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Commit bc0f1d71 authored by Michael Wang's avatar Michael Wang Committed by Doug Ledford
Browse files

IB/Verbs: Use management helper rdma_cap_read_multi_sge() 



Introduce helper rdma_cap_read_multi_sge() to help us check if the port of an
IB device support RDMA Read Multiple Scatter-Gather Entries.

Signed-off-by: default avatarMichael Wang <yun.wang@profitbricks.com>
Reviewed-by: default avatarIra Weiny <ira.weiny@intel.com>
Tested-by: default avatarIra Weiny <ira.weiny@intel.com>
Reviewed-by: default avatarSean Hefty <sean.hefty@intel.com>
Reviewed-by: default avatarJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: default avatarDoug Ledford <dledford@redhat.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent a31ad3b0

include/rdma/ib_verbs.h

+16 −0
Original line number Diff line number Diff line
@@ -1864,6 +1864,22 @@ static inline bool rdma_cap_ib_mcast(struct ib_device *device, u8 port_num) 
	return rdma_cap_ib_sa(device, port_num);

}



/**

 * rdma_cap_read_multi_sge - Check if the port of device has the capability

 * RDMA Read Multiple Scatter-Gather Entries.

 *

 * @device: Device to be checked

 * @port_num: Port number of the device

 *

 * Return false when port of the device don't support

 * RDMA Read Multiple Scatter-Gather Entries.

 */

static inline bool rdma_cap_read_multi_sge(struct ib_device *device,

					   u8 port_num)

{

	return !rdma_protocol_iwarp(device, port_num);

}



int ib_query_gid(struct ib_device *device,

		 u8 port_num, int index, union ib_gid *gid);

net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

+2 −2
Original line number Diff line number Diff line
@@ -117,7 +117,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, 


static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count)

{

	if (rdma_protocol_iwarp(xprt->sc_cm_id->device,

	if (!rdma_cap_read_multi_sge(xprt->sc_cm_id->device,

				     xprt->sc_cm_id->port_num))

		return 1;

	else