netdev - [PATCH net-next 1/3] qede: add netpoll support for qede driver

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Date:   Fri, 15 Jan 2021 01:06:08 -0800
From:   Bhaskar Upadhaya <bupadhaya@...vell.com>
To:     <netdev@...r.kernel.org>, <kuba@...nel.org>, <aelior@...vell.com>,
        <irusskikh@...vell.com>
CC:     <bupadhaya@...vell.com>
Subject: [PATCH  net-next 1/3] qede: add netpoll support for qede driver

Add net poll controller support to transmit kernel printks
over UDP

Signed-off-by: Bhaskar Upadhaya <bupadhaya@...vell.com>
Signed-off-by: Igor Russkikh <irusskikh@...vell.com>
Signed-off-by: Ariel Elior <aelior@...vell.com>
---
 drivers/net/ethernet/qlogic/qede/qede.h      |  4 ++++
 drivers/net/ethernet/qlogic/qede/qede_fp.c   | 14 ++++++++++++++
 drivers/net/ethernet/qlogic/qede/qede_main.c |  3 +++
 3 files changed, 21 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qede/qede.h b/drivers/net/ethernet/qlogic/qede/qede.h
index 3efc5899f656..ac12e5beb596 100644
--- a/drivers/net/ethernet/qlogic/qede/qede.h
+++ b/drivers/net/ethernet/qlogic/qede/qede.h
@@ -582,6 +582,10 @@ int qede_add_tc_flower_fltr(struct qede_dev *edev, __be16 proto,
 
 void qede_forced_speed_maps_init(void);
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+void qede_poll_controller(struct net_device *dev);
+#endif
+
 #define RX_RING_SIZE_POW	13
 #define RX_RING_SIZE		((u16)BIT(RX_RING_SIZE_POW))
 #define NUM_RX_BDS_MAX		(RX_RING_SIZE - 1)
diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c b/drivers/net/ethernet/qlogic/qede/qede_fp.c
index a2494bf85007..a626f1f45212 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_fp.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c
@@ -1804,3 +1804,17 @@ netdev_features_t qede_features_check(struct sk_buff *skb,
 
 	return features;
 }
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/* This is used by netconsole to send skbs without having to re-enable
+ * interrupts.It's not called while the normal interrupt routine is executing.
+ */
+void qede_poll_controller(struct net_device *dev)
+{
+	struct qede_dev *edev = netdev_priv(dev);
+	int i;
+
+	for_each_queue(i)
+		napi_schedule(&edev->fp_array[i].napi);
+}
+#endif
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index 05e3a3b60269..2ff6c49de745 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -644,6 +644,9 @@ static const struct net_device_ops qede_netdev_ops = {
 	.ndo_set_rx_mode	= qede_set_rx_mode,
 	.ndo_set_mac_address	= qede_set_mac_addr,
 	.ndo_validate_addr	= eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller = qede_poll_controller,
+#endif
 	.ndo_change_mtu		= qede_change_mtu,
 	.ndo_do_ioctl		= qede_ioctl,
 	.ndo_tx_timeout		= qede_tx_timeout,
-- 
2.17.1