From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: extract helpers for managing special IPs
Patch-mainline: v4.17-rc1
Git-commit: 1617dae25e4478e0128da1bf467a18371a16e237
References: FATE#326350, LTC#169511, bsc#1113509
Summary: qeth: performance improvements
Description: This adds recent functional and performance improvements for the
qeth network driver.
Primarily this brings Scatter-Gather support for HiperSockets,
reduced CPU consumption in the L3 IPv4 transmit path for OSA,
improved Promiscuous Mode performance due to IFF_UNICAST_FLT,
support for Scatter-Gather on z/VM virtual NICs, and
support for delayed GRO flushing.
For sanity & stability reasons, this effectively constitutes a
backport of the qeth device driver from 4.19 mainline.
Upstream-Description:
s390/qeth: extract helpers for managing special IPs
Reduce code duplication.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/s390/net/qeth_l3.h | 13 +--
drivers/s390/net/qeth_l3_main.c | 158 ++++++++++------------------------------
drivers/s390/net/qeth_l3_sys.c | 51 +++---------
3 files changed, 57 insertions(+), 165 deletions(-)
--- a/drivers/s390/net/qeth_l3.h
+++ b/drivers/s390/net/qeth_l3.h
@@ -118,15 +118,10 @@ int qeth_l3_add_ipato_entry(struct qeth_
int qeth_l3_del_ipato_entry(struct qeth_card *card,
enum qeth_prot_versions proto, u8 *addr,
int mask_bits);
-int qeth_l3_add_vipa(struct qeth_card *, enum qeth_prot_versions, const u8 *);
-int qeth_l3_del_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
- const u8 *addr);
-int qeth_l3_add_rxip(struct qeth_card *, enum qeth_prot_versions, const u8 *);
-int qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
- const u8 *addr);
void qeth_l3_update_ipato(struct qeth_card *card);
-struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions);
-int qeth_l3_add_ip(struct qeth_card *, struct qeth_ipaddr *);
-int qeth_l3_delete_ip(struct qeth_card *, struct qeth_ipaddr *);
+int qeth_l3_modify_hsuid(struct qeth_card *card, bool add);
+int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
+ enum qeth_ip_types type,
+ enum qeth_prot_versions proto);
#endif /* __QETH_L3_H__ */
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -66,7 +66,7 @@ void qeth_l3_ipaddr_to_string(enum qeth_
qeth_l3_ipaddr6_to_string(addr, buf);
}
-struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
+static struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
{
struct qeth_ipaddr *addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
@@ -146,12 +146,18 @@ static bool qeth_l3_is_addr_covered_by_i
return rc;
}
-int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
+static int qeth_l3_delete_ip(struct qeth_card *card,
+ struct qeth_ipaddr *tmp_addr)
{
int rc = 0;
struct qeth_ipaddr *addr;
- QETH_CARD_TEXT(card, 4, "delip");
+ if (tmp_addr->type == QETH_IP_TYPE_RXIP)
+ QETH_CARD_TEXT(card, 2, "delrxip");
+ else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
+ QETH_CARD_TEXT(card, 2, "delvipa");
+ else
+ QETH_CARD_TEXT(card, 2, "delip");
if (tmp_addr->proto == QETH_PROT_IPV4)
QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
@@ -179,13 +185,18 @@ int qeth_l3_delete_ip(struct qeth_card *
return rc;
}
-int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
+static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
{
int rc = 0;
struct qeth_ipaddr *addr;
char buf[40];
- QETH_CARD_TEXT(card, 4, "addip");
+ if (tmp_addr->type == QETH_IP_TYPE_RXIP)
+ QETH_CARD_TEXT(card, 2, "addrxip");
+ else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
+ QETH_CARD_TEXT(card, 2, "addvipa");
