From patchwork Sat Dec 17 10:43:30 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 9478947 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0A2BC60237 for ; Sat, 17 Dec 2016 10:55:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0A92528587 for ; Sat, 17 Dec 2016 10:55:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F382F2858A; Sat, 17 Dec 2016 10:55:55 +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=-6.9 required=2.0 tests=BAYES_00,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 A3FF028587 for ; Sat, 17 Dec 2016 10:55:55 +0000 (UTC) Received: from localhost ([::1]:36017 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cICef-0001el-75 for patchwork-qemu-devel@patchwork.kernel.org; Sat, 17 Dec 2016 05:55:53 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53366) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cICUg-0007qx-Ax for qemu-devel@nongnu.org; Sat, 17 Dec 2016 05:45:35 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cICUf-0008EC-CP for qemu-devel@nongnu.org; Sat, 17 Dec 2016 05:45:34 -0500 Received: from mga05.intel.com ([192.55.52.43]:21540) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cICUe-0007ss-Sf for qemu-devel@nongnu.org; Sat, 17 Dec 2016 05:45:33 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga105.fm.intel.com with ESMTP; 17 Dec 2016 02:45:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.33,363,1477983600"; d="scan'208"; a="1073174540" Received: from devel-ww.sh.intel.com ([10.239.48.105]) by orsmga001.jf.intel.com with ESMTP; 17 Dec 2016 02:45:30 -0800 From: Wei Wang To: marcandre.lureau@gmail.com, mst@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org Date: Sat, 17 Dec 2016 18:43:30 +0800 Message-Id: <1481971427-11094-21-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1481971427-11094-1-git-send-email-wei.w.wang@intel.com> References: <1481971427-11094-1-git-send-email-wei.w.wang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.43 Subject: [Qemu-devel] [PATCH v1 20/37] vhost-pci-slave/msg: VHOST_USER_SET_VRING_KICK 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: Wei Wang Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Update the kickfd to the head node in the list. This version of vhost-pci expects the driver to use polling to receive packets. So, other than storing the kickfd, we don't do anything more. Signed-off-by: Wei Wang --- hw/virtio/vhost-pci-slave.c | 19 +++++++++++++++++++ include/hw/virtio/vhost-pci-slave.h | 1 + 2 files changed, 20 insertions(+) diff --git a/hw/virtio/vhost-pci-slave.c b/hw/virtio/vhost-pci-slave.c index a55861a..dff1c88 100644 --- a/hw/virtio/vhost-pci-slave.c +++ b/hw/virtio/vhost-pci-slave.c @@ -11,6 +11,7 @@ */ #include +#include #include "qapi/error.h" #include "qemu/error-report.h" @@ -223,6 +224,13 @@ static void vp_slave_set_vring_addr(VhostUserMsg *msg) sizeof(struct vhost_vring_addr)); } +static void vp_slave_set_vring_kick(int fd) +{ + PeerVqNode *pvq_node = QLIST_FIRST(&vp_slave->pvq_list); + if (!pvq_node) + pvq_node->kickfd = fd; +} + static int vp_slave_can_read(void *opaque) { return VHOST_USER_HDR_SIZE; @@ -295,6 +303,17 @@ static void vp_slave_read(void *opaque, const uint8_t *buf, int size) case VHOST_USER_SET_VRING_ADDR: vp_slave_set_vring_addr(&msg); break; + case VHOST_USER_SET_VRING_KICK: + /* consume the fd */ + qemu_chr_fe_get_msgfds(chr_be, fds, 1); + vp_slave_set_vring_kick(fds[0]); + /* + * This is a non-blocking eventfd. + * The receive function forces it to be blocking, + * so revert it back to non-blocking. + */ + qemu_set_nonblock(fds[0]); + break; default: error_report("vhost-pci-slave does not support msg request = %d", msg.request); diff --git a/include/hw/virtio/vhost-pci-slave.h b/include/hw/virtio/vhost-pci-slave.h index 439198d..4b6b213 100644 --- a/include/hw/virtio/vhost-pci-slave.h +++ b/include/hw/virtio/vhost-pci-slave.h @@ -10,6 +10,7 @@ typedef struct PeerVqNode { uint16_t last_avail_idx; uint32_t vring_num; + int kickfd; struct vhost_vring_addr addr; QLIST_ENTRY(PeerVqNode) node; } PeerVqNode;