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Commit 6d969a47 authored by Sean Hefty's avatar Sean Hefty Committed by Roland Dreier
Browse files

IB/sa: Add ib_init_ah_from_path() 



Add a call to initialize address handle attributes given a path record.
This is used by the CM, and would be useful for users of UD QPs.

Signed-off-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 4e00d694

drivers/infiniband/core/sa_query.c

+31 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ 


#include <rdma/ib_pack.h>

#include <rdma/ib_sa.h>

#include <rdma/ib_cache.h>



MODULE_AUTHOR("Roland Dreier");

MODULE_DESCRIPTION("InfiniBand subnet administration query support");
@@ -441,6 +442,36 @@ void ib_sa_cancel_query(int id, struct ib_sa_query *query) 
}

EXPORT_SYMBOL(ib_sa_cancel_query);



int ib_init_ah_from_path(struct ib_device *device, u8 port_num,

			 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)

{

	int ret;

	u16 gid_index;



	memset(ah_attr, 0, sizeof *ah_attr);

	ah_attr->dlid = be16_to_cpu(rec->dlid);

	ah_attr->sl = rec->sl;

	ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7f;

	ah_attr->port_num = port_num;



	if (rec->hop_limit > 1) {

		ah_attr->ah_flags = IB_AH_GRH;

		ah_attr->grh.dgid = rec->dgid;



		ret = ib_find_cached_gid(device, &rec->sgid, &port_num,

					 &gid_index);

		if (ret)

			return ret;



		ah_attr->grh.sgid_index = gid_index;

		ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);

		ah_attr->grh.hop_limit = rec->hop_limit;

		ah_attr->grh.traffic_class = rec->traffic_class;

	}

	return 0;

}

EXPORT_SYMBOL(ib_init_ah_from_path);



static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)

{

	unsigned long flags;

include/rdma/ib_sa.h

+7 −0
Original line number Diff line number Diff line
@@ -370,5 +370,12 @@ ib_sa_mcmember_rec_delete(struct ib_device *device, u8 port_num, 
					context, query);

}



/**

 * ib_init_ah_from_path - Initialize address handle attributes based on an SA

 *   path record.

 */

int ib_init_ah_from_path(struct ib_device *device, u8 port_num,

			 struct ib_sa_path_rec *rec,

			 struct ib_ah_attr *ah_attr);



#endif /* IB_SA_H */