5 * Please do not include this file in generic code. There is currently
6 * no requirement for any architecture to implement anything held
12 #include <linux/smp.h>
16 #include <linux/linkage.h>
17 #include <linux/cache.h>
18 #include <linux/spinlock.h>
19 #include <linux/cpumask.h>
20 #include <linux/gfp.h>
21 #include <linux/irqreturn.h>
22 #include <linux/irqnr.h>
23 #include <linux/errno.h>
24 #include <linux/topology.h>
25 #include <linux/wait.h>
28 #include <asm/ptrace.h>
29 #include <asm/irq_regs.h>
35 typedef void (*irq_flow_handler_t)(unsigned int irq,
36 struct irq_desc *desc);
37 typedef void (*irq_preflow_handler_t)(struct irq_data *data);
42 * Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
44 * IRQ_TYPE_NONE - default, unspecified type
45 * IRQ_TYPE_EDGE_RISING - rising edge triggered
46 * IRQ_TYPE_EDGE_FALLING - falling edge triggered
47 * IRQ_TYPE_EDGE_BOTH - rising and falling edge triggered
48 * IRQ_TYPE_LEVEL_HIGH - high level triggered
49 * IRQ_TYPE_LEVEL_LOW - low level triggered
50 * IRQ_TYPE_LEVEL_MASK - Mask to filter out the level bits
51 * IRQ_TYPE_SENSE_MASK - Mask for all the above bits
52 * IRQ_TYPE_DEFAULT - For use by some PICs to ask irq_set_type
53 * to setup the HW to a sane default (used
54 * by irqdomain map() callbacks to synchronize
55 * the HW state and SW flags for a newly
56 * allocated descriptor).
58 * IRQ_TYPE_PROBE - Special flag for probing in progress
60 * Bits which can be modified via irq_set/clear/modify_status_flags()
61 * IRQ_LEVEL - Interrupt is level type. Will be also
62 * updated in the code when the above trigger
63 * bits are modified via irq_set_irq_type()
64 * IRQ_PER_CPU - Mark an interrupt PER_CPU. Will protect
65 * it from affinity setting
66 * IRQ_NOPROBE - Interrupt cannot be probed by autoprobing
67 * IRQ_NOREQUEST - Interrupt cannot be requested via
69 * IRQ_NOTHREAD - Interrupt cannot be threaded
70 * IRQ_NOAUTOEN - Interrupt is not automatically enabled in
72 * IRQ_NO_BALANCING - Interrupt cannot be balanced (affinity set)
73 * IRQ_MOVE_PCNTXT - Interrupt can be migrated from process context
74 * IRQ_NESTED_TRHEAD - Interrupt nests into another thread
75 * IRQ_PER_CPU_DEVID - Dev_id is a per-cpu variable
78 IRQ_TYPE_NONE = 0x00000000,
79 IRQ_TYPE_EDGE_RISING = 0x00000001,
80 IRQ_TYPE_EDGE_FALLING = 0x00000002,
81 IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
82 IRQ_TYPE_LEVEL_HIGH = 0x00000004,
83 IRQ_TYPE_LEVEL_LOW = 0x00000008,
84 IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),
85 IRQ_TYPE_SENSE_MASK = 0x0000000f,
86 IRQ_TYPE_DEFAULT = IRQ_TYPE_SENSE_MASK,
88 IRQ_TYPE_PROBE = 0x00000010,
91 IRQ_PER_CPU = (1 << 9),
92 IRQ_NOPROBE = (1 << 10),
93 IRQ_NOREQUEST = (1 << 11),
94 IRQ_NOAUTOEN = (1 << 12),
95 IRQ_NO_BALANCING = (1 << 13),
96 IRQ_MOVE_PCNTXT = (1 << 14),
97 IRQ_NESTED_THREAD = (1 << 15),
98 IRQ_NOTHREAD = (1 << 16),
99 IRQ_PER_CPU_DEVID = (1 << 17),
102 #define IRQF_MODIFY_MASK \
103 (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
104 IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
105 IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID)
107 #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
110 * Return value for chip->irq_set_affinity()
112 * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity
113 * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity
117 IRQ_SET_MASK_OK_NOCOPY,
124 * struct irq_data - per irq and irq chip data passed down to chip functions
125 * @irq: interrupt number
126 * @hwirq: hardware interrupt number, local to the interrupt domain
127 * @node: node index useful for balancing
128 * @state_use_accessors: status information for irq chip functions.
