Commit | Line | Data |
---|---|---|
06fcb0c6 IM |
1 | #ifndef _LINUX_IRQ_H |
2 | #define _LINUX_IRQ_H | |
1da177e4 LT |
3 | |
4 | /* | |
5 | * Please do not include this file in generic code. There is currently | |
6 | * no requirement for any architecture to implement anything held | |
7 | * within this file. | |
8 | * | |
9 | * Thanks. --rmk | |
10 | */ | |
11 | ||
23f9b317 | 12 | #include <linux/smp.h> |
1da177e4 | 13 | |
06fcb0c6 | 14 | #ifndef CONFIG_S390 |
1da177e4 LT |
15 | |
16 | #include <linux/linkage.h> | |
17 | #include <linux/cache.h> | |
18 | #include <linux/spinlock.h> | |
19 | #include <linux/cpumask.h> | |
503e5763 | 20 | #include <linux/gfp.h> |
908dcecd | 21 | #include <linux/irqreturn.h> |
dd3a1db9 | 22 | #include <linux/irqnr.h> |
77904fd6 | 23 | #include <linux/errno.h> |
503e5763 | 24 | #include <linux/topology.h> |
3aa551c9 | 25 | #include <linux/wait.h> |
b6873807 | 26 | #include <linux/module.h> |
1da177e4 LT |
27 | |
28 | #include <asm/irq.h> | |
29 | #include <asm/ptrace.h> | |
7d12e780 | 30 | #include <asm/irq_regs.h> |
1da177e4 | 31 | |
ab7798ff | 32 | struct seq_file; |
57a58a94 | 33 | struct irq_desc; |
78129576 | 34 | struct irq_data; |
ec701584 | 35 | typedef void (*irq_flow_handler_t)(unsigned int irq, |
7d12e780 | 36 | struct irq_desc *desc); |
78129576 | 37 | typedef void (*irq_preflow_handler_t)(struct irq_data *data); |
57a58a94 | 38 | |
1da177e4 LT |
39 | /* |
40 | * IRQ line status. | |
6e213616 | 41 | * |
5d4d8fc9 TG |
42 | * Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h |
43 | * | |
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_PROBE - Special flag for probing in progress | |
53 | * | |
54 | * Bits which can be modified via irq_set/clear/modify_status_flags() | |
55 | * IRQ_LEVEL - Interrupt is level type. Will be also | |
56 | * updated in the code when the above trigger | |
0911f124 | 57 | * bits are modified via irq_set_irq_type() |
5d4d8fc9 TG |
58 | * IRQ_PER_CPU - Mark an interrupt PER_CPU. Will protect |
59 | * it from affinity setting | |
60 | * IRQ_NOPROBE - Interrupt cannot be probed by autoprobing | |
61 | * IRQ_NOREQUEST - Interrupt cannot be requested via | |
62 | * request_irq() | |
7f1b1244 | 63 | * IRQ_NOTHREAD - Interrupt cannot be threaded |
5d4d8fc9 TG |
64 | * IRQ_NOAUTOEN - Interrupt is not automatically enabled in |
65 | * request/setup_irq() | |
66 | * IRQ_NO_BALANCING - Interrupt cannot be balanced (affinity set) | |
67 | * IRQ_MOVE_PCNTXT - Interrupt can be migrated from process context | |
68 | * IRQ_NESTED_TRHEAD - Interrupt nests into another thread | |
1da177e4 | 69 | */ |
5d4d8fc9 TG |
70 | enum { |
71 | IRQ_TYPE_NONE = 0x00000000, | |
72 | IRQ_TYPE_EDGE_RISING = 0x00000001, | |
73 | IRQ_TYPE_EDGE_FALLING = 0x00000002, | |
74 | IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING), | |
75 | IRQ_TYPE_LEVEL_HIGH = 0x00000004, | |
76 | IRQ_TYPE_LEVEL_LOW = 0x00000008, | |
77 | IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH), | |
78 | IRQ_TYPE_SENSE_MASK = 0x0000000f, | |
79 | ||
80 | IRQ_TYPE_PROBE = 0x00000010, | |
81 | ||
82 | IRQ_LEVEL = (1 << 8), | |
83 | IRQ_PER_CPU = (1 << 9), | |
84 | IRQ_NOPROBE = (1 << 10), | |
85 | IRQ_NOREQUEST = (1 << 11), | |
86 | IRQ_NOAUTOEN = (1 << 12), | |
87 | IRQ_NO_BALANCING = (1 << 13), | |
88 | IRQ_MOVE_PCNTXT = (1 << 14), | |
89 | IRQ_NESTED_THREAD = (1 << 15), | |
7f1b1244 | 90 | IRQ_NOTHREAD = (1 << 16), |
5d4d8fc9 | 91 | }; |
950f4427 | 92 | |
44247184 TG |
93 | #define IRQF_MODIFY_MASK \ |
94 | (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ | |
872434d6 | 95 | IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \ |
6f91a52d | 96 | IRQ_PER_CPU | IRQ_NESTED_THREAD) |
44247184 | 97 | |
8f53f924 TG |
98 | #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) |
99 | ||
