[PATCH v1 1/4] virtio: introduce VIRTQUEUE_DEFUALT_SIZE instead of hardcoded constants

[Denis Plotnikov <dplotnikov@virtuozzo.com>]

Signed-off-by: Denis Plotnikov <dplotnikov@virtuozzo.com>
---
 hw/block/virtio-blk.c      | 6 ++++--
 hw/scsi/virtio-scsi.c      | 5 +++--
 include/hw/virtio/virtio.h | 1 +
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 09f46ed85f..72f935033f 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -914,7 +914,8 @@ static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config)
     memset(&blkcfg, 0, sizeof(blkcfg));
     virtio_stq_p(vdev, &blkcfg.capacity, capacity);
     virtio_stl_p(vdev, &blkcfg.seg_max,
-                 s->conf.seg_max_adjust ? s->conf.queue_size - 2 : 128 - 2);
+                 s->conf.seg_max_adjust ? s->conf.queue_size - 2 :
+                                          VIRTQUEUE_DEFAULT_SIZE - 2);
     virtio_stw_p(vdev, &blkcfg.geometry.cylinders, conf->cyls);
     virtio_stl_p(vdev, &blkcfg.blk_size, blk_size);
     virtio_stw_p(vdev, &blkcfg.min_io_size, conf->min_io_size / blk_size);
@@ -1272,7 +1273,8 @@ static Property virtio_blk_properties[] = {
     DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, 0,
                     true),
     DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues, 1),
-    DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 128),
+    DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size,
+                       VIRTQUEUE_DEFAULT_SIZE),
     DEFINE_PROP_BOOL("seg-max-adjust", VirtIOBlock, conf.seg_max_adjust, true),
     DEFINE_PROP_LINK("iothread", VirtIOBlock, conf.iothread, TYPE_IOTHREAD,
                      IOThread *),
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 3b61563609..36f66046ae 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -660,7 +660,8 @@ static void virtio_scsi_get_config(VirtIODevice *vdev,
 
     virtio_stl_p(vdev, &scsiconf->num_queues, s->conf.num_queues);
     virtio_stl_p(vdev, &scsiconf->seg_max,
-                 s->conf.seg_max_adjust ? s->conf.virtqueue_size - 2 : 128 - 2);
+                 s->conf.seg_max_adjust ? s->conf.virtqueue_size - 2 :
+                                          VIRTQUEUE_DEFAULT_SIZE - 2);
     virtio_stl_p(vdev, &scsiconf->max_sectors, s->conf.max_sectors);
     virtio_stl_p(vdev, &scsiconf->cmd_per_lun, s->conf.cmd_per_lun);
     virtio_stl_p(vdev, &scsiconf->event_info_size, sizeof(VirtIOSCSIEvent));
@@ -965,7 +966,7 @@ static void virtio_scsi_device_unrealize(DeviceState *dev, Error **errp)
 static Property virtio_scsi_properties[] = {
     DEFINE_PROP_UINT32("num_queues", VirtIOSCSI, parent_obj.conf.num_queues, 1),
     DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSI,
-                                         parent_obj.conf.virtqueue_size, 128),
+                       parent_obj.conf.virtqueue_size, VIRTQUEUE_DEFAULT_SIZE),
     DEFINE_PROP_BOOL("seg_max_adjust", VirtIOSCSI,
                       parent_obj.conf.seg_max_adjust, true),
     DEFINE_PROP_UINT32("max_sectors", VirtIOSCSI, parent_obj.conf.max_sectors,
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index b69d517496..a66ea2368b 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -48,6 +48,7 @@ size_t virtio_feature_get_config_size(VirtIOFeature *features,
 typedef struct VirtQueue VirtQueue;
 
 #define VIRTQUEUE_MAX_SIZE 1024
+#define VIRTQUEUE_DEFAULT_SIZE 128
 
 typedef struct VirtQueueElement
 {
-- 
2.17.0