From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 63DADA09F6; Fri, 18 Dec 2020 09:02:40 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 8FF2DCA2C; Fri, 18 Dec 2020 09:02:38 +0100 (CET) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id 0CC20CA2A for ; Fri, 18 Dec 2020 09:02:36 +0100 (CET) IronPort-SDR: tD47kALKJj9h7bqog/8wFAnLlVOfy7u2aM0Mlo+xsyQIBllPj0akIDiSpM51LOWQ5z3/H+WQ+Q P7oTS/tJ+C1Q== X-IronPort-AV: E=McAfee;i="6000,8403,9838"; a="236970604" X-IronPort-AV: E=Sophos;i="5.78,429,1599548400"; d="scan'208";a="236970604" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2020 00:02:34 -0800 IronPort-SDR: GQxjJ1wJlTNUVak13Y2f85HYF3ssS0nZTEMdGAEKUEnHErWnLeladBKXfo5tvScT0v34/oMeji zYZwm2Ud8o4Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.78,429,1599548400"; d="scan'208";a="561095708" Received: from npg-dpdk-virtio-xiachenbo-nw.sh.intel.com ([10.67.119.123]) by fmsmga005.fm.intel.com with ESMTP; 18 Dec 2020 00:02:32 -0800 From: Chenbo Xia To: dev@dpdk.org, thomas@monjalon.net, david.marchand@redhat.com Cc: stephen@networkplumber.org, cunming.liang@intel.com, xiuchun.lu@intel.com, miao.li@intel.com, jingjing.wu@intel.com Date: Fri, 18 Dec 2020 15:47:28 +0800 Message-Id: <20201218074736.93999-1-chenbo.xia@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [dpdk-dev] [PATCH 0/8] Introduce emudev library and iavf emudev driver 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: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This series introduces a new device abstraction called emudev for emulated devices. A new library (librte_emudev) is implemented. The first emudev driver is also introduced, which emulates Intel Adaptive Virtual Function (iavf) as a software network device. This series has a dependency on librte_vfio_user patch series: http://patchwork.dpdk.org/cover/85389/ Background & Motivation ----------------------- The disaggregated/multi-process QEMU is using VFIO-over-socket/vfio-user as the main transport mechanism to disaggregate IO services from QEMU. Therefore, librte_vfio_user is introduced in DPDK to accommodate emulated devices for high performance I/O. Although vfio-user library provides possibility of emulating devices in DPDK, DPDK does not have a device abstraction for emulated devices. A good device abstraction will be useful for applications or high performance data path driver. With this consideration, emudev library is designed and implemented. It also make it possbile to keep modular design on emulated devices by implementing data path related logic in a standalone driver (e.g., an ethdev driver) and keeps the unrelated logic in the emudev driver. Design overview --------------- +---------------------------------------+ | +---------------+ +-----------+ | | | iavf_emudev |<-->| data path | | | | driver | | driver | | | +---------------+ +-----------+ | | | | | --------------------------- VDEV BUS | | | | | +---------------+ | +--------------+ | | vdev: | | | +----------+ | | | /path/to/vfio | | | | Generic | | | +---------------+ | | | vfio-dev | | | | | | +----------+ | | | | | +----------+ | | +----------+ | | | vfio-user| | | | vfio-user| | | | client | |<---|----->| server | | | +----------+ | | +----------+ | | QEMU/DPDK | | DPDK | +--------------+ +---------------------------------------+ - Generic vfio-dev/vfio-user client/vfio-user server Above concepts are all introduced in librte_vfio_user patch series: http://patchwork.dpdk.org/cover/85389/ - vdev:/path/to/vfio. It binds to vdev bus driver. The vdev device is defined by DPDK applications through command line as '--vdev=emu_iavf, path=/path/to/socket' in iavf_emudev case. Parameters in command line include device name (emu_iavf) which is used to identify corresponding driver (in this case, iavf_emudev driver), path=/path/to/socket which is used to open the transport interface to vfio-user client in QEMU/DPDK. - data path driver. The data path handling is splited to another standalone driver for modular design. Chenbo Xia (8): lib: introduce emudev library doc: add emudev library guide emu: introduce emulated iavf driver emu/iavf: add vfio-user device register and unregister emu/iavf: add resource management and internal logic of iavf emu/iavf: add emudev operations to fit in emudev framework test/emudev: introduce functional test doc: update release notes for iavf emudev driver MAINTAINERS | 12 + app/test/meson.build | 5 +- app/test/test_emudev.c | 29 + doc/guides/prog_guide/emudev.rst | 122 +++ doc/guides/prog_guide/index.rst | 1 + doc/guides/rel_notes/release_21_02.rst | 16 + drivers/emu/iavf/iavf_emu.c | 250 ++++++ drivers/emu/iavf/iavf_emu_internal.h | 69 ++ drivers/emu/iavf/iavf_emu_test.c | 174 ++++ drivers/emu/iavf/iavf_emudev.c | 237 ++++++ drivers/emu/iavf/iavf_vfio_user.c | 1053 ++++++++++++++++++++++++ drivers/emu/iavf/iavf_vfio_user.h | 57 ++ drivers/emu/iavf/meson.build | 17 + drivers/emu/iavf/rte_iavf_emu.h | 119 +++ drivers/emu/iavf/version.map | 3 + drivers/emu/meson.build | 6 + drivers/meson.build | 1 + lib/librte_emudev/meson.build | 5 + lib/librte_emudev/rte_emudev.c | 486 +++++++++++ lib/librte_emudev/rte_emudev.h | 410 +++++++++ lib/librte_emudev/rte_emudev_vdev.h | 53 ++ lib/librte_emudev/version.map | 27 + lib/meson.build | 2 +- 23 files changed, 3152 insertions(+), 2 deletions(-) create mode 100644 app/test/test_emudev.c create mode 100644 doc/guides/prog_guide/emudev.rst create mode 100644 drivers/emu/iavf/iavf_emu.c create mode 100644 drivers/emu/iavf/iavf_emu_internal.h create mode 100644 drivers/emu/iavf/iavf_emu_test.c create mode 100644 drivers/emu/iavf/iavf_emudev.c create mode 100644 drivers/emu/iavf/iavf_vfio_user.c create mode 100644 drivers/emu/iavf/iavf_vfio_user.h create mode 100644 drivers/emu/iavf/meson.build create mode 100644 drivers/emu/iavf/rte_iavf_emu.h create mode 100644 drivers/emu/iavf/version.map create mode 100644 drivers/emu/meson.build create mode 100644 lib/librte_emudev/meson.build create mode 100644 lib/librte_emudev/rte_emudev.c create mode 100644 lib/librte_emudev/rte_emudev.h create mode 100644 lib/librte_emudev/rte_emudev_vdev.h create mode 100644 lib/librte_emudev/version.map -- 2.17.1