2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997,1998,2003 Doug Rabson
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <machine/_limits.h>
35 #include <machine/_bus.h>
36 #include <sys/_bus_dma.h>
37 #include <sys/ioccom.h>
40 * @defgroup NEWBUS newbus - a generic framework for managing devices
45 * @brief Interface information structure.
48 int ub_version; /**< @brief interface version */
49 #define BUS_USER_VERSION 2
50 int ub_generation; /**< @brief generation count */
54 * @brief State of the device.
56 typedef enum device_state {
57 DS_NOTPRESENT = 10, /**< @brief not probed or probe failed */
58 DS_ALIVE = 20, /**< @brief probe succeeded */
59 DS_ATTACHING = 25, /**< @brief currently attaching */
60 DS_ATTACHED = 30, /**< @brief attach method called */
61 DS_BUSY = 40 /**< @brief device is open */
65 * @brief Device information exported to userspace.
66 * The strings are placed one after the other, separated by NUL characters.
67 * Fields should be added after the last one and order maintained for compatibility
69 #define BUS_USER_BUFFER (3*1024)
73 uint32_t dv_devflags; /**< @brief API Flags for device */
74 uint16_t dv_flags; /**< @brief flags for dev state */
75 device_state_t dv_state; /**< @brief State of attachment */
76 char dv_fields[BUS_USER_BUFFER]; /**< @brief NUL terminated fields */
77 /* name (name of the device in tree) */
78 /* desc (driver description) */
79 /* drivername (Name of driver without unit number) */
80 /* pnpinfo (Plug and play information from bus) */
81 /* location (Location of device on parent */
85 /* Flags exported via dv_flags. */
86 #define DF_ENABLED 0x01 /* device should be probed/attached */
87 #define DF_FIXEDCLASS 0x02 /* devclass specified at create time */
88 #define DF_WILDCARD 0x04 /* unit was originally wildcard */
89 #define DF_DESCMALLOCED 0x08 /* description was malloced */
90 #define DF_QUIET 0x10 /* don't print verbose attach message */
91 #define DF_DONENOMATCH 0x20 /* don't execute DEVICE_NOMATCH again */
92 #define DF_EXTERNALSOFTC 0x40 /* softc not allocated by us */
93 #define DF_REBID 0x80 /* Can rebid after attach */
94 #define DF_SUSPENDED 0x100 /* Device is suspended. */
95 #define DF_QUIET_CHILDREN 0x200 /* Default to quiet for all my children */
96 #define DF_NEEDNOMATCH 0x800 /* Has a pending NOMATCH event */
99 * @brief Device request structure used for ioctl's.
101 * Used for ioctl's on /dev/devctl2. All device ioctl's
102 * must have parameter definitions which begin with dr_name.
104 struct devreq_buffer {
111 int dr_flags; /* request-specific flags */
113 struct devreq_buffer dru_buffer;
116 #define dr_buffer dr_dru.dru_buffer /* variable-sized buffer */
117 #define dr_data dr_dru.dru_data /* fixed-size buffer */
120 #define DEV_ATTACH _IOW('D', 1, struct devreq)
121 #define DEV_DETACH _IOW('D', 2, struct devreq)
122 #define DEV_ENABLE _IOW('D', 3, struct devreq)
123 #define DEV_DISABLE _IOW('D', 4, struct devreq)
124 #define DEV_SUSPEND _IOW('D', 5, struct devreq)
125 #define DEV_RESUME _IOW('D', 6, struct devreq)
126 #define DEV_SET_DRIVER _IOW('D', 7, struct devreq)
127 #define DEV_CLEAR_DRIVER _IOW('D', 8, struct devreq)
128 #define DEV_RESCAN _IOW('D', 9, struct devreq)
129 #define DEV_DELETE _IOW('D', 10, struct devreq)
130 #define DEV_FREEZE _IOW('D', 11, struct devreq)
131 #define DEV_THAW _IOW('D', 12, struct devreq)
133 /* Flags for DEV_DETACH and DEV_DISABLE. */
134 #define DEVF_FORCE_DETACH 0x0000001
136 /* Flags for DEV_SET_DRIVER. */
137 #define DEVF_SET_DRIVER_DETACH 0x0000001 /* Detach existing driver. */
139 /* Flags for DEV_CLEAR_DRIVER. */
140 #define DEVF_CLEAR_DRIVER_DETACH 0x0000001 /* Detach existing driver. */
142 /* Flags for DEV_DELETE. */
143 #define DEVF_FORCE_DELETE 0x0000001
147 #include <sys/eventhandler.h>
148 #include <sys/kobj.h>
151 * devctl hooks. Typically one should use the devctl_notify
152 * hook to send the message. However, devctl_queue_data is also
153 * included in case devctl_notify isn't sufficiently general.
