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s390/qeth: remove prio-queueing support for z/VM NICs

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z/VM NICs don't offer HW QoS for TX rings. So just use netdev_pick_tx()
to distribute the connections equally over all enabled TX queues.

We start with just 1 enabled TX queue (this matches the typical
configuration without prio-queueing). A follow-on patch will allow users
to enable additional TX queues.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann
2020-03-18 13:54:47 +01:00
committed by David S. Miller
parent b413ff8a18
commit 1c103cf819
5 changed files with 49 additions and 25 deletions
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7
drivers/s390/net/qeth_l3_main.c
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@@ -1880,7 +1880,8 @@ static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
{
struct qeth_card *card = dev->ml_priv;
return qeth_get_priority_queue(card, skb);
return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
qeth_get_priority_queue(card, skb);
}
static const struct net_device_ops qeth_l3_netdev_ops = {
@@ -1922,6 +1923,10 @@ static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
unsigned int headroom;
int rc;
rc = qeth_setup_netdev(card);
if (rc)
return rc;
if (IS_OSD(card) || IS_OSX(card)) {
if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
(card->info.link_type == QETH_LINK_TYPE_HSTR)) {