irqchip/loongarch: Fix some issues of irq controllers

LoongArch inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ONTH

--------------------------------

In dual-bridges scenario, some bugs were found for irq
controllers drivers, so the patch is used to fix them.
Signed-off-by: NJianmin Lv <lvjianmin@loongson.cn>
Change-Id: Ib498432738a269543626f4e8cc5dc24aa12c4c47
(cherry picked from commit d6b1585a)

arch/loongarch/kernel/irq.c

@@ -106,6 +106,13 @@ void __init init_IRQ(void)
 	unsigned int order = get_order(IRQ_STACK_SIZE);
 	struct page *page;
 
+	u64 node;
+	if (!acpi_gbl_reduced_hardware)
+		for_each_node(node)
+			writel(0x40000000 | (node << 12),
+				(volatile void __iomem *)(((node << 44)
+				| 0x80000EFDFB000000ULL) + 0x274));
+
 	clear_csr_ecfg(ECFG0_IM);
 	clear_csr_estat(ESTATF_IP);
 

drivers/irqchip/irq-loongson-eiointc.c

@@ -294,9 +294,6 @@ static void acpi_set_vec_parent(int node, struct irq_domain *parent, struct acpi
 {
 	int i;
 
-	if (cpu_has_flatmode)
-		node = cpu_to_node(node * CORES_PER_EIO_NODE);
-
 	for (i = 0; i < MAX_IO_PICS; i++) {
 		if (node == vec_group[i].node) {
 			vec_group[i].parent = parent;
@@ -365,8 +362,13 @@ int __init
 pch_msi_parse_madt(union acpi_subtable_headers *header,
 		       const unsigned long end)
 {
+	struct irq_domain *parent;
 	struct acpi_madt_msi_pic *pchmsi_entry = (struct acpi_madt_msi_pic *)header;
-	struct irq_domain *parent = acpi_get_vec_parent(eiointc_priv[nr_pics - 1]->node, msi_group);
+	int node = eiointc_priv[nr_pics - 1]->node;
+
+	if (cpu_has_flatmode)
+		node = cpu_to_node(node * CORES_PER_EIO_NODE);
+	parent = acpi_get_vec_parent(node, msi_group);
 
 	if (parent)
 		return pch_msi_acpi_init(parent, pchmsi_entry);
@@ -389,6 +391,7 @@ int __init eiointc_acpi_init(struct irq_domain *parent,
 	int i, parent_irq;
 	unsigned long node_map;
 	struct eiointc_priv *priv;
+	int node = acpi_eiointc->node;
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -431,8 +434,10 @@ int __init eiointc_acpi_init(struct irq_domain *parent,
 				  "irqchip/loongarch/intc:starting",
 				  eiointc_router_init, NULL);
 
-	acpi_set_vec_parent(acpi_eiointc->node, priv->eiointc_domain, pch_group);
-	acpi_set_vec_parent(acpi_eiointc->node, priv->eiointc_domain, msi_group);
+	if (cpu_has_flatmode)
+		node = cpu_to_node(node * CORES_PER_EIO_NODE);
+	acpi_set_vec_parent(node, priv->eiointc_domain, pch_group);
+	acpi_set_vec_parent(node, priv->eiointc_domain, msi_group);
 	acpi_cascade_irqdomain_init();
 
 	return 0;

drivers/irqchip/irq-loongson-pch-pic.c

@@ -394,6 +394,9 @@ int __init pch_pic_acpi_init(struct irq_domain *parent,
 	int ret, vec_base;
 	struct fwnode_handle *domain_handle;
 
+	if (find_pch_pic(acpi_pchpic->gsi_base) >= 0)
+		return 0;
+
 	vec_base = acpi_pchpic->gsi_base - GSI_MIN_PCH_IRQ;
 
 	domain_handle = irq_domain_alloc_fwnode(&acpi_pchpic->address);