Commit 2722ac98 authored by Dario Binacchi's avatar Dario Binacchi Committed by Marc Kleine-Budde
Browse files

can: c_can: add ethtool support 

With commit 132f2d45 ("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: default avatarDario Binacchi <dariobin@libero.it>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent c7b0f688

drivers/net/can/c_can/Makefile

+5 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/can/c_can/c_can.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/net/can/c_can/c_can_ethtool.c

0 → 100644
+43 −0
Original line number Diff line number Diff line 
// 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;

}

drivers/net/can/c_can/c_can.c→drivers/net/can/c_can/c_can_main.c

+1 −0
Original line number Diff line number Diff line
@@ -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)