From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f41.google.com (mail-pa0-f41.google.com [209.85.220.41]) by dpdk.org (Postfix) with ESMTP id CB5C958C3 for ; Mon, 22 Feb 2016 09:18:17 +0100 (CET) Received: by mail-pa0-f41.google.com with SMTP id ho8so89732205pac.2 for ; Mon, 22 Feb 2016 00:18:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=igel-co-jp.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=P6swiGlH7wL/KUZfsKSbGi+6x/81phiibnSWmP7JuxQ=; b=hiP6zVyFNi33qYhxiLkZUt29pbyXhpsoy4605/RGEIVQ/a4wDIL3XNIhujVdBb31pK dJ+6/UggmYkgu5g2K4GDaL1rCAizLZOWZXrumsxtVfSGIaBO5inqYgp3CFLDKFjRglPQ +D1nSjInl64IMA/eEjc/Pr/GJbFjIWrPqx6ncdQucfU1rIqff4RLCyIiQvVXU8w/6018 Sht1mpUlhyTDYgycDlA/InI9/kFBF4NriPHW4hXrjCnwDVjn3aq6Eo1FSMILrk7qhlqW 0aAfm/U8MpxtDboX6gGpl5QH7NsgkQD7kkfbE1vCxaXeKczU9m4PzOCCzA51R8Jzg8MA HWhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=P6swiGlH7wL/KUZfsKSbGi+6x/81phiibnSWmP7JuxQ=; b=W5X2F5oE9GNpWCK44cxUr+WoFPXpHm2nQE8wjt0fpeVtafw7tH4y63vFxj5UqCd0M9 PuYTBzkEomk1NUj+EaAmV1oI8We2D87/8lrR/Rqm1J6Pg2DwqMoAxHD40x62iQJe4gAw xiP6wSmYYFZ4N8S5hEussv4c2dLM+hxLHHzewNc6GVb0PlgK4Rr/SA4rr+3w3cNwiAUs XwCjSMSRY0MOc6pOzWR82aqPhiNbwuovqXxk1XFV8uOrto6rVx3eDHOkWmIUM3XNSuEn 5TZAfxtYj+gzWLGmgnm1fEHQ8WmbcPWedlHETVNxheml497cECvWNQhB2yr84qN6yW+z ESmw== X-Gm-Message-State: AG10YORfQUeuwmbxZkwAPhMaR1xXBBInd3mxa9wrLyTY4gvrIbFEaW6xVkPNOvToUQob/Q== X-Received: by 10.66.145.105 with SMTP id st9mr36383380pab.32.1456129097225; Mon, 22 Feb 2016 00:18:17 -0800 (PST) Received: from localhost.localdomain (napt.igel.co.jp. [219.106.231.132]) by smtp.gmail.com with ESMTPSA id xg9sm34945136pac.9.2016.02.22.00.18.15 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 22 Feb 2016 00:18:16 -0800 (PST) From: Tetsuya Mukawa To: dev@dpdk.org Date: Mon, 22 Feb 2016 17:17:49 +0900 Message-Id: <1456129075-14909-1-git-send-email-mukawa@igel.co.jp> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1455075613-3605-3-git-send-email-mukawa@igel.co.jp> References: <1455075613-3605-3-git-send-email-mukawa@igel.co.jp> Subject: [dpdk-dev] [PATCH v3 0/6] Virtio-net PMD: QEMU QTest extension for container X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Feb 2016 08:18:18 -0000 The patches will work on below patch series. - [PATCH v2 0/5] virtio support for container [Changes] v3 changes: - Rebase on latest master. - remove "-qtest-virtio" option, then add "--range-virtaddr" and "--align-memsize" options. - Fix typos in qtest.c v2 changes: - Rebase on above patch seiries. - Rebase on master - Add "--qtest-virtio" EAL option. - Fixes in qtest.c - Fix error handling for the case qtest connection is closed. - Use eventfd for interrupt messaging. - Use linux header for PCI register definitions. - Fix qtest_raw_send/recv to handle error correctly. - Fix bit mask of PCI_CONFIG_ADDR. - Describe memory and ioport usage of qtest guest in qtest.c - Remove loop that is for finding PCI devices. [Abstraction] Normally, virtio-net PMD only works on VM, because there is no virtio-net device on host. This patches extend virtio-net PMD to be able to work on host as virtual PMD. But we didn't implement virtio-net device as a part of virtio-net PMD. To prepare virtio-net device for the PMD, start QEMU process with special QTest mode, then connect it from virtio-net PMD through unix domain socket. The PMD can connect to anywhere QEMU virtio-net device can. For example, the PMD can connects to vhost-net kernel module and vhost-user backend application. Similar to virtio-net PMD on QEMU, application memory that uses virtio-net PMD will be shared between vhost backend application. But vhost backend application memory will not be shared. Main target of this PMD is container like docker, rkt, lxc and etc. We can isolate related processes(virtio-net PMD process, QEMU and vhost-user backend process) by container. But, to communicate through unix domain socket, shared directory will be needed. [How to use] Please use QEMU-2.5.1, or above. (So far, QEMU-2.5.1 hasn't been released yet, so please checkout master from QEMU repository) - Compile Set "CONFIG_RTE_VIRTIO_VDEV_QTEST=y" in config/common_linux. Then compile it. - Start QEMU