In order to implement IP based addressing for UD QPs, we need a way to
resolve the addresses internally.
When the provider detects an Ethernet link layer with IP based gids,
it calls a helper function in libibverbs in order to resolve the
Ethernet L2 params.
Signed-off-by: Matan Barak <matanb@xxxxxxxxxxxx>
Signed-off-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
---
src/verbs.c | 26 ++++++++++++++++++++++----
1 files changed, 22 insertions(+), 4 deletions(-)
diff --git a/src/verbs.c b/src/verbs.c
index 5c069ea..831e934 100644
--- a/src/verbs.c
+++ b/src/verbs.c
@@ -856,11 +856,29 @@ struct ibv_ah *mlx4_create_ah(struct ibv_pd *pd, struct ibv_ah_attr *attr)
memcpy(ah->av.dgid, attr->grh.dgid.raw, 16);
}
- if (port_attr.link_layer == IBV_LINK_LAYER_ETHERNET)
- if (mlx4_resolve_grh_to_l2(pd, ah, attr)) {
- free(ah);
- return NULL;
+ if (port_attr.link_layer == IBV_LINK_LAYER_ETHERNET) {
+ if (port_attr.port_cap_flags & IBV_PORT_IP_BASED_GIDS) {
+ uint16_t vid;
+
+ if (ibv_resolve_eth_l2_from_gid(pd->context, attr,
+ ah->mac, &vid)) {
+ free(ah);
+ return NULL;
+ }
+
+ if (vid <= 0xfff) {
+ ah->av.port_pd |= htonl(1 << 29);
+ ah->vlan = vid |
+ ((attr->sl & 7) << 13);
+ }
+
+ } else {
+ if (mlx4_resolve_grh_to_l2(pd, ah, attr)) {
+ free(ah);
+ return NULL;
+ }
}
+ }
return &ah->ibv_ah;
}
--
1.7.1
--
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