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From:   Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
To:     Bjorn Helgaas <bhelgaas@google.com>, Rob Herring <robh@kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Jingoo Han <jingoohan1@gmail.com>,
        Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
        Marc Zyngier <maz@kernel.org>
Cc:     linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org,
        Jassi Brar <jaswinder.singh@linaro.org>,
        Masami Hiramatsu <masami.hiramatsu@linaro.org>,
        Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH v10 1/3] PCI: portdrv: Add pcie_port_service_get_irq() function
Date:   Sat, 10 Apr 2021 01:22:16 +0900
Message-Id: <1617985338-19648-2-git-send-email-hayashi.kunihiko@socionext.com>
In-Reply-To: <1617985338-19648-1-git-send-email-hayashi.kunihiko@socionext.com>
References: <1617985338-19648-1-git-send-email-hayashi.kunihiko@socionext.com>
Precedence: bulk

Add pcie_port_service_get_irq() that returns the virtual IRQ number
for specified portdrv service.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pcie/portdrv.h      |  1 +
 drivers/pci/pcie/portdrv_core.c | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
index 2ff5724..628a3de 100644
--- a/drivers/pci/pcie/portdrv.h
+++ b/drivers/pci/pcie/portdrv.h
@@ -144,4 +144,5 @@ static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
 #endif /* !CONFIG_PCIE_PME */
 
 struct device *pcie_port_find_device(struct pci_dev *dev, u32 service);
+int pcie_port_service_get_irq(struct pci_dev *dev, u32 service);
 #endif /* _PORTDRV_H_ */
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index e1fed664..b60f0f3 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -477,7 +477,22 @@ struct device *pcie_port_find_device(struct pci_dev *dev,
 }
 EXPORT_SYMBOL_GPL(pcie_port_find_device);
 
+/*
+ * pcie_port_service_get_irq - get irq of the service
+ * @dev: PCI Express port the service is associated with
+ * @service: For the service to find
+ *
+ * Get IRQ number associated with given service on a pci_dev.
+ */
+int pcie_port_service_get_irq(struct pci_dev *dev, u32 service)
+{
+	struct pcie_device *pciedev;
+
+	pciedev = to_pcie_device(pcie_port_find_device(dev, service));
+
+	return pciedev->irq;
+}
+
 /**
  * pcie_port_device_remove - unregister PCI Express port service devices
  * @dev: PCI Express port the service devices to unregister are associated with
-- 
2.7.4