From: Maxime Chevallier Date: Mon, 24 Sep 2018 09:11:05 +0000 (+0200) Subject: net: mvpp2: support XPS by mapping TX queues to CPUs X-Git-Tag: v4.20-rc1~27^2~274^2~1 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0d283ab5b4fdbcd6bde4505863010b6008b6f048;p=linux.git net: mvpp2: support XPS by mapping TX queues to CPUs Since the PPv2 controller has multiple TX queues, we can spread traffic by assining TX queues to CPUs, allowing to use XPS to balance egress traffic between CPUs. Suggested-by : Yan Markman Signed-off-by: Maxime Chevallier Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index d30ccc515bb7..bdacb9577216 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -2423,13 +2423,17 @@ static int mvpp2_setup_rxqs(struct mvpp2_port *port) static int mvpp2_setup_txqs(struct mvpp2_port *port) { struct mvpp2_tx_queue *txq; - int queue, err; + int queue, err, cpu; for (queue = 0; queue < port->ntxqs; queue++) { txq = port->txqs[queue]; err = mvpp2_txq_init(port, txq); if (err) goto err_cleanup; + + /* Assign this queue to a CPU */ + cpu = queue % num_present_cpus(); + netif_set_xps_queue(port->dev, cpumask_of(cpu), queue); } if (port->has_tx_irqs) {