/*- * 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 1.20 1999/05/08 21:59:35 dfr Exp $ */ #include #include #include #include #include #include #include #include #include /* 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; iJmethod) { desc->method->refs++; return; } 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_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 (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; 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 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)) != 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; } 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); } 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 { 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. */ 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; } 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; } 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 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_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