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; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 14 | /** |
| 15 | * struct irq_desc - interrupt descriptor |
| 16 | * @irq_data: per irq and chip data passed down to chip functions |
| 17 | * @timer_rand_state: pointer to timer rand state struct |
| 18 | * @kstat_irqs: irq stats per cpu |
| 19 | * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()] |
| 20 | * @action: the irq action chain |
| 21 | * @status: status information |
Thomas Gleixner | dbec07b | 2011-02-07 20:19:55 +0100 | [diff] [blame] | 22 | * @core_internal_state__do_not_mess_with_it: core internal status information |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 23 | * @depth: disable-depth, for nested irq_disable() calls |
| 24 | * @wake_depth: enable depth, for multiple set_irq_wake() callers |
| 25 | * @irq_count: stats field to detect stalled irqs |
| 26 | * @last_unhandled: aging timer for unhandled count |
| 27 | * @irqs_unhandled: stats field for spurious unhandled interrupts |
| 28 | * @lock: locking for SMP |
Ben Hutchings | cd7eab4 | 2011-01-19 21:01:44 +0000 | [diff] [blame] | 29 | * @affinity_notify: context for notification of affinity changes |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 30 | * @pending_mask: pending rebalanced interrupts |
Thomas Gleixner | b5faba2 | 2011-02-23 23:52:13 +0000 | [diff] [blame] | 31 | * @threads_oneshot: bitfield to handle shared oneshot threads |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 32 | * @threads_active: number of irqaction threads currently running |
| 33 | * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers |
| 34 | * @dir: /proc/irq/ procfs entry |
| 35 | * @name: flow handler name for /proc/interrupts output |
| 36 | */ |
| 37 | struct irq_desc { |
| 38 | |
| 39 | #ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED |
| 40 | struct irq_data irq_data; |
| 41 | #else |
| 42 | /* |
| 43 | * This union will go away, once we fixed the direct access to |
| 44 | * irq_desc all over the place. The direct fields are a 1:1 |
| 45 | * overlay of irq_data. |
| 46 | */ |
| 47 | union { |
| 48 | struct irq_data irq_data; |
| 49 | struct { |
| 50 | unsigned int irq; |
| 51 | unsigned int node; |
Thomas Gleixner | 91c4991 | 2011-02-03 20:48:29 +0100 | [diff] [blame] | 52 | unsigned int pad_do_not_even_think_about_it; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 53 | struct irq_chip *chip; |
| 54 | void *handler_data; |
| 55 | void *chip_data; |
| 56 | struct msi_desc *msi_desc; |
| 57 | #ifdef CONFIG_SMP |
| 58 | cpumask_var_t affinity; |
| 59 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 60 | }; |
| 61 | }; |
| 62 | #endif |
| 63 | |
| 64 | struct timer_rand_state *timer_rand_state; |
Eric Dumazet | 6c9ae00 | 2011-01-13 15:45:38 -0800 | [diff] [blame] | 65 | unsigned int __percpu *kstat_irqs; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 66 | irq_flow_handler_t handle_irq; |
Thomas Gleixner | 7812957 | 2011-02-10 15:14:20 +0100 | [diff] [blame] | 67 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
| 68 | irq_preflow_handler_t preflow_handler; |
| 69 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 70 | struct irqaction *action; /* IRQ action list */ |
Thomas Gleixner | a6967ca | 2011-02-10 22:01:25 +0100 | [diff] [blame] | 71 | #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT |
| 72 | unsigned int status_use_accessors; |
| 73 | #else |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 74 | unsigned int status; /* IRQ status */ |
Thomas Gleixner | a6967ca | 2011-02-10 22:01:25 +0100 | [diff] [blame] | 75 | #endif |
Thomas Gleixner | dbec07b | 2011-02-07 20:19:55 +0100 | [diff] [blame] | 76 | unsigned int core_internal_state__do_not_mess_with_it; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 77 | unsigned int depth; /* nested irq disables */ |
| 78 | unsigned int wake_depth; /* nested wake enables */ |
| 79 | unsigned int irq_count; /* For detecting broken IRQs */ |
| 80 | unsigned long last_unhandled; /* Aging timer for unhandled count */ |
| 81 | unsigned int irqs_unhandled; |
| 82 | raw_spinlock_t lock; |
| 83 | #ifdef CONFIG_SMP |
| 84 | const struct cpumask *affinity_hint; |
Ben Hutchings | cd7eab4 | 2011-01-19 21:01:44 +0000 | [diff] [blame] | 85 | struct irq_affinity_notify *affinity_notify; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 86 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
| 87 | cpumask_var_t pending_mask; |
| 88 | #endif |
| 89 | #endif |
Thomas Gleixner | b5faba2 | 2011-02-23 23:52:13 +0000 | [diff] [blame] | 90 | unsigned long threads_oneshot; |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 91 | atomic_t threads_active; |
| 92 | wait_queue_head_t wait_for_threads; |
| 93 | #ifdef CONFIG_PROC_FS |