155 boolean_t devctl_process_running(void);
156 void devctl_notify_f(const char *__system, const char *__subsystem,
157 const char *__type, const char *__data, int __flags);
158 void devctl_notify(const char *__system, const char *__subsystem,
159 const char *__type, const char *__data);
160 void devctl_queue_data_f(char *__data, int __flags);
161 void devctl_queue_data(char *__data);
163 void devctl_safe_quote_sb(struct sbuf *__sb, const char *__src);
166 * Device name parsers. Hook to allow device enumerators to map
167 * scheme-specific names to a device.
169 typedef void (*dev_lookup_fn)(void *arg, const char *name,
171 EVENTHANDLER_DECLARE(dev_lookup, dev_lookup_fn);
174 * @brief A device driver (included mainly for compatibility with
177 typedef struct kobj_class driver_t;
180 * @brief A device class
182 * The devclass object has two main functions in the system. The first
183 * is to manage the allocation of unit numbers for device instances
184 * and the second is to hold the list of device drivers for a
185 * particular bus type. Each devclass has a name and there cannot be
186 * two devclasses with the same name. This ensures that unique unit
187 * numbers are allocated to device instances.
189 * Drivers that support several different bus attachments (e.g. isa,
190 * pci, pccard) should all use the same devclass to ensure that unit
191 * numbers do not conflict.
193 * Each devclass may also have a parent devclass. This is used when
194 * searching for device drivers to allow a form of inheritance. When
195 * matching drivers with devices, first the driver list of the parent
196 * device's devclass is searched. If no driver is found in that list,
197 * the search continues in the parent devclass (if any).
199 typedef struct devclass *devclass_t;
202 * @brief A device method
204 #define device_method_t kobj_method_t
207 * @brief Driver interrupt filter return values
209 * If a driver provides an interrupt filter routine it must return an
210 * integer consisting of oring together zero or more of the following
213 * FILTER_STRAY - this device did not trigger the interrupt
214 * FILTER_HANDLED - the interrupt has been fully handled and can be EOId
215 * FILTER_SCHEDULE_THREAD - the threaded interrupt handler should be
216 * scheduled to execute
218 * If the driver does not provide a filter, then the interrupt code will
219 * act is if the filter had returned FILTER_SCHEDULE_THREAD. Note that it
220 * is illegal to specify any other flag with FILTER_STRAY and that it is
221 * illegal to not specify either of FILTER_HANDLED or FILTER_SCHEDULE_THREAD
222 * if FILTER_STRAY is not specified.
224 #define FILTER_STRAY 0x01
225 #define FILTER_HANDLED 0x02
226 #define FILTER_SCHEDULE_THREAD 0x04
229 * @brief Driver interrupt service routines
231 * The filter routine is run in primary interrupt context and may not
232 * block or use regular mutexes. It may only use spin mutexes for
233 * synchronization. The filter may either completely handle the
234 * interrupt or it may perform some of the work and defer more
235 * expensive work to the regular interrupt handler. If a filter
236 * routine is not registered by the driver, then the regular interrupt
237 * handler is always used to handle interrupts from this device.
239 * The regular interrupt handler executes in its own thread context
240 * and may use regular mutexes. However, it is prohibited from
241 * sleeping on a sleep queue.
243 typedef int driver_filter_t(void*);
244 typedef void driver_intr_t(void*);
247 * @brief Interrupt type bits.
249 * These flags are used both by newbus interrupt
250 * registration (nexus.c) and also in struct intrec, which defines
251 * interrupt properties.
253 * XXX We should probably revisit this and remove the vestiges of the
254 * spls implicit in names like INTR_TYPE_TTY. In the meantime, don't
255 * confuse things by renaming them (Grog, 18 July 2000).
257 * Buses which do interrupt remapping will want to change their type
258 * to reflect what sort of devices are underneath.
