netdev - RE: [EXTERNAL] Re: [Patch v5 0/5] RDMA/mana

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Date: Tue, 17 Oct 2023 18:51:33 +0000
From: Ajay Sharma <sharmaajay@...rosoft.com>
To: Leon Romanovsky <leon@...nel.org>
CC: "sharmaajay@...uxonhyperv.com" <sharmaajay@...uxonhyperv.com>, Long Li
	<longli@...rosoft.com>, Jason Gunthorpe <jgg@...pe.ca>, Dexuan Cui
	<decui@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, "David S. Miller"
	<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Ajay Sharma
	<sharmaajay@...rosoft.com>
Subject: RE: [EXTERNAL] Re: [Patch v5 0/5] RDMA/mana_ib



> -----Original Message-----
> From: Leon Romanovsky <leon@...nel.org>
> Sent: Tuesday, October 17, 2023 12:48 AM
> To: Ajay Sharma <sharmaajay@...rosoft.com>
> Cc: sharmaajay@...uxonhyperv.com; Long Li <longli@...rosoft.com>; Jason
> Gunthorpe <jgg@...pe.ca>; Dexuan Cui <decui@...rosoft.com>; Wei Liu
> <wei.liu@...nel.org>; David S. Miller <davem@...emloft.net>; Eric Dumazet
> <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
> <pabeni@...hat.com>; linux-rdma@...r.kernel.org; linux-
> hyperv@...r.kernel.org; netdev@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [EXTERNAL] Re: [Patch v5 0/5] RDMA/mana_ib
> 
> On Mon, Oct 16, 2023 at 10:15:18PM +0000, Ajay Sharma wrote:
> > I have sent v7 patch series with the space removed
> >
> > > -----Original Message-----
> > > From: Leon Romanovsky <leon@...nel.org>
> > > Sent: Monday, September 18, 2023 1:29 AM
> > > To: Ajay Sharma <sharmaajay@...rosoft.com>
> > > Cc: sharmaajay@...uxonhyperv.com; Long Li <longli@...rosoft.com>;
> > > Jason Gunthorpe <jgg@...pe.ca>; Dexuan Cui <decui@...rosoft.com>;
> > > Wei Liu <wei.liu@...nel.org>; David S. Miller <davem@...emloft.net>;
> > > Eric Dumazet <edumazet@...gle.com>; Jakub Kicinski
> > > <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>;
> > > linux-rdma@...r.kernel.org; linux- hyperv@...r.kernel.org;
> > > netdev@...r.kernel.org; linux-kernel@...r.kernel.org
> > > Subject: Re: [EXTERNAL] Re: [Patch v5 0/5] RDMA/mana_ib
> > >
> > > On Mon, Sep 11, 2023 at 06:57:21PM +0000, Ajay Sharma wrote:
> > > > I have updated the last patch to use xarray, will post the update
> > > > patch. We
> > > currently use aux bus for ib device. Gd_register_device is firmware
> > > specific. All the patches use RDMA/mana_ib format which is aligned
> > > with drivers/infiniband/hw/mana/ .
> > >
> > > ➜  kernel git:(wip/leon-for-rc) git l --no-merges
> > > drivers/infiniband/hw/mana/
> > > 2145328515c8 RDMA/mana_ib: Use v2 version of cfg_rx_steer_req to
> > > enable RX coalescing
> > > 89d42b8c85b4 RDMA/mana_ib: Fix a bug when the PF indicates more
> > > entries for registering memory on first packet
> > > 563ca0e9eab8 RDMA/mana_ib: Prevent array underflow in
> > > mana_ib_create_qp_raw()
> > > 3574cfdca285 RDMA/mana: Remove redefinition of basic u64 type
> > > 0266a177631d RDMA/mana_ib: Add a driver for Microsoft Azure Network
> > > Adapter
> > >
> > > It is different format from presented here. You added extra space before ":"
> > > and there is double space in one of the titles.
> > >
> > I have removed the space
> >
> > > Regarding aux, I see it, but what confuses me is proliferation of
> > > terms and various calls: device, client, adapter. My expectation is
> > > to see more uniform methodology where IB is represented as device.
> > >
> >
> > The adapter is a software construct. It is used as a container for resources.
> > Client is used to distinguish between eth and ib.
> 
> Do you have multiple "adapters" in one ib/eth device?
> If yes, at least for IB, it will be very unexpected to see.
> 
Adapter is IB specific and one per VF/pcie device. It's the handle that is passed
between the management and VM for book keeping.
> Why do you have client and device when they are basically the same objects?
> 
I am not sure which ones you are referring to specifically , can you please elaborate?

