linux-kernel - [PATCH v3 14/27] Irq_remapping/MSI: Use MSI chip framework to configure MSI/MSI-X irq

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Date:	Wed, 15 Oct 2014 11:07:02 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Xinwei Hu <huxinwei@...wei.com>, Wuyun <wuyun.wu@...wei.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	<linux-arch@...r.kernel.org>, <arnab.basu@...escale.com>,
	<Bharat.Bhushan@...escale.com>, <x86@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@...cle.com>,
	<xen-devel@...ts.xenproject.org>, Joerg Roedel <joro@...tes.org>,
	<iommu@...ts.linux-foundation.org>, <linux-mips@...ux-mips.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-s390@...r.kernel.org>,
	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	"Tony Luck" <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	<sparclinux@...r.kernel.org>, Chris Metcalf <cmetcalf@...era.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Lucas Stach <l.stach@...gutronix.de>,
	David Vrabel <david.vrabel@...rix.com>,
	"Sergei Shtylyov" <sergei.shtylyov@...entembedded.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Thierry Reding <thierry.reding@...il.com>,
	"Thomas Petazzoni" <thomas.petazzoni@...e-electrons.com>,
	Liviu Dudau <liviu@...au.co.uk>,
	Yijing Wang <wangyijing@...wei.com>
Subject: [PATCH v3 14/27] Irq_remapping/MSI: Use MSI chip framework to configure MSI/MSI-X irq

Use MSI chip framework instead of arch MSI functions to configure
MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 drivers/iommu/irq_remapping.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 33c4395..48d57e9 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -139,8 +139,8 @@ error:
 	return ret;
 }
 
-static int irq_remapping_setup_msi_irqs(struct pci_dev *dev,
-					int nvec, int type)
+static int irq_remapping_setup_msi_irqs(struct msi_chip *chip,
+		struct pci_dev *dev, int nvec, int type)
 {
 	if (type == PCI_CAP_ID_MSI)
 		return do_setup_msi_irqs(dev, nvec);
@@ -148,6 +148,11 @@ static int irq_remapping_setup_msi_irqs(struct pci_dev *dev,
 		return do_setup_msix_irqs(dev, nvec);
 }
 
+static struct msi_chip remap_msi_chip = {
+	.setup_irqs = irq_remapping_setup_msi_irqs,
+	.teardown_irq = native_teardown_msi_irq,
+};
+
 static void eoi_ioapic_pin_remapped(int apic, int pin, int vector)
 {
 	/*
@@ -165,9 +170,9 @@ static void __init irq_remapping_modify_x86_ops(void)
 	x86_io_apic_ops.set_affinity	= set_remapped_irq_affinity;
 	x86_io_apic_ops.setup_entry	= setup_ioapic_remapped_entry;
 	x86_io_apic_ops.eoi_ioapic_pin	= eoi_ioapic_pin_remapped;
-	x86_msi.setup_msi_irqs		= irq_remapping_setup_msi_irqs;
 	x86_msi.setup_hpet_msi		= setup_hpet_msi_remapped;
 	x86_msi.compose_msi_msg		= compose_remapped_msi_msg;
+	x86_msi_chip = &remap_msi_chip;
 }
 
 static __init int setup_nointremap(char *str)
-- 
1.7.1

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