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net: dpaa2-eth: add support to query the number of queues through ethtool

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The .get_channels() ethtool_ops callback is implemented and exports the
number of queues: Rx, Tx, Tx conf and Rx err.
The last two ones, Tx confirmation and Rx err, are counted as 'others'.

The .set_channels() callback is not implemented since the DPAA2
software/firmware architecture does not allow the dynamic
reconfiguration of the number of queues.

Signed-off-by: Robert-Ionut Alexa <robert-ionut.alexa@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Robert-Ionut Alexa 2022-10-18 17:18:50 +03:00 committed by David S. Miller
parent 3bd5549bd4
commit 14e493ddc3
1 changed files with 25 additions and 2 deletions
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27
drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
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@ -1,7 +1,6 @@
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/* Copyright 2014-2016 Freescale Semiconductor Inc.
* Copyright 2016 NXP
* Copyright 2020 NXP
* Copyright 2016-2022 NXP
*/
#include <linux/net_tstamp.h>
@ -876,6 +875,29 @@ static int dpaa2_eth_set_coalesce(struct net_device *dev,
return err;
}
static void dpaa2_eth_get_channels(struct net_device *net_dev,
struct ethtool_channels *channels)
{
struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
int queue_count = dpaa2_eth_queue_count(priv);
channels->max_rx = queue_count;
channels->max_tx = queue_count;
channels->rx_count = queue_count;
channels->tx_count = queue_count;
/* Tx confirmation and Rx error */
channels->max_other = queue_count + 1;
channels->max_combined = channels->max_rx +
channels->max_tx +
channels->max_other;
/* Tx conf and Rx err */
channels->other_count = queue_count + 1;
channels->combined_count = channels->rx_count +
channels->tx_count +
channels->other_count;
}
const struct ethtool_ops dpaa2_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
@ -896,4 +918,5 @@ const struct ethtool_ops dpaa2_ethtool_ops = {
.set_tunable = dpaa2_eth_set_tunable,
.get_coalesce = dpaa2_eth_get_coalesce,
.set_coalesce = dpaa2_eth_set_coalesce,
.get_channels = dpaa2_eth_get_channels,
};