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 */
98 * @brief Device request structure used for ioctl's.
100 * Used for ioctl's on /dev/devctl2. All device ioctl's
101 * must have parameter definitions which begin with dr_name.
103 struct devreq_buffer {
110 int dr_flags; /* request-specific flags */
112 struct devreq_buffer dru_buffer;
115 #define dr_buffer dr_dru.dru_buffer /* variable-sized buffer */
116 #define dr_data dr_dru.dru_data /* fixed-size buffer */
119 #define DEV_ATTACH _IOW('D', 1, struct devreq)
120 #define DEV_DETACH _IOW('D', 2, struct devreq)
121 #define DEV_ENABLE _IOW('D', 3, struct devreq)
122 #define DEV_DISABLE _IOW('D', 4, struct devreq)
123 #define DEV_SUSPEND _IOW('D', 5, struct devreq)
124 #define DEV_RESUME _IOW('D', 6, struct devreq)
125 #define DEV_SET_DRIVER _IOW('D', 7, struct devreq)
126 #define DEV_CLEAR_DRIVER _IOW('D', 8, struct devreq)
127 #define DEV_RESCAN _IOW('D', 9, struct devreq)
128 #define DEV_DELETE _IOW('D', 10, struct devreq)
130 /* Flags for DEV_DETACH and DEV_DISABLE. */
131 #define DEVF_FORCE_DETACH 0x0000001
133 /* Flags for DEV_SET_DRIVER. */
134 #define DEVF_SET_DRIVER_DETACH 0x0000001 /* Detach existing driver. */
136 /* Flags for DEV_CLEAR_DRIVER. */
137 #define DEVF_CLEAR_DRIVER_DETACH 0x0000001 /* Detach existing driver. */
139 /* Flags for DEV_DELETE. */
140 #define DEVF_FORCE_DELETE 0x0000001
144 #include <sys/eventhandler.h>
145 #include <sys/kobj.h>
148 * devctl hooks. Typically one should use the devctl_notify
149 * hook to send the message. However, devctl_queue_data is also
150 * included in case devctl_notify isn't sufficiently general.
152 boolean_t devctl_process_running(void);
153 void devctl_notify_f(const char *__system, const char *__subsystem,
154 const char *__type, const char *__data, int __flags);
155 void devctl_notify(const char *__system, const char *__subsystem,
156 const char *__type, const char *__data);
157 void devctl_queue_data_f(char *__data, int __flags);
158 void devctl_queue_data(char *__data);
160 void devctl_safe_quote_sb(struct sbuf *__sb, const char *__src);
163 * Device name parsers. Hook to allow device enumerators to map
164 * scheme-specific names to a device.
166 typedef void (*dev_lookup_fn)(void *arg, const char *name,
168 EVENTHANDLER_DECLARE(dev_lookup, dev_lookup_fn);
171 * @brief A device driver (included mainly for compatibility with
174 typedef struct kobj_class driver_t;
177 * @brief A device class
179 * The devclass object has two main functions in the system. The first
180 * is to manage the allocation of unit numbers for device instances
181 * and the second is to hold the list of device drivers for a
182 * particular bus type. Each devclass has a name and there cannot be
183 * two devclasses with the same name. This ensures that unique unit
184 * numbers are allocated to device instances.
186 * Drivers that support several different bus attachments (e.g. isa,
187 * pci, pccard) should all use the same devclass to ensure that unit
188 * numbers do not conflict.
190 * Each devclass may also have a parent devclass. This is used when
191 * searching for device drivers to allow a form of inheritance. When
192 * matching drivers with devices, first the driver list of the parent
193 * device's devclass is searched. If no driver is found in that list,
194 * the search continues in the parent devclass (if any).
