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freebsd-dev/sys/kern/subr_bus.c
Peter Wemm eb2d8c2e8a The newer module dependency code exposes an apparent bug in the 
bus/driver/kobj system.  I am not 100% sure that this is the correct fix,
but it is harmless and does seem to solve the problem.  At worst, it could
cause a tiny memory leak at unload time - this is better than a free(NULL)
and subsequent panic.  I'm waiting for comments from Doug about this.
This may yet be backed out and fixed differently.

The change itself is to increment the reference count on drivers in one
case where it appears to have been missed.  When everything is unloaded,
kobj_class_free() was being called twice in some cases, and panicing the
second time.
2000-04-29 13:24:35 +00:00

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/*-
* Copyright (c) 1997,1998 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_bus.h"
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#ifdef DEVICE_SYSCTLS
#include <sys/sysctl.h>
#endif
#include <sys/kobj.h>
#include <sys/bus_private.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/stdarg.h> /* for device_printf() */
MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
#ifdef BUS_DEBUG
#define PDEBUG(a) (printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n"))
#define DEVICENAME(d) ((d)? device_get_name(d): "no device")
#define DRIVERNAME(d) ((d)? d->name : "no driver")
#define DEVCLANAME(d) ((d)? d->name : "no devclass")
/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to
* prevent syslog from deleting initial spaces
*/
#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while(0)
static void print_device_short(device_t dev, int indent);
static void print_device(device_t dev, int indent);
void print_device_tree_short(device_t dev, int indent);
void print_device_tree(device_t dev, int indent);
static void print_driver_short(driver_t *driver, int indent);
static void print_driver(driver_t *driver, int indent);
static void print_driver_list(driver_list_t drivers, int indent);
static void print_devclass_short(devclass_t dc, int indent);
static void print_devclass(devclass_t dc, int indent);
void print_devclass_list_short(void);
void print_devclass_list(void);
#else
/* Make the compiler ignore the function calls */
#define PDEBUG(a) /* nop */
#define DEVICENAME(d) /* nop */
#define DRIVERNAME(d) /* nop */
#define DEVCLANAME(d) /* nop */
#define print_device_short(d,i) /* nop */
#define print_device(d,i) /* nop */
#define print_device_tree_short(d,i) /* nop */
#define print_device_tree(d,i) /* nop */
#define print_driver_short(d,i) /* nop */
#define print_driver(d,i) /* nop */
#define print_driver_list(d,i) /* nop */
#define print_devclass_short(d,i) /* nop */
#define print_devclass(d,i) /* nop */
#define print_devclass_list_short() /* nop */
#define print_devclass_list() /* nop */
#endif
#ifdef DEVICE_SYSCTLS
static void device_register_oids(device_t dev);
static void device_unregister_oids(device_t dev);
#endif
kobj_method_t null_methods[] = {
{ 0, 0 }
};
DEFINE_CLASS(null, null_methods, 0);
/*
* Devclass implementation
*/
static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
static devclass_t
devclass_find_internal(const char *classname, int create)
{
devclass_t dc;
PDEBUG(("looking for %s", classname));
if (!classname)
return NULL;
for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link))
if (!strcmp(dc->name, classname))
return dc;
PDEBUG(("%s not found%s", classname, (create? ", creating": "")));
if (create) {
dc = malloc(sizeof(struct devclass) + strlen(classname) + 1,
M_BUS, M_NOWAIT);
if (!dc)
return NULL;
bzero(dc, sizeof(struct devclass) + strlen(classname) + 1);
dc->name = (char*) (dc + 1);
strcpy(dc->name, classname);
dc->devices = NULL;
dc->maxunit = 0;
TAILQ_INIT(&dc->drivers);
TAILQ_INSERT_TAIL(&devclasses, dc, link);
}
return dc;
}
devclass_t
devclass_create(const char *classname)
{
return devclass_find_internal(classname, TRUE);
}
devclass_t
devclass_find(const char *classname)
{
return devclass_find_internal(classname, FALSE);
}
int
devclass_add_driver(devclass_t dc, driver_t *driver)
{
driverlink_t dl;
int i;
PDEBUG(("%s", DRIVERNAME(driver)));
dl = malloc(sizeof *dl, M_BUS, M_NOWAIT);
if (!dl)
return ENOMEM;
bzero(dl, sizeof *dl);
/*
* Compile the driver's methods.
*/
kobj_class_compile((kobj_class_t) driver);
/*
* Make sure the devclass which the driver is implementing exists.
*/
devclass_find_internal(driver->name, TRUE);
dl->driver = driver;
TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
driver->refs++;
/*
* Call BUS_DRIVER_ADDED for any existing busses in this class.
*/
for (i = 0; i < dc->maxunit; i++)
if (dc->devices[i])
BUS_DRIVER_ADDED(dc->devices[i], driver);
return 0;
}
int
devclass_delete_driver(devclass_t busclass, driver_t *driver)
{
devclass_t dc = devclass_find(driver->name);
driverlink_t dl;
device_t dev;
int i;
int error;
PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
if (!dc)
return 0;
/*
* Find the link structure in the bus' list of drivers.
*/
for (dl = TAILQ_FIRST(&busclass->drivers); dl;
dl = TAILQ_NEXT(dl, link)) {
if (dl->driver == driver)
break;
}
if (!dl) {
PDEBUG(("%s not found in %s list", driver->name, busclass->name));
return ENOENT;
}
/*
* Disassociate from any devices. We iterate through all the
* devices in the devclass of the driver and detach any which are
* using the driver and which have a parent in the devclass which
* we are deleting from.
*
* Note that since a driver can be in multiple devclasses, we
* should not detach devices which are not children of devices in
* the affected devclass.
