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[209.132.180.67]) by mx.google.com with ESMTP id z21si201766pge.85.2017.01.18.05.09.55; Wed, 18 Jan 2017 05:09:55 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-acpi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-acpi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751441AbdARNJy (ORCPT + 7 others); Wed, 18 Jan 2017 08:09:54 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:3598 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751316AbdARNJx (ORCPT ); Wed, 18 Jan 2017 08:09:53 -0500 Received: from 172.24.1.47 (EHLO szxeml427-hub.china.huawei.com) ([172.24.1.47]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DYC24655; Wed, 18 Jan 2017 20:59:02 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by szxeml427-hub.china.huawei.com (10.82.67.182) with Microsoft SMTP Server id 14.3.235.1; Wed, 18 Jan 2017 20:58:52 +0800 From: Hanjun Guo To: Marc Zyngier , "Rafael J. Wysocki" , Lorenzo Pieralisi CC: , , , Thomas Gleixner , Greg KH , Tomasz Nowicki , Ma Jun , Kefeng Wang , "Agustin Vega-Frias" , Sinan Kaya , , , , "Matthias Brugger" , Wei Xu , Ming Lei , Hanjun Guo Subject: [PATCH v8 10/15] ACPI: platform-msi: retrieve dev id from IORT Date: Wed, 18 Jan 2017 20:55:00 +0800 Message-ID: <1484744105-53140-11-git-send-email-guohanjun@huawei.com> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1484744105-53140-1-git-send-email-guohanjun@huawei.com> References: <1484744105-53140-1-git-send-email-guohanjun@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090204.587F669F.009E, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 46fced900563178bdd40fae58995f16f Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Hanjun Guo For devices connecting to ITS, it needs dev id to identify itself, and this dev id is represented in the IORT table in named component node [1] for platform devices, so in this patch we will scan the IORT to retrieve device's dev id. With the preparation of iort_node_map_platform_id(), a new API iort_pmsi_get_dev_id() is introduced for that purpose, call it in its_pmsi_prepare() to make retrieving dev id ACPI aware. [1]: https://static.docs.arm.com/den0049/b/DEN0049B_IO_Remapping_Table.pdf Signed-off-by: Hanjun Guo Tested-by: Ming Lei Tested-by: Wei Xu Tested-by: Sinan Kaya Cc: Marc Zyngier Cc: Lorenzo Pieralisi Cc: Tomasz Nowicki Cc: Thomas Gleixner --- drivers/acpi/arm64/iort.c | 24 ++++++++++++++++++++++++ drivers/irqchip/irq-gic-v3-its-platform-msi.c | 3 ++- include/linux/acpi_iort.h | 5 +++++ 3 files changed, 31 insertions(+), 1 deletion(-) -- 1.7.12.4 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index dacf5e1..9aebb14 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -468,6 +468,30 @@ u32 iort_msi_map_rid(struct device *dev, u32 req_id) } /** + * iort_pmsi_get_dev_id() - Get the device id for a device + * @dev: The device for which the mapping is to be done. + * @dev_id: The device ID found. + * + * Returns: 0 for successful find a dev id, -ENODEV on error + */ +int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id) +{ + int i; + struct acpi_iort_node *node; + + node = iort_find_dev_node(dev); + if (!node) + return -ENODEV; + + for (i = 0; i < node->mapping_count; i++) { + if (iort_node_map_platform_id(node, dev_id, IORT_MSI_TYPE, i)) + return 0; + } + + return -ENODEV; +} + +/** * iort_dev_find_its_id() - Find the ITS identifier for a device * @dev: The device. * @req_id: Device's requester ID diff --git a/drivers/irqchip/irq-gic-v3-its-platform-msi.c b/drivers/irqchip/irq-gic-v3-its-platform-msi.c index e4ba9f4..e801fc0 100644 --- a/drivers/irqchip/irq-gic-v3-its-platform-msi.c +++ b/drivers/irqchip/irq-gic-v3-its-platform-msi.c @@ -57,7 +57,8 @@ static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev, msi_info = msi_get_domain_info(domain->parent); - ret = of_pmsi_get_dev_id(domain, dev, &dev_id); + ret = dev->of_node ? of_pmsi_get_dev_id(domain, dev, &dev_id) : + iort_pmsi_get_dev_id(dev, &dev_id); if (ret) return ret; diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 77e0809..d074c77 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -34,6 +34,7 @@ bool iort_node_match(u8 type); u32 iort_msi_map_rid(struct device *dev, u32 req_id); struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id); +int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); /* IOMMU interface */ void iort_set_dma_mask(struct device *dev); const struct iommu_ops *iort_iommu_configure(struct device *dev); @@ -45,6 +46,10 @@ static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id) static inline struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id) { return NULL; } + +static inline int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id) +{ return -ENODEV; } + /* IOMMU interface */ static inline void iort_set_dma_mask(struct device *dev) { } static inline