2 * Copyright (c) 1997,1998,2003 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <machine/_limits.h>
33 #include <machine/_bus.h>
34 #include <sys/_bus_dma.h>
35 #include <sys/ioccom.h>
38 * @defgroup NEWBUS newbus - a generic framework for managing devices
43 * @brief Interface information structure.
46 int ub_version; /**< @brief interface version */
47 #define BUS_USER_VERSION 1
48 int ub_generation; /**< @brief generation count */
52 * @brief State of the device.
54 typedef enum device_state {
55 DS_NOTPRESENT = 10, /**< @brief not probed or probe failed */
56 DS_ALIVE = 20, /**< @brief probe succeeded */
57 DS_ATTACHING = 25, /**< @brief currently attaching */
58 DS_ATTACHED = 30, /**< @brief attach method called */
59 DS_BUSY = 40 /**< @brief device is open */
63 * @brief Device information exported to userspace.
69 char dv_name[32]; /**< @brief Name of device in tree. */
70 char dv_desc[32]; /**< @brief Driver description */
71 char dv_drivername[32]; /**< @brief Driver name */
72 char dv_pnpinfo[128]; /**< @brief Plug and play info */
73 char dv_location[128]; /**< @brief Where is the device? */
74 uint32_t dv_devflags; /**< @brief API Flags for device */
75 uint16_t dv_flags; /**< @brief flags for dev state */
76 device_state_t dv_state; /**< @brief State of attachment */
77 /* XXX more driver info? */
80 /* Flags exported via dv_flags. */
81 #define DF_ENABLED 0x01 /* device should be probed/attached */
82 #define DF_FIXEDCLASS 0x02 /* devclass specified at create time */
83 #define DF_WILDCARD 0x04 /* unit was originally wildcard */
84 #define DF_DESCMALLOCED 0x08 /* description was malloced */
85 #define DF_QUIET 0x10 /* don't print verbose attach message */
86 #define DF_DONENOMATCH 0x20 /* don't execute DEVICE_NOMATCH again */
87 #define DF_EXTERNALSOFTC 0x40 /* softc not allocated by us */
88 #define DF_REBID 0x80 /* Can rebid after attach */
89 #define DF_SUSPENDED 0x100 /* Device is suspended. */
92 * @brief Device request structure used for ioctl's.
94 * Used for ioctl's on /dev/devctl2. All device ioctl's
95 * must have parameter definitions which begin with dr_name.
97 struct devreq_buffer {
104 int dr_flags; /* request-specific flags */
106 struct devreq_buffer dru_buffer;
109 #define dr_buffer dr_dru.dru_buffer /* variable-sized buffer */
110 #define dr_data dr_dru.dru_data /* fixed-size buffer */
113 #define DEV_ATTACH _IOW('D', 1, struct devreq)
114 #define DEV_DETACH _IOW('D', 2, struct devreq)
115 #define DEV_ENABLE _IOW('D', 3, struct devreq)
116 #define DEV_DISABLE _IOW('D', 4, struct devreq)
117 #define DEV_SUSPEND _IOW('D', 5, struct devreq)
118 #define DEV_RESUME _IOW('D', 6, struct devreq)
119 #define DEV_SET_DRIVER _IOW('D', 7, struct devreq)
121 /* Flags for DEV_DETACH and DEV_DISABLE. */
122 #define DEVF_FORCE_DETACH 0x0000001
124 /* Flags for DEV_SET_DRIVER. */
125 #define DEVF_SET_DRIVER_DETACH 0x0000001 /* Detach existing driver. */
129 #include <sys/eventhandler.h>
130 #include <sys/kobj.h>
133 * devctl hooks. Typically one should use the devctl_notify
134 * hook to send the message. However, devctl_queue_data is also
135 * included in case devctl_notify isn't sufficiently general.
