net/af_xdp: introduce AF_XDP PMD
Add a new PMD driver for AF_XDP which is a proposed faster version of AF_PACKET interface in Linux. More info about AF_XDP, please refer to [1] [2]. This is the vanilla version PMD which just uses a raw buffer registered as the umem. [1] https://fosdem.org/2018/schedule/event/af_xdp/ [2] https://lwn.net/Articles/745934/ Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com> Acked-by: Luca Boccassi <bluca@debian.org> Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Xiaolong Ye
Ferruh Yigit
parent
684b9a1b1f
commit
f1debd77ef
@ -497,6 +497,13 @@ M: John W. Linville <linville@tuxdriver.com>
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F: drivers/net/af_packet/
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F: doc/guides/nics/features/afpacket.ini
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Linux AF_XDP
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M: Xiaolong Ye <xiaolong.ye@intel.com>
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M: Qi Zhang <qi.z.zhang@intel.com>
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F: drivers/net/af_xdp/
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F: doc/guides/nics/af_xdp.rst
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F: doc/guides/nics/features/af_xdp.ini
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Amazon ENA
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M: Marcin Wojtas <mw@semihalf.com>
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M: Michal Krawczyk <mk@semihalf.com>
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@ -430,6 +430,11 @@ CONFIG_RTE_LIBRTE_VMXNET3_DEBUG_TX_FREE=n
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#
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CONFIG_RTE_LIBRTE_PMD_AF_PACKET=n
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#
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# Compile software PMD backed by AF_XDP sockets (Linux only)
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#
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CONFIG_RTE_LIBRTE_PMD_AF_XDP=n
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#
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# Compile link bonding PMD library
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#
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50
doc/guides/nics/af_xdp.rst
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50
doc/guides/nics/af_xdp.rst
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@ -0,0 +1,50 @@
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.. SPDX-License-Identifier: BSD-3-Clause
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Copyright(c) 2019 Intel Corporation.
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AF_XDP Poll Mode Driver
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==========================
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AF_XDP is an address family that is optimized for high performance
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packet processing. AF_XDP sockets enable the possibility for XDP program to
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redirect packets to a memory buffer in userspace.
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For the full details behind AF_XDP socket, you can refer to
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`AF_XDP documentation in the Kernel
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<https://www.kernel.org/doc/Documentation/networking/af_xdp.rst>`_.
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This Linux-specific PMD driver creates the AF_XDP socket and binds it to a
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specific netdev queue, it allows a DPDK application to send and receive raw
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packets through the socket which would bypass the kernel network stack.
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Current implementation only supports single queue, multi-queues feature will
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be added later.
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Note that MTU of AF_XDP PMD is limited due to XDP lacks support for
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fragmentation.
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Options
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-------
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The following options can be provided to set up an af_xdp port in DPDK.
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* ``iface`` - name of the Kernel interface to attach to (required);
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* ``queue`` - netdev queue id (optional, default 0);
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Prerequisites
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-------------
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This is a Linux-specific PMD, thus the following prerequisites apply:
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* A Linux Kernel (version > v4.18) with XDP sockets configuration enabled;
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* libbpf (within kernel version > v5.1-rc4) with latest af_xdp support installed,
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User can install libbpf via `make install_lib` && `make install_headers` in
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<kernel src tree>/tools/lib/bpf;
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* A Kernel bound interface to attach to;
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Set up an af_xdp interface
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-----------------------------
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The following example will set up an af_xdp interface in DPDK:
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.. code-block:: console
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--vdev net_af_xdp,iface=ens786f1,queue=0
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11
doc/guides/nics/features/af_xdp.ini
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11
doc/guides/nics/features/af_xdp.ini
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@ -0,0 +1,11 @@
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;
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; Supported features of the 'af_xdp' network poll mode driver.
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;
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; Refer to default.ini for the full list of available PMD features.
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;
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[Features]
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Link status = Y
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MTU update = Y
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Promiscuous mode = Y
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Stats per queue = Y
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x86-64 = Y
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@ -12,6 +12,7 @@ Network Interface Controller Drivers
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features
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build_and_test
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af_packet
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af_xdp
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ark
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atlantic
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avp
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@ -77,6 +77,13 @@ New Features
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the given mb-pool. This provide the ability to pass jumbo frames
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if the mb-pool contains suitable buffers' size.
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* **Added the AF_XDP PMD.**
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Added a Linux-specific PMD driver for AF_XDP, it can create the AF_XDP socket
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and bind it to a specific netdev queue, it allows a DPDK application to send
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and receive raw packets through the socket which would bypass the kernel
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network stack to achieve high performance packet processing.
