Bring kernel threads back into top.
[dragonfly.git] / sys / sys / bus.h
CommitLineData
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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 *
07d2fd35 26 * $FreeBSD: src/sys/sys/bus.h,v 1.30.2.5 2004/03/17 17:54:25 njl Exp $
558a398b 27 * $DragonFly: src/sys/sys/bus.h,v 1.24 2007/01/04 21:47:03 corecode Exp $
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28 */
29
30#ifndef _SYS_BUS_H_
31#define _SYS_BUS_H_
32
7490f18b 33#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
984263bc 34
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35#ifndef _SYS_TYPES_H_
36#include <sys/types.h>
37#endif
38#ifndef _SYS_QUEUE_H_
984263bc 39#include <sys/queue.h>
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40#endif
41#ifndef _SYS_KOBJ_H_
80eff43d 42#include <sys/kobj.h>
1bd40720 43#endif
7490f18b 44#ifdef _KERNEL
e9cb6d99 45#include <sys/serialize.h>
7490f18b 46#endif
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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
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53
54/*
55 * Forward declarations
56 */
57typedef struct device *device_t;
e1bc6fbb 58typedef struct kobj_class driver_t;
984263bc 59typedef struct devclass *devclass_t;
80eff43d 60#define device_method_t kobj_method_t
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61
62typedef void driver_intr_t(void*);
63
64/*
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65 * Interrupt features mask. Note that DragonFly no longer implements
66 * INTR_TYPE_* flags.
984263bc 67 */
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68#define INTR_FAST 0x0080
69#define INTR_EXCL 0x0100
70#define INTR_MPSAFE 0x0200
8b3ec75a 71#define INTR_NOENTROPY 0x0400
477d3c1c 72#define INTR_NOPOLL 0x0800 /* interrupt cannot be polled (e.g. ata) */
bbe77fc3 73
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74#define INTR_NETSAFE INTR_MPSAFE
75
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76enum intr_trigger {
77 INTR_TRIGGER_CONFORM = 0,
78 INTR_TRIGGER_EDGE = 1,
79 INTR_TRIGGER_LEVEL = 2
80};
81
82enum intr_polarity {
83 INTR_POLARITY_CONFORM = 0,
84 INTR_POLARITY_HIGH = 1,
85 INTR_POLARITY_LOW = 2
984263bc 86};
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87
88typedef int (*devop_t)(void);
89
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90typedef enum device_state {
91 DS_NOTPRESENT, /* not probed or probe failed */
92 DS_ALIVE, /* probe succeeded */
93 DS_ATTACHED, /* attach method called */
94 DS_BUSY /* device is open */
95} device_state_t;
96
97/*
98 * Definitions for drivers which need to keep simple lists of resources
99 * for their child devices.
100 */
101struct resource;
102
103struct resource_list_entry {
104 SLIST_ENTRY(resource_list_entry) link;
105 int type; /* type argument to alloc_resource */
106 int rid; /* resource identifier */
107 struct resource *res; /* the real resource when allocated */
108 u_long start; /* start of resource range */
109 u_long end; /* end of resource range */
110 u_long count; /* count within range */
111};
112SLIST_HEAD(resource_list, resource_list_entry);
113
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114#endif /* _KERNEL || _KERNEL_STRUCTURES */
115#ifdef _KERNEL
116
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117/*
118 * Initialise a resource list.
119 */
120void resource_list_init(struct resource_list *rl);
121
122/*
123 * Reclaim memory used by a resource list.
124 */
125void resource_list_free(struct resource_list *rl);
126
127/*
128 * Add a resource entry or modify an existing entry if one exists with
129 * the same type and rid.
130 */
131void resource_list_add(struct resource_list *rl,
132 int type, int rid,
133 u_long start, u_long end, u_long count);
134
135/*
136 * Find a resource entry by type and rid.
137 */
138struct resource_list_entry*
139 resource_list_find(struct resource_list *rl,
140 int type, int rid);
141
142/*
143 * Delete a resource entry.
144 */
145void resource_list_delete(struct resource_list *rl,
146 int type, int rid);
147
148/*
149 * Implement BUS_ALLOC_RESOURCE by looking up a resource from the list
150 * and passing the allocation up to the parent of bus. This assumes
151 * that the first entry of device_get_ivars(child) is a struct
152 * resource_list. This also handles 'passthrough' allocations where a
153 * child is a remote descendant of bus by passing the allocation up to
154 * the parent of bus.
155 */
156struct resource *
157 resource_list_alloc(struct resource_list *rl,
158 device_t bus, device_t child,
159 int type, int *rid,
160 u_long start, u_long end,
161 u_long count, u_int flags);
162
163/*
164 * Implement BUS_RELEASE_RESOURCE.
165 */
166int resource_list_release(struct resource_list *rl,
167 device_t bus, device_t child,
168 int type, int rid, struct resource *res);
169
170/*
171 * Print all resources of a specified type, for use in bus_print_child.
172 * The name is printed if at least one resource of the given type is available.
173 * The format ist used to print resource start and end.
174 */
175int resource_list_print_type(struct resource_list *rl,
176 const char *name, int type,
177 const char *format);
178
179/*
180 * The root bus, to which all top-level busses are attached.
181 */
182extern device_t root_bus;
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183void root_bus_configure(void);
184
185/*
186 * Useful functions for implementing busses.
187 */
188
189int bus_generic_activate_resource(device_t dev, device_t child, int type,
190 int rid, struct resource *r);
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191struct resource *
192 bus_generic_alloc_resource(device_t bus, device_t child,
193 int type, int *rid,
194 u_long start, u_long end,
195 u_long count, u_int flags);
196struct resource_list *
197 bus_generic_get_resource_list (device_t, device_t);
198
199int bus_generic_config_intr(device_t, int, enum intr_trigger,
200 enum intr_polarity);
984263bc 201int bus_generic_attach(device_t dev);
22457186 202int bus_generic_child_present(device_t dev, device_t child);
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203int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
204 int rid, struct resource *r);
205int bus_generic_detach(device_t dev);
e9cb6d99 206int bus_generic_disable_intr(device_t dev, device_t child, void *cookie);
984263bc 207void bus_generic_driver_added(device_t dev, driver_t *driver);
67a2436e 208void bus_generic_enable_intr(device_t dev, device_t child, void *cookie);
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209int bus_print_child_header(device_t dev, device_t child);
210int bus_print_child_footer(device_t dev, device_t child);
211int bus_generic_print_child(device_t dev, device_t child);
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212int bus_generic_identify(driver_t *driver, device_t parent);
213int bus_generic_identify_sameunit(driver_t *driver, device_t parent);
984263bc 214int bus_generic_probe(device_t dev);
39b5d600 215int bus_generic_probe_hack(device_t dev);
2581072f 216device_t bus_generic_add_child(device_t, device_t, int, const char *, int);
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217int bus_generic_read_ivar(device_t dev, device_t child, int which,
218 uintptr_t *result);
219int bus_generic_release_resource(device_t bus, device_t child,
220 int type, int rid, struct resource *r);
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221int bus_generic_get_resource(device_t dev, device_t child, int type,
222 int rid, u_long *startp, u_long *countp);
223int bus_generic_set_resource(device_t dev, device_t child, int type,
224 int rid, u_long start, u_long count);
225void bus_generic_delete_resource(device_t dev, device_t child,
226 int type, int rid);
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227int bus_generic_resume(device_t dev);
228int bus_generic_setup_intr(device_t dev, device_t child,
229 struct resource *irq, int flags,
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230 driver_intr_t *intr, void *arg,
231 void **cookiep, lwkt_serialize_t serializer);
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232int bus_generic_shutdown(device_t dev);
233int bus_generic_suspend(device_t dev);
234int bus_generic_teardown_intr(device_t dev, device_t child,
235 struct resource *irq, void *cookie);
236int bus_generic_write_ivar(device_t dev, device_t child, int which,
237 uintptr_t value);
238
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239struct resource *
240 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
241 u_long, u_long, u_long, u_int);
242void bus_generic_rl_delete_resource (device_t, device_t, int, int);
243int bus_generic_rl_get_resource (device_t, device_t, int, int, u_long *,
244 u_long *);
245int bus_generic_rl_set_resource (device_t, device_t, int, int, u_long,
246 u_long);
247int bus_generic_rl_release_resource (device_t, device_t, int, int,
248 struct resource *);
249
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250/*
251 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
252 * a little simpler.
