genirq: Distangle irq.h
Move irq_desc and internal functions out of irq.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
parent
fe21221386
commit
e144710b30
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@ -80,7 +80,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
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# define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING
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#endif
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struct proc_dir_entry;
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struct msi_desc;
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/**
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@ -202,152 +201,36 @@ struct irq_chip {
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#endif
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};
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struct timer_rand_state;
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struct irq_2_iommu;
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/**
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* struct irq_desc - interrupt descriptor
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* @irq_data: per irq and chip data passed down to chip functions
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* @timer_rand_state: pointer to timer rand state struct
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* @kstat_irqs: irq stats per cpu
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* @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
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* @action: the irq action chain
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* @status: status information
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* @depth: disable-depth, for nested irq_disable() calls
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* @wake_depth: enable depth, for multiple set_irq_wake() callers
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* @irq_count: stats field to detect stalled irqs
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* @last_unhandled: aging timer for unhandled count
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* @irqs_unhandled: stats field for spurious unhandled interrupts
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* @lock: locking for SMP
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* @pending_mask: pending rebalanced interrupts
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* @threads_active: number of irqaction threads currently running
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* @wait_for_threads: wait queue for sync_irq to wait for threaded handlers
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* @dir: /proc/irq/ procfs entry
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* @name: flow handler name for /proc/interrupts output
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*/
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struct irq_desc {
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#ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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struct irq_data irq_data;
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#else
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/*
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* This union will go away, once we fixed the direct access to
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* irq_desc all over the place. The direct fields are a 1:1
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* overlay of irq_data.
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*/
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union {
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struct irq_data irq_data;
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struct {
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unsigned int irq;
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unsigned int node;
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struct irq_chip *chip;
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void *handler_data;
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void *chip_data;
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struct msi_desc *msi_desc;
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#ifdef CONFIG_SMP
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cpumask_var_t affinity;
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#endif
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#ifdef CONFIG_INTR_REMAP
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struct irq_2_iommu *irq_2_iommu;
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#endif
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};
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};
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#endif
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struct timer_rand_state *timer_rand_state;
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unsigned int *kstat_irqs;
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irq_flow_handler_t handle_irq;
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struct irqaction *action; /* IRQ action list */
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unsigned int status; /* IRQ status */
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unsigned int depth; /* nested irq disables */
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unsigned int wake_depth; /* nested wake enables */
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unsigned int irq_count; /* For detecting broken IRQs */
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unsigned long last_unhandled; /* Aging timer for unhandled count */
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unsigned int irqs_unhandled;
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raw_spinlock_t lock;
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#ifdef CONFIG_SMP
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const struct cpumask *affinity_hint;
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_var_t pending_mask;
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#endif
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#endif
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atomic_t threads_active;
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wait_queue_head_t wait_for_threads;
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *dir;
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#endif
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const char *name;
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} ____cacheline_internodealigned_in_smp;
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extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
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struct irq_desc *desc, int node);
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extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
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#ifndef CONFIG_SPARSE_IRQ
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extern struct irq_desc irq_desc[NR_IRQS];
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#endif
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#ifdef CONFIG_NUMA_IRQ_DESC
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extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
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#else
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static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
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{
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return desc;
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}
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#endif
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extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
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/* This include will go away once we isolated irq_desc usage to core code */
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#include <linux/irqdesc.h>
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/*
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* Pick up the arch-dependent methods:
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*/
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#include <asm/hw_irq.h>
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struct irqaction;
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extern int setup_irq(unsigned int irq, struct irqaction *new);
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extern void remove_irq(unsigned int irq, struct irqaction *act);
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#ifdef CONFIG_GENERIC_HARDIRQS
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#ifdef CONFIG_SMP
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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# ifdef CONFIG_GENERIC_PENDING_IRQ
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void move_native_irq(int irq);
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void move_masked_irq(int irq);
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#else /* CONFIG_GENERIC_PENDING_IRQ */
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static inline void move_irq(int irq)
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{
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}
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static inline void move_native_irq(int irq)
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{
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}
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static inline void move_masked_irq(int irq)
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{
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}
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#endif /* CONFIG_GENERIC_PENDING_IRQ */
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#else /* CONFIG_SMP */
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#define move_native_irq(x)
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#define move_masked_irq(x)
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#endif /* CONFIG_SMP */
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# else
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static inline void move_irq(int irq) { }
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static inline void move_native_irq(int irq) { }
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static inline void move_masked_irq(int irq) { }
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# endif
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#else
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static inline void move_native_irq(int irq) { }
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static inline void move_masked_irq(int irq) { }
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#endif
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extern int no_irq_affinity;
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static inline int irq_balancing_disabled(unsigned int irq)
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{
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struct irq_desc *desc;
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desc = irq_to_desc(irq);
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return desc->status & IRQ_NO_BALANCING_MASK;
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}
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/* Handle irq action chains: */
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extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
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@ -363,42 +246,10 @@ extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_nested_irq(unsigned int irq);
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/*
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* Monolithic do_IRQ implementation.
