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net: mvpp2: support XPS by mapping TX queues to CPUs

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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 <ymarkman@marvell.com>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxime Chevallier 2018-09-24 11:11:05 +02:00 committed by David S. Miller
parent 12ba7e1045
commit 0d283ab5b4
1 changed files with 5 additions and 1 deletions
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6
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
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@ -2423,13 +2423,17 @@ err_cleanup:
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) {