+/**
+ * Check whether a specific offloading capability
+ * is supported by a sub_device.
+ *
+ * @return
+ * 0: all requested capabilities are supported by the sub_device
+ * positive value: This flag at least is not supported by the sub_device
+ */
+static int
+fs_port_offload_validate(struct rte_eth_dev *dev,
+ struct sub_device *sdev)
+{
+ struct rte_eth_dev_info infos = {0};
+ struct rte_eth_conf *cf;
+ uint32_t cap;
+
+ cf = &dev->data->dev_conf;
+ SUBOPS(sdev, dev_infos_get)(ETH(sdev), &infos);
+ /* RX capabilities */
+ cap = infos.rx_offload_capa;
+ if (cf->rxmode.hw_vlan_strip &&
+ ((cap & DEV_RX_OFFLOAD_VLAN_STRIP) == 0)) {
+ WARN("VLAN stripping offload requested but not supported by sub_device %d",
+ SUB_ID(sdev));
+ return DEV_RX_OFFLOAD_VLAN_STRIP;
+ }
+ if (cf->rxmode.hw_ip_checksum &&
+ ((cap & (DEV_RX_OFFLOAD_IPV4_CKSUM |
+ DEV_RX_OFFLOAD_UDP_CKSUM |
+ DEV_RX_OFFLOAD_TCP_CKSUM)) !=
+ (DEV_RX_OFFLOAD_IPV4_CKSUM |
+ DEV_RX_OFFLOAD_UDP_CKSUM |
+ DEV_RX_OFFLOAD_TCP_CKSUM))) {
+ WARN("IP checksum offload requested but not supported by sub_device %d",
+ SUB_ID(sdev));
+ return DEV_RX_OFFLOAD_IPV4_CKSUM |
+ DEV_RX_OFFLOAD_UDP_CKSUM |
+ DEV_RX_OFFLOAD_TCP_CKSUM;
+ }
+ if (cf->rxmode.enable_lro &&
+ ((cap & DEV_RX_OFFLOAD_TCP_LRO) == 0)) {
+ WARN("TCP LRO offload requested but not supported by sub_device %d",
+ SUB_ID(sdev));
+ return DEV_RX_OFFLOAD_TCP_LRO;
+ }
+ if (cf->rxmode.hw_vlan_extend &&
+ ((cap & DEV_RX_OFFLOAD_QINQ_STRIP) == 0)) {
+ WARN("Stacked VLAN stripping offload requested but not supported by sub_device %d",
+ SUB_ID(sdev));
+ return DEV_RX_OFFLOAD_QINQ_STRIP;
+ }
+ /* TX capabilities */
+ /* Nothing to do, no tx capa supported */
+ return 0;
+}
+
+/*
+ * Disable the dev_conf flag related to an offload capability flag
+ * within an ethdev configuration.
+ */
+static int
+fs_port_disable_offload(struct rte_eth_conf *cf,
+ uint32_t ol_cap)
+{
+ switch (ol_cap) {
+ case DEV_RX_OFFLOAD_VLAN_STRIP:
+ INFO("Disabling VLAN stripping offload");
+ cf->rxmode.hw_vlan_strip = 0;
+ break;
+ case DEV_RX_OFFLOAD_IPV4_CKSUM:
+ case DEV_RX_OFFLOAD_UDP_CKSUM:
+ case DEV_RX_OFFLOAD_TCP_CKSUM:
+ case (DEV_RX_OFFLOAD_IPV4_CKSUM |
+ DEV_RX_OFFLOAD_UDP_CKSUM |
+ DEV_RX_OFFLOAD_TCP_CKSUM):
+ INFO("Disabling IP checksum offload");
+ cf->rxmode.hw_ip_checksum = 0;
+ break;
+ case DEV_RX_OFFLOAD_TCP_LRO:
+ INFO("Disabling TCP LRO offload");
+ cf->rxmode.enable_lro = 0;
+ break;
+ case DEV_RX_OFFLOAD_QINQ_STRIP:
+ INFO("Disabling stacked VLAN stripping offload");
+ cf->rxmode.hw_vlan_extend = 0;
+ break;
+ default:
+ DEBUG("Unable to disable offload capability: %" PRIx32,
+ ol_cap);
+ return -1;
+ }
+ return 0;
+}
+