137 boolean_t devctl_process_running(void);
138 void devctl_notify_f(const char *__system, const char *__subsystem,
139 const char *__type, const char *__data, int __flags);
140 void devctl_notify(const char *__system, const char *__subsystem,
141 const char *__type, const char *__data);
142 void devctl_queue_data_f(char *__data, int __flags);
143 void devctl_queue_data(char *__data);
146 * Device name parsers. Hook to allow device enumerators to map
147 * scheme-specific names to a device.
149 typedef void (*dev_lookup_fn)(void *arg, const char *name,
151 EVENTHANDLER_DECLARE(dev_lookup, dev_lookup_fn);
154 * @brief A device driver (included mainly for compatibility with
157 typedef struct kobj_class driver_t;
160 * @brief A device class
162 * The devclass object has two main functions in the system. The first
163 * is to manage the allocation of unit numbers for device instances
164 * and the second is to hold the list of device drivers for a
165 * particular bus type. Each devclass has a name and there cannot be
166 * two devclasses with the same name. This ensures that unique unit
167 * numbers are allocated to device instances.
169 * Drivers that support several different bus attachments (e.g. isa,
170 * pci, pccard) should all use the same devclass to ensure that unit
171 * numbers do not conflict.
173 * Each devclass may also have a parent devclass. This is used when
174 * searching for device drivers to allow a form of inheritance. When
175 * matching drivers with devices, first the driver list of the parent
176 * device's devclass is searched. If no driver is found in that list,
177 * the search continues in the parent devclass (if any).
179 typedef struct devclass *devclass_t;
182 * @brief A device method
184 #define device_method_t kobj_method_t
187 * @brief Driver interrupt filter return values
189 * If a driver provides an interrupt filter routine it must return an
190 * integer consisting of oring together zero or more of the following
193 * FILTER_STRAY - this device did not trigger the interrupt
194 * FILTER_HANDLED - the interrupt has been fully handled and can be EOId
195 * FILTER_SCHEDULE_THREAD - the threaded interrupt handler should be
196 * scheduled to execute
198 * If the driver does not provide a filter, then the interrupt code will
199 * act is if the filter had returned FILTER_SCHEDULE_THREAD. Note that it
200 * is illegal to specify any other flag with FILTER_STRAY and that it is
201 * illegal to not specify either of FILTER_HANDLED or FILTER_SCHEDULE_THREAD
202 * if FILTER_STRAY is not specified.
204 #define FILTER_STRAY 0x01
205 #define FILTER_HANDLED 0x02
206 #define FILTER_SCHEDULE_THREAD 0x04
209 * @brief Driver interrupt service routines
211 * The filter routine is run in primary interrupt context and may not
212 * block or use regular mutexes. It may only use spin mutexes for
213 * synchronization. The filter may either completely handle the
214 * interrupt or it may perform some of the work and defer more
215 * expensive work to the regular interrupt handler. If a filter
216 * routine is not registered by the driver, then the regular interrupt
217 * handler is always used to handle interrupts from this device.
219 * The regular interrupt handler executes in its own thread context
220 * and may use regular mutexes. However, it is prohibited from
221 * sleeping on a sleep queue.
223 typedef int driver_filter_t(void*);
224 typedef void driver_intr_t(void*);
227 * @brief Interrupt type bits.
229 * These flags are used both by newbus interrupt
230 * registration (nexus.c) and also in struct intrec, which defines
231 * interrupt properties.
233 * XXX We should probably revisit this and remove the vestiges of the
234 * spls implicit in names like INTR_TYPE_TTY. In the meantime, don't
235 * confuse things by renaming them (Grog, 18 July 2000).
237 * Buses which do interrupt remapping will want to change their type
238 * to reflect what sort of devices are underneath.
248 INTR_EXCL = 256, /* exclusive interrupt */
249 INTR_MPSAFE = 512, /* this interrupt is SMP safe */
250 INTR_ENTROPY = 1024, /* this interrupt provides entropy */
251 INTR_MD1 = 4096, /* flag reserved for MD use */
252 INTR_MD2 = 8192, /* flag reserved for MD use */
253 INTR_MD3 = 16384, /* flag reserved for MD use */
254 INTR_MD4 = 32768 /* flag reserved for MD use */
258 INTR_TRIGGER_CONFORM = 0,
259 INTR_TRIGGER_EDGE = 1,
260 INTR_TRIGGER_LEVEL = 2
264 INTR_POLARITY_CONFORM = 0,
265 INTR_POLARITY_HIGH = 1,
266 INTR_POLARITY_LOW = 2
269 typedef int (*devop_t)(void);
272 * @brief This structure is deprecated.
