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freebsd-nq/sys/kern/subr_bus.c
Matthew N. Dodd f4e3b1e7dd Fix a typo. 
Back out a few lines that I haven't dealt with properly yet.

Snickered at by: Mike Smith
1999-07-29 01:51:49 +00:00

2389 lines
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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.
*
* $Id: subr_bus.c,v 1.32 1999/07/29 01:02:58 mdodd Exp $
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.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() */
#include "opt_bus.h"
#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_method_list(device_method_t *m, int indent);
static void print_device_ops(device_ops_t ops, int indent);
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_method_list(m,i) /* nop */
#define print_device_ops(o,i) /* 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
/*
* Method table handling
*/
static int error_method(void);
static int next_method_offset = 1;
LIST_HEAD(methodlist, method) methods;
struct method {
LIST_ENTRY(method) link; /* linked list of methods */
int offset; /* offset in method table */
int refs; /* count of device_op_desc users */
devop_t deflt; /* default implementation */
char* name; /* unique name of method */
};
static void
register_method(struct device_op_desc *desc)
{
struct method* m;
if (desc->method) {
desc->method->refs++;
return;
}
/*
* Make sure that desc->deflt is always valid to simplify dispatch.
*/
if (!desc->deflt)
desc->deflt = error_method;
for (m = LIST_FIRST(&methods); m; m = LIST_NEXT(m, link)) {
if (!strcmp(m->name, desc->name)) {
desc->offset = m->offset;
desc->method = m;
m->refs++;
PDEBUG(("methods %x has the same name, %s, with offset %d",
m, desc->name, desc->offset));
return;
}
}
m = (struct method *) malloc(sizeof(struct method)
+ strlen(desc->name) + 1,
M_DEVBUF, M_NOWAIT);
if (!m)
panic("register_method: out of memory");
bzero(m, sizeof(struct method) + strlen(desc->name) + 1);
m->offset = next_method_offset++;
m->refs = 1;
m->deflt = desc->deflt;
m->name = (char*) (m + 1);
strcpy(m->name, desc->name);
LIST_INSERT_HEAD(&methods, m, link);
desc->offset = m->offset;
desc->method = m;
}
static void
unregister_method(struct device_op_desc *desc)
{
struct method *m = desc->method;
m->refs--;
if (m->refs == 0) {
LIST_REMOVE(m, link);
free(m, M_DEVBUF);
}
desc->method = 0;
}
static int error_method(void)
{
return ENXIO;
}
static struct device_ops null_ops = {
1,
{ error_method }
};
static void
compile_methods(driver_t *driver)
{
device_ops_t ops;
struct device_method *m;
struct method *cm;
int i;
/*
* First register any methods which need it.
*/
for (i = 0, m = driver->methods; m->desc; i++, m++)
register_method(m->desc);
/*
* Then allocate the compiled op table.
*/
ops = malloc(sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t),
M_DEVBUF, M_NOWAIT);
if (!ops)
panic("compile_methods: out of memory");
bzero(ops, sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t));
ops->maxoffset = next_method_offset;
/* Fill in default methods and then overwrite with driver methods */
for (i = 0; i < next_method_offset; i++)
ops->methods[i] = error_method;
for (cm = LIST_FIRST(&methods); cm; cm = LIST_NEXT(cm, link)) {
if (cm->deflt)
ops->methods[cm->offset] = cm->deflt;
}
for (i = 0, m = driver->methods; m->desc; i++, m++)
ops->methods[m->desc->offset] = m->func;
PDEBUG(("%s has %d method%s, wasting %d bytes",
DRIVERNAME(driver), i, (i==1?"":"s"),
(next_method_offset-i)*sizeof(devop_t)));
driver->ops = ops;
}
static void
free_methods(driver_t *driver)
{
int i;
struct device_method *m;
/*
* Unregister any methods which are no longer used.
*/
for (i = 0, m = driver->methods; m->desc; i++, m++)
unregister_method(m->desc);
/*
* Free memory and clean up.
*/
free(driver->ops, M_DEVBUF);
driver->ops = 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_DEVBUF, 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;
dc->nextunit = 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_DEVBUF, M_NOWAIT);
if (!dl)
return ENOMEM;
bzero(dl, sizeof *dl);
/*
* Compile the driver's methods.