196 typedef struct devclass *devclass_t;
199 * @brief A device method
201 #define device_method_t kobj_method_t
204 * @brief Driver interrupt filter return values
206 * If a driver provides an interrupt filter routine it must return an
207 * integer consisting of oring together zero or more of the following
210 * FILTER_STRAY - this device did not trigger the interrupt
211 * FILTER_HANDLED - the interrupt has been fully handled and can be EOId
212 * FILTER_SCHEDULE_THREAD - the threaded interrupt handler should be
213 * scheduled to execute
215 * If the driver does not provide a filter, then the interrupt code will
216 * act is if the filter had returned FILTER_SCHEDULE_THREAD. Note that it
217 * is illegal to specify any other flag with FILTER_STRAY and that it is
218 * illegal to not specify either of FILTER_HANDLED or FILTER_SCHEDULE_THREAD
219 * if FILTER_STRAY is not specified.
221 #define FILTER_STRAY 0x01
222 #define FILTER_HANDLED 0x02
223 #define FILTER_SCHEDULE_THREAD 0x04
226 * @brief Driver interrupt service routines
228 * The filter routine is run in primary interrupt context and may not
229 * block or use regular mutexes. It may only use spin mutexes for
230 * synchronization. The filter may either completely handle the
231 * interrupt or it may perform some of the work and defer more
232 * expensive work to the regular interrupt handler. If a filter
233 * routine is not registered by the driver, then the regular interrupt
234 * handler is always used to handle interrupts from this device.
236 * The regular interrupt handler executes in its own thread context
237 * and may use regular mutexes. However, it is prohibited from
238 * sleeping on a sleep queue.
240 typedef int driver_filter_t(void*);
241 typedef void driver_intr_t(void*);
244 * @brief Interrupt type bits.
246 * These flags are used both by newbus interrupt
247 * registration (nexus.c) and also in struct intrec, which defines
248 * interrupt properties.
250 * XXX We should probably revisit this and remove the vestiges of the
251 * spls implicit in names like INTR_TYPE_TTY. In the meantime, don't
252 * confuse things by renaming them (Grog, 18 July 2000).
254 * Buses which do interrupt remapping will want to change their type
255 * to reflect what sort of devices are underneath.
265 INTR_EXCL = 256, /* exclusive interrupt */
266 INTR_MPSAFE = 512, /* this interrupt is SMP safe */
267 INTR_ENTROPY = 1024, /* this interrupt provides entropy */
268 INTR_MD1 = 4096, /* flag reserved for MD use */
269 INTR_MD2 = 8192, /* flag reserved for MD use */
270 INTR_MD3 = 16384, /* flag reserved for MD use */
271 INTR_MD4 = 32768 /* flag reserved for MD use */
275 INTR_TRIGGER_INVALID = -1,
276 INTR_TRIGGER_CONFORM = 0,
277 INTR_TRIGGER_EDGE = 1,
278 INTR_TRIGGER_LEVEL = 2
282 INTR_POLARITY_CONFORM = 0,
283 INTR_POLARITY_HIGH = 1,
284 INTR_POLARITY_LOW = 2
288 * CPU sets supported by bus_get_cpus(). Note that not all sets may be
289 * supported for a given device. If a request is not supported by a
290 * device (or its parents), then bus_get_cpus() will fail with EINVAL.
297 typedef int (*devop_t)(void);
300 * @brief This structure is deprecated.
302 * Use the kobj(9) macro DEFINE_CLASS to
303 * declare classes which implement device drivers.
310 * @brief A resource mapping.
312 struct resource_map {
313 bus_space_tag_t r_bustag;
314 bus_space_handle_t r_bushandle;
320 * @brief Optional properties of a resource mapping request.
322 struct resource_map_request {
326 vm_memattr_t memattr;
329 void resource_init_map_request_impl(struct resource_map_request *_args,
331 #define resource_init_map_request(rmr) \
332 resource_init_map_request_impl((rmr), sizeof(*(rmr)))
335 * Definitions for drivers which need to keep simple lists of resources
336 * for their child devices.
341 * @brief An entry for a single resource in a resource list.