274 * Use the kobj(9) macro DEFINE_CLASS to
275 * declare classes which implement device drivers.
282 * Definitions for drivers which need to keep simple lists of resources
283 * for their child devices.
288 * @brief An entry for a single resource in a resource list.
290 struct resource_list_entry {
291 STAILQ_ENTRY(resource_list_entry) link;
292 int type; /**< @brief type argument to alloc_resource */
293 int rid; /**< @brief resource identifier */
294 int flags; /**< @brief resource flags */
295 struct resource *res; /**< @brief the real resource when allocated */
296 rman_res_t start; /**< @brief start of resource range */
297 rman_res_t end; /**< @brief end of resource range */
298 rman_res_t count; /**< @brief count within range */
300 STAILQ_HEAD(resource_list, resource_list_entry);
302 #define RLE_RESERVED 0x0001 /* Reserved by the parent bus. */
303 #define RLE_ALLOCATED 0x0002 /* Reserved resource is allocated. */
304 #define RLE_PREFETCH 0x0004 /* Resource is a prefetch range. */
306 void resource_list_init(struct resource_list *rl);
307 void resource_list_free(struct resource_list *rl);
308 struct resource_list_entry *
309 resource_list_add(struct resource_list *rl,
311 rman_res_t start, rman_res_t end, rman_res_t count);
312 int resource_list_add_next(struct resource_list *rl,
314 rman_res_t start, rman_res_t end, rman_res_t count);
315 int resource_list_busy(struct resource_list *rl,
317 int resource_list_reserved(struct resource_list *rl, int type, int rid);
318 struct resource_list_entry*
319 resource_list_find(struct resource_list *rl,
321 void resource_list_delete(struct resource_list *rl,
324 resource_list_alloc(struct resource_list *rl,
325 device_t bus, device_t child,
327 rman_res_t start, rman_res_t end,
328 rman_res_t count, u_int flags);
329 int resource_list_release(struct resource_list *rl,
330 device_t bus, device_t child,
331 int type, int rid, struct resource *res);
332 int resource_list_release_active(struct resource_list *rl,
333 device_t bus, device_t child,
336 resource_list_reserve(struct resource_list *rl,
337 device_t bus, device_t child,
339 rman_res_t start, rman_res_t end,
340 rman_res_t count, u_int flags);
341 int resource_list_unreserve(struct resource_list *rl,
342 device_t bus, device_t child,
344 void resource_list_purge(struct resource_list *rl);
345 int resource_list_print_type(struct resource_list *rl,
346 const char *name, int type,
350 * The root bus, to which all top-level busses are attached.
352 extern device_t root_bus;
353 extern devclass_t root_devclass;
354 void root_bus_configure(void);
357 * Useful functions for implementing busses.
