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Diffstat (limited to 'drivers/s390/scsi/zfcp_sysfs.c')
-rw-r--r--drivers/s390/scsi/zfcp_sysfs.c496
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 000000000000..2e85c6c49e7d
--- /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
+};