Merge branch 'mvpp2-Add-txq-to-CPU-mapping'

Maxime Chevallier says:

====================
net: mvpp2: Add txq to CPU mapping

This short series adds XPS support to the mvpp2 driver, by mapping
txqs and CPUs. This comes with a patch using round-robin scheduling
for the HW to pick the next txq to transmit from, instead of the default
fixed-priority scheduling.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/mvpp2/mvpp2.h

@@ -331,6 +331,7 @@
 #define     MVPP2_TXP_SCHED_ENQ_MASK		0xff
 #define     MVPP2_TXP_SCHED_DISQ_OFFSET		8
 #define MVPP2_TXP_SCHED_CMD_1_REG		0x8010
+#define MVPP2_TXP_SCHED_FIXED_PRIO_REG		0x8014
 #define MVPP2_TXP_SCHED_PERIOD_REG		0x8018
 #define MVPP2_TXP_SCHED_MTU_REG			0x801c
 #define     MVPP2_TXP_MTU_MAX			0x7FFFF

drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c

@@ -1448,6 +1448,9 @@ static void mvpp2_defaults_set(struct mvpp2_port *port)
 		    tx_port_num);
 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0);
 
+	/* Set TXQ scheduling to Round-Robin */
+	mvpp2_write(port->priv, MVPP2_TXP_SCHED_FIXED_PRIO_REG, 0);
+
 	/* Close bandwidth for all queues */
 	for (queue = 0; queue < MVPP2_MAX_TXQ; queue++) {
 		ptxq = mvpp2_txq_phys(port->id, queue);
@@ -2423,13 +2426,17 @@ 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) {