[dpdk-stable] patch 'net/bonding: fix number of bonding Tx/Rx queues' has been queued to LTS release 16.11.3

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 16.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/19/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From a553b4971cef88f214485c97868b8231893721e5 Mon Sep 17 00:00:00 2001
From: Declan Doherty <declan.doherty at intel.com>
Date: Tue, 4 Jul 2017 17:46:24 +0100
Subject: [PATCH] net/bonding: fix number of bonding Tx/Rx queues

[ upstream commit acfb51e2fe96c27a042248ee32930cbd78f36cd7 ]

This patch fixes the maximum number of Tx an Rx queues supported by a
bonding device return by the rte_eth_dev_info_get function.

The bonding device now calculates the maximum number of supported Tx
and Rx queues based on the slaves bound to the bonded device, with the
minimum values of Tx and Rx queues from the device slaves being the
bonded devices maximum, as each slave must be able to support the same
number of Tx and Rx queues.

Fixes: 2efb58cbab6e ("bond: new link bonding library")

Signed-off-by: Declan Doherty <declan.doherty at intel.com>
---
 drivers/net/bonding/rte_eth_bond_pmd.c | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index 71316b4..7811a5a 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1667,6 +1667,8 @@ static void
 bond_ethdev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 {
 	struct bond_dev_private *internals = dev->data->dev_private;
+	uint16_t max_nb_rx_queues = UINT16_MAX;
+	uint16_t max_nb_tx_queues = UINT16_MAX;
 
 	dev_info->max_mac_addrs = 1;
 
@@ -1674,8 +1676,29 @@ bond_ethdev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 				  ? internals->candidate_max_rx_pktlen
 				  : ETHER_MAX_JUMBO_FRAME_LEN;
 
-	dev_info->max_rx_queues = (uint16_t)128;
-	dev_info->max_tx_queues = (uint16_t)512;
+	if (internals->slave_count > 0) {
+		/* Max number of tx/rx queues that the bonded device can
+		 * support is the minimum values of the bonded slaves, as
+		 * all slaves must be capable of supporting the same number
+		 * of tx/rx queues.
+		 */
+		struct rte_eth_dev_info slave_info;
+		uint8_t idx;
+
+		for (idx = 0; idx < internals->slave_count; idx++) {
+			rte_eth_dev_info_get(internals->slaves[idx].port_id,
+					&slave_info);
+
+			if (slave_info.max_rx_queues < max_nb_rx_queues)
+				max_nb_rx_queues = slave_info.max_rx_queues;
+
+			if (slave_info.max_tx_queues < max_nb_tx_queues)
+				max_nb_tx_queues = slave_info.max_tx_queues;
+		}
+	}
+
+	dev_info->max_rx_queues = max_nb_rx_queues;
+	dev_info->max_tx_queues = max_nb_tx_queues;
 
 	dev_info->min_rx_bufsize = 0;
 	dev_info->pci_dev = NULL;
-- 
2.7.4