*/
if (!driver->ops)
compile_methods(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_DEVBUF);
driver->refs--;
if (driver->refs == 0)
free_methods(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;
if (unit < 0 || unit >= dc->maxunit)
return NULL;
dev = dc->devices[unit];
if (!dev || dev->state < DS_ATTACHED)
return NULL;
return dev->softc;
}
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) {
device_t dev;
dev = devclass_get_device(dc, unit);
if (dev) {
printf("devclass_alloc_unit: %s%d already exists, using next available unit number\n", dc->name, unit);
unit = -1;
}
}
if (unit == -1) {
unit = dc->nextunit;
dc->nextunit++;
} else if (dc->nextunit <= unit)
dc->nextunit = unit + 1;
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_DEVBUF, 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_DEVBUF);
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_DEVBUF, M_NOWAIT);
if (!dev->nameunit)
return ENOMEM;
bzero(dev->nameunit, buflen);
if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
free(dev->nameunit, M_DEVBUF);
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_DEVBUF);
dev->nameunit = NULL;
while (dc->nextunit > 0 && dc->devices[dc->nextunit - 1] == NULL)
dc->nextunit--;
#ifdef DEVICE_SYSCTLS
device_unregister_oids(dev);
#endif
return 0;
}
static device_t
make_device(device_t parent, const char *name,
int unit, void *ivars)
{
device_t dev;
devclass_t dc;
PDEBUG(("%s at %s as unit %d with%s ivars",
name, DEVICENAME(parent), unit, (ivars? "":"out")));
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_DEVBUF, M_NOWAIT);
if (!dev)
return 0;
bzero(dev, sizeof(struct device));
dev->parent = parent;
TAILQ_INIT(&dev->children);
dev->ops = &null_ops;
dev->driver = NULL;
dev->devclass = NULL;
dev->unit = unit;
dev->nameunit = NULL;
dev->desc = NULL;
dev->busy = 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 = ivars;
dev->softc = NULL;
dev->state = DS_NOTPRESENT;
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, void *ivars)
{
return device_add_child_ordered(dev, 0, name, unit, ivars);
}
device_t
device_add_child_ordered(device_t dev, int order,
const char *name, int unit, void *ivars)
{
device_t child;
device_t place;
PDEBUG(("%s at %s with order %d as unit %d with%s ivars",
name, DEVICENAME(dev), order, unit, (ivars? "":"out")));
child = make_device(dev, name, unit, ivars);
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_DEVBUF);
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;
dc = dev->devclass;
if (dc == NULL)
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);
result = DEVICE_PROBE(child);
/*
* 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)
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;
}
int
device_print_prettyname(device_t dev)
{
const char *name = device_get_name(dev);
if (name == 0)
name = "(no driver assigned)";
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_DEVBUF);
dev->flags &= ~DF_DESCMALLOCED;
dev->desc = NULL;
}
if (copy && desc) {
dev->desc = malloc(strlen(desc) + 1, M_DEVBUF, 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_get_softc(device_t dev)
{
return dev->softc;
}
void *
device_get_ivars(device_t dev)
{
return dev->ivars;
}
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 (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_DEVBUF);
dev->softc = NULL;
}
dev->ops = &null_ops;
dev->driver = driver;
if (driver) {
dev->ops = driver->ops;
dev->softc = malloc(driver->softc, M_DEVBUF, M_NOWAIT);
if (!dev->softc) {
dev->ops = &null_ops;
dev->driver = NULL;
return ENOMEM;
}
bzero(dev->softc, driver->softc);
}
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 {
BUS_PROBE_NOMATCH(bus, dev);
}
} else {
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;
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);
}
#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(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, 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, char *resname, 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, 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, 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, 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, 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, char *resname, 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, 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(char *name, int unit, 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(char *name, int unit, 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(char *name, int unit, 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(char *name, int unit, char *resname, 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_DEVBUF);
}
}
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_DEVBUF, 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_DEVBUF);
}
}
struct resource *
resource_list_alloc(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 *rl;
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);
}
rl = device_get_ivars(child);
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(device_t bus, device_t child,
int type, int rid, struct resource *res)
{
struct resource_list *rl;
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);
}
rl = device_get_ivars(child);
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;
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));
}
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 device_method_t root_methods[] = {
/* Device interface */
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, root_print_child),
DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
DEVMETHOD(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:
compile_methods(&root_driver);
root_bus = make_device(NULL, "root", 0, NULL);
root_bus->desc = "System root bus";
root_bus->ops = root_driver.ops;
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:
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]);
}
break;
}
if (!error && dmd->dmd_chainevh)
error = dmd->dmd_chainevh(mod, what, dmd->dmd_chainarg);
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_method_list(device_method_t *m, int indent)
{
int i;
if (!m)
return;
for (i = 0; m->desc; i++, m++)
indentprintf(("method %d: %s, offset=%d\n",
i, m->desc->name, m->desc->offset));
}
static void
print_device_ops(device_ops_t ops, int indent)
{
int i;
int count = 0;
if (!ops)
return;
/* we present a list of the methods that are pointing to the
* error_method, but ignore the 0'th elements; it is always
* error_method.
*/
for (i = 1; i < ops->maxoffset; i++) {
if (ops->methods[i] == error_method) {
if (count == 0)
indentprintf(("error_method:"));
printf(" %d", i);
count++;
}
}
if (count)
printf("\n");
indentprintf(("(%d method%s, %d valid, %d error_method%s)\n",
ops->maxoffset-1, (ops->maxoffset-1 == 1? "":"s"),
ops->maxoffset-1-count,
count, (count == 1? "":"'s")));
}
static void
print_device_short(device_t dev, int indent)
{
if (!dev)
return;
indentprintf(("device %d: <%s> %sparent,%schildren,%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(("Methods:\n"));
print_device_ops(dev->ops, 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: type = %s%s%s%s, softc size = %d\n",
driver->name,
/* yes, I know this looks silly, but going to bed at
* two o'clock and having to get up at 7:30 again is silly
* as well. As is sticking your head in a bucket of water.
*/
(driver->type == DRIVER_TYPE_TTY? "tty":""),
(driver->type == DRIVER_TYPE_BIO? "bio":""),
(driver->type == DRIVER_TYPE_NET? "net":""),
(driver->type == DRIVER_TYPE_MISC? "misc":""),
driver->softc));
}
static void
print_driver(driver_t *driver, int indent)
{
if (!driver)
return;
print_driver_short(driver, indent);
indentprintf(("Methods:\n"));
print_method_list(driver->methods, indent+1);
indentprintf(("Operations:\n"));
print_device_ops(driver->ops, indent+1);
}
static void
print_driver_list(driver_list_t drivers, int indent)
{
driver_t *driver;
for (driver = TAILQ_FIRST(&drivers); driver;
driver = TAILQ_NEXT(driver, link))
print_driver(driver, indent);
}
static void
print_devclass_short(devclass_t dc, int indent)
{
if ( !dc )
return;
indentprintf(("devclass %s: max units = %d, next unit = %d\n",
dc->name, dc->maxunit, dc->nextunit));
}
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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