iommu/vt-d: Refine the interfaces to create IRQ for DMAR unit

[mirror_ubuntu-bionic-kernel.git] / arch / ia64 / kernel / msi_ia64.c

diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c
index 9dd7464f8c1742848011ce1397ef8a79f1e60d4f..d70bf15c690a53227142b6027ce7bb116475ed9d 100644 (file)
--- a/arch/ia64/kernel/msi_ia64.c
+++ b/arch/ia64/kernel/msi_ia64.c
@@ -165,7 +165,7 @@ static struct irq_chip dmar_msi_type = {
        .irq_retrigger = ia64_msi_retrigger_irq,
 };
 
-static int
+static void
 msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
 {
        struct irq_cfg *cfg = irq_cfg + irq;
@@ -186,21 +186,29 @@ msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
                MSI_DATA_LEVEL_ASSERT |
                MSI_DATA_DELIVERY_FIXED |
                MSI_DATA_VECTOR(cfg->vector);
-       return 0;
 }
 
-int arch_setup_dmar_msi(unsigned int irq)
+int dmar_alloc_hwirq(int id, int node, void *arg)
 {
-       int ret;
+       int irq;
        struct msi_msg msg;
 
-       ret = msi_compose_msg(NULL, irq, &msg);
-       if (ret < 0)
-               return ret;
-       dmar_msi_write(irq, &msg);
-       irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq,
-                                     "edge");
-       return 0;
+       irq = create_irq();
+       if (irq > 0) {
+               irq_set_handler_data(irq, arg);
+               irq_set_chip_and_handler_name(irq, &dmar_msi_type,
+                                             handle_edge_irq, "edge");
+               msi_compose_msg(NULL, irq, &msg);
+               dmar_msi_write(irq, &msg);
+       }
+
+       return irq;
+}
+
+void dmar_free_hwirq(int irq)
+{
+       irq_set_handler_data(irq, NULL);
+       destroy_irq(irq);
 }
 #endif /* CONFIG_INTEL_IOMMU */