Commit a3f5adaf authored by Eli Cohen's avatar Eli Cohen Committed by Roland Dreier
Browse files

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: default avatarEli Cohen <eli@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 252a52aa

drivers/infiniband/core/verbs.c

+16 −0
Original line number Diff line number Diff line
@@ -94,6 +94,22 @@ rdma_node_get_transport(enum rdma_node_type node_type) 
}

EXPORT_SYMBOL(rdma_node_get_transport);



enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)

{

	if (device->get_link_layer)

		return device->get_link_layer(device, port_num);



	switch (rdma_node_get_transport(device->node_type)) {

	case RDMA_TRANSPORT_IB:

		return IB_LINK_LAYER_INFINIBAND;

	case RDMA_TRANSPORT_IWARP:

		return IB_LINK_LAYER_ETHERNET;

	default:

		return IB_LINK_LAYER_UNSPECIFIED;

	}

}

EXPORT_SYMBOL(rdma_port_get_link_layer);



/* Protection domains */



struct ib_pd *ib_alloc_pd(struct ib_device *device)

include/rdma/ib_verbs.h

+11 −0
Original line number Diff line number Diff line
@@ -75,6 +75,12 @@ enum rdma_transport_type { 
enum rdma_transport_type

rdma_node_get_transport(enum rdma_node_type node_type) __attribute_const__;



enum rdma_link_layer {

	IB_LINK_LAYER_UNSPECIFIED,

	IB_LINK_LAYER_INFINIBAND,

	IB_LINK_LAYER_ETHERNET,

};



enum ib_device_cap_flags {

	IB_DEVICE_RESIZE_MAX_WR		= 1,

	IB_DEVICE_BAD_PKEY_CNTR		= (1<<1),
@@ -1010,6 +1016,8 @@ struct ib_device { 
	int		           (*query_port)(struct ib_device *device,

						 u8 port_num,

						 struct ib_port_attr *port_attr);

	enum rdma_link_layer	   (*get_link_layer)(struct ib_device *device,

						     u8 port_num);

	int		           (*query_gid)(struct ib_device *device,

						u8 port_num, int index,

						union ib_gid *gid);
@@ -1222,6 +1230,9 @@ int ib_query_device(struct ib_device *device, 
int ib_query_port(struct ib_device *device,

		  u8 port_num, struct ib_port_attr *port_attr);



enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,

					       u8 port_num);



int ib_query_gid(struct ib_device *device,

		 u8 port_num, int index, union ib_gid *gid);

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