diff options
Diffstat (limited to 'sys/kern/subr_bus.c')
| -rw-r--r-- | sys/kern/subr_bus.c | 1572 |
1 files changed, 1572 insertions, 0 deletions
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c new file mode 100644 index 0000000..dc4c88a --- /dev/null +++ b/sys/kern/subr_bus.c @@ -0,0 +1,1572 @@ +/*- + * 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 1.13 1999/01/10 22:04:05 n_hibma Exp $ + */ + +#include <sys/param.h> +#include <sys/queue.h> +#include <sys/malloc.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus_private.h> +#include <sys/systm.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 + + +/* + * Method table handling + */ +static int next_method_offset = 1; +static int methods_count = 0; +static int methods_size = 0; + +struct method { + int offset; + char* name; +}; + +static struct method *methods = 0; + +static void +register_method(struct device_op_desc *desc) +{ + int i; + struct method* m; + + for (i = 0; i < methods_count; i++) + if (!strcmp(methods[i].name, desc->name)) { + desc->offset = methods[i].offset; + PDEBUG(("methods[%d] has the same name, %s, with offset %d", + i, desc->name, desc->offset)); + return; + } + + if (methods_count == methods_size) { + struct method* p; + + methods_size += 10; + p = (struct method*) malloc(methods_size * sizeof(struct method), + M_DEVBUF, M_NOWAIT); + if (!p) + panic("register_method: out of memory"); + if (methods) { + bcopy(methods, p, methods_count * sizeof(struct method)); + free(methods, M_DEVBUF); + } + methods = p; + } + m = &methods[methods_count++]; + m->name = malloc(strlen(desc->name) + 1, M_DEVBUF, M_NOWAIT); + if (!m->name) + panic("register_method: out of memory"); + strcpy(m->name, desc->name); + desc->offset = m->offset = next_method_offset++; +} + +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; + int i; + + /* + * First register any methods which need it. + */ + for (i = 0, m = driver->methods; m->desc; i++, m++) + if (!m->desc->offset) + register_method(m->desc); + else + PDEBUG(("offset not equal to zero, method desc %d left as is", i)); + + /* + * 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"); + + ops->maxoffset = next_method_offset; + for (i = 0; i < next_method_offset; i++) + ops->methods[i] = error_method; + 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; +} + +/* + * 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; + 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_find(const char *classname) +{ + return devclass_find_internal(classname, FALSE); +} + +int +devclass_add_driver(devclass_t dc, driver_t *driver) +{ + PDEBUG(("%s", DRIVERNAME(driver))); + /* + * Compile the drivers methods. + */ + compile_methods(driver); + + /* + * Make sure the devclass which the driver is implementing exists. + */ + devclass_find_internal(driver->name, TRUE); + + TAILQ_INSERT_TAIL(&dc->drivers, driver, link); + + return 0; +} + +int +devclass_delete_driver(devclass_t busclass, driver_t *driver) +{ + devclass_t dc = devclass_find(driver->name); + device_t dev; + int i; + int error; + + PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); + + if (!dc) + return 0; + + /* + * Disassociate from any devices. We iterate through all the + * devices in the devclass of the driver and detach any which are + * using the driver. + */ + for (i = 0; i < dc->maxunit; i++) { + if (dc->devices[i]) { + dev = dc->devices[i]; + if (dev->driver == driver) { + if (error = device_detach(dev)) + return error; + device_set_driver(dev, NULL); + } + } + } + + TAILQ_REMOVE(&busclass->drivers, driver, link); + return 0; +} + +driver_t * +devclass_find_driver(devclass_t dc, const char *classname) +{ + driver_t *driver; + + PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); + + for (driver = TAILQ_FIRST(&dc->drivers); driver; + driver = TAILQ_NEXT(driver, link)) { + if (!strcmp(driver->name, classname)) + return driver; + } + + PDEBUG(("not found")); + return NULL; +} + +const char * +devclass_get_name(devclass_t dc) +{ + return dc->name; +} + +device_t +devclass_get_device(devclass_t dc, int unit) +{ + if (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; + + 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 error; + + PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); + + if (error = devclass_alloc_unit(dc, &dev->unit)) + return error; + dc->devices[dev->unit] = dev; + dev->devclass = dc; + 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; + while (dc->nextunit > 0 && dc->devices[dc->nextunit - 1] == NULL) + dc->nextunit--; + return 0; +} + +static device_t +make_device(device_t parent, const char *name, + int unit, void *ivars) +{ + device_t dev; + devclass_t dc; + int error; + + 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; + } + + if (error = devclass_alloc_unit(dc, &unit)) + return NULL; + } else + dc = NULL; + + dev = malloc(sizeof(struct device), M_DEVBUF, M_NOWAIT); + if (!dev) + return 0; + + dev->parent = parent; + TAILQ_INIT(&dev->children); + dev->ops = &null_ops; + dev->driver = NULL; + dev->devclass = dc; + dev->unit = unit; + dev->desc = NULL; + dev->busy = 0; + dev->flags = DF_ENABLED; + if (unit == -1) + dev->flags |= DF_WILDCARD; + if (name) + dev->flags |= DF_FIXEDCLASS; + dev->ivars = ivars; + dev->softc = NULL; + + if (dc) + dc->devices[unit] = dev; + + dev->state = DS_NOTPRESENT; + + return dev; +} + +static void +device_print_child(device_t dev, device_t child) +{ + printf("%s%d", device_get_name(child), device_get_unit(child)); + if (device_is_alive(child)) { + if (device_get_desc(child)) + printf(": <%s>", device_get_desc(child)); + BUS_PRINT_CHILD(dev, child); + } else + printf(" not found"); + printf("\n"); +} + +device_t +device_add_child(device_t dev, const char *name, int unit, void *ivars) +{ + device_t child; + + PDEBUG(("%s at %s as unit %d with%s ivars", + name, DEVICENAME(dev), unit, (ivars? "":"out"))); + + child = make_device(dev, name, unit, ivars); + + if (child) + TAILQ_INSERT_TAIL(&dev->children, child, link); + else + PDEBUG(("%s failed", name)); + + return child; +} + +device_t +device_add_child_after(device_t dev, device_t place, const char *name, + int unit, void *ivars) +{ + device_t child; + + PDEBUG(("%s at %s after %s as unit %d with%s ivars", + name, DEVICENAME(dev), DEVICENAME(place), unit, (ivars? "":"out"))); + + child = make_device(dev, name, unit, ivars); + + if (place) { + TAILQ_INSERT_AFTER(&dev->children, place, dev, link); + } else { + TAILQ_INSERT_HEAD(&dev->children, dev, 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)) + return error; + if (child->devclass) + devclass_delete_device(child->devclass, child); + TAILQ_REMOVE(&dev->children, child, link); + 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 driver_t * +first_matching_driver(devclass_t dc, device_t dev) +{ + if (dev->devclass) + return devclass_find_driver(dc, dev->devclass->name); + else + return TAILQ_FIRST(&dc->drivers); +} + +static driver_t * +next_matching_driver(devclass_t dc, device_t dev, driver_t *last) +{ + if (dev->devclass) { + driver_t *driver; + for (driver = TAILQ_NEXT(last, link); driver; + driver = TAILQ_NEXT(driver, link)) + if (!strcmp(dev->devclass->name, driver->name)) + return driver; + return NULL; + } else + return TAILQ_NEXT(last, link); +} + +static int +device_probe_child(device_t dev, device_t child) +{ + devclass_t dc; + driver_t *driver; + + dc = dev->devclass; + if (dc == NULL) + panic("device_probe_child: parent device has no devclass"); + + if (child->state == DS_ALIVE) + return 0; + + for (driver = first_matching_driver(dc, child); + driver; + driver = next_matching_driver(dc, child, driver)) { + PDEBUG(("Trying %s", DRIVERNAME(driver))); + device_set_driver(child, driver); + if (DEVICE_PROBE(child) == 0) { + if (!child->devclass) + device_set_devclass(child, driver->name); + 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; + + 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; +} + +int +device_get_unit(device_t dev) +{ + return dev->unit; +} + +const char * +device_get_desc(device_t dev) +{ + return dev->desc; +} + +void +device_print_prettyname(device_t dev) +{ + const char *name = device_get_name(dev); + + if (name == 0) + name = "(no driver assigned)"; + printf("%s%d: ", name, device_get_unit(dev)); +} + +void +device_printf(device_t dev, const char * fmt, ...) +{ + va_list ap; + + device_print_prettyname(dev); + va_start(ap, fmt); + vprintf(fmt, ap); + va_end(ap); +} + +void +device_set_desc(device_t dev, const char* desc) +{ + dev->desc = desc; +} + +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; + } +} + +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) { + 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 { + 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)) + return error; + + 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); +} + +/* + * Access functions for device resources. + */ +extern struct config_device devtab[]; +extern int devtab_count; + +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 TRUE; + return FALSE; +} + +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; + 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)) + return i; + return -1; +} + +char * +resource_query_name(int i) +{ + return devtab[i].name; +} + +int +resource_query_unit(int i) +{ + return devtab[i].unit; +} + + +/* + * Some useful method implementations to make life easier for bus drivers. + */ +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)) + 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; +} + +void +bus_generic_print_child(device_t dev, device_t child) +{ + printf(" on %s%d", device_get_name(dev), device_get_unit(dev)); +} + +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; +} + +int +bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, + 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, 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)); +} + +static void +root_print_child(device_t dev, device_t child) +{ +} + +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_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, + DRIVER_TYPE_MISC, + 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; + } + + 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->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 |
