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Date: Sat, 8 Jan 2022 19:16:33 +0100 From: Dario Binacchi <dario.binacchi@...rulasolutions.com> To: linux-kernel@...r.kernel.org Cc: Dario Binacchi <dario.binacchi@...rulasolutions.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Marc Kleine-Budde <mkl@...gutronix.de>, Wolfgang Grandegger <wg@...ndegger.com>, linux-can@...r.kernel.org, netdev@...r.kernel.org Subject: [RFC PATCH] can: flexcan: add ethtool support to get rx/tx ring parameters 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. Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com> --- drivers/net/can/flexcan/flexcan-ethtool.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/can/flexcan/flexcan-ethtool.c b/drivers/net/can/flexcan/flexcan-ethtool.c index 5bb45653e1ac..d119bca584f6 100644 --- a/drivers/net/can/flexcan/flexcan-ethtool.c +++ b/drivers/net/can/flexcan/flexcan-ethtool.c @@ -80,7 +80,24 @@ static int flexcan_set_priv_flags(struct net_device *ndev, u32 priv_flags) return 0; } +static void flexcan_get_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring) +{ + 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 = __sw_hweight64(priv->rx_mask); + else + ring->rx_pending = 6; + + ring->tx_pending = __sw_hweight64(priv->tx_mask); +} + static const struct ethtool_ops flexcan_ethtool_ops = { + .get_ringparam = flexcan_get_ringparam, .get_sset_count = flexcan_get_sset_count, .get_strings = flexcan_get_strings, .get_priv_flags = flexcan_get_priv_flags, -- 2.32.0
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