360 int bus_generic_activate_resource(device_t dev, device_t child, int type,
361 int rid, struct resource *r);
363 bus_generic_add_child(device_t dev, u_int order, const char *name,
365 int bus_generic_adjust_resource(device_t bus, device_t child, int type,
366 struct resource *r, rman_res_t start,
369 bus_generic_alloc_resource(device_t bus, device_t child, int type,
370 int *rid, rman_res_t start, rman_res_t end,
371 rman_res_t count, u_int flags);
372 int bus_generic_attach(device_t dev);
373 int bus_generic_bind_intr(device_t dev, device_t child,
374 struct resource *irq, int cpu);
375 int bus_generic_child_present(device_t dev, device_t child);
376 int bus_generic_config_intr(device_t, int, enum intr_trigger,
378 int bus_generic_describe_intr(device_t dev, device_t child,
379 struct resource *irq, void *cookie,
381 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
382 int rid, struct resource *r);
383 int bus_generic_detach(device_t dev);
384 void bus_generic_driver_added(device_t dev, driver_t *driver);
386 bus_generic_get_dma_tag(device_t dev, device_t child);
388 bus_generic_get_bus_tag(device_t dev, device_t child);
389 int bus_generic_get_domain(device_t dev, device_t child, int *domain);
390 struct resource_list *
391 bus_generic_get_resource_list (device_t, device_t);
392 void bus_generic_new_pass(device_t dev);
393 int bus_print_child_header(device_t dev, device_t child);
394 int bus_print_child_domain(device_t dev, device_t child);
395 int bus_print_child_footer(device_t dev, device_t child);
396 int bus_generic_print_child(device_t dev, device_t child);
397 int bus_generic_probe(device_t dev);
398 int bus_generic_read_ivar(device_t dev, device_t child, int which,
400 int bus_generic_release_resource(device_t bus, device_t child,
401 int type, int rid, struct resource *r);
402 int bus_generic_resume(device_t dev);
403 int bus_generic_resume_child(device_t dev, device_t child);
404 int bus_generic_setup_intr(device_t dev, device_t child,
405 struct resource *irq, int flags,
406 driver_filter_t *filter, driver_intr_t *intr,
407 void *arg, void **cookiep);
410 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
411 rman_res_t, rman_res_t, rman_res_t, u_int);
412 void bus_generic_rl_delete_resource (device_t, device_t, int, int);
413 int bus_generic_rl_get_resource (device_t, device_t, int, int, rman_res_t *,
415 int bus_generic_rl_set_resource (device_t, device_t, int, int, rman_res_t,
417 int bus_generic_rl_release_resource (device_t, device_t, int, int,
420 int bus_generic_shutdown(device_t dev);
421 int bus_generic_suspend(device_t dev);
422 int bus_generic_suspend_child(device_t dev, device_t child);
423 int bus_generic_teardown_intr(device_t dev, device_t child,
424 struct resource *irq, void *cookie);
425 int bus_generic_write_ivar(device_t dev, device_t child, int which,
429 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
433 struct resource_spec {
439 int bus_alloc_resources(device_t dev, struct resource_spec *rs,
440 struct resource **res);
441 void bus_release_resources(device_t dev, const struct resource_spec *rs,
442 struct resource **res);
444 int bus_adjust_resource(device_t child, int type, struct resource *r,
445 rman_res_t start, rman_res_t end);
446 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
447 rman_res_t start, rman_res_t end,
448 rman_res_t count, u_int flags);
449 int bus_activate_resource(device_t dev, int type, int rid,
451 int bus_deactivate_resource(device_t dev, int type, int rid,
453 bus_dma_tag_t bus_get_dma_tag(device_t dev);
454 bus_space_tag_t bus_get_bus_tag(device_t dev);
455 int bus_get_domain(device_t dev, int *domain);
456 int bus_release_resource(device_t dev, int type, int rid,
458 int bus_free_resource(device_t dev, int type, struct resource *r);
459 int bus_setup_intr(device_t dev, struct resource *r, int flags,
460 driver_filter_t filter, driver_intr_t handler,
461 void *arg, void **cookiep);
462 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
463 int bus_bind_intr(device_t dev, struct resource *r, int cpu);
464 int bus_describe_intr(device_t dev, struct resource *irq, void *cookie,
465 const char *fmt, ...);
466 int bus_set_resource(device_t dev, int type, int rid,
467 rman_res_t start, rman_res_t count);
468 int bus_get_resource(device_t dev, int type, int rid,
469 rman_res_t *startp, rman_res_t *countp);
470 rman_res_t bus_get_resource_start(device_t dev, int type, int rid);
471 rman_res_t bus_get_resource_count(device_t dev, int type, int rid);
472 void bus_delete_resource(device_t dev, int type, int rid);
473 int bus_child_present(device_t child);
474 int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen);
475 int bus_child_location_str(device_t child, char *buf, size_t buflen);
476 void bus_enumerate_hinted_children(device_t bus);
478 static __inline struct resource *
479 bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags)
481 return (bus_alloc_resource(dev, type, rid, 0ul, ~0ul, 1, flags));
484 static __inline struct resource *
485 bus_alloc_resource_anywhere(device_t dev, int type, int *rid,
486 rman_res_t count, u_int flags)
488 return (bus_alloc_resource(dev, type, rid, 0ul, ~0ul, count, flags));
492 * Access functions for device.