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*/
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#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
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extern unsigned int __do_IRQ(unsigned int irq);
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#endif
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/*
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* Architectures call this to let the generic IRQ layer
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* handle an interrupt. If the descriptor is attached to an
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* irqchip-style controller then we call the ->handle_irq() handler,
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* and it calls __do_IRQ() if it's attached to an irqtype-style controller.
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*/
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static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
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{
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#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
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desc->handle_irq(irq, desc);
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#else
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if (likely(desc->handle_irq))
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desc->handle_irq(irq, desc);
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else
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__do_IRQ(irq);
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#endif
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}
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static inline void generic_handle_irq(unsigned int irq)
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{
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generic_handle_irq_desc(irq, irq_to_desc(irq));
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}
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/* Handling of unhandled and spurious interrupts: */
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extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
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irqreturn_t action_ret);
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/* Resending of interrupts :*/
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void check_irq_resend(struct irq_desc *desc, unsigned int irq);
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/* Enable/disable irq debugging output: */
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extern int noirqdebug_setup(char *str);
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@ -421,16 +272,6 @@ extern void
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__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
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const char *name);
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/* caller has locked the irq_desc and both params are valid */
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static inline void __set_irq_handler_unlocked(int irq,
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irq_flow_handler_t handler)
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{
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struct irq_desc *desc;
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desc = irq_to_desc(irq);
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desc->handle_irq = handler;
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}
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/*
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* Set a highlevel flow handler for a given IRQ:
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*/
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@ -462,13 +303,6 @@ extern unsigned int create_irq_nr(unsigned int irq_want, int node);
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extern int create_irq(void);
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extern void destroy_irq(unsigned int irq);
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/* Test to see if a driver has successfully requested an irq */
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static inline int irq_has_action(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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return desc->action != NULL;
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}
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/* Dynamic irq helper functions */
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extern void dynamic_irq_init(unsigned int irq);
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void dynamic_irq_init_keep_chip_data(unsigned int irq);
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@ -487,108 +321,8 @@ extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
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#define get_irq_data(irq) (irq_to_desc(irq)->irq_data.handler_data)
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#define get_irq_msi(irq) (irq_to_desc(irq)->irq_data.msi_desc)
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#define get_irq_desc_chip(desc) ((desc)->irq_data.chip)
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#define get_irq_desc_chip_data(desc) ((desc)->irq_data.chip_data)
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#define get_irq_desc_data(desc) ((desc)->irq_data.handler_data)
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#define get_irq_desc_msi(desc) ((desc)->irq_data.msi_desc)
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#endif /* CONFIG_GENERIC_HARDIRQS */
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#endif /* !CONFIG_S390 */
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#ifdef CONFIG_SMP
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/**
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* alloc_desc_masks - allocate cpumasks for irq_desc
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* @desc: pointer to irq_desc struct
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* @node: node which will be handling the cpumasks
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* @boot: true if need bootmem
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*
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* Allocates affinity and pending_mask cpumask if required.
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* Returns true if successful (or not required).
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*/
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static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
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bool boot)
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{
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gfp_t gfp = GFP_ATOMIC;
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if (boot)
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gfp = GFP_NOWAIT;
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#ifdef CONFIG_CPUMASK_OFFSTACK
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if (!alloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
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return false;
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
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free_cpumask_var(desc->irq_data.affinity);
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return false;
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}
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#endif
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#endif
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return true;
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}
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static inline void init_desc_masks(struct irq_desc *desc)
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{
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cpumask_setall(desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_clear(desc->pending_mask);
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#endif
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}
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/**
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* init_copy_desc_masks - copy cpumasks for irq_desc
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* @old_desc: pointer to old irq_desc struct
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* @new_desc: pointer to new irq_desc struct
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*
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* Insures affinity and pending_masks are copied to new irq_desc.
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* If !CONFIG_CPUMASKS_OFFSTACK the cpumasks are embedded in the
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* irq_desc struct so the copy is redundant.