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* **Updated Solarflare network PMD.**
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Updated the sfc_efx driver including the following changes:
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@ -9,6 +9,7 @@ ifeq ($(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD),d)
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endif
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DIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += af_packet
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DIRS-$(CONFIG_RTE_LIBRTE_PMD_AF_XDP) += af_xdp
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DIRS-$(CONFIG_RTE_LIBRTE_ARK_PMD) += ark
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DIRS-$(CONFIG_RTE_LIBRTE_ATLANTIC_PMD) += atlantic
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DIRS-$(CONFIG_RTE_LIBRTE_AVP_PMD) += avp
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28
drivers/net/af_xdp/Makefile
Normal file
28
drivers/net/af_xdp/Makefile
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@ -0,0 +1,28 @@
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# SPDX-License-Identifier: BSD-3-Clause
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# Copyright(c) 2019 Intel Corporation
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include $(RTE_SDK)/mk/rte.vars.mk
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#
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# library name
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#
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LIB = librte_pmd_af_xdp.a
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EXPORT_MAP := rte_pmd_af_xdp_version.map
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LIBABIVER := 1
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CFLAGS += -O3
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CFLAGS += $(WERROR_FLAGS)
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LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool -lrte_ring
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LDLIBS += -lrte_ethdev -lrte_net -lrte_kvargs
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LDLIBS += -lrte_bus_vdev
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LDLIBS += $(shell command -v pkg-config > /dev/null 2>&1 && pkg-config --libs libbpf || echo "-lbpf")
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#
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# all source are stored in SRCS-y
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#
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SRCS-$(CONFIG_RTE_LIBRTE_PMD_AF_XDP) += rte_eth_af_xdp.c
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include $(RTE_SDK)/mk/rte.lib.mk
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15
drivers/net/af_xdp/af_xdp_deps.h
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15
drivers/net/af_xdp/af_xdp_deps.h
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@ -0,0 +1,15 @@
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2019 Intel Corporation.
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*/
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#ifndef AF_XDP_DEPS_H_
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#define AF_XDP_DEPS_H_
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#include <rte_atomic.h>
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#include <rte_branch_prediction.h>
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/* This is to fix the xsk.h's dependency on asm/barrier.h */
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#define smp_rmb() rte_rmb()
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#define smp_wmb() rte_wmb()
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#endif /* AF_XDP_DEPS_H_ */
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16
drivers/net/af_xdp/meson.build
Normal file
16
drivers/net/af_xdp/meson.build
Normal file
@ -0,0 +1,16 @@
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# SPDX-License-Identifier: BSD-3-Clause
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# Copyright(c) 2019 Intel Corporation
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sources = files('rte_eth_af_xdp.c')
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bpf_dep = dependency('libbpf', required: false)
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if not bpf_dep.found()
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bpf_dep = cc.find_library('bpf', required: false)
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endif
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if bpf_dep.found() and cc.has_header('bpf/xsk.h') and cc.has_header('linux/if_xdp.h')
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ext_deps += bpf_dep
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pkgconfig_extra_libs += '-lbpf'
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else
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build = false
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endif
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955
drivers/net/af_xdp/rte_eth_af_xdp.c
Normal file
955
drivers/net/af_xdp/rte_eth_af_xdp.c
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@ -0,0 +1,955 @@
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2019 Intel Corporation.
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <linux/if_ether.h>
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#include <linux/if_xdp.h>
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#include <linux/if_link.h>
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#include "af_xdp_deps.h"
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#include <bpf/xsk.h>
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#include <rte_ethdev.h>
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#include <rte_ethdev_driver.h>
