From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751877AbcDROgA (ORCPT ); Mon, 18 Apr 2016 10:36:00 -0400 Received: from mout.kundenserver.de ([212.227.126.133]:55368 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751185AbcDROf6 (ORCPT ); Mon, 18 Apr 2016 10:35:58 -0400 From: Arnd Bergmann To: Rob Herring Cc: linux-arm-kernel@lists.infradead.org, Nava kishore Manne , mark.rutland@arm.com, devicetree@vger.kernel.org, navam@xilinx.com, hyun.kwon@xilinx.com, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, gregkh@linuxfoundation.org, radhey.shyam.pandey@xilinx.com, michal.simek@xilinx.com, balbi@ti.com, linux-kernel@vger.kernel.org, galak@codeaurora.org, soren.brinkmann@xilinx.com Subject: Re: [PATCH] Axi-usb: Add support for 64-bit addressing. Date: Mon, 18 Apr 2016 16:35:07 +0200 Message-ID: <4449845.qT8BZnpD4R@wuerfel> User-Agent: KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) In-Reply-To: <20160418142909.GA5608@rob-hp-laptop> References: <1460360506-14692-1-git-send-email-navam@xilinx.com> <4542055.HvdgVkDRYK@wuerfel> <20160418142909.GA5608@rob-hp-laptop> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:Rps4DvFiST6lX/mJD3EHJodUCtsz/ppVvpDlDujuzHOdfFSJ9a5 szYKSIOlIO9rfioNf16prFmmOz4OKITo4puuZUherlAcyvvsFjewKCufGdXsm5S6hqb4fcq 77aPsrXMi8/r3IE5MiCEWzmRgubMWVX3BzlhAuLMCSaWZHh5HBa2P0YktIxnQW/pS3/ELZx ekYyv88AOJkzm4KhA4Crw== X-UI-Out-Filterresults: notjunk:1;V01:K0:h1Lu8Kp2JMA=:OChz/rrjvZwmYc6Ex35IIx ZJn37eiwwiBr7f/NNvZ0lOSNSKafmaNpnDes5GJ8rwZFL/dG0Qgr7vQHA/A3lJn7PBXSMI99q HV3j9EUpsPwmflCy7Z+NK6d1C6uh4z6qHclxTTOHWaXHYgxEs3OD8ymwHpa+W5qBcaOuEQnKg oLIqm1BDA1ydbfVjJosoo1xBDdzbz6xJlLMyxQiTjXvbXs3E6MSlEd/3P7nU+8WH5kEj6yaMR XnVHVWQtZPWcokvN6qbIeqhlOy7f7scGLRK98huu6XTmTbNf2uKHIlC0YOgzygCt0YwWMjnuD RQF2C6M8gdJbWqhzyxz6HCcdqCKKtSUGdvLhLHo7GP8nQiZuUFKWvqUZVjObwh1saRW7qXNMV bLk4PUoTKIx279DcOO4pcP5/yEQghzZ8ZaSoRERDElwLyUtohrHfuZItvoQHyeWF6ayLyczD8 EyFM45y9zwIZhuo9EpMz5WmEO4ahyhY/3+fBvoNzCgpuWGMGOYlgFZCvcxp0CYvSlTqPs79lp YtynzUaSGpyLmASMkF2g5ipI31q6h4O4jEIziMVK4EQNkW824y9DI1o7dmUv/eTpJSrzhKc6i zflX8Ks0PgD7loMKGLyi06NQQRwEZzkmae+aZw/6qI/j0sqcweT1YuD/BwPN5XBYOeeD2fvlC 8GVbXD5EM6JnAcGbm6jFedFNb04aOmVarz+fJ2FQWLeGsq5IR79toFST6ou8aV/P3gBY+oBjw cwk3qRSp942y4XQT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday 18 April 2016 09:29:09 Rob Herring wrote: > > Right, you don't need to know the exact bus width for determining the > register/descriptor set is 32 or 64 bit addesses. I'm fine with a > property for that, but if limiting the actual connected address bits is > needed, then dma-ranges should be used. The other way round: dma-ranges is needed to allow 64-bit addressing, the default is to only allow 32-bit addressing (and arm64 has a known bug here, it just allows it anyway when it shouldn't). Arnd From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH] Axi-usb: Add support for 64-bit addressing. Date: Mon, 18 Apr 2016 16:35:07 +0200 Message-ID: <4449845.qT8BZnpD4R@wuerfel> References: <1460360506-14692-1-git-send-email-navam@xilinx.com> <4542055.HvdgVkDRYK@wuerfel> <20160418142909.GA5608@rob-hp-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160418142909.GA5608@rob-hp-laptop> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Rob Herring Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, navam@xilinx.com, pawel.moll@arm.com, hyun.kwon@xilinx.com, ijc+devicetree@hellion.org.uk, Nava kishore Manne , radhey.shyam.pandey@xilinx.com, michal.simek@xilinx.com, balbi@ti.com, linux-kernel@vger.kernel.org, galak@codeaurora.org, soren.brinkmann@xilinx.com, gregkh@linuxfoundation.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org On Monday 18 April 2016 09:29:09 Rob Herring wrote: > > Right, you don't need to know the exact bus width for determining the > register/descriptor set is 32 or 64 bit addesses. I'm fine with a > property for that, but if limiting the actual connected address bits is > needed, then dma-ranges should be used. The other way round: dma-ranges is needed to allow 64-bit addressing, the default is to only allow 32-bit addressing (and arm64 has a known bug here, it just allows it anyway when it shouldn't). Arnd From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Mon, 18 Apr 2016 16:35:07 +0200 Subject: [PATCH] Axi-usb: Add support for 64-bit addressing. In-Reply-To: <20160418142909.GA5608@rob-hp-laptop> References: <1460360506-14692-1-git-send-email-navam@xilinx.com> <4542055.HvdgVkDRYK@wuerfel> <20160418142909.GA5608@rob-hp-laptop> Message-ID: <4449845.qT8BZnpD4R@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Monday 18 April 2016 09:29:09 Rob Herring wrote: > > Right, you don't need to know the exact bus width for determining the > register/descriptor set is 32 or 64 bit addesses. I'm fine with a > property for that, but if limiting the actual connected address bits is > needed, then dma-ranges should be used. The other way round: dma-ranges is needed to allow 64-bit addressing, the default is to only allow 32-bit addressing (and arm64 has a known bug here, it just allows it anyway when it shouldn't). Arnd