From: gregkh <gregkh@linuxfoundation•org>
To: Laurentiu Tudor <laurentiu.tudor@nxp•com>
Cc: Andrew Lunn <andrew@lunn•ch>, Stuart Yoder <stuyoder@gmail•com>,
Arnd Bergmann <arnd@arndb•de>,
Ioana Ciornei <ioana.ciornei@nxp•com>,
Linux Kernel Mailing List <linux-kernel@vger•kernel.org>,
Ruxandra Ioana Ciocoi Radulescu <ruxandra.radulescu@nxp•com>,
Razvan Stefanescu <razvan.stefanescu@nxp•com>,
Roy Pledge <roy.pledge@nxp•com>,
Networking <netdev@vger•kernel.org>
Subject: Re: [PATCH v3 2/4] bus: fsl-mc: add restool userspace support
Date: Thu, 5 Apr 2018 16:19:33 +0200 [thread overview]
Message-ID: <20180405141933.GA29178@kroah.com> (raw)
In-Reply-To: <5AC62E2A.90900@nxp.com>
On Thu, Apr 05, 2018 at 02:09:47PM +0000, Laurentiu Tudor wrote:
> Hi Greg,
>
> On 04/05/2018 03:30 PM, gregkh wrote:
> > On Thu, Apr 05, 2018 at 10:30:01AM +0000, Laurentiu Tudor wrote:
> >> Hello,
> >>
> >> My 2c below.
> >>
> >> On 04/04/2018 03:42 PM, Andrew Lunn wrote:
> >>>> I hear you. It is more complicated this way...having all these individual
> >>>> objects vs just a single "bundle" of them that represents a NIC. But, that's
> >>>> the way the DPAA2 hardware is, and we're implementing kernel support for
> >>>> the hardware as it is.
> >>>
> >>> Hi Stuart
> >>>
> >>> I see we are not making any progress here.
> >>>
> >>> So what i suggest is you post the kernel code and configuration tool
> >>> concept to netdev for a full review. You want reviews from David
> >>> Miller, Jiri Pirko, Jakub Kicinski, David Ahern, etc.
> >>>
> >>
> >> I think that the discussion steered too much towards networking related
> >> topics, while this ioctl doesn't have much to do with networking.
> >> It's just an ioctl for our mc-bus bus driver that is used to manage the
> >> devices on this bus through userspace tools.
> >> In addition, I'd drop any mention of our reference user space app
> >> (restool) to emphasize that this ioctl is not added just for a
> >> particular user space app. I think Stuart also mentioned this.
> >
> > I'm not going to take a "generic device configuration ioctl" patch
> > unless it is documented to all exactly what it does, and why it is
> > there.
>
> The ioctl() is just a simple pass-through interface to the firmware.
Ah, so a new syscall? :)
> It passes commands to the firmware and returns the response back to the
> userspace. Thus the ABI used by the firmware applies for this ioctl()
> and it is documented in detail here:
>
> https://www.nxp.com/docs/en/user-guide/DPAA2_UM.pdf
Let's wait on this until people all agree that it's ok to expose this
directly.
thanks,
greg k-h
prev parent reply other threads:[~2018-04-05 14:19 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1521818402.git.ioana.ciornei@nxp.com>
[not found] ` <d8c243a9ead2fe1375dee242aec26d1276129409.1521818402.git.ioana.ciornei@nxp.com>
[not found] ` <CAK8P3a089ZiPdp1CcVct8Kac+ejkNP8TrVpWYSr_nMGo4goO1Q@mail.gmail.com>
[not found] ` <HE1PR04MB32126A07A4B4CC7225E661E4E0A30@HE1PR04MB3212.eurprd04.prod.outlook.com>
2018-03-28 15:43 ` [PATCH v3 2/4] bus: fsl-mc: add restool userspace support Arnd Bergmann
2018-03-28 16:28 ` Andrew Lunn
2018-04-02 13:24 ` Ioana Ciornei
2018-04-02 13:44 ` Andrew Lunn
2018-04-03 11:12 ` Razvan Stefanescu
2018-04-03 13:04 ` Andrew Lunn
2018-04-03 23:57 ` Stuart Yoder
2018-04-04 1:05 ` Andrew Lunn
2018-04-04 3:22 ` Stuart Yoder
2018-04-04 12:42 ` Andrew Lunn
2018-04-05 4:24 ` Stuart Yoder
2018-04-05 10:30 ` Laurentiu Tudor
2018-04-05 11:47 ` Andrew Lunn
2018-04-05 12:16 ` Laurentiu Tudor
2018-04-05 12:48 ` Andrew Lunn
2018-04-05 14:43 ` Laurentiu Tudor
2018-04-05 15:23 ` Andrew Lunn
2018-04-05 15:35 ` Ruxandra Ioana Ciocoi Radulescu
2018-04-05 16:12 ` gregkh
2018-04-05 16:56 ` Andrew Lunn
2018-04-05 12:30 ` gregkh
2018-04-05 14:09 ` Laurentiu Tudor
2018-04-05 14:19 ` gregkh [this message]
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