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s390/qeth: simplify QoS code 

qeth_get_priority_queue() is no longer used for IQD devices, remove the
special-casing of their mcast queue.

This effectively reverts
commit 70deb01662 ("qeth: omit outbound queue 3 for unicast packets in Priority Queuing on HiperSockets").

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 2019-04-17 18:17:34 +02:00 committed by David S. Miller
parent 73dc2daf11
commit e6c15b5f34
2 changed files with 7 additions and 20 deletions
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23
drivers/s390/net/qeth_core_main.c
View File

@ -3594,20 +3594,12 @@ static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
netif_wake_subqueue(dev, txq);
}
/* We cannot use outbound queue 3 for unicast packets on HiperSockets */
static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
{
if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
return 2;
return queue_num;
}
/**
* Note: Function assumes that we have 4 outbound queues.
*/
int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
{
__be16 *tci;
struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
u8 tos;
switch (card->qdio.do_prio_queueing) {
@ -3624,9 +3616,9 @@ int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
return card->qdio.default_out_queue;
}
if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
return ~tos >> 6 & 3;
if (tos & IPTOS_MINCOST)
return qeth_cut_iqd_prio(card, 3);
return 3;
if (tos & IPTOS_RELIABILITY)
return 2;
if (tos & IPTOS_THROUGHPUT)
@ -3637,12 +3629,11 @@ int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
case QETH_PRIO_Q_ING_SKB:
if (skb->priority > 5)
return 0;
return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
return ~skb->priority >> 1 & 3;
case QETH_PRIO_Q_ING_VLAN:
tci = &((struct ethhdr *)skb->data)->h_proto;
if (be16_to_cpu(*tci) == ETH_P_8021Q)
return qeth_cut_iqd_prio(card,
~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
if (veth->h_vlan_proto == htons(ETH_P_8021Q))
return ~ntohs(veth->h_vlan_TCI) >>
(VLAN_PRIO_SHIFT + 1) & 3;
break;
default:
break;

4
drivers/s390/net/qeth_core_sys.c
View File

@ -242,10 +242,6 @@ static ssize_t qeth_dev_prioqing_store(struct device *dev,
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 2;
} else if (sysfs_streq(buf, "no_prio_queueing:3")) {
if (card->info.type == QETH_CARD_TYPE_IQD) {
rc = -EPERM;
goto out;
}
card->qdio.do_prio_queueing = QETH_NO_PRIO_QUEUEING;
card->qdio.default_out_queue = 3;
} else if (sysfs_streq(buf, "no_prio_queueing")) {