From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AD19C433E0 for ; Mon, 11 Jan 2021 08:36:28 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B6D7822527 for ; Mon, 11 Jan 2021 08:36:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6D7822527 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id E415D21505; Mon, 11 Jan 2021 08:36:26 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PGCHbj+oFAeT; Mon, 11 Jan 2021 08:36:24 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 65BA0214EC; Mon, 11 Jan 2021 08:36:24 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 08225C088B; Mon, 11 Jan 2021 08:36:24 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id EBC85C013A for ; Mon, 11 Jan 2021 08:36:21 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id DAD4621505 for ; Mon, 11 Jan 2021 08:36:21 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id u8DCiWwJWz5u for ; Mon, 11 Jan 2021 08:36:20 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by silver.osuosl.org (Postfix) with ESMTPS id DE6AF2094C for ; Mon, 11 Jan 2021 08:36:19 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 7111E67373; Mon, 11 Jan 2021 09:36:14 +0100 (CET) Date: Mon, 11 Jan 2021 09:36:14 +0100 From: ". Christoph Hellwig" To: Ricardo Ribalda Subject: Re: [PATCH v3 5/6] media: uvcvideo: Use dma_alloc_noncontiguos API Message-ID: <20210111083614.GA27589@lst.de> References: <20201125221917.150463-1-ribalda@chromium.org> <20201130083410.GD32234@lst.de> <20201201033658.GE3723071@google.com> <20201201144916.GA14682@lst.de> <20201208071320.GA1667627@google.com> <20201209111639.GB22806@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Sergey Senozhatsky , Sergey Senozhatsky , Linux Doc Mailing List , Linux Kernel Mailing List , IOMMU DRIVERS , Linux Media Mailing List , Mauro Carvalho Chehab , Robin Murphy , ". Christoph Hellwig" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Jan 07, 2021 at 03:14:08PM +0100, Ricardo Ribalda wrote: > > So I think we do want these branches for coherent vs non-coherent as they > > have very different semantics and I do not think that hiding them under > > the same API helps people to understand those vastly different semantics. > > > > OTOH we should look into a fallback for DMA API instances that do not > > support the discontigous allocations. > > > > I think between your comments and those from Ricardo I have a good idea > > for a somewhat updated API. I'll try to post something in the next days. > > Did you have time to look into this? > > No hurry, I just want to make sure that I didn't miss anything ;) Haven't managed to get to it, sorry. > > Best regards! > > > > -- > Ricardo Ribalda ---end quoted text--- _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu