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authorJulian Wiedmann <jwi@linux.ibm.com>2020-05-06 10:09:40 +0200
committerDavid S. Miller <davem@davemloft.net>2020-05-06 14:11:25 -0700
commit3be83016275d1e113ce8c4aa477174a8a6d7a55d (patch)
treebc7428abc479d8977b6c53469e62589cc067b2e0 /drivers/s390
parent2f8649900b7d0dced6aff0765ea15e874a91b73c (diff)
s390/qeth: keep track of LP2LP capability for csum offload
When enabling TX CSO, make a note of whether the device has support for LP2LP offloading. This will become relevant in subsequent patches. 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.h3
-rw-r--r--drivers/s390/net/qeth_core_main.c23
2 files changed, 17 insertions, 9 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index e0b26310ecab..2ac7771394d8 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -688,6 +688,9 @@ struct qeth_card_info {
u8 promisc_mode:1;
u8 use_v1_blkt:1;
u8 is_vm_nic:1;
+ /* no bitfield, we take a pointer on these two: */
+ u8 has_lp2lp_cso_v6;
+ u8 has_lp2lp_cso_v4;
enum qeth_card_types type;
enum qeth_link_types link_type;
int broadcast_capable;
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index f7689461c242..ef96890eea5c 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -6300,7 +6300,7 @@ static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
}
static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
- enum qeth_prot_versions prot)
+ enum qeth_prot_versions prot, u8 *lp2lp)
{
u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
struct qeth_cmd_buffer *iob;
@@ -6352,8 +6352,11 @@ static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
- if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
- cstype == IPA_OUTBOUND_CHECKSUM)
+
+ if (lp2lp)
+ *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
+
+ if (lp2lp && !*lp2lp)
dev_warn(&card->gdev->dev,
"Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
QETH_CARD_IFNAME(card));
@@ -6361,9 +6364,9 @@ static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
}
static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
- enum qeth_prot_versions prot)
+ enum qeth_prot_versions prot, u8 *lp2lp)
{
- return on ? qeth_set_csum_on(card, cstype, prot) :
+ return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
qeth_set_csum_off(card, cstype, prot);
}
@@ -6451,13 +6454,13 @@ static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
- QETH_PROT_IPV4);
+ QETH_PROT_IPV4, NULL);
if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
/* no/one Offload Assist available, so the rc is trivial */
return rc_ipv4;
rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
- QETH_PROT_IPV6);
+ QETH_PROT_IPV6, NULL);
if (on)
/* enable: success if any Assist is active */
@@ -6504,13 +6507,15 @@ int qeth_set_features(struct net_device *dev, netdev_features_t features)
if ((changed & NETIF_F_IP_CSUM)) {
rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
- IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
+ IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
+ &card->info.has_lp2lp_cso_v4);
if (rc)
changed ^= NETIF_F_IP_CSUM;
}
if (changed & NETIF_F_IPV6_CSUM) {
rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
- IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
+ IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
+ &card->info.has_lp2lp_cso_v6);
if (rc)
changed ^= NETIF_F_IPV6_CSUM;
}

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