Commit 74fc5a45 authored by Dario Binacchi's avatar Dario Binacchi Committed by Marc Kleine-Budde
Browse files

can: flexcan: add ethtool support to get rx/tx ring parameters 

This patch adds ethtool support to get the number of message buffers
configured for reception/transmission, which may also depends on
runtime configurations such as the 'rx-rtr' flag state.

Link: https://lore.kernel.org/all/20220108181633.420433-1-dario.binacchi@amarulasolutions.com


Signed-off-by: default avatarDario Binacchi <dario.binacchi@amarulasolutions.com>
[mkl: port to net-next/master, replace __sw_hweight64 by simpler calculation]
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 1c45f577

drivers/net/can/flexcan/flexcan-ethtool.c

+21 −0
Original line number Diff line number Diff line
@@ -17,6 +17,26 @@ static const char flexcan_priv_flags_strings[][ETH_GSTRING_LEN] = { 
	"rx-rtr",

};



static void

flexcan_get_ringparam(struct net_device *ndev, struct ethtool_ringparam *ring,

		      struct kernel_ethtool_ringparam *kernel_ring,

		      struct netlink_ext_ack *ext_ack)

{

	const struct flexcan_priv *priv = netdev_priv(ndev);



	ring->rx_max_pending = priv->mb_count;

	ring->tx_max_pending = priv->mb_count;



	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX)

		ring->rx_pending = priv->offload.mb_last -

			priv->offload.mb_first + 1;

	else

		ring->rx_pending = 6;	/* RX-FIFO depth is fixed */



	/* the drive currently supports only on TX buffer */

	ring->tx_pending = 1;

}



static void

flexcan_get_strings(struct net_device *ndev, u32 stringset, u8 *data)

{
@@ -81,6 +101,7 @@ static int flexcan_get_sset_count(struct net_device *netdev, int sset) 
}



static const struct ethtool_ops flexcan_ethtool_ops = {

	.get_ringparam = flexcan_get_ringparam,

	.get_strings = flexcan_get_strings,

	.get_priv_flags = flexcan_get_priv_flags,

	.set_priv_flags = flexcan_set_priv_flags,