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>
32 typedef void (*irq_flow_handler_t)(unsigned int irq,
33 struct irq_desc *desc);
39 * Bits 0-7 are reserved for the IRQF_* bits in linux/interrupt.h
43 #define IRQ_TYPE_NONE 0x00000000 /* Default, unspecified type */
44 #define IRQ_TYPE_EDGE_RISING 0x00000001 /* Edge rising type */
45 #define IRQ_TYPE_EDGE_FALLING 0x00000002 /* Edge falling type */
46 #define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)
47 #define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */
48 #define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */
49 #define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask of the above */
50 #define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */
53 #define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */
54 #define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */
55 #define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */
56 #define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */
57 #define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */
58 #define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */
59 #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */
60 #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */
61 #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */
62 #define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */
63 #define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */
64 #define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */
65 #define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */
66 #define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */
67 #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */
68 #define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */
69 #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */
70 #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/
71 #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */
72 #define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */
73 #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */
75 #define IRQF_MODIFY_MASK \
76 (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
77 IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL)
79 #ifdef CONFIG_IRQ_PER_CPU
80 # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
81 # define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
83 # define CHECK_IRQ_PER_CPU(var) 0
84 # define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING
91 * struct irq_data - per irq and irq chip data passed down to chip functions
92 * @irq: interrupt number
93 * @node: node index useful for balancing
94 * @chip: low level interrupt hardware access
95 * @handler_data: per-IRQ data for the irq_chip methods
96 * @chip_data: platform-specific per-chip private data for the chip
97 * methods, to allow shared chip implementations
98 * @msi_desc: MSI descriptor
99 * @affinity: IRQ affinity on SMP
100 * @irq_2_iommu: iommu with this irq
102 * The fields here need to overlay the ones in irq_desc until we
103 * cleaned up the direct references and switched everything over to
109 struct irq_chip *chip;
112 struct msi_desc *msi_desc;
114 cpumask_var_t affinity;
116 #ifdef CONFIG_INTR_REMAP
117 struct irq_2_iommu *irq_2_iommu;
122 * struct irq_chip - hardware interrupt chip descriptor
124 * @name: name for /proc/interrupts
125 * @startup: deprecated, replaced by irq_startup
126 * @shutdown: deprecated, replaced by irq_shutdown
127 * @enable: deprecated, replaced by irq_enable
128 * @disable: deprecated, replaced by irq_disable
129 * @ack: deprecated, replaced by irq_ack
130 * @mask: deprecated, replaced by irq_mask
131 * @mask_ack: deprecated, replaced by irq_mask_ack
132 * @unmask: deprecated, replaced by irq_unmask
133 * @eoi: deprecated, replaced by irq_eoi
134 * @end: deprecated, will go away with __do_IRQ()
135 * @set_affinity: deprecated, replaced by irq_set_affinity
136 * @retrigger: deprecated, replaced by irq_retrigger
137 * @set_type: deprecated, replaced by irq_set_type
138 * @set_wake: deprecated, replaced by irq_wake
139 * @bus_lock: deprecated, replaced by irq_bus_lock
140 * @bus_sync_unlock: deprecated, replaced by irq_bus_sync_unlock
142 * @irq_startup: start up the interrupt (defaults to ->enable if NULL)
143 * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
144 * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
145 * @irq_disable: disable the interrupt
146 * @irq_ack: start of a new interrupt
147 * @irq_mask: mask an interrupt source
148 * @irq_mask_ack: ack and mask an interrupt source
149 * @irq_unmask: unmask an interrupt source
150 * @irq_eoi: end of interrupt
151 * @irq_set_affinity: set the CPU affinity on SMP machines
152 * @irq_retrigger: resend an IRQ to the CPU
153 * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
154 * @irq_set_wake: enable/disable power-management wake-on of an IRQ
155 * @irq_bus_lock: function to lock access to slow bus (i2c) chips
156 * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
158 * @release: release function solely used by UML
162 #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
163 unsigned int (*startup)(unsigned int irq);
164 void (*shutdown)(unsigned int irq);
165 void (*enable)(unsigned int irq);
166 void (*disable)(unsigned int irq);
168 void (*ack)(unsigned int irq);
169 void (*mask)(unsigned int irq);
170 void (*mask_ack)(unsigned int irq);
171 void (*unmask)(unsigned int irq);
172 void (*eoi)(unsigned int irq);
174 void (*end)(unsigned int irq);
175 int (*set_affinity)(unsigned int irq,
176 const struct cpumask *dest);
177 int (*retrigger)(unsigned int irq);
178 int (*set_type)(unsigned int irq, unsigned int flow_type);
179 int (*set_wake)(unsigned int irq, unsigned int on);
181 void (*bus_lock)(unsigned int irq);
182 void (*bus_sync_unlock)(unsigned int irq);
184 unsigned int (*irq_startup)(struct irq_data *data);
