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
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9 * notice, this list of conditions and the following disclaimer.
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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/sys/bus.h,v 1.30.2.4 2002/10/10 15:13:33 jhb Exp $
27 * $DragonFly: src/sys/sys/bus.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
35 #include <sys/queue.h>
38 * Forward declarations
40 typedef struct device *device_t;
41 typedef struct driver driver_t;
42 typedef struct device_method device_method_t;
43 typedef struct devclass *devclass_t;
44 typedef struct device_ops *device_ops_t;
45 typedef struct device_op_desc *device_op_desc_t;
47 typedef void driver_intr_t(void*);
50 * We define this in terms of bits because some devices may belong
51 * to multiple classes (and therefore need to be included in
52 * multiple interrupt masks, which is what this really serves to
53 * indicate. Buses which do interrupt remapping will want to
54 * change their type to reflect what sort of devices are underneath.
64 #define INTR_TYPE_AV INTR_TYPE_TTY /* for source compatability with 5.x */
66 typedef int (*devop_t)(void);
68 struct device_method {
69 device_op_desc_t desc;
74 const char *name; /* driver name */
75 device_method_t *methods; /* method table */
76 size_t softc; /* size of device softc struct */
77 void *priv; /* driver private data */
78 device_ops_t ops; /* compiled method table */
79 int refs; /* # devclasses containing driver */
82 typedef enum device_state {
83 DS_NOTPRESENT, /* not probed or probe failed */
84 DS_ALIVE, /* probe succeeded */
85 DS_ATTACHED, /* attach method called */
86 DS_BUSY /* device is open */
90 * Definitions for drivers which need to keep simple lists of resources
91 * for their child devices.
95 struct resource_list_entry {
96 SLIST_ENTRY(resource_list_entry) link;
97 int type; /* type argument to alloc_resource */
98 int rid; /* resource identifier */
99 struct resource *res; /* the real resource when allocated */
100 u_long start; /* start of resource range */
101 u_long end; /* end of resource range */
102 u_long count; /* count within range */
104 SLIST_HEAD(resource_list, resource_list_entry);
107 * Initialise a resource list.
109 void resource_list_init(struct resource_list *rl);
112 * Reclaim memory used by a resource list.
114 void resource_list_free(struct resource_list *rl);
117 * Add a resource entry or modify an existing entry if one exists with
118 * the same type and rid.
120 void resource_list_add(struct resource_list *rl,
122 u_long start, u_long end, u_long count);
125 * Find a resource entry by type and rid.
127 struct resource_list_entry*
128 resource_list_find(struct resource_list *rl,
132 * Delete a resource entry.
134 void resource_list_delete(struct resource_list *rl,
138 * Implement BUS_ALLOC_RESOURCE by looking up a resource from the list
139 * and passing the allocation up to the parent of bus. This assumes
140 * that the first entry of device_get_ivars(child) is a struct
141 * resource_list. This also handles 'passthrough' allocations where a
142 * child is a remote descendant of bus by passing the allocation up to
146 resource_list_alloc(struct resource_list *rl,
147 device_t bus, device_t child,
149 u_long start, u_long end,
150 u_long count, u_int flags);
153 * Implement BUS_RELEASE_RESOURCE.
155 int resource_list_release(struct resource_list *rl,
156 device_t bus, device_t child,
157 int type, int rid, struct resource *res);
160 * Print all resources of a specified type, for use in bus_print_child.
161 * The name is printed if at least one resource of the given type is available.
162 * The format ist used to print resource start and end.
164 int resource_list_print_type(struct resource_list *rl,
165 const char *name, int type,
169 * The root bus, to which all top-level busses are attached.
171 extern device_t root_bus;
172 extern devclass_t root_devclass;
173 void root_bus_configure(void);
176 * Useful functions for implementing busses.
179 int bus_generic_activate_resource(device_t dev, device_t child, int type,
180 int rid, struct resource *r);
181 struct resource *bus_generic_alloc_resource(device_t bus, device_t child,
183 u_long start, u_long end,
184 u_long count, u_int flags);
185 int bus_generic_attach(device_t dev);
186 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
187 int rid, struct resource *r);
188 int bus_generic_detach(device_t dev);
189 void bus_generic_driver_added(device_t dev, driver_t *driver);
190 int bus_print_child_header(device_t dev, device_t child);
191 int bus_print_child_footer(device_t dev, device_t child);
192 int bus_generic_print_child(device_t dev, device_t child);
193 int bus_generic_probe(device_t dev);
194 int bus_generic_read_ivar(device_t dev, device_t child, int which,
196 int bus_generic_release_resource(device_t bus, device_t child,
197 int type, int rid, struct resource *r);
198 int bus_generic_resume(device_t dev);
199 int bus_generic_setup_intr(device_t dev, device_t child,
200 struct resource *irq, int flags,
201 driver_intr_t *intr, void *arg, void **cookiep);
202 int bus_generic_shutdown(device_t dev);
203 int bus_generic_suspend(device_t dev);
204 int bus_generic_teardown_intr(device_t dev, device_t child,
205 struct resource *irq, void *cookie);
206 int bus_generic_write_ivar(device_t dev, device_t child, int which,
210 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
213 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
214 u_long start, u_long end, u_long count,
216 int bus_activate_resource(device_t dev, int type, int rid,
218 int bus_deactivate_resource(device_t dev, int type, int rid,
220 int bus_release_resource(device_t dev, int type, int rid,
222 int bus_setup_intr(device_t dev, struct resource *r, int flags,
223 driver_intr_t handler, void *arg, void **cookiep);
224 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
225 int bus_set_resource(device_t dev, int type, int rid,
226 u_long start, u_long count);
227 int bus_get_resource(device_t dev, int type, int rid,
228 u_long *startp, u_long *countp);
229 u_long bus_get_resource_start(device_t dev, int type, int rid);
230 u_long bus_get_resource_count(device_t dev, int type, int rid);
231 void bus_delete_resource(device_t dev, int type, int rid);
234 * Access functions for device.
236 device_t device_add_child(device_t dev, const char *name, int unit);
237 device_t device_add_child_ordered(device_t dev, int order,
238 const char *name, int unit);
239 void device_busy(device_t dev);
240 int device_delete_child(device_t dev, device_t child);
241 int device_detach(device_t dev);
242 void device_disable(device_t dev);
243 void device_enable(device_t dev);
244 device_t device_find_child(device_t dev, const char *classname,
246 const char *device_get_desc(device_t dev);
247 devclass_t device_get_devclass(device_t dev);
248 driver_t *device_get_driver(device_t dev);
249 u_int32_t device_get_flags(device_t dev);
250 device_t device_get_parent(device_t dev);
251 int device_get_children(device_t dev, device_t **listp, int *countp);
252 void *device_get_ivars(device_t dev);
253 void device_set_ivars(device_t dev, void *ivars);
254 const char *device_get_name(device_t dev);
255 const char *device_get_nameunit(device_t dev);
256 void *device_get_softc(device_t dev);
257 device_state_t device_get_state(device_t dev);
258 int device_get_unit(device_t dev);
259 int device_is_alive(device_t dev); /* did probe succeed? */
260 int device_is_enabled(device_t dev);
261 int device_is_quiet(device_t dev);
262 int device_print_prettyname(device_t dev);
263 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
264 int device_probe_and_attach(device_t dev);
265 void device_quiet(device_t dev);
266 void device_set_desc(device_t dev, const char* desc);
267 void device_set_desc_copy(device_t dev, const char* desc);
268 int device_set_devclass(device_t dev, const char *classname);
269 int device_set_driver(device_t dev, driver_t *driver);
270 void device_set_flags(device_t dev, u_int32_t flags);
271 void device_set_softc(device_t dev, void *softc);
272 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
273 int device_shutdown(device_t dev);
274 void device_unbusy(device_t dev);
275 void device_verbose(device_t dev);
278 * Access functions for devclass.
280 int devclass_add_driver(devclass_t dc, driver_t *driver);
281 int devclass_delete_driver(devclass_t dc, driver_t *driver);
282 devclass_t devclass_create(const char *classname);
283 devclass_t devclass_find(const char *classname);
284 driver_t *devclass_find_driver(devclass_t dc, const char *classname);
285 const char *devclass_get_name(devclass_t dc);
286 device_t devclass_get_device(devclass_t dc, int unit);
287 void *devclass_get_softc(devclass_t dc, int unit);
288 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
289 int devclass_get_maxunit(devclass_t dc);
292 * Access functions for device resources.
295 int resource_int_value(const char *name, int unit, const char *resname,
297 int resource_long_value(const char *name, int unit, const char *resname,
299 int resource_string_value(const char *name, int unit, const char *resname,
301 int resource_query_string(int i, const char *resname, const char *value);
302 char *resource_query_name(int i);
303 int resource_query_unit(int i);
304 int resource_locate(int i, const char *resname);
305 int resource_set_int(const char *name, int unit, const char *resname,
307 int resource_set_long(const char *name, int unit, const char *resname,
309 int resource_set_string(const char *name, int unit, const char *resname,
311 int resource_count(void);
314 * Shorthand for constructing method tables.
316 #define DEVMETHOD(NAME, FUNC) { &NAME##_desc, (devop_t) FUNC }
319 * Some common device interfaces.
321 #include "device_if.h"
326 int driver_module_handler(struct module *, int, void *);
329 * Module support for automatically adding drivers to busses.
331 struct driver_module_data {
332 int (*dmd_chainevh)(struct module *, int, void *);
334 const char *dmd_busname;
335 driver_t **dmd_drivers;
337 devclass_t *dmd_devclass;
340 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
342 static driver_t *name##_##busname##_driver_list[] = { &driver }; \
343 static struct driver_module_data name##_##busname##_driver_mod = { \
346 name##_##busname##_driver_list, \
347 (sizeof name##_##busname##_driver_list) / \
348 (sizeof name##_##busname##_driver_list[0]), \
352 static moduledata_t name##_##busname##_mod = { \
353 #busname "/" #name, \
354 driver_module_handler, \
355 &name##_##busname##_driver_mod \
357 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
358 SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
360 #define MULTI_DRIVER_MODULE(name, busname, drivers, devclass, evh, arg) \
362 static driver_t name##_##busname##_driver_list[] = drivers; \
363 static struct driver_module_data name##_##busname##_driver_mod = { \
366 name##_##busname##_driver_list, \
367 (sizeof name##_##busname##_driver_list) / \
368 (sizeof name##_##busname##_driver_list[0]), \
372 static moduledata_t name##_##busname##_mod = { \
373 #busname "/" #name, \
374 driver_module_handler, \
375 &name##_##busname##_driver_mod \
377 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
378 SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
382 #endif /* !_SYS_BUS_H_ */