Commit 1d89b1ae authored by Jack Morgenstein's avatar Jack Morgenstein Committed by Roland Dreier
Browse files

IB/mthca: Implement query_ah method 



Implement query_ah (except for AVs which are in HCA memory).  This is
needed to implement RMPP duplicate session detection on sending side
(extraction of DGID/DLID and GRH flag from address handle).

Signed-off-by: default avatarJack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 14abdffc

drivers/infiniband/hw/mthca/mthca_av.c

+31 −0
Original line number Diff line number Diff line
@@ -193,6 +193,37 @@ int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah, 
	return 0;

}



int mthca_ah_query(struct ib_ah *ibah, struct ib_ah_attr *attr)

{

	struct mthca_ah *ah   = to_mah(ibah);

	struct mthca_dev *dev = to_mdev(ibah->device);



	/* Only implement for MAD and memfree ah for now. */

	if (ah->type == MTHCA_AH_ON_HCA)

		return -ENOSYS;



	memset(attr, 0, sizeof *attr);

	attr->dlid          = be16_to_cpu(ah->av->dlid);

	attr->sl            = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;

	attr->static_rate   = ah->av->msg_sr & 0x7;

	attr->src_path_bits = ah->av->g_slid & 0x7F;

	attr->port_num      = be32_to_cpu(ah->av->port_pd) >> 24;

	attr->ah_flags      = mthca_ah_grh_present(ah) ? IB_AH_GRH : 0;



	if (attr->ah_flags) {

		attr->grh.traffic_class =

			be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20;

		attr->grh.flow_label =

			be32_to_cpu(ah->av->sl_tclass_flowlabel) & 0xfffff;

		attr->grh.hop_limit  = ah->av->hop_limit;

		attr->grh.sgid_index = ah->av->gid_index &

				       (dev->limits.gid_table_len - 1);

		memcpy(attr->grh.dgid.raw, ah->av->dgid, 16);

	}



	return 0;

}



int __devinit mthca_init_av_table(struct mthca_dev *dev)

{

	int err;

drivers/infiniband/hw/mthca/mthca_dev.h

+1 −0
Original line number Diff line number Diff line
@@ -539,6 +539,7 @@ int mthca_create_ah(struct mthca_dev *dev, 
int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah);

int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,

		  struct ib_ud_header *header);

int mthca_ah_query(struct ib_ah *ibah, struct ib_ah_attr *attr);

int mthca_ah_grh_present(struct mthca_ah *ah);



int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);

drivers/infiniband/hw/mthca/mthca_provider.c

+1 −0
Original line number Diff line number Diff line
@@ -1289,6 +1289,7 @@ int mthca_register_device(struct mthca_dev *dev) 
	dev->ib_dev.alloc_pd             = mthca_alloc_pd;

	dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;

	dev->ib_dev.create_ah            = mthca_ah_create;

	dev->ib_dev.query_ah             = mthca_ah_query;

	dev->ib_dev.destroy_ah           = mthca_ah_destroy;



	if (dev->mthca_flags & MTHCA_FLAG_SRQ) {

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