[SCSI] qla2xxx: Queue depth ramp up/down modification changes.

Removed the module parameters ql2xqfulltracking and ql2xqfullrampup
since the queue depth ramp up/down functionality is moved to scsi-ml.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 51 insertions, 18 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 58edc0deb74b..2f873d237325 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -78,21 +78,6 @@ module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(ql2xmaxqdepth,
 		"Maximum queue depth to report for target devices.");
 
-int ql2xqfulltracking = 1;
-module_param(ql2xqfulltracking, int, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(ql2xqfulltracking,
-		"Controls whether the driver tracks queue full status "
-		"returns and dynamically adjusts a scsi device's queue "
-		"depth.  Default is 1, perform tracking.  Set to 0 to "
-		"disable dynamic tracking and adjustment of queue depth.");
-
-int ql2xqfullrampup = 120;
-module_param(ql2xqfullrampup, int, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(ql2xqfullrampup,
-		"Number of seconds to wait to begin to ramp-up the queue "
-		"depth for a device after a queue-full condition has been "
-		"detected.  Default is 120 seconds.");
-
 int ql2xiidmaenable=1;
 module_param(ql2xiidmaenable, int, S_IRUGO|S_IRUSR);
 MODULE_PARM_DESC(ql2xiidmaenable,
@@ -1217,13 +1202,61 @@ qla2xxx_slave_destroy(struct scsi_device *sdev)
 	sdev->hostdata = NULL;
 }
 
+static void qla2x00_handle_queue_full(struct scsi_device *sdev, int qdepth)
+{
+	fc_port_t *fcport = (struct fc_port *) sdev->hostdata;
+
+	if (!scsi_track_queue_full(sdev, qdepth))
+		return;
+
+	DEBUG2(qla_printk(KERN_INFO, fcport->vha->hw,
+		"scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
+		fcport->vha->host_no, sdev->channel, sdev->id, sdev->lun,
+		sdev->queue_depth));
+}
+
+static void qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, int qdepth)
+{
+	fc_port_t *fcport = sdev->hostdata;
+	struct scsi_qla_host *vha = fcport->vha;
+	struct qla_hw_data *ha = vha->hw;
+	struct req_que *req = NULL;
+
+	req = vha->req;
+	if (!req)
+		return;
+
+	if (req->max_q_depth <= sdev->queue_depth || req->max_q_depth < qdepth)
+		return;
+
+	if (sdev->ordered_tags)
+		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, qdepth);
+	else
+		scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, qdepth);
+
+	DEBUG2(qla_printk(KERN_INFO, ha,
+	       "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
+	       fcport->vha->host_no, sdev->channel, sdev->id, sdev->lun,
+	       sdev->queue_depth));
+}
+
 static int
 qla2x00_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
 {
-	if (reason != SCSI_QDEPTH_DEFAULT)
-		return -EOPNOTSUPP;
+	switch (reason) {
+	case SCSI_QDEPTH_DEFAULT:
+		scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
+		break;
+	case SCSI_QDEPTH_QFULL:
+		qla2x00_handle_queue_full(sdev, qdepth);
+		break;
+	case SCSI_QDEPTH_RAMP_UP:
+		qla2x00_adjust_sdev_qdepth_up(sdev, qdepth);
+		break;
+	default:
+		return EOPNOTSUPP;
+	}
 
-	scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
 	return sdev->queue_depth;
 }