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IB/sa: Add ib_init_ah_from_path()

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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: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty 2006-06-17 20:37:39 -07:00 committed by Roland Dreier
parent 4e00d69454
commit 6d969a471b
2 changed files with 38 additions and 0 deletions
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31
drivers/infiniband/core/sa_query.c
View File

@ -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;

7
include/rdma/ib_sa.h
View File

@ -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 */