343 struct resource_list_entry {
344 STAILQ_ENTRY(resource_list_entry) link;
345 int type; /**< @brief type argument to alloc_resource */
346 int rid; /**< @brief resource identifier */
347 int flags; /**< @brief resource flags */
348 struct resource *res; /**< @brief the real resource when allocated */
349 rman_res_t start; /**< @brief start of resource range */
350 rman_res_t end; /**< @brief end of resource range */
351 rman_res_t count; /**< @brief count within range */
353 STAILQ_HEAD(resource_list, resource_list_entry);
355 #define RLE_RESERVED 0x0001 /* Reserved by the parent bus. */
356 #define RLE_ALLOCATED 0x0002 /* Reserved resource is allocated. */
357 #define RLE_PREFETCH 0x0004 /* Resource is a prefetch range. */
359 void resource_list_init(struct resource_list *rl);
360 void resource_list_free(struct resource_list *rl);
361 struct resource_list_entry *
362 resource_list_add(struct resource_list *rl,
364 rman_res_t start, rman_res_t end, rman_res_t count);
365 int resource_list_add_next(struct resource_list *rl,
367 rman_res_t start, rman_res_t end, rman_res_t count);
368 int resource_list_busy(struct resource_list *rl,
370 int resource_list_reserved(struct resource_list *rl, int type, int rid);
371 struct resource_list_entry*
372 resource_list_find(struct resource_list *rl,
374 void resource_list_delete(struct resource_list *rl,
377 resource_list_alloc(struct resource_list *rl,
378 device_t bus, device_t child,
380 rman_res_t start, rman_res_t end,
381 rman_res_t count, u_int flags);
382 int resource_list_release(struct resource_list *rl,
383 device_t bus, device_t child,
384 int type, int rid, struct resource *res);
385 int resource_list_release_active(struct resource_list *rl,
386 device_t bus, device_t child,
389 resource_list_reserve(struct resource_list *rl,
390 device_t bus, device_t child,
392 rman_res_t start, rman_res_t end,
393 rman_res_t count, u_int flags);
394 int resource_list_unreserve(struct resource_list *rl,
395 device_t bus, device_t child,
397 void resource_list_purge(struct resource_list *rl);
398 int resource_list_print_type(struct resource_list *rl,
399 const char *name, int type,
403 * The root bus, to which all top-level buses are attached.
405 extern device_t root_bus;
406 extern devclass_t root_devclass;
407 void root_bus_configure(void);
410 * Useful functions for implementing buses.
413 int bus_generic_activate_resource(device_t dev, device_t child, int type,
414 int rid, struct resource *r);
416 bus_generic_add_child(device_t dev, u_int order, const char *name,
418 int bus_generic_adjust_resource(device_t bus, device_t child, int type,
419 struct resource *r, rman_res_t start,
422 bus_generic_alloc_resource(device_t bus, device_t child, int type,
423 int *rid, rman_res_t start, rman_res_t end,
424 rman_res_t count, u_int flags);
425 int bus_generic_attach(device_t dev);
426 int bus_generic_bind_intr(device_t dev, device_t child,
427 struct resource *irq, int cpu);
428 int bus_generic_child_present(device_t dev, device_t child);
429 int bus_generic_config_intr(device_t, int, enum intr_trigger,
431 int bus_generic_describe_intr(device_t dev, device_t child,
432 struct resource *irq, void *cookie,
434 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
435 int rid, struct resource *r);
436 int bus_generic_detach(device_t dev);
437 void bus_generic_driver_added(device_t dev, driver_t *driver);
438 int bus_generic_get_cpus(device_t dev, device_t child, enum cpu_sets op,
439 size_t setsize, struct _cpuset *cpuset);
441 bus_generic_get_dma_tag(device_t dev, device_t child);
443 bus_generic_get_bus_tag(device_t dev, device_t child);
444 int bus_generic_get_domain(device_t dev, device_t child, int *domain);
445 struct resource_list *
446 bus_generic_get_resource_list (device_t, device_t);
447 int bus_generic_map_resource(device_t dev, device_t child, int type,
449 struct resource_map_request *args,
450 struct resource_map *map);
451 void bus_generic_new_pass(device_t dev);
452 int bus_print_child_header(device_t dev, device_t child);
453 int bus_print_child_domain(device_t dev, device_t child);
454 int bus_print_child_footer(device_t dev, device_t child);
