[dpdk-stable] patch 'app/testpmd: fix DCB configuration' has been queued to stable release 16.07.2

[Yuanhan Liu <yuanhan.liu@linux.intel.com>]

Hi,

FYI, your patch has been queued to stable release 16.07.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable
yet. It will be pushed if I get no objections before 11/06/16.
So please shout if anyone has objections.

Thanks.

	--yliu

---
>From de9093a795631175fe0d9bedf42ffc217cb35ffb Mon Sep 17 00:00:00 2001
From: Wenzhuo Lu <wenzhuo.lu@intel.com>
Date: Mon, 26 Sep 2016 09:11:11 +0800
Subject: [PATCH] app/testpmd: fix DCB configuration

[ upstream commit 2a977b891f994d0e216812275af2156fb8566944 ]

An issue is found that DCB cannot be configured on ixgbe
NICs. It's said the TX queue number is not right.
On ixgbe the max TX queue number is not fixed, it depends
on the multi-queue mode.

This patch adds the device configuration before getting
info in the DCB configuration process. So the right info
can be got depending on the configuration.

Fixes: 1a572499 ("app/testpmd: setup DCB forwarding based on traffic class")

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
---
 app/test-pmd/testpmd.c | 45 +++++++++++++++++++++++++++------------------
 1 file changed, 27 insertions(+), 18 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index e9c7412..8bcafa3 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1964,17 +1964,36 @@ init_port_dcb_config(portid_t pid,
 		     uint8_t pfc_en)
 {
 	struct rte_eth_conf port_conf;
-	struct rte_eth_dev_info dev_info;
 	struct rte_port *rte_port;
 	int retval;
 	uint16_t i;
 
-	rte_eth_dev_info_get(pid, &dev_info);
+	rte_port = &ports[pid];
+
+	memset(&port_conf, 0, sizeof(struct rte_eth_conf));
+	/* Enter DCB configuration status */
+	dcb_config = 1;
+
+	/*set configuration of DCB in vt mode and DCB in non-vt mode*/
+	retval = get_eth_dcb_conf(&port_conf, dcb_mode, num_tcs, pfc_en);
+	if (retval < 0)
+		return retval;
+	port_conf.rxmode.hw_vlan_filter = 1;
+
+	/**
+	 * Write the configuration into the device.
+	 * Set the numbers of RX & TX queues to 0, so
+	 * the RX & TX queues will not be setup.
+	 */
+	(void)rte_eth_dev_configure(pid, 0, 0, &port_conf);
+
+	rte_eth_dev_info_get(pid, &rte_port->dev_info);
 
 	/* If dev_info.vmdq_pool_base is greater than 0,
 	 * the queue id of vmdq pools is started after pf queues.
 	 */
-	if (dcb_mode == DCB_VT_ENABLED && dev_info.vmdq_pool_base > 0) {
+	if (dcb_mode == DCB_VT_ENABLED &&
+	    rte_port->dev_info.vmdq_pool_base > 0) {
 		printf("VMDQ_DCB multi-queue mode is nonsensical"
 			" for port %d.", pid);
 		return -1;
@@ -1984,13 +2003,13 @@ init_port_dcb_config(portid_t pid,
 	 * and has the same number of rxq and txq in dcb mode
 	 */
 	if (dcb_mode == DCB_VT_ENABLED) {
-		nb_rxq = dev_info.max_rx_queues;
-		nb_txq = dev_info.max_tx_queues;
+		nb_rxq = rte_port->dev_info.max_rx_queues;
+		nb_txq = rte_port->dev_info.max_tx_queues;
 	} else {
 		/*if vt is disabled, use all pf queues */
-		if (dev_info.vmdq_pool_base == 0) {
-			nb_rxq = dev_info.max_rx_queues;
-			nb_txq = dev_info.max_tx_queues;
+		if (rte_port->dev_info.vmdq_pool_base == 0) {
+			nb_rxq = rte_port->dev_info.max_rx_queues;
+			nb_txq = rte_port->dev_info.max_tx_queues;
 		} else {
 			nb_rxq = (queueid_t)num_tcs;
 			nb_txq = (queueid_t)num_tcs;
@@ -1999,16 +2018,6 @@ init_port_dcb_config(portid_t pid,
 	}
 	rx_free_thresh = 64;
 
-	memset(&port_conf, 0, sizeof(struct rte_eth_conf));
-	/* Enter DCB configuration status */
-	dcb_config = 1;
-
-	/*set configuration of DCB in vt mode and DCB in non-vt mode*/
-	retval = get_eth_dcb_conf(&port_conf, dcb_mode, num_tcs, pfc_en);
-	if (retval < 0)
-		return retval;
-
-	rte_port = &ports[pid];
 	memcpy(&rte_port->dev_conf, &port_conf, sizeof(struct rte_eth_conf));
 
 	rxtx_port_config(rte_port);
-- 
1.9.0