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genirq/msi: Export functions to allow MSI domains in modules

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The Linux kernel already has the concept of IRQ domain, wherein a
component can expose a set of IRQs which are managed by a particular
interrupt controller chip or other subsystem. The PCI driver exposes
the notion of an IRQ domain for Message-Signaled Interrupts (MSI) from
PCI Express devices. This patch exposes the functions which are
necessary for creating a MSI IRQ domain within a module.

[ tglx: Split it into x86 and core irq parts ]

Signed-off-by: Jake Oshins <jakeo@microsoft.com>
Cc: gregkh@linuxfoundation.org
Cc: kys@microsoft.com
Cc: devel@linuxdriverproject.org
Cc: olaf@aepfle.de
Cc: apw@canonical.com
Cc: vkuznets@redhat.com
Cc: haiyangz@microsoft.com
Cc: marc.zyngier@arm.com
Cc: bhelgaas@google.com
Link: http://lkml.kernel.org/r/1449769983-12948-4-git-send-email-jakeo@microsoft.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jake Oshins
2015-12-10 17:52:59 +00:00
committed by Thomas Gleixner
parent 4e8dbe9e93
commit a4289dc2ec
3 changed files with 9 additions and 0 deletions
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4
drivers/pci/msi.c
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@@ -257,6 +257,7 @@ void pci_msi_mask_irq(struct irq_data *data)
{
msi_set_mask_bit(data, 1);
}
EXPORT_SYMBOL_GPL(pci_msi_mask_irq);
/**
* pci_msi_unmask_irq - Generic irq chip callback to unmask PCI/MSI interrupts
@@ -266,6 +267,7 @@ void pci_msi_unmask_irq(struct irq_data *data)
{
msi_set_mask_bit(data, 0);
}
EXPORT_SYMBOL_GPL(pci_msi_unmask_irq);
void default_restore_msi_irqs(struct pci_dev *dev)
{
@@ -1126,6 +1128,7 @@ struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc)
{
return to_pci_dev(desc->dev);
}
EXPORT_SYMBOL(msi_desc_to_pci_dev);
void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
{
@@ -1285,6 +1288,7 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
domain->bus_token = DOMAIN_BUS_PCI_MSI;
return domain;
}
EXPORT_SYMBOL_GPL(pci_msi_create_irq_domain);
/**
* pci_msi_domain_alloc_irqs - Allocate interrupts for @dev in @domain