[Patch v4 07/17] net/mana: add function to configure RSS

[longli@linuxonhyperv.com]

From: Long Li <longli@microsoft.com>

Currently this PMD supports RSS configuration when the device is stopped.
Configuring RSS in running state will be supported in the future.

Signed-off-by: Long Li <longli@microsoft.com>
---
 doc/guides/nics/features/mana.ini |  1 +
 drivers/net/mana/mana.c           | 61 +++++++++++++++++++++++++++++++
 drivers/net/mana/mana.h           |  1 +
 3 files changed, 63 insertions(+)

diff --git a/doc/guides/nics/features/mana.ini b/doc/guides/nics/features/mana.ini
index 566b3e8770..a59c21cc10 100644
--- a/doc/guides/nics/features/mana.ini
+++ b/doc/guides/nics/features/mana.ini
@@ -8,6 +8,7 @@ Link status          = P
 Linux                = Y
 Multiprocess aware   = Y
 Removal event        = Y
+RSS hash             = Y
 Speed capabilities   = P
 Usage doc            = Y
 x86-64               = Y
diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c
index e1550b3c08..cb136f24c1 100644
--- a/drivers/net/mana/mana.c
+++ b/drivers/net/mana/mana.c
@@ -211,6 +211,65 @@ static const uint32_t *mana_supported_ptypes(struct rte_eth_dev *dev __rte_unuse
 	return ptypes;
 }
 
+static int mana_rss_hash_update(struct rte_eth_dev *dev,
+				struct rte_eth_rss_conf *rss_conf)
+{
+	struct mana_priv *priv = dev->data->dev_private;
+
+	/* Currently can only update RSS hash when device is stopped */
+	if (dev->data->dev_started) {
+		DRV_LOG(ERR, "Can't update RSS after device has started");
+		return -ENODEV;
+	}
+
+	if (rss_conf->rss_hf & ~BNIC_ETH_RSS_SUPPORT) {
+		DRV_LOG(ERR, "Port %u invalid RSS HF 0x%" PRIx64,
+			dev->data->port_id, rss_conf->rss_hf);
+		return -EINVAL;
+	}
+
+	if (rss_conf->rss_key && rss_conf->rss_key_len) {
+		if (rss_conf->rss_key_len != TOEPLITZ_HASH_KEY_SIZE_IN_BYTES) {
+			DRV_LOG(ERR, "Port %u key len must be %u long",
+				dev->data->port_id,
+				TOEPLITZ_HASH_KEY_SIZE_IN_BYTES);
+			return -EINVAL;
+		}
+
+		priv->rss_conf.rss_key_len = rss_conf->rss_key_len;
+		priv->rss_conf.rss_key =
+			rte_zmalloc("mana_rss", rss_conf->rss_key_len,
+				    RTE_CACHE_LINE_SIZE);
+		if (!priv->rss_conf.rss_key)
+			return -ENOMEM;
+		memcpy(priv->rss_conf.rss_key, rss_conf->rss_key,
+		       rss_conf->rss_key_len);
+	}
+	priv->rss_conf.rss_hf = rss_conf->rss_hf;
+
+	return 0;
+}
+
+static int mana_rss_hash_conf_get(struct rte_eth_dev *dev,
+				  struct rte_eth_rss_conf *rss_conf)
+{
+	struct mana_priv *priv = dev->data->dev_private;
+
+	if (!rss_conf)
+		return -EINVAL;
+
+	if (rss_conf->rss_key &&
+	    rss_conf->rss_key_len >= priv->rss_conf.rss_key_len) {
+		memcpy(rss_conf->rss_key, priv->rss_conf.rss_key,
+		       priv->rss_conf.rss_key_len);
+	}
+
+	rss_conf->rss_key_len = priv->rss_conf.rss_key_len;
+	rss_conf->rss_hf = priv->rss_conf.rss_hf;
+
+	return 0;
+}
+
 static int mana_dev_link_update(struct rte_eth_dev *dev,
 				int wait_to_complete __rte_unused)
 {
@@ -232,6 +291,8 @@ const struct eth_dev_ops mana_dev_ops = {
 	.dev_close		= mana_dev_close,
 	.dev_infos_get		= mana_dev_info_get,
 	.dev_supported_ptypes_get = mana_supported_ptypes,
+	.rss_hash_update	= mana_rss_hash_update,
+	.rss_hash_conf_get	= mana_rss_hash_conf_get,
 	.link_update		= mana_dev_link_update,
 };
 
diff --git a/drivers/net/mana/mana.h b/drivers/net/mana/mana.h
index f97eed2e81..33f68b3d1b 100644
--- a/drivers/net/mana/mana.h
+++ b/drivers/net/mana/mana.h
@@ -72,6 +72,7 @@ struct mana_priv {
 	uint8_t ind_table_key[40];
 	struct ibv_qp *rwq_qp;
 	void *db_page;
+	struct rte_eth_rss_conf rss_conf;
 	struct rte_intr_handle *intr_handle;
 	int max_rx_queues;
 	int max_tx_queues;
-- 
2.17.1