[PATCH] net/ice: fix DCF RSS hash update

[Mingjin Ye <mingjinx.ye@intel.com>]

Get rss hash configuration, rss_hf is always the default value.
The driver does nothing if the rss key is invalid during the rss
hash update.

This patch is get the current configuration of rss_hf. Extract
the update rss key code from ice_dcf_dev_rss_hash_update to
ice_dcf_set_rss_key and make it consistent with the pf behaviour.

Fixes: c223cadc9e5f ("net/ice: support RSS hash configuration in DCF mode")
Cc: stable@dpdk.org

Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
 drivers/net/intel/ice/ice_dcf_ethdev.c | 38 +++++++++++++++-----------
 1 file changed, 22 insertions(+), 16 deletions(-)

diff --git a/drivers/net/intel/ice/ice_dcf_ethdev.c b/drivers/net/intel/ice/ice_dcf_ethdev.c
index efff76afa8..accabd0ab9 100644
--- a/drivers/net/intel/ice/ice_dcf_ethdev.c
+++ b/drivers/net/intel/ice/ice_dcf_ethdev.c
@@ -1394,31 +1394,38 @@ ice_dcf_dev_rss_reta_query(struct rte_eth_dev *dev,
 }
 
 static int
-ice_dcf_dev_rss_hash_update(struct rte_eth_dev *dev,
-			struct rte_eth_rss_conf *rss_conf)
+ice_dcf_set_rss_key(struct ice_dcf_hw *hw, uint8_t *key, uint8_t key_len)
 {
-	struct ice_dcf_adapter *adapter = dev->data->dev_private;
-	struct ice_dcf_hw *hw = &adapter->real_hw;
-	int ret;
-
-	if (!(hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
-		return -ENOTSUP;
-
 	/* HENA setting, it is enabled by default, no change */
-	if (!rss_conf->rss_key || rss_conf->rss_key_len == 0) {
+	if (!key || key_len == 0) {
 		PMD_DRV_LOG(DEBUG, "No key to be configured");
 		return 0;
-	} else if (rss_conf->rss_key_len != hw->vf_res->rss_key_size) {
+	} else if (key_len != hw->vf_res->rss_key_size) {
 		PMD_DRV_LOG(ERR, "The size of hash key configured "
 			"(%d) doesn't match the size of hardware can "
-			"support (%d)", rss_conf->rss_key_len,
+			"support (%d)", key_len,
 			hw->vf_res->rss_key_size);
 		return -EINVAL;
 	}
 
-	rte_memcpy(hw->rss_key, rss_conf->rss_key, rss_conf->rss_key_len);
+	rte_memcpy(hw->rss_key, key, key_len);
+
+	return ice_dcf_configure_rss_key(hw);
+}
+
+static int
+ice_dcf_dev_rss_hash_update(struct rte_eth_dev *dev,
+			struct rte_eth_rss_conf *rss_conf)
+{
+	struct ice_dcf_adapter *adapter = dev->data->dev_private;
+	struct ice_dcf_hw *hw = &adapter->real_hw;
+	int ret;
+
+	if (!(hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
+		return -ENOTSUP;
 
-	ret = ice_dcf_configure_rss_key(hw);
+	/* set hash key */
+	ret = ice_dcf_set_rss_key(hw, rss_conf->rss_key, rss_conf->rss_key_len);
 	if (ret)
 		return ret;
 
@@ -1452,8 +1459,7 @@ ice_dcf_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 	if (!(hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
 		return -ENOTSUP;
 
-	/* Just set it to default value now. */
-	rss_conf->rss_hf = ICE_RSS_OFFLOAD_ALL;
+	rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
 
 	if (!rss_conf->rss_key)
 		return 0;
-- 
2.25.1