From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 8BBEA28EE for ; Thu, 30 Nov 2017 10:47:20 +0100 (CET) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Nov 2017 01:47:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,341,1508828400"; d="scan'208";a="1250236711" Received: from unknown (HELO dpdk5.bj.intel.com) ([172.16.182.182]) by fmsmga002.fm.intel.com with ESMTP; 30 Nov 2017 01:47:17 -0800 From: Zhiyong Yang To: dev@dpdk.org, yliu@fridaylinux.org, maxime.coquelin@redhat.com Cc: wei.w.wang@intel.com, jianfeng.tan@intel.com Date: Thu, 30 Nov 2017 17:46:46 +0800 Message-Id: <20171130094657.11470-1-zhiyong.yang@intel.com> X-Mailer: git-send-email 2.13.3 Subject: [dpdk-dev] [PATCH 00/11] net/vhostpci: A new vhostpci PMD supporting VM2VM scenario X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Nov 2017 09:47:21 -0000 Vhostpci PMD is a new type driver working in guest OS which has ability to drive the vhostpci modern pci device, which is a new virtio device. The following linking is about vhostpci design: An initial device design is presented at KVM Forum'16: http://www.linux-kvm.org/images/5/55/02x07A-Wei_Wang-Design_of-Vhost-pci.pdf The latest device design and implementation will be posted to the QEMU community soon. Vhostpci PMD works in pair with virtio-net PMD to achieve point-to-point communication between VMs. DPDK already has virtio/vhost user PMD pair to implement RX/TX packets between guest/host scenario. However, for VM2VM use cases, Virtio PMD needs to transmit pkts from VM1 to host OS firstly by vhost user port, then transmit pkts to the 2nd VM by virtio PMD port again. Virtio/Vhostpci PMD pair can implement shared memory to receive/trasmit packets directly between two VMs. Currently, the entire memory of the virtio-net side VM is shared to the vhost-pci side VM, and mapped via device BAR2, and the first 4KB area of BAR2 is reserved to store the metadata. The vhostpci/virtio PMD working processing is the following: 1.VM1 startup with vhostpci device, bind the device to DPDK in the guest1, launch the DPDK testpmd, then waiting for the remote memory info (the VM2 shares memory, memory regions and vring info). 2.VM2 startup with virtio-net device, bind the virito-net to DPDK in the VM2, run testpmd using virtio PMD. 3.vhostpci device negotiate virtio message with virtio-net device via socket as vhost user/virtio-net do that. 4.Vhostpci device gets VM2's memory region and vring info and write the metadata to VM2's shared memory. 5.When the metadata is ready to be read by the Vhostpci PMD, the PMD will receive a config interrupt with LINK_UP set in the status config. 6.Vhostpci PMD and Virtio PMD can transmit/receive the packets. How to test? 1. launch VM1 with vhostpci device. qemu/x86_64-softmmu/qemu-system-x86_64 -cpu host -M pc -enable-kvm \ -smp 16,threads=1,sockets=1 -m 8G -mem-prealloc -realtime mlock=on \ -object memory-backend-file,id=mem,size=8G,mem-path=/dev/hugepages, \ share=on -numa node,memdev=mem -drive if=virtio,file=/root/vhost-pci/guest1.img,format=raw \ -kernel /opt/guest_kernel -append 'root=/dev/vda1 ro default_hugepagesz=1G hugepagesz=1G \ hugepages=2 console=ttyS0,115200,8n1 3' -netdev tap,id=net1,br=br0,script=/etc/qemu-ifup \ -chardev socket,id=slave1,server,wait=off, path=/opt/vhost-pci-slave1 -device vhost-pci-net-pci, \ chardev=slave1 \ -nographic 2. bind vhostpci device to dpdk using igb_uio. startup dpdk ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x3 -n 4 -- -i 3. launch VM2 with virtio-net device. qemu/x86_64-softmmu/qemu-system-x86_64 -cpu host -M pc -enable-kvm \ -smp 4,threads=1,sockets=1 -m 8G -mem-prealloc -realtime mlock=on \ -object memory-backend-file,id=mem,size=8G,mem-path=/dev/hugepages,share=on \ -numa node,memdev=mem -drive if=virtio,file=/root/vhost-pci/guest2.img,format=raw \ -net none -no-hpet -kernel /opt/guest_kernel \ -append 'root=/dev/vda1 ro default_hugepagesz=1G hugepagesz=1G hugepages=2 console=ttyS0,115200,8n1 3' \ -chardev socket,id=sock2,path=/opt/vhost-pci-slave1 \ -netdev type=vhost-user,id=net2,chardev=sock2,vhostforce \ -device virtio-net-pci,mac=52:54:00:00:00:02,netdev=net2 \ -nographic 4.bind virtio-net to dpdk using igb_uio run dpdk ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x3 -n 4 --socket-mem 512,0 \ -- -i --rxq=1 --txq=1 --nb-cores=1 5. vhostpci PMD run "start" 6. virtio PMD side run "start tx_first" loopback testing can work. note: 1. only support igb_uio for now. 2. vhostpci device is a modern pci device. vhostpci PMD only supports mergable mode. Virtio device side must be mergable mode. 3. vhostpci PMD supports one queue pair for now. Zhiyong Yang (11): drivers/net: add vhostpci PMD base files net/vhostpci: public header files net/vhostpci: add debugging log macros net/vhostpci: add basic framework net/vhostpci: add queue setup net/vhostpci: add support for link status change net/vhostpci: get remote memory region and vring info net/vhostpci: add RX function net/vhostpci: add TX function net/vhostpci: support RX/TX packets statistics net/vhostpci: update release note MAINTAINERS | 6 + config/common_base | 9 + config/common_linuxapp | 1 + doc/guides/rel_notes/release_18_02.rst | 6 + drivers/net/Makefile | 1 + drivers/net/vhostpci/Makefile | 54 + drivers/net/vhostpci/rte_pmd_vhostpci_version.map | 3 + drivers/net/vhostpci/vhostpci_ethdev.c | 1521 +++++++++++++++++++++ drivers/net/vhostpci/vhostpci_ethdev.h | 176 +++ drivers/net/vhostpci/vhostpci_logs.h | 69 + drivers/net/vhostpci/vhostpci_net.h | 74 + drivers/net/vhostpci/vhostpci_pci.c | 334 +++++ drivers/net/vhostpci/vhostpci_pci.h | 240 ++++ mk/rte.app.mk | 1 + 14 files changed, 2495 insertions(+) create mode 100644 drivers/net/vhostpci/Makefile create mode 100644 drivers/net/vhostpci/rte_pmd_vhostpci_version.map create mode 100644 drivers/net/vhostpci/vhostpci_ethdev.c create mode 100644 drivers/net/vhostpci/vhostpci_ethdev.h create mode 100644 drivers/net/vhostpci/vhostpci_logs.h create mode 100644 drivers/net/vhostpci/vhostpci_net.h create mode 100644 drivers/net/vhostpci/vhostpci_pci.c create mode 100644 drivers/net/vhostpci/vhostpci_pci.h -- 2.13.3