diff options
Diffstat (limited to 'sys/kern/subr_bus.c')
| -rw-r--r-- | sys/kern/subr_bus.c | 2408 |
1 files changed, 2408 insertions, 0 deletions
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c new file mode 100644 index 0000000..e6c6bcf --- /dev/null +++ b/sys/kern/subr_bus.c @@ -0,0 +1,2408 @@ +/*- + * 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 +#include <sys/sysctl.h> + +static int bus_debug = 1; +SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0, "Debug bus code"); + +#define PDEBUG(a) if (bus_debug) {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 + +extern char static_hints[]; +static int hints_loaded; + +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. Also increase the reference count + * so that the class doesn't get freed when the last instance + * goes. This means we can safely use static methods and avoids a + * double-free in devclass_delete_driver. + */ + 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); + /* find the next available slot */ + while (++unit < dc->maxunit && dc->devices[unit] != NULL) + ; + } + } + else { + /* Unwired device, find the next available slot for it */ + 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 = roundup((unit + 1), 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); + } 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. + */ + +/* Runtime version */ +static struct config_device *devtab; +static int devtab_count = 0; + +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_hard(const char *cp, const char *name, int unit, + const char *resname, struct config_resource **result) +{ + char match[256]; + int matchlen; + char *op; + long val; + + snprintf(match, sizeof(match), "hint.%s.%d.%s=", name, unit, resname); + matchlen = strlen(match); + while (cp) { + if (strncmp(match, cp, matchlen) == 0) + break; + while (*cp != '\0') + cp++; + cp++; + if (*cp == '\0') { + cp = NULL; + break; + } + } + if (cp) + cp += matchlen; /* skip over name and '=' */ + else + return ENOENT; + val = strtoul(cp, &op, 0); + if (*cp != '\0' && *op == '\0') { + (*result)->type = RES_INT; + (*result)->u.intval = val; + } else { + (*result)->type = RES_STRING; + (*result)->u.stringval = cp; + } + return 0; +} + +static int +resource_find(const char *name, int unit, const char *resname, + struct config_resource **result) +{ + int i, j; + struct config_resource *res; + + if (!hints_loaded) { + /* First specific, then generic. Dynamic over static. */ + i = resource_find_hard(kern_envp, name, unit, resname, result); + if (i == 0) + return 0; + i = resource_find_hard(static_hints, name, unit, resname, + result); + if (i == 0) + return 0; + i = resource_find_hard(kern_envp, name, -1, resname, result); + if (i == 0) + return 0; + i = resource_find_hard(static_hints, name, -1, resname, result); + return i; + } + + /* + * 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; + if (!strcmp(devtab[i].name, name)) { + 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; +} + +/* + * We use the identify routine to get the hints for all the other devices. + * Strings that are all digits or begin with 0x are integers. + * + * hint.aha.0.bus_speedup=1 + * hint.aha.1.irq=10 + * hint.wl.0.netid=PLUG + * hint.wl.1.netid=XYZZY + */ +static void +hint_load(char *cp) +{ + char *ep, *op, *walker; + int len; + int val; + char name[20]; + int unit; + char resname[255]; + + for (ep = cp; *ep != '=' && *ep != '\0'; ep++) + ; + len = ep - cp; + if (*ep == '=') + ep++; + if (strncmp(cp, "hint.", 5) != 0) + return; + walker = cp; + walker += 5; + op = walker; + while (*walker && *walker != '.') + walker++; + if (*walker != '.') + return; + if (walker - op > sizeof(name)) + return; + strncpy(name, op, walker - op); + name[walker - op] = '\0'; + walker++; + op = walker; + while (*walker && *walker != '.') + walker++; + if (*walker != '.') + return; + unit = strtoul(op, &walker, 0); + if (*walker != '.') + return; + walker++; + op = walker; + while (*walker && *walker != '=') + walker++; + if (*walker != '=') + return; + if (walker - op > sizeof(resname)) + return; + strncpy(resname, op, walker - op); + resname[walker - op] = '\0'; + walker++; + if (walker != ep) + return; + if (bootverbose) + printf("Setting %s %d %s to ", name, unit, resname); + val = strtoul(ep, &op, 0); + if (*ep != '\0' && *op == '\0') { + resource_set_int(name, unit, resname, val); + if (bootverbose) + printf("%d (int)\n", val); + } else { + resource_set_string(name, unit, resname, ep); + if (bootverbose) + printf("%s (string)\n", ep); + } +} + + +static void +hints_load(void *dummy __unused) +{ + char *cp; + + cp = static_hints; + while (cp) { + hint_load(cp); + while (*cp != '\0') + cp++; + cp++; + if (*cp == '\0') + break; + } + cp = kern_envp; + while (cp) { + hint_load(cp); + while (*cp != '\0') + cp++; + cp++; + if (*cp == '\0') + break; + } + hints_loaded++; +} +SYSINIT(cfghints, SI_SUB_KMEM, SI_ORDER_ANY + 60, hints_load, 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; + + 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 |
