+/**
+ * This function is used to do configuration i40e existing RSS with rte_flow.
+ * It also enable queue region configuration using flow API for i40e.
+ * pattern can be used indicate what parameters will be include in flow,
+ * like user_priority or flowtype for queue region or HASH function for RSS.
+ * Action is used to transmit parameter like queue index and HASH
+ * function for RSS, or flowtype for queue region configuration.
+ * For example:
+ * pattern:
+ * Case 1: only ETH, indicate flowtype for queue region will be parsed.
+ * Case 2: only VLAN, indicate user_priority for queue region will be parsed.
+ * Case 3: none, indicate RSS related will be parsed in action.
+ * Any pattern other the ETH or VLAN will be treated as invalid except END.
+ * So, pattern choice is depened on the purpose of configuration of
+ * that flow.
+ * action:
+ * action RSS will be uaed to transmit valid parameter with
+ * struct rte_flow_action_rss for all the 3 case.
+ */
+static int
+i40e_flow_parse_rss_pattern(__rte_unused struct rte_eth_dev *dev,
+ const struct rte_flow_item *pattern,
+ struct rte_flow_error *error,
+ uint8_t *action_flag,
+ struct i40e_queue_regions *info)
+{
+ const struct rte_flow_item_vlan *vlan_spec, *vlan_mask;
+ const struct rte_flow_item *item = pattern;
+ enum rte_flow_item_type item_type;
+
+ if (item->type == RTE_FLOW_ITEM_TYPE_END)
+ return 0;
+
+ for (; item->type != RTE_FLOW_ITEM_TYPE_END; item++) {
+ if (item->last) {
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ITEM,
+ item,
+ "Not support range");
+ return -rte_errno;
+ }
+ item_type = item->type;
+ switch (item_type) {
+ case RTE_FLOW_ITEM_TYPE_ETH:
+ *action_flag = 1;
+ break;
+ case RTE_FLOW_ITEM_TYPE_VLAN:
+ vlan_spec = item->spec;
+ vlan_mask = item->mask;
+ if (vlan_spec && vlan_mask) {
+ if (vlan_mask->tci ==
+ rte_cpu_to_be_16(I40E_TCI_MASK)) {
+ info->region[0].user_priority[0] =
+ (vlan_spec->tci >> 13) & 0x7;
+ info->region[0].user_priority_num = 1;
+ info->queue_region_number = 1;
+ *action_flag = 0;
+ }
+ }
+ break;
+ default:
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ITEM,
+ item,
+ "Not support range");
+ return -rte_errno;
+ }
+ }
+
+ return 0;
+}
+
+static int
+i40e_flow_parse_rss_action(struct rte_eth_dev *dev,
+ const struct rte_flow_action *actions,
+ struct rte_flow_error *error,
+ uint8_t action_flag,
+ struct i40e_queue_regions *conf_info,
+ union i40e_filter_t *filter)
+{
+ const struct rte_flow_action *act;
+ const struct rte_flow_action_rss *rss;
+ struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+ struct i40e_queue_regions *info = &pf->queue_region;
+ struct i40e_rte_flow_rss_conf *rss_config =
+ &filter->rss_conf;
+ struct i40e_rte_flow_rss_conf *rss_info = &pf->rss_info;
+ uint16_t i, j, n, tmp;
+ uint32_t index = 0;
+ uint64_t hf_bit = 1;
+
+ NEXT_ITEM_OF_ACTION(act, actions, index);
+ rss = act->conf;
+
+ /**
+ * rss only supports forwarding,
+ * check if the first not void action is RSS.
+ */
+ if (act->type != RTE_FLOW_ACTION_TYPE_RSS) {
+ memset(rss_config, 0, sizeof(struct i40e_rte_flow_rss_conf));
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ act, "Not supported action.");
+ return -rte_errno;
+ }
+
+ if (action_flag) {
+ for (n = 0; n < 64; n++) {
+ if (rss->rss_conf->rss_hf & (hf_bit << n)) {
+ conf_info->region[0].hw_flowtype[0] = n;
+ conf_info->region[0].flowtype_num = 1;
+ conf_info->queue_region_number = 1;
+ break;
+ }
+ }
+ }
+
+ for (n = 0; n < conf_info->queue_region_number; n++) {
+ if (conf_info->region[n].user_priority_num ||
+ conf_info->region[n].flowtype_num) {
+ if (!((rte_is_power_of_2(rss->num)) &&
+ rss->num <= 64)) {
+ PMD_DRV_LOG(ERR, "The region sizes should be any of the following values: 1, 2, 4, 8, 16, 32, 64 as long as the "
+ "total number of queues do not exceed the VSI allocation");
+ return -rte_errno;
+ }
+
+ if (conf_info->region[n].user_priority[n] >=
+ I40E_MAX_USER_PRIORITY) {
+ PMD_DRV_LOG(ERR, "the user priority max index is 7");
+ return -rte_errno;
+ }
+
+ if (conf_info->region[n].hw_flowtype[n] >=
+ I40E_FILTER_PCTYPE_MAX) {
+ PMD_DRV_LOG(ERR, "the hw_flowtype or PCTYPE max index is 63");
+ return -rte_errno;
+ }
+
