linux-kernel - Re: [PATCH] msm: smd: Add smd

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Date:	Wed, 26 Jan 2011 16:49:39 -0800
From:	Daniel Walker <dwalker@...eaurora.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	David Brown <davidb@...eaurora.org>,
	Niranjana Vishwanathapura <nvishwan@...eaurora.org>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] msm: smd: Add smd_pkt driver

On Wed, 2011-01-26 at 15:32 -0800, Andrew Morton wrote:
> On Tue, 25 Jan 2011 11:20:51 -0800
> David Brown <davidb@...eaurora.org> wrote:
> 
> > On Wed, Dec 15 2010, Niranjana Vishwanathapura wrote:
> > 
> > > Add smd_pkt driver which provides device interface
> > > to smd packet ports.
> > >
> > > Signed-off-by: Niranjana Vishwanathapura <nvishwan@...eaurora.org>
> > > ---
> > >  drivers/char/Kconfig       |    8 +
> > >  drivers/char/Makefile      |    2 +
> > >  drivers/char/msm_smd_pkt.c |  466 ++++++++++++++++++++++++++++++++++++++++++++
> > >  3 files changed, 476 insertions(+), 0 deletions(-)
> > >  create mode 100644 drivers/char/msm_smd_pkt.c
> > 
> > Andrew, what's the proper destination for this change?  Should this go
> > into your tree?  Is there anything you want me to do with this change?
> > 
> 
> Looks OK, I grabbed it.
> 
> I read the entire email trying to work out what an "SMD" is.  Failed. 
> Oh well.

+       bool "MSM Shared Memory Driver (SMD)"
+       help
+         Support for the shared memory interface between the apps
+         processor and the baseband processor.  Provides access to
+         the "shared heap", as well as virtual serial channels
+         used to communicate with various services on the baseband
+         processor.

It's an an interface from the cpu running Linux, and the other processor
that co-exists with the one running Linux. They need to communicate for
certain reasons .. I _think_ something like sending a text message is
sent by communicating over this interface, or getting the phone to dial
a number, along with many other things.

Thats my take on it anyway.

Daniel

-- 

Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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