like below. $ qemu-system-x86_64 \ -machine pc-i440fx-1.4,accel=qtest \ -display none -qtest-log /dev/null \ -qtest unix:/tmp/socket,server \ -netdev type=tap,script=/etc/qemu-ifup,id=net0,queues=1 \ -device virtio-net-pci,netdev=net0,mq=on,disable-modern=false,addr=3 \ -chardev socket,id=chr1,path=/tmp/ivshmem,server \ -device ivshmem,size=1G,chardev=chr1,vectors=1,addr=4 - Start DPDK application like below $ testpmd -c f -n 1 -m 1024 --no-pci --single-file --qtest-virtio \ --vdev="eth_qtest_virtio0,qtest=/tmp/socket,ivshmem=/tmp/ivshmem"\ -- --disable-hw-vlan --txqflags=0xf00 -i (*1) Please Specify same memory size in QEMU and DPDK command line. (*2) Should use qemu-2.5.1, or above. (*3) QEMU process is needed per port. (*4) virtio-1.0 device are only supported. (*5) The vhost backends like vhost-net and vhost-user can be specified. (*6) In most cases, just using above command is enough, but you can also specify other QEMU virtio-net options. (*7) Only checked "pc-i440fx-1.4" machine, but may work with other machines. It depends on a machine has piix3 south bridge. If the machine doesn't have, virtio-net PMD cannot receive status changed interrupts. (*8) Should not add "--enable-kvm" to QEMU command line. [Detailed Description] - virtio-net device implementation The PMD uses QEMU virtio-net device. To do that, QEMU QTest functionality is used. QTest is a test framework of QEMU devices. It allows us to implement a device driver outside of QEMU. With QTest, we can implement DPDK application and virtio-net PMD as standalone process on host. When QEMU is invoked as QTest mode, any guest code will not run. To know more about QTest, see below. http://wiki.qemu.org/Features/QTest - probing devices QTest provides a unix domain socket. Through this socket, driver process can access to I/O port and memory of QEMU virtual machine. The PMD will send I/O port accesses to probe pci devices. If we can find virtio-net and ivshmem device, initialize the devices. Also, I/O port accesses of virtio-net PMD will be sent through socket, and virtio-net PMD can initialize vitio-net device on QEMU correctly. - ivshmem device to share memory To share memory that virtio-net PMD process uses, ivshmem device will be used. Because ivshmem device can only handle one file descriptor, shared memory should be consist of one file. To allocate such a memory, EAL has new option called "--single-file". Also, the hugepages should be mapped between "1 << 31" to "1 << 44". To map like above, EAL has one more new option called "-qtest-virtio". While initializing ivshmem device, we can set BAR(Base Address Register). It represents which memory QEMU vcpu can access to this shared memory. We will specify host virtual address of shared memory as this address. It is very useful because we don't need to apply patch to QEMU to calculate address offset. (For example, if virtio-net PMD process will allocate memory from shared memory, then specify the virtual address of it to virtio-net register, QEMU virtio-net device can understand it without calculating address offset.) Tetsuya Mukawa (6): virtio: Retrieve driver name from eth_dev vhost: Add a function to check virtio device type EAL: Add new EAL "--range-virtaddr" option EAL: Add a new "--align-memsize" option virtio: Add support for qtest virtio-net PMD docs: add release note for qtest virtio container support config/common_linuxapp | 1 + doc/guides/rel_notes/release_16_04.rst | 3 + drivers/net/virtio/Makefile | 4 + drivers/net/virtio/qtest.c | 1342 ++++++++++++++++++++++++++++ drivers/net/virtio/qtest.h | 65 ++ drivers/net/virtio/virtio_ethdev.c | 433 ++++++++- drivers/net/virtio/virtio_ethdev.h | 32 + drivers/net/virtio/virtio_pci.c | 364 +++++++- drivers/net/virtio/virtio_pci.h | 5 +- lib/librte_eal/common/eal_common_options.c | 17 + lib/librte_eal/common/eal_internal_cfg.h | 3 + lib/librte_eal/common/eal_options.h | 4 + lib/librte_eal/linuxapp/eal/eal.c | 43 + lib/librte_eal/linuxapp/eal/eal_memory.c | 91 +- 14 files changed, 2338 insertions(+), 69 deletions(-) create mode 100644 drivers/net/virtio/qtest.c create mode 100644 drivers/net/virtio/qtest.h -- 2.1.4