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From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: "Weiny, Ira" <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: "Hefty,
	Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>,
	Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
	"dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org"
	<dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	"bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org"
	<bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>,
	"swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org"
	<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
	"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 02/12] IB/cma: pass the port number to ib_create_qp
Date: Thu, 28 Apr 2016 18:01:46 -0600	[thread overview]
Message-ID: <20160429000146.GB2782@obsidianresearch.com> (raw)
In-Reply-To: <2807E5FD2F6FDA4886F6618EAC48510E22EC858F-8k97q/ur5Z2krb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>

On Thu, Apr 28, 2016 at 11:25:35PM +0000, Weiny, Ira wrote:

> Mellanox how hard will it be to change your drivers to that model?
> I'm not even sure how the detection of Link Layer works any more.

Hmm, I vaugely remember looking into this and thinking the mlx drivers
already did this?

It may even be that IB and rocee can do APM and could perhaps be part
of the same struct ib_device without breaking the world. I actually
have no idea.

> But all that is different from the qib/hfi case where we have 1 port
> with 2 protocols on it.  If we are going to add PSM into the core
> then I think it is _semantically_ appropriate for users to be able
> to query for the protocols supported on a port and get back more
> than 1.

That doesn't make sense, the issue here is that we have a variety of
verbs 'flavours'. PSM is not a verbs flavour.

*If* PSM gets a kAPI (nobody is talking about doing this?) *and* gains
multiple incompatible flavours (such as OPA and IB?) then it will need
a unique set of cap tests and restrictions on which physical ports can
be used together.

