linux-kernel - [PATCH v2 3/3] PCI: keystone: Allow AM654 PCIe Endpoint to raise MSI-X interrupt

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Message-ID: <20200225081703.8857-4-kishon@ti.com>
Date:   Tue, 25 Feb 2020 13:47:03 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Murali Karicheri <m-karicheri2@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Kishon Vijay Abraham I <kishon@...com>
CC:     <linux-pci@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Xiaowei Bao <xiaowei.bao@....com>
Subject: [PATCH v2 3/3] PCI: keystone: Allow AM654 PCIe Endpoint to raise MSI-X interrupt

AM654 PCIe EP controller has MSI-X capability register and has the
ability to raise MSI-X interrupt. Add support in pci-keystone.c
for PCIe endpoint controller in AM654 to raise MSI-X interrupts.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index c8c702c494a2..790679fdfa48 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -959,6 +959,9 @@ static int ks_pcie_am654_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
 	case PCI_EPC_IRQ_MSI:
 		dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
 		break;
+	case PCI_EPC_IRQ_MSIX:
+		dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
+		break;
 	default:
 		dev_err(pci->dev, "UNKNOWN IRQ type\n");
 		return -EINVAL;
@@ -970,7 +973,7 @@ static int ks_pcie_am654_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
 static const struct pci_epc_features ks_pcie_am654_epc_features = {
 	.linkup_notifier = false,
 	.msi_capable = true,
-	.msix_capable = false,
+	.msix_capable = true,
 	.reserved_bar = 1 << BAR_0 | 1 << BAR_1,
 	.bar_fixed_64bit = 1 << BAR_0,
 	.bar_fixed_size[2] = SZ_1M,
-- 
2.17.1