From patchwork Wed Mar 18 09:35:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 451318 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org 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 ozlabs.org (Postfix) with ESMTPS id 37B3714008F for ; Wed, 18 Mar 2015 20:47:09 +1100 (AEDT) Received: from localhost ([::1]:60531 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYAZ9-0001zZ-GD for incoming@patchwork.ozlabs.org; Wed, 18 Mar 2015 05:47:07 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59543) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYAOR-0007PP-30 for qemu-devel@nongnu.org; Wed, 18 Mar 2015 05:36:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YYAOK-0005pm-Uq for qemu-devel@nongnu.org; Wed, 18 Mar 2015 05:36:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54365) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYAOK-0005pd-Q3 for qemu-devel@nongnu.org; Wed, 18 Mar 2015 05:35:56 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 71ECCAB127; Wed, 18 Mar 2015 09:35:56 +0000 (UTC) Received: from jason-ThinkPad-T430s.nay.redhat.com ([10.66.70.106]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t2I9ZBAM027132; Wed, 18 Mar 2015 05:35:54 -0400 From: Jason Wang To: qemu-devel@nongnu.org Date: Wed, 18 Mar 2015 17:35:05 +0800 Message-Id: <1426671309-13645-16-git-send-email-jasowang@redhat.com> In-Reply-To: <1426671309-13645-1-git-send-email-jasowang@redhat.com> References: <1426671309-13645-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: cornelia.huck@de.ibm.com, Jason Wang , mst@redhat.com Subject: [Qemu-devel] [PATCH V4 15/19] virtio: introduce virtio_queue_get_index() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This patch introduces a helper that can get the queue index of a VirtQueue. This is useful when traversing the list of VirtQueues. Cc: Michael S. Tsirkin Signed-off-by: Jason Wang --- hw/virtio/virtio.c | 5 +++++ include/hw/virtio/virtio.h | 1 + 2 files changed, 6 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index ca157e8..d4c49ef 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -725,6 +725,11 @@ hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n) return vdev->vq[n].pa; } +int virtio_queue_get_index(VirtIODevice *vdev, VirtQueue *vq) +{ + return vq - vdev->vq; +} + void virtio_queue_set_num(VirtIODevice *vdev, int n, int num) { /* Don't allow guest to flip queue between existent and diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index e3adb1d..f148590 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -171,6 +171,7 @@ void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data); void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data); void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n); +int virtio_queue_get_index(VirtIODevice *vdev, VirtQueue *vq); void virtio_queue_set_num(VirtIODevice *vdev, int n, int num); int virtio_queue_get_num(VirtIODevice *vdev, int n); void virtio_queue_set_align(VirtIODevice *vdev, int n, int align);