129 * Use accessor functions to deal with it
130 * @chip: low level interrupt hardware access
131 * @domain: Interrupt translation domain; responsible for mapping
132 * between hwirq number and linux irq number.
133 * @handler_data: per-IRQ data for the irq_chip methods
134 * @chip_data: platform-specific per-chip private data for the chip
135 * methods, to allow shared chip implementations
136 * @msi_desc: MSI descriptor
137 * @affinity: IRQ affinity on SMP
139 * The fields here need to overlay the ones in irq_desc until we
140 * cleaned up the direct references and switched everything over to
147 unsigned int state_use_accessors;
148 struct irq_chip *chip;
149 struct irq_domain *domain;
152 struct msi_desc *msi_desc;
153 cpumask_var_t affinity;
157 * Bit masks for irq_data.state
159 * IRQD_TRIGGER_MASK - Mask for the trigger type bits
160 * IRQD_SETAFFINITY_PENDING - Affinity setting is pending
161 * IRQD_NO_BALANCING - Balancing disabled for this IRQ
162 * IRQD_PER_CPU - Interrupt is per cpu
163 * IRQD_AFFINITY_SET - Interrupt affinity was set
164 * IRQD_LEVEL - Interrupt is level triggered
165 * IRQD_WAKEUP_STATE - Interrupt is configured for wakeup
167 * IRDQ_MOVE_PCNTXT - Interrupt can be moved in process
169 * IRQD_IRQ_DISABLED - Disabled state of the interrupt
170 * IRQD_IRQ_MASKED - Masked state of the interrupt
171 * IRQD_IRQ_INPROGRESS - In progress state of the interrupt
174 IRQD_TRIGGER_MASK = 0xf,
175 IRQD_SETAFFINITY_PENDING = (1 << 8),
176 IRQD_NO_BALANCING = (1 << 10),
177 IRQD_PER_CPU = (1 << 11),
178 IRQD_AFFINITY_SET = (1 << 12),
179 IRQD_LEVEL = (1 << 13),
180 IRQD_WAKEUP_STATE = (1 << 14),
181 IRQD_MOVE_PCNTXT = (1 << 15),
182 IRQD_IRQ_DISABLED = (1 << 16),
183 IRQD_IRQ_MASKED = (1 << 17),
184 IRQD_IRQ_INPROGRESS = (1 << 18),
187 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
189 return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
192 static inline bool irqd_is_per_cpu(struct irq_data *d)
194 return d->state_use_accessors & IRQD_PER_CPU;
197 static inline bool irqd_can_balance(struct irq_data *d)
199 return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
202 static inline bool irqd_affinity_was_set(struct irq_data *d)
204 return d->state_use_accessors & IRQD_AFFINITY_SET;
207 static inline void irqd_mark_affinity_was_set(struct irq_data *d)
209 d->state_use_accessors |= IRQD_AFFINITY_SET;
212 static inline u32 irqd_get_trigger_type(struct irq_data *d)
214 return d->state_use_accessors & IRQD_TRIGGER_MASK;
218 * Must only be called inside irq_chip.irq_set_type() functions.
220 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
222 d->state_use_accessors &= ~IRQD_TRIGGER_MASK;
223 d->state_use_accessors |= type & IRQD_TRIGGER_MASK;
226 static inline bool irqd_is_level_type(struct irq_data *d)
228 return d->state_use_accessors & IRQD_LEVEL;
231 static inline bool irqd_is_wakeup_set(struct irq_data *d)
233 return d->state_use_accessors & IRQD_WAKEUP_STATE;
236 static inline bool irqd_can_move_in_process_context(struct irq_data *d)
238 return d->state_use_accessors & IRQD_MOVE_PCNTXT;
241 static inline bool irqd_irq_disabled(struct irq_data *d)
243 return d->state_use_accessors & IRQD_IRQ_DISABLED;
246 static inline bool irqd_irq_masked(struct irq_data *d)
248 return d->state_use_accessors & IRQD_IRQ_MASKED;
251 static inline bool irqd_irq_inprogress(struct irq_data *d)
253 return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
257 * Functions for chained handlers which can be enabled/disabled by the
258 * standard disable_irq/enable_irq calls. Must be called with
259 * irq_desc->lock held.
261 static inline void irqd_set_chained_irq_inprogress(struct irq_data *d)
263 d->state_use_accessors |= IRQD_IRQ_INPROGRESS;
266 static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
268 d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;
271 static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
277 * struct irq_chip - hardware interrupt chip descriptor
279 * @name: name for /proc/interrupts
280 * @irq_startup: start up the interrupt (defaults to ->enable if NULL)
281 * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
282 * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
283 * @irq_disable: disable the interrupt
284 * @irq_ack: start of a new interrupt
285 * @irq_mask: mask an interrupt source
286 * @irq_mask_ack: ack and mask an interrupt source
287 * @irq_unmask: unmask an interrupt source
288 * @irq_eoi: end of interrupt
289 * @irq_set_affinity: set the CPU affinity on SMP machines
290 * @irq_retrigger: resend an IRQ to the CPU
291 * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
292 * @irq_set_wake: enable/disable power-management wake-on of an IRQ
293 * @irq_bus_lock: function to lock access to slow bus (i2c) chips
294 * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
295 * @irq_cpu_online: configure an interrupt source for a secondary CPU
296 * @irq_cpu_offline: un-configure an interrupt source for a secondary CPU
297 * @irq_suspend: function called from core code on suspend once per chip
298 * @irq_resume: function called from core code on resume once per chip
299 * @irq_pm_shutdown: function called from core code on shutdown once per chip
300 * @irq_print_chip: optional to print special chip info in show_interrupts
301 * @flags: chip specific flags
305 unsigned int (*irq_startup)(struct irq_data *data);
306 void (*irq_shutdown)(struct irq_data *data);
307 void (*irq_enable)(struct irq_data *data);
308 void (*irq_disable)(struct irq_data *data);
310 void (*irq_ack)(struct irq_data *data);
311 void (*irq_mask)(struct irq_data *data);
312 void (*irq_mask_ack)(struct irq_data *data);
313 void (*irq_unmask)(struct irq_data *data);
314 void (*irq_eoi)(struct irq_data *data);
316 int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
317 int (*irq_retrigger)(struct irq_data *data);
318 int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
319 int (*irq_set_wake)(struct irq_data *data, unsigned int on);
321 void (*irq_bus_lock)(struct irq_data *data);
322 void (*irq_bus_sync_unlock)(struct irq_data *data);
324 void (*irq_cpu_online)(struct irq_data *data);
325 void (*irq_cpu_offline)(struct irq_data *data);
327 void (*irq_suspend)(struct irq_data *data);
328 void (*irq_resume)(struct irq_data *data);
329 void (*irq_pm_shutdown)(struct irq_data *data);
331 void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
337 * irq_chip specific flags
339 * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
340 * IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
341 * IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
342 * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
344 * IRQCHIP_SKIP_SET_WAKE: Skip chip.irq_set_wake(), for this irq chip
347 IRQCHIP_SET_TYPE_MASKED = (1 << 0),
348 IRQCHIP_EOI_IF_HANDLED = (1 << 1),
349 IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
350 IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
351 IRQCHIP_SKIP_SET_WAKE = (1 << 4),
