, 1000);                     \
0566     do_div(fmin, 1000);                     \
0567     do_div(fmax, 1000);                     \
0568     do_div(csum, 1000);                     \
0569     do_div(cmin, 1000);                     \
0570     do_div(cmax, 1000);                     \
0571                                     \
0572     return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
0573                fmin, fmax, fsum, cmin, cmax, csum, cc);     \
0574 }                                   \
0575 static ssize_t                              \
0576 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,     \
0577                     struct device_attribute *attr,  \
0578                     const char *buf, size_t count)  \
0579 {                                   \
0580     struct scsi_device *sdev = to_scsi_device(dev);         \
0581     struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);       \
0582     struct zfcp_latencies *lat = &zfcp_sdev->latencies;     \
0583     unsigned long flags;                        \
0584                                     \
0585     spin_lock_irqsave(&lat->lock, flags);               \
0586     lat->_name.fabric.sum = 0;                  \
0587     lat->_name.fabric.min = 0xFFFFFFFF;             \
0588     lat->_name.fabric.max = 0;                  \
0589     lat->_name.channel.sum = 0;                 \
0590     lat->_name.channel.min = 0xFFFFFFFF;                \
0591     lat->_name.channel.max = 0;                 \
0592     lat->_name.counter = 0;                     \
0593     spin_unlock_irqrestore(&lat->lock, flags);          \
0594                                     \
0595     return (ssize_t) count;                     \
0596 }                                   \
0597 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,          \
0598            zfcp_sysfs_unit_##_name##_latency_show,      \
0599            zfcp_sysfs_unit_##_name##_latency_store);
0600 
0601 ZFCP_DEFINE_LATENCY_ATTR(read);
0602 ZFCP_DEFINE_LATENCY_ATTR(write);
0603 ZFCP_DEFINE_LATENCY_ATTR(cmd);
0604 
0605 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)           \
0606 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,   \
0607                           struct device_attribute *attr,\
0608                           char *buf)                 \
0609 {                                                                        \
0610     struct scsi_device *sdev = to_scsi_device(dev);          \
0611     struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);        \
0612                                      \
0613     return sprintf(buf, _format, _value);                            \
0614 }                                                                        \
0615 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
0616 
0617 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
0618               dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
0619 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
0620               (unsigned long long) zfcp_sdev->port->wwpn);
0621 
0622 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
0623                         struct device_attribute *attr,
0624                         char *buf)
0625 {
0626     struct scsi_device *sdev = to_scsi_device(dev);
0627 
0628     return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
0629 }
0630 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
0631 
0632 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
0633               (atomic_read(&zfcp_sdev->status) &
0634                ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
0635 
0636 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
0637                        struct device_attribute *attr,
0638                        char *buf)
0639 {
0640     struct scsi_device *sdev = to_scsi_device(dev);
0641     unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
0642     unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
0643 
0644     return sprintf(buf, "%d\n", failed);
0645 }
0646 
0647 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
0648                         struct device_attribute *attr,
0649                         const char *buf, size_t count)
0650 {
0651     struct scsi_device *sdev = to_scsi_device(dev);
0652     unsigned long val;
0653 
0654     if (kstrtoul(buf, 0, &val) || val != 0)
0655         return -EINVAL;
0656 
0657     zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
0658     zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
0659                 "syufai3");
0660     zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
0661 
0662     return count;
0663 }
0664 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
0665            zfcp_sysfs_scsi_zfcp_failed_show,
0666            zfcp_sysfs_scsi_zfcp_failed_store);
0667 
0668 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
0669               (atomic_read(&zfcp_sdev->status) &
0670                ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
0671 
0672 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
0673               atomic_read(&zfcp_sdev->status));
0674 
0675 static struct attribute *zfcp_sdev_attrs[] = {
0676     &dev_attr_fcp_lun.attr,
0677     &dev_attr_wwpn.attr,
0678     &dev_attr_hba_id.attr,
0679     &dev_attr_read_latency.attr,
0680     &dev_attr_write_latency.attr,
0681     &dev_attr_cmd_latency.attr,
0682     &dev_attr_zfcp_access_denied.attr,
0683     &dev_attr_zfcp_failed.attr,
0684     &dev_attr_zfcp_in_recovery.attr,
