net/hns3: refactor flow checks into own functions

Here moves some judgement conditions to a separated function
for parsing IPv4 hdr and TCP hdr in hns3_parse_normal function.
Also, move the check of the selected input tuple of RSS to a
separated functions named hns3_rss_input_tuple_supported
in order to enhance scalability and complexity.

Signed-off-by: Lijun Ou <oulijun@huawei.com>

diff --git a/drivers/net/hns3/hns3_flow.c b/drivers/net/hns3/hns3_flow.c
index f303df4..889fa2f 100644 (file)
--- a/drivers/net/hns3/hns3_flow.c
+++ b/drivers/net/hns3/hns3_flow.c
@@ -525,6 +525,17 @@ hns3_parse_vlan(const struct rte_flow_item *item, struct hns3_fdir_rule *rule,
        return 0;
 }
 
+static bool
+hns3_check_ipv4_mask_supported(const struct rte_flow_item_ipv4 *ipv4_mask)
+{
+       if (ipv4_mask->hdr.total_length || ipv4_mask->hdr.packet_id ||
+           ipv4_mask->hdr.fragment_offset || ipv4_mask->hdr.time_to_live ||
+           ipv4_mask->hdr.hdr_checksum)
+               return false;
+
+       return true;
+}
+
 static int
 hns3_parse_ipv4(const struct rte_flow_item *item, struct hns3_fdir_rule *rule,
                struct rte_flow_error *error)
@@ -546,11 +557,7 @@ hns3_parse_ipv4(const struct rte_flow_item *item, struct hns3_fdir_rule *rule,
 
        if (item->mask) {
                ipv4_mask = item->mask;
-               if (ipv4_mask->hdr.total_length ||
-                   ipv4_mask->hdr.packet_id ||
-                   ipv4_mask->hdr.fragment_offset ||
-                   ipv4_mask->hdr.time_to_live ||
-                   ipv4_mask->hdr.hdr_checksum) {
+               if (!hns3_check_ipv4_mask_supported(ipv4_mask)) {
                        return rte_flow_error_set(error, EINVAL,
                                                  RTE_FLOW_ERROR_TYPE_ITEM_MASK,
                                                  item,
@@ -648,6 +655,18 @@ hns3_parse_ipv6(const struct rte_flow_item *item, struct hns3_fdir_rule *rule,
        return 0;
 }
 
+static bool
+hns3_check_tcp_mask_supported(const struct rte_flow_item_tcp *tcp_mask)
+{
+       if (tcp_mask->hdr.sent_seq || tcp_mask->hdr.recv_ack ||
+           tcp_mask->hdr.data_off || tcp_mask->hdr.tcp_flags ||
+           tcp_mask->hdr.rx_win || tcp_mask->hdr.cksum ||
+           tcp_mask->hdr.tcp_urp)
+               return false;
+
+       return true;
+}
+
 static int
 hns3_parse_tcp(const struct rte_flow_item *item, struct hns3_fdir_rule *rule,
               struct rte_flow_error *error)
@@ -670,10 +689,7 @@ hns3_parse_tcp(const struct rte_flow_item *item, struct hns3_fdir_rule *rule,
 
        if (item->mask) {
                tcp_mask = item->mask;
-               if (tcp_mask->hdr.sent_seq || tcp_mask->hdr.recv_ack ||
-                   tcp_mask->hdr.data_off || tcp_mask->hdr.tcp_flags ||
-                   tcp_mask->hdr.rx_win || tcp_mask->hdr.cksum ||
-                   tcp_mask->hdr.tcp_urp) {
+               if (!hns3_check_tcp_mask_supported(tcp_mask)) {
                        return rte_flow_error_set(error, EINVAL,
                                                  RTE_FLOW_ERROR_TYPE_ITEM_MASK,
                                                  item,
@@ -1328,6 +1344,28 @@ hns3_rss_conf_copy(struct hns3_rss_conf *out,
        return 0;
 }
 
+static bool
+hns3_rss_input_tuple_supported(struct hns3_hw *hw,
+                              const struct rte_flow_action_rss *rss)
+{
+       /*
+        * For IP packet, it is not supported to use src/dst port fields to RSS
+        * hash for the following packet types.
+        * - IPV4 FRAG | IPV4 NONFRAG | IPV6 FRAG | IPV6 NONFRAG
+        * Besides, for Kunpeng920, the NIC HW is not supported to use src/dst
+        * port fields to RSS hash for IPV6 SCTP packet type. However, the
+        * Kunpeng930 and future kunpeng series support to use src/dst port
+        * fields to RSS hash for IPv6 SCTP packet type.
+        */
+       if (rss->types & (ETH_RSS_L4_DST_ONLY | ETH_RSS_L4_SRC_ONLY) &&
+           (rss->types & ETH_RSS_IP ||
+           (!hw->rss_info.ipv6_sctp_offload_supported &&
+           rss->types & ETH_RSS_NONFRAG_IPV6_SCTP)))
+               return false;
+
+       return true;
+}
+
 /*
  * This function is used to parse rss action validatation.
  */
@@ -1386,18 +1424,7 @@ hns3_parse_rss_filter(struct rte_eth_dev *dev,
                                          RTE_FLOW_ERROR_TYPE_ACTION_CONF, act,
                                          "RSS hash key must be exactly 40 bytes");
 
-       /*
-        * For Kunpeng920 and Kunpeng930 NIC hardware, it is not supported to
-        * use dst port/src port fields to RSS hash for the following packet
-        * types.
-        * - IPV4 FRAG | IPV4 NONFRAG | IPV6 FRAG | IPV6 NONFRAG
-        * Besides, for Kunpeng920, The NIC hardware is not supported to use
-        * src/dst port fields to RSS hash for IPV6 SCTP packet type.
-        */
-       if (rss->types & (ETH_RSS_L4_DST_ONLY | ETH_RSS_L4_SRC_ONLY) &&
-          (rss->types & ETH_RSS_IP ||
-          (!hw->rss_info.ipv6_sctp_offload_supported &&
-          rss->types & ETH_RSS_NONFRAG_IPV6_SCTP)))
+       if (!hns3_rss_input_tuple_supported(hw, rss))
                return rte_flow_error_set(error, EINVAL,
                                          RTE_FLOW_ERROR_TYPE_ACTION_CONF,
                                          &rss->types,