268 INTR_EXCL = 256, /* exclusive interrupt */
269 INTR_MPSAFE = 512, /* this interrupt is SMP safe */
270 INTR_ENTROPY = 1024, /* this interrupt provides entropy */
271 INTR_MD1 = 4096, /* flag reserved for MD use */
272 INTR_MD2 = 8192, /* flag reserved for MD use */
273 INTR_MD3 = 16384, /* flag reserved for MD use */
274 INTR_MD4 = 32768 /* flag reserved for MD use */
278 INTR_TRIGGER_INVALID = -1,
279 INTR_TRIGGER_CONFORM = 0,
280 INTR_TRIGGER_EDGE = 1,
281 INTR_TRIGGER_LEVEL = 2
285 INTR_POLARITY_CONFORM = 0,
286 INTR_POLARITY_HIGH = 1,
287 INTR_POLARITY_LOW = 2
291 * CPU sets supported by bus_get_cpus(). Note that not all sets may be
292 * supported for a given device. If a request is not supported by a
293 * device (or its parents), then bus_get_cpus() will fail with EINVAL.
300 typedef int (*devop_t)(void);
303 * @brief This structure is deprecated.
305 * Use the kobj(9) macro DEFINE_CLASS to
306 * declare classes which implement device drivers.
313 * @brief A resource mapping.
315 struct resource_map {
316 bus_space_tag_t r_bustag;
317 bus_space_handle_t r_bushandle;
323 * @brief Optional properties of a resource mapping request.
325 struct resource_map_request {
329 vm_memattr_t memattr;
332 void resource_init_map_request_impl(struct resource_map_request *_args,
334 #define resource_init_map_request(rmr) \
335 resource_init_map_request_impl((rmr), sizeof(*(rmr)))
338 * Definitions for drivers which need to keep simple lists of resources
339 * for their child devices.
344 * @brief An entry for a single resource in a resource list.
346 struct resource_list_entry {
347 STAILQ_ENTRY(resource_list_entry) link;
348 int type; /**< @brief type argument to alloc_resource */
349 int rid; /**< @brief resource identifier */
350 int flags; /**< @brief resource flags */
351 struct resource *res; /**< @brief the real resource when allocated */
352 rman_res_t start; /**< @brief start of resource range */
353 rman_res_t end; /**< @brief end of resource range */
354 rman_res_t count; /**< @brief count within range */
356 STAILQ_HEAD(resource_list, resource_list_entry);
358 #define RLE_RESERVED 0x0001 /* Reserved by the parent bus. */
359 #define RLE_ALLOCATED 0x0002 /* Reserved resource is allocated. */
360 #define RLE_PREFETCH 0x0004 /* Resource is a prefetch range. */
362 void resource_list_init(struct resource_list *rl);
363 void resource_list_free(struct resource_list *rl);
364 struct resource_list_entry *
365 resource_list_add(struct resource_list *rl,
367 rman_res_t start, rman_res_t end, rman_res_t count);
368 int resource_list_add_next(struct resource_list *rl,
370 rman_res_t start, rman_res_t end, rman_res_t count);
371 int resource_list_busy(struct resource_list *rl,
373 int resource_list_reserved(struct resource_list *rl, int type, int rid);
374 struct resource_list_entry*
375 resource_list_find(struct resource_list *rl,
377 void resource_list_delete(struct resource_list *rl,
380 resource_list_alloc(struct resource_list *rl,
381 device_t bus, device_t child,
383 rman_res_t start, rman_res_t end,
384 rman_res_t count, u_int flags);
385 int resource_list_release(struct resource_list *rl,
386 device_t bus, device_t child,
387 int type, int rid, struct resource *res);
388 int resource_list_release_active(struct resource_list *rl,
389 device_t bus, device_t child,
392 resource_list_reserve(struct resource_list *rl,
393 device_t bus, device_t child,
395 rman_res_t start, rman_res_t end,
396 rman_res_t count, u_int flags);
397 int resource_list_unreserve(struct resource_list *rl,
398 device_t bus, device_t child,
400 void resource_list_purge(struct resource_list *rl);
401 int resource_list_print_type(struct resource_list *rl,
402 const char *name, int type,
406 * The root bus, to which all top-level buses are attached.
408 extern device_t root_bus;
409 extern devclass_t root_devclass;
410 void root_bus_configure(void);
413 * Useful functions for implementing buses.
