IB/mlx4: Add VLAN support for IBoE
This patch allows IBoE traffic to be encapsulated in 802.1Q tagged
VLAN frames. The VLAN tag is encoded in the GID and derived from it
by a simple computation.
The netdev notifier callback is modified to catch VLAN device
addition/removal and the port's GID table is updated to reflect the
change, so that for each netdevice there is an entry in the GID table.
When the port's GID table is exhausted, GID entries will not be added.
Only children of the main interfaces can add to the GID table; if a
VLAN interface is added on another VLAN interface (e.g. "vconfig add
eth2.6 8"), then that interfaces will not add an entry to the GID
table.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 2696484..9a7794a 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -37,6 +37,7 @@
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
+#include <rdma/ib_addr.h>
#include <linux/mlx4/qp.h>
@@ -57,10 +58,11 @@
enum {
/*
* Largest possible UD header: send with GRH and immediate
- * data plus 14 bytes for an Ethernet header. (LRH would only
- * use 8 bytes, so Ethernet is the biggest case)
+ * data plus 18 bytes for an Ethernet header with VLAN/802.1Q
+ * tag. (LRH would only use 8 bytes, so Ethernet is the
+ * biggest case)
*/
- MLX4_IB_UD_HEADER_SIZE = 78,
+ MLX4_IB_UD_HEADER_SIZE = 82,
MLX4_IB_LSO_HEADER_SPARE = 128,
};
@@ -879,6 +881,8 @@
IB_LINK_LAYER_ETHERNET;
u8 mac[6];
int is_mcast;
+ u16 vlan_tag;
+ int vidx;
path->grh_mylmc = ah->src_path_bits & 0x7f;
path->rlid = cpu_to_be16(ah->dlid);
@@ -907,10 +911,10 @@
memcpy(path->rgid, ah->grh.dgid.raw, 16);
}
- path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
- ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
-
if (is_eth) {
+ path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
+ ((port - 1) << 6) | ((ah->sl & 7) << 3) | ((ah->sl & 8) >> 1);
+
if (!(ah->ah_flags & IB_AH_GRH))
return -1;
@@ -922,7 +926,18 @@
path->ackto = MLX4_IB_LINK_TYPE_ETH;
/* use index 0 into MAC table for IBoE */
path->grh_mylmc &= 0x80;
- }
+
+ vlan_tag = rdma_get_vlan_id(&dev->iboe.gid_table[port - 1][ah->grh.sgid_index]);
+ if (vlan_tag < 0x1000) {
+ if (mlx4_find_cached_vlan(dev->dev, port, vlan_tag, &vidx))
+ return -ENOENT;
+
+ path->vlan_index = vidx;
+ path->fl = 1 << 6;
+ }
+ } else
+ path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
+ ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
return 0;
}
@@ -1277,13 +1292,16 @@
struct mlx4_wqe_mlx_seg *mlx = wqe;
struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
+ union ib_gid sgid;
u16 pkey;
int send_size;
int header_size;
int spc;
int i;
int is_eth;
+ int is_vlan = 0;
int is_grh;
+ u16 vlan;
send_size = 0;
for (i = 0; i < wr->num_sge; ++i)
@@ -1291,7 +1309,13 @@
is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
is_grh = mlx4_ib_ah_grh_present(ah);
- ib_ud_header_init(send_size, !is_eth, is_eth, 0, is_grh, 0, &sqp->ud_header);
+ if (is_eth) {
+ ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.ib.port_pd) >> 24,
+ ah->av.ib.gid_index, &sgid);
+ vlan = rdma_get_vlan_id(&sgid);
+ is_vlan = vlan < 0x1000;
+ }
+ ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
if (!is_eth) {
sqp->ud_header.lrh.service_level =
@@ -1345,7 +1369,15 @@
memcpy(sqp->ud_header.eth.smac_h, smac, 6);
if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
- sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
+ if (!is_vlan) {
+ sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
+ } else {
+ u16 pcp;
+
+ sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
+ pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 27 & 3) << 13;
+ sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
+ }
} else {
sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
@@ -1507,13 +1539,14 @@
}
static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
- struct ib_send_wr *wr)
+ struct ib_send_wr *wr, __be16 *vlan)
{
memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
+ *vlan = dseg->vlan;
}
static void set_mlx_icrc_seg(void *dseg)
@@ -1616,6 +1649,7 @@
__be32 uninitialized_var(lso_hdr_sz);
__be32 blh;
int i;
+ __be16 vlan = cpu_to_be16(0xffff);
spin_lock_irqsave(&qp->sq.lock, flags);
@@ -1719,7 +1753,7 @@
break;
case IB_QPT_UD:
- set_datagram_seg(wqe, wr);
+ set_datagram_seg(wqe, wr, &vlan);
wqe += sizeof (struct mlx4_wqe_datagram_seg);
size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
@@ -1797,6 +1831,11 @@
ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
(ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
+ if (be16_to_cpu(vlan) < 0x1000) {
+ ctrl->ins_vlan = 1 << 6;
+ ctrl->vlan_tag = vlan;
+ }
+
stamp = ind + qp->sq_spare_wqes;
ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
@@ -1946,17 +1985,27 @@
return ib_flags;
}
-static void to_ib_ah_attr(struct mlx4_dev *dev, struct ib_ah_attr *ib_ah_attr,
+static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
struct mlx4_qp_path *path)
{
+ struct mlx4_dev *dev = ibdev->dev;
+ int is_eth;
+
memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
return;
+ is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
+ IB_LINK_LAYER_ETHERNET;
+ if (is_eth)
+ ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
+ ((path->sched_queue & 4) << 1);
+ else
+ ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
+
ib_ah_attr->dlid = be16_to_cpu(path->rlid);
- ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
@@ -2009,8 +2058,8 @@
to_ib_qp_access_flags(be32_to_cpu(context.params2));
if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
- to_ib_ah_attr(dev->dev, &qp_attr->ah_attr, &context.pri_path);
- to_ib_ah_attr(dev->dev, &qp_attr->alt_ah_attr, &context.alt_path);
+ to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
+ to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
}