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>
This commit is contained in:
Eli Cohen
Roland Dreier
parent
fa417f7b52
commit
af7bd46376
@ -1791,6 +1791,7 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
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struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
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struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
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struct net_device *ndev = NULL;
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u16 vid;
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if (src_addr->sin_family != dst_addr->sin_family)
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return -EINVAL;
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@ -1810,14 +1811,6 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
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route->num_paths = 1;
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iboe_mac_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr);
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iboe_mac_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr);
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route->path_rec->hop_limit = 1;
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route->path_rec->reversible = 1;
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route->path_rec->pkey = cpu_to_be16(0xffff);
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route->path_rec->mtu_selector = IB_SA_EQ;
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if (addr->dev_addr.bound_dev_if)
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ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
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if (!ndev) {
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@ -1825,6 +1818,17 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
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goto err2;
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}
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vid = rdma_vlan_dev_vlan_id(ndev);
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iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
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iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
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route->path_rec->hop_limit = 1;
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route->path_rec->reversible = 1;
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route->path_rec->pkey = cpu_to_be16(0xffff);
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route->path_rec->mtu_selector = IB_SA_EQ;
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route->path_rec->sl = id_priv->tos >> 5;
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route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
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route->path_rec->rate_selector = IB_SA_EQ;
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route->path_rec->rate = iboe_get_rate(ndev);
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@ -587,13 +587,21 @@ static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp,
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struct rdma_route *route)
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{
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struct rdma_dev_addr *dev_addr;
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struct net_device *dev;
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u16 vid = 0;
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resp->num_paths = route->num_paths;
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switch (route->num_paths) {
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case 0:
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dev_addr = &route->addr.dev_addr;
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iboe_mac_to_ll((union ib_gid *) &resp->ib_route[0].dgid,
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dev_addr->dst_dev_addr);
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dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
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if (dev) {
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vid = rdma_vlan_dev_vlan_id(dev);
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dev_put(dev);
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}
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iboe_mac_vlan_to_ll((union ib_gid *) &resp->ib_route[0].dgid,
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dev_addr->dst_dev_addr, vid);
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iboe_addr_get_sgid(dev_addr,
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(union ib_gid *) &resp->ib_route[0].sgid);
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resp->ib_route[0].pkey = cpu_to_be16(0xffff);
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@ -33,6 +33,7 @@
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/if_ether.h>
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#include <rdma/ib_pack.h>
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@ -103,6 +104,17 @@ static const struct ib_field eth_table[] = {
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.size_bits = 16 }
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};
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static const struct ib_field vlan_table[] = {
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{ STRUCT_FIELD(vlan, tag),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 16 },
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{ STRUCT_FIELD(vlan, type),
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.offset_words = 0,
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.offset_bits = 16,
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.size_bits = 16 }
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};
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static const struct ib_field grh_table[] = {
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{ STRUCT_FIELD(grh, ip_version),
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.offset_words = 0,
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@ -205,6 +217,7 @@ static const struct ib_field deth_table[] = {
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* @payload_bytes:Length of packet payload
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* @lrh_present: specify if LRH is present
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* @eth_present: specify if Eth header is present
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* @vlan_present: packet is tagged vlan
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* @grh_present:GRH flag (if non-zero, GRH will be included)
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* @immediate_present: specify if immediate data is present
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* @header:Structure to initialize
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@ -212,6 +225,7 @@ static const struct ib_field deth_table[] = {
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void ib_ud_header_init(int payload_bytes,
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int lrh_present,
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int eth_present,
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int vlan_present,
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int grh_present,
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int immediate_present,
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struct ib_ud_header *header)
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@ -234,6 +248,9 @@ void ib_ud_header_init(int payload_bytes,
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header->lrh.packet_length = cpu_to_be16(packet_length);
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}
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if (vlan_present)
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header->eth.type = cpu_to_be16(ETH_P_8021Q);
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if (grh_present) {
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header->grh.ip_version = 6;
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header->grh.payload_length =
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@ -254,6 +271,7 @@ void ib_ud_header_init(int payload_bytes,
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header->lrh_present = lrh_present;
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header->eth_present = eth_present;
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header->vlan_present = vlan_present;
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header->grh_present = grh_present;
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header->immediate_present = immediate_present;
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}
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@ -312,6 +330,11 @@ int ib_ud_header_pack(struct ib_ud_header *header,
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&header->eth, buf + len);
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len += IB_ETH_BYTES;