+ else
+ QETH_CARD_TEXT(card, 2, "addip");
if (tmp_addr->proto == QETH_PROT_IPV4)
QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
@@ -598,132 +609,45 @@ int qeth_l3_del_ipato_entry(struct qeth_
return rc;
}
-/*
- * VIPA related functions
- */
-int qeth_l3_add_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
- const u8 *addr)
-{
- struct qeth_ipaddr *ipaddr;
- int rc;
-
- ipaddr = qeth_l3_get_addr_buffer(proto);
- if (ipaddr) {
- if (proto == QETH_PROT_IPV4) {
- QETH_CARD_TEXT(card, 2, "addvipa4");
- memcpy(&ipaddr->u.a4.addr, addr, 4);
- ipaddr->u.a4.mask = 0;
- } else if (proto == QETH_PROT_IPV6) {
- QETH_CARD_TEXT(card, 2, "addvipa6");
- memcpy(&ipaddr->u.a6.addr, addr, 16);
- ipaddr->u.a6.pfxlen = 0;
- }
- ipaddr->type = QETH_IP_TYPE_VIPA;
- ipaddr->set_flags = QETH_IPA_SETIP_VIPA_FLAG;
- ipaddr->del_flags = QETH_IPA_DELIP_VIPA_FLAG;
- } else
- return -ENOMEM;
-
- spin_lock_bh(&card->ip_lock);
- rc = qeth_l3_add_ip(card, ipaddr);
- spin_unlock_bh(&card->ip_lock);
-
- kfree(ipaddr);
-
- return rc;
-}
-
-int qeth_l3_del_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
- const u8 *addr)
-{
- struct qeth_ipaddr *ipaddr;
- int rc;
-
- ipaddr = qeth_l3_get_addr_buffer(proto);
- if (ipaddr) {
- if (proto == QETH_PROT_IPV4) {
- QETH_CARD_TEXT(card, 2, "delvipa4");
- memcpy(&ipaddr->u.a4.addr, addr, 4);
- ipaddr->u.a4.mask = 0;
- } else if (proto == QETH_PROT_IPV6) {
- QETH_CARD_TEXT(card, 2, "delvipa6");
- memcpy(&ipaddr->u.a6.addr, addr, 16);
- ipaddr->u.a6.pfxlen = 0;
- }
- ipaddr->type = QETH_IP_TYPE_VIPA;
- } else
- return -ENOMEM;
-
- spin_lock_bh(&card->ip_lock);
- rc = qeth_l3_delete_ip(card, ipaddr);
- spin_unlock_bh(&card->ip_lock);
-
- kfree(ipaddr);
- return rc;
-}
-
-/*
- * proxy ARP related functions
- */
-int qeth_l3_add_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
- const u8 *addr)
+int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
+ enum qeth_ip_types type,
+ enum qeth_prot_versions proto)
{
- struct qeth_ipaddr *ipaddr;
+ struct qeth_ipaddr addr;
int rc;
- ipaddr = qeth_l3_get_addr_buffer(proto);
- if (ipaddr) {
- if (proto == QETH_PROT_IPV4) {
- QETH_CARD_TEXT(card, 2, "addrxip4");
- memcpy(&ipaddr->u.a4.addr, addr, 4);
- ipaddr->u.a4.mask = 0;
- } else if (proto == QETH_PROT_IPV6) {
- QETH_CARD_TEXT(card, 2, "addrxip6");
- memcpy(&ipaddr->u.a6.addr, addr, 16);
- ipaddr->u.a6.pfxlen = 0;
- }
-
- ipaddr->type = QETH_IP_TYPE_RXIP;
- ipaddr->set_flags = QETH_IPA_SETIP_TAKEOVER_FLAG;
- ipaddr->del_flags = 0;
- } else
- return -ENOMEM;
+ qeth_l3_init_ipaddr(&addr, type, proto);
+ if (proto == QETH_PROT_IPV4)
+ memcpy(&addr.u.a4.addr, ip, 4);
+ else
+ memcpy(&addr.u.a6.addr, ip, 16);
+ if (type == QETH_IP_TYPE_RXIP) {
+ addr.set_flags = QETH_IPA_SETIP_TAKEOVER_FLAG;
+ } else {
+ addr.set_flags = QETH_IPA_SETIP_VIPA_FLAG;
+ addr.del_flags = QETH_IPA_DELIP_VIPA_FLAG;
+ }
spin_lock_bh(&card->ip_lock);
- rc = qeth_l3_add_ip(card, ipaddr);
+ rc = add ? qeth_l3_add_ip(card, &addr) : qeth_l3_delete_ip(card, &addr);
spin_unlock_bh(&card->ip_lock);
-
- kfree(ipaddr);
-
return rc;
}
-int qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
- const u8 *addr)
+int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
{
- struct qeth_ipaddr *ipaddr;
- int rc;
+ struct qeth_ipaddr addr;
+ int rc, i;
- ipaddr = qeth_l3_get_addr_buffer(proto);
- if (ipaddr) {
- if (proto == QETH_PROT_IPV4) {
- QETH_CARD_TEXT(card, 2, "delrxip4");
- memcpy(&ipaddr->u.a4.addr, addr, 4);
- ipaddr->u.a4.mask = 0;
- } else if (proto == QETH_PROT_IPV6) {
- QETH_CARD_TEXT(card, 2, "delrxip6");
