From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38281) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTOfP-0006Tg-SY for qemu-devel@nongnu.org; Thu, 05 Mar 2015 00:49:52 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YTOfJ-00023S-OC for qemu-devel@nongnu.org; Thu, 05 Mar 2015 00:49:51 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33545) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTOfJ-00023J-Hu for qemu-devel@nongnu.org; Thu, 05 Mar 2015 00:49:45 -0500 From: Jason Wang Date: Thu, 5 Mar 2015 13:48:47 +0800 Message-Id: <1425534531-6305-11-git-send-email-jasowang@redhat.com> In-Reply-To: <1425534531-6305-1-git-send-email-jasowang@redhat.com> References: <1425534531-6305-1-git-send-email-jasowang@redhat.com> Subject: [Qemu-devel] [PATCH V3 10/14] virtio: introduce virtio_queue_get_index() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Jason Wang , Anthony Liguori , "Michael S. Tsirkin" This patch introduces a helper that can get the queue index of a VirtQueue. This is useful when traversing the list of VirtQueues. Cc: Anthony Liguori 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 5e6b879..bd32518 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 ceab8e8..37aa9c4 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -217,6 +217,7 @@ 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); -- 2.1.0