diff options
Diffstat (limited to 'include/linux/irq.h')
| -rw-r--r-- | include/linux/irq.h | 124 |
1 files changed, 109 insertions, 15 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index f899b502f186..b7cbeed972e4 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -17,9 +17,12 @@ #include <linux/cache.h> #include <linux/spinlock.h> #include <linux/cpumask.h> +#include <linux/gfp.h> #include <linux/irqreturn.h> #include <linux/irqnr.h> #include <linux/errno.h> +#include <linux/topology.h> +#include <linux/wait.h> #include <asm/irq.h> #include <asm/ptrace.h> @@ -65,6 +68,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ +#define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ #ifdef CONFIG_IRQ_PER_CPU # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) @@ -155,17 +159,17 @@ struct irq_2_iommu; * @affinity: IRQ affinity on SMP * @cpu: cpu index useful for balancing * @pending_mask: pending rebalanced interrupts + * @threads_active: number of irqaction threads currently running + * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers * @dir: /proc/irq/ procfs entry * @name: flow handler name for /proc/interrupts output */ struct irq_desc { unsigned int irq; -#ifdef CONFIG_SPARSE_IRQ struct timer_rand_state *timer_rand_state; unsigned int *kstat_irqs; -# ifdef CONFIG_INTR_REMAP +#ifdef CONFIG_INTR_REMAP struct irq_2_iommu *irq_2_iommu; -# endif #endif irq_flow_handler_t handle_irq; struct irq_chip *chip; @@ -182,12 +186,14 @@ struct irq_desc { unsigned int irqs_unhandled; spinlock_t lock; #ifdef CONFIG_SMP - cpumask_t affinity; + cpumask_var_t affinity; unsigned int cpu; -#endif #ifdef CONFIG_GENERIC_PENDING_IRQ - cpumask_t pending_mask; + cpumask_var_t pending_mask; +#endif #endif + atomic_t threads_active; + wait_queue_head_t wait_for_threads; #ifdef CONFIG_PROC_FS struct proc_dir_entry *dir; #endif @@ -202,12 +208,6 @@ extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc extern struct irq_desc irq_desc[NR_IRQS]; #else /* CONFIG_SPARSE_IRQ */ extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int cpu); - -#define kstat_irqs_this_cpu(DESC) \ - ((DESC)->kstat_irqs[smp_processor_id()]) -#define kstat_incr_irqs_this_cpu(irqno, DESC) \ - ((DESC)->kstat_irqs[smp_processor_id()]++) - #endif /* CONFIG_SPARSE_IRQ */ extern struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu); @@ -226,7 +226,6 @@ irq_remap_to_desc(unsigned int irq, struct irq_desc *desc) * Migration helpers for obsolete names, they will go away: */ #define hw_interrupt_type irq_chip -typedef struct irq_chip hw_irq_controller; #define no_irq_type no_irq_chip typedef struct irq_desc irq_desc_t; @@ -236,6 +235,7 @@ typedef struct irq_desc irq_desc_t; #include <asm/hw_irq.h> extern int setup_irq(unsigned int irq, struct irqaction *new); +extern void remove_irq(unsigned int irq, struct irqaction *act); #ifdef CONFIG_GENERIC_HARDIRQS @@ -280,7 +280,7 @@ static inline int irq_balancing_disabled(unsigned int irq) } /* Handle irq action chains: */ -extern int handle_IRQ_event(unsigned int irq, struct irqaction *action); +extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action); /* * Built-in IRQ handlers for various IRQ types, @@ -325,7 +325,7 @@ static inline void generic_handle_irq(unsigned int irq) /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, struct irq_desc *desc, - int action_ret); + irqreturn_t action_ret); /* Resending of interrupts :*/ void check_irq_resend(struct irq_desc *desc, unsigned int irq); @@ -422,4 +422,98 @@ extern int set_irq_msi(unsigned int irq, struct msi_desc *entry); #endif /* !CONFIG_S390 */ +#ifdef CONFIG_SMP +/** + * init_alloc_desc_masks - allocate cpumasks for irq_desc + * @desc: pointer to irq_desc struct + * @cpu: cpu which will be handling the cpumasks + * @boot: true if need bootmem + * + * Allocates affinity and pending_mask cpumask if required. + * Returns true if successful (or not required). + * Side effect: affinity has all bits set, pending_mask has all bits clear. + */ +static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu, + bool boot) +{ + int node; + + if (boot) { + alloc_bootmem_cpumask_var(&desc->affinity); + cpumask_setall(desc->affinity); + +#ifdef CONFIG_GENERIC_PENDING_IRQ + alloc_bootmem_cpumask_var(&desc->pending_mask); + cpumask_clear(desc->pending_mask); +#endif + return true; + } + + node = cpu_to_node(cpu); + + if (!alloc_cpumask_var_node(&desc->affinity, GFP_ATOMIC, node)) + return false; + cpumask_setall(desc->affinity); + +#ifdef CONFIG_GENERIC_PENDING_IRQ + if (!alloc_cpumask_var_node(&desc->pending_mask, GFP_ATOMIC, node)) { + free_cpumask_var(desc->affinity); + return false; + } + cpumask_clear(desc->pending_mask); +#endif + return true; +} + +/** + * init_copy_desc_masks - copy cpumasks for irq_desc + * @old_desc: pointer to old irq_desc struct + * @new_desc: pointer to new irq_desc struct + * + * Insures affinity and pending_masks are copied to new irq_desc. + * If !CONFIG_CPUMASKS_OFFSTACK the cpumasks are embedded in the + * irq_desc struct so the copy is redundant. + */ + +static inline void init_copy_desc_masks(struct irq_desc *old_desc, + struct irq_desc *new_desc) +{ +#ifdef CONFIG_CPUMASKS_OFFSTACK + cpumask_copy(new_desc->affinity, old_desc->affinity); + +#ifdef CONFIG_GENERIC_PENDING_IRQ + cpumask_copy(new_desc->pending_mask, old_desc->pending_mask); +#endif +#endif +} + +static inline void free_desc_masks(struct irq_desc *old_desc, + struct irq_desc *new_desc) +{ + free_cpumask_var(old_desc->affinity); + +#ifdef CONFIG_GENERIC_PENDING_IRQ + free_cpumask_var(old_desc->pending_mask); +#endif +} + +#else /* !CONFIG_SMP */ + +static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu, + bool boot) +{ + return true; +} + +static inline void init_copy_desc_masks(struct irq_desc *old_desc, + struct irq_desc *new_desc) +{ +} + +static inline void free_desc_masks(struct irq_desc *old_desc, + struct irq_desc *new_desc) +{ +} +#endif /* CONFIG_SMP */ + #endif /* _LINUX_IRQ_H */ |