253 */
254struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
255 u_long start, u_long end, u_long count,
256 u_int flags);
257int bus_activate_resource(device_t dev, int type, int rid,
258 struct resource *r);
259int bus_deactivate_resource(device_t dev, int type, int rid,
260 struct resource *r);
e9cb6d99 261int bus_disable_intr(device_t dev, void *cookie);
67a2436e 262void bus_enable_intr(device_t dev, void *cookie);
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263int bus_release_resource(device_t dev, int type, int rid,
264 struct resource *r);
265int bus_setup_intr(device_t dev, struct resource *r, int flags,
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266 driver_intr_t handler, void *arg,
267 void **cookiep, lwkt_serialize_t serializer);
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268int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
269int bus_set_resource(device_t dev, int type, int rid,
270 u_long start, u_long count);
271int bus_get_resource(device_t dev, int type, int rid,
272 u_long *startp, u_long *countp);
273u_long bus_get_resource_start(device_t dev, int type, int rid);
274u_long bus_get_resource_count(device_t dev, int type, int rid);
275void bus_delete_resource(device_t dev, int type, int rid);
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276int bus_child_present(device_t child);
277int bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen);
278int bus_child_location_str(device_t child, char *buf, size_t buflen);
984263bc 279
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280static __inline struct resource *
281bus_alloc_resource_any(device_t dev, int type, int *rid, u_int flags)
282{
283 return (bus_alloc_resource(dev, type, rid, 0ul, ~0ul, 1, flags));
284}
285
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286/*
287 * Access functions for device.
288 */
289device_t device_add_child(device_t dev, const char *name, int unit);
290device_t device_add_child_ordered(device_t dev, int order,
291 const char *name, int unit);
292void device_busy(device_t dev);
293int device_delete_child(device_t dev, device_t child);
294int device_detach(device_t dev);
295void device_disable(device_t dev);
296void device_enable(device_t dev);
297device_t device_find_child(device_t dev, const char *classname,
298 int unit);
299const char *device_get_desc(device_t dev);
300devclass_t device_get_devclass(device_t dev);
301driver_t *device_get_driver(device_t dev);
302u_int32_t device_get_flags(device_t dev);
303device_t device_get_parent(device_t dev);
304int device_get_children(device_t dev, device_t **listp, int *countp);
305void *device_get_ivars(device_t dev);
306void device_set_ivars(device_t dev, void *ivars);
307const char *device_get_name(device_t dev);
308const char *device_get_nameunit(device_t dev);
309void *device_get_softc(device_t dev);
310device_state_t device_get_state(device_t dev);
311int device_get_unit(device_t dev);
312int device_is_alive(device_t dev); /* did probe succeed? */
2140e77f 313int device_is_attached(device_t dev); /* did attach succeed? */
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314int device_is_enabled(device_t dev);
315int device_is_quiet(device_t dev);
316int device_print_prettyname(device_t dev);
317int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
318int device_probe_and_attach(device_t dev);
319void device_quiet(device_t dev);
320void device_set_desc(device_t dev, const char* desc);
321void device_set_desc_copy(device_t dev, const char* desc);
322int device_set_devclass(device_t dev, const char *classname);
323int device_set_driver(device_t dev, driver_t *driver);
324void device_set_flags(device_t dev, u_int32_t flags);
325void device_set_softc(device_t dev, void *softc);
326int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
327int device_shutdown(device_t dev);
328void device_unbusy(device_t dev);
329void device_verbose(device_t dev);
330
331/*
332 * Access functions for devclass.
333 */
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334int devclass_add_driver(devclass_t dc, kobj_class_t driver);
335int devclass_delete_driver(devclass_t dc, kobj_class_t driver);
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336devclass_t devclass_create(const char *classname);
337devclass_t devclass_find(const char *classname);
2581072f 338device_t devclass_find_unit(const char *classname, int unit);
91a0c258 339kobj_class_t devclass_find_driver(devclass_t dc, const char *classname);
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340const char *devclass_get_name(devclass_t dc);
341device_t devclass_get_device(devclass_t dc, int unit);
342void *devclass_get_softc(devclass_t dc, int unit);
343int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
344int devclass_get_maxunit(devclass_t dc);
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345void devclass_set_parent(devclass_t dc, devclass_t pdc);
346devclass_t devclass_get_parent(devclass_t dc);
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347
348/*
349 * Access functions for device resources.
