From patchwork Mon Aug 15 15:23:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 9281361 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7A55B607FD for ; Mon, 15 Aug 2016 15:26:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6BCDD28D26 for ; Mon, 15 Aug 2016 15:26:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6083B28D30; Mon, 15 Aug 2016 15:26:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 65FAA28D26 for ; Mon, 15 Aug 2016 15:26:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932333AbcHOP01 (ORCPT ); Mon, 15 Aug 2016 11:26:27 -0400 Received: from foss.arm.com ([217.140.101.70]:41224 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752970AbcHOPYJ (ORCPT ); Mon, 15 Aug 2016 11:24:09 -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 45B11BFA; Mon, 15 Aug 2016 08:25:41 -0700 (PDT) Received: from red-moon.cambridge.arm.com (red-moon.cambridge.arm.com [10.1.206.55]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9CD8B3F32C; Mon, 15 Aug 2016 08:24:06 -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 , Nate Watterson , Dennis Chen , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 08/15] drivers: acpi: iort: add node match function Date: Mon, 15 Aug 2016 16:23:33 +0100 Message-Id: <1471274620-20754-9-git-send-email-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1471274620-20754-1-git-send-email-lorenzo.pieralisi@arm.com> References: <1471274620-20754-1-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 X-Virus-Scanned: ClamAV using ClamSMTP Device drivers (eg ARM SMMU) need to know if a specific component is part of the IORT table, so that kernel data structures are not initialized at initcalls time if the respective component is not part of the IORT table. To this end, this patch adds a trivial function that allows detecting if a given IORT node type is present or not in the ACPI table, providing an ACPI IORT equivalent for of_find_matching_node(). Signed-off-by: Lorenzo Pieralisi Cc: Hanjun Guo Cc: Tomasz Nowicki Cc: "Rafael J. Wysocki" --- drivers/acpi/arm64/iort.c | 15 +++++++++++++++ include/linux/iort.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 01a5258..f6db3d8 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -205,6 +205,21 @@ iort_scan_node(enum acpi_iort_node_type type, } static acpi_status +iort_match_callback(struct acpi_iort_node *node, void *context) +{ + return AE_OK; +} + +bool iort_node_match(u8 type) +{ + struct acpi_iort_node *node; + + node = iort_scan_node(type, iort_match_callback, NULL); + + return node != NULL; +} + +static acpi_status iort_match_node_callback(struct acpi_iort_node *node, void *context) { struct device *dev = context; diff --git a/include/linux/iort.h b/include/linux/iort.h index 666a3de..bf37aaf 100644 --- a/include/linux/iort.h +++ b/include/linux/iort.h @@ -27,6 +27,7 @@ int iort_register_domain_token(int trans_id, struct fwnode_handle *fw_node); void iort_deregister_domain_token(int trans_id); struct fwnode_handle *iort_find_domain_token(int trans_id); #ifdef CONFIG_IORT_TABLE +bool iort_node_match(u8 type); void iort_table_detect(void); u32 iort_msi_map_rid(struct device *dev, u32 req_id); struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id); @@ -34,6 +35,7 @@ int iort_set_fwnode(struct acpi_iort_node *iort_node, struct fwnode_handle *fwnode); struct fwnode_handle *iort_get_fwnode(struct acpi_iort_node *node); #else +static inline bool iort_node_match(u8 type) { return false; } static inline void iort_table_detect(void) { } static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id) { return req_id; }