netdev - [PATCH net-next 9/9] alx: enable multiple tx queues

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Message-Id: <41b84fba502dde356b82411440dee936335896ea.1477044921.git.tobias.regnery@gmail.com>
Date:   Fri, 21 Oct 2016 12:49:52 +0200
From:   Tobias Regnery <tobias.regnery@...il.com>
To:     jcliburn@...il.com, chris.snook@...il.com, netdev@...r.kernel.org
Cc:     davem@...emloft.net, Tobias Regnery <tobias.regnery@...il.com>
Subject: [PATCH net-next 9/9] alx: enable multiple tx queues

Enable multiple tx queues by default based on the number of online cpus. The
hardware supports up to four tx queues.

Based on the downstream driver at github.com/qca/alx

Signed-off-by: Tobias Regnery <tobias.regnery@...il.com>
---
 drivers/net/ethernet/atheros/alx/main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/atheros/alx/main.c b/drivers/net/ethernet/atheros/alx/main.c
index 3b832090ad2e..df5bfa4480d7 100644
--- a/drivers/net/ethernet/atheros/alx/main.c
+++ b/drivers/net/ethernet/atheros/alx/main.c
@@ -834,7 +834,7 @@ static bool alx_enable_msix(struct alx_priv *alx)
 {
 	int i, err, num_vec, num_txq, num_rxq;
 
-	num_txq = 1;
+	num_txq = min_t(int, num_online_cpus(), ALX_MAX_TX_QUEUES);
 	num_rxq = 1;
 	num_vec = max_t(int, num_txq, num_rxq) + 1;
 
@@ -1241,6 +1241,9 @@ static int __alx_open(struct alx_priv *alx, bool resume)
 	if (err)
 		goto out_free_rings;
 
+	netif_set_real_num_tx_queues(alx->dev, alx->num_txq);
+	netif_set_real_num_rx_queues(alx->dev, alx->num_rxq);
+
 	/* clear old interrupts */
 	alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS);
 
@@ -1749,7 +1752,8 @@ static int alx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto out_pci_release;
 	}
 
-	netdev = alloc_etherdev(sizeof(*alx));
+	netdev = alloc_etherdev_mqs(sizeof(*alx),
+				    ALX_MAX_TX_QUEUES, 1);
 	if (!netdev) {
 		err = -ENOMEM;
 		goto out_pci_release;
-- 
2.7.4