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)
120 #define DEV_RESCAN _IOW('D', 9, struct devreq)
121 #define DEV_DELETE _IOW('D', 10, struct devreq)
123 /* Flags for DEV_DETACH and DEV_DISABLE. */
124 #define DEVF_FORCE_DETACH 0x0000001
126 /* Flags for DEV_SET_DRIVER. */
127 #define DEVF_SET_DRIVER_DETACH 0x0000001 /* Detach existing driver. */
129 /* Flags for DEV_DELETE. */
130 #define DEVF_FORCE_DELETE 0x0000001
134 #include <sys/eventhandler.h>
135 #include <sys/kobj.h>
138 * devctl hooks. Typically one should use the devctl_notify
139 * hook to send the message. However, devctl_queue_data is also
140 * included in case devctl_notify isn't sufficiently general.
142 boolean_t devctl_process_running(void);
143 void devctl_notify_f(const char *__system, const char *__subsystem,
144 const char *__type, const char *__data, int __flags);
145 void devctl_notify(const char *__system, const char *__subsystem,
146 const char *__type, const char *__data);
147 void devctl_queue_data_f(char *__data, int __flags);
148 void devctl_queue_data(char *__data);
149 void devctl_safe_quote(char *__dst, const char *__src, size_t len);
152 * Device name parsers. Hook to allow device enumerators to map
153 * scheme-specific names to a device.
155 typedef void (*dev_lookup_fn)(void *arg, const char *name,
157 EVENTHANDLER_DECLARE(dev_lookup, dev_lookup_fn);
160 * @brief A device driver (included mainly for compatibility with
163 typedef struct kobj_class driver_t;
166 * @brief A device class
168 * The devclass object has two main functions in the system. The first
169 * is to manage the allocation of unit numbers for device instances
170 * and the second is to hold the list of device drivers for a
171 * particular bus type. Each devclass has a name and there cannot be
172 * two devclasses with the same name. This ensures that unique unit
173 * numbers are allocated to device instances.
175 * Drivers that support several different bus attachments (e.g. isa,
176 * pci, pccard) should all use the same devclass to ensure that unit
177 * numbers do not conflict.
179 * Each devclass may also have a parent devclass. This is used when
180 * searching for device drivers to allow a form of inheritance. When
181 * matching drivers with devices, first the driver list of the parent
182 * device's devclass is searched. If no driver is found in that list,
183 * the search continues in the parent devclass (if any).
185 typedef struct devclass *devclass_t;
188 * @brief A device method
190 #define device_method_t kobj_method_t
193 * @brief Driver interrupt filter return values
195 * If a driver provides an interrupt filter routine it must return an
196 * integer consisting of oring together zero or more of the following
199 * FILTER_STRAY - this device did not trigger the interrupt
200 * FILTER_HANDLED - the interrupt has been fully handled and can be EOId
201 * FILTER_SCHEDULE_THREAD - the threaded interrupt handler should be
202 * scheduled to execute
204 * If the driver does not provide a filter, then the interrupt code will
205 * act is if the filter had returned FILTER_SCHEDULE_THREAD. Note that it
206 * is illegal to specify any other flag with FILTER_STRAY and that it is
207 * illegal to not specify either of FILTER_HANDLED or FILTER_SCHEDULE_THREAD
208 * if FILTER_STRAY is not specified.
210 #define FILTER_STRAY 0x01
211 #define FILTER_HANDLED 0x02
212 #define FILTER_SCHEDULE_THREAD 0x04
215 * @brief Driver interrupt service routines
217 * The filter routine is run in primary interrupt context and may not
218 * block or use regular mutexes. It may only use spin mutexes for
219 * synchronization. The filter may either completely handle the
220 * interrupt or it may perform some of the work and defer more
221 * expensive work to the regular interrupt handler. If a filter
222 * routine is not registered by the driver, then the regular interrupt
223 * handler is always used to handle interrupts from this device.
225 * The regular interrupt handler executes in its own thread context
226 * and may use regular mutexes. However, it is prohibited from
227 * sleeping on a sleep queue.
229 typedef int driver_filter_t(void*);
230 typedef void driver_intr_t(void*);
233 * @brief Interrupt type bits.
235 * These flags are used both by newbus interrupt
236 * registration (nexus.c) and also in struct intrec, which defines
237 * interrupt properties.