0685     &dev_attr_zfcp_status.attr,
0686     NULL
0687 };
0688 
0689 static const struct attribute_group zfcp_sysfs_sdev_attr_group = {
0690     .attrs = zfcp_sdev_attrs
0691 };
0692 
0693 const struct attribute_group *zfcp_sysfs_sdev_attr_groups[] = {
0694     &zfcp_sysfs_sdev_attr_group,
0695     NULL
0696 };
0697 
0698 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
0699                         struct device_attribute *attr,
0700                         char *buf)
0701 {
0702     struct Scsi_Host *scsi_host = dev_to_shost(dev);
0703     struct fsf_qtcb_bottom_port *qtcb_port;
0704     struct zfcp_adapter *adapter;
0705     int retval;
0706 
0707     adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
0708     if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
0709         return -EOPNOTSUPP;
0710 
0711     qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
0712     if (!qtcb_port)
0713         return -ENOMEM;
0714 
0715     retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
0716     if (retval == 0 || retval == -EAGAIN)
0717         retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
0718                  qtcb_port->cb_util, qtcb_port->a_util);
0719     kfree(qtcb_port);
0720     return retval;
0721 }
0722 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
0723 
0724 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
0725                     struct fsf_statistics_info *stat_inf)
0726 {
0727     struct Scsi_Host *scsi_host = dev_to_shost(dev);
0728     struct fsf_qtcb_bottom_config *qtcb_config;
0729     struct zfcp_adapter *adapter;
0730     int retval;
0731 
0732     adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
0733     if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
0734         return -EOPNOTSUPP;
0735 
0736     qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
0737                   GFP_KERNEL);
0738     if (!qtcb_config)
0739         return -ENOMEM;
0740 
0741     retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
0742     if (retval == 0 || retval == -EAGAIN)
0743         *stat_inf = qtcb_config->stat_info;
0744 
0745     kfree(qtcb_config);
0746     return retval;
0747 }
0748 
0749 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)            \
0750 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
0751                          struct device_attribute *attr,\
0752                          char *buf)     \
0753 {                                   \
0754     struct fsf_statistics_info stat_info;               \
0755     int retval;                         \
0756                                     \
0757     retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);     \
0758     if (retval)                         \
0759         return retval;                      \
0760                                     \
0761     return sprintf(buf, _format, ## _arg);              \
0762 }                                   \
0763 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
0764 
0765 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
0766         (unsigned long long) stat_info.input_req,
0767         (unsigned long long) stat_info.output_req,
0768         (unsigned long long) stat_info.control_req);
0769 
0770 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
0771         (unsigned long long) stat_info.input_mb,
0772         (unsigned long long) stat_info.output_mb);
0773 
0774 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
0775         (unsigned long long) stat_info.seconds_act);
0776 
0777 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
0778                           struct device_attribute *attr,
0779                           char *buf)
0780 {
0781     struct Scsi_Host *scsi_host = class_to_shost(dev);
0782     struct zfcp_qdio *qdio =
0783         ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
0784     u64 util;
0785 
0786     spin_lock_bh(&qdio->stat_lock);
0787     util = qdio->req_q_util;
0788     spin_unlock_bh(&qdio->stat_lock);
0789 
0790     return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
0791                (unsigned long long)util);
0792 }
0793 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
0794 
0795 static struct attribute *zfcp_sysfs_shost_attrs[] = {
0796     &dev_attr_utilization.attr,
0797     &dev_attr_requests.attr,
0798     &dev_attr_megabytes.attr,
0799     &dev_attr_seconds_active.attr,
0800     &dev_attr_queue_full.attr,
0801     NULL
0802 };
0803 
0804 static const struct attribute_group zfcp_sysfs_shost_attr_group = {
0805     .attrs = zfcp_sysfs_shost_attrs
0806 };
0807 
0808 const struct attribute_group *zfcp_sysfs_shost_attr_groups[] = {
0809     &zfcp_sysfs_shost_attr_group,
0810     NULL
0811 };
0812 
0813 static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
0814     struct device *dev, struct device_attribute *attr, char *buf)
0815 {
0816     struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
0817     struct zfcp_diag_header *diag_hdr;
0818     struct fc_els_flogi *nsp;
0819     ssize_t rc = -ENOLINK;
0820     unsigned long flags;
0821     unsigned int status;
0822 
0823     if (!adapter)
0824         return -ENODEV;
0825 
0826     status = atomic_read(&adapter->status);
0827     if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
0828         0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
0829         0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
0830         goto out;
0831 
0832     diag_hdr = &adapter->diagnostics->config_data.header;
0833 