3b8249e7 TG |
100 | /* |
101 | * Return value for chip->irq_set_affinity() | |
102 | * | |
103 | * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity | |
104 | * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity | |
105 | */ | |
106 | enum { | |
107 | IRQ_SET_MASK_OK = 0, | |
108 | IRQ_SET_MASK_OK_NOCOPY, | |
109 | }; | |
110 | ||
5b912c10 | 111 | struct msi_desc; |
08a543ad | 112 | struct irq_domain; |
6a6de9ef | 113 | |
ff7dcd44 TG |
114 | /** |
115 | * struct irq_data - per irq and irq chip data passed down to chip functions | |
116 | * @irq: interrupt number | |
08a543ad | 117 | * @hwirq: hardware interrupt number, local to the interrupt domain |
ff7dcd44 | 118 | * @node: node index useful for balancing |
30398bf6 | 119 | * @state_use_accessors: status information for irq chip functions. |
91c49917 | 120 | * Use accessor functions to deal with it |
ff7dcd44 | 121 | * @chip: low level interrupt hardware access |
08a543ad GL |
122 | * @domain: Interrupt translation domain; responsible for mapping |
123 | * between hwirq number and linux irq number. | |
ff7dcd44 TG |
124 | * @handler_data: per-IRQ data for the irq_chip methods |
125 | * @chip_data: platform-specific per-chip private data for the chip | |
126 | * methods, to allow shared chip implementations | |
127 | * @msi_desc: MSI descriptor | |
128 | * @affinity: IRQ affinity on SMP | |
ff7dcd44 TG |
129 | * |
130 | * The fields here need to overlay the ones in irq_desc until we | |
131 | * cleaned up the direct references and switched everything over to | |
132 | * irq_data. | |
133 | */ | |
134 | struct irq_data { | |
135 | unsigned int irq; | |
08a543ad | 136 | unsigned long hwirq; |
ff7dcd44 | 137 | unsigned int node; |
91c49917 | 138 | unsigned int state_use_accessors; |
ff7dcd44 | 139 | struct irq_chip *chip; |
08a543ad | 140 | struct irq_domain *domain; |
ff7dcd44 TG |
141 | void *handler_data; |
142 | void *chip_data; | |
143 | struct msi_desc *msi_desc; | |
144 | #ifdef CONFIG_SMP | |
145 | cpumask_var_t affinity; | |
146 | #endif | |
ff7dcd44 TG |
147 | }; |
148 | ||
f230b6d5 TG |
149 | /* |
150 | * Bit masks for irq_data.state | |
151 | * | |
876dbd4c | 152 | * IRQD_TRIGGER_MASK - Mask for the trigger type bits |
f230b6d5 | 153 | * IRQD_SETAFFINITY_PENDING - Affinity setting is pending |
a005677b TG |
154 | * IRQD_NO_BALANCING - Balancing disabled for this IRQ |
155 | * IRQD_PER_CPU - Interrupt is per cpu | |
2bdd1055 | 156 | * IRQD_AFFINITY_SET - Interrupt affinity was set |
876dbd4c | 157 | * IRQD_LEVEL - Interrupt is level triggered |
7f94226f TG |
158 | * IRQD_WAKEUP_STATE - Interrupt is configured for wakeup |
159 | * from suspend | |
e1ef8241 TG |
160 | * IRDQ_MOVE_PCNTXT - Interrupt can be moved in process |
161 | * context | |
32f4125e TG |
162 | * IRQD_IRQ_DISABLED - Disabled state of the interrupt |
163 | * IRQD_IRQ_MASKED - Masked state of the interrupt | |
164 | * IRQD_IRQ_INPROGRESS - In progress state of the interrupt | |
f230b6d5 TG |
165 | */ |
166 | enum { | |
876dbd4c | 167 | IRQD_TRIGGER_MASK = 0xf, |
a005677b TG |
168 | IRQD_SETAFFINITY_PENDING = (1 << 8), |
169 | IRQD_NO_BALANCING = (1 << 10), | |
170 | IRQD_PER_CPU = (1 << 11), | |
2bdd1055 | 171 | IRQD_AFFINITY_SET = (1 << 12), |
876dbd4c | 172 | IRQD_LEVEL = (1 << 13), |
7f94226f | 173 | IRQD_WAKEUP_STATE = (1 << 14), |
e1ef8241 | 174 | IRQD_MOVE_PCNTXT = (1 << 15), |
801a0e9a | 175 | IRQD_IRQ_DISABLED = (1 << 16), |
32f4125e TG |
176 | IRQD_IRQ_MASKED = (1 << 17), |
177 | IRQD_IRQ_INPROGRESS = (1 << 18), | |
f230b6d5 TG |
178 | }; |
179 | ||
180 | static inline bool irqd_is_setaffinity_pending(struct irq_data *d) | |
181 | { | |
182 | return d->state_use_accessors & IRQD_SETAFFINITY_PENDING; | |
183 | } | |
184 | ||
a005677b TG |
185 | static inline bool irqd_is_per_cpu(struct irq_data *d) |