> > Please note that these are terms used for different purposes on the
> management side.
> 
> We are discussing RDMA side of this series.
> 
> Thanks
> 
> >
> > > Thanks
> > >
> > > >
> > > > Thanks
> > > >
> > > > > -----Original Message-----
> > > > > From: Leon Romanovsky <leon@...nel.org>
> > > > > Sent: Monday, September 11, 2023 7:33 AM
> > > > > To: sharmaajay@...uxonhyperv.com
> > > > > Cc: Long Li <longli@...rosoft.com>; Jason Gunthorpe
> > > > > <jgg@...pe.ca>; Dexuan Cui <decui@...rosoft.com>; Wei Liu
> > > > > <wei.liu@...nel.org>; David S. Miller <davem@...emloft.net>;
> > > > > Eric Dumazet <edumazet@...gle.com>; Jakub Kicinski
> > > > > <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; linux-
> > > > > rdma@...r.kernel.org; linux-hyperv@...r.kernel.org;
> > > > > netdev@...r.kernel.org; linux-kernel@...r.kernel.org; Ajay
> > > > > Sharma <sharmaajay@...rosoft.com>
> > > > > Subject: [EXTERNAL] Re: [Patch v5 0/5] RDMA/mana_ib
> > > > >
> > > > > On Thu, Sep 07, 2023 at 09:52:34AM -0700,
> > > > > sharmaajay@...uxonhyperv.com
> > > > > wrote:
> > > > > > From: Ajay Sharma <sharmaajay@...rosoft.com>
> > > > > >
> > > > > > Change from v4:
> > > > > > Send qp fatal error event to the context that created the qp.
> > > > > > Add lookup table for qp.
> > > > > >
> > > > > > Ajay Sharma (5):
> > > > > >   RDMA/mana_ib : Rename all mana_ib_dev type variables to
> mib_dev
> > > > > >   RDMA/mana_ib : Register Mana IB  device with Management SW
> > > > > >   RDMA/mana_ib : Create adapter and Add error eq
> > > > > >   RDMA/mana_ib : Query adapter capabilities
> > > > > >   RDMA/mana_ib : Send event to qp
> > > > >
> > > > > I didn't look very deep into the series and has three very initial
> comments.
> > > > > 1. Please do git log drivers/infiniband/hw/mana/ and use same
> > > > > format for commit messages.
> > > > > 2. Don't invent your own index-to-qp query mechanism in last
> > > > > patch and use xarray.
> > > > > 3. Once you decided to export mana_gd_register_device, it hinted
> > > > > me that it is time to move to auxbus infrastructure.
> > > > >
> > > > > Thanks
> > > > >
> > > > > >
> > > > > >  drivers/infiniband/hw/mana/cq.c               |  12 +-
> > > > > >  drivers/infiniband/hw/mana/device.c           |  81 +++--
> > > > > >  drivers/infiniband/hw/mana/main.c             | 288 +++++++++++++-----
> > > > > >  drivers/infiniband/hw/mana/mana_ib.h          | 102 ++++++-
> > > > > >  drivers/infiniband/hw/mana/mr.c               |  42 ++-
> > > > > >  drivers/infiniband/hw/mana/qp.c               |  86 +++---
> > > > > >  drivers/infiniband/hw/mana/wq.c               |  21 +-
> > > > > >  .../net/ethernet/microsoft/mana/gdma_main.c   | 152 +++++----
> > > > > >  drivers/net/ethernet/microsoft/mana/mana_en.c |   3 +
> > > > > >  include/net/mana/gdma.h                       |  16 +-
> > > > > >  10 files changed, 545 insertions(+), 258 deletions(-)
> > > > > >
> > > > > > --
> > > > > > 2.25.1
> > > > > >