internals.h revision 1535dfacbf21c4da1b73fcf07c39913da5bd5581
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * IRQ subsystem internal functions and variables: 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixner#include <linux/irqdesc.h> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner#ifdef CONFIG_SPARSE_IRQ 7c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner# define IRQ_BITMAP_BITS (NR_IRQS + 8196) 8c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner#else 9c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner# define IRQ_BITMAP_BITS NR_IRQS 10c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner#endif 11c1ee6264280e740a9d3ff3feef38642cf0a57013Thomas Gleixner 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern int noirqdebug; 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 141535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner/* 151535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * Bits used by threaded handlers: 161535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 171535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_DIED - handler thread died 181535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed 191535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner * IRQTF_AFFINITY - irq thread is requested to adjust affinity 201535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner */ 211535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixnerenum { 221535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_RUNTHREAD, 231535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_DIED, 241535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_WARNED, 251535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner IRQTF_AFFINITY, 261535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner}; 271535dfacbf21c4da1b73fcf07c39913da5bd5581Thomas Gleixner 28a77c4635915021c646cc017f22239e66d1aab4d5Thomas Gleixner#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) 29a77c4635915021c646cc017f22239e66d1aab4d5Thomas Gleixner 306a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner/* Set default functions for irq_chip structures: */ 316a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixnerextern void irq_chip_set_defaults(struct irq_chip *chip); 326a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner 336a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner/* Set default handler: */ 346a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixnerextern void compat_irq_chip_set_default_handler(struct irq_desc *desc); 356a6de9ef5850d063c3d3fb50784bfe3a6d0712c6Thomas Gleixner 360c5d1eb77a8be917b638344a22afe1398236482bDavid Brownellextern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 370c5d1eb77a8be917b638344a22afe1398236482bDavid Brownell unsigned long flags); 380a0c5168df270a50e3518e4f12bddb31f8f5f38fRafael J. Wysockiextern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); 390a0c5168df270a50e3518e4f12bddb31f8f5f38fRafael J. Wysockiextern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); 400c5d1eb77a8be917b638344a22afe1398236482bDavid Brownell 4185ac16d033370caf6f48d743c8dc8103700f5cc5Yinghai Luextern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 420fa0ebbf15addc1be8f73325d809c8547a9de304Mike Travis 43e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixner/* Resending of interrupts :*/ 44e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixnervoid check_irq_resend(struct irq_desc *desc, unsigned int irq); 45fe200ae48ef5c79bf7941fe8046ff9505c570ff6Thomas Gleixnerbool irq_wait_for_poll(struct irq_desc *desc); 46e144710b302525de5b90b9c3ba43562458d8957fThomas Gleixner 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_PROC_FS 482c6927a38f65b53b62f86158fba29a068c4e8b6aYinghai Luextern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 4913bfe99e09123ef5edb6acb81ba337d2db600b53Thomas Gleixnerextern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern void register_handler_proc(unsigned int irq, struct irqaction *action); 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 532c6927a38f65b53b62f86158fba29a068c4e8b6aYinghai Lustatic inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 5413bfe99e09123ef5edb6acb81ba337d2db600b53Thomas Gleixnerstatic inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void register_handler_proc(unsigned int irq, 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct irqaction *action) { } 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void unregister_handler_proc(unsigned int irq, 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct irqaction *action) { } 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 613b8249e759c701c4a82f99d957be651a7657bf6fThomas Gleixnerextern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 62f6d87f4bd259cf33e092cd1a8fde05f291c47af1Thomas Gleixner 63591d2fb02ea80472d846c0b8507007806bdd69ccThomas Gleixnerextern void irq_set_thread_affinity(struct irq_desc *desc); 6457b150cce8e004ddd36330490a68bfb59b7271e9Yinghai Lu 6570aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner/* Inline functions for support of irq chips on slow busses */ 663876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixnerstatic inline void chip_bus_lock(struct irq_desc *desc) 6770aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner{ 683876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner if (unlikely(desc->irq_data.chip->irq_bus_lock)) 693876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 7070aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner} 7170aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner 723876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixnerstatic inline void chip_bus_sync_unlock(struct irq_desc *desc) 7370aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner{ 743876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 753876ec9ef3775d062345b3760d3271ecb8cd3feaThomas Gleixner desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 7670aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner} 7770aedd24d20e75198f5a0b11750faabbb56924e2Thomas Gleixner 7843f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar/* 7943f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar * Debugging printout: 8043f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar */ 8143f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar 8243f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar#include <linux/kallsyms.h> 8343f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar 8443f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar#define P(f) if (desc->status & f) printk("%14s set\n", #f) 8543f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar 8643f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnarstatic inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) 8743f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar{ 8843f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n", 8943f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled); 9043f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar printk("->handle_irq(): %p, ", desc->handle_irq); 9143f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar print_symbol("%s\n", (unsigned long)desc->handle_irq); 926b8ff3120c758340505dddf08ad685ebb841d5d5Thomas Gleixner printk("->irq_data.chip(): %p, ", desc->irq_data.chip); 936b8ff3120c758340505dddf08ad685ebb841d5d5Thomas Gleixner print_symbol("%s\n", (unsigned long)desc->irq_data.chip); 9443f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar printk("->action(): %p\n", desc->action); 9543f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar if (desc->action) { 9643f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar printk("->action->handler(): %p, ", desc->action->handler); 9743f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar print_symbol("%s\n", (unsigned long)desc->action->handler); 9843f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar } 9943f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar 10043f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_INPROGRESS); 10143f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_DISABLED); 10243f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_PENDING); 10343f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_REPLAY); 10443f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_AUTODETECT); 10543f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_WAITING); 10643f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_LEVEL); 10743f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_MASKED); 10843f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar#ifdef CONFIG_IRQ_PER_CPU 10943f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_PER_CPU); 11043f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar#endif 11143f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_NOPROBE); 11243f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_NOREQUEST); 11343f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar P(IRQ_NOAUTOEN); 11443f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar} 11543f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar 11643f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar#undef P 11743f7775944e40221827e4b3aec43824aa4c4e4a9Ingo Molnar 118