include/linux/irq.h

   1 #ifndef _LINUX_IRQ_H
   2 #define _LINUX_IRQ_H
   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
  12 #include <linux/smp.h>
  13
  14 #ifndef CONFIG_S390
  15
  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>
  26
  27 #include <asm/irq.h>
  28 #include <asm/ptrace.h>
  29 #include <asm/irq_regs.h>
  30
  31 struct seq_file;
  32 struct irq_desc;
  33 struct irq_data;
  34 typedef void (*irq_flow_handler_t)(unsigned int irq,
  35                                             struct irq_desc *desc);
  36 typedef void (*irq_preflow_handler_t)(struct irq_data *data);
  37
  38 /*
  39  * IRQ line status.
  40  *
  41  * Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
  42  *
  43  * IRQ_TYPE_NONE                - default, unspecified type
  44  * IRQ_TYPE_EDGE_RISING         - rising edge triggered
  45  * IRQ_TYPE_EDGE_FALLING        - falling edge triggered
  46  * IRQ_TYPE_EDGE_BOTH           - rising and falling edge triggered
  47  * IRQ_TYPE_LEVEL_HIGH          - high level triggered
  48  * IRQ_TYPE_LEVEL_LOW           - low level triggered
  49  * IRQ_TYPE_LEVEL_MASK          - Mask to filter out the level bits
  50  * IRQ_TYPE_SENSE_MASK          - Mask for all the above bits
  51  * IRQ_TYPE_PROBE               - Special flag for probing in progress
  52  *
  53  * Bits which can be modified via irq_set/clear/modify_status_flags()
  54  * IRQ_LEVEL                    - Interrupt is level type. Will be also
  55  *                                updated in the code when the above trigger
  56  *                                bits are modified via set_irq_type()
  57  * IRQ_PER_CPU                  - Mark an interrupt PER_CPU. Will protect
  58  *                                it from affinity setting
  59  * IRQ_NOPROBE                  - Interrupt cannot be probed by autoprobing
  60  * IRQ_NOREQUEST                - Interrupt cannot be requested via
  61  *                                request_irq()
  62  * IRQ_NOAUTOEN                 - Interrupt is not automatically enabled in
  63  *                                request/setup_irq()
  64  * IRQ_NO_BALANCING             - Interrupt cannot be balanced (affinity set)
  65  * IRQ_MOVE_PCNTXT              - Interrupt can be migrated from process context
  66  * IRQ_NESTED_TRHEAD            - Interrupt nests into another thread
  67  *
  68  * Deprecated bits. They are kept updated as long as
  69  * CONFIG_GENERIC_HARDIRQS_NO_COMPAT is not set. Will go away soon. These bits
  70  * are internal state of the core code and if you really need to acces
  71  * them then talk to the genirq maintainer instead of hacking
  72  * something weird.
