[dpdk-stable] patch 'net/ixgbe: fix mapping of user priority to TC' has been queued to LTS release 16.11.4

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/01/17. So please
shout if anyone has objections.

Thanks.

Kind regards,
Luca Boccassi

---
>From c31b1e7fc352af4044517288ac0eeda978783e78 Mon Sep 17 00:00:00 2001
From: Wei Dai <wei.dai at intel.com>
Date: Mon, 21 Aug 2017 15:50:05 +0800
Subject: [PATCH] net/ixgbe: fix mapping of user priority to TC

[ upstream commit a8e54b44515ce741a0b73fe2e35e99f6f1dcef4b ]

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")

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 d1e300a58..8b18b5302 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -3395,12 +3395,19 @@ 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);
 	}
 }
 
@@ -3422,12 +3429,18 @@ 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);
 	}
 }
 
@@ -3443,12 +3456,18 @@ 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);
 	}
 }
 
@@ -3464,12 +3483,18 @@ 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);
 	}
 }
 
-- 
2.11.0