1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2017 Intel Corporation
6 Loop-back Sample Application using Baseband Device (bbdev)
7 ==========================================================
9 The baseband sample application is a simple example of packet processing using
10 the Data Plane Development Kit (DPDK) for baseband workloads using Wireless
11 Device abstraction library.
16 The Baseband device sample application performs a loop-back operation using a
17 baseband device capable of transceiving data packets.
18 A packet is received on an ethernet port -> enqueued for downlink baseband
19 operation -> dequeued from the downlink baseband device -> enqueued for uplink
20 baseband operation -> dequeued from the baseband device -> then the received
21 packet is compared with the baseband operations output. Then it's looped back to
24 * The MAC header is preserved in the packet
29 * Only one baseband device and one ethernet port can be used.
31 Compiling the Application
32 -------------------------
34 DPDK needs to be built with ``baseband_turbo_sw`` PMD driver enabled along
35 with ``FLEXRAN SDK`` Libraries. Refer to *SW Turbo Poll Mode Driver*
36 documentation for more details on this.
38 To compile the sample application see :doc:`compiling`.
41 Running the Application
42 -----------------------
44 The application accepts a number of command line options:
46 .. code-block:: console
48 $ ./<build_dir>/examples/dpdk-bbdev [EAL options] -- [-e ENCODING_CORES] /
49 [-d DECODING_CORES] [-p ETH_PORT_ID] [-b BBDEV_ID]
53 * ``e ENCODING_CORES``: hexmask for encoding lcores (default = 0x2)
54 * ``d DECODING_CORES``: hexmask for decoding lcores (default = 0x4)
55 * ``p ETH_PORT_ID``: ethernet port ID (default = 0)
56 * ``b BBDEV_ID``: BBDev ID (default = 0)
58 The application requires that baseband devices is capable of performing
59 the specified baseband operation are available on application initialization.
60 This means that HW baseband device/s must be bound to a DPDK driver or
61 a SW baseband device/s (virtual BBdev) must be created (using --vdev).
63 To run the application in linux environment with the turbo_sw baseband device
64 using the allow option for pci device running on 1 encoding lcore and 1 decoding lcore
67 .. code-block:: console
69 $ ./<build_dir>/examples/dpdk-bbdev --vdev='baseband_turbo_sw' -a <NIC0PCIADDR> \
70 -c 0x38 --socket-mem=2,2 --file-prefix=bbdev -- -e 0x10 -d 0x20
72 where, NIC0PCIADDR is the PCI address of the Rx port
74 This command creates one virtual bbdev devices ``baseband_turbo_sw`` where the
75 device gets linked to a corresponding ethernet port as allowed by
77 3 cores are allocated to the application, and assigned as:
79 - core 3 is the main and used to print the stats live on screen,
81 - core 4 is the encoding lcore performing Rx and Turbo Encode operations
83 - core 5 is the downlink lcore performing Turbo Decode, validation and Tx
87 Refer to the *DPDK Getting Started Guide* for general information on running
88 applications and the Environment Abstraction Layer (EAL) options.
90 Using Packet Generator with baseband device sample application
91 --------------------------------------------------------------
93 To allow the bbdev sample app to do the loopback, an influx of traffic is required.
94 This can be done by using DPDK Pktgen to burst traffic on two ethernet ports, and
95 it will print the transmitted along with the looped-back traffic on Rx ports.
96 Executing the command below will generate traffic on the two allowed ethernet
99 .. code-block:: console
101 $ ./pktgen-3.4.0/app/x86_64-native-linux-gcc/pktgen -c 0x3 \
102 --socket-mem=1,1 --file-prefix=pg -a <NIC1PCIADDR> -- -m 1.0 -P
106 * ``-c COREMASK``: A hexadecimal bitmask of cores to run on
107 * ``--socket-mem``: Memory to allocate on specific sockets (use comma separated values)
108 * ``--file-prefix``: Prefix for hugepage filenames
109 * ``-a <NIC1PCIADDR>``: Add a PCI device in allow list. The argument format is <[domain:]bus:devid.func>.
110 * ``-m <string>``: Matrix for mapping ports to logical cores.
111 * ``-P``: PROMISCUOUS mode
114 Refer to *The Pktgen Application* documents for general information on running
115 Pktgen with DPDK applications.