linux-kernel - [PATCH v2] irqchip/armada-370-xp: Enable MSI-X support

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Date:   Fri, 18 Aug 2017 14:59:26 +0200
From:   Stefan Roese <sr@...x.de>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Marc Zyngier <marc.zyngier@....com>,
        Jason Cooper <jason@...edaemon.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gregory CLEMENT <gregory.clement@...e-electrons.com>
Subject: [PATCH v2] irqchip/armada-370-xp: Enable MSI-X support

Armada XP does not only support MSI, but also MSI-X. This patch sets
the MSI_FLAG_PCI_MSIX flag in the interrupt controller driver which
is the only change necessary to enable MSI-X support on this SoC. As
the Linux PCI MSI-X infrastructure takes care of writing the data and
address structures into the BAR specified by the MSI-X controller.

Signed-off-by: Stefan Roese <sr@...x.de>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Jason Cooper <jason@...edaemon.net>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Gregory CLEMENT <gregory.clement@...e-electrons.com>
---
v2:
- Added Reviewed-by tag from Thomas
- Added usual irqchip maintainers

 drivers/irqchip/irq-armada-370-xp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 33982cbd8a57..b17039ed8735 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -124,7 +124,7 @@ static struct irq_chip armada_370_xp_msi_irq_chip = {
 
 static struct msi_domain_info armada_370_xp_msi_domain_info = {
 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		   MSI_FLAG_MULTI_PCI_MSI),
+		   MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
 	.chip	= &armada_370_xp_msi_irq_chip,
 };
 
-- 
2.12.2