File:  [DragonFly] / src / sys / kern / subr_bus.c
Revision 1.16: download - view: text, annotated - select for diffs
Thu Apr 1 08:41:24 2004 UTC (10 years, 7 months ago) by joerg
Branches: MAIN
CVS tags: HEAD
KObj extension stage I/III

Isolate the reference counting for kobj classes in special functions to
allow clean locking in the next step.

Merge all calls of kobj_class_compile either into the new
kobj_class_instantiate or into kobj_init and make it static. Same for
kobj_class_free.

Remove kobj_class_compile_static, it wasn't used and is pretty pointless
since the kobj framework is not used before the VM subsystem has been
initialized.

    1: /*
    2:  * Copyright (c) 1997,1998 Doug Rabson
    3:  * All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that the following conditions
    7:  * are met:
    8:  * 1. Redistributions of source code must retain the above copyright
    9:  *    notice, this list of conditions and the following disclaimer.
   10:  * 2. Redistributions in binary form must reproduce the above copyright
   11:  *    notice, this list of conditions and the following disclaimer in the
   12:  *    documentation and/or other materials provided with the distribution.
   13:  *
   14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24:  * SUCH DAMAGE.
   25:  *
   26:  * $FreeBSD: src/sys/kern/subr_bus.c,v 1.54.2.9 2002/10/10 15:13:32 jhb Exp $
   27:  * $DragonFly: src/sys/kern/subr_bus.c,v 1.16 2004/04/01 08:41:24 joerg Exp $
   28:  */
   29: 
   30: #include "opt_bus.h"
   31: 
   32: #include <sys/param.h>
   33: #include <sys/queue.h>
   34: #include <sys/malloc.h>
   35: #include <sys/kernel.h>
   36: #include <sys/module.h>
   37: #ifdef DEVICE_SYSCTLS
   38: #include <sys/sysctl.h>
   39: #endif
   40: #include <sys/kobj.h>
   41: #include <sys/bus_private.h>
   42: #include <sys/systm.h>
   43: #include <machine/bus.h>
   44: #include <sys/rman.h>
   45: #include <machine/stdarg.h>	/* for device_printf() */
   46: 
   47: MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
   48: 
   49: #ifdef BUS_DEBUG
   50: #define PDEBUG(a)	(printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n"))
   51: #define DEVICENAME(d)	((d)? device_get_name(d): "no device")
   52: #define DRIVERNAME(d)	((d)? d->name : "no driver")
   53: #define DEVCLANAME(d)	((d)? d->name : "no devclass")
   54: 
   55: /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 
   56:  * prevent syslog from deleting initial spaces
   57:  */
   58: #define indentprintf(p)	do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf("  "); printf p ; } while(0)
   59: 
   60: static void	print_device_short(device_t dev, int indent);
   61: static void	print_device(device_t dev, int indent);
   62: void		print_device_tree_short(device_t dev, int indent);
   63: void		print_device_tree(device_t dev, int indent);
   64: static void	print_driver_short(driver_t *driver, int indent);
   65: static void	print_driver(driver_t *driver, int indent);
   66: static void	print_driver_list(driver_list_t drivers, int indent);
   67: static void	print_devclass_short(devclass_t dc, int indent);
   68: static void	print_devclass(devclass_t dc, int indent);
   69: void		print_devclass_list_short(void);
   70: void		print_devclass_list(void);
   71: 
   72: #else
   73: /* Make the compiler ignore the function calls */
   74: #define PDEBUG(a)			/* nop */
   75: #define DEVICENAME(d)			/* nop */
   76: #define DRIVERNAME(d)			/* nop */
   77: #define DEVCLANAME(d)			/* nop */
   78: 
   79: #define print_device_short(d,i)		/* nop */
   80: #define print_device(d,i)		/* nop */
   81: #define print_device_tree_short(d,i)	/* nop */
   82: #define print_device_tree(d,i)		/* nop */
   83: #define print_driver_short(d,i)		/* nop */
   84: #define print_driver(d,i)		/* nop */
   85: #define print_driver_list(d,i)		/* nop */
   86: #define print_devclass_short(d,i)	/* nop */
   87: #define print_devclass(d,i)		/* nop */
   88: #define print_devclass_list_short()	/* nop */
   89: #define print_devclass_list()		/* nop */
   90: #endif
   91: 
   92: #ifdef DEVICE_SYSCTLS
   93: static void	device_register_oids(device_t dev);
   94: static void	device_unregister_oids(device_t dev);
   95: #endif
   96: 
   97: kobj_method_t null_methods[] = {
   98: 	{ 0, 0 }
   99: };
  100: 
  101: DEFINE_CLASS(null, null_methods, 0);
  102: 
  103: /*
  104:  * Devclass implementation
  105:  */
  106: 
  107: static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
  108: 
  109: static devclass_t
  110: devclass_find_internal(const char *classname, int create)
  111: {
  112: 	devclass_t dc;
  113: 
  114: 	PDEBUG(("looking for %s", classname));
  115: 	if (classname == NULL)
  116: 		return(NULL);
  117: 
  118: 	TAILQ_FOREACH(dc, &devclasses, link)
  119: 		if (!strcmp(dc->name, classname))
  120: 			return(dc);
  121: 
  122: 	PDEBUG(("%s not found%s", classname, (create? ", creating": "")));
  123: 	if (create) {
