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 bool noirqdebug; 19 20 /* 21 * Bits used by threaded handlers: 22 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 23 * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed 24 * IRQTF_AFFINITY - irq thread is requested to adjust affinity 25 * IRQTF_FORCED_THREAD - irq action is force threaded 26 */ 27 enum { 28 IRQTF_RUNTHREAD, 29 IRQTF_WARNED, 30 IRQTF_AFFINITY, 31 IRQTF_FORCED_THREAD, 32 }; 33 34 /* 35 * Bit masks for desc->state 36 * 37 * IRQS_AUTODETECT - autodetection in progress 38 * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt 39 * detection 40 * IRQS_POLL_INPROGRESS - polling in progress 41 * IRQS_ONESHOT - irq is not unmasked in primary handler 42 * IRQS_REPLAY - irq is replayed 43 * IRQS_WAITING - irq is waiting 44 * IRQS_PENDING - irq is pending and replayed later 45 * IRQS_SUSPENDED - irq is suspended 46 */ 47 enum { 48 IRQS_AUTODETECT = 0x00000001, 49 IRQS_SPURIOUS_DISABLED = 0x00000002, 50 IRQS_POLL_INPROGRESS = 0x00000008, 51 IRQS_ONESHOT = 0x00000020, 52 IRQS_REPLAY = 0x00000040, 53 IRQS_WAITING = 0x00000080, 54 IRQS_PENDING = 0x00000200, 55 IRQS_SUSPENDED = 0x00000800, 56 }; 57 58 #include "debug.h" 59 #include "settings.h" 60 61 #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) 62 63 extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 64 unsigned long flags); 65 extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); 66 extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); 67 68 extern int irq_startup(struct irq_desc *desc, bool resend); 69 extern void irq_shutdown(struct irq_desc *desc); 70 extern void irq_enable(struct irq_desc *desc); 71 extern void irq_disable(struct irq_desc *desc); 72 extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); 73 extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); 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 extern int irq_do_set_affinity(struct irq_data *data, 105 const struct cpumask *dest, bool force); 106 107 /* Inline functions for support of irq chips on slow busses */ 108 static inline void chip_bus_lock(struct irq_desc *desc) 109 { 110 if (unlikely(desc->irq_data.chip->irq_bus_lock)) 111 desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 112 } 113 114 static inline void chip_bus_sync_unlock(struct irq_desc *desc) 115 { 116 if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 117 desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 118 } 119 120 #define _IRQ_DESC_CHECK (1 << 0) 121 #define _IRQ_DESC_PERCPU (1 << 1) 122 123 #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) 124 #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) 125 126 struct irq_desc * 127 __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, 128 unsigned int check); 129 void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); 130 131 static inline struct irq_desc * 132 irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) 133 { 134 return __irq_get_desc_lock(irq, flags, true, check); 135 } 136 137 static inline void 138 irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) 139 { 140 __irq_put_desc_unlock(desc, flags, true); 141 } 142 143 static inline struct irq_desc * 144 irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) 145 { 146 return __irq_get_desc_lock(irq, flags, false, check); 147 } 148 149 static inline void 150 irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 151 { 152 __irq_put_desc_unlock(desc, flags, false); 153 } 154 155 /* 156 * Manipulation functions for irq_data.state 157 */ 158 static inline void irqd_set_move_pending(struct irq_data *d) 159 { 160 d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; 161 } 162 163 static inline void irqd_clr_move_pending(struct irq_data *d) 164 { 165 d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; 166 } 167 168 static inline void irqd_clear(struct irq_data *d, unsigned int mask) 169 { 170 d->state_use_accessors &= ~mask; 171 } 172 173 static inline void irqd_set(struct irq_data *d, unsigned int mask) 174 { 175 d->state_use_accessors |= mask; 176 } 177 178 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) 179 { 180 return d->state_use_accessors & mask; 181 } 182