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#include <rte_ethdev_vdev.h>
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#include <rte_kvargs.h>
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#include <rte_bus_vdev.h>
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#include <rte_string_fns.h>
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#include <rte_branch_prediction.h>
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#include <rte_common.h>
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#include <rte_config.h>
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#include <rte_dev.h>
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#include <rte_eal.h>
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#include <rte_ether.h>
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#include <rte_lcore.h>
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#include <rte_log.h>
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#include <rte_memory.h>
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#include <rte_memzone.h>
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#include <rte_mbuf.h>
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#include <rte_malloc.h>
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#include <rte_ring.h>
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#ifndef SOL_XDP
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#define SOL_XDP 283
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#endif
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#ifndef AF_XDP
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#define AF_XDP 44
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#endif
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#ifndef PF_XDP
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#define PF_XDP AF_XDP
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#endif
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static int af_xdp_logtype;
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#define AF_XDP_LOG(level, fmt, args...) \
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rte_log(RTE_LOG_ ## level, af_xdp_logtype, \
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"%s(): " fmt, __func__, ##args)
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#define ETH_AF_XDP_FRAME_SIZE XSK_UMEM__DEFAULT_FRAME_SIZE
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#define ETH_AF_XDP_NUM_BUFFERS 4096
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#define ETH_AF_XDP_DATA_HEADROOM 0
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#define ETH_AF_XDP_DFLT_NUM_DESCS XSK_RING_CONS__DEFAULT_NUM_DESCS
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#define ETH_AF_XDP_DFLT_QUEUE_IDX 0
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#define ETH_AF_XDP_RX_BATCH_SIZE 32
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#define ETH_AF_XDP_TX_BATCH_SIZE 32
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#define ETH_AF_XDP_MAX_QUEUE_PAIRS 16
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struct xsk_umem_info {
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struct xsk_ring_prod fq;
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struct xsk_ring_cons cq;
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struct xsk_umem *umem;
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struct rte_ring *buf_ring;
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const struct rte_memzone *mz;
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};
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struct rx_stats {
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uint64_t rx_pkts;
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uint64_t rx_bytes;
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uint64_t rx_dropped;
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};
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struct pkt_rx_queue {
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struct xsk_ring_cons rx;
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struct xsk_umem_info *umem;
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struct xsk_socket *xsk;
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struct rte_mempool *mb_pool;
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struct rx_stats stats;
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struct pkt_tx_queue *pair;
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uint16_t queue_idx;
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};
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struct tx_stats {
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uint64_t tx_pkts;
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uint64_t err_pkts;
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uint64_t tx_bytes;
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};
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struct pkt_tx_queue {
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struct xsk_ring_prod tx;
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struct tx_stats stats;
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struct pkt_rx_queue *pair;
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uint16_t queue_idx;
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};
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struct pmd_internals {
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int if_index;
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char if_name[IFNAMSIZ];
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uint16_t queue_idx;
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struct ether_addr eth_addr;
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struct xsk_umem_info *umem;