350 */
351
352int resource_int_value(const char *name, int unit, const char *resname,
353 int *result);
354int resource_long_value(const char *name, int unit, const char *resname,
355 long *result);
356int resource_string_value(const char *name, int unit, const char *resname,
357 char **result);
e126caf1 358int resource_disabled(const char *name, int unit);
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359int resource_query_string(int i, const char *resname, const char *value);
360char *resource_query_name(int i);
361int resource_query_unit(int i);
362int resource_locate(int i, const char *resname);
363int resource_set_int(const char *name, int unit, const char *resname,
364 int value);
365int resource_set_long(const char *name, int unit, const char *resname,
366 long value);
367int resource_set_string(const char *name, int unit, const char *resname,
368 const char *value);
369int resource_count(void);
370
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371/**
372 * Some convenience defines for probe routines to return. These are just
373 * suggested values, and there's nothing magical about them.
374 * BUS_PROBE_SPECIFIC is for devices that cannot be reprobed, and that no
375 * possible other driver may exist (typically legacy drivers who don't fallow
376 * all the rules, or special needs drivers). BUS_PROBE_VENDOR is the
377 * suggested value that vendor supplied drivers use. This is for source or
378 * binary drivers that are not yet integrated into the FreeBSD tree. Its use
379 * in the base OS is prohibited. BUS_PROBE_DEFAULT is the normal return value
380 * for drivers to use. It is intended that nearly all of the drivers in the
381 * tree should return this value. BUS_PROBE_LOW_PRIORITY are for drivers that
382 * have special requirements like when there are two drivers that support
383 * overlapping series of hardware devices. In this case the one that supports
384 * the older part of the line would return this value, while the one that
385 * supports the newer ones would return BUS_PROBE_DEFAULT. BUS_PROBE_GENERIC
386 * is for drivers that wish to have a generic form and a specialized form,
387 * like is done with the pci bus and the acpi pci bus. BUS_PROBE_HOOVER is
388 * for those busses that implement a generic device place-holder for devices on
389 * the bus that have no more specific driver for them (aka ugen).
390 */
391#define BUS_PROBE_SPECIFIC 0 /* Only I can use this device */
392#if notyet
393#define BUS_PROBE_VENDOR (-10) /* Vendor supplied driver */
394#define BUS_PROBE_DEFAULT (-20) /* Base OS default driver */
395#define BUS_PROBE_LOW_PRIORITY (-40) /* Older, less desirable drivers */
396#define BUS_PROBE_GENERIC (-100) /* generic driver for dev */
397#define BUS_PROBE_HOOVER (-500) /* Generic dev for all devs on bus */
398#else
399#define BUS_PROBE_VENDOR 0
400#define BUS_PROBE_DEFAULT 0
401#define BUS_PROBE_LOW_PRIORITY 0
402#define BUS_PROBE_GENERIC 0
403#define BUS_PROBE_HOOVER 0
404#endif
405
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406/*
407 * Shorthand for constructing method tables.
408 */
80eff43d 409#define DEVMETHOD KOBJMETHOD
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410
411/*
412 * Some common device interfaces.
413 */
414#include "device_if.h"
415#include "bus_if.h"
416
417struct module;
418
419int driver_module_handler(struct module *, int, void *);
420
421/*
422 * Module support for automatically adding drivers to busses.
423 */
424struct driver_module_data {
425 int (*dmd_chainevh)(struct module *, int, void *);
426 void *dmd_chainarg;
427 const char *dmd_busname;
91a0c258 428 kobj_class_t dmd_driver;
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429 devclass_t *dmd_devclass;
430};
431
432#define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
433 \
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434static struct driver_module_data name##_##busname##_driver_mod = { \
435 evh, arg, \
436 #busname, \
91a0c258 437 (kobj_class_t) &driver, \
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438 &devclass \
439}; \
440 \
441static moduledata_t name##_##busname##_mod = { \
442 #busname "/" #name, \
443 driver_module_handler, \
444 &name##_##busname##_driver_mod \
445}; \
446DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
447 SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
448
449#endif /* _KERNEL */
450
451#endif /* !_SYS_BUS_H_ */