186 | { | |
187 | return d->state_use_accessors & IRQD_PER_CPU; | |
188 | } | |
189 | ||
190 | static inline bool irqd_can_balance(struct irq_data *d) | |
191 | { | |
192 | return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING)); | |
193 | } | |
194 | ||
2bdd1055 TG |
195 | static inline bool irqd_affinity_was_set(struct irq_data *d) |
196 | { | |
197 | return d->state_use_accessors & IRQD_AFFINITY_SET; | |
198 | } | |
199 | ||
ee38c04b TG |
200 | static inline void irqd_mark_affinity_was_set(struct irq_data *d) |
201 | { | |
202 | d->state_use_accessors |= IRQD_AFFINITY_SET; | |
203 | } | |
204 | ||
876dbd4c TG |
205 | static inline u32 irqd_get_trigger_type(struct irq_data *d) |
206 | { | |
207 | return d->state_use_accessors & IRQD_TRIGGER_MASK; | |
208 | } | |
209 | ||
210 | /* | |
211 | * Must only be called inside irq_chip.irq_set_type() functions. | |
212 | */ | |
213 | static inline void irqd_set_trigger_type(struct irq_data *d, u32 type) | |
214 | { | |
215 | d->state_use_accessors &= ~IRQD_TRIGGER_MASK; | |
216 | d->state_use_accessors |= type & IRQD_TRIGGER_MASK; | |
217 | } | |
218 | ||
219 | static inline bool irqd_is_level_type(struct irq_data *d) | |
220 | { | |
221 | return d->state_use_accessors & IRQD_LEVEL; | |
222 | } | |
223 | ||
7f94226f TG |
224 | static inline bool irqd_is_wakeup_set(struct irq_data *d) |
225 | { | |
226 | return d->state_use_accessors & IRQD_WAKEUP_STATE; | |
227 | } | |
228 | ||
e1ef8241 TG |
229 | static inline bool irqd_can_move_in_process_context(struct irq_data *d) |
230 | { | |
231 | return d->state_use_accessors & IRQD_MOVE_PCNTXT; | |
232 | } | |
233 | ||
801a0e9a TG |
234 | static inline bool irqd_irq_disabled(struct irq_data *d) |
235 | { | |
236 | return d->state_use_accessors & IRQD_IRQ_DISABLED; | |
237 | } | |
238 | ||
32f4125e TG |
239 | static inline bool irqd_irq_masked(struct irq_data *d) |
240 | { | |
241 | return d->state_use_accessors & IRQD_IRQ_MASKED; | |
242 | } | |
243 | ||
244 | static inline bool irqd_irq_inprogress(struct irq_data *d) | |
245 | { | |
246 | return d->state_use_accessors & IRQD_IRQ_INPROGRESS; | |
247 | } | |
248 | ||
9cff60df TG |
249 | /* |
250 | * Functions for chained handlers which can be enabled/disabled by the | |
251 | * standard disable_irq/enable_irq calls. Must be called with | |
252 | * irq_desc->lock held. | |
253 | */ | |
254 | static inline void irqd_set_chained_irq_inprogress(struct irq_data *d) | |
255 | { | |
256 | d->state_use_accessors |= IRQD_IRQ_INPROGRESS; | |
257 | } | |
258 | ||
259 | static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d) | |
260 | { | |
261 | d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS; | |
262 | } | |
263 | ||
8fee5c36 | 264 | /** |
6a6de9ef | 265 | * struct irq_chip - hardware interrupt chip descriptor |
8fee5c36 IM |
266 | * |
267 | * @name: name for /proc/interrupts | |
f8822657 TG |
268 | * @irq_startup: start up the interrupt (defaults to ->enable if NULL) |
269 | * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL) | |
270 | * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL) | |
271 | * @irq_disable: disable the interrupt | |
272 | * @irq_ack: start of a new interrupt | |
273 | * @irq_mask: mask an interrupt source | |
274 | * @irq_mask_ack: ack and mask an interrupt source | |
275 | * @irq_unmask: unmask an interrupt source | |
276 | * @irq_eoi: end of interrupt | |
277 | * @irq_set_affinity: set the CPU affinity on SMP machines | |
278 | * @irq_retrigger: resend an IRQ to the CPU | |
279 | * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ | |
280 | * @irq_set_wake: enable/disable power-management wake-on of an IRQ | |
281 | * @irq_bus_lock: function to lock access to slow bus (i2c) chips | |