416 int bus_generic_activate_resource(device_t dev, device_t child, int type,
417 int rid, struct resource *r);
419 bus_generic_add_child(device_t dev, u_int order, const char *name,
421 int bus_generic_adjust_resource(device_t bus, device_t child, int type,
422 struct resource *r, rman_res_t start,
425 bus_generic_alloc_resource(device_t bus, device_t child, int type,
426 int *rid, rman_res_t start, rman_res_t end,
427 rman_res_t count, u_int flags);
428 int bus_generic_attach(device_t dev);
429 int bus_generic_bind_intr(device_t dev, device_t child,
430 struct resource *irq, int cpu);
431 int bus_generic_child_present(device_t dev, device_t child);
432 int bus_generic_config_intr(device_t, int, enum intr_trigger,
434 int bus_generic_describe_intr(device_t dev, device_t child,
435 struct resource *irq, void *cookie,
437 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
438 int rid, struct resource *r);
439 int bus_generic_detach(device_t dev);
440 void bus_generic_driver_added(device_t dev, driver_t *driver);
441 int bus_generic_get_cpus(device_t dev, device_t child, enum cpu_sets op,
442 size_t setsize, struct _cpuset *cpuset);
444 bus_generic_get_dma_tag(device_t dev, device_t child);
446 bus_generic_get_bus_tag(device_t dev, device_t child);
447 int bus_generic_get_domain(device_t dev, device_t child, int *domain);
448 struct resource_list *
449 bus_generic_get_resource_list (device_t, device_t);
450 int bus_generic_map_resource(device_t dev, device_t child, int type,
452 struct resource_map_request *args,
453 struct resource_map *map);
454 void bus_generic_new_pass(device_t dev);
455 int bus_print_child_header(device_t dev, device_t child);
456 int bus_print_child_domain(device_t dev, device_t child);
457 int bus_print_child_footer(device_t dev, device_t child);
458 int bus_generic_print_child(device_t dev, device_t child);
459 int bus_generic_probe(device_t dev);
460 int bus_generic_read_ivar(device_t dev, device_t child, int which,
462 int bus_generic_release_resource(device_t bus, device_t child,
463 int type, int rid, struct resource *r);
464 int bus_generic_resume(device_t dev);
465 int bus_generic_resume_child(device_t dev, device_t child);
466 int bus_generic_setup_intr(device_t dev, device_t child,
467 struct resource *irq, int flags,
468 driver_filter_t *filter, driver_intr_t *intr,
469 void *arg, void **cookiep);
472 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
473 rman_res_t, rman_res_t, rman_res_t, u_int);
474 void bus_generic_rl_delete_resource (device_t, device_t, int, int);
475 int bus_generic_rl_get_resource (device_t, device_t, int, int, rman_res_t *,
477 int bus_generic_rl_set_resource (device_t, device_t, int, int, rman_res_t,
479 int bus_generic_rl_release_resource (device_t, device_t, int, int,
482 int bus_generic_shutdown(device_t dev);
483 int bus_generic_suspend(device_t dev);
484 int bus_generic_suspend_child(device_t dev, device_t child);
485 int bus_generic_teardown_intr(device_t dev, device_t child,
486 struct resource *irq, void *cookie);
487 int bus_generic_unmap_resource(device_t dev, device_t child, int type,
489 struct resource_map *map);
490 int bus_generic_write_ivar(device_t dev, device_t child, int which,
492 int bus_null_rescan(device_t dev);
495 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
499 struct resource_spec {
504 #define RESOURCE_SPEC_END {-1, 0, 0}
506 int bus_alloc_resources(device_t dev, struct resource_spec *rs,
507 struct resource **res);
508 void bus_release_resources(device_t dev, const struct resource_spec *rs,
509 struct resource **res);
511 int bus_adjust_resource(device_t child, int type, struct resource *r,
512 rman_res_t start, rman_res_t end);
513 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
514 rman_res_t start, rman_res_t end,
515 rman_res_t count, u_int flags);
516 int bus_activate_resource(device_t dev, int type, int rid,
518 int bus_deactivate_resource(device_t dev, int type, int rid,
520 int bus_map_resource(device_t dev, int type, struct resource *r,
521 struct resource_map_request *args,
522 struct resource_map *map);
523 int bus_unmap_resource(device_t dev, int type, struct resource *r,
524 struct resource_map *map);
525 int bus_get_cpus(device_t dev, enum cpu_sets op, size_t setsize,
526 struct _cpuset *cpuset);
527 bus_dma_tag_t bus_get_dma_tag(device_t dev);
528 bus_space_tag_t bus_get_bus_tag(device_t dev);