494 device_t device_add_child(device_t dev, const char *name, int unit);
495 device_t device_add_child_ordered(device_t dev, u_int order,
496 const char *name, int unit);
497 void device_busy(device_t dev);
498 int device_delete_child(device_t dev, device_t child);
499 int device_delete_children(device_t dev);
500 int device_attach(device_t dev);
501 int device_detach(device_t dev);
502 void device_disable(device_t dev);
503 void device_enable(device_t dev);
504 device_t device_find_child(device_t dev, const char *classname,
506 const char *device_get_desc(device_t dev);
507 devclass_t device_get_devclass(device_t dev);
508 driver_t *device_get_driver(device_t dev);
509 u_int32_t device_get_flags(device_t dev);
510 device_t device_get_parent(device_t dev);
511 int device_get_children(device_t dev, device_t **listp, int *countp);
512 void *device_get_ivars(device_t dev);
513 void device_set_ivars(device_t dev, void *ivars);
514 const char *device_get_name(device_t dev);
515 const char *device_get_nameunit(device_t dev);
516 void *device_get_softc(device_t dev);
517 device_state_t device_get_state(device_t dev);
518 int device_get_unit(device_t dev);
519 struct sysctl_ctx_list *device_get_sysctl_ctx(device_t dev);
520 struct sysctl_oid *device_get_sysctl_tree(device_t dev);
521 int device_is_alive(device_t dev); /* did probe succeed? */
522 int device_is_attached(device_t dev); /* did attach succeed? */
523 int device_is_enabled(device_t dev);
524 int device_is_suspended(device_t dev);
525 int device_is_quiet(device_t dev);
526 int device_print_prettyname(device_t dev);
527 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
528 int device_probe(device_t dev);
529 int device_probe_and_attach(device_t dev);
530 int device_probe_child(device_t bus, device_t dev);
531 int device_quiesce(device_t dev);
532 void device_quiet(device_t dev);
533 void device_set_desc(device_t dev, const char* desc);
534 void device_set_desc_copy(device_t dev, const char* desc);
535 int device_set_devclass(device_t dev, const char *classname);
536 int device_set_devclass_fixed(device_t dev, const char *classname);
537 int device_set_driver(device_t dev, driver_t *driver);
538 void device_set_flags(device_t dev, u_int32_t flags);
539 void device_set_softc(device_t dev, void *softc);
540 void device_free_softc(void *softc);
541 void device_claim_softc(device_t dev);
542 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
543 int device_shutdown(device_t dev);
544 void device_unbusy(device_t dev);
545 void device_verbose(device_t dev);
548 * Access functions for devclass.
550 int devclass_add_driver(devclass_t dc, driver_t *driver,
551 int pass, devclass_t *dcp);
552 devclass_t devclass_create(const char *classname);
553 int devclass_delete_driver(devclass_t busclass, driver_t *driver);
554 devclass_t devclass_find(const char *classname);
555 const char *devclass_get_name(devclass_t dc);
556 device_t devclass_get_device(devclass_t dc, int unit);
557 void *devclass_get_softc(devclass_t dc, int unit);
558 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
559 int devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp);
560 int devclass_get_count(devclass_t dc);
561 int devclass_get_maxunit(devclass_t dc);
562 int devclass_find_free_unit(devclass_t dc, int unit);
563 void devclass_set_parent(devclass_t dc, devclass_t pdc);
564 devclass_t devclass_get_parent(devclass_t dc);
565 struct sysctl_ctx_list *devclass_get_sysctl_ctx(devclass_t dc);
566 struct sysctl_oid *devclass_get_sysctl_tree(devclass_t dc);
569 * Access functions for device resources.
