diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irqdesc.h | 18 | ||||
| -rw-r--r-- | include/linux/irqdomain.h | 65 |
2 files changed, 44 insertions, 39 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index df4651250785..59aea39785bf 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -158,25 +158,21 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc) desc->handle_irq(desc); } +int handle_irq_desc(struct irq_desc *desc); int generic_handle_irq(unsigned int irq); -#ifdef CONFIG_HANDLE_DOMAIN_IRQ +#ifdef CONFIG_IRQ_DOMAIN /* * Convert a HW interrupt number to a logical one using a IRQ domain, * and handle the result interrupt number. Return -EINVAL if - * conversion failed. Providing a NULL domain indicates that the - * conversion has already been done. + * conversion failed. */ -int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, - bool lookup, struct pt_regs *regs); +int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwirq); -static inline int handle_domain_irq(struct irq_domain *domain, - unsigned int hwirq, struct pt_regs *regs) -{ - return __handle_domain_irq(domain, hwirq, true, regs); -} +#ifdef CONFIG_HANDLE_DOMAIN_IRQ +int handle_domain_irq(struct irq_domain *domain, + unsigned int hwirq, struct pt_regs *regs); -#ifdef CONFIG_IRQ_DOMAIN int handle_domain_nmi(struct irq_domain *domain, unsigned int hwirq, struct pt_regs *regs); #endif diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 62a8e3d23829..23e4ee523576 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -41,13 +41,11 @@ struct fwnode_handle; struct irq_domain; struct irq_chip; struct irq_data; +struct irq_desc; struct cpumask; struct seq_file; struct irq_affinity_desc; -/* Number of irqs reserved for a legacy isa controller */ -#define NUM_ISA_INTERRUPTS 16 - #define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16 /** @@ -152,11 +150,10 @@ struct irq_domain_chip_generic; * @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 - * support direct mapping - * @revmap_size: Size of the linear map table @linear_revmap[] + * @revmap_size: Size of the linear map table @revmap[] * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map - * @linear_revmap: Linear table of hwirq->virq reverse mappings + * @revmap_mutex: Lock for the revmap + * @revmap: Linear table of irq_data pointers */ struct irq_domain { struct list_head link; @@ -176,11 +173,10 @@ struct irq_domain { /* reverse map data. The linear map gets appended to the irq_domain */ irq_hw_number_t hwirq_max; - unsigned int revmap_direct_max_irq; unsigned int revmap_size; struct radix_tree_root revmap_tree; - struct mutex revmap_tree_mutex; - unsigned int linear_revmap[]; + struct mutex revmap_mutex; + struct irq_data __rcu *revmap[]; }; /* Irq domain flags */ @@ -210,6 +206,9 @@ enum { */ IRQ_DOMAIN_MSI_NOMASK_QUIRK = (1 << 6), + /* Irq domain doesn't translate anything */ + IRQ_DOMAIN_FLAG_NO_MAP = (1 << 7), + /* * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved * for implementation specific purposes and ignored by the @@ -348,6 +347,8 @@ static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_no { return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); } + +#ifdef CONFIG_IRQ_DOMAIN_NOMAP static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, unsigned int max_irq, const struct irq_domain_ops *ops, @@ -355,14 +356,10 @@ static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_nod { return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data); } -static inline struct irq_domain *irq_domain_add_legacy_isa( - struct device_node *of_node, - const struct irq_domain_ops *ops, - void *host_data) -{ - return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops, - host_data); -} + +extern unsigned int irq_create_direct_mapping(struct irq_domain *host); +#endif + static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, const struct irq_domain_ops *ops, void *host_data) @@ -405,25 +402,37 @@ static inline unsigned int irq_create_mapping(struct irq_domain *host, return irq_create_mapping_affinity(host, hwirq, NULL); } +extern struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq, + unsigned int *irq); + +static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + return __irq_resolve_mapping(domain, hwirq, NULL); +} /** - * irq_linear_revmap() - Find a linux irq from a hw irq number. + * irq_find_mapping() - Find a linux irq from a hw irq number. * @domain: domain owning this hardware interrupt * @hwirq: hardware irq number in that domain space - * - * This is a fast path alternative to irq_find_mapping() that can be - * called directly by irq controller code to save a handful of - * instructions. It is always safe to call, but won't find irqs mapped - * using the radix tree. */ +static inline unsigned int irq_find_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + unsigned int irq; + + if (__irq_resolve_mapping(domain, hwirq, &irq)) + return irq; + + return 0; +} + static inline unsigned int irq_linear_revmap(struct irq_domain *domain, irq_hw_number_t hwirq) { - return hwirq < domain->revmap_size ? domain->linear_revmap[hwirq] : 0; + return irq_find_mapping(domain, hwirq); } -extern unsigned int irq_find_mapping(struct irq_domain *host, - irq_hw_number_t hwirq); -extern unsigned int irq_create_direct_mapping(struct irq_domain *host); extern const struct irq_domain_ops irq_domain_simple_ops; |