*/
for (i = 0; i < dc->maxunit; i++) {
if (dc->devices[i]) {
dev = dc->devices[i];
if (dev->driver == driver
&& dev->parent && dev->parent->devclass == busclass) {
if ((error = device_detach(dev)) != 0)
return error;
device_set_driver(dev, NULL);
}
}
}
TAILQ_REMOVE(&busclass->drivers, dl, link);
free(dl, M_BUS);
driver->refs--;
if (driver->refs == 0)
kobj_class_free((kobj_class_t) driver);
return 0;
}
static driverlink_t
devclass_find_driver_internal(devclass_t dc, const char *classname)
{
driverlink_t dl;
PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) {
if (!strcmp(dl->driver->name, classname))
return dl;
}
PDEBUG(("not found"));
return NULL;
}
driver_t *
devclass_find_driver(devclass_t dc, const char *classname)
{
driverlink_t dl;
dl = devclass_find_driver_internal(dc, classname);
if (dl)
return dl->driver;
else
return NULL;
}
const char *
devclass_get_name(devclass_t dc)
{
return dc->name;
}
device_t
devclass_get_device(devclass_t dc, int unit)
{
if (dc == NULL || unit < 0 || unit >= dc->maxunit)
return NULL;
return dc->devices[unit];
}
void *
devclass_get_softc(devclass_t dc, int unit)
{
device_t dev;
dev = devclass_get_device(dc, unit);
if (!dev)
return (NULL);
return (device_get_softc(dev));
}
int
devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
{
int i;
int count;
device_t *list;
count = 0;
for (i = 0; i < dc->maxunit; i++)
if (dc->devices[i])
count++;
list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT);
if (!list)
return ENOMEM;
bzero(list, count * sizeof(device_t));
count = 0;
for (i = 0; i < dc->maxunit; i++)
if (dc->devices[i]) {
list[count] = dc->devices[i];
count++;
}
*devlistp = list;
*devcountp = count;
return 0;
}
int
devclass_get_maxunit(devclass_t dc)
{
return dc->maxunit;
}
static int
devclass_alloc_unit(devclass_t dc, int *unitp)
{
int unit = *unitp;
PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
/*
* If we have been given a wired unit number, check for existing
* device.
*/
if (unit != -1) {
if (unit >= 0 && unit < dc->maxunit && dc->devices[unit] != NULL) {
if (bootverbose)
printf("%s-: %s%d exists, using next available unit number\n",
dc->name, dc->name, unit);
unit = -1;
}
}
/*
* We ended up with an unwired device, so let's find the next available
* slot for it.
*/
if (unit == -1) {
unit = 0;
while (unit < dc->maxunit && dc->devices[unit] != NULL)
unit++;
}
/*
* We've selected a unit beyond the length of the table, so let's extend
* the table to make room for all units up to and including this one.
*/
if (unit >= dc->maxunit) {
device_t *newlist;
int newsize;
newsize = (dc->maxunit ? 2 * dc->maxunit
: MINALLOCSIZE / sizeof(device_t));
newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT);
if (!newlist)
return ENOMEM;
bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
bzero(newlist + dc->maxunit,
sizeof(device_t) * (newsize - dc->maxunit));
if (dc->devices)
free(dc->devices, M_BUS);
dc->devices = newlist;
dc->maxunit = newsize;
}
PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
*unitp = unit;
return 0;
}
static int
devclass_add_device(devclass_t dc, device_t dev)
{
int buflen, error;
PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
buflen = strlen(dc->name) + 5;
dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT);
if (!dev->nameunit)
return ENOMEM;
bzero(dev->nameunit, buflen);
if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
free(dev->nameunit, M_BUS);
dev->nameunit = NULL;
return error;
}
dc->devices[dev->unit] = dev;
dev->devclass = dc;
snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
#ifdef DEVICE_SYSCTLS
device_register_oids(dev);
#endif
return 0;
}
static int
devclass_delete_device(devclass_t dc, device_t dev)
{
if (!dc || !dev)
return 0;
PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
if (dev->devclass != dc
|| dc->devices[dev->unit] != dev)
panic("devclass_delete_device: inconsistent device class");
dc->devices[dev->unit] = NULL;
if (dev->flags & DF_WILDCARD)
dev->unit = -1;
dev->devclass = NULL;
free(dev->nameunit, M_BUS);
dev->nameunit = NULL;
#ifdef DEVICE_SYSCTLS
device_unregister_oids(dev);
#endif
return 0;
}
static device_t
make_device(device_t parent, const char *name, int unit)
{
device_t dev;
devclass_t dc;
PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
if (name) {
dc = devclass_find_internal(name, TRUE);
if (!dc) {
printf("make_device: can't find device class %s\n", name);
return NULL;
}
} else
dc = NULL;
dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT);
if (!dev)
return 0;
bzero(dev, sizeof(struct device));
dev->parent = parent;
TAILQ_INIT(&dev->children);
kobj_init((kobj_t) dev, &null_class);
dev->driver = NULL;
dev->devclass = NULL;
dev->unit = unit;
dev->nameunit = NULL;
dev->desc = NULL;
dev->busy = 0;
dev->devflags = 0;
dev->flags = DF_ENABLED;
dev->order = 0;
if (unit == -1)
dev->flags |= DF_WILDCARD;
if (name) {
dev->flags |= DF_FIXEDCLASS;
devclass_add_device(dc, dev);
}
dev->ivars = NULL;
dev->softc = NULL;
dev->state = DS_NOTPRESENT;
kobj_init((kobj_t) dev, &null_class);
return dev;
}
static int
device_print_child(device_t dev, device_t child)
{
int retval = 0;
if (device_is_alive(child)) {
retval += BUS_PRINT_CHILD(dev, child);
} else
retval += device_printf(child, " not found\n");
return (retval);
}
device_t
device_add_child(device_t dev, const char *name, int unit)
{
return device_add_child_ordered(dev, 0, name, unit);
}
device_t
device_add_child_ordered(device_t dev, int order, const char *name, int unit)
{
device_t child;
device_t place;
PDEBUG(("%s at %s with order %d as unit %d",
name, DEVICENAME(dev), order, unit));
child = make_device(dev, name, unit);
if (child == NULL)
return child;
child->order = order;
TAILQ_FOREACH(place, &dev->children, link)
if (place->order > order)
break;
if (place) {
/*
* The device 'place' is the first device whose order is
* greater than the new child.
*/
TAILQ_INSERT_BEFORE(place, child, link);
} else {
/*
* The new child's order is greater or equal to the order of
* any existing device. Add the child to the tail of the list.