572 int resource_int_value(const char *name, int unit, const char *resname,
574 int resource_long_value(const char *name, int unit, const char *resname,
576 int resource_string_value(const char *name, int unit, const char *resname,
577 const char **result);
578 int resource_disabled(const char *name, int unit);
579 int resource_find_match(int *anchor, const char **name, int *unit,
580 const char *resname, const char *value);
581 int resource_find_dev(int *anchor, const char *name, int *unit,
582 const char *resname, const char *value);
583 int resource_set_int(const char *name, int unit, const char *resname,
585 int resource_set_long(const char *name, int unit, const char *resname,
587 int resource_set_string(const char *name, int unit, const char *resname,
589 int resource_unset_value(const char *name, int unit, const char *resname);
592 * Functions for maintaining and checking consistency of
593 * bus information exported to userspace.
595 int bus_data_generation_check(int generation);
596 void bus_data_generation_update(void);
599 * Some convenience defines for probe routines to return. These are just
600 * suggested values, and there's nothing magical about them.
601 * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no
602 * possible other driver may exist (typically legacy drivers who don't fallow
603 * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the
604 * suggested value that vendor supplied drivers use. This is for source or
605 * binary drivers that are not yet integrated into the FreeBSD tree. Its use
606 * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value
607 * for drivers to use. It is intended that nearly all of the drivers in the
608 * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that
609 * have special requirements like when there are two drivers that support
610 * overlapping series of hardware devices. In this case the one that supports
611 * the older part of the line would return this value, while the one that
612 * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC
613 * is for drivers that wish to have a generic form and a specialized form,
614 * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is
615 * for those busses that implement a generic device place-holder for devices on
616 * the bus that have no more specific driver for them (aka ugen).
617 * BUS_PROBE_NOWILDCARD or lower means that the device isn't really bidding
618 * for a device node, but accepts only devices that its parent has told it
621 #define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */
622 #define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */
623 #define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */
624 #define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */
625 #define BUS_PROBE_GENERIC (-100) /* generic driver for dev */
626 #define BUS_PROBE_HOOVER (-1000000) /* Driver for any dev on bus */
627 #define BUS_PROBE_NOWILDCARD (-2000000000) /* No wildcard device matches */
630 * During boot, the device tree is scanned multiple times. Each scan,
631 * or pass, drivers may be attached to devices. Each driver
632 * attachment is assigned a pass number. Drivers may only probe and
633 * attach to devices if their pass number is less than or equal to the
634 * current system-wide pass number. The default pass is the last pass
635 * and is used by most drivers. Drivers needed by the scheduler are
636 * probed in earlier passes.
638 #define BUS_PASS_ROOT 0 /* Used to attach root0. */
639 #define BUS_PASS_BUS 10 /* Busses and bridges. */
640 #define BUS_PASS_CPU 20 /* CPU devices. */
641 #define BUS_PASS_RESOURCE 30 /* Resource discovery. */
642 #define BUS_PASS_INTERRUPT 40 /* Interrupt controllers. */
643 #define BUS_PASS_TIMER 50 /* Timers and clocks. */
644 #define BUS_PASS_SCHEDULER 60 /* Start scheduler. */
645 #define BUS_PASS_DEFAULT __INT_MAX /* Everything else. */
647 #define BUS_PASS_ORDER_FIRST 0
648 #define BUS_PASS_ORDER_EARLY 2
649 #define BUS_PASS_ORDER_MIDDLE 5
650 #define BUS_PASS_ORDER_LATE 7
651 #define BUS_PASS_ORDER_LAST 9
653 extern int bus_current_pass;
655 void bus_set_pass(int pass);
658 * Shorthands for constructing method tables.
660 #define DEVMETHOD KOBJMETHOD
661 #define DEVMETHOD_END KOBJMETHOD_END
664 * Some common device interfaces.