455 int bus_generic_print_child(device_t dev, device_t child);
456 int bus_generic_probe(device_t dev);
457 int bus_generic_read_ivar(device_t dev, device_t child, int which,
459 int bus_generic_release_resource(device_t bus, device_t child,
460 int type, int rid, struct resource *r);
461 int bus_generic_resume(device_t dev);
462 int bus_generic_resume_child(device_t dev, device_t child);
463 int bus_generic_setup_intr(device_t dev, device_t child,
464 struct resource *irq, int flags,
465 driver_filter_t *filter, driver_intr_t *intr,
466 void *arg, void **cookiep);
469 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
470 rman_res_t, rman_res_t, rman_res_t, u_int);
471 void bus_generic_rl_delete_resource (device_t, device_t, int, int);
472 int bus_generic_rl_get_resource (device_t, device_t, int, int, rman_res_t *,
474 int bus_generic_rl_set_resource (device_t, device_t, int, int, rman_res_t,
476 int bus_generic_rl_release_resource (device_t, device_t, int, int,
479 int bus_generic_shutdown(device_t dev);
480 int bus_generic_suspend(device_t dev);
481 int bus_generic_suspend_child(device_t dev, device_t child);
482 int bus_generic_teardown_intr(device_t dev, device_t child,
483 struct resource *irq, void *cookie);
484 int bus_generic_unmap_resource(device_t dev, device_t child, int type,
486 struct resource_map *map);
487 int bus_generic_write_ivar(device_t dev, device_t child, int which,
489 int bus_null_rescan(device_t dev);
492 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
496 struct resource_spec {
501 #define RESOURCE_SPEC_END {-1, 0, 0}
503 int bus_alloc_resources(device_t dev, struct resource_spec *rs,
504 struct resource **res);
505 void bus_release_resources(device_t dev, const struct resource_spec *rs,
506 struct resource **res);
508 int bus_adjust_resource(device_t child, int type, struct resource *r,
509 rman_res_t start, rman_res_t end);
510 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
511 rman_res_t start, rman_res_t end,
512 rman_res_t count, u_int flags);
513 int bus_activate_resource(device_t dev, int type, int rid,
515 int bus_deactivate_resource(device_t dev, int type, int rid,
517 int bus_map_resource(device_t dev, int type, struct resource *r,
518 struct resource_map_request *args,
519 struct resource_map *map);
520 int bus_unmap_resource(device_t dev, int type, struct resource *r,
521 struct resource_map *map);
522 int bus_get_cpus(device_t dev, enum cpu_sets op, size_t setsize,
523 struct _cpuset *cpuset);
524 bus_dma_tag_t bus_get_dma_tag(device_t dev);
525 bus_space_tag_t bus_get_bus_tag(device_t dev);
526 int bus_get_domain(device_t dev, int *domain);
527 int bus_release_resource(device_t dev, int type, int rid,
529 int bus_free_resource(device_t dev, int type, struct resource *r);
530 int bus_setup_intr(device_t dev, struct resource *r, int flags,
531 driver_filter_t filter, driver_intr_t handler,
532 void *arg, void **cookiep);
533 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
534 int bus_bind_intr(device_t dev, struct resource *r, int cpu);
535 int bus_describe_intr(device_t dev, struct resource *irq, void *cookie,
536 const char *fmt, ...) __printflike(4, 5);
537 int bus_set_resource(device_t dev, int type, int rid,
538 rman_res_t start, rman_res_t count);
539 int bus_get_resource(device_t dev, int type, int rid,
540 rman_res_t *startp, rman_res_t *countp);
541 rman_res_t bus_get_resource_start(device_t dev, int type, int rid);
542 rman_res_t bus_get_resource_count(device_t dev, int type, int rid);
543 void bus_delete_resource(device_t dev, int type, int rid);
544 int bus_child_present(device_t child);
545 int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen);
546 int bus_child_location_str(device_t child, char *buf, size_t buflen);
547 void bus_enumerate_hinted_children(device_t bus);
549 static __inline struct resource *
550 bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags)
552 return (bus_alloc_resource(dev, type, rid, 0, ~0, 1, flags));
555 static __inline struct resource *
556 bus_alloc_resource_anywhere(device_t dev, int type, int *rid,
557 rman_res_t count, u_int flags)
559 return (bus_alloc_resource(dev, type, rid, 0, ~0, count, flags));
563 * Access functions for device.
