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net: ethernet: l2: Add support for VLAN tag strip

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If ethernet controller has VLAN tag strip flag enabled
(ETHERNET_HW_VLAN_TAG_STRIP), L2 etherent will not read tag from
the Rx etherent header. Instead it will fetch VLAN tag from
net packet metadata.

Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
This commit is contained in:
Ravi kumar Veeramally 2019-04-12 14:15:34 +03:00 • committed by Jukka Rissanen
commit 49cb24a5eb
1 changed files with 29 additions and 13 deletions
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34
subsys/net/l2/ethernet/ethernet.c
View file

@ -68,7 +68,7 @@ void net_eth_ipv6_mcast_to_mac_addr(const struct in6_addr *ipv6_addr,
}
#ifdef CONFIG_NET_VLAN
#define print_vlan_ll_addrs(pkt, type, tci, len, src, dst) \
#define print_vlan_ll_addrs(pkt, type, tci, len, src, dst, tagstrip) \
if (CONFIG_NET_L2_ETHERNET_LOG_LEVEL >= LOG_LEVEL_DBG) { \
char out[sizeof("xx:xx:xx:xx:xx:xx")]; \
\
@ -76,12 +76,13 @@ void net_eth_ipv6_mcast_to_mac_addr(const struct in6_addr *ipv6_addr,
net_sprint_ll_addr((src)->addr, \
sizeof(struct net_eth_addr))); \
\
NET_DBG("iface %p src %s dst %s type 0x%x tag %d pri %d " \
"len %zu", \
NET_DBG("iface %p src %s dst %s type 0x%x " \
"tag %d %spri %d len %zu", \
net_pkt_iface(pkt), log_strdup(out), \
log_strdup(net_sprint_ll_addr((dst)->addr, \
sizeof(struct net_eth_addr))), \
type, net_eth_vlan_get_vid(tci), \
tagstrip ? "(stripped) " : "", \
net_eth_vlan_get_pcp(tci), (size_t)len); \
}
#else
@ -136,6 +137,14 @@ static void ethernet_update_rx_stats(struct net_if *iface,
#endif /* CONFIG_NET_STATISTICS_ETHERNET */
}
static inline bool eth_is_vlan_tag_stripped(struct net_if *iface)
{
struct device *dev = net_if_get_device(iface);
const struct ethernet_api *api = dev->driver_api;
return (api->get_capabilities(dev) & ETHERNET_HW_VLAN_TAG_STRIP);
}
static enum net_verdict ethernet_recv(struct net_if *iface,
struct net_pkt *pkt)
{
@ -147,7 +156,8 @@ static enum net_verdict ethernet_recv(struct net_if *iface,
sa_family_t family;
if (net_eth_is_vlan_enabled(ctx, iface) &&
type == NET_ETH_PTYPE_VLAN) {
type == NET_ETH_PTYPE_VLAN &&
!eth_is_vlan_tag_stripped(iface)) {
struct net_eth_vlan_hdr *hdr_vlan =
(struct net_eth_vlan_hdr *)NET_ETH_HDR(pkt);
@ -196,13 +206,19 @@ static enum net_verdict ethernet_recv(struct net_if *iface,
lladdr->type = NET_LINK_ETHERNET;
if (net_eth_is_vlan_enabled(ctx, iface)) {
struct net_eth_vlan_hdr *hdr_vlan __unused =
(struct net_eth_vlan_hdr *)NET_ETH_HDR(pkt);
print_vlan_ll_addrs(pkt, type, ntohs(hdr_vlan->vlan.tci),
if (type == NET_ETH_PTYPE_VLAN ||
(eth_is_vlan_tag_stripped(iface) &&
net_pkt_vlan_tci(pkt))) {
print_vlan_ll_addrs(pkt, type, net_pkt_vlan_tci(pkt),
net_pkt_get_len(pkt),
net_pkt_lladdr_src(pkt),
net_pkt_lladdr_dst(pkt),
eth_is_vlan_tag_stripped(iface));
} else {
print_ll_addrs(pkt, type, net_pkt_get_len(pkt),
net_pkt_lladdr_src(pkt),
net_pkt_lladdr_dst(pkt));
}
} else {
print_ll_addrs(pkt, type, net_pkt_get_len(pkt),
net_pkt_lladdr_src(pkt),
@ -452,7 +468,7 @@ static struct net_buf *ethernet_fill_header(struct ethernet_context *ctx,
print_vlan_ll_addrs(pkt, ntohs(hdr_vlan->type),
net_pkt_vlan_tci(pkt),
hdr_frag->len,
&hdr_vlan->src, &hdr_vlan->dst);
&hdr_vlan->src, &hdr_vlan->dst, false);
} else {
hdr = (struct net_eth_hdr *)(hdr_frag->data);