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authorDario Binacchi <dariobin@libero.it>2021-05-14 18:55:47 +0200
committerMarc Kleine-Budde <mkl@pengutronix.de>2021-05-27 09:42:23 +0200
commit2722ac986e93c4cabbefde299d01ed24db40a645 (patch)
tree30122941037a4e3227da760823df992809bbb7bd /drivers/net/can
parentc7b0f6887d90665ac1aefd503c2eba1294f83473 (diff)
can: c_can: add ethtool support
With commit 132f2d45fb23 ("can: c_can: add support to 64 message objects") the number of message objects used for reception / transmission depends on FIFO size. The ethtools API support allows you to retrieve this info. Driver info has been added too. Link: https://lore.kernel.org/r/20210514165549.14365-2-dariobin@libero.it Signed-off-by: Dario Binacchi <dariobin@libero.it> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
-rw-r--r--drivers/net/can/c_can/Makefile5
-rw-r--r--drivers/net/can/c_can/c_can.h2
-rw-r--r--drivers/net/can/c_can/c_can_ethtool.c43
-rw-r--r--drivers/net/can/c_can/c_can_main.c (renamed from drivers/net/can/c_can/c_can.c)1
4 files changed, 51 insertions, 0 deletions
diff --git a/drivers/net/can/c_can/Makefile b/drivers/net/can/c_can/Makefile
index e6a94c948531..6fa3b2b9e4b9 100644
--- a/drivers/net/can/c_can/Makefile
+++ b/drivers/net/can/c_can/Makefile
@@ -4,5 +4,10 @@
#
obj-$(CONFIG_CAN_C_CAN) += c_can.o
+
+c_can-objs :=
+c_can-objs += c_can_ethtool.o
+c_can-objs += c_can_main.o
+
obj-$(CONFIG_CAN_C_CAN_PLATFORM) += c_can_platform.o
obj-$(CONFIG_CAN_C_CAN_PCI) += c_can_pci.o
diff --git a/drivers/net/can/c_can/c_can.h b/drivers/net/can/c_can/c_can.h
index 517845c4571e..4247ff80a29c 100644
--- a/drivers/net/can/c_can/c_can.h
+++ b/drivers/net/can/c_can/c_can.h
@@ -218,4 +218,6 @@ int c_can_power_up(struct net_device *dev);
int c_can_power_down(struct net_device *dev);
#endif
+void c_can_set_ethtool_ops(struct net_device *dev);
+
#endif /* C_CAN_H */
diff --git a/drivers/net/can/c_can/c_can_ethtool.c b/drivers/net/can/c_can/c_can_ethtool.c
new file mode 100644
index 000000000000..cd5f07fca2a5
--- /dev/null
+++ b/drivers/net/can/c_can/c_can_ethtool.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2021, Dario Binacchi <dariobin@libero.it>
+ */
+
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/can/dev.h>
+
+#include "c_can.h"
+
+static void c_can_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ struct c_can_priv *priv = netdev_priv(netdev);
+ struct platform_device *pdev = to_platform_device(priv->device);
+
+ strscpy(info->driver, "c_can", sizeof(info->driver));
+ strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
+}
+
+static void c_can_get_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct c_can_priv *priv = netdev_priv(netdev);
+
+ ring->rx_max_pending = priv->msg_obj_num;
+ ring->tx_max_pending = priv->msg_obj_num;
+ ring->rx_pending = priv->msg_obj_rx_num;
+ ring->tx_pending = priv->msg_obj_tx_num;
+}
+
+static const struct ethtool_ops c_can_ethtool_ops = {
+ .get_drvinfo = c_can_get_drvinfo,
+ .get_ringparam = c_can_get_ringparam,
+};
+
+void c_can_set_ethtool_ops(struct net_device *netdev)
+{
+ netdev->ethtool_ops = &c_can_ethtool_ops;
+}
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can_main.c
index 1fa47968c2ec..7588f70ca0fe 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can_main.c
@@ -1334,6 +1334,7 @@ int register_c_can_dev(struct net_device *dev)
dev->flags |= IFF_ECHO; /* we support local echo */
dev->netdev_ops = &c_can_netdev_ops;
+ c_can_set_ethtool_ops(dev);
err = register_candev(dev);
if (!err)