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virtio-scsi: introduce a constant for fixed virtqueues

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The event and control virtqueues are always present, regardless of the
multi-queue configuration.  Define a constant so that virtqueue number
calculations are easier to read.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20200818143348.310613-5-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2020-08-18 15:33:45 +01:00 • committed by Michael S. Tsirkin
parent 1436f32a84
commit 4e5163bd84
6 changed files with 14 additions and 7 deletions
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3
include/hw/virtio/virtio-scsi.h
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@ -36,6 +36,9 @@
#define VIRTIO_SCSI_MAX_TARGET 255
#define VIRTIO_SCSI_MAX_LUN 16383
/* Number of virtqueues that are always present */
#define VIRTIO_SCSI_VQ_NUM_FIXED 2
typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;