diff options
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 1 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 24 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 1 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 13 |
4 files changed, 32 insertions, 7 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 67f45fc..74d7529 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -568,6 +568,7 @@ struct zfcp_adapter { struct fsf_qtcb_bottom_port *stats_reset_data; unsigned long stats_reset; struct work_struct scan_work; + atomic_t qdio_outb_full; /* queue full incidents */ }; struct zfcp_port { diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index 49dbeb7..9e083a5 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -717,6 +717,14 @@ static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue) return 0; } +static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter) +{ + unsigned int count = atomic_read(&adapter->req_q.count); + if (!count) + atomic_inc(&adapter->qdio_outb_full); + return count > 0; +} + static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) { long ret; @@ -727,6 +735,8 @@ static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) zfcp_fsf_sbal_check(req_q), 5 * HZ); if (ret > 0) return 0; + if (!ret) + atomic_inc(&adapter->qdio_outb_full); spin_lock_bh(&req_q->lock); return -EIO; @@ -984,7 +994,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, struct zfcp_fsf_req *req = NULL; spin_lock(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, req_flags, adapter->pool.fsf_req_abort); @@ -1219,7 +1229,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els) return -EBUSY; spin_lock(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, ZFCP_REQ_AUTO_CLEANUP, NULL); @@ -1264,7 +1274,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) int retval = -EIO; spin_lock_bh(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, @@ -1360,7 +1370,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) return -EOPNOTSUPP; spin_lock_bh(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, ZFCP_REQ_AUTO_CLEANUP, @@ -1406,7 +1416,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, return -EOPNOTSUPP; spin_lock_bh(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0, @@ -2224,7 +2234,7 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, return -EBUSY; spin_lock(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, adapter->pool.fsf_req_scsi); @@ -2347,7 +2357,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter, return NULL; spin_lock(&adapter->req_q.lock); - if (!atomic_read(&adapter->req_q.count)) + if (!zfcp_fsf_sbal_available(adapter)) goto out; req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, adapter->pool.fsf_req_scsi); diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 69d632d..cc49eaa 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -282,6 +282,7 @@ static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req, addr += length, remaining -= length) { sbale = zfcp_qdio_sbale_next(fsf_req, sbtype); if (!sbale) { + atomic_inc(&fsf_req->adapter->qdio_outb_full); zfcp_qdio_undo_sbals(fsf_req); return -EINVAL; } diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 2e85c6c..7e85757 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -487,10 +487,23 @@ ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n", 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_adapter *adapter = + (struct zfcp_adapter *) scsi_host->hostdata[0]; + + return sprintf(buf, "%d\n", atomic_read(&adapter->qdio_outb_full)); +} +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 }; |