282 | * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips | |
0fdb4b25 DD |
283 | * @irq_cpu_online: configure an interrupt source for a secondary CPU |
284 | * @irq_cpu_offline: un-configure an interrupt source for a secondary CPU | |
cfefd21e TG |
285 | * @irq_suspend: function called from core code on suspend once per chip |
286 | * @irq_resume: function called from core code on resume once per chip | |
287 | * @irq_pm_shutdown: function called from core code on shutdown once per chip | |
ab7798ff | 288 | * @irq_print_chip: optional to print special chip info in show_interrupts |
2bff17ad | 289 | * @flags: chip specific flags |
70aedd24 | 290 | * |
8fee5c36 | 291 | * @release: release function solely used by UML |
1da177e4 | 292 | */ |
6a6de9ef TG |
293 | struct irq_chip { |
294 | const char *name; | |
f8822657 TG |
295 | unsigned int (*irq_startup)(struct irq_data *data); |
296 | void (*irq_shutdown)(struct irq_data *data); | |
297 | void (*irq_enable)(struct irq_data *data); | |
298 | void (*irq_disable)(struct irq_data *data); | |
299 | ||
300 | void (*irq_ack)(struct irq_data *data); | |
301 | void (*irq_mask)(struct irq_data *data); | |
302 | void (*irq_mask_ack)(struct irq_data *data); | |
303 | void (*irq_unmask)(struct irq_data *data); | |
304 | void (*irq_eoi)(struct irq_data *data); | |
305 | ||
306 | int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force); | |
307 | int (*irq_retrigger)(struct irq_data *data); | |
308 | int (*irq_set_type)(struct irq_data *data, unsigned int flow_type); | |
309 | int (*irq_set_wake)(struct irq_data *data, unsigned int on); | |
310 | ||
311 | void (*irq_bus_lock)(struct irq_data *data); | |
312 | void (*irq_bus_sync_unlock)(struct irq_data *data); | |
313 | ||
0fdb4b25 DD |
314 | void (*irq_cpu_online)(struct irq_data *data); |
315 | void (*irq_cpu_offline)(struct irq_data *data); | |
316 | ||
cfefd21e TG |
317 | void (*irq_suspend)(struct irq_data *data); |
318 | void (*irq_resume)(struct irq_data *data); | |
319 | void (*irq_pm_shutdown)(struct irq_data *data); | |
320 | ||
ab7798ff TG |
321 | void (*irq_print_chip)(struct irq_data *data, struct seq_file *p); |
322 | ||
2bff17ad TG |
323 | unsigned long flags; |
324 | ||
b77d6adc PBG |
325 | /* Currently used only by UML, might disappear one day.*/ |
326 | #ifdef CONFIG_IRQ_RELEASE_METHOD | |
71d218b7 | 327 | void (*release)(unsigned int irq, void *dev_id); |
b77d6adc | 328 | #endif |
1da177e4 LT |
329 | }; |
330 | ||
d4d5e089 TG |
331 | /* |
332 | * irq_chip specific flags | |
333 | * | |
77694b40 TG |
334 | * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type() |
335 | * IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled | |
d209a699 | 336 | * IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path |
b3d42232 TG |
337 | * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks |
338 | * when irq enabled | |
d4d5e089 TG |
339 | */ |
340 | enum { | |
341 | IRQCHIP_SET_TYPE_MASKED = (1 << 0), | |
77694b40 | 342 | IRQCHIP_EOI_IF_HANDLED = (1 << 1), |
d209a699 | 343 | IRQCHIP_MASK_ON_SUSPEND = (1 << 2), |
b3d42232 | 344 | IRQCHIP_ONOFFLINE_ENABLED = (1 << 3), |
d4d5e089 TG |
345 | }; |
346 | ||
e144710b TG |
347 | /* This include will go away once we isolated irq_desc usage to core code */ |
348 | #include <linux/irqdesc.h> | |
0b8f1efa | 349 | |
34ffdb72 IM |
350 | /* |
351 | * Pick up the arch-dependent methods: | |
352 | */ | |
353 | #include <asm/hw_irq.h> | |
1da177e4 | 354 | |
b683de2b TG |
355 | #ifndef NR_IRQS_LEGACY |
356 | # define NR_IRQS_LEGACY 0 | |
357 | #endif | |
358 | ||
1318a481 TG |
359 | #ifndef ARCH_IRQ_INIT_FLAGS |
360 | # define ARCH_IRQ_INIT_FLAGS 0 | |
361 | #endif | |
362 | ||
c1594b77 | 363 | #define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS |
1318a481 | 364 | |
e144710b | 365 | struct irqaction; |
