PCI/MSI: Add helper function pci_msi_domain_get_msi_rid().
Add pci_msi_domain_get_msi_rid() to return the MSI requester id (RID).
Initially needed by gic-v3 based systems. It will be used by follow on
patch to drivers/irqchip/irq-gic-v3-its-pci-msi.c
Initially supports mapping the RID via OF device tree. In the future,
this could be extended to use ACPI _IORT tables as well.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 32a24b9..8772375 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -294,6 +294,7 @@
struct msi_desc *desc);
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);
#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
#endif /* LINUX_MSI_H */