666 #include "device_if.h"
671 int driver_module_handler(struct module *, int, void *);
674 * Module support for automatically adding drivers to busses.
676 struct driver_module_data {
677 int (*dmd_chainevh)(struct module *, int, void *);
679 const char *dmd_busname;
680 kobj_class_t dmd_driver;
681 devclass_t *dmd_devclass;
685 #define EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
686 evh, arg, order, pass) \
688 static struct driver_module_data name##_##busname##_driver_mod = { \
691 (kobj_class_t) &driver, \
696 static moduledata_t name##_##busname##_mod = { \
697 #busname "/" #name, \
698 driver_module_handler, \
699 &name##_##busname##_driver_mod \
701 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
702 SI_SUB_DRIVERS, order)
704 #define EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, pass) \
705 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
706 evh, arg, SI_ORDER_MIDDLE, pass)
708 #define DRIVER_MODULE_ORDERED(name, busname, driver, devclass, evh, arg,\
710 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
711 evh, arg, order, BUS_PASS_DEFAULT)
713 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
714 EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, \
718 * Generic ivar accessor generation macros for bus drivers
720 #define __BUS_ACCESSOR(varp, var, ivarp, ivar, type) \
722 static __inline type varp ## _get_ ## var(device_t dev) \
725 BUS_READ_IVAR(device_get_parent(dev), dev, \
726 ivarp ## _IVAR_ ## ivar, &v); \
730 static __inline void varp ## _set_ ## var(device_t dev, type t) \
732 uintptr_t v = (uintptr_t) t; \
733 BUS_WRITE_IVAR(device_get_parent(dev), dev, \
734 ivarp ## _IVAR_ ## ivar, v); \
738 * Shorthand macros, taking resource argument
739 * Generated with sys/tools/bus_macro.sh
742 #define bus_barrier(r, o, l, f) \
743 bus_space_barrier((r)->r_bustag, (r)->r_bushandle, (o), (l), (f))
744 #define bus_read_1(r, o) \
745 bus_space_read_1((r)->r_bustag, (r)->r_bushandle, (o))
746 #define bus_read_multi_1(r, o, d, c) \
747 bus_space_read_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
748 #define bus_read_region_1(r, o, d, c) \
749 bus_space_read_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
750 #define bus_set_multi_1(r, o, v, c) \
751 bus_space_set_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
752 #define bus_set_region_1(r, o, v, c) \
753 bus_space_set_region_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
754 #define bus_write_1(r, o, v) \
755 bus_space_write_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
756 #define bus_write_multi_1(r, o, d, c) \
757 bus_space_write_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
758 #define bus_write_region_1(r, o, d, c) \
759 bus_space_write_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
760 #define bus_read_stream_1(r, o) \
761 bus_space_read_stream_1((r)->r_bustag, (r)->r_bushandle, (o))
762 #define bus_read_multi_stream_1(r, o, d, c) \
763 bus_space_read_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
764 #define bus_read_region_stream_1(r, o, d, c) \
765 bus_space_read_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
766 #define bus_set_multi_stream_1(r, o, v, c) \
767 bus_space_set_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
768 #define bus_set_region_stream_1(r, o, v, c) \
769 bus_space_set_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
770 #define bus_write_stream_1(r, o, v) \
771 bus_space_write_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
772 #define bus_write_multi_stream_1(r, o, d, c) \
773 bus_space_write_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
774 #define bus_write_region_stream_1(r, o, d, c) \
775 bus_space_write_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
776 #define bus_read_2(r, o) \
777 bus_space_read_2((r)->r_bustag, (r)->r_bushandle, (o))
778 #define bus_read_multi_2(r, o, d, c) \
779 bus_space_read_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
780 #define bus_read_region_2(r, o, d, c) \
781 bus_space_read_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
782 #define bus_set_multi_2(r, o, v, c) \
783 bus_space_set_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
784 #define bus_set_region_2(r, o, v, c) \
785 bus_space_set_region_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
786 #define bus_write_2(r, o, v) \
787 bus_space_write_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
788 #define bus_write_multi_2(r, o, d, c) \
789 bus_space_write_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
790 #define bus_write_region_2(r, o, d, c) \
791 bus_space_write_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
792 #define bus_read_stream_2(r, o) \
