Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_IRQDESC_H |
| 2 | #define _LINUX_IRQDESC_H |
| 3 | |
| 4 | /* |
| 5 | * Core internal functions to deal with irq descriptors |
| 6 | * |
| 7 | * This include will move to kernel/irq once we cleaned up the tree. |
| 8 | * For now it's included from <linux/irq.h> |
| 9 | */ |
| 10 | |
Ben Hutchings | cd7eab4 | 2011-01-19 21:01:44 +0000 | [diff] [blame] | 11 | struct irq_affinity_notify; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 12 | struct proc_dir_entry; |
| 13 | struct timer_rand_state; |
Paul Gortmaker | ec53cf2 | 2011-09-19 20:33:19 -0400 | [diff] [blame^] | 14 | struct module; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 15 | /** |
| 16 | * struct irq_desc - interrupt descriptor |
| 17 | * @irq_data: per irq and chip data passed down to chip functions |
| 18 | * @timer_rand_state: pointer to timer rand state struct |
| 19 | * @kstat_irqs: irq stats per cpu |
Geert Uytterhoeven | 7707677 | 2011-04-10 11:01:52 +0200 | [diff] [blame] | 20 | * @handle_irq: highlevel irq-events handler |
| 21 | * @preflow_handler: handler called before the flow handler (currently used by sparc) |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 22 | * @action: the irq action chain |
| 23 | * @status: status information |
Thomas Gleixner | dbec07b | 2011-02-07 20:19:55 +0100 | [diff] [blame] | 24 | * @core_internal_state__do_not_mess_with_it: core internal status information |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 25 | * @depth: disable-depth, for nested irq_disable() calls |
Geert Uytterhoeven | 0911f12 | 2011-04-10 11:01:51 +0200 | [diff] [blame] | 26 | * @wake_depth: enable depth, for multiple irq_set_irq_wake() callers |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 27 | * @irq_count: stats field to detect stalled irqs |
| 28 | * @last_unhandled: aging timer for unhandled count |
| 29 | * @irqs_unhandled: stats field for spurious unhandled interrupts |
| 30 | * @lock: locking for SMP |
Geert Uytterhoeven | 7707677 | 2011-04-10 11:01:52 +0200 | [diff] [blame] | 31 | * @affinity_hint: hint to user space for preferred irq affinity |
Ben Hutchings | cd7eab4 | 2011-01-19 21:01:44 +0000 | [diff] [blame] | 32 | * @affinity_notify: context for notification of affinity changes |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 33 | * @pending_mask: pending rebalanced interrupts |
Thomas Gleixner | b5faba2 | 2011-02-23 23:52:13 +0000 | [diff] [blame] | 34 | * @threads_oneshot: bitfield to handle shared oneshot threads |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 35 | * @threads_active: number of irqaction threads currently running |
| 36 | * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers |
| 37 | * @dir: /proc/irq/ procfs entry |
| 38 | * @name: flow handler name for /proc/interrupts output |
| 39 | */ |
| 40 | struct irq_desc { |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 41 | struct irq_data irq_data; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 42 | struct timer_rand_state *timer_rand_state; |
Eric Dumazet | 6c9ae00 | 2011-01-13 15:45:38 -0800 | [diff] [blame] | 43 | unsigned int __percpu *kstat_irqs; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 44 | irq_flow_handler_t handle_irq; |
Thomas Gleixner | 7812957 | 2011-02-10 15:14:20 +0100 | [diff] [blame] | 45 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
| 46 | irq_preflow_handler_t preflow_handler; |
| 47 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 48 | struct irqaction *action; /* IRQ action list */ |
Thomas Gleixner | a6967ca | 2011-02-10 22:01:25 +0100 | [diff] [blame] | 49 | unsigned int status_use_accessors; |
Thomas Gleixner | dbec07b | 2011-02-07 20:19:55 +0100 | [diff] [blame] | 50 | unsigned int core_internal_state__do_not_mess_with_it; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 51 | unsigned int depth; /* nested irq disables */ |
| 52 | unsigned int wake_depth; /* nested wake enables */ |
| 53 | unsigned int irq_count; /* For detecting broken IRQs */ |
| 54 | unsigned long last_unhandled; /* Aging timer for unhandled count */ |
| 55 | unsigned int irqs_unhandled; |
| 56 | raw_spinlock_t lock; |
Marc Zyngier | 31d9d9b | 2011-09-23 17:03:06 +0100 | [diff] [blame] | 57 | struct cpumask *percpu_enabled; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 58 | #ifdef CONFIG_SMP |
| 59 | const struct cpumask *affinity_hint; |
Ben Hutchings | cd7eab4 | 2011-01-19 21:01:44 +0000 | [diff] [blame] | 60 | struct irq_affinity_notify *affinity_notify; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 61 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
| 62 | cpumask_var_t pending_mask; |
| 63 | #endif |
| 64 | #endif |
