From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gerhard Pircher" Subject: Re: RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? Date: Fri, 30 Jun 2006 20:21:44 +0200 Message-ID: <20060630182144.27980@gmx.net> References: <20060628202753.198630@gmx.net> <20060629211513.64980@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@lists.sourceforge.net Errors-To: alsa-devel-bounces@lists.sourceforge.net To: Takashi Iwai Cc: linuxppc-dev@ozlabs.org, rlrevell@joe-job.com, alsa-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org List-Id: alsa-devel@alsa-project.org -------- Original-Nachricht -------- Datum: Fri, 30 Jun 2006 11:12:00 +0200 Von: Takashi Iwai An: Gerhard Pircher Betreff: Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architec= ture and ALSA? > = > What is the type of buffer are you using? If it's a buffer > pre-allocated via snd_pcm_lib_preallocate*() with SNDRV_DMA_TYPE_DEV, > there should be no snd_pcm_mmap_data_nopage call. For other types, > there can be. For example, the patch still doesn't solve the problems > with drivers using sg-buffer. > = I added a debug output and it shows a buffer of SNDRV_DMA_TYPE_DEV_SG type.= Well, then I'll hack the kernel to use the normal DMA allocation functions= for ALSA instead of the non cache coherent ones and will wait until the AL= SA core has been adapted for dma_mmap_coherent(). Or what would have to be done to get it working for SG buffers? Thanks! Gerhard -- = Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal f=FCr Modem und ISDN: http://www.gmx.net/de/go/smartsurfer Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easi= er Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1= 21642