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struct rte_mempool *mb_pool_share;
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struct pkt_rx_queue rx_queues[ETH_AF_XDP_MAX_QUEUE_PAIRS];
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struct pkt_tx_queue tx_queues[ETH_AF_XDP_MAX_QUEUE_PAIRS];
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};
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#define ETH_AF_XDP_IFACE_ARG "iface"
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#define ETH_AF_XDP_QUEUE_IDX_ARG "queue"
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static const char * const valid_arguments[] = {
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ETH_AF_XDP_IFACE_ARG,
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ETH_AF_XDP_QUEUE_IDX_ARG,
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NULL
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};
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static const struct rte_eth_link pmd_link = {
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.link_speed = ETH_SPEED_NUM_10G,
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.link_duplex = ETH_LINK_FULL_DUPLEX,
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.link_status = ETH_LINK_DOWN,
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.link_autoneg = ETH_LINK_AUTONEG
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};
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static inline int
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reserve_fill_queue(struct xsk_umem_info *umem, int reserve_size)
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{
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struct xsk_ring_prod *fq = &umem->fq;
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uint32_t idx;
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int i, ret;
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ret = xsk_ring_prod__reserve(fq, reserve_size, &idx);
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if (unlikely(!ret)) {
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AF_XDP_LOG(ERR, "Failed to reserve enough fq descs.\n");
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return ret;
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}
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for (i = 0; i < reserve_size; i++) {
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__u64 *fq_addr;
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void *addr = NULL;
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if (rte_ring_dequeue(umem->buf_ring, &addr)) {
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i--;
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break;
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}
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fq_addr = xsk_ring_prod__fill_addr(fq, idx++);
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*fq_addr = (uint64_t)addr;
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}
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xsk_ring_prod__submit(fq, i);
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return 0;
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}
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static uint16_t
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eth_af_xdp_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
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{
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struct pkt_rx_queue *rxq = queue;
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struct xsk_ring_cons *rx = &rxq->rx;
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struct xsk_umem_info *umem = rxq->umem;
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struct xsk_ring_prod *fq = &umem->fq;
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uint32_t idx_rx = 0;
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uint32_t free_thresh = fq->size >> 1;
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struct rte_mbuf *mbufs[ETH_AF_XDP_TX_BATCH_SIZE];
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unsigned long dropped = 0;
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unsigned long rx_bytes = 0;
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uint16_t count = 0;
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int rcvd, i;
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nb_pkts = RTE_MIN(nb_pkts, ETH_AF_XDP_TX_BATCH_SIZE);
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rcvd = xsk_ring_cons__peek(rx, nb_pkts, &idx_rx);
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if (rcvd == 0)
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return 0;
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if (xsk_prod_nb_free(fq, free_thresh) >= free_thresh)
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(void)reserve_fill_queue(umem, ETH_AF_XDP_RX_BATCH_SIZE);
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if (unlikely(rte_pktmbuf_alloc_bulk(rxq->mb_pool, mbufs, rcvd) != 0))
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return 0;
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for (i = 0; i < rcvd; i++) {
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const struct xdp_desc *desc;
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uint64_t addr;
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uint32_t len;
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void *pkt;
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desc = xsk_ring_cons__rx_desc(rx, idx_rx++);
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addr = desc->addr;
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len = desc->len;
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pkt = xsk_umem__get_data(rxq->umem->mz->addr, addr);
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rte_memcpy(rte_pktmbuf_mtod(mbufs[i], void *), pkt, len);
