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Diffstat (limited to 'include/linux/irqdomain.h')
-rw-r--r--include/linux/irqdomain.h31
1 files changed, 29 insertions, 2 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 744ac0ec9..f644fdb06 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -45,6 +45,20 @@ struct irq_data;
/* Number of irqs reserved for a legacy isa controller */
#define NUM_ISA_INTERRUPTS 16
+/*
+ * Should several domains have the same device node, but serve
+ * different purposes (for example one domain is for PCI/MSI, and the
+ * other for wired IRQs), they can be distinguished using a
+ * bus-specific token. Most domains are expected to only carry
+ * DOMAIN_BUS_ANY.
+ */
+enum irq_domain_bus_token {
+ DOMAIN_BUS_ANY = 0,
+ DOMAIN_BUS_PCI_MSI,
+ DOMAIN_BUS_PLATFORM_MSI,
+ DOMAIN_BUS_NEXUS,
+};
+
/**
* struct irq_domain_ops - Methods for irq_domain objects
* @match: Match an interrupt controller device node to a host, returns
@@ -61,7 +75,8 @@ struct irq_data;
* to setup the irq_desc when returning from map().
*/
struct irq_domain_ops {
- int (*match)(struct irq_domain *d, struct device_node *node);
+ int (*match)(struct irq_domain *d, struct device_node *node,
+ enum irq_domain_bus_token bus_token);
int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw);
void (*unmap)(struct irq_domain *d, unsigned int virq);
int (*xlate)(struct irq_domain *d, struct device_node *node,
@@ -116,6 +131,7 @@ struct irq_domain {
/* Optional data */
struct device_node *of_node;
+ enum irq_domain_bus_token bus_token;
struct irq_domain_chip_generic *gc;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
struct irq_domain *parent;
@@ -145,6 +161,11 @@ enum {
IRQ_DOMAIN_FLAG_NONCORE = (1 << 16),
};
+static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d)
+{
+ return d->of_node;
+}
+
#ifdef CONFIG_IRQ_DOMAIN
struct irq_domain *__irq_domain_add(struct device_node *of_node, int size,
irq_hw_number_t hwirq_max, int direct_max,
@@ -161,9 +182,15 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
irq_hw_number_t first_hwirq,
const struct irq_domain_ops *ops,
void *host_data);
-extern struct irq_domain *irq_find_host(struct device_node *node);
+extern struct irq_domain *irq_find_matching_host(struct device_node *node,
+ enum irq_domain_bus_token bus_token);
extern void irq_set_default_host(struct irq_domain *host);
+static inline struct irq_domain *irq_find_host(struct device_node *node)
+{
+ return irq_find_matching_host(node, DOMAIN_BUS_ANY);
+}
+
/**
* irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
* @of_node: pointer to interrupt controller's device tree node.