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 #ifdef CONFIG_IRQ_PER_CPU
76 # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
77 # define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
79 # define CHECK_IRQ_PER_CPU(var) 0
80 # define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING
86 * struct irq_data - per irq and irq chip data passed down to chip functions
87 * @irq: interrupt number
88 * @node: node index useful for balancing
89 * @chip: low level interrupt hardware access
90 * @handler_data: per-IRQ data for the irq_chip methods
91 * @chip_data: platform-specific per-chip private data for the chip
92 * methods, to allow shared chip implementations
93 * @msi_desc: MSI descriptor
94 * @affinity: IRQ affinity on SMP
95 * @irq_2_iommu: iommu with this irq
97 * The fields here need to overlay the ones in irq_desc until we
98 * cleaned up the direct references and switched everything over to
104 struct irq_chip *chip;
107 struct msi_desc *msi_desc;
109 cpumask_var_t affinity;
111 #ifdef CONFIG_INTR_REMAP
112 struct irq_2_iommu *irq_2_iommu;
117 * struct irq_chip - hardware interrupt chip descriptor
119 * @name: name for /proc/interrupts
120 * @startup: deprecated, replaced by irq_startup
121 * @shutdown: deprecated, replaced by irq_shutdown
122 * @enable: deprecated, replaced by irq_enable
123 * @disable: deprecated, replaced by irq_disable
124 * @ack: deprecated, replaced by irq_ack
125 * @mask: deprecated, replaced by irq_mask
126 * @mask_ack: deprecated, replaced by irq_mask_ack
127 * @unmask: deprecated, replaced by irq_unmask
128 * @eoi: deprecated, replaced by irq_eoi
129 * @end: deprecated, will go away with __do_IRQ()
130 * @set_affinity: deprecated, replaced by irq_set_affinity
131 * @retrigger: deprecated, replaced by irq_retrigger
132 * @set_type: deprecated, replaced by irq_set_type
133 * @set_wake: deprecated, replaced by irq_wake
134 * @bus_lock: deprecated, replaced by irq_bus_lock
135 * @bus_sync_unlock: deprecated, replaced by irq_bus_sync_unlock
137 * @irq_startup: start up the interrupt (defaults to ->enable if NULL)
138 * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
139 * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
140 * @irq_disable: disable the interrupt
141 * @irq_ack: start of a new interrupt
142 * @irq_mask: mask an interrupt source
143 * @irq_mask_ack: ack and mask an interrupt source
144 * @irq_unmask: unmask an interrupt source
145 * @irq_eoi: end of interrupt
146 * @irq_set_affinity: set the CPU affinity on SMP machines
147 * @irq_retrigger: resend an IRQ to the CPU
148 * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
149 * @irq_set_wake: enable/disable power-management wake-on of an IRQ
150 * @irq_bus_lock: function to lock access to slow bus (i2c) chips
151 * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
153 * @release: release function solely used by UML
157 #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
158 unsigned int (*startup)(unsigned int irq);
159 void (*shutdown)(unsigned int irq);
160 void (*enable)(unsigned int irq);
161 void (*disable)(unsigned int irq);
163 void (*ack)(unsigned int irq);
164 void (*mask)(unsigned int irq);
165 void (*mask_ack)(unsigned int irq);
166 void (*unmask)(unsigned int irq);
167 void (*eoi)(unsigned int irq);
169 void (*end)(unsigned int irq);
170 int (*set_affinity)(unsigned int irq,
171 const struct cpumask *dest);
172 int (*retrigger)(unsigned int irq);
173 int (*set_type)(unsigned int irq, unsigned int flow_type);
174 int (*set_wake)(unsigned int irq, unsigned int on);
176 void (*bus_lock)(unsigned int irq);
177 void (*bus_sync_unlock)(unsigned int irq);
179 unsigned int (*irq_startup)(struct irq_data *data);
180 void (*irq_shutdown)(struct irq_data *data);
181 void (*irq_enable)(struct irq_data *data);
182 void (*irq_disable)(struct irq_data *data);
184 void (*irq_ack)(struct irq_data *data);
185 void (*irq_mask)(struct irq_data *data);
186 void (*irq_mask_ack)(struct irq_data *data);
187 void (*irq_unmask)(struct irq_data *data);
188 void (*irq_eoi)(struct irq_data *data);
190 int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
191 int (*irq_retrigger)(struct irq_data *data);
192 int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
