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