linux-kernel - [RFC PATCH 09/20] irq_remapping/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

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Message-ID: <1407828373-24322-10-git-send-email-wangyijing@huawei.com>
Date:	Tue, 12 Aug 2014 15:26:02 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	<linux-kernel@...r.kernel.org>, Xinwei Hu <huxinwei@...wei.com>,
	Wuyun <wuyun.wu@...wei.com>, <linux-pci@...r.kernel.org>,
	Marc Zyngier <marc.zyngier@....com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	<arnab.basu@...escale.com>, <x86@...nel.org>,
	"Arnd Bergmann" <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	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>,
	Yijing Wang <wangyijing@...wei.com>
Subject: [RFC PATCH 09/20] irq_remapping/MSI: Use msi_chip instead of arch func to configure MSI/MSI-X

Introduce a new struct msi_chip remap_msi_chip instead of weak arch
functions to configure irq remapping MSI/MSI-X in x86.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 drivers/iommu/irq_remapping.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 33c4395..f494b51 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -139,15 +139,20 @@ error:
 	return ret;
 }
 
-static int irq_remapping_setup_msi_irqs(struct pci_dev *dev,
+static int irq_remapping_setup_msi_irqs(struct device *dev,
 					int nvec, int type)
 {
 	if (type == PCI_CAP_ID_MSI)
-		return do_setup_msi_irqs(dev, nvec);
+		return do_setup_msi_irqs(to_pci_dev(dev), nvec);
 	else
-		return do_setup_msix_irqs(dev, nvec);
+		return do_setup_msix_irqs(to_pci_dev(dev), nvec);
 }
 
+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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