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Message-ID: <1413342435-7876-14-git-send-email-wangyijing@huawei.com>
Date: Wed, 15 Oct 2014 11:07:01 +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 13/27] x86/xen/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>
Acked-by: David Vrabel <david.vrabel@...rix.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
arch/x86/pci/xen.c | 58 +++++++++++++++++++++++++++++++++++-----------------
1 files changed, 39 insertions(+), 19 deletions(-)
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index e5b8b78..75067ca 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_chip *chip,
+ 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_chip *chip,
+ 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_chip *chip,
+ 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_chip *chip,
+ 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_chip *chip, unsigned int irq)
+{
+ xen_destroy_irq(irq);
+}
+
+static void xen_teardown_msi_irqs(struct msi_chip *chip,
+ struct pci_dev *dev)
{
struct msi_desc *msidesc;
@@ -386,14 +396,22 @@ static void xen_teardown_msi_irqs(struct pci_dev *dev)
else
xen_pci_frontend_disable_msi(dev);
- /* Free the IRQ's and the msidesc using the generic code. */
- default_teardown_msi_irqs(dev);
-}
+ list_for_each_entry(msidesc, &dev->msi_list, list) {
+ int i, nvec;
+ if (msidesc->irq == 0)
+ continue;
+ if (msidesc->nvec_used)
+ nvec = msidesc->nvec_used;
+ else
+ nvec = 1 << msidesc->msi_attrib.multiple;
+ for (i = 0; i < nvec; i++)
+ xen_teardown_msi_irq(chip, msidesc->irq + i);
+ }
-static void xen_teardown_msi_irq(unsigned int irq)
-{
- xen_destroy_irq(irq);
}
+
+struct msi_chip xen_msi_chip;
+
#endif
int __init pci_xen_init(void)
@@ -414,9 +432,9 @@ 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_chip.setup_irqs = xen_setup_msi_irqs;
+ xen_msi_chip.teardown_irqs = xen_teardown_msi_irqs;
+ x86_msi_chip = &xen_msi_chip;
pci_msi_ignore_mask = 1;
#endif
return 0;
@@ -436,8 +454,9 @@ 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_chip.setup_irqs = xen_hvm_setup_msi_irqs;
+ xen_msi_chip.teardown_irq = xen_teardown_msi_irq;
+ x86_msi_chip = &xen_msi_chip;
#endif
return 0;
}
@@ -494,9 +513,10 @@ 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_chip.setup_irqs = xen_initdom_setup_msi_irqs;
+ xen_msi_chip.teardown_irq = xen_teardown_msi_irq;
+ xen_msi_chip.restore_irqs = xen_initdom_restore_msi_irqs;
+ x86_msi_chip = &xen_msi_chip;
pci_msi_ignore_mask = 1;
#endif
xen_setup_acpi_sci();
--
1.7.1
--
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