1 /* 2 * IRQ subsystem internal functions and variables: 3 * 4 * Do not ever include this file from anything else than 5 * kernel/irq/. Do not even think about using any information outside 6 * of this file for your non core code. 7 */ 8 #include <linux/irqdesc.h> 9 10 #ifdef CONFIG_SPARSE_IRQ 11 # define IRQ_BITMAP_BITS (NR_IRQS + 8196) 12 #else 13 # define IRQ_BITMAP_BITS NR_IRQS 14 #endif 15 16 #define istate core_internal_state__do_not_mess_with_it 17 18 extern int noirqdebug; 19 20 /* 21 * Bits used by threaded handlers: 22 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 23 * IRQTF_DIED - handler thread died 24 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed 25 * IRQTF_AFFINITY - irq thread is requested to adjust affinity 26 * IRQTF_FORCED_THREAD - irq action is force threaded 27 */ 28 enum { 29 IRQTF_RUNTHREAD, 30 IRQTF_DIED, 31 IRQTF_WARNED, 32 IRQTF_AFFINITY, 33 IRQTF_FORCED_THREAD, 34 }; 35 36 /* 37 * Bit masks for desc->state 38 * 39 * IRQS_AUTODETECT - autodetection in progress 40 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt 41 * detection 42 * IRQS_POLL_INPROGRESS - polling in progress 43 * IRQS_ONESHOT - irq is not unmasked in primary handler 44 * IRQS_REPLAY - irq is replayed 45 * IRQS_WAITING - irq is waiting 46 * IRQS_PENDING - irq is pending and replayed later 47 * IRQS_SUSPENDED - irq is suspended 48 */ 49 enum { 50 IRQS_AUTODETECT = 0x00000001, 51 IRQS_SPURIOUS_DISABLED = 0x00000002, 52 IRQS_POLL_INPROGRESS = 0x00000008, 53 IRQS_ONESHOT = 0x00000020, 54 IRQS_REPLAY = 0x00000040, 55 IRQS_WAITING = 0x00000080, 56 IRQS_PENDING = 0x00000200, 57 IRQS_SUSPENDED = 0x00000800, 58 }; 59 60 #include "debug.h" 61 #include "settings.h" 62 63 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) 64 65 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 66 unsigned long flags); 67 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); 68 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); 69 70 extern int irq_startup(struct irq_desc *desc); 71 extern void irq_shutdown(struct irq_desc *desc); 72 extern void irq_enable(struct irq_desc *desc); 73 extern void irq_disable(struct irq_desc *desc); 74 extern void mask_irq(struct irq_desc *desc); 75 extern void unmask_irq(struct irq_desc *desc); 76 77 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 78 79 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); 80 irqreturn_t handle_irq_event(struct irq_desc *desc); 81 82 /* Resending of interrupts :*/ 83 void check_irq_resend(struct irq_desc *desc, unsigned int irq); 84 bool irq_wait_for_poll(struct irq_desc *desc); 85 86 #ifdef CONFIG_PROC_FS 87 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 88 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 89 extern void register_handler_proc(unsigned int irq, struct irqaction *action); 90 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 91 #else 92 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 93 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 94 static inline void register_handler_proc(unsigned int irq, 95 struct irqaction *action) { } 96 static inline void unregister_handler_proc(unsigned int irq, 97 struct irqaction *action) { } 98 #endif 99 100 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 101 102 extern void irq_set_thread_affinity(struct irq_desc *desc); 103 104 /* Inline functions for support of irq chips on slow busses */ 105 static inline void chip_bus_lock(struct irq_desc *desc) 106 { 107 if (unlikely(desc->irq_data.chip->irq_bus_lock)) 108 desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 109 } 110 111 static inline void chip_bus_sync_unlock(struct irq_desc *desc) 112 { 113 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 114 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 115 } 116 117 struct irq_desc * 118 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus); 119 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); 120 121 static inline struct irq_desc * 122 irq_get_desc_buslock(unsigned int irq, unsigned long *flags) 123 { 124 return __irq_get_desc_lock(irq, flags, true); 125 } 126 127 static inline void 128 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) 129 { 130 __irq_put_desc_unlock(desc, flags, true); 131 } 132 133 static inline struct irq_desc * 134 irq_get_desc_lock(unsigned int irq, unsigned long *flags) 135 { 136 return __irq_get_desc_lock(irq, flags, false); 137 } 138 139 static inline void 140 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 141 { 142 __irq_put_desc_unlock(desc, flags, false); 143 } 144 145 /* 146 * Manipulation functions for irq_data.state 147 */ 148 static inline void irqd_set_move_pending(struct irq_data *d) 149 { 150 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; 151 } 152 153 static inline void irqd_clr_move_pending(struct irq_data *d) 154 { 155 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; 156 } 157 158 static inline void irqd_clear(struct irq_data *d, unsigned int mask) 159 { 160 d->state_use_accessors &= ~mask; 161 } 162 163 static inline void irqd_set(struct irq_data *d, unsigned int mask) 164 { 165 d->state_use_accessors |= mask; 166 } 167 168 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) 169 { 170 return d->state_use_accessors & mask; 171 } 172