PCI/MSI: Allow the MSI domain to be device-specific
So far, we've always considered that for a given PCI device, its MSI controller was either set by the architecture-specific pcibios hook, or simply inherited from the host bridge. This doesn't cover things like firmware-defined topologies like msi-map (DT) or IORT (ACPI), which can provide information about which MSI controller to use on a per-device basis. This patch adds the necessary hook into the MSI code to allow this feature, and provides the msi-map functionnality as a first implementation. Acked-by: Rob Herring <robh@kernel.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
@@ -295,6 +295,12 @@ irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
|
||||
int pci_msi_domain_check_cap(struct irq_domain *domain,
|
||||
struct msi_domain_info *info, struct device *dev);
|
||||
u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev);
|
||||
struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev);
|
||||
#else
|
||||
static inline struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
|
||||
|
||||
#endif /* LINUX_MSI_H */
|
||||
|
Reference in New Issue
Block a user