529 int bus_get_domain(device_t dev, int *domain);
530 int bus_release_resource(device_t dev, int type, int rid,
532 int bus_free_resource(device_t dev, int type, struct resource *r);
533 int bus_setup_intr(device_t dev, struct resource *r, int flags,
534 driver_filter_t filter, driver_intr_t handler,
535 void *arg, void **cookiep);
536 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
537 int bus_bind_intr(device_t dev, struct resource *r, int cpu);
538 int bus_describe_intr(device_t dev, struct resource *irq, void *cookie,
539 const char *fmt, ...) __printflike(4, 5);
540 int bus_set_resource(device_t dev, int type, int rid,
541 rman_res_t start, rman_res_t count);
542 int bus_get_resource(device_t dev, int type, int rid,
543 rman_res_t *startp, rman_res_t *countp);
544 rman_res_t bus_get_resource_start(device_t dev, int type, int rid);
545 rman_res_t bus_get_resource_count(device_t dev, int type, int rid);
546 void bus_delete_resource(device_t dev, int type, int rid);
547 int bus_child_present(device_t child);
548 int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen);
549 int bus_child_location_str(device_t child, char *buf, size_t buflen);
550 void bus_enumerate_hinted_children(device_t bus);
552 static __inline struct resource *
553 bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags)
555 return (bus_alloc_resource(dev, type, rid, 0, ~0, 1, flags));
558 static __inline struct resource *
559 bus_alloc_resource_anywhere(device_t dev, int type, int *rid,
560 rman_res_t count, u_int flags)
562 return (bus_alloc_resource(dev, type, rid, 0, ~0, count, flags));
566 * Access functions for device.
568 device_t device_add_child(device_t dev, const char *name, int unit);
569 device_t device_add_child_ordered(device_t dev, u_int order,
570 const char *name, int unit);
571 void device_busy(device_t dev);
572 int device_delete_child(device_t dev, device_t child);
573 int device_delete_children(device_t dev);
574 int device_attach(device_t dev);
575 int device_detach(device_t dev);
576 void device_disable(device_t dev);
577 void device_enable(device_t dev);
578 device_t device_find_child(device_t dev, const char *classname,
580 const char *device_get_desc(device_t dev);
581 devclass_t device_get_devclass(device_t dev);
582 driver_t *device_get_driver(device_t dev);
583 u_int32_t device_get_flags(device_t dev);
584 device_t device_get_parent(device_t dev);
585 int device_get_children(device_t dev, device_t **listp, int *countp);
586 void *device_get_ivars(device_t dev);
587 void device_set_ivars(device_t dev, void *ivars);
588 const char *device_get_name(device_t dev);
589 const char *device_get_nameunit(device_t dev);
590 void *device_get_softc(device_t dev);
591 device_state_t device_get_state(device_t dev);
592 int device_get_unit(device_t dev);
593 struct sysctl_ctx_list *device_get_sysctl_ctx(device_t dev);
594 struct sysctl_oid *device_get_sysctl_tree(device_t dev);
595 int device_has_quiet_children(device_t dev);
596 int device_is_alive(device_t dev); /* did probe succeed? */
597 int device_is_attached(device_t dev); /* did attach succeed? */
598 int device_is_enabled(device_t dev);
599 int device_is_suspended(device_t dev);
600 int device_is_quiet(device_t dev);
601 device_t device_lookup_by_name(const char *name);
602 int device_print_prettyname(device_t dev);
603 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
604 int device_probe(device_t dev);
605 int device_probe_and_attach(device_t dev);
606 int device_probe_child(device_t bus, device_t dev);
607 int device_quiesce(device_t dev);
608 void device_quiet(device_t dev);
609 void device_quiet_children(device_t dev);
610 void device_set_desc(device_t dev, const char* desc);
611 void device_set_desc_copy(device_t dev, const char* desc);
612 int device_set_devclass(device_t dev, const char *classname);
613 int device_set_devclass_fixed(device_t dev, const char *classname);
614 int device_set_driver(device_t dev, driver_t *driver);
615 void device_set_flags(device_t dev, u_int32_t flags);
616 void device_set_softc(device_t dev, void *softc);
617 void device_free_softc(void *softc);
618 void device_claim_softc(device_t dev);
619 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
620 int device_shutdown(device_t dev);
621 void device_unbusy(device_t dev);
622 void device_verbose(device_t dev);
625 * Access functions for devclass.