*/
TAILQ_INSERT_TAIL(&dev->children, child, link);
}
return child;
}
int
device_delete_child(device_t dev, device_t child)
{
int error;
device_t grandchild;
PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
/* remove children first */
while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
error = device_delete_child(child, grandchild);
if (error)
return error;
}
if ((error = device_detach(child)) != 0)
return error;
if (child->devclass)
devclass_delete_device(child->devclass, child);
TAILQ_REMOVE(&dev->children, child, link);
device_set_desc(child, NULL);
free(child, M_BUS);
return 0;
}
/*
* Find only devices attached to this bus.
*/
device_t
device_find_child(device_t dev, const char *classname, int unit)
{
devclass_t dc;
device_t child;
dc = devclass_find(classname);
if (!dc)
return NULL;
child = devclass_get_device(dc, unit);
if (child && child->parent == dev)
return child;
return NULL;
}
static driverlink_t
first_matching_driver(devclass_t dc, device_t dev)
{
if (dev->devclass)
return devclass_find_driver_internal(dc, dev->devclass->name);
else
return TAILQ_FIRST(&dc->drivers);
}
static driverlink_t
next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
{
if (dev->devclass) {
driverlink_t dl;
for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
if (!strcmp(dev->devclass->name, dl->driver->name))
return dl;
return NULL;
} else
return TAILQ_NEXT(last, link);
}
static int
device_probe_child(device_t dev, device_t child)
{
devclass_t dc;
driverlink_t best = 0;
driverlink_t dl;
int result, pri = 0;
int hasclass = (child->devclass != 0);
dc = dev->devclass;
if (!dc)
panic("device_probe_child: parent device has no devclass");
if (child->state == DS_ALIVE)
return 0;
for (dl = first_matching_driver(dc, child);
dl;
dl = next_matching_driver(dc, child, dl)) {
PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
device_set_driver(child, dl->driver);
if (!hasclass)
device_set_devclass(child, dl->driver->name);
result = DEVICE_PROBE(child);
if (!hasclass)
device_set_devclass(child, 0);
/*
* If the driver returns SUCCESS, there can be no higher match
* for this device.
*/
if (result == 0) {
best = dl;
pri = 0;
break;
}
/*
* The driver returned an error so it certainly doesn't match.
*/
if (result > 0) {
device_set_driver(child, 0);
continue;
}
/*
* A priority lower than SUCCESS, remember the best matching
* driver. Initialise the value of pri for the first match.
*/
if (best == 0 || result > pri) {
best = dl;
pri = result;
continue;
}
}
/*
* If we found a driver, change state and initialise the devclass.
*/
if (best) {
if (!child->devclass)
device_set_devclass(child, best->driver->name);
device_set_driver(child, best->driver);
if (pri < 0) {
/*
* A bit bogus. Call the probe method again to make sure
* that we have the right description.
*/
DEVICE_PROBE(child);
}
child->state = DS_ALIVE;
return 0;
}
return ENXIO;
}
device_t
device_get_parent(device_t dev)
{
return dev->parent;
}
int
device_get_children(device_t dev, device_t **devlistp, int *devcountp)
{
int count;
device_t child;
device_t *list;
count = 0;
for (child = TAILQ_FIRST(&dev->children); child;
child = TAILQ_NEXT(child, link))
count++;
list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT);
if (!list)
return ENOMEM;
bzero(list, count * sizeof(device_t));
count = 0;
for (child = TAILQ_FIRST(&dev->children); child;
child = TAILQ_NEXT(child, link)) {
list[count] = child;
count++;
}
*devlistp = list;
*devcountp = count;
return 0;
}
driver_t *
device_get_driver(device_t dev)
{
return dev->driver;
}
devclass_t
device_get_devclass(device_t dev)
{
return dev->devclass;
}
const char *
device_get_name(device_t dev)
{
if (dev->devclass)
return devclass_get_name(dev->devclass);
return NULL;
}
const char *
device_get_nameunit(device_t dev)
{
return dev->nameunit;
}
int
device_get_unit(device_t dev)
{
return dev->unit;
}
const char *
device_get_desc(device_t dev)
{
return dev->desc;
}
u_int32_t
device_get_flags(device_t dev)
{
return dev->devflags;
}
int
device_print_prettyname(device_t dev)
{
const char *name = device_get_name(dev);
if (name == 0)
return printf("unknown: ");
else
return printf("%s%d: ", name, device_get_unit(dev));
}
int
device_printf(device_t dev, const char * fmt, ...)