| 94 | struct proc_dir_entry *dir; |
| 95 | #endif |
| 96 | const char *name; |
| 97 | } ____cacheline_internodealigned_in_smp; |
| 98 | |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 99 | #ifndef CONFIG_SPARSE_IRQ |
| 100 | extern struct irq_desc irq_desc[NR_IRQS]; |
| 101 | #endif |
| 102 | |
Thomas Gleixner | 78f90d9 | 2010-09-29 17:18:47 +0200 | [diff] [blame] | 103 | /* Will be removed once the last users in power and sh are gone */ |
| 104 | extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node); |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 105 | static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node) |
| 106 | { |
| 107 | return desc; |
| 108 | } |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 109 | |
| 110 | #ifdef CONFIG_GENERIC_HARDIRQS |
| 111 | |
Thomas Gleixner | d9936bb | 2011-03-11 14:15:35 +0100 | [diff] [blame^] | 112 | static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) |
| 113 | { |
| 114 | return &desc->irq_data; |
| 115 | } |
| 116 | |
Thomas Gleixner | a0cd9ca | 2011-02-10 11:36:33 +0100 | [diff] [blame] | 117 | static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) |
| 118 | { |
| 119 | return desc->irq_data.chip; |
| 120 | } |
| 121 | |
| 122 | static inline void *irq_desc_get_chip_data(struct irq_desc *desc) |
| 123 | { |
| 124 | return desc->irq_data.chip_data; |
| 125 | } |
| 126 | |
| 127 | static inline void *irq_desc_get_handler_data(struct irq_desc *desc) |
| 128 | { |
| 129 | return desc->irq_data.handler_data; |
| 130 | } |
| 131 | |
| 132 | static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) |
| 133 | { |
| 134 | return desc->irq_data.msi_desc; |
| 135 | } |
| 136 | |
| 137 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT |
| 138 | static inline struct irq_chip *get_irq_desc_chip(struct irq_desc *desc) |
| 139 | { |
| 140 | return irq_desc_get_chip(desc); |
| 141 | } |
| 142 | static inline void *get_irq_desc_data(struct irq_desc *desc) |
| 143 | { |
| 144 | return irq_desc_get_handler_data(desc); |
| 145 | } |
| 146 | |
| 147 | static inline void *get_irq_desc_chip_data(struct irq_desc *desc) |
| 148 | { |
| 149 | return irq_desc_get_chip_data(desc); |
| 150 | } |
| 151 | |
| 152 | static inline struct msi_desc *get_irq_desc_msi(struct irq_desc *desc) |
| 153 | { |
| 154 | return irq_desc_get_msi_desc(desc); |
| 155 | } |
| 156 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 157 | |
| 158 | /* |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 159 | * Architectures call this to let the generic IRQ layer |
| 160 | * handle an interrupt. If the descriptor is attached to an |
| 161 | * irqchip-style controller then we call the ->handle_irq() handler, |
| 162 | * and it calls __do_IRQ() if it's attached to an irqtype-style controller. |
| 163 | */ |
| 164 | static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) |
| 165 | { |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 166 | desc->handle_irq(irq, desc); |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | static inline void generic_handle_irq(unsigned int irq) |
| 170 | { |
| 171 | generic_handle_irq_desc(irq, irq_to_desc(irq)); |
| 172 | } |
| 173 | |
| 174 | /* Test to see if a driver has successfully requested an irq */ |
| 175 | static inline int irq_has_action(unsigned int irq) |
| 176 | { |
| 177 | struct irq_desc *desc = irq_to_desc(irq); |
| 178 | return desc->action != NULL; |
| 179 | } |
| 180 | |
Thomas Gleixner | a6967ca | 2011-02-10 22:01:25 +0100 | [diff] [blame] | 181 | #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 182 | static inline int irq_balancing_disabled(unsigned int irq) |
| 183 | { |
| 184 | struct irq_desc *desc; |
| 185 | |
| 186 | desc = irq_to_desc(irq); |
| 187 | return desc->status & IRQ_NO_BALANCING_MASK; |
| 188 | } |
Thomas Gleixner | a6967ca | 2011-02-10 22:01:25 +0100 | [diff] [blame] | 189 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 190 | |
| 191 | /* caller has locked the irq_desc and both params are valid */ |
| 192 | static inline void __set_irq_handler_unlocked(int irq, |
| 193 | irq_flow_handler_t handler) |
| 194 | { |
| 195 | struct irq_desc *desc; |
| 196 | |
| 197 | desc = irq_to_desc(irq); |
| 198 | desc->handle_irq = handler; |
| 199 | } |
Thomas Gleixner | 7812957 | 2011-02-10 15:14:20 +0100 | [diff] [blame] | 200 | |
| 201 | #ifdef CONFIG_IRQ_PREFLOW_FASTEOI |
| 202 | static inline void |
| 203 | __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) |
| 204 | { |
| 205 | struct irq_desc *desc; |
| 206 | |
| 207 | desc = irq_to_desc(irq); |
| 208 | desc->preflow_handler = handler; |
| 209 | } |
| 210 | #endif |
Thomas Gleixner | e144710 | 2010-10-01 16:03:45 +0200 | [diff] [blame] | 211 | #endif |
| 212 | |
| 213 | #endif |