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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 214D6C4338F for ; Fri, 23 Jul 2021 12:56:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 01CF260E95 for ; Fri, 23 Jul 2021 12:56:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235105AbhGWMP3 convert rfc822-to-8bit (ORCPT ); Fri, 23 Jul 2021 08:15:29 -0400 Received: from mslow1.mail.gandi.net ([217.70.178.240]:46861 "EHLO mslow1.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234909AbhGWMP3 (ORCPT ); Fri, 23 Jul 2021 08:15:29 -0400 Received: from relay6-d.mail.gandi.net (unknown [217.70.183.198]) by mslow1.mail.gandi.net (Postfix) with ESMTP id 93C02CA3D7 for ; Fri, 23 Jul 2021 12:52:48 +0000 (UTC) Received: (Authenticated sender: gregory.clement@bootlin.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id ADC99C0010; Fri, 23 Jul 2021 12:52:25 +0000 (UTC) From: Gregory CLEMENT To: Pali =?utf-8?Q?Roh=C3=A1r?= , Lorenzo Pieralisi , Thomas Petazzoni , Bjorn Helgaas , Rob Herring Cc: Marek =?utf-8?Q?Beh=C3=BAn?= , Remi Pommarel , Xogium , Tomasz Maciej Nowak , Marc Zyngier , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/2] arm64: dts: marvell: armada-37xx: Extend PCIe MEM space In-Reply-To: <20210624215546.4015-3-pali@kernel.org> References: <20210624215546.4015-1-pali@kernel.org> <20210624215546.4015-3-pali@kernel.org> Date: Fri, 23 Jul 2021 14:52:25 +0200 Message-ID: <87pmv919bq.fsf@BL-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hello Pali, > Current PCIe MEM space of size 16 MB is not enough for some combination > of PCIe cards (e.g. NVMe disk together with ath11k wifi card). ARM Trusted > Firmware for Armada 3700 platform already assigns 128 MB for PCIe window, > so extend PCIe MEM space to the end of 128 MB PCIe window which allows to > allocate more PCIe BARs for more PCIe cards. > > Without this change some combination of PCIe cards cannot be used and > kernel show error messages in dmesg during initialization: > > pci 0000:00:00.0: BAR 8: no space for [mem size 0x01800000] > pci 0000:00:00.0: BAR 8: failed to assign [mem size 0x01800000] > pci 0000:00:00.0: BAR 6: assigned [mem 0xe8000000-0xe80007ff pref] > pci 0000:01:00.0: BAR 8: no space for [mem size 0x01800000] > pci 0000:01:00.0: BAR 8: failed to assign [mem size 0x01800000] > pci 0000:02:03.0: BAR 8: no space for [mem size 0x01000000] > pci 0000:02:03.0: BAR 8: failed to assign [mem size 0x01000000] > pci 0000:02:07.0: BAR 8: no space for [mem size 0x00100000] > pci 0000:02:07.0: BAR 8: failed to assign [mem size 0x00100000] > pci 0000:03:00.0: BAR 0: no space for [mem size 0x01000000 64bit] > pci 0000:03:00.0: BAR 0: failed to assign [mem size 0x01000000 64bit] > > Due to bugs in U-Boot port for Turris Mox, the second range in Turris Mox > kernel DTS file for PCIe must start at 16 MB offset. Otherwise U-Boot > crashes during loading of kernel DTB file. This bug is present only in > U-Boot code for Turris Mox and therefore other Armada 3700 devices are not > affected by this bug. Bug is fixed in U-Boot version 2021.07. > > To not break booting new kernels on existing versions of U-Boot on Turris > Mox, use first 16 MB range for IO and second range with rest of PCIe window > for MEM. Is there any depencey with the firs patch of this series ? What happend if this patch is applied without the other ? Could you test it to see if any regression occure ? Thanks, Grégory > > Signed-off-by: Pali Rohár > Fixes: 76f6386b25cc ("arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700") > --- > .../boot/dts/marvell/armada-3720-turris-mox.dts | 17 +++++++++++++++++ > arch/arm64/boot/dts/marvell/armada-37xx.dtsi | 11 +++++++++-- > 2 files changed, 26 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts > index 53e817c5f6f3..86b3025f174b 100644 > --- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts > +++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts > @@ -134,6 +134,23 @@ > pinctrl-0 = <&pcie_reset_pins &pcie_clkreq_pins>; > status = "okay"; > reset-gpios = <&gpiosb 3 GPIO_ACTIVE_LOW>; > + /* > + * U-Boot port for Turris Mox has a bug which always expects that "ranges" DT property > + * contains exactly 2 ranges with 3 (child) address cells, 2 (parent) address cells and > + * 2 size cells and also expects that the second range starts at 16 MB offset. If these > + * conditions are not met then U-Boot crashes during loading kernel DTB file. PCIe address > + * space is 128 MB long, so the best split between MEM and IO is to use fixed 16 MB window > + * for IO and the rest 112 MB (64+32+16) for MEM, despite that maximal IO size is just 64 kB. > + * This bug is not present in U-Boot ports for other Armada 3700 devices and is fixed in > + * U-Boot version 2021.07. See relevant U-Boot commits (the last one contains fix): > + * https://source.denx.de/u-boot/u-boot/-/commit/cb2ddb291ee6fcbddd6d8f4ff49089dfe580f5d7 > + * https://source.denx.de/u-boot/u-boot/-/commit/c64ac3b3185aeb3846297ad7391fc6df8ecd73bf > + * https://source.denx.de/u-boot/u-boot/-/commit/4a82fca8e330157081fc132a591ebd99ba02ee33 > + */ > + #address-cells = <3>; > + #size-cells = <2>; > + ranges = <0x81000000 0 0xe8000000 0 0xe8000000 0 0x01000000 /* Port 0 IO */ > + 0x82000000 0 0xe9000000 0 0xe9000000 0 0x07000000>; /* Port 0 MEM */ > > /* enabled by U-Boot if PCIe module is present */ > status = "disabled"; > diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi > index 7a2df148c6a3..dac3007f2ac1 100644 > --- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi > +++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi > @@ -488,8 +488,15 @@ > #interrupt-cells = <1>; > msi-parent = <&pcie0>; > msi-controller; > - ranges = <0x82000000 0 0xe8000000 0 0xe8000000 0 0x1000000 /* Port 0 MEM */ > - 0x81000000 0 0xe9000000 0 0xe9000000 0 0x10000>; /* Port 0 IO*/ > + /* > + * The 128 MiB address range [0xe8000000-0xf0000000] is > + * dedicated for PCIe and can be assigned to 8 windows > + * with size a power of two. Use one 64 KiB window for > + * IO at the end and the remaining seven windows > + * (totaling 127 MiB) for MEM. > + */ > + ranges = <0x82000000 0 0xe8000000 0 0xe8000000 0 0x07f00000 /* Port 0 MEM */ > + 0x81000000 0 0xefff0000 0 0xefff0000 0 0x00010000>; /* Port 0 IO */ > interrupt-map-mask = <0 0 0 7>; > interrupt-map = <0 0 0 1 &pcie_intc 0>, > <0 0 0 2 &pcie_intc 1>, > -- > 2.20.1 > -- Gregory Clement, Bootlin Embedded Linux and Kernel engineering http://bootlin.com 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=-15.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 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with ESMTPSA id ADC99C0010; Fri, 23 Jul 2021 12:52:25 +0000 (UTC) From: Gregory CLEMENT To: Pali =?utf-8?Q?Roh=C3=A1r?= , Lorenzo Pieralisi , Thomas Petazzoni , Bjorn Helgaas , Rob Herring Cc: Marek =?utf-8?Q?Beh=C3=BAn?= , Remi Pommarel , Xogium , Tomasz Maciej Nowak , Marc Zyngier , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/2] arm64: dts: marvell: armada-37xx: Extend PCIe MEM space In-Reply-To: <20210624215546.4015-3-pali@kernel.org> References: <20210624215546.4015-1-pali@kernel.org> <20210624215546.4015-3-pali@kernel.org> Date: Fri, 23 Jul 2021 14:52:25 +0200 Message-ID: <87pmv919bq.fsf@BL-laptop> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210723_055228_769262_F7F89675 X-CRM114-Status: GOOD ( 26.10 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: 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