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 #include <linux/kernel_stat.h> 10 11 #ifdef CONFIG_SPARSE_IRQ 12 # define IRQ_BITMAP_BITS (NR_IRQS + 8196) 13 #else 14 # define IRQ_BITMAP_BITS NR_IRQS 15 #endif 16 17 #define istate core_internal_state__do_not_mess_with_it 18 19 extern bool noirqdebug; 20 21 /* 22 * Bits used by threaded handlers: 23 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 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_WARNED, 31 IRQTF_AFFINITY, 32 IRQTF_FORCED_THREAD, 33 }; 34 35 /* 36 * Bit masks for desc->core_internal_state__do_not_mess_with_it 37 * 38 * IRQS_AUTODETECT - autodetection in progress 39 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt 40 * detection 41 * IRQS_POLL_INPROGRESS - polling in progress 42 * IRQS_ONESHOT - irq is not unmasked in primary handler 43 * IRQS_REPLAY - irq is replayed 44 * IRQS_WAITING - irq is waiting 45 * IRQS_PENDING - irq is pending and replayed later 46 * IRQS_SUSPENDED - irq is suspended 47 */ 48 enum { 49 IRQS_AUTODETECT = 0x00000001, 50 IRQS_SPURIOUS_DISABLED = 0x00000002, 51 IRQS_POLL_INPROGRESS = 0x00000008, 52 IRQS_ONESHOT = 0x00000020, 53 IRQS_REPLAY = 0x00000040, 54 IRQS_WAITING = 0x00000080, 55 IRQS_PENDING = 0x00000200, 56 IRQS_SUSPENDED = 0x00000800, 57 }; 58 59 #include "debug.h" 60 #include "settings.h" 61 62 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) 63 64 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 65 unsigned long flags); 66 extern void __disable_irq(struct irq_desc *desc, unsigned int irq); 67 extern void __enable_irq(struct irq_desc *desc, unsigned int irq); 68 69 extern int irq_startup(struct irq_desc *desc, bool resend); 70 extern void irq_shutdown(struct irq_desc *desc); 71 extern void irq_enable(struct irq_desc *desc); 72 extern void irq_disable(struct irq_desc *desc); 73 extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); 74 extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); 75 extern void mask_irq(struct irq_desc *desc); 76 extern void unmask_irq(struct irq_desc *desc); 77 extern void unmask_threaded_irq(struct irq_desc *desc); 78 79 #ifdef CONFIG_SPARSE_IRQ 80 static inline void irq_mark_irq(unsigned int irq) { } 81 extern void irq_lock_sparse(void); 82 extern void irq_unlock_sparse(void); 83 #else 84 extern void irq_mark_irq(unsigned int irq); 85 static inline void irq_lock_sparse(void) { } 86 static inline void irq_unlock_sparse(void) { } 87 #endif 88 89 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 90 91 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); 92 irqreturn_t handle_irq_event(struct irq_desc *desc); 93 94 /* Resending of interrupts :*/ 95 void check_irq_resend(struct irq_desc *desc, unsigned int irq); 96 bool irq_wait_for_poll(struct irq_desc *desc); 97 void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); 98 99 #ifdef CONFIG_PROC_FS 100 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 101 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 102 extern void register_handler_proc(unsigned int irq, struct irqaction *action); 103 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 104 #else 105 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 106 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 107 static inline void register_handler_proc(unsigned int irq, 108 struct irqaction *action) { } 109 static inline void unregister_handler_proc(unsigned int irq, 110 struct irqaction *action) { } 111 #endif 112 113 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 114 115 extern void irq_set_thread_affinity(struct irq_desc *desc); 116 117 extern int irq_do_set_affinity(struct irq_data *data, 118 const struct cpumask *dest, bool force); 119 120 /* Inline functions for support of irq chips on slow busses */ 121 static inline void chip_bus_lock(struct irq_desc *desc) 122 { 123 if (unlikely(desc->irq_data.chip->irq_bus_lock)) 124 desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 125 } 126 127 static inline void chip_bus_sync_unlock(struct irq_desc *desc) 128 { 129 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 130 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 131 } 132 133 #define _IRQ_DESC_CHECK (1 << 0) 134 #define _IRQ_DESC_PERCPU (1 << 1) 135 136 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) 137 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) 138 139 struct irq_desc * 140 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, 141 unsigned int check); 142 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); 143 144 static inline struct irq_desc * 145 irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) 146 { 147 return __irq_get_desc_lock(irq, flags, true, check); 148 } 149 150 static inline void 151 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) 152 { 153 __irq_put_desc_unlock(desc, flags, true); 154 } 155 156 static inline struct irq_desc * 157 irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) 158 { 159 return __irq_get_desc_lock(irq, flags, false, check); 160 } 161 162 static inline void 163 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 164 { 165 __irq_put_desc_unlock(desc, flags, false); 166 } 167 168 /* 169 * Manipulation functions for irq_data.state 170 */ 171 static inline void irqd_set_move_pending(struct irq_data *d) 172 { 173 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; 174 } 175 176 static inline void irqd_clr_move_pending(struct irq_data *d) 177 { 178 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; 179 } 180 181 static inline void irqd_clear(struct irq_data *d, unsigned int mask) 182 { 183 d->state_use_accessors &= ~mask; 184 } 185 186 static inline void irqd_set(struct irq_data *d, unsigned int mask) 187 { 188 d->state_use_accessors |= mask; 189 } 190 191 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) 192 { 193 return d->state_use_accessors & mask; 194 } 195 196 static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc) 197 { 198 __this_cpu_inc(*desc->kstat_irqs); 199 __this_cpu_inc(kstat.irqs_sum); 200 } 201 202 #ifdef CONFIG_PM_SLEEP 203 bool irq_pm_check_wakeup(struct irq_desc *desc); 204 void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); 205 void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); 206 #else 207 static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } 208 static inline void 209 irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } 210 static inline void 211 irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } 212 #endif 213