[dpdk-dev] [PATCH] net/ixgbe: fix mapping of user priority to TC

[Wei Dai]

This patch fixes the mapping of user priority to traffic class
in Rx/Tx path of DCB configuration. Each DCB traffic class
should include all user priorities mapping to it in both Rx and
Tx path.

Fixes: 0807f80d35d0 ("ixgbe: DCB / flow control")
Cc: stable at dpdk.org

Signed-off-by: Wei Dai <wei.dai at intel.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c | 41 +++++++++++++++++++++++++++++++++--------
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 64bff25..98d0e1a 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -3517,12 +3517,19 @@ ixgbe_vmdq_dcb_rx_config(struct rte_eth_dev *dev,
 		dcb_config->num_tcs.pg_tcs = ETH_4_TCS;
 		dcb_config->num_tcs.pfc_tcs = ETH_4_TCS;
 	}
+
+	/* Initialize User Priority to Traffic Class mapping */
+	for (j = 0; j < IXGBE_DCB_MAX_TRAFFIC_CLASS; j++) {
+		tc = &dcb_config->tc_config[j];
+		tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap = 0;
+	}
+
 	/* User Priority to Traffic Class mapping */
 	for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++) {
 		j = vmdq_rx_conf->dcb_tc[i];
 		tc = &dcb_config->tc_config[j];
-		tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap =
-						(uint8_t)(1 << j);
+		tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap |=
+						(uint8_t)(1 << i);
 	}
 }
 
@@ -3544,12 +3551,18 @@ ixgbe_dcb_vt_tx_config(struct rte_eth_dev *dev,
 		dcb_config->num_tcs.pfc_tcs = ETH_4_TCS;
 	}
 
+	/* Initialize User Priority to Traffic Class mapping */
+	for (j = 0; j < IXGBE_DCB_MAX_TRAFFIC_CLASS; j++) {
+		tc = &dcb_config->tc_config[j];
+		tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap = 0;
+	}
+
 	/* User Priority to Traffic Class mapping */
 	for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++) {
 		j = vmdq_tx_conf->dcb_tc[i];
 		tc = &dcb_config->tc_config[j];
-		tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap =
-						(uint8_t)(1 << j);
+		tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap |=
+						(uint8_t)(1 << i);
 	}
 }
 
@@ -3565,12 +3578,18 @@ ixgbe_dcb_rx_config(struct rte_eth_dev *dev,
 	dcb_config->num_tcs.pg_tcs = (uint8_t)rx_conf->nb_tcs;
 	dcb_config->num_tcs.pfc_tcs = (uint8_t)rx_conf->nb_tcs;
 
+	/* Initialize User Priority to Traffic Class mapping */
+	for (j = 0; j < IXGBE_DCB_MAX_TRAFFIC_CLASS; j++) {
+		tc = &dcb_config->tc_config[j];
+		tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap = 0;
+	}
+
 	/* User Priority to Traffic Class mapping */
 	for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++) {
 		j = rx_conf->dcb_tc[i];
 		tc = &dcb_config->tc_config[j];
-		tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap =
-						(uint8_t)(1 << j);
+		tc->path[IXGBE_DCB_RX_CONFIG].up_to_tc_bitmap |=
+						(uint8_t)(1 << i);
 	}
 }
 
@@ -3586,12 +3605,18 @@ ixgbe_dcb_tx_config(struct rte_eth_dev *dev,
 	dcb_config->num_tcs.pg_tcs = (uint8_t)tx_conf->nb_tcs;
 	dcb_config->num_tcs.pfc_tcs = (uint8_t)tx_conf->nb_tcs;
 
+	/* Initialize User Priority to Traffic Class mapping */
+	for (j = 0; j < IXGBE_DCB_MAX_TRAFFIC_CLASS; j++) {
+		tc = &dcb_config->tc_config[j];
+		tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap = 0;
+	}
+
 	/* User Priority to Traffic Class mapping */
 	for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++) {
 		j = tx_conf->dcb_tc[i];
 		tc = &dcb_config->tc_config[j];
-		tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap =
-						(uint8_t)(1 << j);
+		tc->path[IXGBE_DCB_TX_CONFIG].up_to_tc_bitmap |=
+						(uint8_t)(1 << i);
 	}
 }
 
-- 
2.7.5