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| author | Dario Binacchi <dario.binacchi@amarulasolutions.com> | 2022-01-08 19:16:33 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-01-08 21:22:58 +0100 |
| commit | 74fc5a452ec3d7c051fed5e97494effb2e747d1d (patch) | |
| tree | 7203c62914519563d66820638cd703f50542165f | |
| parent | 1c45f5778a3be5a67e8b318ab83664014ffa1f3e (diff) | |
| download | trivial-74fc5a452ec3d7c051fed5e97494effb2e747d1d.tar.gz | |
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: Dario Binacchi <dario.binacchi@amarulasolutions.com>
[mkl: port to net-next/master, replace __sw_hweight64 by simpler calculation]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
| -rw-r--r-- | drivers/net/can/flexcan/flexcan-ethtool.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/can/flexcan/flexcan-ethtool.c b/drivers/net/can/flexcan/flexcan-ethtool.c index d01347fbfaa9cf..3ae53557770071 100644 --- a/drivers/net/can/flexcan/flexcan-ethtool.c +++ b/drivers/net/can/flexcan/flexcan-ethtool.c @@ -18,6 +18,26 @@ static const char flexcan_priv_flags_strings[][ETH_GSTRING_LEN] = { }; 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) { switch (stringset) { @@ -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, |