{
va_list ap;
int retval;
retval = device_print_prettyname(dev);
va_start(ap, fmt);
retval += vprintf(fmt, ap);
va_end(ap);
return retval;
}
static void
device_set_desc_internal(device_t dev, const char* desc, int copy)
{
if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
free(dev->desc, M_BUS);
dev->flags &= ~DF_DESCMALLOCED;
dev->desc = NULL;
}
if (copy && desc) {
dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT);
if (dev->desc) {
strcpy(dev->desc, desc);
dev->flags |= DF_DESCMALLOCED;
}
} else
/* Avoid a -Wcast-qual warning */
dev->desc = (char *)(uintptr_t) desc;
#ifdef DEVICE_SYSCTLS
{
struct sysctl_oid *oid = &dev->oid[1];
oid->oid_arg1 = dev->desc ? dev->desc : "";
oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
}
#endif
}
void
device_set_desc(device_t dev, const char* desc)
{
device_set_desc_internal(dev, desc, FALSE);
}
void
device_set_desc_copy(device_t dev, const char* desc)
{
device_set_desc_internal(dev, desc, TRUE);
}
void
device_set_flags(device_t dev, u_int32_t flags)
{
dev->devflags = flags;
}
void *
device_get_softc(device_t dev)
{
return dev->softc;
}
void *
device_get_ivars(device_t dev)
{
return dev->ivars;
}
void
device_set_ivars(device_t dev, void * ivars)
{
if (!dev)
return;
dev->ivars = ivars;
return;
}
device_state_t
device_get_state(device_t dev)
{
return dev->state;
}
void
device_enable(device_t dev)
{
dev->flags |= DF_ENABLED;
}
void
device_disable(device_t dev)
{
dev->flags &= ~DF_ENABLED;
}
void
device_busy(device_t dev)
{
if (dev->state < DS_ATTACHED)
panic("device_busy: called for unattached device");
if (dev->busy == 0 && dev->parent)
device_busy(dev->parent);
dev->busy++;
dev->state = DS_BUSY;
}
void
device_unbusy(device_t dev)
{
if (dev->state != DS_BUSY)
panic("device_unbusy: called for non-busy device");
dev->busy--;
if (dev->busy == 0) {
if (dev->parent)
device_unbusy(dev->parent);
dev->state = DS_ATTACHED;
}
}
void
device_quiet(device_t dev)
{
dev->flags |= DF_QUIET;
}
void
device_verbose(device_t dev)
{
dev->flags &= ~DF_QUIET;
}
int
device_is_quiet(device_t dev)
{
return (dev->flags & DF_QUIET) != 0;
}
int
device_is_enabled(device_t dev)
{
return (dev->flags & DF_ENABLED) != 0;
}
int
device_is_alive(device_t dev)
{
return dev->state >= DS_ALIVE;
}
int
device_set_devclass(device_t dev, const char *classname)
{
devclass_t dc;
if (!classname) {
if (dev->devclass)
devclass_delete_device(dev->devclass, dev);
return 0;
}
if (dev->devclass) {
printf("device_set_devclass: device class already set\n");
return EINVAL;
}
dc = devclass_find_internal(classname, TRUE);
if (!dc)
return ENOMEM;
return devclass_add_device(dc, dev);
}
int
device_set_driver(device_t dev, driver_t *driver)
{
if (dev->state >= DS_ATTACHED)
return EBUSY;
if (dev->driver == driver)
return 0;
if (dev->softc) {
free(dev->softc, M_BUS);
dev->softc = NULL;
}
kobj_delete((kobj_t) dev, 0);
dev->driver = driver;
if (driver) {
kobj_init((kobj_t) dev, (kobj_class_t) driver);
dev->softc = malloc(driver->size, M_BUS, M_NOWAIT);
if (!dev->softc) {
kobj_init((kobj_t) dev, &null_class);
dev->driver = NULL;
return ENOMEM;
}
bzero(dev->softc, driver->size);
driver->refs++;
} else
kobj_init((kobj_t) dev, &null_class);
return 0;
}
int
device_probe_and_attach(device_t dev)
{
device_t bus = dev->parent;
int error = 0;
if (dev->state >= DS_ALIVE)
return 0;
if (dev->flags & DF_ENABLED) {
error = device_probe_child(bus, dev);
if (!error) {
if (!device_is_quiet(dev))
device_print_child(bus, dev);
error = DEVICE_ATTACH(dev);
if (!error)
dev->state = DS_ATTACHED;
else {
printf("device_probe_and_attach: %s%d attach returned %d\n",
dev->driver->name, dev->unit, error);
device_set_driver(dev, NULL);
dev->state = DS_NOTPRESENT;
}
} else {
if (!(dev->flags & DF_DONENOMATCH)) {
BUS_PROBE_NOMATCH(bus, dev);
dev->flags |= DF_DONENOMATCH;
}
}
} else {
if (bootverbose) {
device_print_prettyname(dev);
printf("not probed (disabled)\n");
}
}
return error;
}
int
device_detach(device_t dev)
{
int error;
PDEBUG(("%s", DEVICENAME(dev)));
if (dev->state == DS_BUSY)
return EBUSY;
if (dev->state != DS_ATTACHED)
return 0;
if ((error = DEVICE_DETACH(dev)) != 0)
return error;
device_printf(dev, "detached\n");
if (dev->parent)
BUS_CHILD_DETACHED(dev->parent, dev);
if (!(dev->flags & DF_FIXEDCLASS))
devclass_delete_device(dev->devclass, dev);
dev->state = DS_NOTPRESENT;
device_set_driver(dev, NULL);
return 0;
}
int
device_shutdown(device_t dev)
{
if (dev->state < DS_ATTACHED)
return 0;
return DEVICE_SHUTDOWN(dev);
}
int
device_set_unit(device_t dev, int unit)
{
devclass_t dc;
int err;
dc = device_get_devclass(dev);
if (unit < dc->maxunit && dc->devices[unit])
return EBUSY;
err = devclass_delete_device(dc, dev);
if (err)
return err;
dev->unit = unit;
err = devclass_add_device(dc, dev);
if (err)
return err;
return 0;
}
#ifdef DEVICE_SYSCTLS
/*
* Sysctl nodes for devices.
*/
SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices");
static int
sysctl_handle_children SYSCTL_HANDLER_ARGS
{
device_t dev = arg1;
device_t child;
int first = 1, error = 0;
for (child = TAILQ_FIRST(&dev->children); child;
child = TAILQ_NEXT(child, link)) {
if (child->nameunit) {
if (!first) {
error = SYSCTL_OUT(req, ",", 1);
if (error) return error;
} else {
first = 0;
}
error = SYSCTL_OUT(req, child->nameunit, strlen(child->nameunit));
if (error) return error;
}
}
error = SYSCTL_OUT(req, "", 1);
return error;
}
static int
sysctl_handle_state SYSCTL_HANDLER_ARGS
{
device_t dev = arg1;
switch (dev->state) {
case DS_NOTPRESENT:
return SYSCTL_OUT(req, "notpresent", sizeof("notpresent"));
case DS_ALIVE:
return SYSCTL_OUT(req, "alive", sizeof("alive"));
case DS_ATTACHED:
return SYSCTL_OUT(req, "attached", sizeof("attached"));
case DS_BUSY:
return SYSCTL_OUT(req, "busy", sizeof("busy"));
}
return 0;
}
static void
device_register_oids(device_t dev)
{
struct sysctl_oid* oid;
oid = &dev->oid[0];
bzero(oid, sizeof(*oid));
oid->oid_parent = &sysctl__hw_devices_children;
oid->oid_number = OID_AUTO;
oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW;
oid->oid_arg1 = &dev->oidlist[0];
oid->oid_arg2 = 0;
oid->oid_name = dev->nameunit;
oid->oid_handler = 0;
oid->oid_fmt = "N";
SLIST_INIT(&dev->oidlist[0]);
sysctl_register_oid(oid);
oid = &dev->oid[1];
bzero(oid, sizeof(*oid));
oid->oid_parent = &dev->oidlist[0];
oid->oid_number = OID_AUTO;
oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD;
oid->oid_arg1 = dev->desc ? dev->desc : "";
oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
oid->oid_name = "desc";
oid->oid_handler = sysctl_handle_string;
oid->oid_fmt = "A";
sysctl_register_oid(oid);
oid = &dev->oid[2];
bzero(oid, sizeof(*oid));
oid->oid_parent = &dev->oidlist[0];
oid->oid_number = OID_AUTO;
oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
oid->oid_arg1 = dev;
oid->oid_arg2 = 0;
oid->oid_name = "children";
oid->oid_handler = sysctl_handle_children;
oid->oid_fmt = "A";
sysctl_register_oid(oid);
oid = &dev->oid[3];
bzero(oid, sizeof(*oid));
oid->oid_parent = &dev->oidlist[0];
oid->oid_number = OID_AUTO;
oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
oid->oid_arg1 = dev;
oid->oid_arg2 = 0;
oid->oid_name = "state";
oid->oid_handler = sysctl_handle_state;
oid->oid_fmt = "A";
sysctl_register_oid(oid);
}
static void
device_unregister_oids(device_t dev)
{
sysctl_unregister_oid(&dev->oid[0]);
sysctl_unregister_oid(&dev->oid[1]);
sysctl_unregister_oid(&dev->oid[2]);
}
#endif
/*======================================*/
/*
* Access functions for device resources.
