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authorWei Xu <wexu@redhat.com>2019-10-25 10:35:20 +0200
committerMichael S. Tsirkin <mst@redhat.com>2019-10-25 07:46:22 -0400
commita40dcec9fcbf63bcdc013bb20970651b237203ef (patch)
tree9437c4f52973419fb9dff96a8152969d87955410 /hw
parent58560ad254fbda71d4daa6622d71683190070ee2 (diff)
virtio: basic structure for packed ring
Define packed ring structure according to Qemu nomenclature, field data(wrap counter, etc) are also included. Signed-off-by: Wei Xu <wexu@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Eugenio PĂ©rez <eperezma@redhat.com> Reviewed-by: Jens Freimann <jfreimann@redhat.com> Message-Id: <20191025083527.30803-2-eperezma@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/virtio/virtio.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 527df03bfd..fdac203cdf 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -43,6 +43,13 @@ typedef struct VRingDesc
uint16_t next;
} VRingDesc;
+typedef struct VRingPackedDesc {
+ uint64_t addr;
+ uint32_t len;
+ uint16_t id;
+ uint16_t flags;
+} VRingPackedDesc;
+
typedef struct VRingAvail
{
uint16_t flags;
@@ -81,17 +88,25 @@ typedef struct VRing
VRingMemoryRegionCaches *caches;
} VRing;
+typedef struct VRingPackedDescEvent {
+ uint16_t off_wrap;
+ uint16_t flags;
+} VRingPackedDescEvent ;
+
struct VirtQueue
{
VRing vring;
/* Next head to pop */
uint16_t last_avail_idx;
+ bool last_avail_wrap_counter;
/* Last avail_idx read from VQ. */
uint16_t shadow_avail_idx;
+ bool shadow_avail_wrap_counter;
uint16_t used_idx;
+ bool used_wrap_counter;
/* Last used index value we have signalled on */
uint16_t signalled_used;