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Commit 4e00d694 authored by Sean Hefty's avatar Sean Hefty Committed by Roland Dreier
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IB: Add ib_init_ah_from_wc() 



Add a function to initialize address handle attributes from a work
completion.  This functionality is duplicated by both verbs and the CM.

Signed-off-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 75af9088

drivers/infiniband/core/verbs.c

+28 −16
Original line number Original line Diff line number Diff line
@@ -125,35 +125,47 @@ struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 
}

}

EXPORT_SYMBOL(ib_create_ah);

EXPORT_SYMBOL(ib_create_ah);





struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,

int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,

				   struct ib_grh *grh, u8 port_num)

		       struct ib_grh *grh, struct ib_ah_attr *ah_attr)

{

{

	struct ib_ah_attr ah_attr;

	u32 flow_class;

	u32 flow_class;

	u16 gid_index;

	u16 gid_index;

	int ret;

	int ret;





	memset(&ah_attr, 0, sizeof ah_attr);

	memset(ah_attr, 0, sizeof *ah_attr);

	ah_attr.dlid = wc->slid;

	ah_attr->dlid = wc->slid;

	ah_attr.sl = wc->sl;

	ah_attr->sl = wc->sl;

	ah_attr.src_path_bits = wc->dlid_path_bits;

	ah_attr->src_path_bits = wc->dlid_path_bits;

	ah_attr.port_num = port_num;

	ah_attr->port_num = port_num;





	if (wc->wc_flags & IB_WC_GRH) {

	if (wc->wc_flags & IB_WC_GRH) {

		ah_attr.ah_flags = IB_AH_GRH;

		ah_attr->ah_flags = IB_AH_GRH;

		ah_attr.grh.dgid = grh->sgid;

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





		ret = ib_find_cached_gid(pd->device, &grh->dgid, &port_num,

		ret = ib_find_cached_gid(device, &grh->dgid, &port_num,

					 &gid_index);

					 &gid_index);

		if (ret)

		if (ret)

			return ERR_PTR(ret);

			return ret;





		ah_attr.grh.sgid_index = (u8) gid_index;

		ah_attr->grh.sgid_index = (u8) gid_index;

		flow_class = be32_to_cpu(grh->version_tclass_flow);

		flow_class = be32_to_cpu(grh->version_tclass_flow);

		ah_attr.grh.flow_label = flow_class & 0xFFFFF;

		ah_attr->grh.flow_label = flow_class & 0xFFFFF;

		ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;

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

		ah_attr.grh.hop_limit = grh->hop_limit;

		ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;

	}

	return 0;

}

}

EXPORT_SYMBOL(ib_init_ah_from_wc);



struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,

				   struct ib_grh *grh, u8 port_num)

{

	struct ib_ah_attr ah_attr;

	int ret;



	ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);

	if (ret)

		return ERR_PTR(ret);





	return ib_create_ah(pd, &ah_attr);

	return ib_create_ah(pd, &ah_attr);

}

}

include/rdma/ib_verbs.h

+14 −0
Original line number Original line Diff line number Diff line
@@ -1087,6 +1087,20 @@ int ib_dealloc_pd(struct ib_pd *pd); 
 */

 */

struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);

struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);





/**

 * ib_init_ah_from_wc - Initializes address handle attributes from a

 *   work completion.

 * @device: Device on which the received message arrived.

 * @port_num: Port on which the received message arrived.

 * @wc: Work completion associated with the received message.

 * @grh: References the received global route header.  This parameter is

 *   ignored unless the work completion indicates that the GRH is valid.

 * @ah_attr: Returned attributes that can be used when creating an address

 *   handle for replying to the message.

 */

int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,

		       struct ib_grh *grh, struct ib_ah_attr *ah_attr);



/**

/**

 * ib_create_ah_from_wc - Creates an address handle associated with the

 * ib_create_ah_from_wc - Creates an address handle associated with the

 *   sender of the specified work completion.

 *   sender of the specified work completion.