*/
/* Supplied by config(8) in ioconf.c */
extern struct config_device config_devtab[];
extern int devtab_count;
/* Runtime version */
struct config_device *devtab = config_devtab;
static int
resource_new_name(const char *name, int unit)
{
struct config_device *new;
new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, M_NOWAIT);
if (new == NULL)
return -1;
if (devtab && devtab_count > 0)
bcopy(devtab, new, devtab_count * sizeof(*new));
bzero(&new[devtab_count], sizeof(*new));
new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_NOWAIT);
if (new[devtab_count].name == NULL) {
free(new, M_TEMP);
return -1;
}
strcpy(new[devtab_count].name, name);
new[devtab_count].unit = unit;
new[devtab_count].resource_count = 0;
new[devtab_count].resources = NULL;
devtab = new;
return devtab_count++;
}
static int
resource_new_resname(int j, const char *resname, resource_type type)
{
struct config_resource *new;
int i;
i = devtab[j].resource_count;
new = malloc((i + 1) * sizeof(*new), M_TEMP, M_NOWAIT);
if (new == NULL)
return -1;
if (devtab[j].resources && i > 0)
bcopy(devtab[j].resources, new, i * sizeof(*new));
bzero(&new[i], sizeof(*new));
new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_NOWAIT);
if (new[i].name == NULL) {
free(new, M_TEMP);
return -1;
}
strcpy(new[i].name, resname);
new[i].type = type;
if (devtab[j].resources)
free(devtab[j].resources, M_TEMP);
devtab[j].resources = new;
devtab[j].resource_count = i + 1;
return i;
}
static int
resource_match_string(int i, const char *resname, const char *value)
{
int j;
struct config_resource *res;
for (j = 0, res = devtab[i].resources;
j < devtab[i].resource_count; j++, res++)
if (!strcmp(res->name, resname)
&& res->type == RES_STRING
&& !strcmp(res->u.stringval, value))
return j;
return -1;
}
static int
resource_find(const char *name, int unit, const char *resname,
struct config_resource **result)
{
int i, j;
struct config_resource *res;
/*
* First check specific instances, then generic.
*/
for (i = 0; i < devtab_count; i++) {
if (devtab[i].unit < 0)
continue;
if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
res = devtab[i].resources;
for (j = 0; j < devtab[i].resource_count; j++, res++)
if (!strcmp(res->name, resname)) {
*result = res;
return 0;
}
}
}
for (i = 0; i < devtab_count; i++) {
if (devtab[i].unit >= 0)
continue;
/* XXX should this `&& devtab[i].unit == unit' be here? */
/* XXX if so, then the generic match does nothing */
if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
res = devtab[i].resources;
for (j = 0; j < devtab[i].resource_count; j++, res++)
if (!strcmp(res->name, resname)) {
*result = res;
return 0;
}
}
}
return ENOENT;
}
int
resource_int_value(const char *name, int unit, const char *resname, int *result)
{
int error;
struct config_resource *res;
if ((error = resource_find(name, unit, resname, &res)) != 0)
return error;
if (res->type != RES_INT)
return EFTYPE;
*result = res->u.intval;
return 0;
}
int
resource_long_value(const char *name, int unit, const char *resname,
long *result)
{
int error;
struct config_resource *res;
if ((error = resource_find(name, unit, resname, &res)) != 0)
return error;
if (res->type != RES_LONG)
return EFTYPE;
*result = res->u.longval;
return 0;
}
int
resource_string_value(const char *name, int unit, const char *resname,
char **result)
{
int error;
struct config_resource *res;
if ((error = resource_find(name, unit, resname, &res)) != 0)
return error;
if (res->type != RES_STRING)
return EFTYPE;
*result = res->u.stringval;
return 0;
}
int
resource_query_string(int i, const char *resname, const char *value)
{
if (i < 0)
i = 0;
else
i = i + 1;
for (; i < devtab_count; i++)
if (resource_match_string(i, resname, value) >= 0)
return i;
return -1;
}
int
resource_locate(int i, const char *resname)
{
if (i < 0)
i = 0;
else
i = i + 1;
for (; i < devtab_count; i++)
if (!strcmp(devtab[i].name, resname))
return i;
return -1;
}
int
resource_count(void)
{
return devtab_count;
}
char *
resource_query_name(int i)
{
return devtab[i].name;
}
int
resource_query_unit(int i)
{
return devtab[i].unit;
}
static int
resource_create(const char *name, int unit, const char *resname,
resource_type type, struct config_resource **result)
{
int i, j;
struct config_resource *res = NULL;
for (i = 0; i < devtab_count; i++) {
if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
res = devtab[i].resources;
break;
}
}
if (res == NULL) {
i = resource_new_name(name, unit);
if (i < 0)
return ENOMEM;
res = devtab[i].resources;
}
for (j = 0; j < devtab[i].resource_count; j++, res++) {
if (!strcmp(res->name, resname)) {
*result = res;
return 0;
}
}
j = resource_new_resname(i, resname, type);
if (j < 0)
return ENOMEM;
res = &devtab[i].resources[j];
*result = res;
return 0;
}
int
resource_set_int(const char *name, int unit, const char *resname, int value)
{
int error;
struct config_resource *res;
error = resource_create(name, unit, resname, RES_INT, &res);
if (error)
return error;
if (res->type != RES_INT)
return EFTYPE;
res->u.intval = value;
return 0;
}
int
