From patchwork Thu May 27 15:05:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Punit Agrawal X-Patchwork-Id: 12284761 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=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 EC536C47089 for ; Thu, 27 May 2021 16:30:00 +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 AA09361074 for ; Thu, 27 May 2021 16:30:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AA09361074 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vmotJy/OzdG2RG36QijuLt2TRImc0ZqB5/SIDIjHnuA=; b=rXVfC7LYtLMKTo ki4ovwC6efHP36jbp40ir9nFKvXvZ70OknVAvtiMrxwNsTJHbhboimtrU7gspnCVJEqXFlrFblRQa WzVE/Sfzjt2SPnHglgLm1qZXc4o0vvyR2t/6aChGgGhahXhFFDLQrdfOKH0yFz7nToDwR3mVH18ao LGNVfC3wGaUegUfBsOY5yywdsFp3bNKGqLn6CcsrqPU2sweutDSgAtEC9EH/fjHLrUM2FrWg81OWQ eC0XDCKqe+DuDx8+gq1nmtt820Rnw/no+9XdwbQDs+dTeuFSq/QVoOVVP3K0zoe9OXFIrCvgUCUsN 1j9fna0M5xB7xfVYl+pA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lmIpt-007b7a-Mf; Thu, 27 May 2021 16:26:18 +0000 Received: from mail-pg1-x530.google.com ([2607:f8b0:4864:20::530]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lmHb8-0072NM-VS; Thu, 27 May 2021 15:07:00 +0000 Received: by mail-pg1-x530.google.com with SMTP id t193so155073pgb.4; Thu, 27 May 2021 08:06:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=iACzWLVmLzVGbDObuCyVoRniRyVY+AS4XvWtkzM+TCA=; b=I2De53zHx9sUeH8xO92FDmgThOftuNThtNqV5rWNq1pHXmfUN4/RLRt2WmCja/ggqV T3UOSnxCHHYvO11KVWPHsJaUuSK6Qp+y+MZN6ylxeSKetTvJ+kQk9v38scgP8SX40RB1 qEIfEmnMXvWOXxPLHdr9RAUATZolBfGHEkN1jd2JlgF/PnI58EW1Afqd61Pwmkj32o/W qen5UBx6G0SCdSJ98kuukoVQ0ukfFmRVMv/jjHcxzYC5hzyyeEzzdUBip5kUCTnRYAXB Uet5pYz1KkCmoTnB+vMkX00OHqZ33+hm4Y8gMkpbNtS3xuNmbZeWwR8iCeE/Xjv+CMFR 7VNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=iACzWLVmLzVGbDObuCyVoRniRyVY+AS4XvWtkzM+TCA=; b=NLoZ5cqVsae8fAqvE68XeRUB6xVm9fxcYwI2asC2HpIiNMANvxZZEKjW/euCa0CySc x9mbN5NesY8Bl34IGem8lNDU4xAAITORovpniGZsyIqxsMj5nqYI/06DnuOZSJJqDVQD rSu2cX1JSTR6VWZ1Np66DOfxg54cD3OvD+swzNyRMNRzC4DsmLECwbqGcDr/psF1fdfp tVNTrj/HIm54TTZX2wpZR+jl0FdTH98a3KuwXHQcV/DjMdoWYmE2mVmshb3/QlPk9w9U FgVU5Zo0sTTlQYpBsH1elJP4PFAcYR939S8Oys7DKvG0HoMp+viJ4VdaYLNDU2igpb57 HsaA== X-Gm-Message-State: AOAM530iy5TCDsVcBfW52RrnjCm/k/TeyfUFgYP+MOhoZcj84wd+GekR fqWZVTpnDd1c1xiBxg37CTEZ6pM+q1pqaQ== X-Google-Smtp-Source: ABdhPJyt2y6yo8Mr4sui/jdnkdSlmaGceJ+XDZGMAA0LUyLXGITxqn+34JTAuCKZr9wZptUBvqo/rA== X-Received: by 2002:a65:6a44:: with SMTP id o4mr4078506pgu.145.1622128017670; Thu, 27 May 2021 08:06:57 -0700 (PDT) Received: from localhost (122x211x248x161.ap122.ftth.ucom.ne.jp. [122.211.248.161]) by smtp.gmail.com with ESMTPSA id mp21sm2315194pjb.50.2021.05.27.08.06.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 May 2021 08:06:57 -0700 (PDT) From: Punit Agrawal To: linux-rockchip@lists.infradead.org, linux-pci@vger.kernel.org Cc: Punit Agrawal , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alexandru.elisei@arm.com, wqu@suse.com, robin.murphy@arm.com, pgwipeout@gmail.com, ardb@kernel.org, briannorris@chromium.org, shawn.lin@rock-chips.com, helgaas@kernel.org, robh+dt@kernel.org, Bjorn Helgaas Subject: [PATCH 1/2] PCI: of: Override 64-bit flag for non-prefetchable memory below 4GB Date: Fri, 28 May 2021 00:05:41 +0900 Message-Id: <20210527150541.3130505-2-punitagrawal@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210527150541.3130505-1-punitagrawal@gmail.com> References: <20210527150541.3130505-1-punitagrawal@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210527_080659_090534_A2492639 X-CRM114-Status: GOOD ( 11.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Some host bridges advertise non-prefetable memory windows that are entirely located below 4GB but are marked as 64-bit address memory. Since commit 9d57e61bf723 ("of/pci: Add IORESOURCE_MEM_64 to resource flags for 64-bit memory addresses"), the OF PCI range parser takes a stricter view and treats 64-bit address ranges as advertised while before such ranges were treated as 32-bit. A PCI-to-PCI bridges cannot forward 64-bit non-prefetchable memory ranges. As a result, the change in behaviour due to the commit causes allocation failure for devices that are connected behind PCI host bridges modelled as PCI-to-PCI bridge and require non-prefetchable bus addresses. In order to not break platforms, override the 64-bit flag for non-prefetchable memory ranges that lie entirely below 4GB. Suggested-by: Ard Biesheuvel Link: https://lore.kernel.org/r/7a1e2ebc-f7d8-8431-d844-41a9c36a8911@arm.com Signed-off-by: Punit Agrawal Cc: Bjorn Helgaas Cc: Rob Herring --- drivers/pci/of.