diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 1 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 3 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 20 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 3 |
4 files changed, 26 insertions, 1 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 497986f6d64..969a3f09303 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -501,6 +501,7 @@ int zfcp_adapter_enqueue(struct ccw_device *ccw_device) spin_lock_init(&adapter->scsi_dbf_lock); spin_lock_init(&adapter->rec_dbf_lock); spin_lock_init(&adapter->req_q_lock); + spin_lock_init(&adapter->qdio_stat_lock); rwlock_init(&adapter->erp_lock); rwlock_init(&adapter->abort_lock); diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 56302a1a4b6..a0cd4b08017 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -445,6 +445,9 @@ struct zfcp_adapter { spinlock_t req_q_lock; /* for operations on queue */ int req_q_pci_batch; /* SBALs since PCI indication was last set */ + ktime_t req_q_time; /* time of last fill level change */ + u64 req_q_util; /* for accounting */ + spinlock_t qdio_stat_lock; u32 fsf_req_seq_no; /* FSF cmnd seq number */ wait_queue_head_t request_wq; /* can be used to wait for more avaliable SBALs */ diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 33e0a206a0a..3d068709027 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -77,6 +77,23 @@ static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt) } } +/* this needs to be called prior to updating the queue fill level */ +static void zfcp_qdio_account(struct zfcp_adapter *adapter) +{ + ktime_t now; + s64 span; + int free, used; + + spin_lock(&adapter->qdio_stat_lock); + now = ktime_get(); + span = ktime_us_delta(now, adapter->req_q_time); + free = max(0, atomic_read(&adapter->req_q.count)); + used = QDIO_MAX_BUFFERS_PER_Q - free; + adapter->req_q_util += used * span; + adapter->req_q_time = now; + spin_unlock(&adapter->qdio_stat_lock); +} + static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err, int queue_no, int first, int count, unsigned long parm) @@ -93,6 +110,7 @@ static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err, /* cleanup all SBALs being program-owned now */ zfcp_qdio_zero_sbals(queue->sbal, first, count); + zfcp_qdio_account(adapter); atomic_add(count, &queue->count); wake_up(&adapter->request_wq); } @@ -359,6 +377,8 @@ int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req) sbale->flags |= SBAL_FLAGS0_PCI; } + zfcp_qdio_account(adapter); + retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, first, count); if (unlikely(retval)) { diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 899af2b45b1..9e9931af1b5 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -487,7 +487,8 @@ static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev, struct zfcp_adapter *adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; - return sprintf(buf, "%d\n", atomic_read(&adapter->qdio_outb_full)); + return sprintf(buf, "%d %llu\n", atomic_read(&adapter->qdio_outb_full), + (unsigned long long)adapter->req_q_util); } static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL); |