From 0cbdcfcf427b63b9670e56760ef5e67cd7081b35 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Fri, 9 Aug 2013 22:27:08 +0200 Subject: 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 Signed-off-by: Thomas Petazzoni Acked-by: Bjorn Helgaas Tested-by: Daniel Price Tested-by: Thierry Reding Signed-off-by: Jason Cooper --- include/linux/msi.h | 11 +++++++++++ include/linux/pci.h | 1 + 2 files changed, 12 insertions(+) (limited to 'include/linux') 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 */ diff --git a/include/linux/pci.h b/include/linux/pci.h index 0fd1f1582fa1..4044e3c00609 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -433,6 +433,7 @@ struct pci_bus { struct resource busn_res; /* bus numbers routed to this bus */ struct pci_ops *ops; /* configuration access functions */ + struct msi_chip *msi; /* MSI controller */ void *sysdata; /* hook for sys-specific extension */ struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ -- cgit v1.2.3