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rte_pktmbuf_pkt_len(mbufs[i]) = len;
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rte_pktmbuf_data_len(mbufs[i]) = len;
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rx_bytes += len;
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bufs[count++] = mbufs[i];
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rte_ring_enqueue(umem->buf_ring, (void *)addr);
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}
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xsk_ring_cons__release(rx, rcvd);
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/* statistics */
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rxq->stats.rx_pkts += (rcvd - dropped);
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rxq->stats.rx_bytes += rx_bytes;
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return count;
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}
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static void
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pull_umem_cq(struct xsk_umem_info *umem, int size)
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{
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struct xsk_ring_cons *cq = &umem->cq;
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size_t i, n;
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uint32_t idx_cq = 0;
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n = xsk_ring_cons__peek(cq, size, &idx_cq);
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for (i = 0; i < n; i++) {
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uint64_t addr;
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addr = *xsk_ring_cons__comp_addr(cq, idx_cq++);
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rte_ring_enqueue(umem->buf_ring, (void *)addr);
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}
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xsk_ring_cons__release(cq, n);
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}
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static void
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kick_tx(struct pkt_tx_queue *txq)
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{
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struct xsk_umem_info *umem = txq->pair->umem;
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while (send(xsk_socket__fd(txq->pair->xsk), NULL,
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0, MSG_DONTWAIT) < 0) {
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/* some thing unexpected */
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if (errno != EBUSY && errno != EAGAIN && errno != EINTR)
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break;
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|
||||
/* pull from completion queue to leave more space */
|
||||
if (errno == EAGAIN)
|
||||
pull_umem_cq(umem, ETH_AF_XDP_TX_BATCH_SIZE);
|
||||
}
|
||||
pull_umem_cq(umem, ETH_AF_XDP_TX_BATCH_SIZE);
|
||||
}
|
||||
|
||||
static uint16_t
|
||||
eth_af_xdp_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
|
||||
{
|
||||
struct pkt_tx_queue *txq = queue;
|
||||
struct xsk_umem_info *umem = txq->pair->umem;
|
||||
struct rte_mbuf *mbuf;
|
||||
void *addrs[ETH_AF_XDP_TX_BATCH_SIZE];
|
||||
unsigned long tx_bytes = 0;
|
||||
int i, valid = 0;
|
||||
uint32_t idx_tx;
|
||||
|
||||
nb_pkts = RTE_MIN(nb_pkts, ETH_AF_XDP_TX_BATCH_SIZE);
|
||||
|
||||
pull_umem_cq(umem, nb_pkts);
|
||||
|
||||
nb_pkts = rte_ring_dequeue_bulk(umem->buf_ring, addrs,
|
||||
nb_pkts, NULL);
|
||||
if (nb_pkts == 0)
|
||||
return 0;
|
||||
|
||||
if (xsk_ring_prod__reserve(&txq->tx, nb_pkts, &idx_tx) != nb_pkts) {
|
||||
kick_tx(txq);
|
||||
return 0;
|
||||
}
|
||||
|
||||
for (i = 0; i < nb_pkts; i++) {
|
||||
struct xdp_desc *desc;
|
||||
void *pkt;
|
||||
uint32_t buf_len = ETH_AF_XDP_FRAME_SIZE
|
||||
- ETH_AF_XDP_DATA_HEADROOM;
|
||||
desc = xsk_ring_prod__tx_desc(&txq->tx, idx_tx + i);
|
||||
mbuf = bufs[i];
|
||||
if (mbuf->pkt_len <= buf_len) {
|
||||
desc->addr = (uint64_t)addrs[valid];
|
||||
desc->len = mbuf->pkt_len;
|
||||
pkt = xsk_umem__get_data(umem->mz->addr,
|
||||
desc->addr);
|
||||
rte_memcpy(pkt, rte_pktmbuf_mtod(mbuf, void *),
|
||||
desc->len);
|
||||
valid++;
|
||||
tx_bytes += mbuf->pkt_len;
|
||||
}
|
||||
rte_pktmbuf_free(mbuf);
|
||||
}
|
||||
|
||||
xsk_ring_prod__submit(&txq->tx, nb_pkts);
|
||||
|
||||
kick_tx(txq);
|
||||
|
||||
if (valid < nb_pkts)
|
||||
rte_ring_enqueue_bulk(umem->buf_ring, &addrs[valid],
|
||||
nb_pkts - valid, NULL);
|
||||
|
||||
txq->stats.err_pkts += nb_pkts - valid;
|
||||
txq->stats.tx_pkts += valid;
|
||||
txq->stats.tx_bytes += tx_bytes;
|
||||
|
||||
return nb_pkts;
|
||||
}
|
||||
|
||||
static int
|
||||
eth_dev_start(struct rte_eth_dev *dev)
|
||||
{
|
||||
dev->data->dev_link.link_status = ETH_LINK_UP;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* This function gets called when the current port gets stopped. */
|
||||
static void
|
||||
eth_dev_stop(struct rte_eth_dev *dev)
|
||||
{
|
||||
dev->data->dev_link.link_status = ETH_LINK_DOWN;
|
||||
}
|
||||
|
||||
static int
|
||||
eth_dev_configure(struct rte_eth_dev *dev)
|
||||
{
|
||||
/* rx/tx must be paired */
|
||||
if (dev->data->nb_rx_queues != dev->data->nb_tx_queues)
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
|
||||
dev_info->if_index = internals->if_index;
|
||||
dev_info->max_mac_addrs = 1;
|
||||
dev_info->max_rx_pktlen = ETH_FRAME_LEN;
|
||||
dev_info->max_rx_queues = 1;
|
||||
dev_info->max_tx_queues = 1;
|
||||
|
||||
dev_info->default_rxportconf.nb_queues = 1;
|
||||
dev_info->default_txportconf.nb_queues = 1;
|
||||
dev_info->default_rxportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
|
||||