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*/
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static inline void init_copy_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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#ifdef CONFIG_CPUMASK_OFFSTACK
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cpumask_copy(new_desc->irq_data.affinity, old_desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_copy(new_desc->pending_mask, old_desc->pending_mask);
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#endif
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#endif
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}
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static inline void free_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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free_cpumask_var(old_desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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free_cpumask_var(old_desc->pending_mask);
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#endif
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}
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#else /* !CONFIG_SMP */
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static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
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bool boot)
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{
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return true;
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}
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static inline void init_desc_masks(struct irq_desc *desc)
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{
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}
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static inline void init_copy_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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}
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static inline void free_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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}
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#endif /* CONFIG_SMP */
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#endif /* _LINUX_IRQ_H */
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@ -0,0 +1,171 @@
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#ifndef _LINUX_IRQDESC_H
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#define _LINUX_IRQDESC_H
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/*
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* Core internal functions to deal with irq descriptors
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*
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* This include will move to kernel/irq once we cleaned up the tree.
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* For now it's included from <linux/irq.h>
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*/
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struct proc_dir_entry;
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struct timer_rand_state;
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struct irq_2_iommu;
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/**
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* struct irq_desc - interrupt descriptor
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* @irq_data: per irq and chip data passed down to chip functions
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* @timer_rand_state: pointer to timer rand state struct
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* @kstat_irqs: irq stats per cpu
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* @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
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* @action: the irq action chain
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* @status: status information
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* @depth: disable-depth, for nested irq_disable() calls
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* @wake_depth: enable depth, for multiple set_irq_wake() callers
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* @irq_count: stats field to detect stalled irqs
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* @last_unhandled: aging timer for unhandled count
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* @irqs_unhandled: stats field for spurious unhandled interrupts
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* @lock: locking for SMP
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* @pending_mask: pending rebalanced interrupts
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* @threads_active: number of irqaction threads currently running
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* @wait_for_threads: wait queue for sync_irq to wait for threaded handlers
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* @dir: /proc/irq/ procfs entry
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* @name: flow handler name for /proc/interrupts output
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*/
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struct irq_desc {
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#ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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struct irq_data irq_data;
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#else
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/*
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* This union will go away, once we fixed the direct access to
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* irq_desc all over the place. The direct fields are a 1:1
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* overlay of irq_data.
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*/
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union {
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struct irq_data irq_data;
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struct {
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unsigned int irq;
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unsigned int node;
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struct irq_chip *chip;
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void *handler_data;
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void *chip_data;
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struct msi_desc *msi_desc;
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#ifdef CONFIG_SMP
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cpumask_var_t affinity;
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#endif
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#ifdef CONFIG_INTR_REMAP
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struct irq_2_iommu *irq_2_iommu;
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#endif
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};
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};
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#endif
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struct timer_rand_state *timer_rand_state;
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unsigned int *kstat_irqs;
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irq_flow_handler_t handle_irq;
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struct irqaction *action; /* IRQ action list */
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unsigned int status; /* IRQ status */
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unsigned int depth; /* nested irq disables */
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unsigned int wake_depth; /* nested wake enables */
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unsigned int irq_count; /* For detecting broken IRQs */
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unsigned long last_unhandled; /* Aging timer for unhandled count */
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unsigned int irqs_unhandled;
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raw_spinlock_t lock;
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#ifdef CONFIG_SMP
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const struct cpumask *affinity_hint;
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_var_t pending_mask;
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#endif
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#endif
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atomic_t threads_active;
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wait_queue_head_t wait_for_threads;
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *dir;
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#endif
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const char *name;
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} ____cacheline_internodealigned_in_smp;
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extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
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struct irq_desc *desc, int node);
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extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
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#ifndef CONFIG_SPARSE_IRQ
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extern struct irq_desc irq_desc[NR_IRQS];
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#endif
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#ifdef CONFIG_NUMA_IRQ_DESC
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extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
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#else
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static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
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{
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return desc;
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}
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#endif
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extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
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#ifdef CONFIG_GENERIC_HARDIRQS
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#define get_irq_desc_chip(desc) ((desc)->irq_data.chip)
|
||||
#define get_irq_desc_chip_data(desc) ((desc)->irq_data.chip_data)
|
||||
#define get_irq_desc_data(desc) ((desc)->irq_data.handler_data)
|
||||
#define get_irq_desc_msi(desc) ((desc)->irq_data.msi_desc)
|
||||
|
||||
/*
|
||||
* Monolithic do_IRQ implementation.
