internals.h revision a005677b3dd05decdd8880cf3044ae709856f58f
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * IRQ subsystem internal functions and variables: 3dbec07bac614a61e3392c1e7c08cc6a49ad43f7aThomas Gleixner * 4dbec07bac614a61e3392c1e7c08cc6a49ad43f7aThomas Gleixner * Do not ever include this file from anything else than 5dbec07bac614a61e3392c1e7c08cc6a49ad43f7aThomas Gleixner * kernel/irq/. Do not even think about using any information outside 6dbec07bac614a61e3392c1e7c08cc6a49ad43f7aThomas Gleixner * of this file for your non core code. 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixner#include <linux/irqdesc.h> 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner#ifdef CONFIG_SPARSE_IRQ 11c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner# define IRQ_BITMAP_BITS (NR_IRQS + 8196) 12c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner#else 13c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner# define IRQ_BITMAP_BITS NR_IRQS 14c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner#endif 15c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner 16dbec07bac614a61e3392c1e7c08cc6a49ad43f7aThomas Gleixner#define istate core_internal_state__do_not_mess_with_it 17dbec07bac614a61e3392c1e7c08cc6a49ad43f7aThomas Gleixner 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern int noirqdebug; 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner/* 211535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * Bits used by threaded handlers: 221535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 231535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_DIED - handler thread died 241535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed 251535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_AFFINITY - irq thread is requested to adjust affinity 261535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner */ 271535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixnerenum { 281535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_RUNTHREAD, 291535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_DIED, 301535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_WARNED, 311535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_AFFINITY, 321535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner}; 331535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner 34bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner/* 35bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner * Bit masks for desc->state 36bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner * 37bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner * IRQS_AUTODETECT - autodetection in progress 387acdd53e5b2c55b6f7e3427e85e2f91fa814a4f9Thomas Gleixner * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt 397acdd53e5b2c55b6f7e3427e85e2f91fa814a4f9Thomas Gleixner * detection 406954b75b488dd740950573f244ddd66fd28620aaThomas Gleixner * IRQS_POLL_INPROGRESS - polling in progress 41009b4c3b8ad584b3462734127a5bec680d5d6af4Thomas Gleixner * IRQS_INPROGRESS - Interrupt in progress 423d67baec7f1b01fc289ac1a2f1a7e6d5e43391c6Thomas Gleixner * IRQS_ONESHOT - irq is not unmasked in primary handler 43163ef3091195f514a06f064b12914597d2644c55Thomas Gleixner * IRQS_REPLAY - irq is replayed 44163ef3091195f514a06f064b12914597d2644c55Thomas Gleixner * IRQS_WAITING - irq is waiting 45c1594b77e46124bb462f961e536120e471c67446Thomas Gleixner * IRQS_DISABLED - irq is disabled 462a0d6fb335d4428285dab2d254911748e6040807Thomas Gleixner * IRQS_PENDING - irq is pending and replayed later 476e40262ea43c4b0e3f435b3a083e4461ef921c17Thomas Gleixner * IRQS_MASKED - irq is masked 48c531e8361f1968d664e6e97fbd3bfa4cf0e62e42Thomas Gleixner * IRQS_SUSPENDED - irq is suspended 496d2cd17fde1fc3e93302815f049f255bb2b3123eThomas Gleixner * IRQS_WAKEUP - irq triggers system wakeup from suspend 50bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner */ 51bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixnerenum { 52bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner IRQS_AUTODETECT = 0x00000001, 537acdd53e5b2c55b6f7e3427e85e2f91fa814a4f9Thomas Gleixner IRQS_SPURIOUS_DISABLED = 0x00000002, 546954b75b488dd740950573f244ddd66fd28620aaThomas Gleixner IRQS_POLL_INPROGRESS = 0x00000008, 55009b4c3b8ad584b3462734127a5bec680d5d6af4Thomas Gleixner IRQS_INPROGRESS = 0x00000010, 563d67baec7f1b01fc289ac1a2f1a7e6d5e43391c6Thomas Gleixner IRQS_ONESHOT = 0x00000020, 57163ef3091195f514a06f064b12914597d2644c55Thomas Gleixner IRQS_REPLAY = 0x00000040, 58163ef3091195f514a06f064b12914597d2644c55Thomas Gleixner IRQS_WAITING = 0x00000080, 59c1594b77e46124bb462f961e536120e471c67446Thomas Gleixner IRQS_DISABLED = 0x00000100, 602a0d6fb335d4428285dab2d254911748e6040807Thomas Gleixner IRQS_PENDING = 0x00000200, 616e40262ea43c4b0e3f435b3a083e4461ef921c17Thomas Gleixner IRQS_MASKED = 0x00000400, 62c531e8361f1968d664e6e97fbd3bfa4cf0e62e42Thomas Gleixner IRQS_SUSPENDED = 0x00000800, 636d2cd17fde1fc3e93302815f049f255bb2b3123eThomas Gleixner IRQS_WAKEUP = 0x00001000, 64bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner}; 65bd062e7667ac173afef57fbfe9327f3b914a9d4cThomas Gleixner 661ce6068dac1924f7095be5850481e790cbf1b3c1Thomas Gleixner#include "compat.h" 671ce6068dac1924f7095be5850481e790cbf1b3c1Thomas Gleixner#include "debug.h" 681ce6068dac1924f7095be5850481e790cbf1b3c1Thomas Gleixner#include "settings.h" 691ce6068dac1924f7095be5850481e790cbf1b3c1Thomas Gleixner 70a77c4635915021c646cc017f22239e66d1aab4d5Thomas Gleixner#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) 71a77c4635915021c646cc017f22239e66d1aab4d5Thomas Gleixner 726a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner/* Set default functions for irq_chip structures: */ 736a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixnerextern void irq_chip_set_defaults(struct irq_chip *chip); 746a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner 756a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner/* Set default handler: */ 766a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixnerextern void compat_irq_chip_set_default_handler(struct irq_desc *desc); 776a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner 780c5d1eb77a8be917b638344a22afe1398236482bDavid Brownellextern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 790c5d1eb77a8be917b638344a22afe1398236482bDavid Brownell unsigned long flags); 800a0c5168df270a50e3518e4f12bddb31f8f5f38fRafael J. Wysockiextern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); 810a0c5168df270a50e3518e4f12bddb31f8f5f38fRafael J. Wysockiextern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); 820c5d1eb77a8be917b638344a22afe1398236482bDavid Brownell 834699923861513671d3f6ade8efb4e56a9a7ecadfThomas Gleixnerextern int irq_startup(struct irq_desc *desc); 844699923861513671d3f6ade8efb4e56a9a7ecadfThomas Gleixnerextern void irq_shutdown(struct irq_desc *desc); 8587923470c712dff00b101ffb6b6fbc27bd7a6df5Thomas Gleixnerextern void irq_enable(struct irq_desc *desc); 8687923470c712dff00b101ffb6b6fbc27bd7a6df5Thomas Gleixnerextern void irq_disable(struct irq_desc *desc); 874699923861513671d3f6ade8efb4e56a9a7ecadfThomas Gleixner 8885ac16d033370caf6f48d743c8dc8103700f5cc5Yinghai Luextern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 890fa0ebbf15addc1be8f73325d809c8547a9de304Mike Travis 904912609f228da4a3d2bfbdf0f31de3d9eab2b7f8Thomas Gleixnerirqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); 914912609f228da4a3d2bfbdf0f31de3d9eab2b7f8Thomas Gleixnerirqreturn_t handle_irq_event(struct irq_desc *desc); 924912609f228da4a3d2bfbdf0f31de3d9eab2b7f8Thomas Gleixner 93e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixner/* Resending of interrupts :*/ 94e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixnervoid check_irq_resend(struct irq_desc *desc, unsigned int irq); 95fe200ae48ef5c79bf7941fe8046ff9505c570ff6Thomas Gleixnerbool irq_wait_for_poll(struct irq_desc *desc); 96e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixner 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PROC_FS 982c6927a38f65b53b62f86158fba29a068c4e8b6aYinghai Luextern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 9913bfe99e09123ef5edb6acb81ba337d2db600b53Thomas Gleixnerextern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern void register_handler_proc(unsigned int irq, struct irqaction *action); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 1032c6927a38f65b53b62f86158fba29a068c4e8b6aYinghai Lustatic inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 10413bfe99e09123ef5edb6acb81ba337d2db600b53Thomas Gleixnerstatic inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void register_handler_proc(unsigned int irq, 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct irqaction *action) { } 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void unregister_handler_proc(unsigned int irq, 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct irqaction *action) { } 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1113b8249e759c701c4a82f99d957be651a7657bf6fThomas Gleixnerextern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 112f6d87f4bd259cf33e092cd1a8fde05f291c47af1Thomas Gleixner 113591d2fb02ea80472d846c0b8507007806bdd69ccThomas Gleixnerextern void irq_set_thread_affinity(struct irq_desc *desc); 11457b150cce8e004ddd36330490a68bfb59b7271e9Yinghai Lu 11570aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner/* Inline functions for support of irq chips on slow busses */ 1163876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixnerstatic inline void chip_bus_lock(struct irq_desc *desc) 11770aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner{ 1183876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner if (unlikely(desc->irq_data.chip->irq_bus_lock)) 1193876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 12070aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner} 12170aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner 1223876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixnerstatic inline void chip_bus_sync_unlock(struct irq_desc *desc) 12370aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner{ 1243876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 1253876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 12670aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner} 12770aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner 12843f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar/* 129f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner * Manipulation functions for irq_data.state 130f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner */ 131f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixnerstatic inline void irqd_set_move_pending(struct irq_data *d) 132f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner{ 133f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; 134f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner irq_compat_set_move_pending(irq_data_to_desc(d)); 135f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner} 136f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner 137f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixnerstatic inline void irqd_clr_move_pending(struct irq_data *d) 138f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner{ 139f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; 140f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner irq_compat_clr_move_pending(irq_data_to_desc(d)); 141f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21Thomas Gleixner} 142a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner 143a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixnerstatic inline void irqd_clear(struct irq_data *d, unsigned int mask) 144a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner{ 145a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner d->state_use_accessors &= ~mask; 146a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner} 147a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner 148a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixnerstatic inline void irqd_set(struct irq_data *d, unsigned int mask) 149a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner{ 150a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner d->state_use_accessors |= mask; 151a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner} 152a005677b3dd05decdd8880cf3044ae709856f58fThomas Gleixner 153