i40e: set default Rx/Tx configuration

Many sample apps use duplicated code to set rte_eth_txconf and rte_eth_rxconf
structures. This patch allows the user to get a default optimal RX/TX configuration
through rte_eth_dev_info get, and still any parameters may be tweaked as wished,
before setting up queues.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Reviewed-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: David Marchand <david.marchand@6wind.com>
[Thomas: split patch]

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 52f01a5..46c43a7 100644 (file)
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -58,6 +58,17 @@
 #include "i40e_rxtx.h"
 #include "i40e_pf.h"
 
+#define I40E_DEFAULT_RX_FREE_THRESH  32
+#define I40E_DEFAULT_RX_PTHRESH      8
+#define I40E_DEFAULT_RX_HTHRESH      8
+#define I40E_DEFAULT_RX_WTHRESH      0
+
+#define I40E_DEFAULT_TX_FREE_THRESH  32
+#define I40E_DEFAULT_TX_PTHRESH      32
+#define I40E_DEFAULT_TX_HTHRESH      0
+#define I40E_DEFAULT_TX_WTHRESH      0
+#define I40E_DEFAULT_TX_RSBIT_THRESH 32
+
 /* Maximun number of MAC addresses */
 #define I40E_NUM_MACADDR_MAX       64
 #define I40E_CLEAR_PXE_WAIT_MS     200
@@ -1389,6 +1400,28 @@ i40e_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
                DEV_TX_OFFLOAD_UDP_CKSUM |
                DEV_TX_OFFLOAD_TCP_CKSUM |
                DEV_TX_OFFLOAD_SCTP_CKSUM;
+
+       dev_info->default_rxconf = (struct rte_eth_rxconf) {
+               .rx_thresh = {
+                       .pthresh = I40E_DEFAULT_RX_PTHRESH,
+                       .hthresh = I40E_DEFAULT_RX_HTHRESH,
+                       .wthresh = I40E_DEFAULT_RX_WTHRESH,
+               },
+               .rx_free_thresh = I40E_DEFAULT_RX_FREE_THRESH,
+               .rx_drop_en = 0,
+       };
+
+       dev_info->default_txconf = (struct rte_eth_txconf) {
+               .tx_thresh = {
+                       .pthresh = I40E_DEFAULT_TX_PTHRESH,
+                       .hthresh = I40E_DEFAULT_TX_HTHRESH,
+                       .wthresh = I40E_DEFAULT_TX_WTHRESH,
+               },
+               .tx_free_thresh = I40E_DEFAULT_TX_FREE_THRESH,
+               .tx_rs_thresh = I40E_DEFAULT_TX_RSBIT_THRESH,
+               .txq_flags = ETH_TXQ_FLAGS_NOMULTSEGS | ETH_TXQ_FLAGS_NOOFFLOADS,
+       };
+
 }
 
 static int