From 020c312658d61297ffe43b412441c69b1c36fb1b Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Sat, 15 Nov 2014 10:49:12 +0000 Subject: PCI/MSI: Allow an msi_controller to be associated to an irq domain With the new stacked irq domains, it becomes pretty tempting to allocate an MSI domain per PCI bus, which would remove the requirement of either relying on arch-specific code, or a default PCI MSI domain. By allowing the msi_controller structure to carry a pointer to an irq_domain, we can easily use this in pci_msi_setup_msi_irqs. The existing code can still be used as a fallback if the MSI driver does not populate the domain field. Tested on arm64 with the GICv3 ITS driver. Signed-off-by: Marc Zyngier Cc: Yingjoe Chen Cc: Bjorn Helgaas Cc: linux-arm-kernel@lists.infradead.org Cc: Jiang Liu Link: http://lkml.kernel.org/r/1416048553-29289-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/msi.h b/include/linux/msi.h index 692f217..8ac4a68 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -108,6 +108,9 @@ struct msi_controller { struct device *dev; struct device_node *of_node; struct list_head list; +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN + struct irq_domain *domain; +#endif int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev, struct msi_desc *desc); -- cgit v1.1