Jason
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  parent reply	other threads:[~2016-04-29  0:01 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-11 21:32 generic RDMA READ/WRITE API V6 Christoph Hellwig
2016-04-11 21:32 ` [PATCH 02/12] IB/cma: pass the port number to ib_create_qp Christoph Hellwig
     [not found]   ` <1460410360-13104-3-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-15 17:55     ` Sagi Grimberg
2016-04-19  3:14   ` Ira Weiny
2016-04-19 17:30     ` Jason Gunthorpe
2016-04-19 18:38       ` Christoph Hellwig
     [not found]         ` <20160419183830.GB1211-jcswGhMUV9g@public.gmane.org>
2016-04-28 21:05           ` Doug Ledford
     [not found]       ` <20160419173032.GD20844-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-04-19 18:49         ` Sagi Grimberg
2016-04-19 19:24           ` Jason Gunthorpe
     [not found]             ` <20160419192430.GB27028-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-04-19 19:41               ` Steve Wise
2016-04-19 20:05                 ` 'Christoph Hellwig'
2016-04-19 20:21                   ` Jason Gunthorpe
     [not found]                   ` <20160419200555.GA2561-jcswGhMUV9g@public.gmane.org>
2016-04-19 20:26                     ` Steve Wise
2016-04-21  3:11                       ` ira.weiny
2016-04-28 19:43               ` Hefty, Sean
2016-04-28 20:07                 ` Jason Gunthorpe
2016-04-28 21:53                   ` Hefty, Sean
2016-04-28 22:09                     ` Jason Gunthorpe
2016-04-28 23:23                       ` Hefty, Sean
2016-04-28 23:49                         ` Jason Gunthorpe
2016-04-28 23:25                       ` Weiny, Ira
     [not found]                         ` <2807E5FD2F6FDA4886F6618EAC48510E22EC858F-8k97q/ur5Z2krb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-04-29  0:01                           ` Jason Gunthorpe [this message]
2016-04-11 21:32 ` [PATCH 03/12] IB/core: allow passing mapping an offset into the SG in ib_map_mr_sg Christoph Hellwig
     [not found]   ` <1460410360-13104-4-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-15 17:56     ` Sagi Grimberg
2016-04-11 21:32 ` [PATCH 04/12] IB/core: add a helper to check for READ WITH INVALIDATE support Christoph Hellwig
     [not found]   ` <1460410360-13104-5-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-15 17:56     ` Sagi Grimberg
2016-04-19  3:15   ` Ira Weiny
2016-04-11 21:32 ` [PATCH 05/12] IB/core: refactor ib_create_qp Christoph Hellwig
2016-04-17 20:00   ` Sagi Grimberg
     [not found]   ` <1460410360-13104-6-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-19  3:08     ` Ira Weiny
2016-04-11 21:32 ` [PATCH 07/12] IB/core: add a need_inval flag to struct ib_mr Christoph Hellwig
     [not found]   ` <1460410360-13104-8-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-17 20:01     ` Sagi Grimberg
2016-04-19  3:20   ` Ira Weiny
2016-04-11 21:32 ` [PATCH 08/12] IB/core: generic RDMA READ/WRITE API Christoph Hellwig
     [not found]   ` <1460410360-13104-9-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-12 23:52     ` Bart Van Assche
     [not found]       ` <570D8A42.9040107-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-04-13 13:50         ` Christoph Hellwig
     [not found] ` <1460410360-13104-1-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-11 21:32   ` [PATCH 01/12] IB/mlx5: Expose correct max_sge_rd limit Christoph Hellwig
     [not found]     ` <1460410360-13104-2-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-17 13:53       ` Leon Romanovsky
     [not found]         ` <20160417135341.GC6349-2ukJVAZIZ/Y@public.gmane.org>
2016-04-17 18:06           ` Christoph Hellwig
2016-04-11 21:32   ` [PATCH 06/12] IB/core: add a simple MR pool Christoph Hellwig
2016-04-17 20:01     ` Sagi Grimberg
2016-04-19  3:19     ` Ira Weiny
2016-04-11 21:32   ` [PATCH 09/12] target: enhance and export target_alloc_sgl/target_free_sgl Christoph Hellwig
2016-04-11 21:32 ` [PATCH 10/12] IB/srpt: convert to the generic RDMA READ/WRITE API Christoph Hellwig
2016-04-13 18:57   ` Bart Van Assche
2016-04-14 13:32     ` Christoph Hellwig
2016-04-28 21:02       ` Doug Ledford
     [not found]         ` <57227A6D.4000802-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-29  6:34           ` Christoph Hellwig
     [not found]             ` <20160429063443.GA18893-jcswGhMUV9g@public.gmane.org>
2016-04-29 14:44               ` Doug Ledford
2016-04-11 21:32 ` [PATCH 11/12] IB/core: add RW API support for signature MRs Christoph Hellwig
     [not found]   ` <1460410360-13104-12-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-22 21:53     ` Bart Van Assche
2016-04-11 21:32 ` [PATCH 12/12] IB/isert: convert to the generic RDMA READ/WRITE API Christoph Hellwig
     [not found]   ` <1460410360-13104-13-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2016-04-28 21:04     ` Doug Ledford
2016-04-29 11:46       ` Sagi Grimberg
     [not found]         ` <572349AA.2070407-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
2016-04-29 14:45           ` Doug Ledford
     [not found]             ` <e7959da7-79ca-0422-fbc9-9b3814516e1b-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-29 16:42               ` Leon Romanovsky
2016-04-12 18:31 ` generic RDMA READ/WRITE API V6 Steve Wise
2016-04-22 22:29 ` Bart Van Assche
     [not found]   ` <571AA5C8.4080502-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-05-02 15:15     ` Christoph Hellwig
     [not found]       ` <20160502151535.GA520-jcswGhMUV9g@public.gmane.org>
2016-05-02 19:08         ` Bart Van Assche
2016-05-02 22:14           ` Bart Van Assche
2016-05-03  8:40             ` Christoph Hellwig
2016-05-03 16:10               ` Bart Van Assche
     [not found]           ` <5727A5C7.1090009-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2016-05-03 14:31             ` Christoph Hellwig
     [not found]               ` <20160503143104.GA30342-jcswGhMUV9g@public.gmane.org>
2016-05-03 21:23                 ` Bart Van Assche
2016-04-18 20:14 generic RDMA READ/WRITE API V7 Christoph Hellwig
2016-04-18 20:14 ` [PATCH 02/12] IB/cma: pass the port number to ib_create_qp Christoph Hellwig

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