From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932537AbbJNX1b (ORCPT ); Wed, 14 Oct 2015 19:27:31 -0400 Received: from mail-by2on0053.outbound.protection.outlook.com ([207.46.100.53]:35115 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753990AbbJNXZv (ORCPT ); Wed, 14 Oct 2015 19:25:51 -0400 Authentication-Results: spf=none (sender IP is 165.204.84.221) smtp.mailfrom=amd.com; apm.com; dkim=none (message not signed) header.d=none;apm.com; dmarc=permerror action=none header.from=amd.com; X-WSS-ID: 0NW8H2X-07-D1Y-02 X-M-MSG: From: Suravee Suthikulpanit To: , , , CC: Lorenzo Pieralisi , Will Deacon , Catalin Marinas , , , , , , , , Suravee Suthikulpanit Subject: [PATCH V2 1/6] pci: msi: Add support to query MSI domain for pci device Date: Wed, 14 Oct 2015 16:25:51 -0700 Message-ID: <1444865156-9870-2-git-send-email-Suravee.Suthikulpanit@amd.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1444865156-9870-1-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1444865156-9870-1-git-send-email-Suravee.Suthikulpanit@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:165.204.84.221;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10009020)(6009001)(2980300002)(428002)(199003)(189002)(48376002)(64706001)(2201001)(46102003)(97736004)(2950100001)(47776003)(189998001)(53416004)(229853001)(86362001)(5001770100001)(50466002)(5007970100001)(5003600100002)(5008740100001)(5003940100001)(77096005)(19580395003)(36756003)(105586002)(87936001)(50986999)(50226001)(19580405001)(92566002)(101416001)(106466001)(76176999);DIR:OUT;SFP:1101;SCL:1;SRVR:SN1PR12MB0718;H:atltwp01.amd.com;FPR:;SPF:None;PTR:InfoDomainNonexistent;A:1;MX:1;LANG:en; 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Signed-off-by: Suravee Suthikulpanit --- drivers/pci/msi.c | 30 ++++++++++++++++++++++++++++++ include/linux/msi.h | 7 +++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index ddd59fe..2c87843 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -1327,4 +1327,34 @@ struct irq_domain *pci_msi_create_default_irq_domain(struct fwnode_handle *fwnod return domain; } + +static struct fwnode_handle *(*pci_msi_get_fwnode_cb)(struct device *dev); + +/** + * pci_msi_register_fwnode_provider - Register callback to retrieve fwnode + * @fn: The interrupt domain to retrieve + * + * This should be called by irqchip driver, which is the parent of + * the MSI domain to provide callback interface to query fwnode. + */ +void +pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *)) +{ + pci_msi_get_fwnode_cb = fn; +} + +/** + * pci_msi_get_fwnode - Query fwnode for MSI controller of the @dev + * @dev: The device that we try to query MSI domain token for + * + * This is used to query MSI domain token when setting up MSI domain + * for a device. Returns fwnode_handle * if token found / NULL if not found + */ +struct fwnode_handle *pci_msi_get_fwnode(struct device *dev) +{ + if (pci_msi_get_fwnode_cb) + return pci_msi_get_fwnode_cb(dev); + + return NULL; +} #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */ diff --git a/include/linux/msi.h b/include/linux/msi.h index 32a24b9..ceaebf6 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -3,6 +3,7 @@ #include #include +#include struct msi_msg { u32 address_lo; /* low 32 bits of msi message address */ @@ -294,6 +295,12 @@ irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev, struct msi_desc *desc); int pci_msi_domain_check_cap(struct irq_domain *domain, struct msi_domain_info *info, struct device *dev); + +void +pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *)); + +struct fwnode_handle *pci_msi_get_fwnode(struct device *dev); + #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */ #endif /* LINUX_MSI_H */ -- 2.1.0