06fcb0c6 | 366 | extern int setup_irq(unsigned int irq, struct irqaction *new); |
cbf94f06 | 367 | extern void remove_irq(unsigned int irq, struct irqaction *act); |
1da177e4 | 368 | |
0fdb4b25 DD |
369 | extern void irq_cpu_online(void); |
370 | extern void irq_cpu_offline(void); | |
c2d0c555 | 371 | extern int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *cpumask); |
0fdb4b25 | 372 | |
1da177e4 | 373 | #ifdef CONFIG_GENERIC_HARDIRQS |
06fcb0c6 | 374 | |
3a3856d0 | 375 | #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ) |
a439520f TG |
376 | void irq_move_irq(struct irq_data *data); |
377 | void irq_move_masked_irq(struct irq_data *data); | |
e144710b | 378 | #else |
a439520f TG |
379 | static inline void irq_move_irq(struct irq_data *data) { } |
380 | static inline void irq_move_masked_irq(struct irq_data *data) { } | |
e144710b | 381 | #endif |
54d5d424 | 382 | |
1da177e4 | 383 | extern int no_irq_affinity; |
1da177e4 | 384 | |
6a6de9ef TG |
385 | /* |
386 | * Built-in IRQ handlers for various IRQ types, | |
bebd04cc | 387 | * callable via desc->handle_irq() |
6a6de9ef | 388 | */ |
ec701584 HH |
389 | extern void handle_level_irq(unsigned int irq, struct irq_desc *desc); |
390 | extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc); | |
391 | extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc); | |
0521c8fb | 392 | extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc); |
ec701584 HH |
393 | extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc); |
394 | extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc); | |
395 | extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); | |
31b47cf7 | 396 | extern void handle_nested_irq(unsigned int irq); |
6a6de9ef | 397 | |
6a6de9ef | 398 | /* Handling of unhandled and spurious interrupts: */ |
34ffdb72 | 399 | extern void note_interrupt(unsigned int irq, struct irq_desc *desc, |
bedd30d9 | 400 | irqreturn_t action_ret); |
1da177e4 | 401 | |
a4633adc | 402 | |
6a6de9ef TG |
403 | /* Enable/disable irq debugging output: */ |
404 | extern int noirqdebug_setup(char *str); | |
405 | ||
406 | /* Checks whether the interrupt can be requested by request_irq(): */ | |
407 | extern int can_request_irq(unsigned int irq, unsigned long irqflags); | |
408 | ||
f8b5473f | 409 | /* Dummy irq-chip implementations: */ |
6a6de9ef | 410 | extern struct irq_chip no_irq_chip; |
f8b5473f | 411 | extern struct irq_chip dummy_irq_chip; |
6a6de9ef | 412 | |
145fc655 | 413 | extern void |
3836ca08 | 414 | irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip, |
a460e745 IM |
415 | irq_flow_handler_t handle, const char *name); |
416 | ||
3836ca08 TG |
417 | static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip, |
418 | irq_flow_handler_t handle) | |
419 | { | |
420 | irq_set_chip_and_handler_name(irq, chip, handle, NULL); | |
421 | } | |
422 | ||
6a6de9ef | 423 | extern void |
3836ca08 | 424 | __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, |
a460e745 | 425 | const char *name); |
1da177e4 | 426 | |
6a6de9ef | 427 | static inline void |
3836ca08 | 428 | irq_set_handler(unsigned int irq, irq_flow_handler_t handle) |
6a6de9ef | 429 | { |
3836ca08 | 430 | __irq_set_handler(irq, handle, 0, NULL); |
6a6de9ef TG |
431 | } |
432 | ||
433 | /* | |
434 | * Set a highlevel chained flow handler for a given IRQ. | |
435 | * (a chained handler is automatically enabled and set to | |
7f1b1244 | 436 | * IRQ_NOREQUEST, IRQ_NOPROBE, and IRQ_NOTHREAD) |
6a6de9ef TG |
437 | */ |
438 | static inline void | |
3836ca08 | 439 | irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle) |
6a6de9ef | 440 | { |
3836ca08 | 441 | __irq_set_handler(irq, handle, 1, NULL); |
6a6de9ef TG |
442 | } |
443 | ||
44247184 TG |
444 | void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set); |
