From: Remy Horton <remy.horton@intel.com>
Date: Tue, 10 Apr 2018 09:43:18 +0000 (+0100)
Subject: net/i40e: add Tx/Rx tuning parameters
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0ba52a330f85fe439ffea5901c7ada2323bfab4d;p=dpdk.git

net/i40e: add Tx/Rx tuning parameters

The optimal values of several transmission & reception related
parameters, such as burst sizes, descriptor ring sizes, and number
of queues, varies between different network interface devices. This
patch allows individual PMDs to specify preferred parameter values.

Signed-off-by: Remy Horton <remy.horton@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
---

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index f1e6c3d3d2..fcb97057f0 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -3296,15 +3296,42 @@ i40e_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		dev_info->max_tx_queues += dev_info->vmdq_queue_num;
 	}
 
-	if (I40E_PHY_TYPE_SUPPORT_40G(hw->phy.phy_types))
+	if (I40E_PHY_TYPE_SUPPORT_40G(hw->phy.phy_types)) {
 		/* For XL710 */
 		dev_info->speed_capa = ETH_LINK_SPEED_40G;
-	else if (I40E_PHY_TYPE_SUPPORT_25G(hw->phy.phy_types))
+		dev_info->default_rxportconf.nb_queues = 2;
+		dev_info->default_txportconf.nb_queues = 2;
+		if (dev->data->nb_rx_queues == 1)
+			dev_info->default_rxportconf.ring_size = 2048;
+		else
+			dev_info->default_rxportconf.ring_size = 1024;
+		if (dev->data->nb_tx_queues == 1)
+			dev_info->default_txportconf.ring_size = 1024;
+		else
+			dev_info->default_txportconf.ring_size = 512;
+
+	} else if (I40E_PHY_TYPE_SUPPORT_25G(hw->phy.phy_types)) {
 		/* For XXV710 */
 		dev_info->speed_capa = ETH_LINK_SPEED_25G;
-	else
+		dev_info->default_rxportconf.nb_queues = 1;
+		dev_info->default_txportconf.nb_queues = 1;
+		dev_info->default_rxportconf.ring_size = 256;
+		dev_info->default_txportconf.ring_size = 256;
+	} else {
 		/* For X710 */
 		dev_info->speed_capa = ETH_LINK_SPEED_1G | ETH_LINK_SPEED_10G;
+		dev_info->default_rxportconf.nb_queues = 1;
+		dev_info->default_txportconf.nb_queues = 1;
+		if (dev->data->dev_conf.link_speeds & ETH_LINK_SPEED_10G) {
+			dev_info->default_rxportconf.ring_size = 512;
+			dev_info->default_txportconf.ring_size = 256;
+		} else {
+			dev_info->default_rxportconf.ring_size = 256;
+			dev_info->default_txportconf.ring_size = 256;
+		}
+	}
+	dev_info->default_rxportconf.burst_size = 32;
+	dev_info->default_txportconf.burst_size = 32;
 }
 
 static int