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enetc: Enable TC offloading with mqprio

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Add support to configure multiple prioritized TX traffic
classes with mqprio.

Configure one BD ring per TC for the moment, one netdev
queue per TC.

Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Camelia Groza
2019-05-27 18:21:31 +03:00
committed by David S. Miller
parent 7f3343234c
commit cbe9e83594
5 changed files with 72 additions and 1 deletions
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56
drivers/net/ethernet/freescale/enetc/enetc.c
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@@ -1427,6 +1427,62 @@ int enetc_close(struct net_device *ndev)
return 0;
}
int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type,
void *type_data)
{
struct enetc_ndev_priv *priv = netdev_priv(ndev);
struct tc_mqprio_qopt *mqprio = type_data;
struct enetc_bdr *tx_ring;
u8 num_tc;
int i;
if (type != TC_SETUP_QDISC_MQPRIO)
return -EOPNOTSUPP;
mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
num_tc = mqprio->num_tc;
if (!num_tc) {
netdev_reset_tc(ndev);
netif_set_real_num_tx_queues(ndev, priv->num_tx_rings);
/* Reset all ring priorities to 0 */
for (i = 0; i < priv->num_tx_rings; i++) {
tx_ring = priv->tx_ring[i];
enetc_set_bdr_prio(&priv->si->hw, tx_ring->index, 0);
}
return 0;
}
/* Check if we have enough BD rings available to accommodate all TCs */
if (num_tc > priv->num_tx_rings) {
netdev_err(ndev, "Max %d traffic classes supported\n",
priv->num_tx_rings);
return -EINVAL;
}
/* For the moment, we use only one BD ring per TC.
*
* Configure num_tc BD rings with increasing priorities.
*/
for (i = 0; i < num_tc; i++) {
tx_ring = priv->tx_ring[i];
enetc_set_bdr_prio(&priv->si->hw, tx_ring->index, i);
}
/* Reset the number of netdev queues based on the TC count */
netif_set_real_num_tx_queues(ndev, num_tc);
netdev_set_num_tc(ndev, num_tc);
/* Each TC is associated with one netdev queue */
for (i = 0; i < num_tc; i++)
netdev_set_tc_queue(ndev, i, 1, i);
return 0;
}
struct net_device_stats *enetc_get_stats(struct net_device *ndev)
{
struct enetc_ndev_priv *priv = netdev_priv(ndev);