445 | ||
446 | static inline void irq_set_status_flags(unsigned int irq, unsigned long set) | |
447 | { | |
448 | irq_modify_status(irq, 0, set); | |
449 | } | |
450 | ||
451 | static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr) | |
452 | { | |
453 | irq_modify_status(irq, clr, 0); | |
454 | } | |
455 | ||
a0cd9ca2 | 456 | static inline void irq_set_noprobe(unsigned int irq) |
44247184 TG |
457 | { |
458 | irq_modify_status(irq, 0, IRQ_NOPROBE); | |
459 | } | |
460 | ||
a0cd9ca2 | 461 | static inline void irq_set_probe(unsigned int irq) |
44247184 TG |
462 | { |
463 | irq_modify_status(irq, IRQ_NOPROBE, 0); | |
464 | } | |
46f4f8f6 | 465 | |
7f1b1244 PM |
466 | static inline void irq_set_nothread(unsigned int irq) |
467 | { | |
468 | irq_modify_status(irq, 0, IRQ_NOTHREAD); | |
469 | } | |
470 | ||
471 | static inline void irq_set_thread(unsigned int irq) | |
472 | { | |
473 | irq_modify_status(irq, IRQ_NOTHREAD, 0); | |
474 | } | |
475 | ||
6f91a52d TG |
476 | static inline void irq_set_nested_thread(unsigned int irq, bool nest) |
477 | { | |
478 | if (nest) | |
479 | irq_set_status_flags(irq, IRQ_NESTED_THREAD); | |
480 | else | |
481 | irq_clear_status_flags(irq, IRQ_NESTED_THREAD); | |
482 | } | |
483 | ||
3a16d713 | 484 | /* Handle dynamic irq creation and destruction */ |
d047f53a | 485 | extern unsigned int create_irq_nr(unsigned int irq_want, int node); |
3a16d713 EB |
486 | extern int create_irq(void); |
487 | extern void destroy_irq(unsigned int irq); | |
488 | ||
b7b29338 TG |
489 | /* |
490 | * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and | |
491 | * irq_free_desc instead. | |
492 | */ | |
3a16d713 | 493 | extern void dynamic_irq_cleanup(unsigned int irq); |
b7b29338 TG |
494 | static inline void dynamic_irq_init(unsigned int irq) |
495 | { | |
496 | dynamic_irq_cleanup(irq); | |
497 | } | |
dd87eb3a | 498 | |
3a16d713 | 499 | /* Set/get chip/data for an IRQ: */ |
a0cd9ca2 TG |
500 | extern int irq_set_chip(unsigned int irq, struct irq_chip *chip); |
501 | extern int irq_set_handler_data(unsigned int irq, void *data); | |
502 | extern int irq_set_chip_data(unsigned int irq, void *data); | |
503 | extern int irq_set_irq_type(unsigned int irq, unsigned int type); | |
504 | extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry); | |
f303a6dd | 505 | extern struct irq_data *irq_get_irq_data(unsigned int irq); |
dd87eb3a | 506 | |
a0cd9ca2 | 507 | static inline struct irq_chip *irq_get_chip(unsigned int irq) |
f303a6dd TG |
508 | { |
509 | struct irq_data *d = irq_get_irq_data(irq); | |
510 | return d ? d->chip : NULL; | |
511 | } | |
512 | ||
513 | static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d) | |
514 | { | |
515 | return d->chip; | |
516 | } | |
517 | ||
a0cd9ca2 | 518 | static inline void *irq_get_chip_data(unsigned int irq) |
f303a6dd TG |
519 | { |
520 | struct irq_data *d = irq_get_irq_data(irq); | |
521 | return d ? d->chip_data : NULL; | |
522 | } | |
523 | ||
524 | static inline void *irq_data_get_irq_chip_data(struct irq_data *d) | |
525 | { | |
526 | return d->chip_data; | |
527 | } | |
528 | ||
a0cd9ca2 | 529 | static inline void *irq_get_handler_data(unsigned int irq) |
f303a6dd TG |
530 | { |
531 | struct irq_data *d = irq_get_irq_data(irq); | |
532 | return d ? d->handler_data : NULL; | |
533 | } | |
534 | ||
a0cd9ca2 | 535 | static inline void *irq_data_get_irq_handler_data(struct irq_data *d) |
f303a6dd TG |
536 | { |
537 | return d->handler_data; | |
538 | } | |
539 | ||
a0cd9ca2 | 540 | static inline struct msi_desc *irq_get_msi_desc(unsigned int irq) |
f303a6dd TG |
541 | { |
542 | struct irq_data *d = irq_get_irq_data(irq); | |
543 | return d ? d->msi_desc : NULL; | |
544 | } | |
545 | ||