resource_set_long(const char *name, int unit, const char *resname, long value)
{
int error;
struct config_resource *res;
error = resource_create(name, unit, resname, RES_LONG, &res);
if (error)
return error;
if (res->type != RES_LONG)
return EFTYPE;
res->u.longval = value;
return 0;
}
int
resource_set_string(const char *name, int unit, const char *resname,
const char *value)
{
int error;
struct config_resource *res;
error = resource_create(name, unit, resname, RES_STRING, &res);
if (error)
return error;
if (res->type != RES_STRING)
return EFTYPE;
if (res->u.stringval)
free(res->u.stringval, M_TEMP);
res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_NOWAIT);
if (res->u.stringval == NULL)
return ENOMEM;
strcpy(res->u.stringval, value);
return 0;
}
static void
resource_cfgload(void *dummy __unused)
{
struct config_resource *res, *cfgres;
int i, j;
int error;
char *name, *resname;
int unit;
resource_type type;
char *stringval;
int config_devtab_count;
config_devtab_count = devtab_count;
devtab = NULL;
devtab_count = 0;
for (i = 0; i < config_devtab_count; i++) {
name = config_devtab[i].name;
unit = config_devtab[i].unit;
for (j = 0; j < config_devtab[i].resource_count; j++) {
cfgres = config_devtab[i].resources;
resname = cfgres[j].name;
type = cfgres[j].type;
error = resource_create(name, unit, resname, type,
&res);
if (error) {
printf("create resource %s%d: error %d\n",
name, unit, error);
continue;
}
if (res->type != type) {
printf("type mismatch %s%d: %d != %d\n",
name, unit, res->type, type);
continue;
}
switch (type) {
case RES_INT:
res->u.intval = cfgres[j].u.intval;
break;
case RES_LONG:
res->u.longval = cfgres[j].u.longval;
break;
case RES_STRING:
if (res->u.stringval)
free(res->u.stringval, M_TEMP);
stringval = cfgres[j].u.stringval;
res->u.stringval = malloc(strlen(stringval) + 1,
M_TEMP, M_NOWAIT);
if (res->u.stringval == NULL)
break;
strcpy(res->u.stringval, stringval);
break;
default:
panic("unknown resource type %d\n", type);
}
}
}
}
SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0)
/*======================================*/
/*
* Some useful method implementations to make life easier for bus drivers.
*/
void
resource_list_init(struct resource_list *rl)
{
SLIST_INIT(rl);
}
void
resource_list_free(struct resource_list *rl)
{
struct resource_list_entry *rle;
while ((rle = SLIST_FIRST(rl)) != NULL) {
if (rle->res)
panic("resource_list_free: resource entry is busy");
SLIST_REMOVE_HEAD(rl, link);
free(rle, M_BUS);
}
}
void
resource_list_add(struct resource_list *rl,
int type, int rid,
u_long start, u_long end, u_long count)
{
struct resource_list_entry *rle;
rle = resource_list_find(rl, type, rid);
if (!rle) {
rle = malloc(sizeof(struct resource_list_entry), M_BUS, M_NOWAIT);
if (!rle)
panic("resource_list_add: can't record entry");
SLIST_INSERT_HEAD(rl, rle, link);
rle->type = type;
rle->rid = rid;
rle->res = NULL;
}
if (rle->res)
panic("resource_list_add: resource entry is busy");
rle->start = start;
rle->end = end;
rle->count = count;
}
struct resource_list_entry*
resource_list_find(struct resource_list *rl,
int type, int rid)
{
struct resource_list_entry *rle;
SLIST_FOREACH(rle, rl, link)
if (rle->type == type && rle->rid == rid)
return rle;
return NULL;
}
void
resource_list_delete(struct resource_list *rl,
int type, int rid)
{
struct resource_list_entry *rle = resource_list_find(rl, type, rid);
if (rle) {
SLIST_REMOVE(rl, rle, resource_list_entry, link);
free(rle, M_BUS);
}
}
struct resource *
resource_list_alloc(struct resource_list *rl,
device_t bus, device_t child,
int type, int *rid,
u_long start, u_long end,
u_long count, u_int flags)
{
struct resource_list_entry *rle = 0;
int passthrough = (device_get_parent(child) != bus);
int isdefault = (start == 0UL && end == ~0UL);
if (passthrough) {
return BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
type, rid,
start, end, count, flags);
}
rle = resource_list_find(rl, type, *rid);
if (!rle)
return 0; /* no resource of that type/rid */
if (rle->res)
panic("resource_list_alloc: resource entry is busy");
if (isdefault) {
start = rle->start;
count = max(count, rle->count);
end = max(rle->end, start + count - 1);
}
rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
type, rid, start, end, count, flags);
/*
* Record the new range.
*/
if (rle->res) {
rle->start = rman_get_start(rle->res);
rle->end = rman_get_end(rle->res);
rle->count = count;
}
return rle->res;
}
int
resource_list_release(struct resource_list *rl,
device_t bus, device_t child,
int type, int rid, struct resource *res)
{
struct resource_list_entry *rle = 0;
int passthrough = (device_get_parent(child) != bus);
int error;
if (passthrough) {
return BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
type, rid, res);
}
rle = resource_list_find(rl, type, rid);
if (!rle)
panic("resource_list_release: can't find resource");
if (!rle->res)
panic("resource_list_release: resource entry is not busy");
error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
type, rid, res);
if (error)
return error;
rle->res = NULL;
return 0;
}
/*
* Call DEVICE_IDENTIFY for each driver.
