+int
+i40e_rss_conf_init(struct i40e_rte_flow_rss_conf *out,
+ const struct rte_flow_action_rss *in)
+{
+ if (in->key_len > RTE_DIM(out->key) ||
+ in->queue_num > RTE_DIM(out->queue))
+ return -EINVAL;
+ out->conf = (struct rte_flow_action_rss){
+ .func = in->func,
+ .level = in->level,
+ .types = in->types,
+ .key_len = in->key_len,
+ .queue_num = in->queue_num,
+ .key = memcpy(out->key, in->key, in->key_len),
+ .queue = memcpy(out->queue, in->queue,
+ sizeof(*in->queue) * in->queue_num),
+ };
+ return 0;
+}
+
+int
+i40e_action_rss_same(const struct rte_flow_action_rss *comp,
+ const struct rte_flow_action_rss *with)
+{
+ return (comp->func == with->func &&
+ comp->level == with->level &&
+ comp->types == with->types &&
+ comp->key_len == with->key_len &&
+ comp->queue_num == with->queue_num &&
+ !memcmp(comp->key, with->key, with->key_len) &&
+ !memcmp(comp->queue, with->queue,
+ sizeof(*with->queue) * with->queue_num));
+}
+
+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 = {
+ .rss_key = conf->conf.key_len ?
+ (void *)(uintptr_t)conf->conf.key : NULL,
+ .rss_key_len = conf->conf.key_len,
+ .rss_hf = conf->conf.types,
+ };
+ struct i40e_rte_flow_rss_conf *rss_info = &pf->rss_info;
+
+ if (!add) {
+ if (i40e_action_rss_same(&rss_info->conf, &conf->conf)) {
+ i40e_pf_disable_rss(pf);
+ memset(rss_info, 0,
+ sizeof(struct i40e_rte_flow_rss_conf));
+ return 0;
+ }
+ return -EINVAL;
+ }
+
+ if (rss_info->conf.queue_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->conf.queue_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->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);
+ }
+
+ i40e_hw_rss_hash_set(pf, &rss_conf);
+
+ if (i40e_rss_conf_init(rss_info, &conf->conf))
+ return -EINVAL;
+
+ return 0;
+}
+