diff options
Diffstat (limited to 'include/linux/irqdomain.h')
| -rw-r--r-- | include/linux/irqdomain.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index b0f9d16e48f6..f8563dcfd254 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -38,6 +38,8 @@ struct device_node; struct irq_domain; struct of_device_id; +struct irq_chip; +struct irq_data; /* Number of irqs reserved for a legacy isa controller */ #define NUM_ISA_INTERRUPTS 16 @@ -64,6 +66,16 @@ struct irq_domain_ops { int (*xlate)(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type); + +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + /* extended V2 interfaces to support hierarchy irq_domains */ + int (*alloc)(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs, void *arg); + void (*free)(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs); + void (*activate)(struct irq_domain *d, struct irq_data *irq_data); + void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data); +#endif }; extern struct irq_domain_ops irq_generic_chip_ops; @@ -77,6 +89,7 @@ struct irq_domain_chip_generic; * @ops: pointer to irq_domain methods * @host_data: private data pointer for use by owner. Not touched by irq_domain * core code. + * @flags: host per irq_domain flags * * Optional elements * @of_node: Pointer to device tree nodes associated with the irq_domain. Used @@ -84,6 +97,7 @@ struct irq_domain_chip_generic; * @gc: Pointer to a list of generic chips. There is a helper function for * setting up one or more generic chips for interrupt controllers * drivers using the generic chip library which uses this pointer. + * @parent: Pointer to parent irq_domain to support hierarchy irq_domains * * Revmap data, used internally by irq_domain * @revmap_direct_max_irq: The largest hwirq that can be set for controllers that @@ -97,10 +111,14 @@ struct irq_domain { const char *name; const struct irq_domain_ops *ops; void *host_data; + unsigned int flags; /* Optional data */ struct device_node *of_node; struct irq_domain_chip_generic *gc; +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + struct irq_domain *parent; +#endif /* reverse map data. The linear map gets appended to the irq_domain */ irq_hw_number_t hwirq_max; @@ -110,6 +128,19 @@ struct irq_domain { unsigned int linear_revmap[]; }; +/* Irq domain flags */ +enum { + /* Irq domain is hierarchical */ + IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), + + /* + * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved + * for implementation specific purposes and ignored by the + * core code. + */ + IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), +}; + #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, @@ -220,8 +251,75 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, const u32 *intspec, unsigned int intsize, irq_hw_number_t *out_hwirq, unsigned int *out_type); +/* V2 interfaces to support hierarchy IRQ domains. */ +extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, + unsigned int virq); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, + unsigned int nr_irqs, int node, void *arg, + bool realloc); +extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); +extern void irq_domain_activate_irq(struct irq_data *irq_data); +extern void irq_domain_deactivate_irq(struct irq_data *irq_data); + +static inline int irq_domain_alloc_irqs(struct irq_domain *domain, + unsigned int nr_irqs, int node, void *arg) +{ + return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false); +} + +extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, + unsigned int virq, + irq_hw_number_t hwirq, + struct irq_chip *chip, + void *chip_data); +extern void irq_domain_reset_irq_data(struct irq_data *irq_data); +extern void irq_domain_free_irqs_common(struct irq_domain *domain, + unsigned int virq, + unsigned int nr_irqs); +extern void irq_domain_free_irqs_top(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs); + +static inline int irq_domain_alloc_irqs_parent(struct irq_domain *domain, + unsigned int irq_base, + unsigned int nr_irqs, void *arg) +{ + if (domain->parent && domain->parent->ops->alloc) + return domain->parent->ops->alloc(domain->parent, irq_base, + nr_irqs, arg); + return -ENOSYS; +} + +static inline void irq_domain_free_irqs_parent(struct irq_domain *domain, + unsigned int irq_base, unsigned int nr_irqs) +{ + if (domain->parent && domain->parent->ops->free) + domain->parent->ops->free(domain->parent, irq_base, nr_irqs); +} + +static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; +} +#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ +static inline void irq_domain_activate_irq(struct irq_data *data) { } +static inline void irq_domain_deactivate_irq(struct irq_data *data) { } +static inline int irq_domain_alloc_irqs(struct irq_domain *domain, + unsigned int nr_irqs, int node, void *arg) +{ + return -1; +} + +static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) +{ + return false; +} +#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ + #else /* CONFIG_IRQ_DOMAIN */ static inline void irq_dispose_mapping(unsigned int virq) { } +static inline void irq_domain_activate_irq(struct irq_data *data) { } +static inline void irq_domain_deactivate_irq(struct irq_data *data) { } #endif /* !CONFIG_IRQ_DOMAIN */ #endif /* _LINUX_IRQDOMAIN_H */ |