Re: [PATCH v8 00/23] IB/Verbs: IB Management Helpers

[Michael Wang <yun.wang-EIkl63zCoXaH+58JC4qpiA@public.gmane.org>]

On 05/12/2015 02:27 AM, Doug Ledford wrote:
> On Mon, 2015-05-11 at 19:49 -0400, ira.weiny wrote:
>> I have run with this series and the only issue I have found is not with this
>> patch set directly.
>>
>> This patch:
>>
>>>   IB/Verbs: Use management helper rdma_cap_ib_mad()
>>
>> causes an error when you actually use the port passed from the ib_umad module.
>> I have a patch to fix that which I found while trying to build on this series
>> for the use of a bit mask.
>>
>> Doug, I don't know what you would like to do for this fix.  I am submitting it
>> shortly with a new version of the core capability bit patches.  If you want to
>> just add it after this series or force Michael to respin with the fix?
> 
> As I recall, there was a comment from Or requesting to squash some of
> the individual patches down, but I no longer have that email in my Inbox
> to double check.  And it seemed like there was one other review comment
> not yet addressed.  Do I have that right Michael?  And if so, are you
> working on a v9?

AFAIK Or was asking to merge the #15~23, and want to reserve the changelog
meanwhile reply the cover of prev version (I'm still confused on that...),
I've replied but get no respond yet.

I can make a v9 to merge the #15~#23 if that could benefit the maintainability,
please let me know your opinion :-)

About the Bug, if it was not introduced in this series, maybe including the
fix in next series would be better?

