From patchwork Thu May 21 12:59:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 11562873 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 BDBB5138A for ; Thu, 21 May 2020 13:00:26 +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 9C19420849 for ; Thu, 21 May 2020 13:00:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dGHtLNVd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9C19420849 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+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=dQB1Ff1GDIUUU/Snc2yQi1HyKY+j+X1z5FvAGuCvJUE=; b=dGHtLNVdD8wWMr nZvEVZew73f4wPCpflurR87mGunD/OKeBf5A8/5cHVUKDHOrgwXcfzFcpe4r+C2vgCu47SZ9hKM97 OI+Hi2N+0ByEMF7H65hKROl50bSu4mdGTXqBOFNmIgZNhvPSi2bU1H1JCpxI1ZKvDlZMec4cq+hVP vX23KtOFBgWtPNdk+ZN/3ge4gUJXizPKWWXnR3EBJeNBgVJ3T4AsN5IoBySi2PSIpZe9TWNKC2TDO xzoM7S3tqcWlM7f7q3XF7wzV1oML3GTznPr/wNKLHIXh+daBZuFDLuUXbU0GP49l45veK7R3cpach R7cmjj6zifqCFcQN2iKA==; 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 1jbkoB-0007wd-U6; Thu, 21 May 2020 13:00:23 +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 1jbko8-0007ve-OB for linux-arm-kernel@lists.infradead.org; Thu, 21 May 2020 13:00:22 +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 906A91042; Thu, 21 May 2020 06:00:19 -0700 (PDT) Received: from red-moon.arm.com (unknown [10.57.29.145]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1B2DD3F305; Thu, 21 May 2020 06:00:16 -0700 (PDT) From: Lorenzo Pieralisi To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 01/12] ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC Date: Thu, 21 May 2020 13:59:57 +0100 Message-Id: <20200521130008.8266-2-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200521130008.8266-1-lorenzo.pieralisi@arm.com> References: <20200521130008.8266-1-lorenzo.pieralisi@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200521_060020_824386_D6EF32F6 X-CRM114-Status: GOOD ( 16.25 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 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 [217.140.110.172 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: devicetree@vger.kernel.org, Lorenzo Pieralisi , Marc Zyngier , Makarand Pawagi , linux-pci@vger.kernel.org, Catalin Marinas , Joerg Roedel , Hanjun Guo , "Rafael J. Wysocki" , Robin Murphy , linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, Rob Herring , Sudeep Holla , Bjorn Helgaas , Will Deacon , Diana Craciun , Laurentiu Tudor Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org When the iort_match_node_callback is invoked for a named component the match should be executed upon a device with an ACPI companion. For devices with no ACPI companion set-up the ACPI device tree must be walked in order to find the first parent node with a companion set and check the parent node against the named component entry to check whether there is a match and therefore an IORT node describing the in/out ID translation for the device has been found. Signed-off-by: Lorenzo Pieralisi Cc: Will Deacon Cc: Hanjun Guo Cc: Sudeep Holla Cc: Catalin Marinas Cc: Robin Murphy Cc: "Rafael J. Wysocki" --- drivers/acpi/arm64/iort.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 7d04424189df..7cfd77b5e6e8 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -264,15 +264,31 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node, if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) { struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; - struct acpi_device *adev = to_acpi_device_node(dev->fwnode); + struct acpi_device *adev; struct acpi_iort_named_component *ncomp; + struct device *nc_dev = dev; + + /* + * Walk the device tree to find a device with an + * ACPI companion; there is no point in scanning + * IORT for a device matching a named component if + * the device does not have an ACPI companion to + * start with. + */ + do { + adev = ACPI_COMPANION(nc_dev); + if (adev) + break; + + nc_dev = nc_dev->parent; + } while (nc_dev); if (!adev) goto out; status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf); if (ACPI_FAILURE(status)) { - dev_warn(dev, "Can't get device full path name\n"); + dev_warn(nc_dev, "Can't get device full path name\n"); goto out; }