2 files changed, 130 insertions, 2 deletions

diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h
index 8cce5cc11d50..099970b27001 100644
--- a/drivers/s390/scsi/zfcp_fsf.h
+++ b/drivers/s390/scsi/zfcp_fsf.h
@@ -213,6 +213,7 @@
 #define FSF_FEATURE_HBAAPI_MANAGEMENT           0x00000010
 #define FSF_FEATURE_ELS_CT_CHAINED_SBALS        0x00000020
 #define FSF_FEATURE_UPDATE_ALERT                0x00000100
+#define FSF_FEATURE_MEASUREMENT_DATA            0x00000200
 
 /* host connection features */
 #define FSF_FEATURE_NPIV_MODE                   0x00000001
@@ -340,6 +341,15 @@ struct fsf_qtcb_prefix {
         u8  res1[20];
 } __attribute__ ((packed));
 
+struct fsf_statistics_info {
+        u64 input_req;
+        u64 output_req;
+        u64 control_req;
+        u64 input_mb;
+        u64 output_mb;
+        u64 seconds_act;
+} __attribute__ ((packed));
+
 union fsf_status_qual {
         u8  byte[FSF_STATUS_QUALIFIER_SIZE];
         u16 halfword[FSF_STATUS_QUALIFIER_SIZE / sizeof (u16)];
@@ -436,7 +446,8 @@ struct fsf_qtcb_bottom_config {
         u32 hardware_version;
         u8 serial_number[32];
         struct fsf_nport_serv_param plogi_payload;
-        u8 res4[160];
+        struct fsf_statistics_info stat_info;
+        u8 res4[112];
 } __attribute__ ((packed));
 
 struct fsf_qtcb_bottom_port {
@@ -469,7 +480,10 @@ struct fsf_qtcb_bottom_port {
         u64 control_requests;
         u64 input_mb;           /* where 1 MByte == 1.000.000 Bytes */
         u64 output_mb;          /* where 1 MByte == 1.000.000 Bytes */
-        u8 res2[256];
+        u8 cp_util;
+        u8 cb_util;
+        u8 a_util;
+        u8 res2[253];
 } __attribute__ ((packed));
 
 union fsf_qtcb_bottom {
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index f81850624eed..01687559dc06 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -40,6 +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 = {
@@ -61,6 +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,
 };
@@ -809,4 +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