[Qemu-devel] [PATCH v2 02/15] virtio: redefine structure & memory cache for packed ring

[wexu]

From: Wei Xu <address@hidden>

Redefine packed ring structure according to Qemu nomenclature,
field data(wrap counter, etc) are introduced also.

Signed-off-by: Wei Xu <address@hidden>
---
 hw/virtio/virtio.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 22bd1ac..827e745 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -39,6 +39,13 @@ 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;
@@ -77,6 +84,11 @@ typedef struct VRing
     VRingMemoryRegionCaches *caches;
 } VRing;
 
+typedef struct VRingPackedDescEvent {
+    uint16_t off_wrap;
+    uint16_t flags;
+} VRingPackedDescEvent ;
+
 struct VirtQueue
 {
     VRing vring;
@@ -87,7 +99,11 @@ struct VirtQueue
     /* Last avail_idx read from VQ. */
     uint16_t shadow_avail_idx;
 
+    bool event_wrap_counter;
+    bool avail_wrap_counter;
+
     uint16_t used_idx;
+    bool used_wrap_counter;
 
     /* Last used index value we have signalled on */
     uint16_t signalled_used;
-- 
1.8.3.1