+static int enic_rss_conf_valid(struct enic *enic,
+ struct rte_eth_rss_conf *rss_conf)
+{
+ /* RSS is disabled per VIC settings. Ignore rss_conf. */
+ if (enic->flow_type_rss_offloads == 0)
+ return 0;
+ if (rss_conf->rss_key != NULL &&
+ rss_conf->rss_key_len != ENIC_RSS_HASH_KEY_SIZE) {
+ dev_err(enic, "Given rss_key is %d bytes, it must be %d\n",
+ rss_conf->rss_key_len, ENIC_RSS_HASH_KEY_SIZE);
+ return -EINVAL;
+ }
+ if (rss_conf->rss_hf != 0 &&
+ (rss_conf->rss_hf & enic->flow_type_rss_offloads) == 0) {
+ dev_err(enic, "Given rss_hf contains none of the supported"
+ " types\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* Set hash type and key according to rss_conf */
+int enic_set_rss_conf(struct enic *enic, struct rte_eth_rss_conf *rss_conf)
+{
+ struct rte_eth_dev *eth_dev;
+ uint64_t rss_hf;
+ u8 rss_hash_type;
+ u8 rss_enable;
+ int ret;
+
+ RTE_ASSERT(rss_conf != NULL);
+ ret = enic_rss_conf_valid(enic, rss_conf);
+ if (ret) {
+ dev_err(enic, "RSS configuration (rss_conf) is invalid\n");
+ return ret;
+ }
+
+ eth_dev = enic->rte_dev;
+ rss_hash_type = 0;
+ rss_hf = rss_conf->rss_hf & enic->flow_type_rss_offloads;
+ if (enic->rq_count > 1 &&
+ (eth_dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG) &&
+ rss_hf != 0) {
+ rss_enable = 1;
+ if (rss_hf & (ETH_RSS_IPV4 | ETH_RSS_FRAG_IPV4 |
+ ETH_RSS_NONFRAG_IPV4_OTHER))
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_IPV4;
+ if (rss_hf & ETH_RSS_NONFRAG_IPV4_TCP)
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV4;
+ if (rss_hf & ETH_RSS_NONFRAG_IPV4_UDP) {
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_UDP_IPV4;
+ if (ENIC_SETTING(enic, RSSHASH_UDP_WEAK)) {
+ /*
+ * 'TCP' is not a typo. The "weak" version of
+ * UDP RSS requires both the TCP and UDP bits
+ * be set. It does enable TCP RSS as well.
+ */
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV4;
+ }
+ }
+ if (rss_hf & (ETH_RSS_IPV6 | ETH_RSS_IPV6_EX |
+ ETH_RSS_FRAG_IPV6 | ETH_RSS_NONFRAG_IPV6_OTHER))
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_IPV6;
+ if (rss_hf & (ETH_RSS_NONFRAG_IPV6_TCP | ETH_RSS_IPV6_TCP_EX))
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
+ if (rss_hf & (ETH_RSS_NONFRAG_IPV6_UDP | ETH_RSS_IPV6_UDP_EX)) {
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_UDP_IPV6;
+ if (ENIC_SETTING(enic, RSSHASH_UDP_WEAK))
+ rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
+ }
+ } else {
+ rss_enable = 0;
+ rss_hf = 0;
+ }
+
+ /* Set the hash key if provided */
+ if (rss_enable && rss_conf->rss_key) {
+ ret = enic_set_rsskey(enic, rss_conf->rss_key);
+ if (ret) {
+ dev_err(enic, "Failed to set RSS key\n");
+ return ret;
+ }
+ }
+
+ ret = enic_set_niccfg(enic, ENIC_RSS_DEFAULT_CPU, rss_hash_type,
+ ENIC_RSS_HASH_BITS, ENIC_RSS_BASE_CPU,
+ rss_enable);
+ if (!ret) {
+ enic->rss_hf = rss_hf;
+ enic->rss_hash_type = rss_hash_type;
+ enic->rss_enable = rss_enable;
+ }
+ return 0;
+}
+
+int enic_set_vlan_strip(struct enic *enic)
+{
+ /*
+ * Unfortunately, VLAN strip on/off and RSS on/off are configured
+ * together. So, re-do niccfg, preserving the current RSS settings.
+ */
+ return enic_set_niccfg(enic, ENIC_RSS_DEFAULT_CPU, enic->rss_hash_type,
+ ENIC_RSS_HASH_BITS, ENIC_RSS_BASE_CPU,
+ enic->rss_enable);
+}
+