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IB/core: Add support for RoCEv2 multicast 

When creating address handle from multicast GID, set MAC according to
the appropriate formula instead of searching for it in the GID table:
- For IPv4 multicast GID use ip_eth_mc_map().
- For IPv6 multicast GID use ipv6_eth_mc_map().

Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Noa Osherovich 2017-06-12 11:14:04 +03:00 committed by Doug Ledford
parent be1d325a33
commit 9636a56fa8
1 changed files with 12 additions and 0 deletions
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12
drivers/infiniband/core/verbs.c
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@ -1244,6 +1244,18 @@ int ib_resolve_eth_dmac(struct ib_device *device,
if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw)) {
rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
ah_attr->roce.dmac);
return 0;
}
if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
__be32 addr = 0;
memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
} else {
ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
(char *)ah_attr->roce.dmac);
}
} else {
union ib_gid sgid;
struct ib_gid_attr sgid_attr;