  73  *
  74  */
  75 enum {
  76         IRQ_TYPE_NONE           = 0x00000000,
  77         IRQ_TYPE_EDGE_RISING    = 0x00000001,
  78         IRQ_TYPE_EDGE_FALLING   = 0x00000002,
  79         IRQ_TYPE_EDGE_BOTH      = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
  80         IRQ_TYPE_LEVEL_HIGH     = 0x00000004,
  81         IRQ_TYPE_LEVEL_LOW      = 0x00000008,
  82         IRQ_TYPE_LEVEL_MASK     = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),
  83         IRQ_TYPE_SENSE_MASK     = 0x0000000f,
  84
  85         IRQ_TYPE_PROBE          = 0x00000010,
  86
  87         IRQ_LEVEL               = (1 <<  8),
  88         IRQ_PER_CPU             = (1 <<  9),
  89         IRQ_NOPROBE             = (1 << 10),
  90         IRQ_NOREQUEST           = (1 << 11),
  91         IRQ_NOAUTOEN            = (1 << 12),
  92         IRQ_NO_BALANCING        = (1 << 13),
  93         IRQ_MOVE_PCNTXT         = (1 << 14),
  94         IRQ_NESTED_THREAD       = (1 << 15),
  95
  96 #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
  97         IRQ_INPROGRESS          = (1 << 16),
  98         IRQ_REPLAY              = (1 << 17),
  99         IRQ_WAITING             = (1 << 18),
 100         IRQ_DISABLED            = (1 << 19),
 101         IRQ_PENDING             = (1 << 20),
 102         IRQ_MASKED              = (1 << 21),
 103         IRQ_MOVE_PENDING        = (1 << 22),
 104         IRQ_AFFINITY_SET        = (1 << 23),
 105         IRQ_WAKEUP              = (1 << 24),
 106 #endif
 107 };
 108
 109 #define IRQF_MODIFY_MASK        \
 110         (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
 111          IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
 112          IRQ_PER_CPU | IRQ_NESTED_THREAD)
 113
 114 #define IRQ_NO_BALANCING_MASK   (IRQ_PER_CPU | IRQ_NO_BALANCING)
 115
 116 static inline __deprecated bool CHECK_IRQ_PER_CPU(unsigned int status)
 117 {
 118         return status & IRQ_PER_CPU;
 119 }
 120
 121 /*
 122  * Return value for chip->irq_set_affinity()
 123  *
 124  * IRQ_SET_MASK_OK      - OK, core updates irq_data.affinity
 125  * IRQ_SET_MASK_NOCPY   - OK, chip did update irq_data.affinity
 126  */
 127 enum {
 128         IRQ_SET_MASK_OK = 0,
 129         IRQ_SET_MASK_OK_NOCOPY,
 130 };
 131
 132 struct msi_desc;
 133
 134 /**
 135  * struct irq_data - per irq and irq chip data passed down to chip functions
 136  * @irq:                interrupt number
 137  * @node:               node index useful for balancing
 138  * @state_use_accessor: status information for irq chip functions.
 139  *                      Use accessor functions to deal with it
 140  * @chip:               low level interrupt hardware access
 141  * @handler_data:       per-IRQ data for the irq_chip methods
 142  * @chip_data:          platform-specific per-chip private data for the chip
 143  *                      methods, to allow shared chip implementations
 144  * @msi_desc:           MSI descriptor
 145  * @affinity:           IRQ affinity on SMP
 146  *
 147  * The fields here need to overlay the ones in irq_desc until we
 148  * cleaned up the direct references and switched everything over to
 149  * irq_data.
 150  */
 151 struct irq_data {
 152         unsigned int            irq;
 153         unsigned int            node;
 154         unsigned int            state_use_accessors;
 155         struct irq_chip         *chip;
 156         void                    *handler_data;
 157         void                    *chip_data;
 158         struct msi_desc         *msi_desc;
 159 #ifdef CONFIG_SMP
 160         cpumask_var_t           affinity;
 161 #endif
 162 };
 163
 164 /*
 165  * Bit masks for irq_data.state
 166  *
 167  * IRQD_TRIGGER_MASK            - Mask for the trigger type bits
 168  * IRQD_SETAFFINITY_PENDING     - Affinity setting is pending
 169  * IRQD_NO_BALANCING            - Balancing disabled for this IRQ
 170  * IRQD_PER_CPU                 - Interrupt is per cpu
 171  * IRQD_AFFINITY_SET            - Interrupt affinity was set
 172  * IRQD_LEVEL                   - Interrupt is level triggered
 173  * IRQD_WAKEUP_STATE            - Interrupt is configured for wakeup
 174  *                                from suspend
 175  * IRDQ_MOVE_PCNTXT             - Interrupt can be moved in process
 176  *                                context
 177  * IRQD_IRQ_DISABLED            - Disabled state of the interrupt
 178  * IRQD_IRQ_MASKED              - Masked state of the interrupt
 179  * IRQD_IRQ_INPROGRESS          - In progress state of the interrupt
 180  */
 181 enum {
 182         IRQD_TRIGGER_MASK               = 0xf,
 183         IRQD_SETAFFINITY_PENDING        = (1 <<  8),
 184         IRQD_NO_BALANCING               = (1 << 10),
 185         IRQD_PER_CPU                    = (1 << 11),
 186         IRQD_AFFINITY_SET               = (1 << 12),
 187         IRQD_LEVEL                      = (1 << 13),
 188         IRQD_WAKEUP_STATE               = (1 << 14),
 189         IRQD_MOVE_PCNTXT                = (1 << 15),
 190         IRQD_IRQ_DISABLED               = (1 << 16),
 191         IRQD_IRQ_MASKED                 = (1 << 17),
 192         IRQD_IRQ_INPROGRESS             = (1 << 18),
 193 };
 194
 195 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
 196 {
 197         return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
 198 }
 199
 200 static inline bool irqd_is_per_cpu(struct irq_data *d)
 201 {
 202         return d->state_use_accessors & IRQD_PER_CPU;
 203 }
 204
 205 static inline bool irqd_can_balance(struct irq_data *d)
 206 {
 207         return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
 208 }
 209
 210 static inline bool irqd_affinity_was_set(struct irq_data *d)
 211 {
 212         return d->state_use_accessors & IRQD_AFFINITY_SET;
 213 }
 214
 215 static inline u32 irqd_get_trigger_type(struct irq_data *d)
 216 {
 217         return d->state_use_accessors & IRQD_TRIGGER_MASK;
 218 }
 219
 220 /*
 221  * Must only be called inside irq_chip.irq_set_type() functions.
 222  */
 223 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
 224 {
 225         d->state_use_accessors &= ~IRQD_TRIGGER_MASK;
 226         d->state_use_accessors |= type & IRQD_TRIGGER_MASK;
 227 }
 228
 229 static inline bool irqd_is_level_type(struct irq_data *d)
 230 {
 231         return d->state_use_accessors & IRQD_LEVEL;
 232 }
 233
 234 static inline bool irqd_is_wakeup_set(struct irq_data *d)
 235 {
 236         return d->state_use_accessors & IRQD_WAKEUP_STATE;
 237 }
 238
 239 static inline bool irqd_can_move_in_process_context(struct irq_data *d)
 240 {
 241         return d->state_use_accessors & IRQD_MOVE_PCNTXT;
 242 }
 243
 244 static inline bool irqd_irq_disabled(struct irq_data *d)
 245 {
 246         return d->state_use_accessors & IRQD_IRQ_DISABLED;
 247 }
 248
 249 static inline bool irqd_irq_masked(struct irq_data *d)
 250 {
 251         return d->state_use_accessors & IRQD_IRQ_MASKED;
 252 }
 253
 254 static inline bool irqd_irq_inprogress(struct irq_data *d)
 255 {
 256         return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
 257 }
 258
 259 /*
 260  * Functions for chained handlers which can be enabled/disabled by the
 261  * standard disable_irq/enable_irq calls. Must be called with
 262  * irq_desc->lock held.
 263  */
 264 static inline void irqd_set_chained_irq_inprogress(struct irq_data *d)
 265 {
 266         d->state_use_accessors |= IRQD_IRQ_INPROGRESS;
 267 }
 268
 269 static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
 270 {
 271         d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;
 272 }
 273
 274 /**
 275  * struct irq_chip - hardware interrupt chip descriptor
 276  *
 277  * @name:               name for /proc/interrupts
 278  * @startup:            deprecated, replaced by irq_startup
 279  * @shutdown:           deprecated, replaced by irq_shutdown
 280  * @enable:             deprecated, replaced by irq_enable
 281  * @disable:            deprecated, replaced by irq_disable
 282  * @ack:                deprecated, replaced by irq_ack
 283  * @mask:               deprecated, replaced by irq_mask
 284  * @mask_ack:           deprecated, replaced by irq_mask_ack
 285  * @unmask:             deprecated, replaced by irq_unmask
 286  * @eoi:                deprecated, replaced by irq_eoi
 287  * @end:                deprecated, will go away with __do_IRQ()
 288  * @set_affinity:       deprecated, replaced by irq_set_affinity
 289  * @retrigger:          deprecated, replaced by irq_retrigger
 290  * @set_type:           deprecated, replaced by irq_set_type
 291  * @set_wake:           deprecated, replaced by irq_wake
 292  * @bus_lock:           deprecated, replaced by irq_bus_lock
 293  * @bus_sync_unlock:    deprecated, replaced by irq_bus_sync_unlock
 294  *
 295  * @irq_startup:        start up the interrupt (defaults to ->enable if NULL)
 296  * @irq_shutdown:       shut down the interrupt (defaults to ->disable if NULL)
 297  * @irq_enable:         enable the interrupt (defaults to chip->unmask if NULL)
 298  * @irq_disable:        disable the interrupt
 299  * @irq_ack:            start of a new interrupt
 300  * @irq_mask:           mask an interrupt source
 301  * @irq_mask_ack:       ack and mask an interrupt source
 302  * @irq_unmask:         unmask an interrupt source
 303  * @irq_eoi:            end of interrupt
 304  * @irq_set_affinity:   set the CPU affinity on SMP machines
 305  * @irq_retrigger:      resend an IRQ to the CPU
 306  * @irq_set_type:       set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
 307  * @irq_set_wake:       enable/disable power-management wake-on of an IRQ
 308  * @irq_bus_lock:       function to lock access to slow bus (i2c) chips
 309  * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
 310  * @irq_cpu_online:     configure an interrupt source for a secondary CPU
 311  * @irq_cpu_offline:    un-configure an interrupt source for a secondary CPU
 312  * @irq_print_chip:     optional to print special chip info in show_interrupts
 313  * @flags:              chip specific flags
 314  *
 315  * @release:            release function solely used by UML
 316  */
 317 struct irq_chip {
 318         const char      *name;
 319 #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
 320         unsigned int    (*startup)(unsigned int irq);
 321         void            (*shutdown)(unsigned int irq);
 322         void            (*enable)(unsigned int irq);
 323         void            (*disable)(unsigned int irq);
 324
 325         void            (*ack)(unsigned int irq);
 326         void            (*mask)(unsigned int irq);
 327         void            (*mask_ack)(unsigned int irq);
 328         void            (*unmask)(unsigned int irq);
 329         void            (*eoi)(unsigned int irq);
 330
 331         void            (*end)(unsigned int irq);
 332         int             (*set_affinity)(unsigned int irq,
 333                                         const struct cpumask *dest);
 334         int             (*retrigger)(unsigned int irq);
 335         int             (*set_type)(unsigned int irq, unsigned int flow_type);
 336         int             (*set_wake)(unsigned int irq, unsigned int on);
 337
 338         void            (*bus_lock)(unsigned int irq);
 339         void            (*bus_sync_unlock)(unsigned int irq);
 340 #endif
 341         unsigned int    (*irq_startup)(struct irq_data *data);
 342         void            (*irq_shutdown)(struct irq_data *data);
 343         void            (*irq_enable)(struct irq_data *data);
 344         void            (*irq_disable)(struct irq_data *data);
 345
 346         void            (*irq_ack)(struct irq_data *data);
 347         void            (*irq_mask)(struct irq_data *data);
 348         void            (*irq_mask_ack)(struct irq_data *data);
 349         void            (*irq_unmask)(struct irq_data *data);
 350         void            (*irq_eoi)(struct irq_data *data);
 351
 352         int             (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
 353         int             (*irq_retrigger)(struct irq_data *data);
 354         int             (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
 355         int             (*irq_set_wake)(struct irq_data *data, unsigned int on);
 356
 357         void            (*irq_bus_lock)(struct irq_data *data);
 358         void            (*irq_bus_sync_unlock)(struct irq_data *data);
 359
 360         void            (*irq_cpu_online)(struct irq_data *data);
 361         void            (*irq_cpu_offline)(struct irq_data *data);
 362
 363         void            (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
 364
 365         unsigned long   flags;
 366
 367         /* Currently used only by UML, might disappear one day.*/
 368 #ifdef CONFIG_IRQ_RELEASE_METHOD
 369         void            (*release)(unsigned int irq, void *dev_id);
 370 #endif
 371 };
 372
 373 /*
 374  * irq_chip specific flags
 375  *
 376  * IRQCHIP_SET_TYPE_MASKED:     Mask before calling chip.irq_set_type()
 377  * IRQCHIP_EOI_IF_HANDLED:      Only issue irq_eoi() when irq was handled
 378  * IRQCHIP_MASK_ON_SUSPEND:     Mask non wake irqs in the suspend path
 379  * IRQCHIP_ONOFFLINE_ENABLED:   Only call irq_on/off_line callbacks
 380  *                              when irq enabled
 381  */
 382 enum {
 383         IRQCHIP_SET_TYPE_MASKED         = (1 <<  0),
 384         IRQCHIP_EOI_IF_HANDLED          = (1 <<  1),
 385         IRQCHIP_MASK_ON_SUSPEND         = (1 <<  2),
 386         IRQCHIP_ONOFFLINE_ENABLED       = (1 <<  3),
 387 };
 388
 389 /* This include will go away once we isolated irq_desc usage to core code */
 390 #include <linux/irqdesc.h>
 391
 392 /*
 393  * Pick up the arch-dependent methods:
 394  */
 395 #include <asm/hw_irq.h>
 396
 397 #ifndef NR_IRQS_LEGACY
 398 # define NR_IRQS_LEGACY 0
 399 #endif
 400
 401 #ifndef ARCH_IRQ_INIT_FLAGS
 402 # define ARCH_IRQ_INIT_FLAGS    0
 403 #endif
 404
 405 #define IRQ_DEFAULT_INIT_FLAGS  ARCH_IRQ_INIT_FLAGS
 406
 407 struct irqaction;
 408 extern int setup_irq(unsigned int irq, struct irqaction *new);
 409 extern void remove_irq(unsigned int irq, struct irqaction *act);
 410
 411 extern void irq_cpu_online(void);
 412 extern void irq_cpu_offline(void);
 413 extern int __irq_set_affinity_locked(struct irq_data *data,  const struct cpumask *cpumask);
 414
 415 #ifdef CONFIG_GENERIC_HARDIRQS
 416
 417 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
 418 void move_native_irq(int irq);
 419 void move_masked_irq(int irq);
 420 void irq_move_irq(struct irq_data *data);
 421 void irq_move_masked_irq(struct irq_data *data);
 422 #else
 423 static inline void move_native_irq(int irq) { }
 424 static inline void move_masked_irq(int irq) { }
 425 static inline void irq_move_irq(struct irq_data *data) { }
 426 static inline void irq_move_masked_irq(struct irq_data *data) { }
 427 #endif
 428
 429 extern int no_irq_affinity;
 430
 431 /*
 432  * Built-in IRQ handlers for various IRQ types,
 433  * callable via desc->handle_irq()
 434  */
 435 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
 436 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
 437 extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
 438 extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc);
 439 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
 440 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
 441 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
 442 extern void handle_nested_irq(unsigned int irq);
 443
 444 /* Handling of unhandled and spurious interrupts: */
 445 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
 446                            irqreturn_t action_ret);
 447
 448
 449 /* Enable/disable irq debugging output: */
 450 extern int noirqdebug_setup(char *str);
 451
 452 /* Checks whether the interrupt can be requested by request_irq(): */
 453 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
 454
 455 /* Dummy irq-chip implementations: */
 456 extern struct irq_chip no_irq_chip;
 457 extern struct irq_chip dummy_irq_chip;
 458
 459 extern void
 460 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
 461                               irq_flow_handler_t handle, const char *name);
 462
 463 static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip,
 464                                             irq_flow_handler_t handle)
 465 {
 466         irq_set_chip_and_handler_name(irq, chip, handle, NULL);
 467 }
 468
 469 extern void
 470 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 471                   const char *name);
 472
 473 static inline void
 474 irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
 475 {
 476         __irq_set_handler(irq, handle, 0, NULL);
 477 }
 478
 479 /*
 480  * Set a highlevel chained flow handler for a given IRQ.
 481  * (a chained handler is automatically enabled and set to
 482  *  IRQ_NOREQUEST and IRQ_NOPROBE)
 483  */
 484 static inline void
 485 irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
 486 {
 487         __irq_set_handler(irq, handle, 1, NULL);
 488 }
 489
 490 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
 491
 492 static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
 493 {
 494         irq_modify_status(irq, 0, set);
 495 }
 496
 497 static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
 498 {
 499         irq_modify_status(irq, clr, 0);
 500 }
 501
 502 static inline void irq_set_noprobe(unsigned int irq)
 503 {
 504         irq_modify_status(irq, 0, IRQ_NOPROBE);
 505 }
 506
 507 static inline void irq_set_probe(unsigned int irq)
 508 {
 509         irq_modify_status(irq, IRQ_NOPROBE, 0);
 510 }
 511
 512 static inline void irq_set_nested_thread(unsigned int irq, bool nest)
 513 {
 514         if (nest)
 515                 irq_set_status_flags(irq, IRQ_NESTED_THREAD);
 516         else
 517                 irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
 518 }
 519
 520 /* Handle dynamic irq creation and destruction */
 521 extern unsigned int create_irq_nr(unsigned int irq_want, int node);
 522 extern int create_irq(void);
 523 extern void destroy_irq(unsigned int irq);
 524
 525 /*
 526  * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
 527  * irq_free_desc instead.
 528  */
 529 extern void dynamic_irq_cleanup(unsigned int irq);
 530 static inline void dynamic_irq_init(unsigned int irq)
 531 {
 532         dynamic_irq_cleanup(irq);
 533 }
 534
 535 /* Set/get chip/data for an IRQ: */
 536 extern int irq_set_chip(unsigned int irq, struct irq_chip *chip);
 537 extern int irq_set_handler_data(unsigned int irq, void *data);
 538 extern int irq_set_chip_data(unsigned int irq, void *data);
 539 extern int irq_set_irq_type(unsigned int irq, unsigned int type);
 540 extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
 541 extern struct irq_data *irq_get_irq_data(unsigned int irq);
 542
 543 static inline struct irq_chip *irq_get_chip(unsigned int irq)
 544 {
 545         struct irq_data *d = irq_get_irq_data(irq);
 546         return d ? d->chip : NULL;
 547 }
 548
 549 static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
 550 {
 551         return d->chip;
 552 }
 553
 554 static inline void *irq_get_chip_data(unsigned int irq)
 555 {
 556         struct irq_data *d = irq_get_irq_data(irq);
 557         return d ? d->chip_data : NULL;
 558 }
 559
 560 static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
 561 {
 562         return d->chip_data;
 563 }
 564
 565 static inline void *irq_get_handler_data(unsigned int irq)
 566 {
 567         struct irq_data *d = irq_get_irq_data(irq);
 568         return d ? d->handler_data : NULL;
 569 }
 570
 571 static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
 572 {
 573         return d->handler_data;
 574 }
 575
 576 static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
 577 {
 578         struct irq_data *d = irq_get_irq_data(irq);
 579         return d ? d->msi_desc : NULL;
 580 }
 581
 582 static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
 583 {
 584         return d->msi_desc;
 585 }
 586
 587 #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
 588 /* Please do not use: Use the replacement functions instead */
 589 static inline int set_irq_chip(unsigned int irq, struct irq_chip *chip)
 590 {
 591         return irq_set_chip(irq, chip);
 592 }
 593 static inline int set_irq_data(unsigned int irq, void *data)
 594 {
 595         return irq_set_handler_data(irq, data);
 596 }
 597 static inline int set_irq_chip_data(unsigned int irq, void *data)
 598 {
 599         return irq_set_chip_data(irq, data);
 600 }
 601 static inline int set_irq_type(unsigned int irq, unsigned int type)
 602 {
 603         return irq_set_irq_type(irq, type);
 604 }
 605 static inline int set_irq_msi(unsigned int irq, struct msi_desc *entry)
 606 {
 607         return irq_set_msi_desc(irq, entry);
 608 }
 609 static inline struct irq_chip *get_irq_chip(unsigned int irq)
 610 {
 611         return irq_get_chip(irq);
 612 }
 613 static inline void *get_irq_chip_data(unsigned int irq)
 614 {
 615         return irq_get_chip_data(irq);
 616 }
 617 static inline void *get_irq_data(unsigned int irq)
 618 {
 619         return irq_get_handler_data(irq);
 620 }
 621 static inline void *irq_data_get_irq_data(struct irq_data *d)
 622 {
 623         return irq_data_get_irq_handler_data(d);
 624 }
 625 static inline struct msi_desc *get_irq_msi(unsigned int irq)
 626 {
 627         return irq_get_msi_desc(irq);
 628 }
 629 static inline void set_irq_noprobe(unsigned int irq)
 630 {
 631         irq_set_noprobe(irq);
 632 }
 633 static inline void set_irq_probe(unsigned int irq)
 634 {
 635         irq_set_probe(irq);
 636 }
 637 static inline void set_irq_nested_thread(unsigned int irq, int nest)
 638 {
 639         irq_set_nested_thread(irq, nest);
 640 }
 641 static inline void
 642 set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
 643                               irq_flow_handler_t handle, const char *name)
 644 {
 645         irq_set_chip_and_handler_name(irq, chip, handle, name);
 646 }
 647 static inline void
 648 set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
 649                          irq_flow_handler_t handle)
 650 {
 651         irq_set_chip_and_handler(irq, chip, handle);
 652 }
 653 static inline void
 654 __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 655                   const char *name)
 656 {
 657         __irq_set_handler(irq, handle, is_chained, name);
 658 }
 659 static inline void set_irq_handler(unsigned int irq, irq_flow_handler_t handle)
 660 {
 661         irq_set_handler(irq, handle);
 662 }
 663 static inline void
 664 set_irq_chained_handler(unsigned int irq, irq_flow_handler_t handle)
 665 {
 666         irq_set_chained_handler(irq, handle);
 667 }
 668 #endif
 669
 670 int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node);
 671 void irq_free_descs(unsigned int irq, unsigned int cnt);
 672 int irq_reserve_irqs(unsigned int from, unsigned int cnt);
 673
 674 static inline int irq_alloc_desc(int node)
 675 {
 676         return irq_alloc_descs(-1, 0, 1, node);
 677 }
 678
 679 static inline int irq_alloc_desc_at(unsigned int at, int node)
 680 {
 681         return irq_alloc_descs(at, at, 1, node);
 682 }
 683
 684 static inline int irq_alloc_desc_from(unsigned int from, int node)
 685 {
 686         return irq_alloc_descs(-1, from, 1, node);
 687 }
 688
 689 static inline void irq_free_desc(unsigned int irq)
 690 {
 691         irq_free_descs(irq, 1);
 692 }
 693
 694 static inline int irq_reserve_irq(unsigned int irq)
 695 {
 696         return irq_reserve_irqs(irq, 1);
 697 }
 698
 699 #endif /* CONFIG_GENERIC_HARDIRQS */
 700
 701 #endif /* !CONFIG_S390 */
 702
 703 #endif /* _LINUX_IRQ_H */