565 device_t device_add_child(device_t dev, const char *name, int unit);
566 device_t device_add_child_ordered(device_t dev, u_int order,
567 const char *name, int unit);
568 void device_busy(device_t dev);
569 int device_delete_child(device_t dev, device_t child);
570 int device_delete_children(device_t dev);
571 int device_attach(device_t dev);
572 int device_detach(device_t dev);
573 void device_disable(device_t dev);
574 void device_enable(device_t dev);
575 device_t device_find_child(device_t dev, const char *classname,
577 const char *device_get_desc(device_t dev);
578 devclass_t device_get_devclass(device_t dev);
579 driver_t *device_get_driver(device_t dev);
580 u_int32_t device_get_flags(device_t dev);
581 device_t device_get_parent(device_t dev);
582 int device_get_children(device_t dev, device_t **listp, int *countp);
583 void *device_get_ivars(device_t dev);
584 void device_set_ivars(device_t dev, void *ivars);
585 const char *device_get_name(device_t dev);
586 const char *device_get_nameunit(device_t dev);
587 void *device_get_softc(device_t dev);
588 device_state_t device_get_state(device_t dev);
589 int device_get_unit(device_t dev);
590 struct sysctl_ctx_list *device_get_sysctl_ctx(device_t dev);
591 struct sysctl_oid *device_get_sysctl_tree(device_t dev);
592 int device_has_quiet_children(device_t dev);
593 int device_is_alive(device_t dev); /* did probe succeed? */
594 int device_is_attached(device_t dev); /* did attach succeed? */
595 int device_is_enabled(device_t dev);
596 int device_is_suspended(device_t dev);
597 int device_is_quiet(device_t dev);
598 device_t device_lookup_by_name(const char *name);
599 int device_print_prettyname(device_t dev);
600 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
601 int device_probe(device_t dev);
602 int device_probe_and_attach(device_t dev);
603 int device_probe_child(device_t bus, device_t dev);
604 int device_quiesce(device_t dev);
605 void device_quiet(device_t dev);
606 void device_quiet_children(device_t dev);
607 void device_set_desc(device_t dev, const char* desc);
608 void device_set_desc_copy(device_t dev, const char* desc);
609 int device_set_devclass(device_t dev, const char *classname);
610 int device_set_devclass_fixed(device_t dev, const char *classname);
611 int device_set_driver(device_t dev, driver_t *driver);
612 void device_set_flags(device_t dev, u_int32_t flags);
613 void device_set_softc(device_t dev, void *softc);
614 void device_free_softc(void *softc);
615 void device_claim_softc(device_t dev);
616 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
617 int device_shutdown(device_t dev);
618 void device_unbusy(device_t dev);
619 void device_verbose(device_t dev);
622 * Access functions for devclass.
624 int devclass_add_driver(devclass_t dc, driver_t *driver,
625 int pass, devclass_t *dcp);
626 devclass_t devclass_create(const char *classname);
627 int devclass_delete_driver(devclass_t busclass, driver_t *driver);
628 devclass_t devclass_find(const char *classname);
629 const char *devclass_get_name(devclass_t dc);
630 device_t devclass_get_device(devclass_t dc, int unit);
631 void *devclass_get_softc(devclass_t dc, int unit);
632 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
633 int devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp);
634 int devclass_get_count(devclass_t dc);
635 int devclass_get_maxunit(devclass_t dc);
636 int devclass_find_free_unit(devclass_t dc, int unit);
637 void devclass_set_parent(devclass_t dc, devclass_t pdc);
638 devclass_t devclass_get_parent(devclass_t dc);
639 struct sysctl_ctx_list *devclass_get_sysctl_ctx(devclass_t dc);
640 struct sysctl_oid *devclass_get_sysctl_tree(devclass_t dc);
643 * Access functions for device resources.
645 int resource_int_value(const char *name, int unit, const char *resname,
647 int resource_long_value(const char *name, int unit, const char *resname,
649 int resource_string_value(const char *name, int unit, const char *resname,
650 const char **result);
651 int resource_disabled(const char *name, int unit);
652 int resource_find_match(int *anchor, const char **name, int *unit,
653 const char *resname, const char *value);
654 int resource_find_dev(int *anchor, const char *name, int *unit,
655 const char *resname, const char *value);
656 int resource_unset_value(const char *name, int unit, const char *resname);
659 * Functions for maintaining and checking consistency of
660 * bus information exported to userspace.
662 int bus_data_generation_check(int generation);
663 void bus_data_generation_update(void);
666 * Some convenience defines for probe routines to return. These are just
667 * suggested values, and there's nothing magical about them.
668 * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no
669 * possible other driver may exist (typically legacy drivers who don't follow
670 * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the
671 * suggested value that vendor supplied drivers use. This is for source or
672 * binary drivers that are not yet integrated into the FreeBSD tree. Its use
673 * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value
674 * for drivers to use. It is intended that nearly all of the drivers in the
675 * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that
676 * have special requirements like when there are two drivers that support
677 * overlapping series of hardware devices. In this case the one that supports
678 * the older part of the line would return this value, while the one that
679 * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC
680 * is for drivers that wish to have a generic form and a specialized form,
681 * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is
682 * for those buses that implement a generic device placeholder for devices on
683 * the bus that have no more specific driver for them (aka ugen).
684 * BUS_PROBE_NOWILDCARD or lower means that the device isn't really bidding
685 * for a device node, but accepts only devices that its parent has told it
688 #define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */
689 #define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */
690 #define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */
691 #define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */
692 #define BUS_PROBE_GENERIC (-100) /* generic driver for dev */
693 #define BUS_PROBE_HOOVER (-1000000) /* Driver for any dev on bus */
694 #define BUS_PROBE_NOWILDCARD (-2000000000) /* No wildcard device matches */
697 * During boot, the device tree is scanned multiple times. Each scan,
698 * or pass, drivers may be attached to devices. Each driver
699 * attachment is assigned a pass number. Drivers may only probe and
700 * attach to devices if their pass number is less than or equal to the
701 * current system-wide pass number. The default pass is the last pass
702 * and is used by most drivers. Drivers needed by the scheduler are
703 * probed in earlier passes.
705 #define BUS_PASS_ROOT 0 /* Used to attach root0. */
706 #define BUS_PASS_BUS 10 /* Buses and bridges. */
707 #define BUS_PASS_CPU 20 /* CPU devices. */
708 #define BUS_PASS_RESOURCE 30 /* Resource discovery. */
709 #define BUS_PASS_INTERRUPT 40 /* Interrupt controllers. */
710 #define BUS_PASS_TIMER 50 /* Timers and clocks. */
711 #define BUS_PASS_SCHEDULER 60 /* Start scheduler. */
712 #define BUS_PASS_SUPPORTDEV 100000 /* Drivers which support DEFAULT drivers. */
713 #define BUS_PASS_DEFAULT __INT_MAX /* Everything else. */
715 #define BUS_PASS_ORDER_FIRST 0
716 #define BUS_PASS_ORDER_EARLY 2
717 #define BUS_PASS_ORDER_MIDDLE 5
718 #define BUS_PASS_ORDER_LATE 7
719 #define BUS_PASS_ORDER_LAST 9
721 extern int bus_current_pass;
723 void bus_set_pass(int pass);
726 * Shorthands for constructing method tables.
728 #define DEVMETHOD KOBJMETHOD
729 #define DEVMETHOD_END KOBJMETHOD_END
732 * Some common device interfaces.
734 #include "device_if.h"
739 int driver_module_handler(struct module *, int, void *);
742 * Module support for automatically adding drivers to buses.
744 struct driver_module_data {
745 int (*dmd_chainevh)(struct module *, int, void *);
747 const char *dmd_busname;
748 kobj_class_t dmd_driver;
749 devclass_t *dmd_devclass;
753 #define EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
754 evh, arg, order, pass) \
756 static struct driver_module_data name##_##busname##_driver_mod = { \
759 (kobj_class_t) &driver, \
764 static moduledata_t name##_##busname##_mod = { \
765 #busname "/" #name, \
766 driver_module_handler, \
767 &name##_##busname##_driver_mod \
769 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
770 SI_SUB_DRIVERS, order)
772 #define EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, pass) \
773 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
774 evh, arg, SI_ORDER_MIDDLE, pass)
776 #define DRIVER_MODULE_ORDERED(name, busname, driver, devclass, evh, arg,\
778 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
779 evh, arg, order, BUS_PASS_DEFAULT)
781 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
782 EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, \
786 * Generic ivar accessor generation macros for bus drivers
788 #define __BUS_ACCESSOR(varp, var, ivarp, ivar, type) \
790 static __inline type varp ## _get_ ## var(device_t dev) \
793 BUS_READ_IVAR(device_get_parent(dev), dev, \
794 ivarp ## _IVAR_ ## ivar, &v); \
798 static __inline void varp ## _set_ ## var(device_t dev, type t) \
800 uintptr_t v = (uintptr_t) t; \
801 BUS_WRITE_IVAR(device_get_parent(dev), dev, \
802 ivarp ## _IVAR_ ## ivar, v); \
806 * Shorthand macros, taking resource argument
807 * Generated with sys/tools/bus_macro.sh
810 #define bus_barrier(r, o, l, f) \
811 bus_space_barrier((r)->r_bustag, (r)->r_bushandle, (o), (l), (f))
812 #define bus_read_1(r, o) \
813 bus_space_read_1((r)->r_bustag, (r)->r_bushandle, (o))
814 #define bus_read_multi_1(r, o, d, c) \
815 bus_space_read_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
816 #define bus_read_region_1(r, o, d, c) \
817 bus_space_read_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
818 #define bus_set_multi_1(r, o, v, c) \
819 bus_space_set_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
820 #define bus_set_region_1(r, o, v, c) \
821 bus_space_set_region_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
822 #define bus_write_1(r, o, v) \
823 bus_space_write_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
824 #define bus_write_multi_1(r, o, d, c) \
825 bus_space_write_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
826 #define bus_write_region_1(r, o, d, c) \
827 bus_space_write_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
828 #define bus_read_stream_1(r, o) \
829 bus_space_read_stream_1((r)->r_bustag, (r)->r_bushandle, (o))
830 #define bus_read_multi_stream_1(r, o, d, c) \
831 bus_space_read_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
832 #define bus_read_region_stream_1(r, o, d, c) \
833 bus_space_read_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
834 #define bus_set_multi_stream_1(r, o, v, c) \
835 bus_space_set_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
836 #define bus_set_region_stream_1(r, o, v, c) \
837 bus_space_set_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
838 #define bus_write_stream_1(r, o, v) \
839 bus_space_write_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
840 #define bus_write_multi_stream_1(r, o, d, c) \
841 bus_space_write_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
842 #define bus_write_region_stream_1(r, o, d, c) \
843 bus_space_write_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
844 #define bus_read_2(r, o) \
845 bus_space_read_2((r)->r_bustag, (r)->r_bushandle, (o))
846 #define bus_read_multi_2(r, o, d, c) \
847 bus_space_read_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
848 #define bus_read_region_2(r, o, d, c) \
849 bus_space_read_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
850 #define bus_set_multi_2(r, o, v, c) \
851 bus_space_set_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
852 #define bus_set_region_2(r, o, v, c) \
853 bus_space_set_region_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
854 #define bus_write_2(r, o, v) \
855 bus_space_write_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
856 #define bus_write_multi_2(r, o, d, c) \
857 bus_space_write_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
858 #define bus_write_region_2(r, o, d, c) \
859 bus_space_write_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
860 #define bus_read_stream_2(r, o) \
