diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_sysfs.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 496 |
1 files changed, 496 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c new file mode 100644 index 0000000..2e85c6c --- /dev/null +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -0,0 +1,496 @@ +/* + * zfcp device driver + * + * sysfs attributes. + * + * Copyright IBM Corporation 2008 + */ + +#include "zfcp_ext.h" + +#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \ +struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\ + _show, _store) +#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \ +static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \ + struct device_attribute *at,\ + char *buf) \ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + \ + return sprintf(buf, _format, _value); \ +} \ +static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \ + zfcp_sysfs_##_feat##_##_name##_show, NULL); + +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n", + atomic_read(&adapter->status)); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n", + adapter->peer_wwnn); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n", + adapter->peer_wwpn); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n", + adapter->peer_d_id); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n", + adapter->hydra_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n", + adapter->fsf_lic_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n", + adapter->hardware_version); +ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n", + (atomic_read(&adapter->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); + +ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n", + atomic_read(&port->status)); +ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n", + (atomic_read(&port->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); +ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n", + (atomic_read(&port->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); + +ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n", + atomic_read(&unit->status)); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_SHARED) != 0); +ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n", + (atomic_read(&unit->status) & + ZFCP_STATUS_UNIT_READONLY) != 0); + +#define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id) \ +static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + \ + if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED) \ + return sprintf(buf, "1\n"); \ + else \ + return sprintf(buf, "0\n"); \ +} \ +static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \ + struct device_attribute *attr,\ + const char *buf, size_t count)\ +{ \ + struct _feat_def *_feat = dev_get_drvdata(dev); \ + unsigned long val; \ + int retval = 0; \ + \ + down(&zfcp_data.config_sema); \ + if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \ + retval = -EBUSY; \ + goto out; \ + } \ + \ + if (strict_strtoul(buf, 0, &val) || val != 0) { \ + retval = -EINVAL; \ + goto out; \ + } \ + \ + zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL, \ + ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\ + zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED, \ + _reopen_id, NULL); \ + zfcp_erp_wait(_adapter); \ +out: \ + up(&zfcp_data.config_sema); \ + return retval ? retval : (ssize_t) count; \ +} \ +static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \ + zfcp_sysfs_##_feat##_failed_show, \ + zfcp_sysfs_##_feat##_failed_store); + +ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, 44, 93); +ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, 45, 96); +ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, 46, 97); + +static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter = dev_get_drvdata(dev); + int ret; + + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) + return -EBUSY; + + ret = zfcp_scan_ports(adapter); + return ret ? ret : (ssize_t) count; +} +static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL, + zfcp_sysfs_port_rescan_store); + +static ssize_t zfcp_sysfs_port_remove_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter = dev_get_drvdata(dev); + struct zfcp_port *port; + wwn_t wwpn; + int retval = 0; + + down(&zfcp_data.config_sema); + if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &wwpn)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + port = zfcp_get_port_by_wwpn(adapter, wwpn); + if (port && (atomic_read(&port->refcount) == 0)) { + zfcp_port_get(port); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); + list_move(&port->list, &adapter->port_remove_lh); + } else + port = NULL; + write_unlock_irq(&zfcp_data.config_lock); + + if (!port) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_port_shutdown(port, 0, 92, NULL); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); + out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL, + zfcp_sysfs_port_remove_store); + +static struct attribute *zfcp_adapter_attrs[] = { + &dev_attr_adapter_failed.attr, + &dev_attr_adapter_in_recovery.attr, + &dev_attr_adapter_port_remove.attr, + &dev_attr_adapter_port_rescan.attr, + &dev_attr_adapter_peer_wwnn.attr, + &dev_attr_adapter_peer_wwpn.attr, + &dev_attr_adapter_peer_d_id.attr, + &dev_attr_adapter_card_version.attr, + &dev_attr_adapter_lic_version.attr, + &dev_attr_adapter_status.attr, + &dev_attr_adapter_hardware_version.attr, + NULL +}; + +struct attribute_group zfcp_sysfs_adapter_attrs = { + .attrs = zfcp_adapter_attrs, +}; + +static ssize_t zfcp_sysfs_unit_add_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_unit *unit; + fcp_lun_t fcp_lun; + int retval = -EINVAL; + + down(&zfcp_data.config_sema); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &fcp_lun)) + goto out; + + unit = zfcp_unit_enqueue(port, fcp_lun); + if (IS_ERR(unit)) + goto out; + + retval = 0; + + zfcp_erp_unit_reopen(unit, 0, 94, NULL); + zfcp_erp_wait(unit->port->adapter); + zfcp_unit_put(unit); +out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store); + +static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_unit *unit; + fcp_lun_t fcp_lun; + int retval = 0; + + down(&zfcp_data.config_sema); + if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) { + retval = -EBUSY; + goto out; + } + + if (strict_strtoull(buf, 0, &fcp_lun)) { + retval = -EINVAL; + goto out; + } + + write_lock_irq(&zfcp_data.config_lock); + unit = zfcp_get_unit_by_lun(port, fcp_lun); + if (unit && (atomic_read(&unit->refcount) == 0)) { + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); + list_move(&unit->list, &port->unit_remove_lh); + } else + unit = NULL; + + write_unlock_irq(&zfcp_data.config_lock); + + if (!unit) { + retval = -ENXIO; + goto out; + } + + zfcp_erp_unit_shutdown(unit, 0, 95, NULL); + zfcp_erp_wait(unit->port->adapter); + zfcp_unit_put(unit); + zfcp_unit_dequeue(unit); +out: + up(&zfcp_data.config_sema); + return retval ? retval : (ssize_t) count; +} +static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store); + +static struct attribute *zfcp_port_ns_attrs[] = { + &dev_attr_port_failed.attr, + &dev_attr_port_in_recovery.attr, + &dev_attr_port_status.attr, + &dev_attr_port_access_denied.attr, + NULL +}; + +/** + * zfcp_sysfs_ns_port_attrs - sysfs attributes for nameserver + */ +struct attribute_group zfcp_sysfs_ns_port_attrs = { + .attrs = zfcp_port_ns_attrs, +}; + +static struct attribute *zfcp_port_no_ns_attrs[] = { + &dev_attr_unit_add.attr, + &dev_attr_unit_remove.attr, + &dev_attr_port_failed.attr, + &dev_attr_port_in_recovery.attr, + &dev_attr_port_status.attr, + &dev_attr_port_access_denied.attr, + NULL +}; + +/** + * zfcp_sysfs_port_attrs - sysfs attributes for all other ports + */ +struct attribute_group zfcp_sysfs_port_attrs = { + .attrs = zfcp_port_no_ns_attrs, +}; + +static struct attribute *zfcp_unit_attrs[] = { + &dev_attr_unit_failed.attr, + &dev_attr_unit_in_recovery.attr, + &dev_attr_unit_status.attr, + &dev_attr_unit_access_denied.attr, + &dev_attr_unit_access_shared.attr, + &dev_attr_unit_access_readonly.attr, + NULL +}; + +struct attribute_group zfcp_sysfs_unit_attrs = { + .attrs = zfcp_unit_attrs, +}; + +#define ZFCP_DEFINE_LATENCY_ATTR(_name) \ +static ssize_t \ +zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) { \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + struct zfcp_latencies *lat = &unit->latencies; \ + struct zfcp_adapter *adapter = unit->port->adapter; \ + unsigned long flags; \ + unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \ + \ + spin_lock_irqsave(&lat->lock, flags); \ + fsum = lat->_name.fabric.sum * adapter->timer_ticks; \ + fmin = lat->_name.fabric.min * adapter->timer_ticks; \ + fmax = lat->_name.fabric.max * adapter->timer_ticks; \ + csum = lat->_name.channel.sum * adapter->timer_ticks; \ + cmin = lat->_name.channel.min * adapter->timer_ticks; \ + cmax = lat->_name.channel.max * adapter->timer_ticks; \ + cc = lat->_name.counter; \ + spin_unlock_irqrestore(&lat->lock, flags); \ + \ + do_div(fsum, 1000); \ + do_div(fmin, 1000); \ + do_div(fmax, 1000); \ + do_div(csum, 1000); \ + do_div(cmin, 1000); \ + do_div(cmax, 1000); \ + \ + return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \ + fmin, fmax, fsum, cmin, cmax, csum, cc); \ +} \ +static ssize_t \ +zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + struct zfcp_latencies *lat = &unit->latencies; \ + unsigned long flags; \ + \ + spin_lock_irqsave(&lat->lock, flags); \ + lat->_name.fabric.sum = 0; \ + lat->_name.fabric.min = 0xFFFFFFFF; \ + lat->_name.fabric.max = 0; \ + lat->_name.channel.sum = 0; \ + lat->_name.channel.min = 0xFFFFFFFF; \ + lat->_name.channel.max = 0; \ + lat->_name.counter = 0; \ + spin_unlock_irqrestore(&lat->lock, flags); \ + \ + return (ssize_t) count; \ +} \ +static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \ + zfcp_sysfs_unit_##_name##_latency_show, \ + zfcp_sysfs_unit_##_name##_latency_store); + +ZFCP_DEFINE_LATENCY_ATTR(read); +ZFCP_DEFINE_LATENCY_ATTR(write); +ZFCP_DEFINE_LATENCY_ATTR(cmd); + +#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ +static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ +{ \ + struct scsi_device *sdev = to_scsi_device(dev); \ + struct zfcp_unit *unit = sdev->hostdata; \ + \ + return sprintf(buf, _format, _value); \ +} \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); + +ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", + unit->port->adapter->ccw_device->dev.bus_id); +ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn); +ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun); + +struct device_attribute *zfcp_sysfs_sdev_attrs[] = { + &dev_attr_fcp_lun, + &dev_attr_wwpn, + &dev_attr_hba_id, + &dev_attr_read_latency, + &dev_attr_write_latency, + &dev_attr_cmd_latency, + NULL +}; + +static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct Scsi_Host *scsi_host = dev_to_shost(dev); + struct fsf_qtcb_bottom_port *qtcb_port; + struct zfcp_adapter *adapter; + int retval; + + adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; + if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) + return -EOPNOTSUPP; + + qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL); + if (!qtcb_port) + return -ENOMEM; + + retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port); + if (!retval) + retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util, + qtcb_port->cb_util, qtcb_port->a_util); + kfree(qtcb_port); + return retval; +} +static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL); + +static int zfcp_sysfs_adapter_ex_config(struct device *dev, + struct fsf_statistics_info *stat_inf) +{ + struct Scsi_Host *scsi_host = dev_to_shost(dev); + struct fsf_qtcb_bottom_config *qtcb_config; + struct zfcp_adapter *adapter; + int retval; + + adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; + if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) + return -EOPNOTSUPP; + + qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config), + GFP_KERNEL); + if (!qtcb_config) + return -ENOMEM; + + retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config); + if (!retval) + *stat_inf = qtcb_config->stat_info; + + kfree(qtcb_config); + return retval; +} + +#define ZFCP_SHOST_ATTR(_name, _format, _arg...) \ +static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ +{ \ + struct fsf_statistics_info stat_info; \ + int retval; \ + \ + retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \ + if (retval) \ + return retval; \ + \ + return sprintf(buf, _format, ## _arg); \ +} \ +static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL); + +ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n", + (unsigned long long) stat_info.input_req, + (unsigned long long) stat_info.output_req, + (unsigned long long) stat_info.control_req); + +ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n", + (unsigned long long) stat_info.input_mb, + (unsigned long long) stat_info.output_mb); + +ZFCP_SHOST_ATTR(seconds_active, "%llu\n", + (unsigned long long) stat_info.seconds_act); + +struct device_attribute *zfcp_sysfs_shost_attrs[] = { + &dev_attr_utilization, + &dev_attr_requests, + &dev_attr_megabytes, + &dev_attr_seconds_active, + NULL +}; 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