From patchwork Fri Aug 2 04:06:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 1140952 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 460DBH2Dsxz9sML for ; Fri, 2 Aug 2019 14:06:46 +1000 (AEST) Received: from localhost ([::1]:60290 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htOq4-0005h1-Fo for incoming@patchwork.ozlabs.org; Fri, 02 Aug 2019 00:06:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50411) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htOpo-0005cw-By for qemu-devel@nongnu.org; Fri, 02 Aug 2019 00:06:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1htOpn-0001Sa-CK for qemu-devel@nongnu.org; Fri, 02 Aug 2019 00:06:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41430) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1htOpn-0001Rx-77 for qemu-devel@nongnu.org; Fri, 02 Aug 2019 00:06:27 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8310131E7D0; Fri, 2 Aug 2019 04:06:26 +0000 (UTC) Received: from hp-dl380pg8-01.lab.eng.pek2.redhat.com (hp-dl380pg8-01.lab.eng.pek2.redhat.com [10.73.8.10]) by smtp.corp.redhat.com (Postfix) with ESMTP id 45D7A1001B02; Fri, 2 Aug 2019 04:06:21 +0000 (UTC) From: Jason Wang To: mst@redhat.com Date: Fri, 2 Aug 2019 00:06:01 -0400 Message-Id: <20190802040606.22573-2-jasowang@redhat.com> In-Reply-To: <20190802040606.22573-1-jasowang@redhat.com> References: <20190802040606.22573-1-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 02 Aug 2019 04:06:26 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH V5 1/6] virtio: basic structure for packed ring X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yang.zhong@intel.com, tiwei.bie@intel.com, Jason Wang , qemu-devel@nongnu.org, maxime.coquelin@redhat.com, Wei Xu , jfreimann@redhat.com, weiyshay@gmail.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Wei Xu 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 Reviewed-by: Jens Freimann --- hw/virtio/virtio.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) 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;