[dpdk-dev] Regarding bond and slave driver configuration in DPDK 19.11

[Nandini Rangaswamy]

Hi ,
I am attempting to setup/configure bond and slave interfaces in DPDK application and it fails in DPDK 19.11.
DPDK daemon is started with the following command line arguments:
--no-daemon --socket-mem 1024 1024 --vdev eth_bond_bond0,mode=4,xmit_policy=l34,socket_id=1,mac=ac:1f:6b:8d:d7:c6,lacp_rate=1,slave=0000:81:00.0,slave=0000:81:00.1


  1.  DPDK application initializes the bond interface first . It sets rx and tx offloads in dev_conf structure as (DEV_RX_OFFLOAD_CHECKSUM | DEV_RX_OFFLOAD_JUMBO_FRAME )

and (DEV_TX_OFFLOAD_UDP_CKSUM | DEV_TX_OFFLOAD_TCP_CKSUM | DEV_TX_OFFLOAD_IPV4_CKSUM) respectively.
Then the application invokes rte_eth_dev_configure to setup bond. This causes some conditions such as below to fail In DPDK 19.11 :

        if ((dev_conf->rxmode.offloads & dev_info.rx_offload_capa) !=
             dev_conf->rxmode.offloads) {
                RTE_ETHDEV_LOG(ERR,
                        "Ethdev port_id=%u requested
                        Rx offloads 0x%"PRIx64" doesn't match Rx     offloads "
                        "capabilities 0x%"PRIx64" in %s()\n",
                        port_id, dev_conf->rxmode.offloads,
                        dev_info.rx_offload_capa,
                        __func__);
            Return -EINVAL;
        }
        if ((dev_conf->txmode.offloads & dev_info.tx_offload_capa) !=
             dev_conf->txmode.offloads) {
                RTE_ETHDEV_LOG(ERR,
                        "Ethdev port_id=%u requested Tx offloads
                       0x%"PRIx64" doesn't match Tx offloads "
                        "capabilities 0x%"PRIx64" in %s()\n",
                        port_id, dev_conf->txmode.offloads,
                        dev_info.tx_offload_capa,
                        __func__);
             Return -EINVAL;
        }
       Since no slaves are configured yet, the offloads in dev_info structure of bond are set to 0.Hence there is a mismatch between dev_conf structure whose offloads are set in DPDK
       application and dev_info structure in which all the values 0.

         Finally this causes bond and slave driver setup to fail. How can this issue be fixed ?

Thanks and Regards,
Nandini




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