net/smc: add pnetid support

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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>

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Ursula Braun 2018-06-28 19:05:05 +02:00 • committed by David S. Miller

parent be6a3f38ff

commit 0afff91c6f

5 changed files with 114 additions and 20 deletions

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2

include/net/smc.h

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6

net/smc/smc_ib.c

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3

net/smc/smc_ib.h

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109

net/smc/smc_pnet.c

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net/smc/smc_pnet.h

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