2 * Copyright (c) 1997,1998 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
26 * $FreeBSD: src/sys/sys/bus.h,v 1.30.2.5 2004/03/17 17:54:25 njl Exp $
27 * $DragonFly: src/sys/sys/bus.h,v 1.18 2005/10/30 04:41:15 dillon Exp $
35 #include <sys/queue.h>
37 #include <sys/serialize.h>
40 * Forward declarations
42 typedef struct device *device_t;
43 typedef struct kobj_class driver_t;
44 typedef struct devclass *devclass_t;
45 #define device_method_t kobj_method_t
47 typedef void driver_intr_t(void*);
50 * Interrupt features mask. Note that DragonFly no longer implements
53 #define INTR_FAST 0x0080
54 #define INTR_EXCL 0x0100
55 #define INTR_MPSAFE 0x0200
56 #define INTR_ENTROPY 0x0400
57 #define INTR_NOPOLL 0x0800 /* interrupt cannot be polled (e.g. ata) */
60 INTR_TRIGGER_CONFORM = 0,
61 INTR_TRIGGER_EDGE = 1,
62 INTR_TRIGGER_LEVEL = 2
66 INTR_POLARITY_CONFORM = 0,
67 INTR_POLARITY_HIGH = 1,
71 typedef int (*devop_t)(void);
73 typedef enum device_state {
74 DS_NOTPRESENT, /* not probed or probe failed */
75 DS_ALIVE, /* probe succeeded */
76 DS_ATTACHED, /* attach method called */
77 DS_BUSY /* device is open */
81 * Definitions for drivers which need to keep simple lists of resources
82 * for their child devices.
86 struct resource_list_entry {
87 SLIST_ENTRY(resource_list_entry) link;
88 int type; /* type argument to alloc_resource */
89 int rid; /* resource identifier */
90 struct resource *res; /* the real resource when allocated */
91 u_long start; /* start of resource range */
92 u_long end; /* end of resource range */
93 u_long count; /* count within range */
95 SLIST_HEAD(resource_list, resource_list_entry);
98 * Initialise a resource list.
100 void resource_list_init(struct resource_list *rl);
103 * Reclaim memory used by a resource list.
105 void resource_list_free(struct resource_list *rl);
108 * Add a resource entry or modify an existing entry if one exists with
109 * the same type and rid.
111 void resource_list_add(struct resource_list *rl,
113 u_long start, u_long end, u_long count);
116 * Find a resource entry by type and rid.
118 struct resource_list_entry*
119 resource_list_find(struct resource_list *rl,
123 * Delete a resource entry.
125 void resource_list_delete(struct resource_list *rl,
129 * Implement BUS_ALLOC_RESOURCE by looking up a resource from the list
130 * and passing the allocation up to the parent of bus. This assumes
131 * that the first entry of device_get_ivars(child) is a struct
132 * resource_list. This also handles 'passthrough' allocations where a
133 * child is a remote descendant of bus by passing the allocation up to
137 resource_list_alloc(struct resource_list *rl,
138 device_t bus, device_t child,
140 u_long start, u_long end,
141 u_long count, u_int flags);
144 * Implement BUS_RELEASE_RESOURCE.
146 int resource_list_release(struct resource_list *rl,
147 device_t bus, device_t child,
148 int type, int rid, struct resource *res);
151 * Print all resources of a specified type, for use in bus_print_child.
152 * The name is printed if at least one resource of the given type is available.
153 * The format ist used to print resource start and end.
155 int resource_list_print_type(struct resource_list *rl,
156 const char *name, int type,
160 * The root bus, to which all top-level busses are attached.
162 extern device_t root_bus;
163 void root_bus_configure(void);
166 * Useful functions for implementing busses.
169 int bus_generic_activate_resource(device_t dev, device_t child, int type,
170 int rid, struct resource *r);
172 bus_generic_alloc_resource(device_t bus, device_t child,
174 u_long start, u_long end,
175 u_long count, u_int flags);
176 struct resource_list *
177 bus_generic_get_resource_list (device_t, device_t);
179 int bus_generic_config_intr(device_t, int, enum intr_trigger,
181 int bus_generic_attach(device_t dev);
182 int bus_generic_child_present(device_t dev, device_t child);
183 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
184 int rid, struct resource *r);
185 int bus_generic_detach(device_t dev);
186 int bus_generic_disable_intr(device_t dev, device_t child, void *cookie);
187 void bus_generic_driver_added(device_t dev, driver_t *driver);
188 void bus_generic_enable_intr(device_t dev, device_t child, void *cookie);
189 int bus_print_child_header(device_t dev, device_t child);
190 int bus_print_child_footer(device_t dev, device_t child);
191 int bus_generic_print_child(device_t dev, device_t child);
192 int bus_generic_identify(driver_t *driver, device_t parent);
193 int bus_generic_identify_sameunit(driver_t *driver, device_t parent);
194 int bus_generic_probe(device_t dev);
195 int bus_generic_probe_hack(device_t dev);
196 device_t bus_generic_add_child(device_t, device_t, int, const char *, int);
197 int bus_generic_read_ivar(device_t dev, device_t child, int which,
199 int bus_generic_release_resource(device_t bus, device_t child,
200 int type, int rid, struct resource *r);
201 int bus_generic_get_resource(device_t dev, device_t child, int type,
202 int rid, u_long *startp, u_long *countp);
203 int bus_generic_set_resource(device_t dev, device_t child, int type,
204 int rid, u_long start, u_long count);
205 void bus_generic_delete_resource(device_t dev, device_t child,
207 int bus_generic_resume(device_t dev);
208 int bus_generic_setup_intr(device_t dev, device_t child,
209 struct resource *irq, int flags,
210 driver_intr_t *intr, void *arg,
211 void **cookiep, lwkt_serialize_t serializer);
212 int bus_generic_shutdown(device_t dev);
213 int bus_generic_suspend(device_t dev);
214 int bus_generic_teardown_intr(device_t dev, device_t child,
215 struct resource *irq, void *cookie);
216 int bus_generic_write_ivar(device_t dev, device_t child, int which,
220 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
221 u_long, u_long, u_long, u_int);
222 void bus_generic_rl_delete_resource (device_t, device_t, int, int);
223 int bus_generic_rl_get_resource (device_t, device_t, int, int, u_long *,
225 int bus_generic_rl_set_resource (device_t, device_t, int, int, u_long,
227 int bus_generic_rl_release_resource (device_t, device_t, int, int,
231 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
234 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
235 u_long start, u_long end, u_long count,
237 int bus_activate_resource(device_t dev, int type, int rid,
239 int bus_deactivate_resource(device_t dev, int type, int rid,
241 int bus_disable_intr(device_t dev, void *cookie);
242 void bus_enable_intr(device_t dev, void *cookie);
243 int bus_release_resource(device_t dev, int type, int rid,
245 int bus_setup_intr(device_t dev, struct resource *r, int flags,
246 driver_intr_t handler, void *arg,
247 void **cookiep, lwkt_serialize_t serializer);
248 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
249 int bus_set_resource(device_t dev, int type, int rid,
250 u_long start, u_long count);
251 int bus_get_resource(device_t dev, int type, int rid,
252 u_long *startp, u_long *countp);
253 u_long bus_get_resource_start(device_t dev, int type, int rid);
254 u_long bus_get_resource_count(device_t dev, int type, int rid);
255 void bus_delete_resource(device_t dev, int type, int rid);
256 int bus_child_present(device_t child);
257 int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen);
258 int bus_child_location_str(device_t child, char *buf, size_t buflen);
260 static __inline struct resource *
261 bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags)
263 return (bus_alloc_resource(dev, type, rid, 0ul, ~0ul, 1, flags));
267 * Access functions for device.
269 device_t device_add_child(device_t dev, const char *name, int unit);
270 device_t device_add_child_ordered(device_t dev, int order,
271 const char *name, int unit);
272 void device_busy(device_t dev);
273 int device_delete_child(device_t dev, device_t child);
274 int device_detach(device_t dev);
275 void device_disable(device_t dev);
276 void device_enable(device_t dev);
277 device_t device_find_child(device_t dev, const char *classname,
279 const char *device_get_desc(device_t dev);
280 devclass_t device_get_devclass(device_t dev);
281 driver_t *device_get_driver(device_t dev);
282 u_int32_t device_get_flags(device_t dev);
283 device_t device_get_parent(device_t dev);
284 int device_get_children(device_t dev, device_t **listp, int *countp);
285 void *device_get_ivars(device_t dev);
286 void device_set_ivars(device_t dev, void *ivars);
287 const char *device_get_name(device_t dev);
288 const char *device_get_nameunit(device_t dev);
289 void *device_get_softc(device_t dev);
290 device_state_t device_get_state(device_t dev);
291 int device_get_unit(device_t dev);
292 int device_is_alive(device_t dev); /* did probe succeed? */
293 int device_is_attached(device_t dev); /* did attach succeed? */
294 int device_is_enabled(device_t dev);
295 int device_is_quiet(device_t dev);
296 int device_print_prettyname(device_t dev);
297 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
298 int device_probe_and_attach(device_t dev);
299 void device_quiet(device_t dev);
300 void device_set_desc(device_t dev, const char* desc);
301 void device_set_desc_copy(device_t dev, const char* desc);
302 int device_set_devclass(device_t dev, const char *classname);
303 int device_set_driver(device_t dev, driver_t *driver);
304 void device_set_flags(device_t dev, u_int32_t flags);
305 void device_set_softc(device_t dev, void *softc);
306 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
307 int device_shutdown(device_t dev);
308 void device_unbusy(device_t dev);
309 void device_verbose(device_t dev);
312 * Access functions for devclass.
314 int devclass_add_driver(devclass_t dc, kobj_class_t driver);
315 int devclass_delete_driver(devclass_t dc, kobj_class_t driver);
316 devclass_t devclass_create(const char *classname);
317 devclass_t devclass_find(const char *classname);
318 device_t devclass_find_unit(const char *classname, int unit);
319 kobj_class_t devclass_find_driver(devclass_t dc, const char *classname);
320 const char *devclass_get_name(devclass_t dc);
321 device_t devclass_get_device(devclass_t dc, int unit);
322 void *devclass_get_softc(devclass_t dc, int unit);
323 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
324 int devclass_get_maxunit(devclass_t dc);
325 void devclass_set_parent(devclass_t dc, devclass_t pdc);
326 devclass_t devclass_get_parent(devclass_t dc);
329 * Access functions for device resources.
332 int resource_int_value(const char *name, int unit, const char *resname,
334 int resource_long_value(const char *name, int unit, const char *resname,
336 int resource_string_value(const char *name, int unit, const char *resname,
338 int resource_disabled(const char *name, int unit);
339 int resource_query_string(int i, const char *resname, const char *value);
340 char *resource_query_name(int i);
341 int resource_query_unit(int i);
342 int resource_locate(int i, const char *resname);
343 int resource_set_int(const char *name, int unit, const char *resname,
345 int resource_set_long(const char *name, int unit, const char *resname,
347 int resource_set_string(const char *name, int unit, const char *resname,
349 int resource_count(void);
352 * Shorthand for constructing method tables.
354 #define DEVMETHOD KOBJMETHOD
357 * Some common device interfaces.
359 #include "device_if.h"
364 int driver_module_handler(struct module *, int, void *);
367 * Module support for automatically adding drivers to busses.
369 struct driver_module_data {
370 int (*dmd_chainevh)(struct module *, int, void *);
372 const char *dmd_busname;
373 kobj_class_t dmd_driver;
374 devclass_t *dmd_devclass;
377 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
379 static struct driver_module_data name##_##busname##_driver_mod = { \
382 (kobj_class_t) &driver, \
386 static moduledata_t name##_##busname##_mod = { \
387 #busname "/" #name, \
388 driver_module_handler, \
389 &name##_##busname##_driver_mod \
391 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
392 SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
396 #endif /* !_SYS_BUS_H_ */