+int
+i40e_config_rss_filter(struct i40e_pf *pf,
+ struct i40e_rte_flow_rss_conf *conf, bool add)
+{
+ struct i40e_hw *hw = I40E_PF_TO_HW(pf);
+ uint32_t i, lut = 0;
+ uint16_t j, num;
+ struct rte_eth_rss_conf rss_conf = conf->rss_conf;
+ struct i40e_rte_flow_rss_conf *rss_info = &pf->rss_info;
+
+ if (!add) {
+ if (memcmp(conf, rss_info,
+ sizeof(struct i40e_rte_flow_rss_conf)) == 0) {
+ i40e_pf_disable_rss(pf);
+ memset(rss_info, 0,
+ sizeof(struct i40e_rte_flow_rss_conf));
+ return 0;
+ }
+ return -EINVAL;
+ }
+
+ if (rss_info->num)
+ return -EINVAL;
+
+ /* If both VMDQ and RSS enabled, not all of PF queues are configured.
+ * It's necessary to calculate the actual PF queues that are configured.
+ */
+ if (pf->dev_data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_VMDQ_FLAG)
+ num = i40e_pf_calc_configured_queues_num(pf);
+ else
+ num = pf->dev_data->nb_rx_queues;
+
+ num = RTE_MIN(num, conf->num);
+ PMD_DRV_LOG(INFO, "Max of contiguous %u PF queues are configured",
+ num);
+
+ if (num == 0) {
+ PMD_DRV_LOG(ERR, "No PF queues are configured to enable RSS");
+ return -ENOTSUP;
+ }
+
+ /* Fill in redirection table */
+ for (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {
+ if (j == num)
+ j = 0;
+ lut = (lut << 8) | (conf->queue[j] & ((0x1 <<
+ hw->func_caps.rss_table_entry_width) - 1));
+ if ((i & 3) == 3)
+ I40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >> 2), lut);
+ }
+
+ if ((rss_conf.rss_hf & pf->adapter->flow_types_mask) == 0) {
+ i40e_pf_disable_rss(pf);
+ return 0;
+ }
+ if (rss_conf.rss_key == NULL || rss_conf.rss_key_len <
+ (I40E_PFQF_HKEY_MAX_INDEX + 1) * sizeof(uint32_t)) {
+ /* Random default keys */
+ static uint32_t rss_key_default[] = {0x6b793944,
+ 0x23504cb5, 0x5bea75b6, 0x309f4f12, 0x3dc0a2b8,
+ 0x024ddcdf, 0x339b8ca0, 0x4c4af64a, 0x34fac605,
+ 0x55d85839, 0x3a58997d, 0x2ec938e1, 0x66031581};
+
+ rss_conf.rss_key = (uint8_t *)rss_key_default;
+ rss_conf.rss_key_len = (I40E_PFQF_HKEY_MAX_INDEX + 1) *
+ sizeof(uint32_t);
+ }
+
+ return i40e_hw_rss_hash_set(pf, &rss_conf);
+
+ rte_memcpy(rss_info,
+ conf, sizeof(struct i40e_rte_flow_rss_conf));
+
+ return 0;
+}
+