[SCSI] qla2xxx: Add change_queue_depth/type() API support.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 29cf3f510935..413ccc152de5 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -111,6 +111,9 @@ static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
 
+static int qla2x00_change_queue_depth(struct scsi_device *, int);
+static int qla2x00_change_queue_type(struct scsi_device *, int);
+
 static struct scsi_host_template qla2x00_driver_template = {
         .module                 = THIS_MODULE,
         .name                   = "qla2xxx",
@@ -125,6 +128,8 @@ static struct scsi_host_template qla2x00_driver_template = {
 
         .slave_alloc            = qla2xxx_slave_alloc,
         .slave_destroy          = qla2xxx_slave_destroy,
+        .change_queue_depth     = qla2x00_change_queue_depth,
+        .change_queue_type      = qla2x00_change_queue_type,
         .this_id                = -1,
         .cmd_per_lun            = 3,
         .use_clustering         = ENABLE_CLUSTERING,
@@ -151,6 +156,8 @@ static struct scsi_host_template qla24xx_driver_template = {
 
         .slave_alloc            = qla2xxx_slave_alloc,
         .slave_destroy          = qla2xxx_slave_destroy,
+        .change_queue_depth     = qla2x00_change_queue_depth,
+        .change_queue_type      = qla2x00_change_queue_type,
         .this_id                = -1,
         .cmd_per_lun            = 3,
         .use_clustering         = ENABLE_CLUSTERING,
@@ -1109,6 +1116,28 @@ qla2xxx_slave_destroy(struct scsi_device *sdev)
         sdev->hostdata = NULL;
 }
 
+static int
+qla2x00_change_queue_depth(struct scsi_device *sdev, int qdepth)
+{
+        scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
+        return sdev->queue_depth;
+}
+
+static int
+qla2x00_change_queue_type(struct scsi_device *sdev, int tag_type)
+{
+        if (sdev->tagged_supported) {
+                scsi_set_tag_type(sdev, tag_type);
+                if (tag_type)
+                        scsi_activate_tcq(sdev, sdev->queue_depth);
+                else
+                        scsi_deactivate_tcq(sdev, sdev->queue_depth);
+        } else
+                tag_type = 0;
+
+        return tag_type;
+}
+
 /**
  * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
  * @ha: HA context