linux-kernel - [PATCH 03/16] x86/xen/MSI: Use MSI controller framework to configure MSI/MSI-X irq

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Message-ID: <1414416142-31239-4-git-send-email-wangyijing@huawei.com>
Date:	Mon, 27 Oct 2014 21:22:09 +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>, <x86@...nel.org>,
	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>,
	Yijing Wang <wangyijing@...wei.com>
Subject: [PATCH 03/16] x86/xen/MSI: Use MSI controller framework to configure MSI/MSI-X irq

Use MSI controller 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>
CC: David Vrabel <david.vrabel@...rix.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 arch/x86/pci/xen.c |   45 +++++++++++++++++++++++++++------------------
 1 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 466b978..83d8d50 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -157,7 +157,8 @@ static int acpi_register_gsi_xen(struct device *dev, u32 gsi,
 struct xen_pci_frontend_ops *xen_pci_frontend;
 EXPORT_SYMBOL_GPL(xen_pci_frontend);
 
-static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+static int xen_setup_msi_irqs(struct msi_controller *ctrl,
+		struct pci_dev *dev, int nvec, int type)
 {
 	int irq, ret, i;
 	struct msi_desc *msidesc;
@@ -219,7 +220,8 @@ static void xen_msi_compose_msg(struct pci_dev *pdev, unsigned int pirq,
 	msg->data = XEN_PIRQ_MSI_DATA;
 }
 
-static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+static int xen_hvm_setup_msi_irqs(struct msi_controller *ctrl,
+		struct pci_dev *dev, int nvec, int type)
 {
 	int irq, pirq;
 	struct msi_desc *msidesc;
@@ -267,7 +269,8 @@ error:
 #ifdef CONFIG_XEN_DOM0
 static bool __read_mostly pci_seg_supported = true;
 
-static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+static int xen_initdom_setup_msi_irqs(struct msi_controller *ctrl,
+		struct pci_dev *dev, int nvec, int type)
 {
 	int ret = 0;
 	struct msi_desc *msidesc;
@@ -349,7 +352,8 @@ out:
 	return ret;
 }
 
-static void xen_initdom_restore_msi_irqs(struct pci_dev *dev)
+static void xen_initdom_restore_msi_irqs(struct msi_controller *ctrl,
+		struct pci_dev *dev)
 {
 	int ret = 0;
 
@@ -376,7 +380,13 @@ static void xen_initdom_restore_msi_irqs(struct pci_dev *dev)
 }
 #endif
 
-static void xen_teardown_msi_irqs(struct pci_dev *dev)
+static void xen_teardown_msi_irq(struct msi_controller *ctrl, unsigned int irq)
+{
+	xen_destroy_irq(irq);
+}
+
+static void xen_teardown_msi_irqs(struct msi_controller *ctrl,
+		struct pci_dev *dev)
 {
 	struct msi_desc *msidesc;
 
@@ -390,11 +400,7 @@ static void xen_teardown_msi_irqs(struct pci_dev *dev)
 	default_teardown_msi_irqs(dev);
 }
 
-static void xen_teardown_msi_irq(unsigned int irq)
-{
-	xen_destroy_irq(irq);
-}
-
+struct msi_controller xen_msi_ctrl;
 #endif
 
 int __init pci_xen_init(void)
@@ -415,9 +421,10 @@ int __init pci_xen_init(void)
 #endif
 
 #ifdef CONFIG_PCI_MSI
-	x86_msi.setup_msi_irqs = xen_setup_msi_irqs;
-	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
-	x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs;
+	xen_msi_ctrl.setup_irqs = xen_setup_msi_irqs;
+	xen_msi_ctrl.teardown_irq = xen_teardown_msi_irq;
+	xen_msi_ctrl.teardown_irqs = xen_teardown_msi_irqs;
+	x86_msi_ctrl = &xen_msi_ctrl;
 	pci_msi_ignore_mask = 1;
 #endif
 	return 0;
@@ -437,8 +444,9 @@ int __init pci_xen_hvm_init(void)
 #endif
 
 #ifdef CONFIG_PCI_MSI
-	x86_msi.setup_msi_irqs = xen_hvm_setup_msi_irqs;
-	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
+	xen_msi_ctrl.setup_irqs = xen_hvm_setup_msi_irqs;
+	xen_msi_ctrl.teardown_irq = xen_teardown_msi_irq;
+	x86_msi_ctrl = &xen_msi_ctrl;
 #endif
 	return 0;
 }
@@ -495,9 +503,10 @@ int __init pci_xen_initial_domain(void)
 	int irq;
 
 #ifdef CONFIG_PCI_MSI
-	x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs;
-	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
-	x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
+	xen_msi_ctrl.setup_irqs = xen_initdom_setup_msi_irqs;
+	xen_msi_ctrl.teardown_irq = xen_teardown_msi_irq;
+	xen_msi_ctrl.restore_irqs = xen_initdom_restore_msi_irqs;
+	x86_msi_ctrl = &xen_msi_ctrl;
 	pci_msi_ignore_mask = 1;
 #endif
 	xen_setup_acpi_sci();
-- 
1.7.1

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