From patchwork Tue Dec 5 03:33:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 10092045 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 011E560348 for ; Tue, 5 Dec 2017 03:53:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E884D2879C for ; Tue, 5 Dec 2017 03:53:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DBF8C29453; Tue, 5 Dec 2017 03:53:42 +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 2B87C2879C for ; Tue, 5 Dec 2017 03:53:42 +0000 (UTC) Received: from localhost ([::1]:46266 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM4If-0005oy-7Q for patchwork-qemu-devel@patchwork.kernel.org; Mon, 04 Dec 2017 22:53:41 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33230) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eM4Ep-0001NY-QR for qemu-devel@nongnu.org; Mon, 04 Dec 2017 22:49:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eM4Eo-0007LT-HS for qemu-devel@nongnu.org; Mon, 04 Dec 2017 22:49:43 -0500 Received: from mga01.intel.com ([192.55.52.88]:32277) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eM4Eo-0007JF-4v for qemu-devel@nongnu.org; Mon, 04 Dec 2017 22:49:42 -0500 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Dec 2017 19:49:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,362,1508828400"; d="scan'208";a="9615345" Received: from devel-ww.sh.intel.com ([10.239.48.110]) by orsmga003.jf.intel.com with ESMTP; 04 Dec 2017 19:49:39 -0800 From: Wei Wang To: virtio-dev@lists.oasis-open.org, qemu-devel@nongnu.org, mst@redhat.com, marcandre.lureau@redhat.com, jasowang@redhat.com, stefanha@redhat.com, pbonzini@redhat.com Date: Tue, 5 Dec 2017 11:33:11 +0800 Message-Id: <1512444796-30615-3-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1512444796-30615-1-git-send-email-wei.w.wang@intel.com> References: <1512444796-30615-1-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: 192.55.52.88 Subject: [Qemu-devel] [PATCH v3 2/7] vhost-pci-net: add vhost-pci-net 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: zhiyong.yang@intel.com, jan.kiszka@siemens.com, Wei Wang , avi.cohen@huawei.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add the vhost-pci-net device emulation. The device uses bar 2 to expose the remote VM's memory to the guest. The first 4KB of the the bar area stores the metadata which describes the remote memory and vring info. Signed-off-by: Wei Wang --- hw/net/Makefile.objs | 2 +- hw/net/vhost_pci_net.c | 106 +++++++++++++++++++++++++ include/hw/virtio/vhost-pci-net.h | 37 +++++++++ include/standard-headers/linux/vhost_pci_net.h | 60 ++++++++++++++ include/standard-headers/linux/virtio_ids.h | 1 + 5 files changed, 205 insertions(+), 1 deletion(-) create mode 100644 hw/net/vhost_pci_net.c create mode 100644 include/hw/virtio/vhost-pci-net.h create mode 100644 include/standard-headers/linux/vhost_pci_net.h diff --git a/hw/net/Makefile.objs b/hw/net/Makefile.objs index 4171af0..8b392fb 100644 --- a/hw/net/Makefile.objs +++ b/hw/net/Makefile.objs @@ -36,7 +36,7 @@ obj-$(CONFIG_MILKYMIST) += milkymist-minimac2.o obj-$(CONFIG_PSERIES) += spapr_llan.o obj-$(CONFIG_XILINX_ETHLITE) += xilinx_ethlite.o -obj-$(CONFIG_VIRTIO) += virtio-net.o +obj-$(CONFIG_VIRTIO) += virtio-net.o vhost_pci_net.o obj-y += vhost_net.o obj-$(CONFIG_ETSEC) += fsl_etsec/etsec.o fsl_etsec/registers.o \ diff --git a/hw/net/vhost_pci_net.c b/hw/net/vhost_pci_net.c new file mode 100644 index 0000000..db8f954 --- /dev/null +++ b/hw/net/vhost_pci_net.c @@ -0,0 +1,106 @@ +/* + * vhost-pci-net support + * + * Copyright Intel, Inc. 2017 + * + * Authors: + * Wei Wang + * Zhiyong Yang + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + * Contributions after 2012-01-13 are licensed under the terms of the + * GNU GPL, version 2 or (at your option) any later version. + */ + +#include "qemu/osdep.h" +#include "qemu/iov.h" +#include "qemu/error-report.h" +#include "hw/pci/pci.h" +#include "hw/virtio/virtio-access.h" +#include "hw/virtio/vhost-pci-net.h" +#include "hw/virtio/virtio-net.h" + +static uint64_t vpnet_get_features(VirtIODevice *vdev, uint64_t features, + Error **errp) +{ + VhostPCINet *vpnet = VHOST_PCI_NET(vdev); + features |= vpnet->host_features; + + return features; +} + +static void vpnet_get_config(VirtIODevice *vdev, uint8_t *config) +{ + VhostPCINet *vpnet = VHOST_PCI_NET(vdev); + struct vpnet_config