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 #ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT 19 # define status status_use_accessors 20 #endif 21 22 extern int noirqdebug; 23 24 /* 25 * Bits used by threaded handlers: 26 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 27 * IRQTF_DIED - handler thread died 28 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed 29 * IRQTF_AFFINITY - irq thread is requested to adjust affinity 30 * IRQTF_FORCED_THREAD - irq action is force threaded 31 */ 32 enum { 33 IRQTF_RUNTHREAD, 34 IRQTF_DIED, 35 IRQTF_WARNED, 36 IRQTF_AFFINITY, 37 IRQTF_FORCED_THREAD, 38 }; 39 40 /* 41 * Bit masks for desc->state 42 * 43 * IRQS_AUTODETECT - autodetection in progress 44 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt 45 * detection 46 * IRQS_POLL_INPROGRESS - polling in progress 47 * IRQS_INPROGRESS - Interrupt in progress 48 * IRQS_ONESHOT - irq is not unmasked in primary handler 49 * IRQS_REPLAY - irq is replayed 50 * IRQS_WAITING - irq is waiting 51 * IRQS_DISABLED - irq is disabled 52 * IRQS_PENDING - irq is pending and replayed later 53 * IRQS_MASKED - irq is masked 54 * IRQS_SUSPENDED - irq is suspended 55 */ 56 enum { 57 IRQS_AUTODETECT = 0x00000001, 58 IRQS_SPURIOUS_DISABLED = 0x00000002, 59 IRQS_POLL_INPROGRESS = 0x00000008, 60 IRQS_INPROGRESS = 0x00000010, 61 IRQS_ONESHOT = 0x00000020, 62 IRQS_REPLAY = 0x00000040, 63 IRQS_WAITING = 0x00000080, 64 IRQS_DISABLED = 0x00000100, 65 IRQS_PENDING = 0x00000200, 66 IRQS_MASKED = 0x00000400, 67 IRQS_SUSPENDED = 0x00000800, 68 }; 69 70 #include "compat.h" 71 #include "debug.h" 72 #include "settings.h" 73 74 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) 75 76 /* Set default functions for irq_chip structures: */ 77 extern void irq_chip_set_defaults(struct irq_chip *chip); 78 79 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 80 unsigned long flags); 81 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); 82 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); 83 84 extern int irq_startup(struct irq_desc *desc); 85 extern void irq_shutdown(struct irq_desc *desc); 86 extern void irq_enable(struct irq_desc *desc); 87 extern void irq_disable(struct irq_desc *desc); 88 extern void mask_irq(struct irq_desc *desc); 89 extern void unmask_irq(struct irq_desc *desc); 90 91 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 92 93 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); 94 irqreturn_t handle_irq_event(struct irq_desc *desc); 95 96 /* Resending of interrupts :*/ 97 void check_irq_resend(struct irq_desc *desc, unsigned int irq); 98 bool irq_wait_for_poll(struct irq_desc *desc); 99 100 #ifdef CONFIG_PROC_FS 101 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 102 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 103 extern void register_handler_proc(unsigned int irq, struct irqaction *action); 104 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 105 #else 106 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 107 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 108 static inline void register_handler_proc(unsigned int irq, 109 struct irqaction *action) { } 110 static inline void unregister_handler_proc(unsigned int irq, 111 struct irqaction *action) { } 112 #endif 113 114 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 115 116 extern void irq_set_thread_affinity(struct irq_desc *desc); 117 118 /* Inline functions for support of irq chips on slow busses */ 119 static inline void chip_bus_lock(struct irq_desc *desc) 120 { 121 if (unlikely(desc->irq_data.chip->irq_bus_lock)) 122 desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 123 } 124 125 static inline void chip_bus_sync_unlock(struct irq_desc *desc) 126 { 127 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 128 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 129 } 130 131 struct irq_desc * 132 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus); 133 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); 134 135 static inline struct irq_desc * 136 irq_get_desc_buslock(unsigned int irq, unsigned long *flags) 137 { 138 return __irq_get_desc_lock(irq, flags, true); 139 } 140 141 static inline void 142 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) 143 { 144 __irq_put_desc_unlock(desc, flags, true); 145 } 146 147 static inline struct irq_desc * 148 irq_get_desc_lock(unsigned int irq, unsigned long *flags) 149 { 150 return __irq_get_desc_lock(irq, flags, false); 151 } 152 153 static inline void 154 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 155 { 156 __irq_put_desc_unlock(desc, flags, false); 157 } 158 159 /* 160 * Manipulation functions for irq_data.state 161 */ 162 static inline void irqd_set_move_pending(struct irq_data *d) 163 { 164 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; 165 irq_compat_set_move_pending(irq_data_to_desc(d)); 166 } 167 168 static inline void irqd_clr_move_pending(struct irq_data *d) 169 { 170 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; 171 irq_compat_clr_move_pending(irq_data_to_desc(d)); 172 } 173 174 static inline void irqd_clear(struct irq_data *d, unsigned int mask) 175 { 176 d->state_use_accessors &= ~mask; 177 } 178 179 static inline void irqd_set(struct irq_data *d, unsigned int mask) 180 { 181 d->state_use_accessors |= mask; 182 } 183 184 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) 185 { 186 return d->state_use_accessors & mask; 187 } 188