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}
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if (header->vlan_present) {
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ib_pack(vlan_table, ARRAY_SIZE(vlan_table),
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&header->vlan, buf + len);
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len += IB_VLAN_BYTES;
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}
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if (header->grh_present) {
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ib_pack(grh_table, ARRAY_SIZE(grh_table),
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&header->grh, buf + len);
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@ -1291,7 +1291,7 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
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is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
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is_grh = mlx4_ib_ah_grh_present(ah);
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ib_ud_header_init(send_size, !is_eth, is_eth, is_grh, 0, &sqp->ud_header);
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ib_ud_header_init(send_size, !is_eth, is_eth, 0, is_grh, 0, &sqp->ud_header);
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if (!is_eth) {
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sqp->ud_header.lrh.service_level =
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@ -1493,7 +1493,7 @@ static int build_mlx_header(struct mthca_dev *dev, struct mthca_sqp *sqp,
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int err;
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u16 pkey;
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ib_ud_header_init(256, /* assume a MAD */ 1, 0,
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ib_ud_header_init(256, /* assume a MAD */ 1, 0, 0,
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mthca_ah_grh_present(to_mah(wr->wr.ud.ah)), 0,
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&sqp->ud_header);
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@ -39,6 +39,7 @@
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/socket.h>
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#include <linux/if_vlan.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_pack.h>
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@ -129,21 +130,41 @@ static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
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return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
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}
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static inline void iboe_mac_to_ll(union ib_gid *gid, u8 *mac)
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static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid)
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{
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memset(gid->raw, 0, 16);
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*((__be32 *) gid->raw) = cpu_to_be32(0xfe800000);
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gid->raw[12] = 0xfe;
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gid->raw[11] = 0xff;
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if (vid < 0x1000) {
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gid->raw[12] = vid & 0xff;
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gid->raw[11] = vid >> 8;
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} else {
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gid->raw[12] = 0xfe;
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gid->raw[11] = 0xff;
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}
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memcpy(gid->raw + 13, mac + 3, 3);
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memcpy(gid->raw + 8, mac, 3);
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gid->raw[8] ^= 2;
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}
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static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
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{
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return dev->priv_flags & IFF_802_1Q_VLAN ?
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vlan_dev_vlan_id(dev) : 0xffff;
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}
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static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
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union ib_gid *gid)
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{
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iboe_mac_to_ll(gid, dev_addr->src_dev_addr);
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struct net_device *dev;
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u16 vid = 0xffff;
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dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
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if (dev) {
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vid = rdma_vlan_dev_vlan_id(dev);
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dev_put(dev);
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}
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iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid);
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}
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static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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@ -244,4 +265,18 @@ static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
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mac[i] = addr->s6_addr[i + 10];
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}
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static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
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{
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u16 vid;
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vid = dgid->raw[11] << 8 | dgid->raw[12];
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return vid < 0x1000 ? vid : 0xffff;
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}
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static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
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{
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return dev->priv_flags & IFF_802_1Q_VLAN ?
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vlan_dev_real_dev(dev) : 0;
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}
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#endif /* IB_ADDR_H */
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@ -38,6 +38,7 @@
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enum {
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IB_LRH_BYTES = 8,
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IB_ETH_BYTES = 14,
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IB_VLAN_BYTES = 4,
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IB_GRH_BYTES = 40,
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IB_BTH_BYTES = 12,
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IB_DETH_BYTES = 8
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@ -219,11 +220,18 @@ struct ib_unpacked_eth {
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__be16 type;
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};
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struct ib_unpacked_vlan {
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__be16 tag;
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__be16 type;
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};
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struct ib_ud_header {
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int lrh_present;
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struct ib_unpacked_lrh lrh;
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int eth_present;
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struct ib_unpacked_eth eth;
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int vlan_present;
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struct ib_unpacked_vlan vlan;
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int grh_present;
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struct ib_unpacked_grh grh;
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struct ib_unpacked_bth bth;
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@ -245,6 +253,7 @@ void ib_unpack(const struct ib_field *desc,
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void ib_ud_header_init(int payload_bytes,
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int lrh_present,
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int eth_present,
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int vlan_present,
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int grh_present,
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int immediate_present,
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struct ib_ud_header *header);
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