PCI/MSI: Enhance core to support hierarchy irqdomain

Enhance PCI MSI core to support hierarchy irqdomain, so the common
code can be shared across architectures.

[ tglx: Extracted and combined from several patches ]

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/msi.h b/include/linux/msi.h
index 0098e2c8fd42..1628788aee25 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -220,4 +220,18 @@ struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
 
 #endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
 
+#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+void pci_msi_domain_write_msg(struct irq_data *irq_data, struct msi_msg *msg);
+struct irq_domain *pci_msi_create_irq_domain(struct device_node *node,
+                                             struct msi_domain_info *info,
+                                             struct irq_domain *parent);
+int pci_msi_domain_alloc_irqs(struct irq_domain *domain, struct pci_dev *dev,
+                              int nvec, int type);
+void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev);
+irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
+                                          struct msi_desc *desc);
+int pci_msi_domain_check_cap(struct irq_domain *domain,
+                             struct msi_domain_info *info, struct device *dev);
+#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
+
 #endif /* LINUX_MSI_H */