netdev - RE: [PATCH v2 net-next] net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)

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Date:   Thu, 8 Apr 2021 16:40:02 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Randy Dunlap <rdunlap@...radead.org>,
        Dexuan Cui <decui@...rosoft.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        Wei Liu <liuwe@...rosoft.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "leon@...nel.org" <leon@...nel.org>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "bernd@...rovitsch.priv.at" <bernd@...rovitsch.priv.at>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>
Subject: RE: [PATCH v2 net-next] net: mana: Add a driver for Microsoft Azure
 Network Adapter (MANA)



> -----Original Message-----
> From: Randy Dunlap <rdunlap@...radead.org>
> Sent: Thursday, April 8, 2021 12:23 PM
> To: Dexuan Cui <decui@...rosoft.com>; davem@...emloft.net;
> kuba@...nel.org; KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; wei.liu@...nel.org; Wei Liu
> <liuwe@...rosoft.com>; netdev@...r.kernel.org; leon@...nel.org;
> andrew@...n.ch; bernd@...rovitsch.priv.at
> Cc: linux-kernel@...r.kernel.org; linux-hyperv@...r.kernel.org
> Subject: Re: [PATCH v2 net-next] net: mana: Add a driver for Microsoft Azure
> Network Adapter (MANA)
> 
> On 4/8/21 2:15 AM, Dexuan Cui wrote:
> > diff --git a/drivers/net/ethernet/microsoft/Kconfig
> b/drivers/net/ethernet/microsoft/Kconfig
> > new file mode 100644
> > index 000000000000..12ef6b581566
> > --- /dev/null
> > +++ b/drivers/net/ethernet/microsoft/Kconfig
> > @@ -0,0 +1,30 @@
> > +#
> > +# Microsoft Azure network device configuration
> > +#
> > +
> > +config NET_VENDOR_MICROSOFT
> > +	bool "Microsoft Azure Network Device"
> 
> Seems to me that should be generalized, more like:
> 
> 	bool "Microsoft Network Devices"
This device is planned for Azure cloud at this time.
We will update the wording if things change.

> 
> 
> > +	default y
> > +	help
> > +	  If you have a network (Ethernet) device belonging to this class, say Y.
> > +
> > +	  Note that the answer to this question doesn't directly affect the
> > +	  kernel: saying N will just cause the configurator to skip the
> > +	  question about Microsoft Azure network device. If you say Y, you
> 
> 	           about Microsoft networking devices.
(ditto)

> 
> > +	  will be asked for your specific device in the following question.
> > +
> > +if NET_VENDOR_MICROSOFT
> > +
> > +config MICROSOFT_MANA
> > +	tristate "Microsoft Azure Network Adapter (MANA) support"
> > +	default m
> 
> Please drop the default m. We don't randomly add drivers to be built.
We will.

> 
> Or leave this as is and change NET_VENDOR_MICROSOFT to be default n.
> 
> 
> > +	depends on PCI_MSI && X86_64
> > +	select PCI_HYPERV
> > +	help
> > +	  This driver supports Microsoft Azure Network Adapter (MANA).
> > +	  So far, the driver is only validated on X86_64.
> 
> validated how?
On our pre-released HW.

Thanks,
- Haiyang