185 void (*irq_shutdown)(struct irq_data *data);
186 void (*irq_enable)(struct irq_data *data);
187 void (*irq_disable)(struct irq_data *data);
189 void (*irq_ack)(struct irq_data *data);
190 void (*irq_mask)(struct irq_data *data);
191 void (*irq_mask_ack)(struct irq_data *data);
192 void (*irq_unmask)(struct irq_data *data);
193 void (*irq_eoi)(struct irq_data *data);
195 int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
196 int (*irq_retrigger)(struct irq_data *data);
197 int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
198 int (*irq_set_wake)(struct irq_data *data, unsigned int on);
200 void (*irq_bus_lock)(struct irq_data *data);
201 void (*irq_bus_sync_unlock)(struct irq_data *data);
203 /* Currently used only by UML, might disappear one day.*/
204 #ifdef CONFIG_IRQ_RELEASE_METHOD
205 void (*release)(unsigned int irq, void *dev_id);
209 /* This include will go away once we isolated irq_desc usage to core code */
210 #include <linux/irqdesc.h>
213 * Pick up the arch-dependent methods:
215 #include <asm/hw_irq.h>
218 extern int setup_irq(unsigned int irq, struct irqaction *new);
219 extern void remove_irq(unsigned int irq, struct irqaction *act);
221 #ifdef CONFIG_GENERIC_HARDIRQS
223 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
224 void move_native_irq(int irq);
225 void move_masked_irq(int irq);
227 static inline void move_native_irq(int irq) { }
228 static inline void move_masked_irq(int irq) { }
231 extern int no_irq_affinity;
233 /* Handle irq action chains: */
234 extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
237 * Built-in IRQ handlers for various IRQ types,
238 * callable via desc->handle_irq()
240 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
241 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
242 extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
243 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
244 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
245 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
246 extern void handle_nested_irq(unsigned int irq);
248 /* Handling of unhandled and spurious interrupts: */
249 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
250 irqreturn_t action_ret);
253 /* Enable/disable irq debugging output: */
254 extern int noirqdebug_setup(char *str);
256 /* Checks whether the interrupt can be requested by request_irq(): */
257 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
259 /* Dummy irq-chip implementations: */
260 extern struct irq_chip no_irq_chip;
261 extern struct irq_chip dummy_irq_chip;
264 set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
265 irq_flow_handler_t handle);
267 set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
268 irq_flow_handler_t handle, const char *name);
271 __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
275 * Set a highlevel flow handler for a given IRQ:
278 set_irq_handler(unsigned int irq, irq_flow_handler_t handle)
280 __set_irq_handler(irq, handle, 0, NULL);
284 * Set a highlevel chained flow handler for a given IRQ.
285 * (a chained handler is automatically enabled and set to
286 * IRQ_NOREQUEST and IRQ_NOPROBE)
289 set_irq_chained_handler(unsigned int irq,
290 irq_flow_handler_t handle)
292 __set_irq_handler(irq, handle, 1, NULL);
295 extern void set_irq_nested_thread(unsigned int irq, int nest);
297 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
299 static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
301 irq_modify_status(irq, 0, set);
304 static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
306 irq_modify_status(irq, clr, 0);
309 static inline void set_irq_noprobe(unsigned int irq)
311 irq_modify_status(irq, 0, IRQ_NOPROBE);
314 static inline void set_irq_probe(unsigned int irq)
316 irq_modify_status(irq, IRQ_NOPROBE, 0);
319 /* Handle dynamic irq creation and destruction */
320 extern unsigned int create_irq_nr(unsigned int irq_want, int node);
321 extern int create_irq(void);
322 extern void destroy_irq(unsigned int irq);
324 /* Dynamic irq helper functions */
325 extern void dynamic_irq_init(unsigned int irq);
326 void dynamic_irq_init_keep_chip_data(unsigned int irq);
327 extern void dynamic_irq_cleanup(unsigned int irq);
328 void dynamic_irq_cleanup_keep_chip_data(unsigned int irq);
330 /* Set/get chip/data for an IRQ: */
331 extern int set_irq_chip(unsigned int irq, struct irq_chip *chip);
332 extern int set_irq_data(unsigned int irq, void *data);
333 extern int set_irq_chip_data(unsigned int irq, void *data);
334 extern int set_irq_type(unsigned int irq, unsigned int type);
335 extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
336 extern struct irq_data *irq_get_irq_data(unsigned int irq);
338 static inline struct irq_chip *get_irq_chip(unsigned int irq)
340 struct irq_data *d = irq_get_irq_data(irq);
341 return d ? d->chip : NULL;
344 static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
349 static inline void *get_irq_chip_data(unsigned int irq)
351 struct irq_data *d = irq_get_irq_data(irq);
352 return d ? d->chip_data : NULL;
355 static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
360 static inline void *get_irq_data(unsigned int irq)
362 struct irq_data *d = irq_get_irq_data(irq);
363 return d ? d->handler_data : NULL;
366 static inline void *irq_data_get_irq_data(struct irq_data *d)
368 return d->handler_data;
371 static inline struct msi_desc *get_irq_msi(unsigned int irq)
373 struct irq_data *d = irq_get_irq_data(irq);
374 return d ? d->msi_desc : NULL;
377 static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
382 #ifdef CONFIG_INTR_REMAP
383 static inline struct irq_2_iommu *get_irq_iommu(unsigned int irq)
385 struct irq_data *d = irq_get_irq_data(irq);
386 return d ? d->irq_2_iommu : NULL;
389 static inline struct irq_2_iommu *irq_data_get_iommu(struct irq_data *d)
391 return d->irq_2_iommu;
395 #endif /* CONFIG_GENERIC_HARDIRQS */
397 #endif /* !CONFIG_S390 */
399 #endif /* _LINUX_IRQ_H */