linux-kernel - [PATCH 3/3] PCI/portdrv: Add support for sharing xilinx controller irq with AER

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Date:   Wed, 1 Aug 2018 22:14:49 +0530
From:   Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
To:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <bhelgaas@...gle.com>, <rgummal@...inx.com>,
        Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
Subject: [PATCH 3/3] PCI/portdrv: Add support for sharing xilinx controller irq with AER

Xilinx ZynqMP PS PCIe does not report AER interrupts using Advanced
Error Interrupt Message Number. The controller has dedicated interrupt line
for reporting PCIe errors along with AER.

Using dedicated controller irq number for AER which is shared with misc
interrupt handler in pcie-xilinx-nwl. This irq number is set
using PCI quirk.

Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
---
 drivers/pci/pcie/portdrv_core.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index e0261ad..fa9150e 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -264,6 +264,10 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq)
 	int retval;
 	struct pcie_device *pcie;
 	struct device *device;
+#if defined(CONFIG_ARCH_ZYNQMP) && defined(CONFIG_PCIE_XILINX_NWL)
+	if (service == PCIE_PORT_SERVICE_AER && pdev->sysdata)
+		irq = *(int *)pdev->sysdata;
+#endif
 
 	pcie = kzalloc(sizeof(*pcie), GFP_KERNEL);
 	if (!pcie)
-- 
1.7.1