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path: root/drivers/s390/scsi/zfcp_scsi.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_scsi.c')
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c183
1 files changed, 136 insertions, 47 deletions
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index b9daf5c0586..01687559dc0 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -31,6 +31,7 @@ static int zfcp_scsi_queuecommand(struct scsi_cmnd *,
void (*done) (struct scsi_cmnd *));
static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *);
+static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *);
static int zfcp_task_management_function(struct zfcp_unit *, u8,
struct scsi_cmnd *);
@@ -39,6 +40,7 @@ static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int,
unsigned int, unsigned int);
static struct device_attribute *zfcp_sysfs_sdev_attrs[];
+static struct device_attribute *zfcp_a_stats_attrs[];
struct zfcp_data zfcp_data = {
.scsi_host_template = {
@@ -51,6 +53,7 @@ struct zfcp_data zfcp_data = {
.queuecommand = zfcp_scsi_queuecommand,
.eh_abort_handler = zfcp_scsi_eh_abort_handler,
.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
+ .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
.can_queue = 4096,
.this_id = -1,
@@ -59,6 +62,7 @@ struct zfcp_data zfcp_data = {
.use_clustering = 1,
.sdev_attrs = zfcp_sysfs_sdev_attrs,
.max_sectors = ZFCP_MAX_SECTORS,
+ .shost_attrs = zfcp_a_stats_attrs,
},
.driver_version = ZFCP_VERSION,
};
@@ -179,11 +183,10 @@ static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
if (unit) {
- zfcp_erp_wait(unit->port->adapter);
atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
sdpnt->hostdata = NULL;
unit->device = NULL;
- zfcp_erp_unit_failed(unit);
+ zfcp_erp_unit_failed(unit, 12, NULL);
zfcp_unit_put(unit);
} else
ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at "
@@ -442,58 +445,32 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
return retval;
}
-static int
-zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
+static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
{
int retval;
- struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata;
+ struct zfcp_unit *unit = scpnt->device->hostdata;
if (!unit) {
- ZFCP_LOG_NORMAL("bug: Tried reset for nonexistent unit\n");
- retval = SUCCESS;
- goto out;
+ WARN_ON(1);
+ return SUCCESS;
}
- ZFCP_LOG_NORMAL("resetting unit 0x%016Lx on port 0x%016Lx, adapter %s\n",
- unit->fcp_lun, unit->port->wwpn,
- zfcp_get_busid_by_adapter(unit->port->adapter));
+ retval = zfcp_task_management_function(unit,
+ FCP_LOGICAL_UNIT_RESET,
+ scpnt);
+ return retval ? FAILED : SUCCESS;
+}
- /*
- * If we do not know whether the unit supports 'logical unit reset'
- * then try 'logical unit reset' and proceed with 'target reset'
- * if 'logical unit reset' fails.
- * If the unit is known not to support 'logical unit reset' then
- * skip 'logical unit reset' and try 'target reset' immediately.
- */
- if (!atomic_test_mask(ZFCP_STATUS_UNIT_NOTSUPPUNITRESET,
- &unit->status)) {
- retval = zfcp_task_management_function(unit,
- FCP_LOGICAL_UNIT_RESET,
- scpnt);
- if (retval) {
- ZFCP_LOG_DEBUG("unit reset failed (unit=%p)\n", unit);
- if (retval == -ENOTSUPP)
- atomic_set_mask
- (ZFCP_STATUS_UNIT_NOTSUPPUNITRESET,
- &unit->status);
- /* fall through and try 'target reset' next */
- } else {
- ZFCP_LOG_DEBUG("unit reset succeeded (unit=%p)\n",
- unit);
- /* avoid 'target reset' */
- retval = SUCCESS;
- goto out;
- }
+static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
+{
+ int retval;
+ struct zfcp_unit *unit = scpnt->device->hostdata;
+
+ if (!unit) {
+ WARN_ON(1);
+ return SUCCESS;
}
retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt);
- if (retval) {
- ZFCP_LOG_DEBUG("target reset failed (unit=%p)\n", unit);
- retval = FAILED;
- } else {
- ZFCP_LOG_DEBUG("target reset succeeded (unit=%p)\n", unit);
- retval = SUCCESS;
- }
- out:
- return retval;
+ return retval ? FAILED : SUCCESS;
}
static int
@@ -553,7 +530,7 @@ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
unit->fcp_lun, unit->port->wwpn,
zfcp_get_busid_by_adapter(unit->port->adapter));
- zfcp_erp_adapter_reopen(adapter, 0);
+ zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt);
zfcp_erp_wait(adapter);
return SUCCESS;
@@ -834,4 +811,116 @@ static struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
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;
+ int retval;
+ struct zfcp_adapter *adapter;
+
+ 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 int zfcp_sysfs_adapter_ex_config(struct device *dev,
+ struct fsf_statistics_info *stat_inf)
+{
+ int retval;
+ struct fsf_qtcb_bottom_config *qtcb_config;
+ struct Scsi_Host *scsi_host = dev_to_shost(dev);
+ struct zfcp_adapter *adapter;
+
+ 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;
+}
+
+static ssize_t zfcp_sysfs_adapter_request_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, "%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);
+}
+
+static ssize_t zfcp_sysfs_adapter_mb_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, "%llu %llu\n",
+ (unsigned long long) stat_info.input_mb,
+ (unsigned long long) stat_info.output_mb);
+}
+
+static ssize_t zfcp_sysfs_adapter_sec_active_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, "%llu\n",
+ (unsigned long long) stat_info.seconds_act);
+}
+
+static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
+static DEVICE_ATTR(requests, S_IRUGO, zfcp_sysfs_adapter_request_show, NULL);
+static DEVICE_ATTR(megabytes, S_IRUGO, zfcp_sysfs_adapter_mb_show, NULL);
+static DEVICE_ATTR(seconds_active, S_IRUGO,
+ zfcp_sysfs_adapter_sec_active_show, NULL);
+
+static struct device_attribute *zfcp_a_stats_attrs[] = {
+ &dev_attr_utilization,
+ &dev_attr_requests,
+ &dev_attr_megabytes,
+ &dev_attr_seconds_active,
+ NULL
+};
+
#undef ZFCP_LOG_AREA
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-15 05:37:42 +0000