From patchwork Tue Jun 7 13:31:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 9161295 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 5412360572 for ; Tue, 7 Jun 2016 13:34:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 440CE2656B for ; Tue, 7 Jun 2016 13:34:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 389B827248; Tue, 7 Jun 2016 13:34:09 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CD1C42656B for ; Tue, 7 Jun 2016 13:34:08 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1bAH7T-0001lb-5O; Tue, 07 Jun 2016 13:32:35 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1bAH6U-0000qE-Os for linux-arm-kernel@lists.infradead.org; Tue, 07 Jun 2016 13:31:39 +0000 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 28E64950; Tue, 7 Jun 2016 06:31:48 -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 5F91E3F213; Tue, 7 Jun 2016 06:31:11 -0700 (PDT) From: Lorenzo Pieralisi To: iommu@lists.linux-foundation.org Subject: [RFC PATCH v2 07/15] drivers: acpi: iort: add node match function Date: Tue, 7 Jun 2016 14:31:02 +0100 Message-Id: <1465306270-27076-8-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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160607_063135_045076_AD46EB16 X-CRM114-Status: UNSURE ( 9.05 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , Marc Zyngier , Tomasz Nowicki , Joerg Roedel , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Will Deacon , Sinan Kaya , linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, Hanjun Guo , Jon Masters , Robin Murphy , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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/iort.c | 15 +++++++++++++++ include/linux/iort.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/acpi/iort.c b/drivers/acpi/iort.c index 0ba6c8a..875edde 100644 --- a/drivers/acpi/iort.c +++ b/drivers/acpi/iort.c @@ -213,6 +213,21 @@ 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_find_dev_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 5053cc3..5ebe7e5 100644 --- a/include/linux/iort.h +++ b/include/linux/iort.h @@ -27,9 +27,11 @@ 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_its_find_domain_token(int trans_id); #ifdef CONFIG_IORT_TABLE +bool iort_node_match(u8 type); u32 iort_pci_get_msi_rid(struct pci_dev *pdev, u32 req_id); struct irq_domain *iort_pci_get_domain(struct pci_dev *pdev, u32 req_id); #else +static inline bool iort_node_match(u8 type) { return false; } static inline u32 iort_pci_get_msi_rid(struct pci_dev *pdev, u32 req_id) { return req_id; } static inline struct irq_domain *