239 * XXX We should probably revisit this and remove the vestiges of the
240 * spls implicit in names like INTR_TYPE_TTY. In the meantime, don't
241 * confuse things by renaming them (Grog, 18 July 2000).
243 * Buses which do interrupt remapping will want to change their type
244 * to reflect what sort of devices are underneath.
254 INTR_EXCL = 256, /* exclusive interrupt */
255 INTR_MPSAFE = 512, /* this interrupt is SMP safe */
256 INTR_ENTROPY = 1024, /* this interrupt provides entropy */
257 INTR_MD1 = 4096, /* flag reserved for MD use */
258 INTR_MD2 = 8192, /* flag reserved for MD use */
259 INTR_MD3 = 16384, /* flag reserved for MD use */
260 INTR_MD4 = 32768 /* flag reserved for MD use */
264 INTR_TRIGGER_CONFORM = 0,
265 INTR_TRIGGER_EDGE = 1,
266 INTR_TRIGGER_LEVEL = 2
270 INTR_POLARITY_CONFORM = 0,
271 INTR_POLARITY_HIGH = 1,
272 INTR_POLARITY_LOW = 2
276 * CPU sets supported by bus_get_cpus(). Note that not all sets may be
277 * supported for a given device. If a request is not supported by a
278 * device (or its parents), then bus_get_cpus() will fail with EINVAL.
285 typedef int (*devop_t)(void);
288 * @brief This structure is deprecated.
290 * Use the kobj(9) macro DEFINE_CLASS to
291 * declare classes which implement device drivers.
298 * Definitions for drivers which need to keep simple lists of resources
299 * for their child devices.
304 * @brief An entry for a single resource in a resource list.
306 struct resource_list_entry {
307 STAILQ_ENTRY(resource_list_entry) link;
308 int type; /**< @brief type argument to alloc_resource */
309 int rid; /**< @brief resource identifier */
310 int flags; /**< @brief resource flags */
311 struct resource *res; /**< @brief the real resource when allocated */
312 rman_res_t start; /**< @brief start of resource range */
313 rman_res_t end; /**< @brief end of resource range */
314 rman_res_t count; /**< @brief count within range */
316 STAILQ_HEAD(resource_list, resource_list_entry);
318 #define RLE_RESERVED 0x0001 /* Reserved by the parent bus. */
319 #define RLE_ALLOCATED 0x0002 /* Reserved resource is allocated. */
320 #define RLE_PREFETCH 0x0004 /* Resource is a prefetch range. */
322 void resource_list_init(struct resource_list *rl);
323 void resource_list_free(struct resource_list *rl);
324 struct resource_list_entry *
325 resource_list_add(struct resource_list *rl,
327 rman_res_t start, rman_res_t end, rman_res_t count);
328 int resource_list_add_next(struct resource_list *rl,
330 rman_res_t start, rman_res_t end, rman_res_t count);
331 int resource_list_busy(struct resource_list *rl,
333 int resource_list_reserved(struct resource_list *rl, int type, int rid);
334 struct resource_list_entry*
335 resource_list_find(struct resource_list *rl,
337 void resource_list_delete(struct resource_list *rl,
340 resource_list_alloc(struct resource_list *rl,
341 device_t bus, device_t child,
343 rman_res_t start, rman_res_t end,
344 rman_res_t count, u_int flags);
345 int resource_list_release(struct resource_list *rl,
346 device_t bus, device_t child,
347 int type, int rid, struct resource *res);
348 int resource_list_release_active(struct resource_list *rl,
349 device_t bus, device_t child,
352 resource_list_reserve(struct resource_list *rl,
353 device_t bus, device_t child,
355 rman_res_t start, rman_res_t end,
356 rman_res_t count, u_int flags);
357 int resource_list_unreserve(struct resource_list *rl,
358 device_t bus, device_t child,
360 void resource_list_purge(struct resource_list *rl);
361 int resource_list_print_type(struct resource_list *rl,
362 const char *name, int type,
366 * The root bus, to which all top-level busses are attached.
368 extern device_t root_bus;
369 extern devclass_t root_devclass;
370 void root_bus_configure(void);
373 * Useful functions for implementing busses.
