[PATCH v2 2/5] net/hns3: support setting and querying RSS hash function

[Jie Hai <haijie1@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

Support setting and querying RSS hash function by ethdev ops.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/net/hns3/hns3_rss.c | 47 +++++++++++++++++++++----------------
 1 file changed, 27 insertions(+), 20 deletions(-)

diff --git a/drivers/net/hns3/hns3_rss.c b/drivers/net/hns3/hns3_rss.c
index 6126512bd780..c8346d43d15c 100644
--- a/drivers/net/hns3/hns3_rss.c
+++ b/drivers/net/hns3/hns3_rss.c
@@ -646,14 +646,14 @@ hns3_dev_rss_hash_update(struct rte_eth_dev *dev,
 	if (ret)
 		goto set_tuple_fail;
 
-	if (key) {
-		ret = hns3_rss_set_algo_key(hw, hw->rss_info.hash_algo,
-					    key, hw->rss_key_size);
-		if (ret)
-			goto set_algo_key_fail;
-		/* Update the shadow RSS key with user specified */
+	ret = hns3_update_rss_algo_key(hw, rss_conf->func, key, key_len);
+	if (ret != 0)
+		goto set_algo_key_fail;
+
+	if (rss_conf->func != RTE_ETH_HASH_FUNCTION_DEFAULT)
+		hw->rss_info.hash_algo = hns3_hash_func_map[rss_conf->func];
+	if (key != NULL)
 		memcpy(hw->rss_info.key, key, hw->rss_key_size);
-	}
 	hw->rss_info.rss_hf = rss_hf;
 	rte_spinlock_unlock(&hw->lock);
 
@@ -769,7 +769,13 @@ int
 hns3_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 			   struct rte_eth_rss_conf *rss_conf)
 {
+	const uint8_t hash_func_map[] = {
+		[HNS3_RSS_HASH_ALGO_TOEPLITZ] = RTE_ETH_HASH_FUNCTION_TOEPLITZ,
+		[HNS3_RSS_HASH_ALGO_SIMPLE] = RTE_ETH_HASH_FUNCTION_SIMPLE_XOR,
+		[HNS3_RSS_HASH_ALGO_SYMMETRIC_TOEP] = RTE_ETH_HASH_FUNCTION_SYMMETRIC_TOEPLITZ,
+	};
 	struct hns3_adapter *hns = dev->data->dev_private;
+	uint8_t rss_key[HNS3_RSS_KEY_SIZE_MAX] = {0};
 	struct hns3_hw *hw = &hns->hw;
 	uint8_t hash_algo;
 	int ret;
@@ -777,26 +783,27 @@ hns3_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 	rte_spinlock_lock(&hw->lock);
 	ret = hns3_rss_hash_get_rss_hf(hw, &rss_conf->rss_hf);
 	if (ret != 0) {
+		rte_spinlock_unlock(&hw->lock);
 		hns3_err(hw, "obtain hash tuples failed, ret = %d", ret);
-		goto out;
+		return ret;
+	}
+
+	ret = hns3_rss_get_algo_key(hw, &hash_algo, rss_key, hw->rss_key_size);
+	if (ret != 0) {
+		rte_spinlock_unlock(&hw->lock);
+		hns3_err(hw, "obtain hash algo and key failed, ret = %d", ret);
+		return ret;
 	}
+	rte_spinlock_unlock(&hw->lock);
 
-	/* Get the RSS Key required by the user */
+	/* Get the RSS Key if user required. */
 	if (rss_conf->rss_key && rss_conf->rss_key_len >= hw->rss_key_size) {
-		ret = hns3_rss_get_algo_key(hw, &hash_algo, rss_conf->rss_key,
-					    hw->rss_key_size);
-		if (ret != 0) {
-			hns3_err(hw, "obtain hash algo and key failed, ret = %d",
-				 ret);
-			goto out;
-		}
+		memcpy(rss_conf->rss_key, rss_key, hw->rss_key_size);
 		rss_conf->rss_key_len = hw->rss_key_size;
 	}
+	rss_conf->func = hash_func_map[hash_algo];
 
-out:
-	rte_spinlock_unlock(&hw->lock);
-
-	return ret;
+	return 0;
 }
 
 /*
-- 
2.33.0