|
||||
*/
|
||||
#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
|
||||
extern unsigned int __do_IRQ(unsigned int irq);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Architectures call this to let the generic IRQ layer
|
||||
* handle an interrupt. If the descriptor is attached to an
|
||||
* irqchip-style controller then we call the ->handle_irq() handler,
|
||||
* and it calls __do_IRQ() if it's attached to an irqtype-style controller.
|
||||
*/
|
||||
static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
|
||||
{
|
||||
#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
|
||||
desc->handle_irq(irq, desc);
|
||||
#else
|
||||
if (likely(desc->handle_irq))
|
||||
desc->handle_irq(irq, desc);
|
||||
else
|
||||
__do_IRQ(irq);
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline void generic_handle_irq(unsigned int irq)
|
||||
{
|
||||
generic_handle_irq_desc(irq, irq_to_desc(irq));
|
||||
}
|
||||
|
||||
/* Test to see if a driver has successfully requested an irq */
|
||||
static inline int irq_has_action(unsigned int irq)
|
||||
{
|
||||
struct irq_desc *desc = irq_to_desc(irq);
|
||||
return desc->action != NULL;
|
||||
}
|
||||
|
||||
static inline int irq_balancing_disabled(unsigned int irq)
|
||||
{
|
||||
struct irq_desc *desc;
|
||||
|
||||
desc = irq_to_desc(irq);
|
||||
return desc->status & IRQ_NO_BALANCING_MASK;
|
||||
}
|
||||
|
||||
/* caller has locked the irq_desc and both params are valid */
|
||||
static inline void __set_irq_handler_unlocked(int irq,
|
||||
irq_flow_handler_t handler)
|
||||
{
|
||||
struct irq_desc *desc;
|
||||
|
||||
desc = irq_to_desc(irq);
|
||||
desc->handle_irq = handler;
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -1,6 +1,7 @@
|
|||
/*
|
||||
* IRQ subsystem internal functions and variables:
|
||||
*/
|
||||
#include <linux/irqdesc.h>
|
||||
|
||||
extern int noirqdebug;
|
||||
|
||||
|
|
@ -22,6 +23,9 @@ extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
|
|||
extern void clear_kstat_irqs(struct irq_desc *desc);
|
||||
extern raw_spinlock_t sparse_irq_lock;
|
||||
|
||||
/* Resending of interrupts :*/
|
||||
void check_irq_resend(struct irq_desc *desc, unsigned int irq);
|
||||
|
||||
#ifdef CONFIG_SPARSE_IRQ
|
||||
void replace_irq_desc(unsigned int irq, struct irq_desc *desc);
|
||||
#endif
|
||||
|
|
@ -105,3 +109,99 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
|
|||
|
||||
#undef P
|
||||
|
||||
/* Stuff below will be cleaned up after the sparse allocator is done */
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/**
|
||||
* alloc_desc_masks - allocate cpumasks for irq_desc
|
||||
* @desc: pointer to irq_desc struct
|
||||
* @node: node 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).
|
||||
*/
|
||||
static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
|
||||
bool boot)
|
||||
{
|
||||
gfp_t gfp = GFP_ATOMIC;
|
||||
|
||||
if (boot)
|
||||
gfp = GFP_NOWAIT;
|
||||
|
||||
#ifdef CONFIG_CPUMASK_OFFSTACK
|
||||
if (!alloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
|
||||
return false;
|
||||
|
||||
#ifdef CONFIG_GENERIC_PENDING_IRQ
|
||||
if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
|
||||
free_cpumask_var(desc->irq_data.affinity);
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline void init_desc_masks(struct irq_desc *desc)
|
||||
{
|
||||
cpumask_setall(desc->irq_data.affinity);
|
||||
#ifdef CONFIG_GENERIC_PENDING_IRQ
|
||||
cpumask_clear(desc->pending_mask);
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
* 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_CPUMASK_OFFSTACK
|
||||
cpumask_copy(new_desc->irq_data.affinity, old_desc->irq_data.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->irq_data.affinity);
|
||||
|
||||
#ifdef CONFIG_GENERIC_PENDING_IRQ
|
||||
free_cpumask_var(old_desc->pending_mask);
|
||||
#endif
|
||||
}
|
||||
|
||||
#else /* !CONFIG_SMP */
|
||||
|
||||
static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
|
||||
bool boot)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline void init_desc_masks(struct irq_desc *desc)
|
||||
{
|
||||
}
|
||||
|
||||
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 */
|
||||
|
|
|
|||
Reference in New Issue