IB/core: Add VLAN support for IBoE
Add 802.1q VLAN support to IBoE. The VLAN tag is encoded within the
GID derived from a link local address in the following way:
GID[11] GID[12] contain the VLAN ID when the GID contains a VLAN.
The 3 bits user priority field of the packets are identical to the 3
bits of the SL.
In case of rdma_cm apps, the TOS field is used to generate the SL
field by doing a shift right of 5 bits effectively taking to 3 MS bits
of the TOS field.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/include/rdma/ib_pack.h b/include/rdma/ib_pack.h
index 6b91d8e..b37fe3b 100644
--- a/include/rdma/ib_pack.h
+++ b/include/rdma/ib_pack.h
@@ -38,6 +38,7 @@
enum {
IB_LRH_BYTES = 8,
IB_ETH_BYTES = 14,
+ IB_VLAN_BYTES = 4,
IB_GRH_BYTES = 40,
IB_BTH_BYTES = 12,
IB_DETH_BYTES = 8
@@ -219,11 +220,18 @@
__be16 type;
};
+struct ib_unpacked_vlan {
+ __be16 tag;
+ __be16 type;
+};
+
struct ib_ud_header {
int lrh_present;
struct ib_unpacked_lrh lrh;
int eth_present;
struct ib_unpacked_eth eth;
+ int vlan_present;
+ struct ib_unpacked_vlan vlan;
int grh_present;
struct ib_unpacked_grh grh;
struct ib_unpacked_bth bth;
@@ -245,6 +253,7 @@
void ib_ud_header_init(int payload_bytes,
int lrh_present,
int eth_present,
+ int vlan_present,
int grh_present,
int immediate_present,
struct ib_ud_header *header);