From owner-freebsd-hackers@FreeBSD.ORG  Fri Jun 22 09:12:05 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 69693106564A;
	Fri, 22 Jun 2012 09:12:05 +0000 (UTC) (envelope-from br@jail.io)
Received: from mx.bsdpad.com (mx.bsdpad.com [46.4.68.80])
	by mx1.freebsd.org (Postfix) with ESMTP id 26A088FC15;
	Fri, 22 Jun 2012 09:12:04 +0000 (UTC)
Received: from mx.bsdpad.com ([46.4.68.80] helo=jail.io)
	by mx.bsdpad.com with esmtps (TLSv1:AES256-SHA:256)
	(Exim 4.77 (FreeBSD)) (envelope-from <br@jail.io>)
	id 1Shzu6-0001OS-Lb; Fri, 22 Jun 2012 13:11:46 +0400
Received: (from br@localhost)
	by jail.io (8.14.5/8.14.5/Submit) id q5M9Bkjb005359;
	Fri, 22 Jun 2012 09:11:46 GMT (envelope-from br)
Date: Fri, 22 Jun 2012 13:11:46 +0400
From: Ruslan Bukin <br@bsdpad.com>
To: John Baldwin <jhb@freebsd.org>
Message-ID: <20120622091146.GA5305@jail.io>
References: <20120620204441.GA63638@jail.io>
	<201206210812.41137.jhb@freebsd.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <201206210812.41137.jhb@freebsd.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: freebsd-hackers@freebsd.org
Subject: Re: newbus / snd_hdspe(4) trouble
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 22 Jun 2012 09:12:05 -0000

On Thu, Jun 21, 2012 at 08:12:41AM -0400, John Baldwin wrote:
> On Wednesday, June 20, 2012 4:44:41 pm Ruslan Bukin wrote:
> > Hi.
> > 
> > I have the problem with different behavior of snd_hdspe(4) sound card 
> > driver initialization.
> > 
> > If I load the driver by hand using kldload everything works fine,
> > but in case of loading driver at boot time (loader.conf) or compile 
> > in kernel the driver can't initialize propertly.
> > 
> > The snd_hdspe(4) driver is designed to create a pcm child device per 
> > each pair of sound channels.
> > 
> > The problem is that snd_hdspe loaded normally, but pcm child devices
> > are not appears. hdspe_pcm_probe() in driver is not called at all.
> > However snd_hdspe_pcm driver exists in kldstat -v after boot:
> >  5    1 0xffffffff81377000 a2c8     snd_hdspe.ko (/boot/kernel/snd_hdspe.ko)
> >  Contains modules:
> >  	  Id Name
> > 	      7 hdspe/snd_hdspe_pcm
> > 	      	 6 pci/snd_hdspe
> > 
> > and I have checked, device_add_child() returns not NULL.
> > 
> > I played with MODULE_DEPEND as done in snd_hda(4) but no luck.
> > What can I do to debug the problem?
> 
> The snd_hdspe driver probably needs to use DRIVER_MODULE_ORDERED() to ensure 
> the other modules in its kld are registered with new-bus before it tries to 
> attach to devices.

I have changed, but no success.

hdspe.c:
DRIVER_MODULE_ORDERED(snd_hdspe, pci, hdspe_driver, pcm_devclass, 0, 0, SI_ORDER_SECOND);

hdspe-pcm.c:
DRIVER_MODULE_ORDERED(snd_hdspe_pcm, hdspe, hdspe_pcm_driver, pcm_devclass, 0, 0, SI_ORDER_FIRST);

In this case, pcm devices are not appears neither at boot time nor by manually kldload.
In reverse order works as usual (only by manually kldload)

-Ruslan