*/
int
bus_generic_probe(device_t dev)
{
devclass_t dc = dev->devclass;
driverlink_t dl;
for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link))
DEVICE_IDENTIFY(dl->driver, dev);
return 0;
}
int
bus_generic_attach(device_t dev)
{
device_t child;
for (child = TAILQ_FIRST(&dev->children);
child; child = TAILQ_NEXT(child, link))
device_probe_and_attach(child);
return 0;
}
int
bus_generic_detach(device_t dev)
{
device_t child;
int error;
if (dev->state != DS_ATTACHED)
return EBUSY;
for (child = TAILQ_FIRST(&dev->children);
child; child = TAILQ_NEXT(child, link))
if ((error = device_detach(child)) != 0)
return error;
return 0;
}
int
bus_generic_shutdown(device_t dev)
{
device_t child;
for (child = TAILQ_FIRST(&dev->children);
child; child = TAILQ_NEXT(child, link))
device_shutdown(child);
return 0;
}
int
bus_generic_suspend(device_t dev)
{
int error;
device_t child, child2;
for (child = TAILQ_FIRST(&dev->children);
child; child = TAILQ_NEXT(child, link)) {
error = DEVICE_SUSPEND(child);
if (error) {
for (child2 = TAILQ_FIRST(&dev->children);
child2 && child2 != child;
child2 = TAILQ_NEXT(child2, link))
DEVICE_RESUME(child2);
return (error);
}
}
return 0;
}
int
bus_generic_resume(device_t dev)
{
device_t child;
for (child = TAILQ_FIRST(&dev->children);
child; child = TAILQ_NEXT(child, link)) {
DEVICE_RESUME(child);
/* if resume fails, there's nothing we can usefully do... */
}
return 0;
}
int
bus_print_child_header (device_t dev, device_t child)
{
int retval = 0;
if (device_get_desc(child)) {
retval += device_printf(child, "<%s>",
device_get_desc(child));
} else {
retval += printf("%s", device_get_nameunit(child));
}
return (retval);
}
int
bus_print_child_footer (device_t dev, device_t child)
{
return(printf(" on %s\n", device_get_nameunit(dev)));
}
int
bus_generic_print_child(device_t dev, device_t child)
{
int retval = 0;
retval += bus_print_child_header(dev, child);
retval += bus_print_child_footer(dev, child);
return (retval);
}
int
bus_generic_read_ivar(device_t dev, device_t child, int index,
uintptr_t * result)
{
return ENOENT;
}
int
bus_generic_write_ivar(device_t dev, device_t child, int index,
uintptr_t value)
{
return ENOENT;
}
void
bus_generic_driver_added(device_t dev, driver_t *driver)
{
device_t child;
/*
* Make sure the class has a valid ops table.
*/
kobj_class_compile((kobj_class_t) driver);
DEVICE_IDENTIFY(driver, dev);
for (child = TAILQ_FIRST(&dev->children);
child; child = TAILQ_NEXT(child, link))
if (child->state == DS_NOTPRESENT)
device_probe_and_attach(child);
}
int
bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
int flags, driver_intr_t *intr, void *arg,
void **cookiep)
{
/* Propagate up the bus hierarchy until someone handles it. */
if (dev->parent)
return (BUS_SETUP_INTR(dev->parent, child, irq, flags,
intr, arg, cookiep));
else
return (EINVAL);
}
int
bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
void *cookie)
{
/* Propagate up the bus hierarchy until someone handles it. */
if (dev->parent)
return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
else
return (EINVAL);
}
struct resource *
bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
/* Propagate up the bus hierarchy until someone handles it. */
if (dev->parent)
return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
start, end, count, flags));
else
return (NULL);
}
int
bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
/* Propagate up the bus hierarchy until someone handles it. */
if (dev->parent)
return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid,
r));
else
return (EINVAL);
}
int
bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
/* Propagate up the bus hierarchy until someone handles it. */
if (dev->parent)
return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid,
r));
else
return (EINVAL);
}
int
bus_generic_deactivate_resource(device_t dev, device_t child, int type,
int rid, struct resource *r)
{
/* Propagate up the bus hierarchy until someone handles it. */
if (dev->parent)
return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
r));
else
return (EINVAL);
}
/*
* Some convenience functions to make it easier for drivers to use the
* resource-management functions. All these really do is hide the
* indirection through the parent's method table, making for slightly
* less-wordy code. In the future, it might make sense for this code
* to maintain some sort of a list of resources allocated by each device.
*/
struct resource *
bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
u_long count, u_int flags)
{
if (dev->parent == 0)
return (0);
return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
count, flags));
}
int
bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
{
if (dev->parent == 0)
return (EINVAL);
return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
}
int
bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
{
if (dev->parent == 0)
return (EINVAL);
return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
}
int
bus_release_resource(device_t dev, int type, int rid, struct resource *r)
{
if (dev->parent == 0)
return (EINVAL);
return (BUS_RELEASE_RESOURCE(dev->parent, dev,
type, rid, r));
}
int
bus_setup_intr(device_t dev, struct resource *r, int flags,
driver_intr_t handler, void *arg, void **cookiep)
{
if (dev->parent == 0)
return (EINVAL);
return (BUS_SETUP_INTR(dev->parent, dev, r, flags,
handler, arg, cookiep));
}
int
bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
{
if (dev->parent == 0)
return (EINVAL);
return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
}
int
bus_set_resource(device_t dev, int type, int rid,
u_long start, u_long count)
{
return BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
start, count);
}
int
bus_get_resource(device_t dev, int type, int rid,
u_long *startp, u_long *countp)
{
return BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
startp, countp);
}
u_long
bus_get_resource_start(device_t dev, int type, int rid)
{
u_long start, count;
int error;
error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
&start, &count);
if (error)
return 0;
return start;
}
u_long
bus_get_resource_count(device_t dev, int type, int rid)
{
u_long start, count;
int error;
error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
&start, &count);
if (error)
return 0;
return count;
}
void
bus_delete_resource(device_t dev, int type, int rid)
{
BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
}
static int
root_print_child(device_t dev, device_t child)
{
return (0);
}
static int
root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
void **cookiep)
{
/*
* If an interrupt mapping gets to here something bad has happened.