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/pci/of.c b/drivers/pci/of.c index da5b414d585a..b9d0bee5a088 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -565,10 +565,14 @@ static int pci_parse_request_of_pci_ranges(struct device *dev, case IORESOURCE_MEM: res_valid |= !(res->flags & IORESOURCE_PREFETCH); - if (!(res->flags & IORESOURCE_PREFETCH)) + if (!(res->flags & IORESOURCE_PREFETCH)) { if (upper_32_bits(resource_size(res))) dev_warn(dev, "Memory resource size exceeds max for 32 bits\n"); - + if ((res->flags & IORESOURCE_MEM_64) && !upper_32_bits(res->end)) { + dev_warn(dev, "Overriding 64-bit flag for non-prefetchable memory below 4GB\n"); + res->flags &= ~IORESOURCE_MEM_64; + } + } break; } } From patchwork Thu May 27 15:05:42 2021 Content-Type: text/plain; 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[122.211.248.161]) by smtp.gmail.com with ESMTPSA id t12sm2255790pjw.57.2021.05.27.08.07.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 May 2021 08:07:06 -0700 (PDT) From: Punit Agrawal To: linux-rockchip@lists.infradead.org, linux-pci@vger.kernel.org Cc: Punit Agrawal , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alexandru.elisei@arm.com, wqu@suse.com, robin.murphy@arm.com, pgwipeout@gmail.com, ardb@kernel.org, briannorris@chromium.org, shawn.lin@rock-chips.com, helgaas@kernel.org, robh+dt@kernel.org, Heiko Stuebner Subject: [PATCH 2/2] arm64: dts: rockchip: Update PCI host bridge window to 32-bit address memory Date: Fri, 28 May 2021 00:05:42 +0900 Message-Id: <20210527150541.3130505-3-punitagrawal@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210527150541.3130505-1-punitagrawal@gmail.com> References: <20210527150541.3130505-1-punitagrawal@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210527_080708_932233_242197BD X-CRM114-Status: GOOD ( 14.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The PCIe host bridge on RK3399 advertises a single 64-bit memory address range even though it lies entirely below 4GB. Previously the OF PCI range parser treated 64-bit ranges more leniently (i.e., as 32-bit), but since commit 9d57e61bf723 ("of/pci: Add IORESOURCE_MEM_64 to resource flags for 64-bit memory addresses") the code takes a stricter view and treats the ranges as advertised in the device tree (i.e, as 64-bit). The change in behaviour causes failure when allocating bus addresses to devices connected behind a PCI-to-PCI bridge that require non-prefetchable memory ranges. The allocation failure was observed for certain Samsung NVMe drives connected to RockPro64 boards. Update the host bridge window attributes to treat it as 32-bit address memory. This fixes the allocation failure observed since commit 9d57e61bf723. Reported-by: Alexandru Elisei Link: https://lore.kernel.org/r/7a1e2ebc-f7d8-8431-d844-41a9c36a8911@arm.com Suggested-by: Robin Murphy Signed-off-by: Punit Agrawal Cc: Heiko Stuebner Cc: Rob Herring --- arch/arm64/boot/dts/rockchip/rk3399.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index 634a91af8e83..4b854eb21f72 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -227,7 +227,7 @@ pcie0: pcie@f8000000 { <&pcie_phy 2>, <&pcie_phy 3>; phy-names = "pcie-phy-0", "pcie-phy-1", "pcie-phy-2", "pcie-phy-3"; - ranges = <0x83000000 0x0 0xfa000000 0x0 0xfa000000 0x0 0x1e00000>, + ranges = <0x82000000 0x0 0xfa000000 0x0 0xfa000000 0x0 0x1e00000>, <0x81000000 0x0 0xfbe00000 0x0 0xfbe00000 0x0 0x100000>; resets = <&cru SRST_PCIE_CORE>, <&cru SRST_PCIE_MGMT>, <&cru SRST_PCIE_MGMT_STICKY>, <&cru SRST_PCIE_PIPE>,