From patchwork Fri May 29 06:15:26 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 477587 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 8CFE614012C for ; Fri, 29 May 2015 16:20:09 +1000 (AEST) Received: from localhost ([::1]:33775 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YyDeJ-0005nw-Ep for incoming@patchwork.ozlabs.org; Fri, 29 May 2015 02:20:07 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50839) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YyDaA-0005eL-2T for qemu-devel@nongnu.org; Fri, 29 May 2015 02:15:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YyDa9-0004Ot-9J for qemu-devel@nongnu.org; Fri, 29 May 2015 02:15:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45127) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YyDa9-0004Op-4J for qemu-devel@nongnu.org; Fri, 29 May 2015 02:15:49 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id D1A5D2E241F; Fri, 29 May 2015 06:15:48 +0000 (UTC) Received: from jason-ThinkPad-T430s.redhat.com (vpn1-6-113.pek2.redhat.com [10.72.6.113]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t4T6Fbwj019734; Fri, 29 May 2015 02:15:47 -0400 From: Jason Wang To: qemu-devel@nongnu.org Date: Fri, 29 May 2015 14:15:26 +0800 Message-Id: <1432880132-28477-4-git-send-email-jasowang@redhat.com> In-Reply-To: <1432880132-28477-1-git-send-email-jasowang@redhat.com> References: <1432880132-28477-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 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 V8 3/9] virtio: introduce virtio_get_num_queues() 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 virtio_get_num_queues() which iterates the vqs array and return the number of virtqueues used by device. Signed-off-by: Jason Wang --- hw/virtio/virtio.c | 13 +++++++++++++ include/hw/virtio/virtio.h | 1 + 2 files changed, 14 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 0b50f9d..81d8905 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -746,6 +746,19 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n) return vdev->vq[n].vring.num; } +int virtio_get_num_queues(VirtIODevice *vdev) +{ + int i; + + for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) { + if (!virtio_queue_get_num(vdev, i)) { + break; + } + } + + return i; +} + int virtio_queue_get_id(VirtQueue *vq) { VirtIODevice *vdev = vq->vdev; diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 8210cb3..175195d 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -175,6 +175,7 @@ void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n); void virtio_queue_set_num(VirtIODevice *vdev, int n, int num); int virtio_queue_get_num(VirtIODevice *vdev, int n); +int virtio_get_num_queues(VirtIODevice *vdev); void virtio_queue_set_align(VirtIODevice *vdev, int n, int align); void virtio_queue_notify(VirtIODevice *vdev, int n); uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);