netdev - Re: [PATCH net-next 0/7] net/smc: implement SMCv2.1 virtual ISM device support

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Date: Fri, 24 Nov 2023 21:34:41 +0800
From: Wen Gu <guwen@...ux.alibaba.com>
To: Wenjia Zhang <wenjia@...ux.ibm.com>, wintera@...ux.ibm.com,
 hca@...ux.ibm.com, gor@...ux.ibm.com, agordeev@...ux.ibm.com,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, kgraul@...ux.ibm.com, jaka@...ux.ibm.com
Cc: borntraeger@...ux.ibm.com, svens@...ux.ibm.com,
 alibuda@...ux.alibaba.com, tonylu@...ux.alibaba.com, raspl@...ux.ibm.com,
 schnelle@...ux.ibm.com, linux-s390@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 0/7] net/smc: implement SMCv2.1 virtual ISM
 device support



On 2023/11/24 21:11, Wenjia Zhang wrote:
> 
> 
> On 19.11.23 14:57, Wen Gu wrote:
>> The fourth edition of SMCv2 adds the SMC version 2.1 feature updates for
>> SMC-Dv2 with virtual ISM. Virtual ISM are created and supported mainly by
>> OS or hypervisor software, comparable to IBM ISM which is based on platform
>> firmware or hardware.
>>
>> With the introduction of virtual ISM, SMCv2.1 makes some updates:
>>
>> - Introduce feature bitmask to indicate supplemental features.
>> - Reserve a range of CHIDs for virtual ISM.
>> - Support extended GIDs (128 bits) in CLC handshake.
>>
>> So this patch set aims to implement these updates in Linux kernel. And it
>> acts as the first part of the new version of [1].
>>
>> [1] https://lore.kernel.org/netdev/1695568613-125057-1-git-send-email-guwen@linux.alibaba.com/
>>
>> Wen Gu (7):
>>    net/smc: Rename some variable 'fce' to 'fce_v2x' for clarity
>>    net/smc: support SMCv2.x supplemental features negotiation
>>    net/smc: introduce virtual ISM device support feature
>>    net/smc: define a reserved CHID range for virtual ISM devices
>>    net/smc: compatible with 128-bits extend GID of virtual ISM device
>>    net/smc: disable SEID on non-s390 archs where virtual ISM may be used
>>    net/smc: manage system EID in SMC stack instead of ISM driver
>>
>>   drivers/s390/net/ism.h     |  6 ---
>>   drivers/s390/net/ism_drv.c | 54 +++++++--------------------
>>   include/linux/ism.h        |  1 -
>>   include/net/smc.h          | 16 +++++---
>>   net/smc/af_smc.c           | 68 ++++++++++++++++++++++++++-------
>>   net/smc/smc.h              |  7 ++++
>>   net/smc/smc_clc.c          | 93 ++++++++++++++++++++++++++++++++--------------
>>   net/smc/smc_clc.h          | 22 +++++++----
>>   net/smc/smc_core.c         | 30 ++++++++++-----
>>   net/smc/smc_core.h         |  8 ++--
>>   net/smc/smc_diag.c         |  7 +++-
>>   net/smc/smc_ism.c          | 57 ++++++++++++++++++++--------
>>   net/smc/smc_ism.h          | 31 +++++++++++++++-
>>   net/smc/smc_pnet.c         |  4 +-
>>   14 files changed, 269 insertions(+), 135 deletions(-)
>>
> 
> Hi Wen Gu,
> 
> Just FYI, the review is still on going and some tests on our plateform still need to do. I'll give you my comments as 
> soon as the testing is done. I think it would be at the beginning of next week.
> 
> Thanks,
> Wenjia

Hi Wenjian,

Thank you very much. I appreciate that you help to test them on your platform since I can only test
them with loopback-ism.

And I am going to send a new version which is rebased to the latest net-next and fix two existing
comments. If the current tests have not started yet, could you please test based on my upcoming v2 ?

Thanks and regards,
Wen Gu