netdev - [PATCH] ethernet: mvneta: Support netpoll

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Message-Id: <1459197678-12022-1-git-send-email-ezequiel@vanguardiasur.com.ar>
Date:	Mon, 28 Mar 2016 17:41:18 -0300
From:	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:	<netdev@...r.kernel.org>,
	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
Subject: [PATCH] ethernet: mvneta: Support netpoll

This commit adds the support for netpoll, which is used
to implement netconsole.

Signed-off-by: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
---
Tested on Armada 370 Mirabox and Armada XP Openblocks AX3-4
with netconsole.

 drivers/net/ethernet/marvell/mvneta.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 577f7ca7deba..dd114303c98f 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -3813,6 +3813,24 @@ static int mvneta_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
 	return 0;
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void mvneta_percpu_poll_controller(void *arg)
+{
+	struct mvneta_port *pp = arg;
+	struct mvneta_pcpu_port *pcpu_port =
+		this_cpu_ptr(pp->ports);
+	mvneta_isr(pp->dev->irq, pcpu_port);
+}
+
+/* Polled functionality used by netconsole and others in non interrupt mode */
+static void mvneta_poll_controller(struct net_device *dev)
+{
+	struct mvneta_port *pp = netdev_priv(dev);
+
+	on_each_cpu(mvneta_percpu_poll_controller, pp, false);
+}
+#endif
+
 static const struct net_device_ops mvneta_netdev_ops = {
 	.ndo_open            = mvneta_open,
 	.ndo_stop            = mvneta_stop,
@@ -3823,6 +3841,9 @@ static const struct net_device_ops mvneta_netdev_ops = {
 	.ndo_fix_features    = mvneta_fix_features,
 	.ndo_get_stats64     = mvneta_get_stats64,
 	.ndo_do_ioctl        = mvneta_ioctl,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller = mvneta_poll_controller,
+#endif
 };
 
 const struct ethtool_ops mvneta_eth_tool_ops = {
-- 
2.7.0