546 | static inline struct msi_desc *irq_data_get_msi(struct irq_data *d) | |
547 | { | |
548 | return d->msi_desc; | |
549 | } | |
550 | ||
b6873807 SAS |
551 | int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node, |
552 | struct module *owner); | |
553 | ||
554 | static inline int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, | |
555 | int node) | |
556 | { | |
557 | return __irq_alloc_descs(irq, from, cnt, node, THIS_MODULE); | |
558 | } | |
559 | ||
1f5a5b87 | 560 | void irq_free_descs(unsigned int irq, unsigned int cnt); |
06f6c339 | 561 | int irq_reserve_irqs(unsigned int from, unsigned int cnt); |
1f5a5b87 TG |
562 | |
563 | static inline int irq_alloc_desc(int node) | |
564 | { | |
565 | return irq_alloc_descs(-1, 0, 1, node); | |
566 | } | |
567 | ||
568 | static inline int irq_alloc_desc_at(unsigned int at, int node) | |
569 | { | |
570 | return irq_alloc_descs(at, at, 1, node); | |
571 | } | |
572 | ||
573 | static inline int irq_alloc_desc_from(unsigned int from, int node) | |
574 | { | |
575 | return irq_alloc_descs(-1, from, 1, node); | |
576 | } | |
577 | ||
578 | static inline void irq_free_desc(unsigned int irq) | |
579 | { | |
580 | irq_free_descs(irq, 1); | |
581 | } | |
582 | ||
639bd12f PM |
583 | static inline int irq_reserve_irq(unsigned int irq) |
584 | { | |
585 | return irq_reserve_irqs(irq, 1); | |
586 | } | |
587 | ||
7d828062 TG |
588 | #ifndef irq_reg_writel |
589 | # define irq_reg_writel(val, addr) writel(val, addr) | |
590 | #endif | |
591 | #ifndef irq_reg_readl | |
592 | # define irq_reg_readl(addr) readl(addr) | |
593 | #endif | |
594 | ||
595 | /** | |
596 | * struct irq_chip_regs - register offsets for struct irq_gci | |
597 | * @enable: Enable register offset to reg_base | |
598 | * @disable: Disable register offset to reg_base | |
599 | * @mask: Mask register offset to reg_base | |
600 | * @ack: Ack register offset to reg_base | |
601 | * @eoi: Eoi register offset to reg_base | |
602 | * @type: Type configuration register offset to reg_base | |
603 | * @polarity: Polarity configuration register offset to reg_base | |
604 | */ | |
605 | struct irq_chip_regs { | |
606 | unsigned long enable; | |
607 | unsigned long disable; | |
608 | unsigned long mask; | |
609 | unsigned long ack; | |
610 | unsigned long eoi; | |
611 | unsigned long type; | |
612 | unsigned long polarity; | |
613 | }; | |
614 | ||
615 | /** | |
616 | * struct irq_chip_type - Generic interrupt chip instance for a flow type | |
617 | * @chip: The real interrupt chip which provides the callbacks | |
618 | * @regs: Register offsets for this chip | |
619 | * @handler: Flow handler associated with this chip | |
620 | * @type: Chip can handle these flow types | |
621 | * | |
622 | * A irq_generic_chip can have several instances of irq_chip_type when | |
623 | * it requires different functions and register offsets for different | |
624 | * flow types. | |
625 | */ | |
626 | struct irq_chip_type { | |
627 | struct irq_chip chip; | |
628 | struct irq_chip_regs regs; | |
629 | irq_flow_handler_t handler; | |
630 | u32 type; | |
631 | }; | |
632 | ||
633 | /** | |
634 | * struct irq_chip_generic - Generic irq chip data structure | |
635 | * @lock: Lock to protect register and cache data access | |
636 | * @reg_base: Register base address (virtual) | |
637 | * @irq_base: Interrupt base nr for this chip | |
638 | * @irq_cnt: Number of interrupts handled by this chip | |
639 | * @mask_cache: Cached mask register | |
640 | * @type_cache: Cached type register | |
641 | * @polarity_cache: Cached polarity register | |
642 | * @wake_enabled: Interrupt can wakeup from suspend | |
643 | * @wake_active: Interrupt is marked as an wakeup from suspend source | |
644 | * @num_ct: Number of available irq_chip_type instances (usually 1) | |