dev_info->default_txportconf.ring_size = ETH_AF_XDP_DFLT_NUM_DESCS;
|
||||
}
|
||||
|
||||
static int
|
||||
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
struct xdp_statistics xdp_stats;
|
||||
struct pkt_rx_queue *rxq;
|
||||
socklen_t optlen;
|
||||
int i, ret;
|
||||
|
||||
for (i = 0; i < dev->data->nb_rx_queues; i++) {
|
||||
optlen = sizeof(struct xdp_statistics);
|
||||
rxq = &internals->rx_queues[i];
|
||||
stats->q_ipackets[i] = internals->rx_queues[i].stats.rx_pkts;
|
||||
stats->q_ibytes[i] = internals->rx_queues[i].stats.rx_bytes;
|
||||
|
||||
stats->q_opackets[i] = internals->tx_queues[i].stats.tx_pkts;
|
||||
stats->q_obytes[i] = internals->tx_queues[i].stats.tx_bytes;
|
||||
|
||||
stats->ipackets += stats->q_ipackets[i];
|
||||
stats->ibytes += stats->q_ibytes[i];
|
||||
stats->imissed += internals->rx_queues[i].stats.rx_dropped;
|
||||
ret = getsockopt(xsk_socket__fd(rxq->xsk), SOL_XDP,
|
||||
XDP_STATISTICS, &xdp_stats, &optlen);
|
||||
if (ret != 0) {
|
||||
AF_XDP_LOG(ERR, "getsockopt() failed for XDP_STATISTICS.\n");
|
||||
return -1;
|
||||
}
|
||||
stats->imissed += xdp_stats.rx_dropped;
|
||||
|
||||
stats->opackets += stats->q_opackets[i];
|
||||
stats->oerrors += internals->tx_queues[i].stats.err_pkts;
|
||||
stats->obytes += stats->q_obytes[i];
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
eth_stats_reset(struct rte_eth_dev *dev)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ETH_AF_XDP_MAX_QUEUE_PAIRS; i++) {
|
||||
memset(&internals->rx_queues[i].stats, 0,
|
||||
sizeof(struct rx_stats));
|
||||
memset(&internals->tx_queues[i].stats, 0,
|
||||
sizeof(struct tx_stats));
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
remove_xdp_program(struct pmd_internals *internals)
|
||||
{
|
||||
uint32_t curr_prog_id = 0;
|
||||
|
||||
if (bpf_get_link_xdp_id(internals->if_index, &curr_prog_id,
|
||||
XDP_FLAGS_UPDATE_IF_NOEXIST)) {
|
||||
AF_XDP_LOG(ERR, "bpf_get_link_xdp_id failed\n");
|
||||
return;
|
||||
}
|
||||
bpf_set_link_xdp_fd(internals->if_index, -1,
|
||||
XDP_FLAGS_UPDATE_IF_NOEXIST);
|
||||
}
|
||||
|
||||
static void
|
||||
eth_dev_close(struct rte_eth_dev *dev)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
struct pkt_rx_queue *rxq;
|
||||
int i;
|
||||
|
||||
AF_XDP_LOG(INFO, "Closing AF_XDP ethdev on numa socket %u\n",
|
||||
rte_socket_id());
|
||||
|
||||
for (i = 0; i < ETH_AF_XDP_MAX_QUEUE_PAIRS; i++) {
|
||||
rxq = &internals->rx_queues[i];
|
||||
if (rxq->umem == NULL)
|
||||
break;
|
||||
xsk_socket__delete(rxq->xsk);
|
||||
}
|
||||
|
||||
(void)xsk_umem__delete(internals->umem->umem);
|
||||
remove_xdp_program(internals);
|
||||
}
|
||||
|
||||
static void
|
||||
eth_queue_release(void *q __rte_unused)
|
||||
{
|
||||
}
|
||||
|
||||
static int
|
||||
eth_link_update(struct rte_eth_dev *dev __rte_unused,
|
||||
int wait_to_complete __rte_unused)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
xdp_umem_destroy(struct xsk_umem_info *umem)
|
||||
{
|
||||
rte_memzone_free(umem->mz);
|
||||
umem->mz = NULL;
|
||||
|
||||
rte_ring_free(umem->buf_ring);
|
||||
umem->buf_ring = NULL;
|
||||
|
||||
rte_free(umem);
|
||||
umem = NULL;
|
||||
}
|
||||
|
||||
static struct
|
||||
xsk_umem_info *xdp_umem_configure(void)
|
||||
{
|
||||
struct xsk_umem_info *umem;
|
||||
const struct rte_memzone *mz;
|
||||
struct xsk_umem_config usr_config = {
|
||||
.fill_size = ETH_AF_XDP_DFLT_NUM_DESCS,
|
||||
.comp_size = ETH_AF_XDP_DFLT_NUM_DESCS,
|
||||
.frame_size = ETH_AF_XDP_FRAME_SIZE,
|
||||
.frame_headroom = ETH_AF_XDP_DATA_HEADROOM };
|
||||
int ret;
|
||||
uint64_t i;
|
||||
|
||||
umem = rte_zmalloc_socket("umem", sizeof(*umem), 0, rte_socket_id());
|
||||
if (umem == NULL) {
|
||||
AF_XDP_LOG(ERR, "Failed to allocate umem info");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
umem->buf_ring = rte_ring_create("af_xdp_ring",
|
||||
ETH_AF_XDP_NUM_BUFFERS,
|
||||
rte_socket_id(),
|
||||
0x0);
|
||||
if (umem->buf_ring == NULL) {
|
||||
AF_XDP_LOG(ERR, "Failed to create rte_ring\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
for (i = 0; i < ETH_AF_XDP_NUM_BUFFERS; i++)
|
||||
rte_ring_enqueue(umem->buf_ring,
|
||||
(void *)(i * ETH_AF_XDP_FRAME_SIZE +
|
||||
ETH_AF_XDP_DATA_HEADROOM));
|
||||
|
||||
mz = rte_memzone_reserve_aligned("af_xdp uemem",
|
||||
ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
|
||||
rte_socket_id(), RTE_MEMZONE_IOVA_CONTIG,
|
||||
getpagesize());
|
||||
if (mz == NULL) {
|
||||
AF_XDP_LOG(ERR, "Failed to reserve memzone for af_xdp umem.\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = xsk_umem__create(&umem->umem, mz->addr,
|
||||
ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
|
||||
&umem->fq, &umem->cq,
|
||||
&usr_config);
|
||||
|
||||
if (ret) {
|
||||
AF_XDP_LOG(ERR, "Failed to create umem");
|
||||
goto err;
|
||||
}
|
||||
umem->mz = mz;
|
||||
|
||||
return umem;
|
||||
|
||||
err:
|
||||
xdp_umem_destroy(umem);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int
|
||||
xsk_configure(struct pmd_internals *internals, struct pkt_rx_queue *rxq,
|
||||
int ring_size)
|
||||
{
|
||||
struct xsk_socket_config cfg;
|
||||
struct pkt_tx_queue *txq = rxq->pair;
|
||||
int ret = 0;
|
||||
int reserve_size;
|
||||
|
||||
rxq->umem = xdp_umem_configure();
|
||||
if (rxq->umem == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
cfg.rx_size = ring_size;
|
||||
cfg.tx_size = ring_size;
|
||||
cfg.libbpf_flags = 0;
|
||||
cfg.xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
|
||||
cfg.bind_flags = 0;
|
||||
ret = xsk_socket__create(&rxq->xsk, internals->if_name,
|
||||
internals->queue_idx, rxq->umem->umem, &rxq->rx,
|
||||
&txq->tx, &cfg);
|
||||
if (ret) {
|
||||
AF_XDP_LOG(ERR, "Failed to create xsk socket.\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
reserve_size = ETH_AF_XDP_DFLT_NUM_DESCS / 2;
|
||||
ret = reserve_fill_queue(rxq->umem, reserve_size);
|
||||
if (ret) {
|
||||
