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authorEli Cohen <eli@dev.mellanox.co.il>2010-08-26 17:18:59 +0300
committerRoland Dreier <rolandd@cisco.com>2010-10-25 10:20:39 -0700
commitaf7bd463761c6abd8ca8d831f9cc0ac19f3b7d4b (patch)
tree65d997130a892b0da260e308919ed67255a16f77 /drivers/infiniband/core/ud_header.c
parentfa417f7b520ee60b39f7e23528d2030af30a07d1 (diff)
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>
Diffstat (limited to 'drivers/infiniband/core/ud_header.c')
-rw-r--r--drivers/infiniband/core/ud_header.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/infiniband/core/ud_header.c b/drivers/infiniband/core/ud_header.c
index cb0dd5ae2777..bb7e19280821 100644
--- a/drivers/infiniband/core/ud_header.c
+++ b/drivers/infiniband/core/ud_header.c
@@ -33,6 +33,7 @@
#include <linux/errno.h>
#include <linux/string.h>
+#include <linux/if_ether.h>
#include <rdma/ib_pack.h>
@@ -103,6 +104,17 @@ static const struct ib_field eth_table[] = {
.size_bits = 16 }
};
+static const struct ib_field vlan_table[] = {
+ { STRUCT_FIELD(vlan, tag),
+ .offset_words = 0,
+ .offset_bits = 0,
+ .size_bits = 16 },
+ { STRUCT_FIELD(vlan, type),
+ .offset_words = 0,
+ .offset_bits = 16,
+ .size_bits = 16 }
+};
+
static const struct ib_field grh_table[] = {
{ STRUCT_FIELD(grh, ip_version),
.offset_words = 0,
@@ -205,6 +217,7 @@ static const struct ib_field deth_table[] = {
* @payload_bytes:Length of packet payload
* @lrh_present: specify if LRH is present
* @eth_present: specify if Eth header is present
+ * @vlan_present: packet is tagged vlan
* @grh_present:GRH flag (if non-zero, GRH will be included)
* @immediate_present: specify if immediate data is present
* @header:Structure to initialize
@@ -212,6 +225,7 @@ static const struct ib_field deth_table[] = {
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)
@@ -234,6 +248,9 @@ void ib_ud_header_init(int payload_bytes,
header->lrh.packet_length = cpu_to_be16(packet_length);
}
+ if (vlan_present)
+ header->eth.type = cpu_to_be16(ETH_P_8021Q);
+
if (grh_present) {
header->grh.ip_version = 6;
header->grh.payload_length =
@@ -254,6 +271,7 @@ void ib_ud_header_init(int payload_bytes,
header->lrh_present = lrh_present;
header->eth_present = eth_present;
+ header->vlan_present = vlan_present;
header->grh_present = grh_present;
header->immediate_present = immediate_present;
}
@@ -312,6 +330,11 @@ int ib_ud_header_pack(struct ib_ud_header *header,
&header->eth, buf + len);
len += IB_ETH_BYTES;
}
+ if (header->vlan_present) {
+ ib_pack(vlan_table, ARRAY_SIZE(vlan_table),
+ &header->vlan, buf + len);
+ len += IB_VLAN_BYTES;
+ }
if (header->grh_present) {
ib_pack(grh_table, ARRAY_SIZE(grh_table),
&header->grh, buf + len);