376 int bus_generic_activate_resource(device_t dev, device_t child, int type,
377 int rid, struct resource *r);
379 bus_generic_add_child(device_t dev, u_int order, const char *name,
381 int bus_generic_adjust_resource(device_t bus, device_t child, int type,
382 struct resource *r, rman_res_t start,
385 bus_generic_alloc_resource(device_t bus, device_t child, int type,
386 int *rid, rman_res_t start, rman_res_t end,
387 rman_res_t count, u_int flags);
388 int bus_generic_attach(device_t dev);
389 int bus_generic_bind_intr(device_t dev, device_t child,
390 struct resource *irq, int cpu);
391 int bus_generic_child_present(device_t dev, device_t child);
392 int bus_generic_config_intr(device_t, int, enum intr_trigger,
394 int bus_generic_describe_intr(device_t dev, device_t child,
395 struct resource *irq, void *cookie,
397 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
398 int rid, struct resource *r);
399 int bus_generic_detach(device_t dev);
400 void bus_generic_driver_added(device_t dev, driver_t *driver);
401 int bus_generic_get_cpus(device_t dev, device_t child, enum cpu_sets op,
402 size_t setsize, struct _cpuset *cpuset);
404 bus_generic_get_dma_tag(device_t dev, device_t child);
406 bus_generic_get_bus_tag(device_t dev, device_t child);
407 int bus_generic_get_domain(device_t dev, device_t child, int *domain);
408 struct resource_list *
409 bus_generic_get_resource_list (device_t, device_t);
410 void bus_generic_new_pass(device_t dev);
411 int bus_print_child_header(device_t dev, device_t child);
412 int bus_print_child_domain(device_t dev, device_t child);
413 int bus_print_child_footer(device_t dev, device_t child);
414 int bus_generic_print_child(device_t dev, device_t child);
415 int bus_generic_probe(device_t dev);
416 int bus_generic_read_ivar(device_t dev, device_t child, int which,
418 int bus_generic_release_resource(device_t bus, device_t child,
419 int type, int rid, struct resource *r);
420 int bus_generic_resume(device_t dev);
421 int bus_generic_resume_child(device_t dev, device_t child);
422 int bus_generic_setup_intr(device_t dev, device_t child,
423 struct resource *irq, int flags,
424 driver_filter_t *filter, driver_intr_t *intr,
425 void *arg, void **cookiep);
428 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
429 rman_res_t, rman_res_t, rman_res_t, u_int);
430 void bus_generic_rl_delete_resource (device_t, device_t, int, int);
431 int bus_generic_rl_get_resource (device_t, device_t, int, int, rman_res_t *,
433 int bus_generic_rl_set_resource (device_t, device_t, int, int, rman_res_t,
435 int bus_generic_rl_release_resource (device_t, device_t, int, int,
438 int bus_generic_shutdown(device_t dev);
439 int bus_generic_suspend(device_t dev);
440 int bus_generic_suspend_child(device_t dev, device_t child);
441 int bus_generic_teardown_intr(device_t dev, device_t child,
442 struct resource *irq, void *cookie);
443 int bus_generic_write_ivar(device_t dev, device_t child, int which,
445 int bus_null_rescan(device_t dev);
448 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
452 struct resource_spec {
458 int bus_alloc_resources(device_t dev, struct resource_spec *rs,
459 struct resource **res);
460 void bus_release_resources(device_t dev, const struct resource_spec *rs,
461 struct resource **res);
463 int bus_adjust_resource(device_t child, int type, struct resource *r,
464 rman_res_t start, rman_res_t end);
465 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
466 rman_res_t start, rman_res_t end,
467 rman_res_t count, u_int flags);
468 int bus_activate_resource(device_t dev, int type, int rid,
470 int bus_deactivate_resource(device_t dev, int type, int rid,
472 int bus_get_cpus(device_t dev, enum cpu_sets op, size_t setsize,
473 struct _cpuset *cpuset);
474 bus_dma_tag_t bus_get_dma_tag(device_t dev);
475 bus_space_tag_t bus_get_bus_tag(device_t dev);
476 int bus_get_domain(device_t dev, int *domain);
477 int bus_release_resource(device_t dev, int type, int rid,
479 int bus_free_resource(device_t dev, int type, struct resource *r);
480 int bus_setup_intr(device_t dev, struct resource *r, int flags,
481 driver_filter_t filter, driver_intr_t handler,
482 void *arg, void **cookiep);
483 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
484 int bus_bind_intr(device_t dev, struct resource *r, int cpu);
485 int bus_describe_intr(device_t dev, struct resource *irq, void *cookie,
486 const char *fmt, ...);
487 int bus_set_resource(device_t dev, int type, int rid,
488 rman_res_t start, rman_res_t count);
489 int bus_get_resource(device_t dev, int type, int rid,
490 rman_res_t *startp, rman_res_t *countp);
491 rman_res_t bus_get_resource_start(device_t dev, int type, int rid);
492 rman_res_t bus_get_resource_count(device_t dev, int type, int rid);
493 void bus_delete_resource(device_t dev, int type, int rid);
494 int bus_child_present(device_t child);
495 int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen);
496 int bus_child_location_str(device_t child, char *buf, size_t buflen);
497 void bus_enumerate_hinted_children(device_t bus);
499 static __inline struct resource *
500 bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags)
502 return (bus_alloc_resource(dev, type, rid, 0, ~0, 1, flags));
505 static __inline struct resource *
506 bus_alloc_resource_anywhere(device_t dev, int type, int *rid,
507 rman_res_t count, u_int flags)
509 return (bus_alloc_resource(dev, type, rid, 0, ~0, count, flags));
513 * Access functions for device.
