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RDMA/CMA: add rdma_iw_cm_id() and rdma_res_to_id() helpers

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Add a helper function for iwarp drivers to be able to map an
rdma_cm_id to an iw_cm_id.  This is useful for dumping driver specific
NLDEV/RESTRACK connection state.

Add a helper to return the rdma_cm_id pointer from the rdma_restack
pointer.  This is needed for rdma drivers to map a res entry back to
the public rdma_cm_id struct.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Steve Wise
2018-05-10 07:31:36 -07:00
committed by Doug Ledford
parent b06f2efd3b
commit fbdb0a9181
2 changed files with 31 additions and 0 deletions
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28
drivers/infiniband/core/cma.c
View File

@@ -146,6 +146,34 @@ const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
} }
EXPORT_SYMBOL(rdma_consumer_reject_data); EXPORT_SYMBOL(rdma_consumer_reject_data);
/**
* rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
* @id: Communication Identifier
*/
struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
{
struct rdma_id_private *id_priv;
id_priv = container_of(id, struct rdma_id_private, id);
if (id->device->node_type == RDMA_NODE_RNIC)
return id_priv->cm_id.iw;
return NULL;
}
EXPORT_SYMBOL(rdma_iw_cm_id);
/**
* rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
* @res: rdma resource tracking entry pointer
*/
struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
{
struct rdma_id_private *id_priv =
container_of(res, struct rdma_id_private, res);
return &id_priv->id;
}
EXPORT_SYMBOL(rdma_res_to_id);
static void cma_add_one(struct ib_device *device); static void cma_add_one(struct ib_device *device);
static void cma_remove_one(struct ib_device *device, void *client_data); static void cma_remove_one(struct ib_device *device, void *client_data);

3
include/rdma/rdma_cm.h
View File

@@ -420,4 +420,7 @@ const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid, void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
union ib_gid *dgid); union ib_gid *dgid);
struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *cm_id);
struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res);
#endif /* RDMA_CM_H */ #endif /* RDMA_CM_H */