netcfg; + + virtio_stw_p(vdev, &netcfg.status, vpnet->status); + memcpy(config, &netcfg, vpnet->config_size); +} + +static void vpnet_device_realize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VhostPCINet *vpnet = VHOST_PCI_NET(vdev); + + virtio_init(vdev, "vhost-pci-net", VIRTIO_ID_VHOST_PCI_NET, + vpnet->config_size); + + memory_region_init_ram(&vpnet->metadata_region, NULL, + "Metadata", METADATA_SIZE, NULL); + memory_region_add_subregion(&vpnet->bar_region, 0, + &vpnet->metadata_region); + vpnet->metadata = memory_region_get_ram_ptr(&vpnet->metadata_region); + memset(vpnet->metadata, 0, METADATA_SIZE); +} + +static void vpnet_device_unrealize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + + virtio_cleanup(vdev); +} + +static Property vpnet_properties[] = { + DEFINE_PROP_BIT("mrg_rxbuf", VhostPCINet, host_features, + VIRTIO_NET_F_MRG_RXBUF, true), + DEFINE_PROP_CHR("chardev", VhostPCINet, chr_be), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vpnet_instance_init(Object *obj) +{ + VhostPCINet *vpnet = VHOST_PCI_NET(obj); + + vpnet->config_size = sizeof(struct vpnet_config); +} + +static void vpnet_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + + dc->props = vpnet_properties; + set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); + vdc->realize = vpnet_device_realize; + vdc->unrealize = vpnet_device_unrealize; + vdc->get_config = vpnet_get_config; + vdc->get_features = vpnet_get_features; +} + +static const TypeInfo vpnet_info = { + .name = TYPE_VHOST_PCI_NET, + .parent = TYPE_VIRTIO_DEVICE, + .instance_size = sizeof(VhostPCINet), + .instance_init = vpnet_instance_init, + .class_init = vpnet_class_init, +}; + +static void virtio_register_types(void) +{ + type_register_static(&vpnet_info); +} + +type_init(virtio_register_types) diff --git a/include/hw/virtio/vhost-pci-net.h b/include/hw/virtio/vhost-pci-net.h new file mode 100644 index 0000000..0c6886d --- /dev/null +++ b/include/hw/virtio/vhost-pci-net.h @@ -0,0 +1,37 @@ +/* + * Virtio Network Device + * + * Copyright Intel, Corp. 2017 + * + * Authors: + * Wei Wang + * Zhiyong Yang + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#ifndef _QEMU_VHOST_PCI_NET_H +#define _QEMU_VHOST_PCI_NET_H + +#include "standard-headers/linux/vhost_pci_net.h" +#include "hw/virtio/virtio.h" +#include "chardev/char-fe.h" + +#define TYPE_VHOST_PCI_NET "vhost-pci-net-device" +#define VHOST_PCI_NET(obj) \ + OBJECT_CHECK(VhostPCINet, (obj), TYPE_VHOST_PCI_NET) + +typedef struct VhostPCINet { + VirtIODevice parent_obj; + MemoryRegion bar_region; + MemoryRegion metadata_region; + struct vpnet_metadata *metadata; + uint32_t host_features; + size_t config_size; + uint16_t status; + CharBackend chr_be; +} VhostPCINet; + +#endif diff --git a/include/standard-headers/linux/vhost_pci_net.h b/include/standard-headers/linux/vhost_pci_net.h new file mode 100644 index 0000000..cfb2413 --- /dev/null +++ b/include/standard-headers/linux/vhost_pci_net.h @@ -0,0 +1,60 @@ +#ifndef _LINUX_VHOST_PCI_NET_H +#define _LINUX_VHOST_PCI_NET_H + +/* This header is BSD licensed so anyone can use the definitions to implement + * compatible drivers/servers. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Intel nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL Intel OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. */ + +#include "standard-headers/linux/virtio_ids.h" + +#define METADATA_SIZE 4096 +#define MAX_REMOTE_REGION 8 + +struct vpnet_config { + uint16_t status; +}; + +struct vpnet_remote_mem { + uint64_t gpa; + uint64_t size; +}; + +struct vpnet_remote_vq { + uint16_t last_avail_idx; + int32_t vring_enabled; + uint32_t vring_num; + uint64_t desc_gpa; + uint64_t avail_gpa; + uint64_t used_gpa; +}; + +struct vpnet_metadata { + uint32_t nregions; + uint32_t nvqs; + struct vpnet_remote_mem mem[MAX_REMOTE_REGION]; + struct vpnet_remote_vq vq[0]; +}; + +#endif diff --git a/include/standard-headers/linux/virtio_ids.h b/include/standard-headers/linux/virtio_ids.h index 6d5c3b2..333bbd1 100644 --- a/include/standard-headers/linux/virtio_ids.h +++ b/include/standard-headers/linux/virtio_ids.h @@ -43,5 +43,6 @@ #define VIRTIO_ID_INPUT 18 /* virtio input */ #define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */ #define VIRTIO_ID_CRYPTO 20 /* virtio crypto */ +#define VIRTIO_ID_VHOST_PCI_NET 21 /* vhost-pci-net */ #endif /* _LINUX_VIRTIO_IDS_H */