netdev - Re: [PATCH 2/4] misc: xgene: Add base driver for APM X-Gene SoC Queue Manager/Traffic Manager

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Message-ID: <20131220042426.GA21726@kroah.com>
Date:	Thu, 19 Dec 2013 20:24:26 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Ravi Patel <rapatel@....com>
Cc:	Arnd Bergmann <arnd@...db.de>, davem@...emloft.net,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	jcm@...hat.com, patches@....com, Keyur Chudgar <kchudgar@....com>
Subject: Re: [PATCH 2/4] misc: xgene: Add base driver for APM X-Gene SoC
 Queue Manager/Traffic Manager


A: Top-posting.
Q: What is the most annoying thing in e-mail?

http://daringfireball.net/2007/07/on_top

On Thu, Dec 19, 2013 at 07:41:13PM -0800, Ravi Patel wrote:
> There is no need to talk to this driver from userspace.
> It is a device which is used by other IO devices to communicate with each
> other, including CPU.
> For example, if CPU (software) wants to send a message to Ethernet HW (i.e.
> send packet),
> it used this driver to enqueue a message to Ethernet.
> In other direction, if Ethernet HW receives a packet, it uses QM/TM device to
> send message to
> CPU (software) to process packet.

So it's a "bus" type of thing, right?

My question of "why isn't this reflected in the driver model" still
stands.

thanks,

greg k-h
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