Regards,
Michael Wang

> 
>>   Frankly
>> I vote for the former because as it stands this series does not break directly.
>> It was only after I changed the implementation of rdma_cap_ib_mad that it
>> broke.
>>
>>
>> For the rest of the series.
>>
>> Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>> Tested-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>> 	-- Limited to mlx4, qib, and OPA (with additional patches.)
>>
>>
>> On Tue, May 05, 2015 at 02:50:17PM +0200, Michael Wang wrote:
>>> Since v7:
>>>   * Thanks to Doug, Ira, Devesh for the testing :-)
>>>   * Thanks for the comments from or, Doug, Ira, Jason :-)
>>>     Please remind me if anything missed :-P
>>>   * Use rdma_cap_XX() instead of cap_XX() for readability
>>>   * Remove CC list in git log for maintainability
>>>   * Use bool as return value
>>>   * Updated github repository to v8
>>>
>>> There are plenty of lengthy code to check the transport type of IB device,
>>> or the link layer type of it's port, but actually we are just speculating
>>> whether a particular management/feature is supported by the device/port.
>>>
>>> Thus instead of inferring, we should have our own mechanism for IB management
>>> capability/protocol/feature checking, several proposals below.
>>>
>>> This patch set will introduce query_protocol() to check management requirement
>>> instead of inferring from transport and link layer respectively, along with
>>> the new enum on protocol type.
>>>
>>> Mapping List:
>>> 		node-type	link-layer	transport	protocol
>>> nes		RNIC		ETH		IWARP		IWARP
>>> amso1100	RNIC		ETH		IWARP		IWARP
>>> cxgb3   	RNIC		ETH		IWARP		IWARP
>>> cxgb4   	RNIC		ETH		IWARP		IWARP
>>> usnic   	USNIC_UDP	ETH		USNIC_UDP	USNIC_UDP
>>> ocrdma  	IB_CA		ETH		IB		IBOE
>>> mlx4    	IB_CA		IB/ETH		IB		IB/IBOE
>>> mlx5    	IB_CA		IB		IB		IB
>>> ehca    	IB_CA		IB		IB		IB
>>> ipath   	IB_CA		IB		IB		IB
>>> mthca   	IB_CA		IB		IB		IB
>>> qib     	IB_CA		IB		IB		IB
>>>
>>> For example:
>>> 	if (transport == IB) && (link-layer == ETH)
>>> will now become:
>>> 	if (query_protocol() == IBOE)
>>>
>>> Thus we will be able to get rid of the respective transport and link-layer
>>> checking, and it will help us to add new protocol/Technology (like OPA) more
>>> easier, also with the introduced management helpers, IB management logical
>>> will be more clear and easier for extending.
>>>
>>> Highlights:
>>>     The long CC list in each patches was complained consider about the
>>>     maintainability, it was suggested folks to provide their reviewed-by or
>>>     Acked-by instead, so for those who used to be on the CC list, please
>>>     provide your signature voluntarily :-)
>>>
>>>     The 'mgmt-helpers' branch of 'git-9UaJU3cA/F/QT0dZR+AlfA@public.gmane.org:ywang-pb/infiniband-wy.git'
>>>     contain this series based on the latest 'infiniband/for-next'
>>>
>>>     Patch 1#~14# included all the logical reform, 15#~23# introduced the
>>>     management helpers.
>>>
>>>     Doug suggested the bitmask mechanism:
>>> 	https://www.mail-archive.com/linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg23765.html
>>>     which could be the plan for future reforming, we prefer that to be another
>>>     series which focus on semantic and performance.
>>>
>>>     This patch-set is somewhat 'bloated' now and it may be a good timing for
>>>     staging, I'd like to suggest we focus on improving existed helpers and push
>>>     all the further reforms into next series ;-)
>>>
>>> Proposals:
>>>     Sean:
>>> 	https://www.mail-archive.com/linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg23339.html
>>>     Doug:
>>> 	https://www.mail-archive.com/linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg23418.html
>>> 	https://www.mail-archive.com/linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg23765.html
>>>     Jason:
>>> 	https://www.mail-archive.com/linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org/msg23425.html
>>>
>>> Michael Wang (23):
>>>   IB/Verbs: Implement new callback query_protocol()
>>>   IB/Verbs: Implement raw management helpers
>>>   IB/Verbs: Reform IB-core mad/agent/user_mad
>>>   IB/Verbs: Reform IB-core cm
>>>   IB/Verbs: Reform IB-core sa_query
>>>   IB/Verbs: Reform IB-core multicast
>>>   IB/Verbs: Reform IB-ulp ipoib
>>>   IB/Verbs: Reform IB-ulp xprtrdma
>>>   IB/Verbs: Reform IB-core verbs
>>>   IB/Verbs: Reform cm related part in IB-core cma/ucm
>>>   IB/Verbs: Reform route related part in IB-core cma
>>>   IB/Verbs: Reform mcast related part in IB-core cma
>>>   IB/Verbs: Reform cma_acquire_dev()
>>>   IB/Verbs: Reform rest part in IB-core cma
>>>   IB/Verbs: Use management helper rdma_cap_ib_mad()
>>>   IB/Verbs: Use management helper rdma_cap_ib_smi()
>>>   IB/Verbs: Use management helper rdma_cap_ib_cm()
>>>   IB/Verbs: Use management helper rdma_cap_iw_cm()
>>>   IB/Verbs: Use management helper rdma_cap_ib_sa()
>>>   IB/Verbs: Use management helper rdma_cap_ib_mcast()
>>>   IB/Verbs: Use management helper rdma_cap_read_multi_sge()
>>>   IB/Verbs: Use management helper rdma_cap_af_ib()
>>>   IB/Verbs: Use management helper rdma_cap_eth_ah()
>>>
>>>  drivers/infiniband/core/agent.c              |   2 +-
>>>  drivers/infiniband/core/cm.c                 |  20 ++-
>>>  drivers/infiniband/core/cma.c                | 257 +++++++++++----------------
>>>  drivers/infiniband/core/device.c             |   1 +
>>>  drivers/infiniband/core/mad.c                |  43 +++--
>>>  drivers/infiniband/core/multicast.c          |  12 +-
>>>  drivers/infiniband/core/sa_query.c           |  30 ++--
>>>  drivers/infiniband/core/ucm.c                |   3 +-
>>>  drivers/infiniband/core/ucma.c               |  25 +--
>>>  drivers/infiniband/core/user_mad.c           |  26 ++-
>>>  drivers/infiniband/core/verbs.c              |   6 +-
>>>  drivers/infiniband/hw/amso1100/c2_provider.c |   7 +
>>>  drivers/infiniband/hw/cxgb3/iwch_provider.c  |   7 +
>>>  drivers/infiniband/hw/cxgb4/provider.c       |   7 +
>>>  drivers/infiniband/hw/ehca/ehca_hca.c        |   6 +
>>>  drivers/infiniband/hw/ehca/ehca_iverbs.h     |   3 +
>>>  drivers/infiniband/hw/ehca/ehca_main.c       |   1 +
>>>  drivers/infiniband/hw/ipath/ipath_verbs.c    |   7 +
>>>  drivers/infiniband/hw/mlx4/main.c            |  10 ++
>>>  drivers/infiniband/hw/mlx5/main.c            |   7 +
>>>  drivers/infiniband/hw/mthca/mthca_provider.c |   7 +
>>>  drivers/infiniband/hw/nes/nes_verbs.c        |   6 +
>>>  drivers/infiniband/hw/ocrdma/ocrdma_main.c   |   1 +
>>>  drivers/infiniband/hw/ocrdma/ocrdma_verbs.c  |   6 +
>>>  drivers/infiniband/hw/ocrdma/ocrdma_verbs.h  |   3 +
>>>  drivers/infiniband/hw/qib/qib_verbs.c        |   7 +
>>>  drivers/infiniband/hw/usnic/usnic_ib_main.c  |   1 +
>>>  drivers/infiniband/hw/usnic/usnic_ib_verbs.c |   6 +
>>>  drivers/infiniband/hw/usnic/usnic_ib_verbs.h |   2 +
>>>  drivers/infiniband/ulp/ipoib/ipoib_main.c    |  15 +-
>>>  include/rdma/ib_verbs.h                      | 167 +++++++++++++++++
>>>  net/sunrpc/xprtrdma/svc_rdma_recvfrom.c      |   4 +-
>>>  net/sunrpc/xprtrdma/svc_rdma_transport.c     |  45 ++---
>>>  33 files changed, 477 insertions(+), 273 deletions(-)
>>>
>>> -- 
>>> 2.1.0
>>>
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