xsk_socket__delete(rxq->xsk);
|
||||
AF_XDP_LOG(ERR, "Failed to reserve fill queue.\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
xdp_umem_destroy(rxq->umem);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
queue_reset(struct pmd_internals *internals, uint16_t queue_idx)
|
||||
{
|
||||
struct pkt_rx_queue *rxq = &internals->rx_queues[queue_idx];
|
||||
struct pkt_tx_queue *txq = rxq->pair;
|
||||
|
||||
memset(rxq, 0, sizeof(*rxq));
|
||||
memset(txq, 0, sizeof(*txq));
|
||||
rxq->pair = txq;
|
||||
txq->pair = rxq;
|
||||
rxq->queue_idx = queue_idx;
|
||||
txq->queue_idx = queue_idx;
|
||||
}
|
||||
|
||||
static int
|
||||
eth_rx_queue_setup(struct rte_eth_dev *dev,
|
||||
uint16_t rx_queue_id,
|
||||
uint16_t nb_rx_desc,
|
||||
unsigned int socket_id __rte_unused,
|
||||
const struct rte_eth_rxconf *rx_conf __rte_unused,
|
||||
struct rte_mempool *mb_pool)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
uint32_t buf_size, data_size;
|
||||
struct pkt_rx_queue *rxq;
|
||||
int ret;
|
||||
|
||||
rxq = &internals->rx_queues[rx_queue_id];
|
||||
queue_reset(internals, rx_queue_id);
|
||||
|
||||
/* Now get the space available for data in the mbuf */
|
||||
buf_size = rte_pktmbuf_data_room_size(mb_pool) -
|
||||
RTE_PKTMBUF_HEADROOM;
|
||||
data_size = ETH_AF_XDP_FRAME_SIZE - ETH_AF_XDP_DATA_HEADROOM;
|
||||
|
||||
if (data_size > buf_size) {
|
||||
AF_XDP_LOG(ERR, "%s: %d bytes will not fit in mbuf (%d bytes)\n",
|
||||
dev->device->name, data_size, buf_size);
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
rxq->mb_pool = mb_pool;
|
||||
|
||||
if (xsk_configure(internals, rxq, nb_rx_desc)) {
|
||||
AF_XDP_LOG(ERR, "Failed to configure xdp socket\n");
|
||||
ret = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
internals->umem = rxq->umem;
|
||||
|
||||
dev->data->rx_queues[rx_queue_id] = rxq;
|
||||
return 0;
|
||||
|
||||
err:
|
||||
queue_reset(internals, rx_queue_id);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int
|
||||
eth_tx_queue_setup(struct rte_eth_dev *dev,
|
||||
uint16_t tx_queue_id,
|
||||
uint16_t nb_tx_desc __rte_unused,
|
||||
unsigned int socket_id __rte_unused,
|
||||
const struct rte_eth_txconf *tx_conf __rte_unused)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
struct pkt_tx_queue *txq;
|
||||
|
||||
txq = &internals->tx_queues[tx_queue_id];
|
||||
|
||||
dev->data->tx_queues[tx_queue_id] = txq;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
struct ifreq ifr = { .ifr_mtu = mtu };
|
||||
int ret;
|
||||
int s;
|
||||
|
||||
s = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
if (s < 0)
|
||||
return -EINVAL;
|
||||
|
||||
strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
|
||||
ret = ioctl(s, SIOCSIFMTU, &ifr);
|
||||
close(s);
|
||||
|
||||
return (ret < 0) ? -errno : 0;
|
||||
}
|
||||
|
||||
static void
|
||||
eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
|
||||
{
|
||||
struct ifreq ifr;
|
||||
int s;
|
||||
|
||||
s = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
if (s < 0)
|
||||
return;
|
||||
|
||||
strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
|
||||
if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
|
||||
goto out;
|
||||
ifr.ifr_flags &= mask;
|
||||
ifr.ifr_flags |= flags;
|
||||
if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
|
||||
goto out;
|
||||
out:
|
||||
close(s);
|
||||
}
|
||||
|
||||
static void
|
||||
eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
|
||||
eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
|
||||
}
|
||||
|
||||
static void
|
||||
eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
|
||||
{
|
||||
struct pmd_internals *internals = dev->data->dev_private;
|
||||
|
||||
eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
|
||||
}
|
||||
|
||||
static const struct eth_dev_ops ops = {
|
||||
.dev_start = eth_dev_start,
|
||||
.dev_stop = eth_dev_stop,
|
||||
.dev_close = eth_dev_close,
|
||||
.dev_configure = eth_dev_configure,
|
||||
.dev_infos_get = eth_dev_info,
|
||||
.mtu_set = eth_dev_mtu_set,
|
||||
.promiscuous_enable = eth_dev_promiscuous_enable,
|
||||
.promiscuous_disable = eth_dev_promiscuous_disable,
|
||||
.rx_queue_setup = eth_rx_queue_setup,
|
||||
.tx_queue_setup = eth_tx_queue_setup,
|
||||
.rx_queue_release = eth_queue_release,
|
||||
.tx_queue_release = eth_queue_release,
|
||||
.link_update = eth_link_update,
|
||||
.stats_get = eth_stats_get,
|
||||
.stats_reset = eth_stats_reset,
|
||||
};
|
||||
|
||||
/** parse integer from integer argument */
|
||||
static int
|
||||
parse_integer_arg(const char *key __rte_unused,
|
||||
const char *value, void *extra_args)
|
||||
{
|
||||
int *i = (int *)extra_args;
|
||||
char *end;
|
||||
|
||||
*i = strtol(value, &end, 10);
|
||||
if (*i < 0) {
|
||||
AF_XDP_LOG(ERR, "Argument has to be positive.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** parse name argument */
|
||||
static int
|
||||
parse_name_arg(const char *key __rte_unused,
|
||||
const char *value, void *extra_args)
|
||||
{
|
||||
char *name = extra_args;
|
||||
|
||||
if (strnlen(value, IFNAMSIZ) > IFNAMSIZ - 1) {
|
||||
AF_XDP_LOG(ERR, "Invalid name %s, should be less than %u bytes.\n",
|
||||
value, IFNAMSIZ);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
strlcpy(name, value, IFNAMSIZ);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
parse_parameters(struct rte_kvargs *kvlist,
|
||||
char *if_name,
|
||||
int *queue_idx)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = rte_kvargs_process(kvlist, ETH_AF_XDP_IFACE_ARG,
|
||||
&parse_name_arg, if_name);
|
||||
if (ret < 0)
|
||||
goto free_kvlist;
|
||||
|
||||
ret = rte_kvargs_process(kvlist, ETH_AF_XDP_QUEUE_IDX_ARG,
|
||||
&parse_integer_arg, queue_idx);
|
||||
if (ret < 0)
|
||||
goto free_kvlist;
|
||||
|
||||
free_kvlist:
|
||||
rte_kvargs_free(kvlist);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int
