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| author |   Thierry Reding <thierry.reding@avionic-design.de> | 2013-08-09 22:27:08 +0200 |
|---|---|---|
| committer |   Jason Cooper <jason@lakedaemon.net> | 2013-08-12 15:26:58 +0000 |
| commit | 0cbdcfcf427b63b9670e56760ef5e67cd7081b35 (patch) | |
| tree | 941122e2248ac4b8dd107bc1702c83cbc0961166 /include/linux/msi.h | |
| parent | PCI: remove ARCH_SUPPORTS_MSI kconfig option (diff) | |
| download | linux-dev-0cbdcfcf427b63b9670e56760ef5e67cd7081b35.tar.xz linux-dev-0cbdcfcf427b63b9670e56760ef5e67cd7081b35.zip | |
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.h | 11 |
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 */ |