IB/core: Add link layer property to ports
This patch allows ports to have different link layers: IB_LINK_LAYER_INFINIBAND or IB_LINK_LAYER_ETHERNET. This is required for adding IBoE (InfiniBand-over-Ethernet, aka RoCE) support. For devices that do not provide an implementation for querying the link layer property of a port, we return a default value based on the transport: RMA_TRANSPORT_IB nodes will return IB_LINK_LAYER_INFINIBAND and RDMA_TRANSPORT_IWARP nodes will return IB_LINK_LAYER_ETHERNET. Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -94,6 +94,22 @@ rdma_node_get_transport(enum rdma_node_type node_type)
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}
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EXPORT_SYMBOL(rdma_node_get_transport);
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enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
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{
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if (device->get_link_layer)
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return device->get_link_layer(device, port_num);
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switch (rdma_node_get_transport(device->node_type)) {
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case RDMA_TRANSPORT_IB:
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return IB_LINK_LAYER_INFINIBAND;
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case RDMA_TRANSPORT_IWARP:
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return IB_LINK_LAYER_ETHERNET;
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default:
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return IB_LINK_LAYER_UNSPECIFIED;
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}
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}
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EXPORT_SYMBOL(rdma_port_get_link_layer);
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/* Protection domains */
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struct ib_pd *ib_alloc_pd(struct ib_device *device)
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@ -75,6 +75,12 @@ enum rdma_transport_type {
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enum rdma_transport_type
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rdma_node_get_transport(enum rdma_node_type node_type) __attribute_const__;
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enum rdma_link_layer {
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IB_LINK_LAYER_UNSPECIFIED,
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IB_LINK_LAYER_INFINIBAND,
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IB_LINK_LAYER_ETHERNET,
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};
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enum ib_device_cap_flags {
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IB_DEVICE_RESIZE_MAX_WR = 1,
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IB_DEVICE_BAD_PKEY_CNTR = (1<<1),
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@ -1010,6 +1016,8 @@ struct ib_device {
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int (*query_port)(struct ib_device *device,
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u8 port_num,
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struct ib_port_attr *port_attr);
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enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
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u8 port_num);
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int (*query_gid)(struct ib_device *device,
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u8 port_num, int index,
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union ib_gid *gid);
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@ -1222,6 +1230,9 @@ int ib_query_device(struct ib_device *device,
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int ib_query_port(struct ib_device *device,
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u8 port_num, struct ib_port_attr *port_attr);
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enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
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u8 port_num);
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int ib_query_gid(struct ib_device *device,
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u8 port_num, int index, union ib_gid *gid);
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