| 1 | /*- |
| 2 | * Copyright (c) 1997,1998 Doug Rabson |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 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. |
| 13 | * |
| 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 |
| 24 | * SUCH DAMAGE. |
| 25 | * |
| 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 1.4 2003/11/22 19:30:57 asmodai Exp $ |
| 28 | */ |
| 29 | |
| 30 | #ifndef _SYS_BUS_H_ |
| 31 | #define _SYS_BUS_H_ |
| 32 | |
| 33 | #ifdef _KERNEL |
| 34 | |
| 35 | #include <sys/queue.h> |
| 36 | #include <sys/kobj.h> |
| 37 | |
| 38 | /* |
| 39 | * Forward declarations |
| 40 | */ |
| 41 | typedef struct device *device_t; |
| 42 | typedef struct driver driver_t; |
| 43 | typedef struct devclass *devclass_t; |
| 44 | #define device_method_t kobj_method_t |
| 45 | |
| 46 | typedef void driver_intr_t(void*); |
| 47 | |
| 48 | /* |
| 49 | * We define this in terms of bits because some devices may belong |
| 50 | * to multiple classes (and therefore need to be included in |
| 51 | * multiple interrupt masks, which is what this really serves to |
| 52 | * indicate. Buses which do interrupt remapping will want to |
| 53 | * change their type to reflect what sort of devices are underneath. |
| 54 | */ |
| 55 | enum intr_type { |
| 56 | INTR_TYPE_TTY = 1, |
| 57 | INTR_TYPE_BIO = 2, |
| 58 | INTR_TYPE_NET = 4, |
| 59 | INTR_TYPE_CAM = 8, |
| 60 | INTR_TYPE_MISC = 16, |
| 61 | INTR_TYPE_FAST = 128 |
| 62 | }; |
| 63 | #define INTR_TYPE_AV INTR_TYPE_TTY /* for source compatibility with 5.x */ |
| 64 | |
| 65 | typedef int (*devop_t)(void); |
| 66 | |
| 67 | struct driver { |
| 68 | KOBJ_CLASS_FIELDS; |
| 69 | void *priv; /* driver private data */ |
| 70 | }; |
| 71 | |
| 72 | typedef enum device_state { |
| 73 | DS_NOTPRESENT, /* not probed or probe failed */ |
| 74 | DS_ALIVE, /* probe succeeded */ |
| 75 | DS_ATTACHED, /* attach method called */ |
| 76 | DS_BUSY /* device is open */ |
| 77 | } device_state_t; |
| 78 | |
| 79 | /* |
| 80 | * Definitions for drivers which need to keep simple lists of resources |
| 81 | * for their child devices. |
| 82 | */ |
| 83 | struct resource; |
| 84 | |
| 85 | struct resource_list_entry { |
| 86 | SLIST_ENTRY(resource_list_entry) link; |
| 87 | int type; /* type argument to alloc_resource */ |
| 88 | int rid; /* resource identifier */ |
| 89 | struct resource *res; /* the real resource when allocated */ |
| 90 | u_long start; /* start of resource range */ |
| 91 | u_long end; /* end of resource range */ |
| 92 | u_long count; /* count within range */ |
| 93 | }; |
| 94 | SLIST_HEAD(resource_list, resource_list_entry); |
| 95 | |
| 96 | /* |
| 97 | * Initialise a resource list. |
| 98 | */ |
| 99 | void resource_list_init(struct resource_list *rl); |
| 100 | |
| 101 | /* |
| 102 | * Reclaim memory used by a resource list. |
| 103 | */ |
| 104 | void resource_list_free(struct resource_list *rl); |
| 105 | |
| 106 | /* |
| 107 | * Add a resource entry or modify an existing entry if one exists with |
| 108 | * the same type and rid. |
| 109 | */ |
| 110 | void resource_list_add(struct resource_list *rl, |
| 111 | int type, int rid, |
| 112 | u_long start, u_long end, u_long count); |
| 113 | |
| 114 | /* |
| 115 | * Find a resource entry by type and rid. |
| 116 | */ |
| 117 | struct resource_list_entry* |
| 118 | resource_list_find(struct resource_list *rl, |
| 119 | int type, int rid); |
| 120 | |
| 121 | /* |
| 122 | * Delete a resource entry. |
| 123 | */ |
| 124 | void resource_list_delete(struct resource_list *rl, |
| 125 | int type, int rid); |
| 126 | |
| 127 | /* |
| 128 | * Implement BUS_ALLOC_RESOURCE by looking up a resource from the list |
| 129 | * and passing the allocation up to the parent of bus. This assumes |
| 130 | * that the first entry of device_get_ivars(child) is a struct |
| 131 | * resource_list. This also handles 'passthrough' allocations where a |
| 132 | * child is a remote descendant of bus by passing the allocation up to |
| 133 | * the parent of bus. |
| 134 | */ |
| 135 | struct resource * |
| 136 | resource_list_alloc(struct resource_list *rl, |
| 137 | device_t bus, device_t child, |
| 138 | int type, int *rid, |
| 139 | u_long start, u_long end, |
| 140 | u_long count, u_int flags); |
| 141 | |
| 142 | /* |
| 143 | * Implement BUS_RELEASE_RESOURCE. |
| 144 | */ |
| 145 | int resource_list_release(struct resource_list *rl, |
| 146 | device_t bus, device_t child, |
| 147 | int type, int rid, struct resource *res); |
| 148 | |
| 149 | /* |
| 150 | * Print all resources of a specified type, for use in bus_print_child. |
| 151 | * The name is printed if at least one resource of the given type is available. |
| 152 | * The format ist used to print resource start and end. |
| 153 | */ |
| 154 | int resource_list_print_type(struct resource_list *rl, |
| 155 | const char *name, int type, |
| 156 | const char *format); |
| 157 | |
| 158 | /* |
| 159 | * The root bus, to which all top-level busses are attached. |
| 160 | */ |
| 161 | extern device_t root_bus; |
| 162 | extern devclass_t root_devclass; |
| 163 | void root_bus_configure(void); |
| 164 | |
| 165 | /* |
| 166 | * Useful functions for implementing busses. |
| 167 | */ |
| 168 | |
| 169 | int bus_generic_activate_resource(device_t dev, device_t child, int type, |
| 170 | int rid, struct resource *r); |
| 171 | struct resource *bus_generic_alloc_resource(device_t bus, device_t child, |
| 172 | int type, int *rid, |
| 173 | u_long start, u_long end, |
| 174 | u_long count, u_int flags); |
| 175 | int bus_generic_attach(device_t dev); |
| 176 | int bus_generic_deactivate_resource(device_t dev, device_t child, int type, |
| 177 | int rid, struct resource *r); |
| 178 | int bus_generic_detach(device_t dev); |
| 179 | void bus_generic_driver_added(device_t dev, driver_t *driver); |
| 180 | int bus_print_child_header(device_t dev, device_t child); |
| 181 | int bus_print_child_footer(device_t dev, device_t child); |
| 182 | int bus_generic_print_child(device_t dev, device_t child); |
| 183 | int bus_generic_probe(device_t dev); |
| 184 | int bus_generic_read_ivar(device_t dev, device_t child, int which, |
| 185 | uintptr_t *result); |
| 186 | int bus_generic_release_resource(device_t bus, device_t child, |
| 187 | int type, int rid, struct resource *r); |
| 188 | int bus_generic_resume(device_t dev); |
| 189 | int bus_generic_setup_intr(device_t dev, device_t child, |
| 190 | struct resource *irq, int flags, |
| 191 | driver_intr_t *intr, void *arg, void **cookiep); |
| 192 | int bus_generic_shutdown(device_t dev); |
| 193 | int bus_generic_suspend(device_t dev); |
| 194 | int bus_generic_teardown_intr(device_t dev, device_t child, |
| 195 | struct resource *irq, void *cookie); |
| 196 | int bus_generic_write_ivar(device_t dev, device_t child, int which, |
| 197 | uintptr_t value); |
| 198 | |
| 199 | /* |
| 200 | * Wrapper functions for the BUS_*_RESOURCE methods to make client code |
| 201 | * a little simpler. |
| 202 | */ |
| 203 | struct resource *bus_alloc_resource(device_t dev, int type, int *rid, |
| 204 | u_long start, u_long end, u_long count, |
| 205 | u_int flags); |
| 206 | int bus_activate_resource(device_t dev, int type, int rid, |
| 207 | struct resource *r); |
| 208 | int bus_deactivate_resource(device_t dev, int type, int rid, |
| 209 | struct resource *r); |
| 210 | int bus_release_resource(device_t dev, int type, int rid, |
| 211 | struct resource *r); |
| 212 | int bus_setup_intr(device_t dev, struct resource *r, int flags, |
| 213 | driver_intr_t handler, void *arg, void **cookiep); |
| 214 | int bus_teardown_intr(device_t dev, struct resource *r, void *cookie); |
| 215 | int bus_set_resource(device_t dev, int type, int rid, |
| 216 | u_long start, u_long count); |
| 217 | int bus_get_resource(device_t dev, int type, int rid, |
| 218 | u_long *startp, u_long *countp); |
| 219 | u_long bus_get_resource_start(device_t dev, int type, int rid); |
| 220 | u_long bus_get_resource_count(device_t dev, int type, int rid); |
| 221 | void bus_delete_resource(device_t dev, int type, int rid); |
| 222 | |
| 223 | /* |
| 224 | * Access functions for device. |
| 225 | */ |
| 226 | device_t device_add_child(device_t dev, const char *name, int unit); |
| 227 | device_t device_add_child_ordered(device_t dev, int order, |
| 228 | const char *name, int unit); |
| 229 | void device_busy(device_t dev); |
| 230 | int device_delete_child(device_t dev, device_t child); |
| 231 | int device_detach(device_t dev); |
| 232 | void device_disable(device_t dev); |
| 233 | void device_enable(device_t dev); |
| 234 | device_t device_find_child(device_t dev, const char *classname, |
| 235 | int unit); |
| 236 | const char *device_get_desc(device_t dev); |
| 237 | devclass_t device_get_devclass(device_t dev); |
| 238 | driver_t *device_get_driver(device_t dev); |
| 239 | u_int32_t device_get_flags(device_t dev); |
| 240 | device_t device_get_parent(device_t dev); |
| 241 | int device_get_children(device_t dev, device_t **listp, int *countp); |
| 242 | void *device_get_ivars(device_t dev); |
| 243 | void device_set_ivars(device_t dev, void *ivars); |
| 244 | const char *device_get_name(device_t dev); |
| 245 | const char *device_get_nameunit(device_t dev); |
| 246 | void *device_get_softc(device_t dev); |
| 247 | device_state_t device_get_state(device_t dev); |
| 248 | int device_get_unit(device_t dev); |
| 249 | int device_is_alive(device_t dev); /* did probe succeed? */ |
| 250 | int device_is_enabled(device_t dev); |
| 251 | int device_is_quiet(device_t dev); |
| 252 | int device_print_prettyname(device_t dev); |
| 253 | int device_printf(device_t dev, const char *, ...) __printflike(2, 3); |
| 254 | int device_probe_and_attach(device_t dev); |
| 255 | void device_quiet(device_t dev); |
| 256 | void device_set_desc(device_t dev, const char* desc); |
| 257 | void device_set_desc_copy(device_t dev, const char* desc); |
| 258 | int device_set_devclass(device_t dev, const char *classname); |
| 259 | int device_set_driver(device_t dev, driver_t *driver); |
| 260 | void device_set_flags(device_t dev, u_int32_t flags); |
| 261 | void device_set_softc(device_t dev, void *softc); |
| 262 | int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */ |
| 263 | int device_shutdown(device_t dev); |
| 264 | void device_unbusy(device_t dev); |
| 265 | void device_verbose(device_t dev); |
| 266 | |
| 267 | /* |
| 268 | * Access functions for devclass. |
| 269 | */ |
| 270 | int devclass_add_driver(devclass_t dc, driver_t *driver); |
| 271 | int devclass_delete_driver(devclass_t dc, driver_t *driver); |
| 272 | devclass_t devclass_create(const char *classname); |
| 273 | devclass_t devclass_find(const char *classname); |
| 274 | driver_t *devclass_find_driver(devclass_t dc, const char *classname); |
| 275 | const char *devclass_get_name(devclass_t dc); |
| 276 | device_t devclass_get_device(devclass_t dc, int unit); |
| 277 | void *devclass_get_softc(devclass_t dc, int unit); |
| 278 | int devclass_get_devices(devclass_t dc, device_t **listp, int *countp); |
| 279 | int devclass_get_maxunit(devclass_t dc); |
| 280 | |
| 281 | /* |
| 282 | * Access functions for device resources. |
| 283 | */ |
| 284 | |
| 285 | int resource_int_value(const char *name, int unit, const char *resname, |
| 286 | int *result); |
| 287 | int resource_long_value(const char *name, int unit, const char *resname, |
| 288 | long *result); |
| 289 | int resource_string_value(const char *name, int unit, const char *resname, |
| 290 | char **result); |
| 291 | int resource_query_string(int i, const char *resname, const char *value); |
| 292 | char *resource_query_name(int i); |
| 293 | int resource_query_unit(int i); |
| 294 | int resource_locate(int i, const char *resname); |
| 295 | int resource_set_int(const char *name, int unit, const char *resname, |
| 296 | int value); |
| 297 | int resource_set_long(const char *name, int unit, const char *resname, |
| 298 | long value); |
| 299 | int resource_set_string(const char *name, int unit, const char *resname, |
| 300 | const char *value); |
| 301 | int resource_count(void); |
| 302 | |
| 303 | /* |
| 304 | * Shorthand for constructing method tables. |
| 305 | */ |
| 306 | #define DEVMETHOD KOBJMETHOD |
| 307 | |
| 308 | /* |
| 309 | * Some common device interfaces. |
| 310 | */ |
| 311 | #include "device_if.h" |
| 312 | #include "bus_if.h" |
| 313 | |
| 314 | struct module; |
| 315 | |
| 316 | int driver_module_handler(struct module *, int, void *); |
| 317 | |
| 318 | /* |
| 319 | * Module support for automatically adding drivers to busses. |
| 320 | */ |
| 321 | struct driver_module_data { |
| 322 | int (*dmd_chainevh)(struct module *, int, void *); |
| 323 | void *dmd_chainarg; |
| 324 | const char *dmd_busname; |
| 325 | driver_t **dmd_drivers; |
| 326 | int dmd_ndrivers; |
| 327 | devclass_t *dmd_devclass; |
| 328 | }; |
| 329 | |
| 330 | #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \ |
| 331 | \ |
| 332 | static driver_t *name##_##busname##_driver_list[] = { &driver }; \ |
| 333 | static struct driver_module_data name##_##busname##_driver_mod = { \ |
| 334 | evh, arg, \ |
| 335 | #busname, \ |
| 336 | name##_##busname##_driver_list, \ |
| 337 | (sizeof name##_##busname##_driver_list) / \ |
| 338 | (sizeof name##_##busname##_driver_list[0]), \ |
| 339 | &devclass \ |
| 340 | }; \ |
| 341 | \ |
| 342 | static moduledata_t name##_##busname##_mod = { \ |
| 343 | #busname "/" #name, \ |
| 344 | driver_module_handler, \ |
| 345 | &name##_##busname##_driver_mod \ |
| 346 | }; \ |
| 347 | DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \ |
| 348 | SI_SUB_DRIVERS, SI_ORDER_MIDDLE) |
| 349 | |
| 350 | #define MULTI_DRIVER_MODULE(name, busname, drivers, devclass, evh, arg) \ |
| 351 | \ |
| 352 | static driver_t name##_##busname##_driver_list[] = drivers; \ |
| 353 | static struct driver_module_data name##_##busname##_driver_mod = { \ |
| 354 | evh, arg, \ |
| 355 | #busname, \ |
| 356 | name##_##busname##_driver_list, \ |
| 357 | (sizeof name##_##busname##_driver_list) / \ |
| 358 | (sizeof name##_##busname##_driver_list[0]), \ |
| 359 | &devclass \ |
| 360 | }; \ |
| 361 | \ |
| 362 | static moduledata_t name##_##busname##_mod = { \ |
| 363 | #busname "/" #name, \ |
| 364 | driver_module_handler, \ |
| 365 | &name##_##busname##_driver_mod \ |
| 366 | }; \ |
| 367 | DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \ |
| 368 | SI_SUB_DRIVERS, SI_ORDER_MIDDLE) |
| 369 | |
| 370 | #endif /* _KERNEL */ |
| 371 | |
| 372 | #endif /* !_SYS_BUS_H_ */ |