193 int (*irq_set_wake)(struct irq_data *data, unsigned int on);
195 void (*irq_bus_lock)(struct irq_data *data);
196 void (*irq_bus_sync_unlock)(struct irq_data *data);
198 /* Currently used only by UML, might disappear one day.*/
199 #ifdef CONFIG_IRQ_RELEASE_METHOD
200 void (*release)(unsigned int irq, void *dev_id);
204 /* This include will go away once we isolated irq_desc usage to core code */
205 #include <linux/irqdesc.h>
208 * Pick up the arch-dependent methods:
210 #include <asm/hw_irq.h>
213 extern int setup_irq(unsigned int irq, struct irqaction *new);
214 extern void remove_irq(unsigned int irq, struct irqaction *act);
216 #ifdef CONFIG_GENERIC_HARDIRQS
219 # ifdef CONFIG_GENERIC_PENDING_IRQ
220 void move_native_irq(int irq);
221 void move_masked_irq(int irq);
223 static inline void move_irq(int irq) { }
224 static inline void move_native_irq(int irq) { }
225 static inline void move_masked_irq(int irq) { }
228 static inline void move_native_irq(int irq) { }
229 static inline void move_masked_irq(int irq) { }
232 extern int no_irq_affinity;
234 /* Handle irq action chains: */
235 extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
238 * Built-in IRQ handlers for various IRQ types,
239 * callable via desc->handle_irq()
241 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
242 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
243 extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
244 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
245 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
246 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
247 extern void handle_nested_irq(unsigned int irq);
249 /* Handling of unhandled and spurious interrupts: */
250 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
251 irqreturn_t action_ret);
254 /* Enable/disable irq debugging output: */
255 extern int noirqdebug_setup(char *str);
257 /* Checks whether the interrupt can be requested by request_irq(): */
258 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
260 /* Dummy irq-chip implementations: */
261 extern struct irq_chip no_irq_chip;
262 extern struct irq_chip dummy_irq_chip;
265 set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
266 irq_flow_handler_t handle);
268 set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
269 irq_flow_handler_t handle, const char *name);
272 __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
276 * Set a highlevel flow handler for a given IRQ:
279 set_irq_handler(unsigned int irq, irq_flow_handler_t handle)
281 __set_irq_handler(irq, handle, 0, NULL);
285 * Set a highlevel chained flow handler for a given IRQ.
286 * (a chained handler is automatically enabled and set to
287 * IRQ_NOREQUEST and IRQ_NOPROBE)
290 set_irq_chained_handler(unsigned int irq,
291 irq_flow_handler_t handle)
293 __set_irq_handler(irq, handle, 1, NULL);
296 extern void set_irq_nested_thread(unsigned int irq, int nest);
298 extern void set_irq_noprobe(unsigned int irq);
299 extern void set_irq_probe(unsigned int irq);
301 /* Handle dynamic irq creation and destruction */
302 extern unsigned int create_irq_nr(unsigned int irq_want, int node);
303 extern int create_irq(void);
304 extern void destroy_irq(unsigned int irq);
306 /* Dynamic irq helper functions */
307 extern void dynamic_irq_init(unsigned int irq);
308 void dynamic_irq_init_keep_chip_data(unsigned int irq);
309 extern void dynamic_irq_cleanup(unsigned int irq);
310 void dynamic_irq_cleanup_keep_chip_data(unsigned int irq);
312 /* Set/get chip/data for an IRQ: */
313 extern int set_irq_chip(unsigned int irq, struct irq_chip *chip);
314 extern int set_irq_data(unsigned int irq, void *data);
315 extern int set_irq_chip_data(unsigned int irq, void *data);
316 extern int set_irq_type(unsigned int irq, unsigned int type);
317 extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
319 #define get_irq_chip(irq) (irq_to_desc(irq)->irq_data.chip)
320 #define get_irq_chip_data(irq) (irq_to_desc(irq)->irq_data.chip_data)
321 #define get_irq_data(irq) (irq_to_desc(irq)->irq_data.handler_data)
322 #define get_irq_msi(irq) (irq_to_desc(irq)->irq_data.msi_desc)
324 #endif /* CONFIG_GENERIC_HARDIRQS */
326 #endif /* !CONFIG_S390 */
328 #endif /* _LINUX_IRQ_H */