+ if (rss_info->num < rss->num ||
+ rss_info->queue[0] < rss->queue[0] ||
+ (rss->queue[0] + rss->num >
+ rss_info->num + rss_info->queue[0])) {
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ act,
+ "no valid queues");
+ return -rte_errno;
+ }
+
+ for (i = 0; i < info->queue_region_number; i++) {
+ if (info->region[i].queue_num == rss->num &&
+ info->region[i].queue_start_index ==
+ rss->queue[0])
+ break;
+ }
+
+ if (i == info->queue_region_number) {
+ if (i > I40E_REGION_MAX_INDEX) {
+ PMD_DRV_LOG(ERR, "the queue region max index is 7");
+ return -rte_errno;
+ }
+
+ info->region[i].queue_num =
+ rss->num;
+ info->region[i].queue_start_index =
+ rss->queue[0];
+ info->region[i].region_id =
+ info->queue_region_number;
+
+ j = info->region[i].user_priority_num;
+ tmp = conf_info->region[n].user_priority[0];
+ if (conf_info->region[n].user_priority_num) {
+ info->region[i].user_priority[j] = tmp;
+ info->region[i].user_priority_num++;
+ }
+
+ j = info->region[i].flowtype_num;
+ tmp = conf_info->region[n].hw_flowtype[0];
+ if (conf_info->region[n].flowtype_num) {
+ info->region[i].hw_flowtype[j] = tmp;
+ info->region[i].flowtype_num++;
+ }
+ info->queue_region_number++;
+ } else {
+ j = info->region[i].user_priority_num;
+ tmp = conf_info->region[n].user_priority[0];
+ if (conf_info->region[n].user_priority_num) {
+ info->region[i].user_priority[j] = tmp;
+ info->region[i].user_priority_num++;
+ }
+
+ j = info->region[i].flowtype_num;
+ tmp = conf_info->region[n].hw_flowtype[0];
+ if (conf_info->region[n].flowtype_num) {
+ info->region[i].hw_flowtype[j] = tmp;
+ info->region[i].flowtype_num++;
+ }
+ }
+ }
+
+ rss_config->queue_region_conf = TRUE;
+ }
+
+ if (rss_config->queue_region_conf)
+ return 0;
+
+ if (!rss || !rss->num) {
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ act,
+ "no valid queues");
+ return -rte_errno;
+ }
+
+ for (n = 0; n < rss->num; n++) {
+ if (rss->queue[n] >= dev->data->nb_rx_queues) {
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ act,
+ "queue id > max number of queues");
+ return -rte_errno;
+ }
+ }
+ if (rss->rss_conf)
+ rss_config->rss_conf = *rss->rss_conf;
+ else
+ rss_config->rss_conf.rss_hf =
+ pf->adapter->flow_types_mask;
+
+ for (n = 0; n < rss->num; ++n)
+ rss_config->queue[n] = rss->queue[n];
+ rss_config->num = rss->num;
+ index++;
+
+ /* check if the next not void action is END */
+ NEXT_ITEM_OF_ACTION(act, actions, index);
+ if (act->type != RTE_FLOW_ACTION_TYPE_END) {
+ memset(rss_config, 0, sizeof(struct i40e_rte_flow_rss_conf));
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ act, "Not supported action.");
+ return -rte_errno;
+ }
+ rss_config->queue_region_conf = FALSE;
+
+ return 0;
+}
+
+static int
+i40e_parse_rss_filter(struct rte_eth_dev *dev,
+ const struct rte_flow_attr *attr,
+ const struct rte_flow_item pattern[],
+ const struct rte_flow_action actions[],
+ union i40e_filter_t *filter,
+ struct rte_flow_error *error)
+{
+ int ret;
+ struct i40e_queue_regions info;
+ uint8_t action_flag = 0;
+
+ memset(&info, 0, sizeof(struct i40e_queue_regions));
+
+ ret = i40e_flow_parse_rss_pattern(dev, pattern,
+ error, &action_flag, &info);
+ if (ret)
+ return ret;
+
+ ret = i40e_flow_parse_rss_action(dev, actions, error,
+ action_flag, &info, filter);
+ if (ret)
+ return ret;
+
+ ret = i40e_flow_parse_attr(attr, error);
+ if (ret)
+ return ret;
+
+ cons_filter_type = RTE_ETH_FILTER_HASH;
+
+ return 0;
+}
+
+static int
+i40e_config_rss_filter_set(struct rte_eth_dev *dev,
+ struct i40e_rte_flow_rss_conf *conf)
+{
+ struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+ struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+ int ret;
+
+ if (conf->queue_region_conf) {
+ ret = i40e_flush_queue_region_all_conf(dev, hw, pf, 1);
+ conf->queue_region_conf = 0;
+ } else {
+ ret = i40e_config_rss_filter(pf, conf, 1);
+ }
+ return ret;
+}
+
+static int
+i40e_config_rss_filter_del(struct rte_eth_dev *dev,
+ struct i40e_rte_flow_rss_conf *conf)
+{
+ struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+ struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+ i40e_flush_queue_region_all_conf(dev, hw, pf, 0);
+
+ i40e_config_rss_filter(pf, conf, 0);
+ return 0;
+}
+