[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;
 }