627 int devclass_add_driver(devclass_t dc, driver_t *driver,
628 int pass, devclass_t *dcp);
629 devclass_t devclass_create(const char *classname);
630 int devclass_delete_driver(devclass_t busclass, driver_t *driver);
631 devclass_t devclass_find(const char *classname);
632 const char *devclass_get_name(devclass_t dc);
633 device_t devclass_get_device(devclass_t dc, int unit);
634 void *devclass_get_softc(devclass_t dc, int unit);
635 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
636 int devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp);
637 int devclass_get_count(devclass_t dc);
638 int devclass_get_maxunit(devclass_t dc);
639 int devclass_find_free_unit(devclass_t dc, int unit);
640 void devclass_set_parent(devclass_t dc, devclass_t pdc);
641 devclass_t devclass_get_parent(devclass_t dc);
642 struct sysctl_ctx_list *devclass_get_sysctl_ctx(devclass_t dc);
643 struct sysctl_oid *devclass_get_sysctl_tree(devclass_t dc);
646 * Access functions for device resources.
648 int resource_int_value(const char *name, int unit, const char *resname,
650 int resource_long_value(const char *name, int unit, const char *resname,
652 int resource_string_value(const char *name, int unit, const char *resname,
653 const char **result);
654 int resource_disabled(const char *name, int unit);
655 int resource_find_match(int *anchor, const char **name, int *unit,
656 const char *resname, const char *value);
657 int resource_find_dev(int *anchor, const char *name, int *unit,
658 const char *resname, const char *value);
659 int resource_unset_value(const char *name, int unit, const char *resname);
662 * Functions for maintaining and checking consistency of
663 * bus information exported to userspace.
665 int bus_data_generation_check(int generation);
666 void bus_data_generation_update(void);
669 * Some convenience defines for probe routines to return. These are just
670 * suggested values, and there's nothing magical about them.
671 * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no
672 * possible other driver may exist (typically legacy drivers who don't follow
673 * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the
674 * suggested value that vendor supplied drivers use. This is for source or
675 * binary drivers that are not yet integrated into the FreeBSD tree. Its use
676 * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value
677 * for drivers to use. It is intended that nearly all of the drivers in the
678 * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that
679 * have special requirements like when there are two drivers that support
680 * overlapping series of hardware devices. In this case the one that supports
681 * the older part of the line would return this value, while the one that
682 * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC
683 * is for drivers that wish to have a generic form and a specialized form,
684 * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is
685 * for those buses that implement a generic device placeholder for devices on
686 * the bus that have no more specific driver for them (aka ugen).
687 * BUS_PROBE_NOWILDCARD or lower means that the device isn't really bidding
688 * for a device node, but accepts only devices that its parent has told it
691 #define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */
692 #define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */
693 #define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */
694 #define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */
695 #define BUS_PROBE_GENERIC (-100) /* generic driver for dev */
696 #define BUS_PROBE_HOOVER (-1000000) /* Driver for any dev on bus */
697 #define BUS_PROBE_NOWILDCARD (-2000000000) /* No wildcard device matches */
700 * During boot, the device tree is scanned multiple times. Each scan,
701 * or pass, drivers may be attached to devices. Each driver
702 * attachment is assigned a pass number. Drivers may only probe and
703 * attach to devices if their pass number is less than or equal to the
704 * current system-wide pass number. The default pass is the last pass
705 * and is used by most drivers. Drivers needed by the scheduler are
706 * probed in earlier passes.
708 #define BUS_PASS_ROOT 0 /* Used to attach root0. */
709 #define BUS_PASS_BUS 10 /* Buses and bridges. */
710 #define BUS_PASS_CPU 20 /* CPU devices. */
711 #define BUS_PASS_RESOURCE 30 /* Resource discovery. */
712 #define BUS_PASS_INTERRUPT 40 /* Interrupt controllers. */
713 #define BUS_PASS_TIMER 50 /* Timers and clocks. */
714 #define BUS_PASS_SCHEDULER 60 /* Start scheduler. */
715 #define BUS_PASS_SUPPORTDEV 100000 /* Drivers which support DEFAULT drivers. */
716 #define BUS_PASS_DEFAULT __INT_MAX /* Everything else. */
718 #define BUS_PASS_ORDER_FIRST 0
719 #define BUS_PASS_ORDER_EARLY 2
720 #define BUS_PASS_ORDER_MIDDLE 5
721 #define BUS_PASS_ORDER_LATE 7
722 #define BUS_PASS_ORDER_LAST 9
724 extern int bus_current_pass;
726 void bus_set_pass(int pass);
729 * Shorthands for constructing method tables.