0834     rc = zfcp_diag_update_buffer_limited(
0835         adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
0836     if (rc != 0)
0837         goto out;
0838 
0839     spin_lock_irqsave(&diag_hdr->access_lock, flags);
0840     /* nport_serv_param doesn't contain the ELS_Command code */
0841     nsp = (struct fc_els_flogi *)((unsigned long)
0842                           adapter->diagnostics->config_data
0843                               .data.nport_serv_param -
0844                       sizeof(u32));
0845 
0846     rc = scnprintf(buf, 5 + 2, "%hu\n",
0847                be16_to_cpu(nsp->fl_csp.sp_bb_cred));
0848     spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
0849 
0850 out:
0851     zfcp_ccw_adapter_put(adapter);
0852     return rc;
0853 }
0854 static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
0855              zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
0856 
0857 #define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtsize, _prtfmt)      \
0858     static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show(         \
0859         struct device *dev, struct device_attribute *attr, char *buf)  \
0860     {                                      \
0861         struct zfcp_adapter *const adapter =                   \
0862             zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));          \
0863         struct zfcp_diag_header *diag_hdr;                 \
0864         ssize_t rc = -ENOLINK;                         \
0865         unsigned long flags;                           \
0866         unsigned int status;                           \
0867                                            \
0868         if (!adapter)                              \
0869             return -ENODEV;                        \
0870                                            \
0871         status = atomic_read(&adapter->status);                \
0872         if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||             \
0873             0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||        \
0874             0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))         \
0875             goto out;                          \
0876                                            \
0877         if (!zfcp_diag_support_sfp(adapter)) {                 \
0878             rc = -EOPNOTSUPP;                      \
0879             goto out;                          \
0880         }                                  \
0881                                            \
0882         diag_hdr = &adapter->diagnostics->port_data.header;        \
0883                                            \
0884         rc = zfcp_diag_update_buffer_limited(                  \
0885             adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
0886         if (rc != 0)                               \
0887             goto out;                          \
0888                                            \
0889         spin_lock_irqsave(&diag_hdr->access_lock, flags);          \
0890         rc = scnprintf(                            \
0891             buf, (_prtsize) + 2, _prtfmt "\n",             \
0892             adapter->diagnostics->port_data.data._qtcb_member);    \
0893         spin_unlock_irqrestore(&diag_hdr->access_lock, flags);         \
0894                                            \
0895     out:                                       \
0896         zfcp_ccw_adapter_put(adapter);                     \
0897         return rc;                             \
0898     }                                      \
0899     static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400,            \
0900                  zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
0901 
0902 ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, 6, "%hd");
0903 ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, 5, "%hu");
0904 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, 5, "%hu");
0905 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, 5, "%hu");
0906 ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, 5, "%hu");
0907 ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, 2, "%hu");
0908 ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, 1, "%hu");
0909 ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, 1, "%hu");
0910 ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, 1, "%hu");
0911 ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, 1, "%hu");
0912 
0913 static struct attribute *zfcp_sysfs_diag_attrs[] = {
0914     &dev_attr_adapter_diag_sfp_temperature.attr,
0915     &dev_attr_adapter_diag_sfp_vcc.attr,
0916     &dev_attr_adapter_diag_sfp_tx_bias.attr,
0917     &dev_attr_adapter_diag_sfp_tx_power.attr,
0918     &dev_attr_adapter_diag_sfp_rx_power.attr,
0919     &dev_attr_adapter_diag_sfp_port_tx_type.attr,
0920     &dev_attr_adapter_diag_sfp_optical_port.attr,
0921     &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
0922     &dev_attr_adapter_diag_sfp_connector_type.attr,
0923     &dev_attr_adapter_diag_sfp_fec_active.attr,
0924     &dev_attr_adapter_diag_b2b_credit.attr,
0925     NULL,
0926 };
0927 
0928 static const struct attribute_group zfcp_sysfs_diag_attr_group = {
0929     .name = "diagnostics",
0930     .attrs = zfcp_sysfs_diag_attrs,
0931 };
0932 
0933 const struct attribute_group *zfcp_sysfs_adapter_attr_groups[] = {
0934     &zfcp_sysfs_adapter_attr_group,
0935     &zfcp_sysfs_diag_attr_group,
0936     NULL,
0937 };
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