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=-7.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 CB0D9ECE58C for ; Mon, 14 Oct 2019 20:59:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 9F47F21848 for ; Mon, 14 Oct 2019 20:59:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fQxg+dtd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F47F21848 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=gskSjRDo1OZffSG+TOyAMddbsHdHbf/MprPwhPEb8nM=; b=fQxg+dtdE17GYi mfQFIBQ63Xw9OKUuKJccxhkUTHQm2ZP+kp4fITgbVM1MfoOfo3N46CoQTL9b7r1Uk5cPX53wlbL9T BpE9ZcRo+7VAmq/guf+9DBge9EtZq3fLSQ2Ql7Vkm1EfpkHtJ1a0MCZfEHdE+nL+HQ4RM1dX48uL5 Vz8CftHvubaPlHxf63bRpODx8VzvXVQQhcgeg8ef6nvxHQBHk0XFx5+7scz8NpH0XwXcjiR8BFI/s vJH8rZMaxk1Bedbbttexdzashz65MxUiyDh96si1nbKT+svgnobkkBI06m9cqwQdM0qebzsiS0L6S TT7azvA0obPE+8rID1Aw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iK7R1-0002LP-7X; Mon, 14 Oct 2019 20:59:19 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iK7Qx-0002JB-Bo; Mon, 14 Oct 2019 20:59:16 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8A383337; Mon, 14 Oct 2019 13:59:08 -0700 (PDT) Received: from iMac-3.local (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BA5423F68E; Mon, 14 Oct 2019 13:59:06 -0700 (PDT) Date: Mon, 14 Oct 2019 21:59:00 +0100 From: Catalin Marinas To: Nicolas Saenz Julienne Subject: Re: [PATCH RFC 0/5] ARM: Raspberry Pi 4 DMA support Message-ID: <20191014205859.GA7634@iMac-3.local> References: <20191014183108.24804-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191014183108.24804-1-nsaenzjulienne@suse.de> User-Agent: Mutt/1.11.1 (2018-12-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191014_135915_447658_867E28D5 X-CRM114-Status: UNSURE ( 9.33 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, f.fainelli@gmail.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, hch@infradead.org, iommu@lists.linux-foundation.org, mbrugger@suse.com, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Robin Murphy , linux-arm-kernel@lists.infradead.org, wahrenst@gmx.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Oct 14, 2019 at 08:31:02PM +0200, Nicolas Saenz Julienne wrote: > the Raspberry Pi 4 offers up to 4GB of memory, of which only the first > is DMA capable device wide. This forces us to use of bounce buffers, > which are currently not very well supported by ARM's custom DMA ops. > Among other things the current mechanism (see dmabounce.c) isn't > suitable for high memory. Instead of fixing it, this series introduces a > way of selecting dma-direct as the default DMA ops provider which allows > for the Raspberry Pi to make use of swiotlb. I presume these patches go on top of this series: http://lkml.kernel.org/r/20190911182546.17094-1-nsaenzjulienne@suse.de which I queued here: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/zone-dma -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel