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            - Some chip function need to know the
 178  *                                disabled state.
 179  */
 180 enum {
 181         IRQD_TRIGGER_MASK               = 0xf,
 182         IRQD_SETAFFINITY_PENDING        = (1 <<  8),
 183         IRQD_NO_BALANCING               = (1 << 10),
 184         IRQD_PER_CPU                    = (1 << 11),
 185         IRQD_AFFINITY_SET               = (1 << 12),
 186         IRQD_LEVEL                      = (1 << 13),
 187         IRQD_WAKEUP_STATE               = (1 << 14),
 188         IRQD_MOVE_PCNTXT                = (1 << 15),
 189         IRQD_IRQ_DISABLED               = (1 << 16),
 190 };
 191
 192 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
 193 {
 194         return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
 195 }
 196
 197 static inline bool irqd_is_per_cpu(struct irq_data *d)
 198 {
 199         return d->state_use_accessors & IRQD_PER_CPU;
 200 }
 201
 202 static inline bool irqd_can_balance(struct irq_data *d)
 203 {
 204         return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
 205 }
 206
 207 static inline bool irqd_affinity_was_set(struct irq_data *d)
 208 {
 209         return d->state_use_accessors & IRQD_AFFINITY_SET;
 210 }
 211
 212 static inline u32 irqd_get_trigger_type(struct irq_data *d)
 213 {
 214         return d->state_use_accessors & IRQD_TRIGGER_MASK;
 215 }
 216
 217 /*
 218  * Must only be called inside irq_chip.irq_set_type() functions.
 219  */
 220 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
 221 {
 222         d->state_use_accessors &= ~IRQD_TRIGGER_MASK;
 223         d->state_use_accessors |= type & IRQD_TRIGGER_MASK;
 224 }
 225
 226 static inline bool irqd_is_level_type(struct irq_data *d)
 227 {
 228         return d->state_use_accessors & IRQD_LEVEL;
 229 }
 230
 231 static inline bool irqd_is_wakeup_set(struct irq_data *d)
 232 {
 233         return d->state_use_accessors & IRQD_WAKEUP_STATE;
 234 }
 235
 236 static inline bool irqd_can_move_in_process_context(struct irq_data *d)
 237 {
 238         return d->state_use_accessors & IRQD_MOVE_PCNTXT;
 239 }
 240
 241 static inline bool irqd_irq_disabled(struct irq_data *d)
 242 {
 243         return d->state_use_accessors & IRQD_IRQ_DISABLED;
 244 }
 245
 246 /**
 247  * struct irq_chip - hardware interrupt chip descriptor
 248  *
 249  * @name:               name for /proc/interrupts
 250  * @startup:            deprecated, replaced by irq_startup
 251  * @shutdown:           deprecated, replaced by irq_shutdown
 252  * @enable:             deprecated, replaced by irq_enable
 253  * @disable:            deprecated, replaced by irq_disable
 254  * @ack:                deprecated, replaced by irq_ack
 255  * @mask:               deprecated, replaced by irq_mask
 256  * @mask_ack:           deprecated, replaced by irq_mask_ack
 257  * @unmask:             deprecated, replaced by irq_unmask
 258  * @eoi:                deprecated, replaced by irq_eoi
 259  * @end:                deprecated, will go away with __do_IRQ()
 260  * @set_affinity:       deprecated, replaced by irq_set_affinity
 261  * @retrigger:          deprecated, replaced by irq_retrigger
 262  * @set_type:           deprecated, replaced by irq_set_type
 263  * @set_wake:           deprecated, replaced by irq_wake
 264  * @bus_lock:           deprecated, replaced by irq_bus_lock
 265  * @bus_sync_unlock:    deprecated, replaced by irq_bus_sync_unlock
 266  *
 267  * @irq_startup:        start up the interrupt (defaults to ->enable if NULL)
 268  * @irq_shutdown:       shut down the interrupt (defaults to ->disable if NULL)
 269  * @irq_enable:         enable the interrupt (defaults to chip->unmask if NULL)
 270  * @irq_disable:        disable the interrupt
 271  * @irq_ack:            start of a new interrupt
 272  * @irq_mask:           mask an interrupt source
 273  * @irq_mask_ack:       ack and mask an interrupt source
 274  * @irq_unmask:         unmask an interrupt source
 275  * @irq_eoi:            end of interrupt
 276  * @irq_set_affinity:   set the CPU affinity on SMP machines
 277  * @irq_retrigger:      resend an IRQ to the CPU
 278  * @irq_set_type:       set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
 279  * @irq_set_wake:       enable/disable power-management wake-on of an IRQ
 280  * @irq_bus_lock:       function to lock access to slow bus (i2c) chips
 281  * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
 282  * @irq_cpu_online:     configure an interrupt source for a secondary CPU
 283  * @irq_cpu_offline:    un-configure an interrupt source for a secondary CPU
 284  * @irq_print_chip:     optional to print special chip info in show_interrupts
 285  * @flags:              chip specific flags
 286  *
 287  * @release:            release function solely used by UML
 288  */
 289 struct irq_chip {
 290         const char      *name;
 291 #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
 292         unsigned int    (*startup)(unsigned int irq);
 293         void            (*shutdown)(unsigned int irq);
 294         void            (*enable)(unsigned int irq);
 295         void            (*disable)(unsigned int irq);
 296
 297         void            (*ack)(unsigned int irq);
 298         void            (*mask)(unsigned int irq);
 299         void            (*mask_ack)(unsigned int irq);
 300         void            (*unmask)(unsigned int irq);
 301         void            (*eoi)(unsigned int irq);
 302
 303         void            (*end)(unsigned int irq);
 304         int             (*set_affinity)(unsigned int irq,
 305                                         const struct cpumask *dest);
 306         int             (*retrigger)(unsigned int irq);
 307         int             (*set_type)(unsigned int irq, unsigned int flow_type);
 308         int             (*set_wake)(unsigned int irq, unsigned int on);
 309
 310         void            (*bus_lock)(unsigned int irq);
 311         void            (*bus_sync_unlock)(unsigned int irq);
 312 #endif
 313         unsigned int    (*irq_startup)(struct irq_data *data);
 314         void            (*irq_shutdown)(struct irq_data *data);
 315         void            (*irq_enable)(struct irq_data *data);
 316         void            (*irq_disable)(struct irq_data *data);
 317
 318         void            (*irq_ack)(struct irq_data *data);
 319         void            (*irq_mask)(struct irq_data *data);
 320         void            (*irq_mask_ack)(struct irq_data *data);
 321         void            (*irq_unmask)(struct irq_data *data);
 322         void            (*irq_eoi)(struct irq_data *data);
 323
 324         int             (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
 325         int             (*irq_retrigger)(struct irq_data *data);
 326         int             (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
 327         int             (*irq_set_wake)(struct irq_data *data, unsigned int on);
 328
 329         void            (*irq_bus_lock)(struct irq_data *data);
 330         void            (*irq_bus_sync_unlock)(struct irq_data *data);
 331
 332         void            (*irq_cpu_online)(struct irq_data *data);
 333         void            (*irq_cpu_offline)(struct irq_data *data);
 334
 335         void            (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
 336
 337         unsigned long   flags;
 338
 339         /* Currently used only by UML, might disappear one day.*/
 340 #ifdef CONFIG_IRQ_RELEASE_METHOD
 341         void            (*release)(unsigned int irq, void *dev_id);
 342 #endif
 343 };
 344
 345 /*
 346  * irq_chip specific flags
 347  *
 348  * IRQCHIP_SET_TYPE_MASKED:     Mask before calling chip.irq_set_type()
 349  * IRQCHIP_EOI_IF_HANDLED:      Only issue irq_eoi() when irq was handled
 350  * IRQCHIP_MASK_ON_SUSPEND:     Mask non wake irqs in the suspend path
 351  */
 352 enum {
 353         IRQCHIP_SET_TYPE_MASKED         = (1 <<  0),
 354         IRQCHIP_EOI_IF_HANDLED          = (1 <<  1),
 355         IRQCHIP_MASK_ON_SUSPEND         = (1 <<  2),
 356 };
 357
 358 /* This include will go away once we isolated irq_desc usage to core code */
 359 #include <linux/irqdesc.h>
 360
 361 /*
 362  * Pick up the arch-dependent methods:
 363  */
 364 #include <asm/hw_irq.h>
 365
 366 #ifndef NR_IRQS_LEGACY
 367 # define NR_IRQS_LEGACY 0
 368 #endif
 369
 370 #ifndef ARCH_IRQ_INIT_FLAGS
 371 # define ARCH_IRQ_INIT_FLAGS    0
 372 #endif
 373
 374 #define IRQ_DEFAULT_INIT_FLAGS  ARCH_IRQ_INIT_FLAGS
 375
 376 struct irqaction;
 377 extern int setup_irq(unsigned int irq, struct irqaction *new);
 378 extern void remove_irq(unsigned int irq, struct irqaction *act);
 379
 380 extern void irq_cpu_online(void);
 381 extern void irq_cpu_offline(void);
 382
 383 #ifdef CONFIG_GENERIC_HARDIRQS
 384
 385 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
 386 void move_native_irq(int irq);
 387 void move_masked_irq(int irq);
 388 void irq_move_irq(struct irq_data *data);
 389 void irq_move_masked_irq(struct irq_data *data);
 390 #else
 391 static inline void move_native_irq(int irq) { }
 392 static inline void move_masked_irq(int irq) { }
 393 static inline void irq_move_irq(struct irq_data *data) { }
 394 static inline void irq_move_masked_irq(struct irq_data *data) { }
 395 #endif
 396
 397 extern int no_irq_affinity;
 398
 399 /* Handle irq action chains: */
 400 extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action);
 401
 402 /*
 403  * Built-in IRQ handlers for various IRQ types,
 404  * callable via desc->handle_irq()
 405  */
 406 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
 407 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
 408 extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
 409 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
 410 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
 411 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
 412 extern void handle_nested_irq(unsigned int irq);
 413
 414 /* Handling of unhandled and spurious interrupts: */
 415 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
 416                            irqreturn_t action_ret);
 417
 418
 419 /* Enable/disable irq debugging output: */
 420 extern int noirqdebug_setup(char *str);
 421
 422 /* Checks whether the interrupt can be requested by request_irq(): */
 423 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
 424
 425 /* Dummy irq-chip implementations: */
 426 extern struct irq_chip no_irq_chip;
 427 extern struct irq_chip dummy_irq_chip;
 428
 429 extern void
 430 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
 431                               irq_flow_handler_t handle, const char *name);
 432
 433 static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip,
 434                                             irq_flow_handler_t handle)
 435 {
 436         irq_set_chip_and_handler_name(irq, chip, handle, NULL);
 437 }
 438
 439 extern void
 440 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 441                   const char *name);
 442
 443 static inline void
 444 irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
 445 {
 446         __irq_set_handler(irq, handle, 0, NULL);
 447 }
 448
 449 /*
 450  * Set a highlevel chained flow handler for a given IRQ.
 451  * (a chained handler is automatically enabled and set to
 452  *  IRQ_NOREQUEST and IRQ_NOPROBE)
 453  */
 454 static inline void
 455 irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
 456 {
 457         __irq_set_handler(irq, handle, 1, NULL);
 458 }
 459
 460 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
 461
 462 static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
 463 {
 464         irq_modify_status(irq, 0, set);
 465 }
 466
 467 static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
 468 {
 469         irq_modify_status(irq, clr, 0);
 470 }
 471
 472 static inline void irq_set_noprobe(unsigned int irq)
 473 {
 474         irq_modify_status(irq, 0, IRQ_NOPROBE);
 475 }
 476
 477 static inline void irq_set_probe(unsigned int irq)
 478 {
 479         irq_modify_status(irq, IRQ_NOPROBE, 0);
 480 }
 481
 482 static inline void irq_set_nested_thread(unsigned int irq, bool nest)
 483 {
 484         if (nest)
 485                 irq_set_status_flags(irq, IRQ_NESTED_THREAD);
 486         else
 487                 irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
 488 }
 489
 490 /* Handle dynamic irq creation and destruction */
 491 extern unsigned int create_irq_nr(unsigned int irq_want, int node);
 492 extern int create_irq(void);
 493 extern void destroy_irq(unsigned int irq);
 494
 495 /*
 496  * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
 497  * irq_free_desc instead.
 498  */
 499 extern void dynamic_irq_cleanup(unsigned int irq);
 500 static inline void dynamic_irq_init(unsigned int irq)
 501 {
 502         dynamic_irq_cleanup(irq);
 503 }
 504
 505 /* Set/get chip/data for an IRQ: */
 506 extern int irq_set_chip(unsigned int irq, struct irq_chip *chip);
 507 extern int irq_set_handler_data(unsigned int irq, void *data);
 508 extern int irq_set_chip_data(unsigned int irq, void *data);
 509 extern int irq_set_irq_type(unsigned int irq, unsigned int type);
 510 extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
 511 extern struct irq_data *irq_get_irq_data(unsigned int irq);
 512
 513 static inline struct irq_chip *irq_get_chip(unsigned int irq)
 514 {
 515         struct irq_data *d = irq_get_irq_data(irq);
 516         return d ? d->chip : NULL;
 517 }
 518
 519 static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
 520 {
 521         return d->chip;
 522 }
 523
 524 static inline void *irq_get_chip_data(unsigned int irq)
 525 {
 526         struct irq_data *d = irq_get_irq_data(irq);
 527         return d ? d->chip_data : NULL;
 528 }
 529
 530 static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
 531 {
 532         return d->chip_data;
 533 }
 534
 535 static inline void *irq_get_handler_data(unsigned int irq)
 536 {
 537         struct irq_data *d = irq_get_irq_data(irq);
 538         return d ? d->handler_data : NULL;
 539 }
 540
 541 static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
 542 {
 543         return d->handler_data;
 544 }
 545
 546 static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
 547 {
 548         struct irq_data *d = irq_get_irq_data(irq);
 549         return d ? d->msi_desc : NULL;
 550 }
 551
 552 static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
 553 {
 554         return d->msi_desc;
 555 }
 556
 557 #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
 558 /* Please do not use: Use the replacement functions instead */
 559 static inline int set_irq_chip(unsigned int irq, struct irq_chip *chip)
 560 {
 561         return irq_set_chip(irq, chip);
 562 }
 563 static inline int set_irq_data(unsigned int irq, void *data)
 564 {
 565         return irq_set_handler_data(irq, data);
 566 }
 567 static inline int set_irq_chip_data(unsigned int irq, void *data)
 568 {
 569         return irq_set_chip_data(irq, data);
 570 }
 571 static inline int set_irq_type(unsigned int irq, unsigned int type)
 572 {
 573         return irq_set_irq_type(irq, type);
 574 }
 575 static inline int set_irq_msi(unsigned int irq, struct msi_desc *entry)
 576 {
 577         return irq_set_msi_desc(irq, entry);
 578 }
 579 static inline struct irq_chip *get_irq_chip(unsigned int irq)
 580 {
 581         return irq_get_chip(irq);
 582 }
 583 static inline void *get_irq_chip_data(unsigned int irq)
 584 {
 585         return irq_get_chip_data(irq);
 586 }
 587 static inline void *get_irq_data(unsigned int irq)
 588 {
 589         return irq_get_handler_data(irq);
 590 }
 591 static inline void *irq_data_get_irq_data(struct irq_data *d)
 592 {
 593         return irq_data_get_irq_handler_data(d);
 594 }
 595 static inline struct msi_desc *get_irq_msi(unsigned int irq)
 596 {
 597         return irq_get_msi_desc(irq);
 598 }
 599 static inline void set_irq_noprobe(unsigned int irq)
 600 {
 601         irq_set_noprobe(irq);
 602 }
 603 static inline void set_irq_probe(unsigned int irq)
 604 {
 605         irq_set_probe(irq);
 606 }
 607 static inline void set_irq_nested_thread(unsigned int irq, int nest)
 608 {
 609         irq_set_nested_thread(irq, nest);
 610 }
 611 static inline void
 612 set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
 613                               irq_flow_handler_t handle, const char *name)
 614 {
 615         irq_set_chip_and_handler_name(irq, chip, handle, name);
 616 }
 617 static inline void
 618 set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
 619                          irq_flow_handler_t handle)
 620 {
 621         irq_set_chip_and_handler(irq, chip, handle);
 622 }
 623 static inline void
 624 __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 625                   const char *name)
 626 {
 627         __irq_set_handler(irq, handle, is_chained, name);
 628 }
 629 static inline void set_irq_handler(unsigned int irq, irq_flow_handler_t handle)
 630 {
 631         irq_set_handler(irq, handle);
 632 }
 633 static inline void
 634 set_irq_chained_handler(unsigned int irq, irq_flow_handler_t handle)
 635 {
 636         irq_set_chained_handler(irq, handle);
 637 }
 638 #endif
 639
 640 int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node);
 641 void irq_free_descs(unsigned int irq, unsigned int cnt);
 642 int irq_reserve_irqs(unsigned int from, unsigned int cnt);
 643
 644 static inline int irq_alloc_desc(int node)
 645 {
 646         return irq_alloc_descs(-1, 0, 1, node);
 647 }
 648
 649 static inline int irq_alloc_desc_at(unsigned int at, int node)
 650 {
 651         return irq_alloc_descs(at, at, 1, node);
 652 }
 653
 654 static inline int irq_alloc_desc_from(unsigned int from, int node)
 655 {
 656         return irq_alloc_descs(-1, from, 1, node);
 657 }
 658
 659 static inline void irq_free_desc(unsigned int irq)
 660 {
 661         irq_free_descs(irq, 1);
 662 }
 663
 664 static inline int irq_reserve_irq(unsigned int irq)
 665 {
 666         return irq_reserve_irqs(irq, 1);
 667 }
 668
 669 #endif /* CONFIG_GENERIC_HARDIRQS */
 670
 671 #endif /* !CONFIG_S390 */
 672
 673 #endif /* _LINUX_IRQ_H */