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Subject[tip:irq/core] genirq/msi: Export functions to allow MSI domains in modules
Commit-ID:  a4289dc2ec3a5821076a78ee9678909b4eff297e
Gitweb: http://git.kernel.org/tip/a4289dc2ec3a5821076a78ee9678909b4eff297e
Author: Jake Oshins <jakeo@microsoft.com>
AuthorDate: Thu, 10 Dec 2015 17:52:59 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Sun, 20 Dec 2015 12:26:52 +0100

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

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>
---
drivers/pci/msi.c | 4 ++++
kernel/irq/chip.c | 1 +
kernel/irq/irqdomain.c | 4 ++++
3 files changed, 9 insertions(+)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 7eaa4c8..7a0df3f 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -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
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 05e29de..5797909 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -950,6 +950,7 @@ void irq_chip_ack_parent(struct irq_data *data)
data = data->parent_data;
data->chip->irq_ack(data);
}
+EXPORT_SYMBOL_GPL(irq_chip_ack_parent);

/**
* irq_chip_mask_parent - Mask the parent interrupt
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 1c9973e..280a7fc 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -60,6 +60,7 @@ struct fwnode_handle *irq_domain_alloc_fwnode(void *data)
fwid->fwnode.type = FWNODE_IRQCHIP;
return &fwid->fwnode;
}
+EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode);

/**
* irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
@@ -77,6 +78,7 @@ void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
kfree(fwid->name);
kfree(fwid);
}
+EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);

/**
* __irq_domain_add() - Allocate a new irq_domain data structure
@@ -1013,6 +1015,7 @@ struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,

return NULL;
}
+EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);

/**
* irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
@@ -1343,6 +1346,7 @@ struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,

return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
}
+EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);

/**
* irq_domain_set_info - Set the complete data for a @virq in @domain

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