net/smc: add pnetid support

s390 hardware supports the definition of a so-call Physical NETwork
IDentifier (short PNETID) per network device port. These PNETIDS
can be used to identify network devices that are attached to the same
physical network (broadcast domain).

On s390 try to use the PNETID of the ethernet device port used for
initial connecting, and derive the IB device port used for SMC RDMA
traffic.

On platforms without PNETID support fall back to the existing
solution of a configured pnet table.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This commit is contained in:

Ursula Braun

2018-06-30 20:42:25 +09:00

committed by

David S. Miller

parent be6a3f38ff

commit 0afff91c6f

5 changed files with 114 additions and 20 deletions

									
										include/net/smc.h
									
		+2
		
												View File
												
				@@ -11,6 +11,8 @@

				#ifndef _SMC_H

				#define _SMC_H

				#define SMC_MAX_PNETID_LEN	16	/* Max. length of PNET id */

				struct smc_hashinfo {

					rwlock_t lock;

					struct hlist_head ht;