Thomas Gleixner | b5faba2 | 2011-02-23 23:52:13 +0000 | [diff] [blame] | 65 | unsigned long threads_oneshot; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 66 | atomic_t threads_active; |
| 67 | wait_queue_head_t wait_for_threads; |
| 68 | #ifdef CONFIG_PROC_FS |
| 69 | struct proc_dir_entry *dir; |
| 70 | #endif |
Sebastian Andrzej Siewior | b687380 | 2011-07-11 12:17:31 +0200 | [diff] [blame] | 71 | struct module *owner; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 72 | const char *name; |
| 73 | } ____cacheline_internodealigned_in_smp; |
| 74 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 75 | #ifndef CONFIG_SPARSE_IRQ |
| 76 | extern struct irq_desc irq_desc[NR_IRQS]; |
| 77 | #endif |
| 78 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 79 | #ifdef CONFIG_GENERIC_HARDIRQS |
| 80 | |
Thomas Gleixner | d9936bb | 2011-03-11 14:15:35 +0100 | [diff] [blame] | 81 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
| 82 | { |
| 83 | return &desc->irq_data; |
| 84 | } |
| 85 | |
Thomas Gleixner | a0cd9ca | 2011-02-10 11:36:33 +0100 | [diff] [blame] | 86 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
| 87 | { |
| 88 | return desc->irq_data.chip; |
| 89 | } |
| 90 | |
| 91 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) |
| 92 | { |
| 93 | return desc->irq_data.chip_data; |
| 94 | } |
| 95 | |
| 96 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) |
| 97 | { |
| 98 | return desc->irq_data.handler_data; |
| 99 | } |
| 100 | |
| 101 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) |
| 102 | { |
| 103 | return desc->irq_data.msi_desc; |
| 104 | } |
| 105 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 106 | /* |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 107 | * Architectures call this to let the generic IRQ layer |
| 108 | * handle an interrupt. If the descriptor is attached to an |
| 109 | * irqchip-style controller then we call the ->handle_irq() handler, |
| 110 | * and it calls __do_IRQ() if it's attached to an irqtype-style controller. |
| 111 | */ |
| 112 | static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) |
| 113 | { |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 114 | desc->handle_irq(irq, desc); |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 115 | } |
| 116 | |
Thomas Gleixner | fe12bc2 | 2011-05-18 12:48:00 +0200 | [diff] [blame] | 117 | int generic_handle_irq(unsigned int irq); |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 118 | |
| 119 | /* Test to see if a driver has successfully requested an irq */ |
| 120 | static inline int irq_has_action(unsigned int irq) |
| 121 | { |
| 122 | struct irq_desc *desc = irq_to_desc(irq); |
| 123 | return desc->action != NULL; |
| 124 | } |
| 125 | |
Thomas Gleixner | a2e8461 | 2011-03-23 13:10:31 +0100 | [diff] [blame] | 126 | /* caller has locked the irq_desc and both params are valid */ |
| 127 | static inline void __irq_set_handler_locked(unsigned int irq, |
| 128 | irq_flow_handler_t handler) |
| 129 | { |
| 130 | struct irq_desc *desc; |
| 131 | |
| 132 | desc = irq_to_desc(irq); |
| 133 | desc->handle_irq = handler; |
| 134 | } |
| 135 | |
| 136 | /* caller has locked the irq_desc and both params are valid */ |
| 137 | static inline void |
| 138 | __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip, |
| 139 | irq_flow_handler_t handler, const char *name) |
| 140 | { |
| 141 | struct irq_desc *desc; |
| 142 | |
| 143 | desc = irq_to_desc(irq); |
| 144 | irq_desc_get_irq_data(desc)->chip = chip; |
| 145 | desc->handle_irq = handler; |
| 146 | desc->name = name; |
| 147 | } |
| 148 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 149 | static inline int irq_balancing_disabled(unsigned int irq) |
| 150 | { |
| 151 | struct irq_desc *desc; |
| 152 | |
| 153 | desc = irq_to_desc(irq); |
Thomas Gleixner | 0c6f8a8 | 2011-03-28 13:32:20 +0200 | [diff] [blame] | 154 | return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 155 | } |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 156 | |
Thomas Gleixner | d3e17de | 2011-03-22 17:08:15 +0100 | [diff] [blame] | 157 | static inline void |
| 158 | irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) |
| 159 | { |
| 160 | struct irq_desc *desc = irq_to_desc(irq); |
| 161 | |
| 162 | if (desc) |
| 163 | lockdep_set_class(&desc->lock, class); |
| 164 | } |
| 165 | |
Thomas Gleixner | 7812957 | 2011-02-10 15:14:20 +0100 | [diff] [blame] | 166 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
| 167 | static inline void |
| 168 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) |
| 169 | { |
| 170 | struct irq_desc *desc; |
| 171 | |
| 172 | desc = irq_to_desc(irq); |
| 173 | desc->preflow_handler = handler; |
| 174 | } |
| 175 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 176 | #endif |
| 177 | |
| 178 | #endif |