diff mbox series

[V5,1/6] virtio: basic structure for packed ring

Message ID 20190802040606.22573-2-jasowang@redhat.com (mailing list archive)
State New, archived
Headers show
Series Packed virtqueue for virtrio | expand

Commit Message

Jason Wang Aug. 2, 2019, 4:06 a.m. UTC 
From: Wei Xu <wexu@redhat.com>

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>
---
 hw/virtio/virtio.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Comments

Jens Freimann Aug. 2, 2019, 9:01 a.m. UTC | #1 
On Fri, Aug 02, 2019 at 12:06:01AM -0400, Jason Wang wrote:
>From: Wei Xu <wexu@redhat.com>
>
>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>
>---
> hw/virtio/virtio.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>

Reviewed-by: Jens Freimann <jfreimann@redhat.com>
diff mbox series

Patch

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index a94ea18a9c..981738fa19 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;
@@ -77,17 +84,25 @@  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;