- memcpy(&ipaddr->u.a6.addr, addr, 16);
- ipaddr->u.a6.pfxlen = 0;
- }
- ipaddr->type = QETH_IP_TYPE_RXIP;
- } else
- return -ENOMEM;
+ qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
+ addr.u.a6.addr.s6_addr[0] = 0xfe;
+ addr.u.a6.addr.s6_addr[1] = 0x80;
+ for (i = 0; i < 8; i++)
+ addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
spin_lock_bh(&card->ip_lock);
- rc = qeth_l3_delete_ip(card, ipaddr);
+ rc = add ? qeth_l3_add_ip(card, &addr) : qeth_l3_delete_ip(card, &addr);
spin_unlock_bh(&card->ip_lock);
-
- kfree(ipaddr);
return rc;
}
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -271,9 +271,8 @@ static ssize_t qeth_l3_dev_hsuid_store(s
struct device_attribute *attr, const char *buf, size_t count)
{
struct qeth_card *card = dev_get_drvdata(dev);
- struct qeth_ipaddr *addr;
char *tmp;
- int rc, i;
+ int rc;
if (!card)
return -EINVAL;
@@ -292,25 +291,9 @@ static ssize_t qeth_l3_dev_hsuid_store(s
if (strlen(tmp) > 8)
return -EINVAL;
- if (card->options.hsuid[0]) {
+ if (card->options.hsuid[0])
/* delete old ip address */
- addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
- if (!addr)
- return -ENOMEM;
-
- addr->u.a6.addr.s6_addr32[0] = cpu_to_be32(0xfe800000);
- addr->u.a6.addr.s6_addr32[1] = 0x00000000;
- for (i = 8; i < 16; i++)
- addr->u.a6.addr.s6_addr[i] =
- card->options.hsuid[i - 8];
- addr->u.a6.pfxlen = 0;
- addr->type = QETH_IP_TYPE_NORMAL;
-
- spin_lock_bh(&card->ip_lock);
- qeth_l3_delete_ip(card, addr);
- spin_unlock_bh(&card->ip_lock);
- kfree(addr);
- }
+ qeth_l3_modify_hsuid(card, false);
if (strlen(tmp) == 0) {
/* delete ip address only */
@@ -330,21 +313,7 @@ static ssize_t qeth_l3_dev_hsuid_store(s
if (card->dev)
memcpy(card->dev->perm_addr, card->options.hsuid, 9);
- addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
- if (addr != NULL) {
- addr->u.a6.addr.s6_addr32[0] = cpu_to_be32(0xfe800000);
- addr->u.a6.addr.s6_addr32[1] = 0x00000000;
- for (i = 8; i < 16; i++)
- addr->u.a6.addr.s6_addr[i] = card->options.hsuid[i - 8];
- addr->u.a6.pfxlen = 0;
- addr->type = QETH_IP_TYPE_NORMAL;
- } else
- return -ENOMEM;
-
- spin_lock_bh(&card->ip_lock);
- rc = qeth_l3_add_ip(card, addr);
- spin_unlock_bh(&card->ip_lock);
- kfree(addr);
+ rc = qeth_l3_modify_hsuid(card, true);
return rc ? rc : count;
}
@@ -766,7 +735,8 @@ static ssize_t qeth_l3_dev_vipa_add_stor
mutex_lock(&card->conf_mutex);
rc = qeth_l3_parse_vipae(buf, proto, addr);
if (!rc)
- rc = qeth_l3_add_vipa(card, proto, addr);
+ rc = qeth_l3_modify_rxip_vipa(card, true, addr,
+ QETH_IP_TYPE_VIPA, proto);
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
@@ -795,7 +765,8 @@ static ssize_t qeth_l3_dev_vipa_del_stor
mutex_lock(&card->conf_mutex);
rc = qeth_l3_parse_vipae(buf, proto, addr);
if (!rc)
- rc = qeth_l3_del_vipa(card, proto, addr);
+ rc = qeth_l3_modify_rxip_vipa(card, false, addr,
+ QETH_IP_TYPE_VIPA, proto);
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
@@ -907,7 +878,8 @@ static ssize_t qeth_l3_dev_rxip_add_stor
mutex_lock(&card->conf_mutex);
rc = qeth_l3_parse_rxipe(buf, proto, addr);
if (!rc)
- rc = qeth_l3_add_rxip(card, proto, addr);
+ rc = qeth_l3_modify_rxip_vipa(card, true, addr,
+ QETH_IP_TYPE_RXIP, proto);
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}
@@ -936,7 +908,8 @@ static ssize_t qeth_l3_dev_rxip_del_stor
mutex_lock(&card->conf_mutex);
rc = qeth_l3_parse_rxipe(buf, proto, addr);
if (!rc)
- rc = qeth_l3_del_rxip(card, proto, addr);
+ rc = qeth_l3_modify_rxip_vipa(card, false, addr,
+ QETH_IP_TYPE_RXIP, proto);
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
}