From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH V5 RESEND 0/3] Add iommu support for hi6220 HiKey board Date: Fri, 27 Nov 2015 12:49:20 +0100 Message-ID: <20151127114920.GH24300@8bytes.org> References: <1447986309-47548-1-git-send-email-puck.chen@hisilicon.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1447986309-47548-1-git-send-email-puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Chen Feng Cc: mark.rutland-5wv7dgnIgG8@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, guodong.xu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, w.f-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, xuwei5-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, haojian.zhuang-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, puck.chen-Dw/NWeUnuQfQT0dZR+AlfA@public.gmane.org, arnd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org List-Id: devicetree@vger.kernel.org On Fri, Nov 20, 2015 at 10:25:06AM +0800, Chen Feng wrote: > eg: > struct iommu_domain *domain = iommu_domain_alloc(bus); > iommu_attach_device(domain, dev); > struct iova_domain *iovad = (struct iova_domain *)m_dev->archdata.iommu; > struct iova * t_iova = alloc_iova(iovad, size, limit_pfn, align); > iommu_map(domain, t_iova->pfn_lo << 12, phy_addr, size, port); Any reason the media subsystem should use the iommu-api directly, and not the dma-api? You can make your iommu available by adapting the common dma-iommu implementation from Robin Murphy to your iommu to make it usable through the dma-api. Joerg