352 IRQCHIP_ONESHOT_SAFE = (1 << 5),
355 /* This include will go away once we isolated irq_desc usage to core code */
356 #include <linux/irqdesc.h>
359 * Pick up the arch-dependent methods:
361 #include <asm/hw_irq.h>
363 #ifndef NR_IRQS_LEGACY
364 # define NR_IRQS_LEGACY 0
367 #ifndef ARCH_IRQ_INIT_FLAGS
368 # define ARCH_IRQ_INIT_FLAGS 0
371 #define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
374 extern int setup_irq(unsigned int irq, struct irqaction *new);
375 extern void remove_irq(unsigned int irq, struct irqaction *act);
376 extern int setup_percpu_irq(unsigned int irq, struct irqaction *new);
377 extern void remove_percpu_irq(unsigned int irq, struct irqaction *act);
379 extern void irq_cpu_online(void);
380 extern void irq_cpu_offline(void);
381 extern int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *cpumask);
383 #ifdef CONFIG_GENERIC_HARDIRQS
385 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
386 void irq_move_irq(struct irq_data *data);
387 void irq_move_masked_irq(struct irq_data *data);
389 static inline void irq_move_irq(struct irq_data *data) { }
390 static inline void irq_move_masked_irq(struct irq_data *data) { }
393 extern int no_irq_affinity;
396 * Built-in IRQ handlers for various IRQ types,
397 * callable via desc->handle_irq()
399 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
400 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
401 extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
402 extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc);
403 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
404 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
405 extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc);
406 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
407 extern void handle_nested_irq(unsigned int irq);
409 /* Handling of unhandled and spurious interrupts: */
410 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
411 irqreturn_t action_ret);
414 /* Enable/disable irq debugging output: */
415 extern int noirqdebug_setup(char *str);
417 /* Checks whether the interrupt can be requested by request_irq(): */
418 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
420 /* Dummy irq-chip implementations: */
421 extern struct irq_chip no_irq_chip;
422 extern struct irq_chip dummy_irq_chip;
425 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
426 irq_flow_handler_t handle, const char *name);
428 static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip,
429 irq_flow_handler_t handle)
431 irq_set_chip_and_handler_name(irq, chip, handle, NULL);
434 extern int irq_set_percpu_devid(unsigned int irq);
437 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
441 irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
443 __irq_set_handler(irq, handle, 0, NULL);
447 * Set a highlevel chained flow handler for a given IRQ.
448 * (a chained handler is automatically enabled and set to
449 * IRQ_NOREQUEST, IRQ_NOPROBE, and IRQ_NOTHREAD)
452 irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
454 __irq_set_handler(irq, handle, 1, NULL);
457 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
459 static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
461 irq_modify_status(irq, 0, set);
464 static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
466 irq_modify_status(irq, clr, 0);
469 static inline void irq_set_noprobe(unsigned int irq)
471 irq_modify_status(irq, 0, IRQ_NOPROBE);
474 static inline void irq_set_probe(unsigned int irq)
476 irq_modify_status(irq, IRQ_NOPROBE, 0);
479 static inline void irq_set_nothread(unsigned int irq)
481 irq_modify_status(irq, 0, IRQ_NOTHREAD);
484 static inline void irq_set_thread(unsigned int irq)
486 irq_modify_status(irq, IRQ_NOTHREAD, 0);
489 static inline void irq_set_nested_thread(unsigned int irq, bool nest)
492 irq_set_status_flags(irq, IRQ_NESTED_THREAD);
494 irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
497 static inline void irq_set_percpu_devid_flags(unsigned int irq)
499 irq_set_status_flags(irq,
500 IRQ_NOAUTOEN | IRQ_PER_CPU | IRQ_NOTHREAD |
501 IRQ_NOPROBE | IRQ_PER_CPU_DEVID);
504 /* Handle dynamic irq creation and destruction */
505 extern unsigned int create_irq_nr(unsigned int irq_want, int node);
506 extern int create_irq(void);
507 extern void destroy_irq(unsigned int irq);
510 * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
511 * irq_free_desc instead.
