From patchwork Tue Jun 7 13:31:00 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 631614 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3rPCKj468Kz9t0r for ; Tue, 7 Jun 2016 23:37:13 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932858AbcFGNbN (ORCPT ); Tue, 7 Jun 2016 09:31:13 -0400 Received: from foss.arm.com ([217.140.101.70]:44433 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754942AbcFGNbI (ORCPT ); Tue, 7 Jun 2016 09:31:08 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C7799445; Tue, 7 Jun 2016 06:31:42 -0700 (PDT) Received: from red-moon.cambridge.arm.com (red-moon.cambridge.arm.com [10.1.203.137]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0C4333F213; Tue, 7 Jun 2016 06:31:05 -0700 (PDT) From: Lorenzo Pieralisi To: iommu@lists.linux-foundation.org Cc: Lorenzo Pieralisi , Hanjun Guo , Tomasz Nowicki , "Rafael J. Wysocki" , Will Deacon , Marc Zyngier , Robin Murphy , Joerg Roedel , Jon Masters , Sinan Kaya , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v2 05/15] drivers: acpi: iort: add support for named component look-up Date: Tue, 7 Jun 2016 14:31:00 +0100 Message-Id: <1465306270-27076-6-git-send-email-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1465306270-27076-1-git-send-email-lorenzo.pieralisi@arm.com> References: <1465306270-27076-1-git-send-email-lorenzo.pieralisi@arm.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org ACPI IORT table allows ids translations for PCI devices (through their respective root complex) and name components (ie components identified through their ACPI namespace path). Current IORT code only allows look-up and retrieval of IORT nodes corresponding to PCI root complexes components; this patch fills the gap by adding support for named components IORT node look-ups. Signed-off-by: Lorenzo Pieralisi Cc: Hanjun Guo Cc: Tomasz Nowicki Cc: "Rafael J. Wysocki" --- drivers/acpi/iort.c | 30 +++++++++++++++++++++++++++--- 1 file changed, 27 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/iort.c b/drivers/acpi/iort.c index 7cc9880..cfdde71 100644 --- a/drivers/acpi/iort.c +++ b/drivers/acpi/iort.c @@ -215,12 +215,35 @@ iort_scan_node(enum acpi_iort_node_type type, static acpi_status iort_find_dev_callback(struct acpi_iort_node *node, void *context) { - struct acpi_iort_root_complex *pci_rc; struct device *dev = context; - struct pci_bus *bus; switch (node->type) { - case ACPI_IORT_NODE_PCI_ROOT_COMPLEX: + case ACPI_IORT_NODE_NAMED_COMPONENT: { + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_iort_named_component *ncomp; + struct acpi_device *adev = to_acpi_device_node(dev->fwnode); + + if (!adev) + break; + + ncomp = (struct acpi_iort_named_component *)node->node_data; + + if (ACPI_FAILURE(acpi_get_name(adev->handle, + ACPI_FULL_PATHNAME, &buffer))) { + pr_warn("Can't get device full path name\n"); + break; + } + + if (!strcmp(ncomp->device_name, (char *)buffer.pointer)) + return AE_OK; + + break; + } + + case ACPI_IORT_NODE_PCI_ROOT_COMPLEX: { + struct acpi_iort_root_complex *pci_rc; + struct pci_bus *bus; + bus = to_pci_bus(dev); pci_rc = (struct acpi_iort_root_complex *)node->node_data; @@ -234,6 +257,7 @@ iort_find_dev_callback(struct acpi_iort_node *node, void *context) break; } + } return AE_NOT_FOUND; }