|
||||
get_iface_info(const char *if_name,
|
||||
struct ether_addr *eth_addr,
|
||||
int *if_index)
|
||||
{
|
||||
struct ifreq ifr;
|
||||
int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
|
||||
|
||||
if (sock < 0)
|
||||
return -1;
|
||||
|
||||
strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
|
||||
if (ioctl(sock, SIOCGIFINDEX, &ifr))
|
||||
goto error;
|
||||
|
||||
*if_index = ifr.ifr_ifindex;
|
||||
|
||||
if (ioctl(sock, SIOCGIFHWADDR, &ifr))
|
||||
goto error;
|
||||
|
||||
rte_memcpy(eth_addr, ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
|
||||
|
||||
close(sock);
|
||||
return 0;
|
||||
|
||||
error:
|
||||
close(sock);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static struct rte_eth_dev *
|
||||
init_internals(struct rte_vdev_device *dev,
|
||||
const char *if_name,
|
||||
int queue_idx)
|
||||
{
|
||||
const char *name = rte_vdev_device_name(dev);
|
||||
const unsigned int numa_node = dev->device.numa_node;
|
||||
struct pmd_internals *internals;
|
||||
struct rte_eth_dev *eth_dev;
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
|
||||
if (internals == NULL)
|
||||
return NULL;
|
||||
|
||||
internals->queue_idx = queue_idx;
|
||||
strlcpy(internals->if_name, if_name, IFNAMSIZ);
|
||||
|
||||
for (i = 0; i < ETH_AF_XDP_MAX_QUEUE_PAIRS; i++) {
|
||||
internals->tx_queues[i].pair = &internals->rx_queues[i];
|
||||
internals->rx_queues[i].pair = &internals->tx_queues[i];
|
||||
}
|
||||
|
||||
ret = get_iface_info(if_name, &internals->eth_addr,
|
||||
&internals->if_index);
|
||||
if (ret)
|
||||
goto err;
|
||||
|
||||
eth_dev = rte_eth_vdev_allocate(dev, 0);
|
||||
if (eth_dev == NULL)
|
||||
goto err;
|
||||
|
||||
eth_dev->data->dev_private = internals;
|
||||
eth_dev->data->dev_link = pmd_link;
|
||||
eth_dev->data->mac_addrs = &internals->eth_addr;
|
||||
eth_dev->dev_ops = &ops;
|
||||
eth_dev->rx_pkt_burst = eth_af_xdp_rx;
|
||||
eth_dev->tx_pkt_burst = eth_af_xdp_tx;
|
||||
|
||||
return eth_dev;
|
||||
|
||||
err:
|
||||
rte_free(internals);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int
|
||||
rte_pmd_af_xdp_probe(struct rte_vdev_device *dev)
|
||||
{
|
||||
struct rte_kvargs *kvlist;
|
||||
char if_name[IFNAMSIZ] = {'\0'};
|
||||
int xsk_queue_idx = ETH_AF_XDP_DFLT_QUEUE_IDX;
|
||||
struct rte_eth_dev *eth_dev = NULL;
|
||||
const char *name;
|
||||
|
||||
AF_XDP_LOG(INFO, "Initializing pmd_af_xdp for %s\n",
|
||||
rte_vdev_device_name(dev));
|
||||
|
||||
name = rte_vdev_device_name(dev);
|
||||
if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
|
||||
strlen(rte_vdev_device_args(dev)) == 0) {
|
||||
eth_dev = rte_eth_dev_attach_secondary(name);
|
||||
if (eth_dev == NULL) {
|
||||
AF_XDP_LOG(ERR, "Failed to probe %s\n", name);
|
||||
return -EINVAL;
|
||||
}
|
||||
eth_dev->dev_ops = &ops;
|
||||
rte_eth_dev_probing_finish(eth_dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
|
||||
if (kvlist == NULL) {
|
||||
AF_XDP_LOG(ERR, "Invalid kvargs key\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (dev->device.numa_node == SOCKET_ID_ANY)
|
||||
dev->device.numa_node = rte_socket_id();
|
||||
|
||||
if (parse_parameters(kvlist, if_name, &xsk_queue_idx) < 0) {
|
||||
AF_XDP_LOG(ERR, "Invalid kvargs value\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (strlen(if_name) == 0) {
|
||||
AF_XDP_LOG(ERR, "Network interface must be specified\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
eth_dev = init_internals(dev, if_name, xsk_queue_idx);
|
||||
if (eth_dev == NULL) {
|
||||
AF_XDP_LOG(ERR, "Failed to init internals\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
rte_eth_dev_probing_finish(eth_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
rte_pmd_af_xdp_remove(struct rte_vdev_device *dev)
|
||||
{
|
||||
struct rte_eth_dev *eth_dev = NULL;
|
||||
struct pmd_internals *internals;
|
||||
|
||||
AF_XDP_LOG(INFO, "Removing AF_XDP ethdev on numa socket %u\n",
|
||||
rte_socket_id());
|
||||
|
||||
if (dev == NULL)
|
||||
return -1;
|
||||
|
||||
/* find the ethdev entry */
|
||||
eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
|
||||
if (eth_dev == NULL)
|
||||
return -1;
|
||||
|
||||
internals = eth_dev->data->dev_private;
|
||||
|
||||
rte_ring_free(internals->umem->buf_ring);
|
||||
rte_memzone_free(internals->umem->mz);
|
||||
rte_free(internals->umem);
|
||||
|
||||
rte_eth_dev_release_port(eth_dev);
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct rte_vdev_driver pmd_af_xdp_drv = {
|
||||
.probe = rte_pmd_af_xdp_probe,
|
||||
.remove = rte_pmd_af_xdp_remove,
|
||||
};
|
||||
|
||||
RTE_PMD_REGISTER_VDEV(net_af_xdp, pmd_af_xdp_drv);
|
||||
RTE_PMD_REGISTER_PARAM_STRING(net_af_xdp,
|
||||
"iface=<string> "
|
||||
"queue=<int> ");
|
||||
|
||||
RTE_INIT(af_xdp_init_log)
|
||||
{
|
||||
af_xdp_logtype = rte_log_register("pmd.net.af_xdp");
|
||||
if (af_xdp_logtype >= 0)
|
||||
rte_log_set_level(af_xdp_logtype, RTE_LOG_NOTICE);
|
||||
}
|
||||
3
drivers/net/af_xdp/rte_pmd_af_xdp_version.map
Normal file
3
drivers/net/af_xdp/rte_pmd_af_xdp_version.map
Normal file
@ -0,0 +1,3 @@
|
||||
DPDK_19.05 {
|
||||
local: *;
|
||||
};
|
||||
@ -2,6 +2,7 @@
|
||||
# Copyright(c) 2017 Intel Corporation
|
||||
|
||||
drivers = ['af_packet',
|
||||
'af_xdp',
|
||||
'ark',
|
||||
'atlantic',
|
||||
'avp',
|
||||
|
||||
@ -144,6 +144,7 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_DPAA2_MEMPOOL) += -lrte_mempool_dpaa2
|
||||
endif
|
||||
|
||||
_LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_AF_PACKET) += -lrte_pmd_af_packet
|
||||
_LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_AF_XDP) += -lrte_pmd_af_xdp -lbpf
|
||||
_LDLIBS-$(CONFIG_RTE_LIBRTE_ARK_PMD) += -lrte_pmd_ark
|
||||
_LDLIBS-$(CONFIG_RTE_LIBRTE_ATLANTIC_PMD) += -lrte_pmd_atlantic
|
||||
_LDLIBS-$(CONFIG_RTE_LIBRTE_AVP_PMD) += -lrte_pmd_avp
|
||||
|
||||
Loading…
Reference in New Issue
Block a user