513 extern void dynamic_irq_cleanup(unsigned int irq);
514 static inline void dynamic_irq_init(unsigned int irq)
516 dynamic_irq_cleanup(irq);
519 /* Set/get chip/data for an IRQ: */
520 extern int irq_set_chip(unsigned int irq, struct irq_chip *chip);
521 extern int irq_set_handler_data(unsigned int irq, void *data);
522 extern int irq_set_chip_data(unsigned int irq, void *data);
523 extern int irq_set_irq_type(unsigned int irq, unsigned int type);
524 extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
525 extern struct irq_data *irq_get_irq_data(unsigned int irq);
527 static inline struct irq_chip *irq_get_chip(unsigned int irq)
529 struct irq_data *d = irq_get_irq_data(irq);
530 return d ? d->chip : NULL;
533 static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
538 static inline void *irq_get_chip_data(unsigned int irq)
540 struct irq_data *d = irq_get_irq_data(irq);
541 return d ? d->chip_data : NULL;
544 static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
549 static inline void *irq_get_handler_data(unsigned int irq)
551 struct irq_data *d = irq_get_irq_data(irq);
552 return d ? d->handler_data : NULL;
555 static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
557 return d->handler_data;
560 static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
562 struct irq_data *d = irq_get_irq_data(irq);
563 return d ? d->msi_desc : NULL;
566 static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
571 int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
572 struct module *owner);
574 /* use macros to avoid needing export.h for THIS_MODULE */
575 #define irq_alloc_descs(irq, from, cnt, node) \
576 __irq_alloc_descs(irq, from, cnt, node, THIS_MODULE)
578 #define irq_alloc_desc(node) \
579 irq_alloc_descs(-1, 0, 1, node)
581 #define irq_alloc_desc_at(at, node) \
582 irq_alloc_descs(at, at, 1, node)
584 #define irq_alloc_desc_from(from, node) \
585 irq_alloc_descs(-1, from, 1, node)
587 void irq_free_descs(unsigned int irq, unsigned int cnt);
588 int irq_reserve_irqs(unsigned int from, unsigned int cnt);
590 static inline void irq_free_desc(unsigned int irq)
592 irq_free_descs(irq, 1);
595 static inline int irq_reserve_irq(unsigned int irq)
597 return irq_reserve_irqs(irq, 1);
600 #ifndef irq_reg_writel
601 # define irq_reg_writel(val, addr) writel(val, addr)
603 #ifndef irq_reg_readl
604 # define irq_reg_readl(addr) readl(addr)
608 * struct irq_chip_regs - register offsets for struct irq_gci
609 * @enable: Enable register offset to reg_base
610 * @disable: Disable register offset to reg_base
611 * @mask: Mask register offset to reg_base
612 * @ack: Ack register offset to reg_base
613 * @eoi: Eoi register offset to reg_base
614 * @type: Type configuration register offset to reg_base
615 * @polarity: Polarity configuration register offset to reg_base
617 struct irq_chip_regs {
618 unsigned long enable;
619 unsigned long disable;
624 unsigned long polarity;
628 * struct irq_chip_type - Generic interrupt chip instance for a flow type
629 * @chip: The real interrupt chip which provides the callbacks
630 * @regs: Register offsets for this chip
631 * @handler: Flow handler associated with this chip
632 * @type: Chip can handle these flow types
634 * A irq_generic_chip can have several instances of irq_chip_type when
635 * it requires different functions and register offsets for different
638 struct irq_chip_type {
639 struct irq_chip chip;
640 struct irq_chip_regs regs;
641 irq_flow_handler_t handler;
646 * struct irq_chip_generic - Generic irq chip data structure
647 * @lock: Lock to protect register and cache data access
648 * @reg_base: Register base address (virtual)
649 * @irq_base: Interrupt base nr for this chip
650 * @irq_cnt: Number of interrupts handled by this chip
651 * @mask_cache: Cached mask register
652 * @type_cache: Cached type register
653 * @polarity_cache: Cached polarity register
654 * @wake_enabled: Interrupt can wakeup from suspend
655 * @wake_active: Interrupt is marked as an wakeup from suspend source
656 * @num_ct: Number of available irq_chip_type instances (usually 1)
657 * @private: Private data for non generic chip callbacks
658 * @list: List head for keeping track of instances
659 * @chip_types: Array of interrupt irq_chip_types
661 * Note, that irq_chip_generic can have multiple irq_chip_type
662 * implementations which can be associated to a particular irq line of
663 * an irq_chip_generic instance. That allows to share and protect
664 * state in an irq_chip_generic instance when we need to implement
665 * different flow mechanisms (level/edge) for it.
