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linux/drivers/s390/scsi/zfcp_sysfs.c

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/*
* zfcp device driver
*
* sysfs attributes.
*
* Copyright IBM Corporation 2008
*/
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#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",
(unsigned long long) adapter->peer_wwnn);
ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n",
(unsigned long long) 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; \
\
mutex_lock(&zfcp_data.config_mutex); \
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: \
mutex_unlock(&zfcp_data.config_mutex); \
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, "syafai1", "syafai2");
ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");
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_fc_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;
u64 wwpn;
int retval = 0;
LIST_HEAD(port_remove_lh);
mutex_lock(&zfcp_data.config_mutex);
if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
retval = -EBUSY;
goto out;
}
if (strict_strtoull(buf, 0, (unsigned long long *) &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, &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, "syprs_1", NULL);
zfcp_erp_wait(adapter);
zfcp_port_put(port);
zfcp_port_dequeue(port);
out:
mutex_unlock(&zfcp_data.config_mutex);
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;
u64 fcp_lun;
int retval = -EINVAL;
mutex_lock(&zfcp_data.config_mutex);
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
retval = -EBUSY;
goto out;
}
if (strict_strtoull(buf, 0, (unsigned long long *) &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, "syuas_1", NULL);
zfcp_erp_wait(unit->port->adapter);
flush_work(&unit->scsi_work);
zfcp_unit_put(unit);
out:
mutex_unlock(&zfcp_data.config_mutex);
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;
u64 fcp_lun;
int retval = 0;
LIST_HEAD(unit_remove_lh);
mutex_lock(&zfcp_data.config_mutex);
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
retval = -EBUSY;
goto out;
}
if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
retval = -EINVAL;
goto out;
}
write_lock_irq(&zfcp_data.config_lock);
unit = zfcp_get_unit_by_lun(port, fcp_lun);
if (unit) {
write_unlock_irq(&zfcp_data.config_lock);
/* wait for possible timeout during SCSI probe */
flush_work(&unit->scsi_work);
write_lock_irq(&zfcp_data.config_lock);
if (atomic_read(&unit->refcount) == 0) {
zfcp_unit_get(unit);
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
&unit->status);
list_move(&unit->list, &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, "syurs_1", NULL);
zfcp_erp_wait(unit->port->adapter);
zfcp_unit_put(unit);
zfcp_unit_dequeue(unit);
out:
mutex_unlock(&zfcp_data.config_mutex);
return retval ? retval : (ssize_t) count;
}
static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
static struct attribute *zfcp_port_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_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 long fsum, fmin, fmax, csum, cmin, cmax, cc; \
\
spin_lock_bh(&lat->lock); \
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_bh(&lat->lock); \
\
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",
dev_name(&unit->port->adapter->ccw_device->dev));
ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
(unsigned long long) unit->port->wwpn);
ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
(unsigned long long) 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->qdio, 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->qdio, 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);
static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *scsi_host = class_to_shost(dev);
struct zfcp_qdio *qdio =
((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
u64 util;
spin_lock_bh(&qdio->stat_lock);
util = qdio->req_q_util;
spin_unlock_bh(&qdio->stat_lock);
return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
(unsigned long long)util);
}
static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
struct device_attribute *zfcp_sysfs_shost_attrs[] = {
&dev_attr_utilization,
&dev_attr_requests,
&dev_attr_megabytes,
&dev_attr_seconds_active,
&dev_attr_queue_full,
NULL
};
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