731 #define DEVMETHOD KOBJMETHOD
732 #define DEVMETHOD_END KOBJMETHOD_END
735 * Some common device interfaces.
737 #include "device_if.h"
742 int driver_module_handler(struct module *, int, void *);
745 * Module support for automatically adding drivers to buses.
747 struct driver_module_data {
748 int (*dmd_chainevh)(struct module *, int, void *);
750 const char *dmd_busname;
751 kobj_class_t dmd_driver;
752 devclass_t *dmd_devclass;
756 #define EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
757 evh, arg, order, pass) \
759 static struct driver_module_data name##_##busname##_driver_mod = { \
762 (kobj_class_t) &driver, \
767 static moduledata_t name##_##busname##_mod = { \
768 #busname "/" #name, \
769 driver_module_handler, \
770 &name##_##busname##_driver_mod \
772 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
773 SI_SUB_DRIVERS, order)
775 #define EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, pass) \
776 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
777 evh, arg, SI_ORDER_MIDDLE, pass)
779 #define DRIVER_MODULE_ORDERED(name, busname, driver, devclass, evh, arg,\
781 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
782 evh, arg, order, BUS_PASS_DEFAULT)
784 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
785 EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, \
789 * Generic ivar accessor generation macros for bus drivers
791 #define __BUS_ACCESSOR(varp, var, ivarp, ivar, type) \
793 static __inline type varp ## _get_ ## var(device_t dev) \
796 BUS_READ_IVAR(device_get_parent(dev), dev, \
797 ivarp ## _IVAR_ ## ivar, &v); \
801 static __inline void varp ## _set_ ## var(device_t dev, type t) \
803 uintptr_t v = (uintptr_t) t; \
804 BUS_WRITE_IVAR(device_get_parent(dev), dev, \
805 ivarp ## _IVAR_ ## ivar, v); \
809 * Shorthand macros, taking resource argument
810 * Generated with sys/tools/bus_macro.sh
813 #define bus_barrier(r, o, l, f) \
814 bus_space_barrier((r)->r_bustag, (r)->r_bushandle, (o), (l), (f))
815 #define bus_read_1(r, o) \
816 bus_space_read_1((r)->r_bustag, (r)->r_bushandle, (o))
817 #define bus_read_multi_1(r, o, d, c) \
818 bus_space_read_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
819 #define bus_read_region_1(r, o, d, c) \
820 bus_space_read_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
821 #define bus_set_multi_1(r, o, v, c) \
822 bus_space_set_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
823 #define bus_set_region_1(r, o, v, c) \
824 bus_space_set_region_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
825 #define bus_write_1(r, o, v) \
826 bus_space_write_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
827 #define bus_write_multi_1(r, o, d, c) \
828 bus_space_write_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
829 #define bus_write_region_1(r, o, d, c) \
830 bus_space_write_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
831 #define bus_read_stream_1(r, o) \
832 bus_space_read_stream_1((r)->r_bustag, (r)->r_bushandle, (o))
833 #define bus_read_multi_stream_1(r, o, d, c) \
834 bus_space_read_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
835 #define bus_read_region_stream_1(r, o, d, c) \
836 bus_space_read_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
837 #define bus_set_multi_stream_1(r, o, v, c) \
838 bus_space_set_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
839 #define bus_set_region_stream_1(r, o, v, c) \
840 bus_space_set_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
841 #define bus_write_stream_1(r, o, v) \
842 bus_space_write_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
843 #define bus_write_multi_stream_1(r, o, d, c) \
844 bus_space_write_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
845 #define bus_write_region_stream_1(r, o, d, c) \
846 bus_space_write_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
847 #define bus_read_2(r, o) \
848 bus_space_read_2((r)->r_bustag, (r)->r_bushandle, (o))
849 #define bus_read_multi_2(r, o, d, c) \
850 bus_space_read_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
851 #define bus_read_region_2(r, o, d, c) \
852 bus_space_read_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
853 #define bus_set_multi_2(r, o, v, c) \
854 bus_space_set_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
855 #define bus_set_region_2(r, o, v, c) \
856 bus_space_set_region_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
857 #define bus_write_2(r, o, v) \
858 bus_space_write_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
859 #define bus_write_multi_2(r, o, d, c) \
860 bus_space_write_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
861 #define bus_write_region_2(r, o, d, c) \
862 bus_space_write_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
863 #define bus_read_stream_2(r, o) \
864 bus_space_read_stream_2((r)->r_bustag, (r)->r_bushandle, (o))
865 #define bus_read_multi_stream_2(r, o, d, c) \
866 bus_space_read_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
867 #define bus_read_region_stream_2(r, o, d, c) \
868 bus_space_read_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
869 #define bus_set_multi_stream_2(r, o, v, c) \
870 bus_space_set_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
871 #define bus_set_region_stream_2(r, o, v, c) \
872 bus_space_set_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
873 #define bus_write_stream_2(r, o, v) \
874 bus_space_write_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
875 #define bus_write_multi_stream_2(r, o, d, c) \
876 bus_space_write_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
877 #define bus_write_region_stream_2(r, o, d, c) \
878 bus_space_write_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
879 #define bus_read_4(r, o) \
880 bus_space_read_4((r)->r_bustag, (r)->r_bushandle, (o))
881 #define bus_read_multi_4(r, o, d, c) \
882 bus_space_read_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
883 #define bus_read_region_4(r, o, d, c) \
884 bus_space_read_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
885 #define bus_set_multi_4(r, o, v, c) \
886 bus_space_set_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
887 #define bus_set_region_4(r, o, v, c) \
888 bus_space_set_region_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
889 #define bus_write_4(r, o, v) \
890 bus_space_write_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
891 #define bus_write_multi_4(r, o, d, c) \
892 bus_space_write_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
893 #define bus_write_region_4(r, o, d, c) \
894 bus_space_write_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
895 #define bus_read_stream_4(r, o) \
896 bus_space_read_stream_4((r)->r_bustag, (r)->r_bushandle, (o))
897 #define bus_read_multi_stream_4(r, o, d, c) \
898 bus_space_read_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
899 #define bus_read_region_stream_4(r, o, d, c) \
900 bus_space_read_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
901 #define bus_set_multi_stream_4(r, o, v, c) \
902 bus_space_set_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
903 #define bus_set_region_stream_4(r, o, v, c) \
904 bus_space_set_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
905 #define bus_write_stream_4(r, o, v) \
906 bus_space_write_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
907 #define bus_write_multi_stream_4(r, o, d, c) \
908 bus_space_write_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
909 #define bus_write_region_stream_4(r, o, d, c) \
910 bus_space_write_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
911 #define bus_read_8(r, o) \
912 bus_space_read_8((r)->r_bustag, (r)->r_bushandle, (o))
913 #define bus_read_multi_8(r, o, d, c) \
914 bus_space_read_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
915 #define bus_read_region_8(r, o, d, c) \
916 bus_space_read_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
917 #define bus_set_multi_8(r, o, v, c) \
918 bus_space_set_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
919 #define bus_set_region_8(r, o, v, c) \
920 bus_space_set_region_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
921 #define bus_write_8(r, o, v) \
922 bus_space_write_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
923 #define bus_write_multi_8(r, o, d, c) \
924 bus_space_write_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
925 #define bus_write_region_8(r, o, d, c) \
926 bus_space_write_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
927 #define bus_read_stream_8(r, o) \
928 bus_space_read_stream_8((r)->r_bustag, (r)->r_bushandle, (o))
929 #define bus_read_multi_stream_8(r, o, d, c) \
930 bus_space_read_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
931 #define bus_read_region_stream_8(r, o, d, c) \
932 bus_space_read_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
933 #define bus_set_multi_stream_8(r, o, v, c) \
934 bus_space_set_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
935 #define bus_set_region_stream_8(r, o, v, c) \
936 bus_space_set_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
937 #define bus_write_stream_8(r, o, v) \
938 bus_space_write_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
939 #define bus_write_multi_stream_8(r, o, d, c) \
940 bus_space_write_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
941 #define bus_write_region_stream_8(r, o, d, c) \
942 bus_space_write_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
945 #endif /* !_SYS_BUS_H_ */