From patchwork Thu Nov 7 09:56:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 11232429 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 EE7DA139A for ; Thu, 7 Nov 2019 09:56:34 +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 CC3102085B for ; Thu, 7 Nov 2019 09:56:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Y/IK7oy7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CC3102085B 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=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=eNa8ZW/C5IFB0yiw3QD8okEVDTg7Vn04hUNlCvuPs28=; b=Y/IK7oy7kykjHg Rnmv5CTKht+3a1X8WYWuRw42owRG5j6soLEngoh3U/RdYK9tM3K3MmTzYe9mMvWLDvQ//P82nXvMk DlBK3iXlFxNlfKirVybDZUrAqjrKOYq78jWF2cP1HKu8eFJNUpMPWtbdmVM3cRsKKJNakmlgoF0ys NZ/vc61fB7lI7W1U2k/nTD6s7X6p6uwVYil9StbkN+nl6jmc/p3+t22RCmJED9XFTPrfWLev2ZdnG tbVCytOI9S5vFVXNC0OaNOTXaufrELyngdAHWcMBoTSqBq73E+epsul5K26oL6xhFvEWh+WN7PRv7 WG7QaN5LQCog/9HopbBQ==; 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 1iSeWn-0004zG-Sh; Thu, 07 Nov 2019 09:56:33 +0000 Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iSeWa-0004lA-UN; Thu, 07 Nov 2019 09:56:22 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A81ECB2E5; Thu, 7 Nov 2019 09:56:19 +0000 (UTC) From: Nicolas Saenz Julienne To: catalin.marinas@arm.com, linux-kernel@vger.kernel.org, Rob Herring , Mark Rutland , Eric Anholt , Stefan Wahren Subject: [PATCH v3 1/2] ARM: dts: bcm2711: force CMA into first GB of memory Date: Thu, 7 Nov 2019 10:56:10 +0100 Message-Id: <20191107095611.18429-2-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191107095611.18429-1-nsaenzjulienne@suse.de> References: <20191107095611.18429-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191107_015621_119718_3AF80B6A X-CRM114-Status: GOOD ( 12.39 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.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 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 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-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Nicolas Saenz Julienne Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org arm64 places the CMA in ZONE_DMA32, which is not good enough for the Raspberry Pi 4 since it contains peripherals that can only address the first GB of memory. Explicitly place the CMA into that area. Signed-off-by: Nicolas Saenz Julienne --- Changes since v1: - Move into bcm2711.dtsi Changes since v1: - s/Raspberry Pi/bcm2711 arch/arm/boot/dts/bcm2711.dtsi | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi index ac83dac2e6ba..667658497898 100644 --- a/arch/arm/boot/dts/bcm2711.dtsi +++ b/arch/arm/boot/dts/bcm2711.dtsi @@ -12,6 +12,26 @@ interrupt-parent = <&gicv2>; + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + ranges; + + /* + * arm64 reserves the CMA by default somewhere in ZONE_DMA32, + * that's not good enough for bcm2711 as some devices can + * only address the lower 1G of memory (ZONE_DMA). + */ + linux,cma { + compatible = "shared-dma-pool"; + size = <0x2000000>; /* 32MB */ + alloc-ranges = <0x0 0x00000000 0x40000000>; + reusable; + linux,cma-default; + }; + }; + + soc { /* * Defined ranges: