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 1.30.2.5 2004/03/17 17:54:25 njl Exp $ 27 * $DragonFly: src/sys/sys/bus.h,v 1.26 2007/09/12 07:59:31 hasso Exp $ 28 */ 29 30 #ifndef _SYS_BUS_H_ 31 #define _SYS_BUS_H_ 32 33 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 34 35 #ifndef _SYS_TYPES_H_ 36 #include <sys/types.h> 37 #endif 38 #ifndef _SYS_QUEUE_H_ 39 #include <sys/queue.h> 40 #endif 41 #ifndef _SYS_KOBJ_H_ 42 #include <sys/kobj.h> 43 #endif 44 #ifdef _KERNEL 45 #include <sys/serialize.h> 46 #endif 47 #ifndef _SYS_BUS_DMA_H_ 48 #include <sys/bus_dma.h> 49 #endif 50 #ifndef _SYS_BUS_RESOURCE_H_ 51 #include <sys/bus_resource.h> 52 #endif 53 54 /* 55 * Forward declarations 56 */ 57 typedef struct device *device_t; 58 typedef struct kobj_class driver_t; 59 typedef struct devclass *devclass_t; 60 #define device_method_t kobj_method_t 61 62 typedef void driver_intr_t(void*); 63 64 /* 65 * Interrupt features mask. Note that DragonFly no longer implements 66 * INTR_TYPE_* flags. 67 */ 68 #define INTR_FAST 0x0080 69 #define INTR_EXCL 0x0100 70 #define INTR_MPSAFE 0x0200 71 #define INTR_NOENTROPY 0x0400 72 #define INTR_NOPOLL 0x0800 /* interrupt cannot be polled (e.g. ata) */ 73 74 #define INTR_NETSAFE INTR_MPSAFE 75 76 enum intr_trigger { 77 INTR_TRIGGER_CONFORM = 0, 78 INTR_TRIGGER_EDGE = 1, 79 INTR_TRIGGER_LEVEL = 2 80 }; 81 82 enum intr_polarity { 83 INTR_POLARITY_CONFORM = 0, 84 INTR_POLARITY_HIGH = 1, 85 INTR_POLARITY_LOW = 2 86 }; 87 88 typedef int (*devop_t)(void); 89 90 typedef enum device_state { 91 DS_NOTPRESENT, /* not probed or probe failed */ 92 DS_ALIVE, /* probe succeeded */ 93 DS_INPROGRESS, /* attach in progress */ 94 DS_ATTACHED, /* attach method called */ 95 DS_BUSY /* device is open */ 96 } device_state_t; 97 98 /* 99 * Definitions for drivers which need to keep simple lists of resources 100 * for their child devices. 101 */ 102 struct resource; 103 104 struct resource_list_entry { 105 SLIST_ENTRY(resource_list_entry) link; 106 int type; /* type argument to alloc_resource */ 107 int rid; /* resource identifier */ 108 struct resource *res; /* the real resource when allocated */ 109 u_long start; /* start of resource range */ 110 u_long end; /* end of resource range */ 111 u_long count; /* count within range */ 112 }; 113 SLIST_HEAD(resource_list, resource_list_entry); 114 115 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 116 #ifdef _KERNEL 117 118 /* 119 * Initialise a resource list. 120 */ 121 void resource_list_init(struct resource_list *rl); 122 123 /* 124 * Reclaim memory used by a resource list. 125 */ 126 void resource_list_free(struct resource_list *rl); 127 128 /* 129 * Add a resource entry or modify an existing entry if one exists with 130 * the same type and rid. 131 */ 132 void resource_list_add(struct resource_list *rl, 133 int type, int rid, 134 u_long start, u_long end, u_long count); 135 136 /* 137 * Find a resource entry by type and rid. 138 */ 139 struct resource_list_entry* 140 resource_list_find(struct resource_list *rl, 141 int type, int rid); 142 143 /* 144 * Delete a resource entry. 145 */ 146 void resource_list_delete(struct resource_list *rl, 147 int type, int rid); 148 149 /* 150 * Implement BUS_ALLOC_RESOURCE by looking up a resource from the list 151 * and passing the allocation up to the parent of bus. This assumes 152 * that the first entry of device_get_ivars(child) is a struct 153 * resource_list. This also handles 'passthrough' allocations where a 154 * child is a remote descendant of bus by passing the allocation up to 155 * the parent of bus. 156 */ 157 struct resource * 158 resource_list_alloc(struct resource_list *rl, 159 device_t bus, device_t child, 160 int type, int *rid, 161 u_long start, u_long end, 162 u_long count, u_int flags); 163 164 /* 165 * Implement BUS_RELEASE_RESOURCE. 166 */ 167 int resource_list_release(struct resource_list *rl, 168 device_t bus, device_t child, 169 int type, int rid, struct resource *res); 170 171 /* 172 * Print all resources of a specified type, for use in bus_print_child. 173 * The name is printed if at least one resource of the given type is available. 174 * The format ist used to print resource start and end. 175 */ 176 int resource_list_print_type(struct resource_list *rl, 177 const char *name, int type, 178 const char *format); 179 180 /* 181 * The root bus, to which all top-level busses are attached. 182 */ 183 extern device_t root_bus; 184 void root_bus_configure(void); 185 186 /* 187 * Useful functions for implementing busses. 188 */ 189 190 int bus_generic_activate_resource(device_t dev, device_t child, int type, 191 int rid, struct resource *r); 192 struct resource * 193 bus_generic_alloc_resource(device_t bus, device_t child, 194 int type, int *rid, 195 u_long start, u_long end, 196 u_long count, u_int flags); 197 struct resource_list * 198 bus_generic_get_resource_list (device_t, device_t); 199 200 int bus_generic_config_intr(device_t, int, enum intr_trigger, 201 enum intr_polarity); 202 int bus_generic_attach(device_t dev); 203 int bus_generic_child_present(device_t dev, device_t child); 204 int bus_generic_deactivate_resource(device_t dev, device_t child, int type, 205 int rid, struct resource *r); 206 int bus_generic_detach(device_t dev); 207 int bus_generic_disable_intr(device_t dev, device_t child, void *cookie); 208 void bus_generic_driver_added(device_t dev, driver_t *driver); 209 void bus_generic_enable_intr(device_t dev, device_t child, void *cookie); 210 int bus_print_child_header(device_t dev, device_t child); 211 int bus_print_child_footer(device_t dev, device_t child); 212 int bus_generic_print_child(device_t dev, device_t child); 213 int bus_generic_identify(driver_t *driver, device_t parent); 214 int bus_generic_identify_sameunit(driver_t *driver, device_t parent); 215 int bus_generic_probe(device_t dev); 216 int bus_generic_probe_hack(device_t dev); 217 device_t bus_generic_add_child(device_t, device_t, int, const char *, int); 218 int bus_generic_read_ivar(device_t dev, device_t child, int which, 219 uintptr_t *result); 220 int bus_generic_release_resource(device_t bus, device_t child, 221 int type, int rid, struct resource *r); 222 int bus_generic_get_resource(device_t dev, device_t child, int type, 223 int rid, u_long *startp, u_long *countp); 224 int bus_generic_set_resource(device_t dev, device_t child, int type, 225 int rid, u_long start, u_long count); 226 void bus_generic_delete_resource(device_t dev, device_t child, 227 int type, int rid); 228 int bus_generic_resume(device_t dev); 229 int bus_generic_setup_intr(device_t dev, device_t child, 230 struct resource *irq, int flags, 231 driver_intr_t *intr, void *arg, 232 void **cookiep, lwkt_serialize_t serializer); 233 int bus_generic_shutdown(device_t dev); 234 int bus_generic_suspend(device_t dev); 235 int bus_generic_teardown_intr(device_t dev, device_t child, 236 struct resource *irq, void *cookie); 237 int bus_generic_write_ivar(device_t dev, device_t child, int which, 238 uintptr_t value); 239 240 struct resource * 241 bus_generic_rl_alloc_resource (device_t, device_t, int, int *, 242 u_long, u_long, u_long, u_int); 243 void bus_generic_rl_delete_resource (device_t, device_t, int, int); 244 int bus_generic_rl_get_resource (device_t, device_t, int, int, u_long *, 245 u_long *); 246 int bus_generic_rl_set_resource (device_t, device_t, int, int, u_long, 247 u_long); 248 int bus_generic_rl_release_resource (device_t, device_t, int, int, 249 struct resource *); 250 251 /* 252 * Wrapper functions for the BUS_*_RESOURCE methods to make client code 253 * a little simpler. 254 */ 255 struct resource_spec { 256 int type; 257 int rid; 258 int flags; 259 }; 260 261 int bus_alloc_resources(device_t dev, struct resource_spec *rs, 262 struct resource **res); 263 void bus_release_resources(device_t dev, const struct resource_spec *rs, 264 struct resource **res); 265 266 struct resource *bus_alloc_resource(device_t dev, int type, int *rid, 267 u_long start, u_long end, u_long count, 268 u_int flags); 269 int bus_activate_resource(device_t dev, int type, int rid, 270 struct resource *r); 271 int bus_deactivate_resource(device_t dev, int type, int rid, 272 struct resource *r); 273 int bus_disable_intr(device_t dev, void *cookie); 274 void bus_enable_intr(device_t dev, void *cookie); 275 int bus_release_resource(device_t dev, int type, int rid, 276 struct resource *r); 277 int bus_setup_intr(device_t dev, struct resource *r, int flags, 278 driver_intr_t handler, void *arg, 279 void **cookiep, lwkt_serialize_t serializer); 280 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie); 281 int bus_set_resource(device_t dev, int type, int rid, 282 u_long start, u_long count); 283 int bus_get_resource(device_t dev, int type, int rid, 284 u_long *startp, u_long *countp); 285 u_long bus_get_resource_start(device_t dev, int type, int rid); 286 u_long bus_get_resource_count(device_t dev, int type, int rid); 287 void bus_delete_resource(device_t dev, int type, int rid); 288 int bus_child_present(device_t child); 289 int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen); 290 int bus_child_location_str(device_t child, char *buf, size_t buflen); 291 292 static __inline struct resource * 293 bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags) 294 { 295 return (bus_alloc_resource(dev, type, rid, 0ul, ~0ul, 1, flags)); 296 } 297 298 /* 299 * Access functions for device. 300 */ 301 device_t device_add_child(device_t dev, const char *name, int unit); 302 device_t device_add_child_ordered(device_t dev, int order, 303 const char *name, int unit); 304 void device_busy(device_t dev); 305 int device_delete_child(device_t dev, device_t child); 306 int device_detach(device_t dev); 307 void device_disable(device_t dev); 308 void device_enable(device_t dev); 309 device_t device_find_child(device_t dev, const char *classname, 310 int unit); 311 const char *device_get_desc(device_t dev); 312 devclass_t device_get_devclass(device_t dev); 313 driver_t *device_get_driver(device_t dev); 314 u_int32_t device_get_flags(device_t dev); 315 device_t device_get_parent(device_t dev); 316 int device_get_children(device_t dev, device_t **listp, int *countp); 317 void *device_get_ivars(device_t dev); 318 void device_set_ivars(device_t dev, void *ivars); 319 const char *device_get_name(device_t dev); 320 const char *device_get_nameunit(device_t dev); 321 void *device_get_softc(device_t dev); 322 device_state_t device_get_state(device_t dev); 323 int device_get_unit(device_t dev); 324 int device_is_alive(device_t dev); /* did probe succeed? */ 325 int device_is_attached(device_t dev); /* did attach succeed? */ 326 int device_is_enabled(device_t dev); 327 int device_is_quiet(device_t dev); 328 int device_print_prettyname(device_t dev); 329 int device_printf(device_t dev, const char *, ...) __printflike(2, 3); 330 int device_probe_and_attach(device_t dev); 331 void device_quiet(device_t dev); 332 void device_set_desc(device_t dev, const char* desc); 333 void device_set_desc_copy(device_t dev, const char* desc); 334 int device_set_devclass(device_t dev, const char *classname); 335 int device_set_driver(device_t dev, driver_t *driver); 336 void device_set_flags(device_t dev, u_int32_t flags); 337 void device_set_softc(device_t dev, void *softc); 338 void device_set_async_attach(device_t dev, int enable); 339 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */ 340 int device_shutdown(device_t dev); 341 void device_unbusy(device_t dev); 342 void device_verbose(device_t dev); 343 344 /* 345 * Access functions for devclass. 346 */ 347 int devclass_add_driver(devclass_t dc, kobj_class_t driver); 348 int devclass_delete_driver(devclass_t dc, kobj_class_t driver); 349 devclass_t devclass_create(const char *classname); 350 devclass_t devclass_find(const char *classname); 351 device_t devclass_find_unit(const char *classname, int unit); 352 kobj_class_t devclass_find_driver(devclass_t dc, const char *classname); 353 const char *devclass_get_name(devclass_t dc); 354 device_t devclass_get_device(devclass_t dc, int unit); 355 void *devclass_get_softc(devclass_t dc, int unit); 356 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp); 357 int devclass_get_maxunit(devclass_t dc); 358 void devclass_set_parent(devclass_t dc, devclass_t pdc); 359 devclass_t devclass_get_parent(devclass_t dc); 360 361 /* 362 * Access functions for device resources. 363 */ 364 365 int resource_int_value(const char *name, int unit, const char *resname, 366 int *result); 367 int resource_long_value(const char *name, int unit, const char *resname, 368 long *result); 369 int resource_string_value(const char *name, int unit, const char *resname, 370 char **result); 371 int resource_disabled(const char *name, int unit); 372 int resource_query_string(int i, const char *resname, const char *value); 373 char *resource_query_name(int i); 374 int resource_query_unit(int i); 375 int resource_locate(int i, const char *resname); 376 int resource_set_int(const char *name, int unit, const char *resname, 377 int value); 378 int resource_set_long(const char *name, int unit, const char *resname, 379 long value); 380 int resource_set_string(const char *name, int unit, const char *resname, 381 const char *value); 382 int resource_count(void); 383 384 /** 385 * Some convenience defines for probe routines to return. These are just 386 * suggested values, and there's nothing magical about them. 387 * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no 388 * possible other driver may exist (typically legacy drivers who don't fallow 389 * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the 390 * suggested value that vendor supplied drivers use. This is for source or 391 * binary drivers that are not yet integrated into the FreeBSD tree. Its use 392 * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value 393 * for drivers to use. It is intended that nearly all of the drivers in the 394 * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that 395 * have special requirements like when there are two drivers that support 396 * overlapping series of hardware devices. In this case the one that supports 397 * the older part of the line would return this value, while the one that 398 * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC 399 * is for drivers that wish to have a generic form and a specialized form, 400 * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is 401 * for those busses that implement a generic device place-holder for devices on 402 * the bus that have no more specific driver for them (aka ugen). 403 */ 404 #define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */ 405 #if notyet 406 #define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */ 407 #define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */ 408 #define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */ 409 #define BUS_PROBE_GENERIC (-100) /* generic driver for dev */ 410 #define BUS_PROBE_HOOVER (-500) /* Generic dev for all devs on bus */ 411 #else 412 #define BUS_PROBE_VENDOR 0 413 #define BUS_PROBE_DEFAULT 0 414 #define BUS_PROBE_LOW_PRIORITY 0 415 #define BUS_PROBE_GENERIC 0 416 #define BUS_PROBE_HOOVER 0 417 #endif 418 419 /* 420 * Shorthand for constructing method tables. 421 */ 422 #define DEVMETHOD KOBJMETHOD 423 424 /* 425 * Some common device interfaces. 426 */ 427 #include "device_if.h" 428 #include "bus_if.h" 429 430 struct module; 431 432 int driver_module_handler(struct module *, int, void *); 433 434 /* 435 * Module support for automatically adding drivers to busses. 436 */ 437 struct driver_module_data { 438 int (*dmd_chainevh)(struct module *, int, void *); 439 void *dmd_chainarg; 440 const char *dmd_busname; 441 kobj_class_t dmd_driver; 442 devclass_t *dmd_devclass; 443 }; 444 445 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \ 446 \ 447 static struct driver_module_data name##_##busname##_driver_mod = { \ 448 evh, arg, \ 449 #busname, \ 450 (kobj_class_t) &driver, \ 451 &devclass \ 452 }; \ 453 \ 454 static moduledata_t name##_##busname##_mod = { \ 455 #busname "/" #name, \ 456 driver_module_handler, \ 457 &name##_##busname##_driver_mod \ 458 }; \ 459 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \ 460 SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 461 462 #endif /* _KERNEL */ 463 464 #endif /* !_SYS_BUS_H_ */ 465