From a40dcec9fcbf63bcdc013bb20970651b237203ef Mon Sep 17 00:00:00 2001 From: Wei Xu Date: Fri, 25 Oct 2019 10:35:20 +0200 Subject: virtio: basic structure for packed ring MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Define packed ring structure according to Qemu nomenclature, field data(wrap counter, etc) are also included. Signed-off-by: Wei Xu Signed-off-by: Jason Wang Signed-off-by: Eugenio Pérez Reviewed-by: Jens Freimann Message-Id: <20191025083527.30803-2-eperezma@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'hw/virtio') diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 527df03..fdac203 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; -- cgit v1.1