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authorThierry Reding <thierry.reding@avionic-design.de>2013-08-10 00:27:08 +0400
committerJason Cooper <jason@lakedaemon.net>2013-08-12 19:26:58 +0400
commit0cbdcfcf427b63b9670e56760ef5e67cd7081b35 (patch)
tree941122e2248ac4b8dd107bc1702c83cbc0961166 /include/linux/msi.h
parentebd97be635bff43239f391a49c78b98818c589fe (diff)
downloadlinux-0cbdcfcf427b63b9670e56760ef5e67cd7081b35.tar.xz
PCI: Introduce new MSI chip infrastructure
The new struct msi_chip is used to associated an MSI controller with a PCI bus. It is automatically handed down from the root to its children during bus enumeration. This patch provides default (weak) implementations for the architecture- specific MSI functions (arch_setup_msi_irq(), arch_teardown_msi_irq() and arch_msi_check_device()) which check if a PCI device's bus has an attached MSI chip and forward the call appropriately. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Daniel Price <daniel.price@gmail.com> Tested-by: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'include/linux/msi.h')
-rw-r--r--include/linux/msi.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 271dfd14a05f..090ddadbc838 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -65,4 +65,15 @@ void arch_restore_msi_irqs(struct pci_dev *dev, int irq);
void default_teardown_msi_irqs(struct pci_dev *dev);
void default_restore_msi_irqs(struct pci_dev *dev, int irq);
+struct msi_chip {
+ struct module *owner;
+ struct device *dev;
+
+ int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev,
+ struct msi_desc *desc);
+ void (*teardown_irq)(struct msi_chip *chip, unsigned int irq);
+ int (*check_device)(struct msi_chip *chip, struct pci_dev *dev,
+ int nvec, int type);
+};
+
#endif /* LINUX_MSI_H */