[SCSI] qla2xxx: Correct QUEUE_FULL handling.
- Drop queue-depths across all luns for a given fcport
during TASK_SET_FULL statuses.
- Ramp-up I/Os after throttling.
- Consolidate completion-status handling of CS_QUEUE_FULL with
CS_COMPLETE as ISP24xx firmware no longer reports
CS_QUEUE_FULL.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 626c717..d3b6df4 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -6,6 +6,8 @@
*/
#include "qla_def.h"
+#include <scsi/scsi_tcq.h>
+
static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
@@ -593,6 +595,67 @@
}
}
+static void
+qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
+{
+ fc_port_t *fcport = data;
+
+ if (fcport->ha->max_q_depth <= sdev->queue_depth)
+ return;
+
+ if (sdev->ordered_tags)
+ scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
+ sdev->queue_depth + 1);
+ else
+ scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
+ sdev->queue_depth + 1);
+
+ fcport->last_ramp_up = jiffies;
+
+ DEBUG2(qla_printk(KERN_INFO, fcport->ha,
+ "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
+ fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
+ sdev->queue_depth));
+}
+
+static void
+qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
+{
+ fc_port_t *fcport = data;
+
+ if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
+ return;
+
+ DEBUG2(qla_printk(KERN_INFO, fcport->ha,
+ "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
+ fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
+ sdev->queue_depth));
+}
+
+static inline void
+qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
+{
+ fc_port_t *fcport;
+ struct scsi_device *sdev;
+
+ sdev = sp->cmd->device;
+ if (sdev->queue_depth >= ha->max_q_depth)
+ return;
+
+ fcport = sp->fcport;
+ if (time_before(jiffies,
+ fcport->last_ramp_up + ql2xqfullrampup * HZ))
+ return;
+ if (time_before(jiffies,
+ fcport->last_queue_full + ql2xqfullrampup * HZ))
+ return;
+
+ spin_unlock_irq(&ha->hardware_lock);
+ starget_for_each_device(sdev->sdev_target, fcport,
+ qla2x00_adjust_sdev_qdepth_up);
+ spin_lock_irq(&ha->hardware_lock);
+}
+
/**
* qla2x00_process_completed_request() - Process a Fast Post response.
* @ha: SCSI driver HA context
@@ -624,6 +687,8 @@
/* Save ISP completion status */
sp->cmd->result = DID_OK << 16;
+
+ qla2x00_ramp_up_queue_depth(ha, sp);
qla2x00_sp_compl(ha, sp);
} else {
DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
@@ -823,6 +888,7 @@
*/
switch (comp_status) {
case CS_COMPLETE:
+ case CS_QUEUE_FULL:
if (scsi_status == 0) {
cp->result = DID_OK << 16;
break;
@@ -849,6 +915,20 @@
}
cp->result = DID_OK << 16 | lscsi_status;
+ if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
+ DEBUG2(printk(KERN_INFO
+ "scsi(%ld): QUEUE FULL status detected "
+ "0x%x-0x%x.\n", ha->host_no, comp_status,
+ scsi_status));
+
+ /* Adjust queue depth for all luns on the port. */
+ fcport->last_queue_full = jiffies;
+ spin_unlock_irq(&ha->hardware_lock);
+ starget_for_each_device(cp->device->sdev_target,
+ fcport, qla2x00_adjust_sdev_qdepth_down);
+ spin_lock_irq(&ha->hardware_lock);
+ break;
+ }
if (lscsi_status != SS_CHECK_CONDITION)
break;
@@ -1066,17 +1146,6 @@
qla2x00_mark_device_lost(ha, fcport, 1, 1);
break;
- case CS_QUEUE_FULL:
- DEBUG2(printk(KERN_INFO
- "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
- ha->host_no, comp_status, scsi_status));
-
- /* SCSI Mid-Layer handles device queue full */
-
- cp->result = DID_OK << 16 | lscsi_status;
-
- break;
-
default:
DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
"0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));