793 bus_space_read_stream_2((r)->r_bustag, (r)->r_bushandle, (o))
794 #define bus_read_multi_stream_2(r, o, d, c) \
795 bus_space_read_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
796 #define bus_read_region_stream_2(r, o, d, c) \
797 bus_space_read_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
798 #define bus_set_multi_stream_2(r, o, v, c) \
799 bus_space_set_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
800 #define bus_set_region_stream_2(r, o, v, c) \
801 bus_space_set_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
802 #define bus_write_stream_2(r, o, v) \
803 bus_space_write_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
804 #define bus_write_multi_stream_2(r, o, d, c) \
805 bus_space_write_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
806 #define bus_write_region_stream_2(r, o, d, c) \
807 bus_space_write_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
808 #define bus_read_4(r, o) \
809 bus_space_read_4((r)->r_bustag, (r)->r_bushandle, (o))
810 #define bus_read_multi_4(r, o, d, c) \
811 bus_space_read_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
812 #define bus_read_region_4(r, o, d, c) \
813 bus_space_read_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
814 #define bus_set_multi_4(r, o, v, c) \
815 bus_space_set_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
816 #define bus_set_region_4(r, o, v, c) \
817 bus_space_set_region_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
818 #define bus_write_4(r, o, v) \
819 bus_space_write_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
820 #define bus_write_multi_4(r, o, d, c) \
821 bus_space_write_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
822 #define bus_write_region_4(r, o, d, c) \
823 bus_space_write_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
824 #define bus_read_stream_4(r, o) \
825 bus_space_read_stream_4((r)->r_bustag, (r)->r_bushandle, (o))
826 #define bus_read_multi_stream_4(r, o, d, c) \
827 bus_space_read_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
828 #define bus_read_region_stream_4(r, o, d, c) \
829 bus_space_read_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
830 #define bus_set_multi_stream_4(r, o, v, c) \
831 bus_space_set_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
832 #define bus_set_region_stream_4(r, o, v, c) \
833 bus_space_set_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
834 #define bus_write_stream_4(r, o, v) \
835 bus_space_write_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
836 #define bus_write_multi_stream_4(r, o, d, c) \
837 bus_space_write_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
838 #define bus_write_region_stream_4(r, o, d, c) \
839 bus_space_write_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
840 #define bus_read_8(r, o) \
841 bus_space_read_8((r)->r_bustag, (r)->r_bushandle, (o))
842 #define bus_read_multi_8(r, o, d, c) \
843 bus_space_read_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
844 #define bus_read_region_8(r, o, d, c) \
845 bus_space_read_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
846 #define bus_set_multi_8(r, o, v, c) \
847 bus_space_set_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
848 #define bus_set_region_8(r, o, v, c) \
849 bus_space_set_region_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
850 #define bus_write_8(r, o, v) \
851 bus_space_write_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
852 #define bus_write_multi_8(r, o, d, c) \
853 bus_space_write_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
854 #define bus_write_region_8(r, o, d, c) \
855 bus_space_write_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
856 #define bus_read_stream_8(r, o) \
857 bus_space_read_stream_8((r)->r_bustag, (r)->r_bushandle, (o))
858 #define bus_read_multi_stream_8(r, o, d, c) \
859 bus_space_read_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
860 #define bus_read_region_stream_8(r, o, d, c) \
861 bus_space_read_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
862 #define bus_set_multi_stream_8(r, o, v, c) \
863 bus_space_set_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
864 #define bus_set_region_stream_8(r, o, v, c) \
865 bus_space_set_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
866 #define bus_write_stream_8(r, o, v) \
867 bus_space_write_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
868 #define bus_write_multi_stream_8(r, o, d, c) \
869 bus_space_write_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
870 #define bus_write_region_stream_8(r, o, d, c) \
871 bus_space_write_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
874 #endif /* !_SYS_BUS_H_ */