From patchwork Thu Oct 11 14:08:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Xu X-Patchwork-Id: 10636683 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 517D4112B for ; Thu, 11 Oct 2018 14:14:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 446BA2B7D8 for ; Thu, 11 Oct 2018 14:14:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 380242B7DC; Thu, 11 Oct 2018 14:14:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E1B092B7D8 for ; Thu, 11 Oct 2018 14:14:19 +0000 (UTC) Received: from localhost ([::1]:34707 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gAbjH-0000Yn-44 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 11 Oct 2018 10:14:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39261) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gAbeJ-0004mI-D0 for qemu-devel@nongnu.org; Thu, 11 Oct 2018 10:09:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gAbeD-0005nF-Ki for qemu-devel@nongnu.org; Thu, 11 Oct 2018 10:09:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46284) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gAbeD-0005mE-El for qemu-devel@nongnu.org; Thu, 11 Oct 2018 10:09:05 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B9FCB3083395; Thu, 11 Oct 2018 14:09:04 +0000 (UTC) Received: from dell-per430-12.lab.eng.pek2.redhat.com (dell-per430-12.lab.eng.pek2.redhat.com [10.73.196.55]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8BD115D6A9; Thu, 11 Oct 2018 14:09:02 +0000 (UTC) From: wexu@redhat.com To: qemu-devel@nongnu.org Date: Thu, 11 Oct 2018 10:08:25 -0400 Message-Id: <1539266915-15216-3-git-send-email-wexu@redhat.com> In-Reply-To: <1539266915-15216-1-git-send-email-wexu@redhat.com> References: <1539266915-15216-1-git-send-email-wexu@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Thu, 11 Oct 2018 14:09:04 +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] [[RFC v3 02/12] virtio: redefine structure & memory cache for packed ring X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maxime.coquelin@redhat.com, jasowang@redhat.com, jfreimann@redhat.com, wexu@redhat.com, tiwei.bie@intel.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Wei Xu Redefine packed ring structure according to qemu nomenclature, also supported data(event index, wrap counter, etc) are introduced. Signed-off-by: Wei Xu --- hw/virtio/virtio.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 94f5c8e..500eecf 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; @@ -62,8 +69,14 @@ typedef struct VRingUsed typedef struct VRingMemoryRegionCaches { struct rcu_head rcu; MemoryRegionCache desc; - MemoryRegionCache avail; - MemoryRegionCache used; + union { + MemoryRegionCache avail; + MemoryRegionCache driver; + }; + union { + MemoryRegionCache used; + MemoryRegionCache device; + }; } VRingMemoryRegionCaches; typedef struct VRing @@ -77,6 +90,11 @@ typedef struct VRing VRingMemoryRegionCaches *caches; } VRing; +typedef struct VRingPackedDescEvent { + uint16_t off_wrap; + uint16_t flags; +} VRingPackedDescEvent ; + struct VirtQueue { VRing vring; @@ -87,6 +105,10 @@ struct VirtQueue /* Last avail_idx read from VQ. */ uint16_t shadow_avail_idx; + uint16_t event_idx; + bool event_wrap_counter; + bool avail_wrap_counter; + uint16_t used_idx; /* Last used index value we have signalled on */