667 struct irq_chip_generic {
669 void __iomem *reg_base;
670 unsigned int irq_base;
671 unsigned int irq_cnt;
679 struct list_head list;
680 struct irq_chip_type chip_types[0];
684 * enum irq_gc_flags - Initialization flags for generic irq chips
685 * @IRQ_GC_INIT_MASK_CACHE: Initialize the mask_cache by reading mask reg
686 * @IRQ_GC_INIT_NESTED_LOCK: Set the lock class of the irqs to nested for
687 * irq chips which need to call irq_set_wake() on
688 * the parent irq. Usually GPIO implementations
691 IRQ_GC_INIT_MASK_CACHE = 1 << 0,
692 IRQ_GC_INIT_NESTED_LOCK = 1 << 1,
695 /* Generic chip callback functions */
696 void irq_gc_noop(struct irq_data *d);
697 void irq_gc_mask_disable_reg(struct irq_data *d);
698 void irq_gc_mask_set_bit(struct irq_data *d);
699 void irq_gc_mask_clr_bit(struct irq_data *d);
700 void irq_gc_unmask_enable_reg(struct irq_data *d);
701 void irq_gc_ack_set_bit(struct irq_data *d);
702 void irq_gc_ack_clr_bit(struct irq_data *d);
703 void irq_gc_mask_disable_reg_and_ack(struct irq_data *d);
704 void irq_gc_eoi(struct irq_data *d);
705 int irq_gc_set_wake(struct irq_data *d, unsigned int on);
707 /* Setup functions for irq_chip_generic */
708 struct irq_chip_generic *
709 irq_alloc_generic_chip(const char *name, int nr_ct, unsigned int irq_base,
710 void __iomem *reg_base, irq_flow_handler_t handler);
711 void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
712 enum irq_gc_flags flags, unsigned int clr,
714 int irq_setup_alt_chip(struct irq_data *d, unsigned int type);
715 void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
716 unsigned int clr, unsigned int set);
718 static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d)
720 return container_of(d->chip, struct irq_chip_type, chip);
723 #define IRQ_MSK(n) (u32)((n) < 32 ? ((1 << (n)) - 1) : UINT_MAX)
726 static inline void irq_gc_lock(struct irq_chip_generic *gc)
728 raw_spin_lock(&gc->lock);
731 static inline void irq_gc_unlock(struct irq_chip_generic *gc)
733 raw_spin_unlock(&gc->lock);
736 static inline void irq_gc_lock(struct irq_chip_generic *gc) { }
737 static inline void irq_gc_unlock(struct irq_chip_generic *gc) { }
740 #endif /* CONFIG_GENERIC_HARDIRQS */
742 #endif /* !CONFIG_S390 */
744 #endif /* _LINUX_IRQ_H */