861 bus_space_read_stream_2((r)->r_bustag, (r)->r_bushandle, (o))
862 #define bus_read_multi_stream_2(r, o, d, c) \
863 bus_space_read_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
864 #define bus_read_region_stream_2(r, o, d, c) \
865 bus_space_read_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
866 #define bus_set_multi_stream_2(r, o, v, c) \
867 bus_space_set_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
868 #define bus_set_region_stream_2(r, o, v, c) \
869 bus_space_set_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
870 #define bus_write_stream_2(r, o, v) \
871 bus_space_write_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
872 #define bus_write_multi_stream_2(r, o, d, c) \
873 bus_space_write_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
874 #define bus_write_region_stream_2(r, o, d, c) \
875 bus_space_write_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
876 #define bus_read_4(r, o) \
877 bus_space_read_4((r)->r_bustag, (r)->r_bushandle, (o))
878 #define bus_read_multi_4(r, o, d, c) \
879 bus_space_read_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
880 #define bus_read_region_4(r, o, d, c) \
881 bus_space_read_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
882 #define bus_set_multi_4(r, o, v, c) \
883 bus_space_set_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
884 #define bus_set_region_4(r, o, v, c) \
885 bus_space_set_region_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
886 #define bus_write_4(r, o, v) \
887 bus_space_write_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
888 #define bus_write_multi_4(r, o, d, c) \
889 bus_space_write_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
890 #define bus_write_region_4(r, o, d, c) \
891 bus_space_write_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
892 #define bus_read_stream_4(r, o) \
893 bus_space_read_stream_4((r)->r_bustag, (r)->r_bushandle, (o))
894 #define bus_read_multi_stream_4(r, o, d, c) \
895 bus_space_read_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
896 #define bus_read_region_stream_4(r, o, d, c) \
897 bus_space_read_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
898 #define bus_set_multi_stream_4(r, o, v, c) \
899 bus_space_set_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
900 #define bus_set_region_stream_4(r, o, v, c) \
901 bus_space_set_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
902 #define bus_write_stream_4(r, o, v) \
903 bus_space_write_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
904 #define bus_write_multi_stream_4(r, o, d, c) \
905 bus_space_write_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
906 #define bus_write_region_stream_4(r, o, d, c) \
907 bus_space_write_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
908 #define bus_read_8(r, o) \
909 bus_space_read_8((r)->r_bustag, (r)->r_bushandle, (o))
910 #define bus_read_multi_8(r, o, d, c) \
911 bus_space_read_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
912 #define bus_read_region_8(r, o, d, c) \
913 bus_space_read_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
914 #define bus_set_multi_8(r, o, v, c) \
915 bus_space_set_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
916 #define bus_set_region_8(r, o, v, c) \
917 bus_space_set_region_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
918 #define bus_write_8(r, o, v) \
919 bus_space_write_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
920 #define bus_write_multi_8(r, o, d, c) \
921 bus_space_write_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
922 #define bus_write_region_8(r, o, d, c) \
923 bus_space_write_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
924 #define bus_read_stream_8(r, o) \
925 bus_space_read_stream_8((r)->r_bustag, (r)->r_bushandle, (o))
926 #define bus_read_multi_stream_8(r, o, d, c) \
927 bus_space_read_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
928 #define bus_read_region_stream_8(r, o, d, c) \
929 bus_space_read_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
930 #define bus_set_multi_stream_8(r, o, v, c) \
931 bus_space_set_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
932 #define bus_set_region_stream_8(r, o, v, c) \
933 bus_space_set_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
934 #define bus_write_stream_8(r, o, v) \
935 bus_space_write_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
936 #define bus_write_multi_stream_8(r, o, d, c) \
937 bus_space_write_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
938 #define bus_write_region_stream_8(r, o, d, c) \
939 bus_space_write_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
942 #endif /* !_SYS_BUS_H_ */