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 #. Go to the example directory:
40 .. code-block:: console
42 export RTE_SDK=/path/to/rte_sdk
43 cd ${RTE_SDK}/examples/bbdev_app
45 #. Set the target (a default target is used if not specified). For example:
47 .. code-block:: console
49 export RTE_TARGET=x86_64-native-linuxapp-gcc
51 See the *DPDK Getting Started Guide* for possible RTE_TARGET values.
53 #. Build the application:
55 .. code-block:: console
59 Running the Application
60 -----------------------
62 The application accepts a number of command line options:
64 .. code-block:: console
66 $ ./build/bbdev [EAL options] -- [-e ENCODING_CORES] [-d DECODING_CORES] /
67 [-p ETH_PORT_ID] [-b BBDEV_ID]
71 * ``e ENCODING_CORES``: hexmask for encoding lcored (default = 0x2)
72 * ``d DECODING_CORES``: hexmask for decoding lcores (default = 0x4)
73 * ``p ETH_PORT_ID``: ethernet port ID (default = 0)
74 * ``b BBDEV_ID``: BBDev ID (default = 0)
76 The application requires that baseband devices is capable of performing
77 the specified baseband operation are available on application initialization.
78 This means that HW baseband device/s must be bound to a DPDK driver or
79 a SW baseband device/s (virtual BBdev) must be created (using --vdev).
81 To run the application in linuxapp environment with the turbo_sw baseband device
82 using the whitelisted port running on 1 encoding lcore and 1 decoding lcore
85 .. code-block:: console
87 $ ./build/bbdev --vdev='baseband_turbo_sw' -w <NIC0PCIADDR> -c 0x38 --socket-mem=2,2 \
88 --file-prefix=bbdev -- -e 0x10 -d 0x20
90 where, NIC0PCIADDR is the PCI addresse of the Rx port
92 This command creates one virtual bbdev devices ``baseband_turbo_sw`` where the
93 device gets linked to a corresponding ethernet port as whitelisted by
95 3 cores are allocated to the application, and assigned as:
97 - core 3 is the master and used to print the stats live on screen,
99 - core 4 is the encoding lcore performing Rx and Turbo Encode operations
101 - core 5 is the downlink lcore performing Turbo Decode, validation and Tx
105 Refer to the *DPDK Getting Started Guide* for general information on running
106 applications and the Environment Abstraction Layer (EAL) options.
108 Using Packet Generator with baseband device sample application
109 --------------------------------------------------------------
111 To allow the bbdev sample app to do the loopback, an influx of traffic is required.
112 This can be done by using DPDK Pktgen to burst traffic on two ethernet ports, and
113 it will print the transmitted along with the looped-back traffic on Rx ports.
114 Executing the command below will generate traffic on the two whitelisted ethernet
117 .. code-block:: console
119 $ ./pktgen-3.4.0/app/x86_64-native-linuxapp-gcc/pktgen -c 0x3 \
120 --socket-mem=1,1 --file-prefix=pg -w <NIC1PCIADDR> -- -m 1.0 -P
124 * ``-c COREMASK``: A hexadecimal bitmask of cores to run on
125 * ``--socket-mem``: Memory to allocate on specific sockets (use comma separated values)
126 * ``--file-prefix``: Prefix for hugepage filenames
127 * ``-w <NIC1PCIADDR>``: Add a PCI device in white list. The argument format is <[domain:]bus:devid.func>.
128 * ``-m <string>``: Matrix for mapping ports to logical cores.
129 * ``-P``: PROMISCUOUS mode
132 Refer to *The Pktgen Application* documents for general information on running
133 Pktgen with DPDK applications.