From patchwork Sat Oct 10 15:12:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 11830171 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2097E14D5 for ; Sat, 10 Oct 2020 15:13:34 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 E47F12227F for ; Sat, 10 Oct 2020 15:13:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="BOsTJK74" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E47F12227F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=ZaizaIB+Gn5kTvhcIwmhv2fTw/RH84C+SN4GUl8HirE=; b=BOsTJK74jhzt+r6BZ7vFRVVBfr vcmMG4HvYkH4+I4o+8u8noZwpWhtkxc0jUT9QjIu0GY/32AV8Z6bVg3vAdXPeSERmlOl6EaMyqkmj 9YuA9CgUrPALhgTR4MAg3GkVnEF4kS8VL7J5zNqasRsyRYT5Wnq1EGc24ngamA7OOdkuUhbvhcOzx NjnsZdWxVg9na3cE9skJLfFzaFSzpEMYFuseAmNzCtG/Hl8nyrVnAJwYYraiMJQxx0kDgOXjiivQs 0/q6iZHnDrRBM8UvUB1ug0gJXymGbm7S41XF7gUkCXdldrrD7qsL8JcdBQkd7pGkAv78rSbcqLg/I jfz6bHEA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kRGYY-0002Kn-5z; Sat, 10 Oct 2020 15:13:10 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kRGYC-0002Ch-KN; Sat, 10 Oct 2020 15:12:50 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 502E5ACA3; Sat, 10 Oct 2020 15:12:44 +0000 (UTC) From: Nicolas Saenz Julienne To: robh+dt@kernel.org, catalin.marinas@arm.com, hch@lst.de, ardb@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/5] arm64: Default to 32-bit wide ZONE_DMA Date: Sat, 10 Oct 2020 17:12:30 +0200 Message-Id: <20201010151235.20585-1-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201010_111248_852812_B47EAB2E X-CRM114-Status: GOOD ( 13.21 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [195.135.220.15 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [195.135.220.15 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders 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: devicetree@vger.kernel.org, linux-mm@kvack.org, jeremy.linton@arm.com, Nicolas Saenz Julienne , iommu@lists.linux-foundation.org, linux-rpi-kernel@lists.infradead.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org I realized this morning after reading Ard's patch fixing the same issue in ACPI that we can move the zone_dma_bits initialization later in the init process. This permits the use of OF to parse dma-ranges in the system. Something we though we couldn't do on previous iterations of this. The series sits on top of Ard's patch "arm64: mm: set ZONE_DMA size based on early IORT scan." --- Original cover letter Using two distinct DMA zones turned out to be problematic. Here's an attempt go back to a saner default. I tested this on both a RPi4 and QEMU. --- Changes since v1: - Parse dma-ranges instead of using machine compatible string Nicolas Saenz Julienne (5): arm64: mm: Move zone_dma_bits initialization into zone_sizes_init() of/address: Introduce of_dma_lower_bus_limit() dma-direct: Turn zone_dma_bits default value into a define arm64: mm: Dynamically resize zone_dma_bits based on system's constraints mm: Update DMA zones description arch/arm64/include/asm/processor.h | 1 + arch/arm64/mm/init.c | 12 ++++------- drivers/of/address.c | 34 ++++++++++++++++++++++++++++++ include/linux/dma-direct.h | 3 +++ include/linux/mmzone.h | 5 +++-- include/linux/of.h | 7 ++++++ kernel/dma/direct.c | 2 +- 7 files changed, 53 insertions(+), 11 deletions(-)