*/
panic("root_setup_intr");
}
static kobj_method_t root_methods[] = {
/* Device interface */
KOBJMETHOD(device_shutdown, bus_generic_shutdown),
KOBJMETHOD(device_suspend, bus_generic_suspend),
KOBJMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
KOBJMETHOD(bus_print_child, root_print_child),
KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
KOBJMETHOD(bus_setup_intr, root_setup_intr),
{ 0, 0 }
};
static driver_t root_driver = {
"root",
root_methods,
1, /* no softc */
};
device_t root_bus;
devclass_t root_devclass;
static int
root_bus_module_handler(module_t mod, int what, void* arg)
{
switch (what) {
case MOD_LOAD:
kobj_class_compile((kobj_class_t) &root_driver);
root_bus = make_device(NULL, "root", 0);
root_bus->desc = "System root bus";
kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
root_bus->driver = &root_driver;
root_bus->state = DS_ATTACHED;
root_devclass = devclass_find_internal("root", FALSE);
return 0;
case MOD_SHUTDOWN:
device_shutdown(root_bus);
return 0;
}
return 0;
}
static moduledata_t root_bus_mod = {
"rootbus",
root_bus_module_handler,
0
};
DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
void
root_bus_configure(void)
{
device_t dev;
PDEBUG(("."));
for (dev = TAILQ_FIRST(&root_bus->children); dev;
dev = TAILQ_NEXT(dev, link)) {
device_probe_and_attach(dev);
}
}
int
driver_module_handler(module_t mod, int what, void *arg)
{
int error, i;
struct driver_module_data *dmd;
devclass_t bus_devclass;
dmd = (struct driver_module_data *)arg;
bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE);
error = 0;
switch (what) {
case MOD_LOAD:
if (dmd->dmd_chainevh)
error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
for (i = 0; !error && i < dmd->dmd_ndrivers; i++) {
PDEBUG(("Loading module: driver %s on bus %s",
DRIVERNAME(dmd->dmd_drivers[i]),
dmd->dmd_busname));
error = devclass_add_driver(bus_devclass,
dmd->dmd_drivers[i]);
}
if (error)
break;
/*
* The drivers loaded in this way are assumed to all
* implement the same devclass.
*/
*dmd->dmd_devclass =
devclass_find_internal(dmd->dmd_drivers[0]->name,
TRUE);
break;
case MOD_UNLOAD:
for (i = 0; !error && i < dmd->dmd_ndrivers; i++) {
PDEBUG(("Unloading module: driver %s from bus %s",
DRIVERNAME(dmd->dmd_drivers[i]),
dmd->dmd_busname));
error = devclass_delete_driver(bus_devclass,
dmd->dmd_drivers[i]);
}
if (!error && dmd->dmd_chainevh)
error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
break;
}
return (error);
}
#ifdef BUS_DEBUG
/* the _short versions avoid iteration by not calling anything that prints
* more than oneliners. I love oneliners.
*/
static void
print_device_short(device_t dev, int indent)
{
if (!dev)
return;
indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
dev->unit, dev->desc,
(dev->parent? "":"no "),
(TAILQ_EMPTY(&dev->children)? "no ":""),
(dev->flags&DF_ENABLED? "enabled,":"disabled,"),
(dev->flags&DF_FIXEDCLASS? "fixed,":""),
(dev->flags&DF_WILDCARD? "wildcard,":""),
(dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
(dev->ivars? "":"no "),
(dev->softc? "":"no "),
dev->busy));
}
static void
print_device(device_t dev, int indent)
{
if (!dev)
return;
print_device_short(dev, indent);
indentprintf(("Parent:\n"));
print_device_short(dev->parent, indent+1);
indentprintf(("Driver:\n"));
print_driver_short(dev->driver, indent+1);
indentprintf(("Devclass:\n"));
print_devclass_short(dev->devclass, indent+1);
}
void
print_device_tree_short(device_t dev, int indent)
/* print the device and all its children (indented) */
{
device_t child;
if (!dev)
return;
print_device_short(dev, indent);
for (child = TAILQ_FIRST(&dev->children); child;
child = TAILQ_NEXT(child, link))
print_device_tree_short(child, indent+1);
}
void
print_device_tree(device_t dev, int indent)
/* print the device and all its children (indented) */
{
device_t child;
if (!dev)
return;
print_device(dev, indent);
for (child = TAILQ_FIRST(&dev->children); child;
child = TAILQ_NEXT(child, link))
print_device_tree(child, indent+1);
}
static void
print_driver_short(driver_t *driver, int indent)
{
if (!driver)
return;
indentprintf(("driver %s: softc size = %d\n",
driver->name, driver->size));
}
static void
print_driver(driver_t *driver, int indent)
{
if (!driver)
return;
print_driver_short(driver, indent);
}
static void
print_driver_list(driver_list_t drivers, int indent)
{
driverlink_t driver;
for (driver = TAILQ_FIRST(&drivers); driver;
driver = TAILQ_NEXT(driver, link))
print_driver(driver->driver, indent);
}
static void
print_devclass_short(devclass_t dc, int indent)
{
if ( !dc )
return;
indentprintf(("devclass %s: max units = %d\n",
dc->name, dc->maxunit));
}
static void
print_devclass(devclass_t dc, int indent)
{
int i;
if ( !dc )
return;
print_devclass_short(dc, indent);
indentprintf(("Drivers:\n"));
print_driver_list(dc->drivers, indent+1);
indentprintf(("Devices:\n"));
for (i = 0; i < dc->maxunit; i++)
if (dc->devices[i])
print_device(dc->devices[i], indent+1);
}
void
print_devclass_list_short(void)
{
devclass_t dc;
printf("Short listing of devclasses, drivers & devices:\n");
for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link))
print_devclass_short(dc, 0);
}
void
print_devclass_list(void)
{
devclass_t dc;
printf("Full listing of devclasses, drivers & devices:\n");
for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link))
print_devclass(dc, 0);
}
#endif
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