515 device_t device_add_child(device_t dev, const char *name, int unit);
516 device_t device_add_child_ordered(device_t dev, u_int order,
517 const char *name, int unit);
518 void device_busy(device_t dev);
519 int device_delete_child(device_t dev, device_t child);
520 int device_delete_children(device_t dev);
521 int device_attach(device_t dev);
522 int device_detach(device_t dev);
523 void device_disable(device_t dev);
524 void device_enable(device_t dev);
525 device_t device_find_child(device_t dev, const char *classname,
527 const char *device_get_desc(device_t dev);
528 devclass_t device_get_devclass(device_t dev);
529 driver_t *device_get_driver(device_t dev);
530 u_int32_t device_get_flags(device_t dev);
531 device_t device_get_parent(device_t dev);
532 int device_get_children(device_t dev, device_t **listp, int *countp);
533 void *device_get_ivars(device_t dev);
534 void device_set_ivars(device_t dev, void *ivars);
535 const char *device_get_name(device_t dev);
536 const char *device_get_nameunit(device_t dev);
537 void *device_get_softc(device_t dev);
538 device_state_t device_get_state(device_t dev);
539 int device_get_unit(device_t dev);
540 struct sysctl_ctx_list *device_get_sysctl_ctx(device_t dev);
541 struct sysctl_oid *device_get_sysctl_tree(device_t dev);
542 int device_is_alive(device_t dev); /* did probe succeed? */
543 int device_is_attached(device_t dev); /* did attach succeed? */
544 int device_is_enabled(device_t dev);
545 int device_is_suspended(device_t dev);
546 int device_is_quiet(device_t dev);
547 device_t device_lookup_by_name(const char *name);
548 int device_print_prettyname(device_t dev);
549 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
550 int device_probe(device_t dev);
551 int device_probe_and_attach(device_t dev);
552 int device_probe_child(device_t bus, device_t dev);
553 int device_quiesce(device_t dev);
554 void device_quiet(device_t dev);
555 void device_set_desc(device_t dev, const char* desc);
556 void device_set_desc_copy(device_t dev, const char* desc);
557 int device_set_devclass(device_t dev, const char *classname);
558 int device_set_devclass_fixed(device_t dev, const char *classname);
559 int device_set_driver(device_t dev, driver_t *driver);
560 void device_set_flags(device_t dev, u_int32_t flags);
561 void device_set_softc(device_t dev, void *softc);
562 void device_free_softc(void *softc);
563 void device_claim_softc(device_t dev);
564 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
565 int device_shutdown(device_t dev);
566 void device_unbusy(device_t dev);
567 void device_verbose(device_t dev);
570 * Access functions for devclass.
572 int devclass_add_driver(devclass_t dc, driver_t *driver,
573 int pass, devclass_t *dcp);
574 devclass_t devclass_create(const char *classname);
575 int devclass_delete_driver(devclass_t busclass, driver_t *driver);
576 devclass_t devclass_find(const char *classname);
577 const char *devclass_get_name(devclass_t dc);
578 device_t devclass_get_device(devclass_t dc, int unit);
579 void *devclass_get_softc(devclass_t dc, int unit);
580 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
581 int devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp);
582 int devclass_get_count(devclass_t dc);
583 int devclass_get_maxunit(devclass_t dc);
584 int devclass_find_free_unit(devclass_t dc, int unit);
585 void devclass_set_parent(devclass_t dc, devclass_t pdc);
586 devclass_t devclass_get_parent(devclass_t dc);
587 struct sysctl_ctx_list *devclass_get_sysctl_ctx(devclass_t dc);
588 struct sysctl_oid *devclass_get_sysctl_tree(devclass_t dc);
591 * Access functions for device resources.
594 int resource_int_value(const char *name, int unit, const char *resname,
596 int resource_long_value(const char *name, int unit, const char *resname,
598 int resource_string_value(const char *name, int unit, const char *resname,
599 const char **result);
600 int resource_disabled(const char *name, int unit);
601 int resource_find_match(int *anchor, const char **name, int *unit,
602 const char *resname, const char *value);
603 int resource_find_dev(int *anchor, const char *name, int *unit,
604 const char *resname, const char *value);
605 int resource_set_int(const char *name, int unit, const char *resname,
607 int resource_set_long(const char *name, int unit, const char *resname,
609 int resource_set_string(const char *name, int unit, const char *resname,
611 int resource_unset_value(const char *name, int unit, const char *resname);
614 * Functions for maintaining and checking consistency of
615 * bus information exported to userspace.
617 int bus_data_generation_check(int generation);
618 void bus_data_generation_update(void);
621 * Some convenience defines for probe routines to return. These are just
622 * suggested values, and there's nothing magical about them.
623 * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no
624 * possible other driver may exist (typically legacy drivers who don't fallow
625 * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the
626 * suggested value that vendor supplied drivers use. This is for source or
627 * binary drivers that are not yet integrated into the FreeBSD tree. Its use
628 * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value
629 * for drivers to use. It is intended that nearly all of the drivers in the
630 * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that
631 * have special requirements like when there are two drivers that support
632 * overlapping series of hardware devices. In this case the one that supports
633 * the older part of the line would return this value, while the one that
634 * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC
635 * is for drivers that wish to have a generic form and a specialized form,
636 * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is
637 * for those busses that implement a generic device place-holder for devices on
638 * the bus that have no more specific driver for them (aka ugen).
639 * BUS_PROBE_NOWILDCARD or lower means that the device isn't really bidding
640 * for a device node, but accepts only devices that its parent has told it
643 #define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */
644 #define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */
645 #define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */
646 #define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */
647 #define BUS_PROBE_GENERIC (-100) /* generic driver for dev */
648 #define BUS_PROBE_HOOVER (-1000000) /* Driver for any dev on bus */
649 #define BUS_PROBE_NOWILDCARD (-2000000000) /* No wildcard device matches */
652 * During boot, the device tree is scanned multiple times. Each scan,
653 * or pass, drivers may be attached to devices. Each driver
654 * attachment is assigned a pass number. Drivers may only probe and
655 * attach to devices if their pass number is less than or equal to the
656 * current system-wide pass number. The default pass is the last pass
657 * and is used by most drivers. Drivers needed by the scheduler are
658 * probed in earlier passes.
660 #define BUS_PASS_ROOT 0 /* Used to attach root0. */
661 #define BUS_PASS_BUS 10 /* Busses and bridges. */
662 #define BUS_PASS_CPU 20 /* CPU devices. */
663 #define BUS_PASS_RESOURCE 30 /* Resource discovery. */
664 #define BUS_PASS_INTERRUPT 40 /* Interrupt controllers. */
665 #define BUS_PASS_TIMER 50 /* Timers and clocks. */
666 #define BUS_PASS_SCHEDULER 60 /* Start scheduler. */
667 #define BUS_PASS_DEFAULT __INT_MAX /* Everything else. */
669 #define BUS_PASS_ORDER_FIRST 0
670 #define BUS_PASS_ORDER_EARLY 2
671 #define BUS_PASS_ORDER_MIDDLE 5
672 #define BUS_PASS_ORDER_LATE 7
673 #define BUS_PASS_ORDER_LAST 9
675 extern int bus_current_pass;
677 void bus_set_pass(int pass);
680 * Shorthands for constructing method tables.
682 #define DEVMETHOD KOBJMETHOD
683 #define DEVMETHOD_END KOBJMETHOD_END
686 * Some common device interfaces.
688 #include "device_if.h"
693 int driver_module_handler(struct module *, int, void *);
696 * Module support for automatically adding drivers to busses.
698 struct driver_module_data {
699 int (*dmd_chainevh)(struct module *, int, void *);
701 const char *dmd_busname;
702 kobj_class_t dmd_driver;
703 devclass_t *dmd_devclass;
707 #define EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
708 evh, arg, order, pass) \
710 static struct driver_module_data name##_##busname##_driver_mod = { \
713 (kobj_class_t) &driver, \
718 static moduledata_t name##_##busname##_mod = { \
719 #busname "/" #name, \
720 driver_module_handler, \
721 &name##_##busname##_driver_mod \
723 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
724 SI_SUB_DRIVERS, order)
726 #define EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, pass) \
727 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
728 evh, arg, SI_ORDER_MIDDLE, pass)
730 #define DRIVER_MODULE_ORDERED(name, busname, driver, devclass, evh, arg,\
732 EARLY_DRIVER_MODULE_ORDERED(name, busname, driver, devclass, \
733 evh, arg, order, BUS_PASS_DEFAULT)
735 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
736 EARLY_DRIVER_MODULE(name, busname, driver, devclass, evh, arg, \
740 * Generic ivar accessor generation macros for bus drivers
742 #define __BUS_ACCESSOR(varp, var, ivarp, ivar, type) \
744 static __inline type varp ## _get_ ## var(device_t dev) \
747 BUS_READ_IVAR(device_get_parent(dev), dev, \
748 ivarp ## _IVAR_ ## ivar, &v); \
752 static __inline void varp ## _set_ ## var(device_t dev, type t) \
754 uintptr_t v = (uintptr_t) t; \
755 BUS_WRITE_IVAR(device_get_parent(dev), dev, \
756 ivarp ## _IVAR_ ## ivar, v); \
760 * Shorthand macros, taking resource argument
761 * Generated with sys/tools/bus_macro.sh
764 #define bus_barrier(r, o, l, f) \
765 bus_space_barrier((r)->r_bustag, (r)->r_bushandle, (o), (l), (f))
766 #define bus_read_1(r, o) \
767 bus_space_read_1((r)->r_bustag, (r)->r_bushandle, (o))
768 #define bus_read_multi_1(r, o, d, c) \
769 bus_space_read_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
770 #define bus_read_region_1(r, o, d, c) \
771 bus_space_read_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
772 #define bus_set_multi_1(r, o, v, c) \
773 bus_space_set_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
774 #define bus_set_region_1(r, o, v, c) \
775 bus_space_set_region_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
776 #define bus_write_1(r, o, v) \
777 bus_space_write_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
778 #define bus_write_multi_1(r, o, d, c) \
779 bus_space_write_multi_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
780 #define bus_write_region_1(r, o, d, c) \
781 bus_space_write_region_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
782 #define bus_read_stream_1(r, o) \
783 bus_space_read_stream_1((r)->r_bustag, (r)->r_bushandle, (o))
784 #define bus_read_multi_stream_1(r, o, d, c) \
785 bus_space_read_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
786 #define bus_read_region_stream_1(r, o, d, c) \
787 bus_space_read_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
788 #define bus_set_multi_stream_1(r, o, v, c) \
789 bus_space_set_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
790 #define bus_set_region_stream_1(r, o, v, c) \
791 bus_space_set_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
792 #define bus_write_stream_1(r, o, v) \
793 bus_space_write_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (v))
794 #define bus_write_multi_stream_1(r, o, d, c) \
795 bus_space_write_multi_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
796 #define bus_write_region_stream_1(r, o, d, c) \
797 bus_space_write_region_stream_1((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
798 #define bus_read_2(r, o) \
799 bus_space_read_2((r)->r_bustag, (r)->r_bushandle, (o))
800 #define bus_read_multi_2(r, o, d, c) \
801 bus_space_read_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
802 #define bus_read_region_2(r, o, d, c) \
803 bus_space_read_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
804 #define bus_set_multi_2(r, o, v, c) \
805 bus_space_set_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
806 #define bus_set_region_2(r, o, v, c) \
807 bus_space_set_region_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
808 #define bus_write_2(r, o, v) \
809 bus_space_write_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
810 #define bus_write_multi_2(r, o, d, c) \
811 bus_space_write_multi_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
812 #define bus_write_region_2(r, o, d, c) \
813 bus_space_write_region_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
814 #define bus_read_stream_2(r, o) \
815 bus_space_read_stream_2((r)->r_bustag, (r)->r_bushandle, (o))
816 #define bus_read_multi_stream_2(r, o, d, c) \
817 bus_space_read_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
818 #define bus_read_region_stream_2(r, o, d, c) \
819 bus_space_read_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
820 #define bus_set_multi_stream_2(r, o, v, c) \
821 bus_space_set_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
822 #define bus_set_region_stream_2(r, o, v, c) \
823 bus_space_set_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
824 #define bus_write_stream_2(r, o, v) \
825 bus_space_write_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (v))
826 #define bus_write_multi_stream_2(r, o, d, c) \
827 bus_space_write_multi_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
828 #define bus_write_region_stream_2(r, o, d, c) \
829 bus_space_write_region_stream_2((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
830 #define bus_read_4(r, o) \
831 bus_space_read_4((r)->r_bustag, (r)->r_bushandle, (o))
832 #define bus_read_multi_4(r, o, d, c) \
833 bus_space_read_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
834 #define bus_read_region_4(r, o, d, c) \
835 bus_space_read_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
836 #define bus_set_multi_4(r, o, v, c) \
837 bus_space_set_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
838 #define bus_set_region_4(r, o, v, c) \
839 bus_space_set_region_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
840 #define bus_write_4(r, o, v) \
841 bus_space_write_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
842 #define bus_write_multi_4(r, o, d, c) \
843 bus_space_write_multi_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
844 #define bus_write_region_4(r, o, d, c) \
845 bus_space_write_region_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
846 #define bus_read_stream_4(r, o) \
847 bus_space_read_stream_4((r)->r_bustag, (r)->r_bushandle, (o))
848 #define bus_read_multi_stream_4(r, o, d, c) \
849 bus_space_read_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
850 #define bus_read_region_stream_4(r, o, d, c) \
851 bus_space_read_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
852 #define bus_set_multi_stream_4(r, o, v, c) \
853 bus_space_set_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
854 #define bus_set_region_stream_4(r, o, v, c) \
855 bus_space_set_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
856 #define bus_write_stream_4(r, o, v) \
857 bus_space_write_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (v))
858 #define bus_write_multi_stream_4(r, o, d, c) \
859 bus_space_write_multi_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
860 #define bus_write_region_stream_4(r, o, d, c) \
861 bus_space_write_region_stream_4((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
862 #define bus_read_8(r, o) \
863 bus_space_read_8((r)->r_bustag, (r)->r_bushandle, (o))
864 #define bus_read_multi_8(r, o, d, c) \
865 bus_space_read_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
866 #define bus_read_region_8(r, o, d, c) \
867 bus_space_read_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
868 #define bus_set_multi_8(r, o, v, c) \
869 bus_space_set_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
870 #define bus_set_region_8(r, o, v, c) \
871 bus_space_set_region_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
872 #define bus_write_8(r, o, v) \
873 bus_space_write_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
874 #define bus_write_multi_8(r, o, d, c) \
875 bus_space_write_multi_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
876 #define bus_write_region_8(r, o, d, c) \
877 bus_space_write_region_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
878 #define bus_read_stream_8(r, o) \
879 bus_space_read_stream_8((r)->r_bustag, (r)->r_bushandle, (o))
880 #define bus_read_multi_stream_8(r, o, d, c) \
881 bus_space_read_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
882 #define bus_read_region_stream_8(r, o, d, c) \
883 bus_space_read_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
884 #define bus_set_multi_stream_8(r, o, v, c) \
885 bus_space_set_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
886 #define bus_set_region_stream_8(r, o, v, c) \
887 bus_space_set_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v), (c))
888 #define bus_write_stream_8(r, o, v) \
889 bus_space_write_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (v))
890 #define bus_write_multi_stream_8(r, o, d, c) \
891 bus_space_write_multi_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
892 #define bus_write_region_stream_8(r, o, d, c) \
893 bus_space_write_region_stream_8((r)->r_bustag, (r)->r_bushandle, (o), (d), (c))
896 #endif /* !_SYS_BUS_H_ */