From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from verein.lst.de ([213.95.11.211]:53633 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726077AbfAOPRe (ORCPT ); Tue, 15 Jan 2019 10:17:34 -0500 Date: Tue, 15 Jan 2019 16:17:32 +0100 From: Christoph Hellwig Subject: Re: use generic DMA mapping code in powerpc V4 Message-ID: <20190115151732.GA2325@lst.de> References: <71A251A5-FA06-4019-B324-7AED32F7B714@xenosoft.de> <1b0c5c21-2761-d3a3-651b-3687bb6ae694@xenosoft.de> <3504ee70-02de-049e-6402-2d530bf55a84@xenosoft.de> <23284859-bf0a-9cd5-a480-2a7fd7802056@xenosoft.de> <075f70e3-7a4a-732f-b501-05a1a8e3c853@xenosoft.de> <21f72a6a-9095-7034-f169-95e876228b2a@xenosoft.de> <27148ac2-2a92-5536-d886-2c0971ab43d9@xenosoft.de> <20190115133558.GA29225@lst.de> <685f0c06-af1b-0bec-ac03-f9bf1f7a2b35@xenosoft.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <685f0c06-af1b-0bec-ac03-f9bf1f7a2b35@xenosoft.de> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Christian Zigotzky Cc: Christoph Hellwig , linux-arch@vger.kernel.org, Darren Stevens , linux-kernel@vger.kernel.org, Julian Margetson , linux-mm@kvack.org, iommu@lists.linux-foundation.org, Paul Mackerras , Olof Johansson , linuxppc-dev@lists.ozlabs.org Message-ID: <20190115151732.fErHpP3APF6lV1AjvCWJzvU9F0PKoWEsVSKYb64PWgM@z> On Tue, Jan 15, 2019 at 02:56:34PM +0100, Christian Zigotzky wrote: > On 15 January 2019 at 2:35PM, Christoph Hellwig wrote: >> On Tue, Jan 15, 2019 at 11:55:25AM +0100, Christian Zigotzky wrote: >>> Next step: 21074ef03c0816ae158721a78cabe9035938dddd (powerpc/dma: use the >>> generic direct mapping bypass) >>> >>> git clone git://git.infradead.org/users/hch/misc.git -b powerpc-dma.6 a >>> >>> git checkout 21074ef03c0816ae158721a78cabe9035938dddd >>> >>> I was able to compile the kernel for the AmigaOne X1000 (Nemo board with PA >>> Semi PA6T-1682M SoC). It boots but the PA Semi onboard ethernet doesn't >>> work. >> Thanks. But we are exactly missing the steps that are relevant. I've >> pushed a fixed up powerpc-dma.6 tree, which will only change starting from >> the first commit that didn't link. >> >> The first commit that changed from the old one is this one: >> >> http://git.infradead.org/users/hch/misc.git/commitdiff/257002094bc5935dd63207a380d9698ab81f0775 >> >> which was that one that your compile failed on first. >> >> Thanks again for all your work! >> > Thank you! I tried the commit 240d7ecd7f6fa62e074e8a835e620047954f0b28 > (powerpc/dma: use the dma-direct allocator for coherent platforms) again. > > git clone git://git.infradead.org/users/hch/misc.git -b powerpc-dma.6 a > > git checkout 240d7ecd7f6fa62e074e8a835e620047954f0b28 > > I modified the 'dma.c' patch because of the undefined references to > '__dma_nommu_free_coherent' and '__dma_nommu_alloc_coherent': So 257002094bc5935dd63207a380d9698ab81f0775 above is the fixed version for the commit - this switched the ifdef in dma.c around that I had inverted. Can you try that one instead? And then move on with the commits after it in the updated powerpc-dma.6 branch - they are identical to the original branch except for carrying this fix forward.