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

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Message-ID: <fe82ab3e-fa7f-245b-d7a1-434f30a6c6d4@linux.alibaba.com>
Date:   Fri, 24 Nov 2023 21:37:56 +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 21:34, Wen Gu wrote:
> 
> 
> 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,
Wenjia.

Sorry for the typo.

> 
> 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