645 | * @private: Private data for non generic chip callbacks | |
cfefd21e | 646 | * @list: List head for keeping track of instances |
7d828062 TG |
647 | * @chip_types: Array of interrupt irq_chip_types |
648 | * | |
649 | * Note, that irq_chip_generic can have multiple irq_chip_type | |
650 | * implementations which can be associated to a particular irq line of | |
651 | * an irq_chip_generic instance. That allows to share and protect | |
652 | * state in an irq_chip_generic instance when we need to implement | |
653 | * different flow mechanisms (level/edge) for it. | |
654 | */ | |
655 | struct irq_chip_generic { | |
656 | raw_spinlock_t lock; | |
657 | void __iomem *reg_base; | |
658 | unsigned int irq_base; | |
659 | unsigned int irq_cnt; | |
660 | u32 mask_cache; | |
661 | u32 type_cache; | |
662 | u32 polarity_cache; | |
663 | u32 wake_enabled; | |
664 | u32 wake_active; | |
665 | unsigned int num_ct; | |
666 | void *private; | |
cfefd21e | 667 | struct list_head list; |
7d828062 TG |
668 | struct irq_chip_type chip_types[0]; |
669 | }; | |
670 | ||
671 | /** | |
672 | * enum irq_gc_flags - Initialization flags for generic irq chips | |
673 | * @IRQ_GC_INIT_MASK_CACHE: Initialize the mask_cache by reading mask reg | |
674 | * @IRQ_GC_INIT_NESTED_LOCK: Set the lock class of the irqs to nested for | |
675 | * irq chips which need to call irq_set_wake() on | |
676 | * the parent irq. Usually GPIO implementations | |
677 | */ | |
678 | enum irq_gc_flags { | |
679 | IRQ_GC_INIT_MASK_CACHE = 1 << 0, | |
680 | IRQ_GC_INIT_NESTED_LOCK = 1 << 1, | |
681 | }; | |
682 | ||
683 | /* Generic chip callback functions */ | |
684 | void irq_gc_noop(struct irq_data *d); | |
685 | void irq_gc_mask_disable_reg(struct irq_data *d); | |
686 | void irq_gc_mask_set_bit(struct irq_data *d); | |
687 | void irq_gc_mask_clr_bit(struct irq_data *d); | |
688 | void irq_gc_unmask_enable_reg(struct irq_data *d); | |
659fb32d SG |
689 | void irq_gc_ack_set_bit(struct irq_data *d); |
690 | void irq_gc_ack_clr_bit(struct irq_data *d); | |
7d828062 TG |
691 | void irq_gc_mask_disable_reg_and_ack(struct irq_data *d); |
692 | void irq_gc_eoi(struct irq_data *d); | |
693 | int irq_gc_set_wake(struct irq_data *d, unsigned int on); | |
694 | ||
695 | /* Setup functions for irq_chip_generic */ | |
696 | struct irq_chip_generic * | |
697 | irq_alloc_generic_chip(const char *name, int nr_ct, unsigned int irq_base, | |
698 | void __iomem *reg_base, irq_flow_handler_t handler); | |
699 | void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk, | |
700 | enum irq_gc_flags flags, unsigned int clr, | |
701 | unsigned int set); | |
702 | int irq_setup_alt_chip(struct irq_data *d, unsigned int type); | |
cfefd21e TG |
703 | void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk, |
704 | unsigned int clr, unsigned int set); | |
7d828062 TG |
705 | |
706 | static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d) | |
707 | { | |
708 | return container_of(d->chip, struct irq_chip_type, chip); | |
709 | } | |
710 | ||
711 | #define IRQ_MSK(n) (u32)((n) < 32 ? ((1 << (n)) - 1) : UINT_MAX) | |
712 | ||
713 | #ifdef CONFIG_SMP | |
714 | static inline void irq_gc_lock(struct irq_chip_generic *gc) | |
715 | { | |
716 | raw_spin_lock(&gc->lock); | |
717 | } | |
718 | ||
719 | static inline void irq_gc_unlock(struct irq_chip_generic *gc) | |
720 | { | |
721 | raw_spin_unlock(&gc->lock); | |
722 | } | |
723 | #else | |
724 | static inline void irq_gc_lock(struct irq_chip_generic *gc) { } | |
725 | static inline void irq_gc_unlock(struct irq_chip_generic *gc) { } | |
726 | #endif | |
727 | ||
6a6de9ef | 728 | #endif /* CONFIG_GENERIC_HARDIRQS */ |
1da177e4 | 729 | |
06fcb0c6 | 730 | #endif /* !CONFIG_S390 */ |
1da177e4 | 731 | |
06fcb0c6 | 732 | #endif /* _LINUX_IRQ_H */ |