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authorJulian Wiedmann <jwi@linux.ibm.com>2019-04-17 18:17:34 +0200
committerDavid S. Miller <davem@davemloft.net>2019-04-17 19:33:59 +0200
commite6c15b5f34a9c7dede9ba4b251f90abe5fbd40f6 (patch)
tree39a9e8c1de7c80af142c59bb7322d4825c67712e /drivers/s390
parents390/qeth: add TX multiqueue support for OSA devices (diff)
downloadlinux-e6c15b5f34a9c7dede9ba4b251f90abe5fbd40f6.tar.xz
linux-e6c15b5f34a9c7dede9ba4b251f90abe5fbd40f6.zip
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 70deb01662b1 ("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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_core_main.c23
-rw-r--r--drivers/s390/net/qeth_core_sys.c4
2 files changed, 7 insertions, 20 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 6640616a8439..d23ad6e3bb45 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -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;
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index b43d8bdf4c3e..cea4a0bbc303 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -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")) {