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 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 63 unsigned long flags); 64 extern void __disable_irq(struct irq_desc *desc, unsigned int irq); 65 extern void __enable_irq(struct irq_desc *desc, unsigned int irq); 66 67 extern int irq_startup(struct irq_desc *desc, bool resend); 68 extern void irq_shutdown(struct irq_desc *desc); 69 extern void irq_enable(struct irq_desc *desc); 70 extern void irq_disable(struct irq_desc *desc); 71 extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); 72 extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); 73 extern void mask_irq(struct irq_desc *desc); 74 extern void unmask_irq(struct irq_desc *desc); 75 extern void unmask_threaded_irq(struct irq_desc *desc); 76 77 #ifdef CONFIG_SPARSE_IRQ 78 static inline void irq_mark_irq(unsigned int irq) { } 79 #else 80 extern void irq_mark_irq(unsigned int irq); 81 #endif 82 83 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 84 85 irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); 86 irqreturn_t handle_irq_event(struct irq_desc *desc); 87 88 /* Resending of interrupts :*/ 89 void check_irq_resend(struct irq_desc *desc, unsigned int irq); 90 bool irq_wait_for_poll(struct irq_desc *desc); 91 void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); 92 93 #ifdef CONFIG_PROC_FS 94 extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 95 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 96 extern void register_handler_proc(unsigned int irq, struct irqaction *action); 97 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 98 #else 99 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 100 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 101 static inline void register_handler_proc(unsigned int irq, 102 struct irqaction *action) { } 103 static inline void unregister_handler_proc(unsigned int irq, 104 struct irqaction *action) { } 105 #endif 106 107 extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 108 109 extern void irq_set_thread_affinity(struct irq_desc *desc); 110 111 extern int irq_do_set_affinity(struct irq_data *data, 112 const struct cpumask *dest, bool force); 113 114 /* Inline functions for support of irq chips on slow busses */ 115 static inline void chip_bus_lock(struct irq_desc *desc) 116 { 117 if (unlikely(desc->irq_data.chip->irq_bus_lock)) 118 desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 119 } 120 121 static inline void chip_bus_sync_unlock(struct irq_desc *desc) 122 { 123 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 124 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 125 } 126 127 #define _IRQ_DESC_CHECK (1 << 0) 128 #define _IRQ_DESC_PERCPU (1 << 1) 129 130 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) 131 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) 132 133 struct irq_desc * 134 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, 135 unsigned int check); 136 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); 137 138 static inline struct irq_desc * 139 irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) 140 { 141 return __irq_get_desc_lock(irq, flags, true, check); 142 } 143 144 static inline void 145 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) 146 { 147 __irq_put_desc_unlock(desc, flags, true); 148 } 149 150 static inline struct irq_desc * 151 irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) 152 { 153 return __irq_get_desc_lock(irq, flags, false, check); 154 } 155 156 static inline void 157 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 158 { 159 __irq_put_desc_unlock(desc, flags, false); 160 } 161 162 /* 163 * Manipulation functions for irq_data.state 164 */ 165 static inline void irqd_set_move_pending(struct irq_data *d) 166 { 167 __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING; 168 } 169 170 static inline void irqd_clr_move_pending(struct irq_data *d) 171 { 172 __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING; 173 } 174 175 static inline void irqd_clear(struct irq_data *d, unsigned int mask) 176 { 177 __irqd_to_state(d) &= ~mask; 178 } 179 180 static inline void irqd_set(struct irq_data *d, unsigned int mask) 181 { 182 __irqd_to_state(d) |= mask; 183 } 184 185 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) 186 { 187 return __irqd_to_state(d) & mask; 188 } 189 190 static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc) 191 { 192 __this_cpu_inc(*desc->kstat_irqs); 193 __this_cpu_inc(kstat.irqs_sum); 194 } 195 196 static inline int irq_desc_get_node(struct irq_desc *desc) 197 { 198 return irq_data_get_node(&desc->irq_data); 199 } 200 201 #ifdef CONFIG_PM_SLEEP 202 bool irq_pm_check_wakeup(struct irq_desc *desc); 203 void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); 204 void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); 205 #else 206 static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } 207 static inline void 208 irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } 209 static inline void 210 irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } 211 #endif 212