  124: 		dc = malloc(sizeof(struct devclass) + strlen(classname) + 1,
  125: 			    M_BUS, M_INTWAIT | M_ZERO);
  126: 		if (!dc)
  127: 			return NULL;
  128: 		dc->name = (char*) (dc + 1);
  129: 		strcpy(dc->name, classname);
  130: 		dc->devices = NULL;
  131: 		dc->maxunit = 0;
  132: 		TAILQ_INIT(&dc->drivers);
  133: 		TAILQ_INSERT_TAIL(&devclasses, dc, link);
  134: 	}
  135: 
  136: 	return(dc);
  137: }
  138: 
  139: devclass_t
  140: devclass_create(const char *classname)
  141: {
  142: 	return(devclass_find_internal(classname, TRUE));
  143: }
  144: 
  145: devclass_t
  146: devclass_find(const char *classname)
  147: {
  148: 	return(devclass_find_internal(classname, FALSE));
  149: }
  150: 
  151: int
  152: devclass_add_driver(devclass_t dc, driver_t *driver)
  153: {
  154: 	driverlink_t dl;
  155: 	int i;
  156: 
  157: 	PDEBUG(("%s", DRIVERNAME(driver)));
  158: 
  159: 	dl = malloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO);
  160: 	if (!dl)
  161: 		return(ENOMEM);
  162: 
  163: 	/*
  164: 	 * Compile the driver's methods. Also increase the reference count
  165: 	 * so that the class doesn't get freed when the last instance
  166: 	 * goes. This means we can safely use static methods and avoids a
  167: 	 * double-free in devclass_delete_driver.
  168: 	 */
  169: 	kobj_class_instantiate(driver);
  170: 
  171: 	/*
  172: 	 * Make sure the devclass which the driver is implementing exists.
  173: 	 */
  174: 	devclass_find_internal(driver->name, TRUE);
  175: 
  176: 	dl->driver = driver;
  177: 	TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
  178: 
  179: 	/*
  180: 	 * Call BUS_DRIVER_ADDED for any existing busses in this class.
  181: 	 */
  182: 	for (i = 0; i < dc->maxunit; i++)
  183: 		if (dc->devices[i])
  184: 			BUS_DRIVER_ADDED(dc->devices[i], driver);
  185: 
  186: 	return(0);
  187: }
  188: 
  189: int
  190: devclass_delete_driver(devclass_t busclass, driver_t *driver)
  191: {
  192: 	devclass_t dc = devclass_find(driver->name);
  193: 	driverlink_t dl;
  194: 	device_t dev;
  195: 	int i;
  196: 	int error;
  197: 
  198: 	PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
  199: 
  200: 	if (!dc)
  201: 		return(0);
  202: 
  203: 	/*
  204: 	 * Find the link structure in the bus' list of drivers.
  205: 	 */
  206: 	TAILQ_FOREACH(dl, &busclass->drivers, link)
  207: 		if (dl->driver == driver)
  208: 			break;
  209: 
  210: 	if (!dl) {
  211: 		PDEBUG(("%s not found in %s list", driver->name, busclass->name));
  212: 		return(ENOENT);
  213: 	}
  214: 
  215: 	/*
  216: 	 * Disassociate from any devices.  We iterate through all the
  217: 	 * devices in the devclass of the driver and detach any which are
  218: 	 * using the driver and which have a parent in the devclass which
  219: 	 * we are deleting from.
  220: 	 *
  221: 	 * Note that since a driver can be in multiple devclasses, we
  222: 	 * should not detach devices which are not children of devices in
  223: 	 * the affected devclass.
  224: 	 */
  225: 	for (i = 0; i < dc->maxunit; i++)
  226: 		if (dc->devices[i]) {
  227: 			dev = dc->devices[i];
  228: 			if (dev->driver == driver && dev->parent &&
  229: 			    dev->parent->devclass == busclass) {
  230: 				if ((error = device_detach(dev)) != 0)
  231: 					return(error);
  232: 				device_set_driver(dev, NULL);
  233: 		    	}
  234: 		}
  235: 
  236: 	TAILQ_REMOVE(&busclass->drivers, dl, link);
  237: 	free(dl, M_BUS);
  238: 
  239: 	kobj_class_uninstantiate(driver);
  240: 
  241: 	return(0);
  242: }
  243: 
  244: static driverlink_t
  245: devclass_find_driver_internal(devclass_t dc, const char *classname)
  246: {
  247: 	driverlink_t dl;
  248: 
  249: 	PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
  250: 
  251: 	TAILQ_FOREACH(dl, &dc->drivers, link)
  252: 		if (!strcmp(dl->driver->name, classname))
  253: 			return(dl);
  254: 
  255: 	PDEBUG(("not found"));
  256: 	return(NULL);
  257: }
  258: 
  259: driver_t *
  260: devclass_find_driver(devclass_t dc, const char *classname)
  261: {
  262: 	driverlink_t dl;
  263: 
  264: 	dl = devclass_find_driver_internal(dc, classname);
  265: 	if (dl)
  266: 		return(dl->driver);
  267: 	else
  268: 		return(NULL);
  269: }
  270: 
  271: const char *
  272: devclass_get_name(devclass_t dc)
  273: {
  274: 	return(dc->name);
  275: }
  276: 
  277: device_t
  278: devclass_get_device(devclass_t dc, int unit)
  279: {
  280: 	if (dc == NULL || unit < 0 || unit >= dc->maxunit)
  281: 		return(NULL);
  282: 	return(dc->devices[unit]);
  283: }
  284: 
  285: void *
  286: devclass_get_softc(devclass_t dc, int unit)
  287: {
  288: 	device_t dev;
  289: 
  290: 	dev = devclass_get_device(dc, unit);
  291: 	if (!dev)
  292: 		return(NULL);
  293: 
  294: 	return(device_get_softc(dev));
  295: }
  296: 
  297: int
  298: devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
  299: {
  300: 	int i;
  301: 	int count;
  302: 	device_t *list;
  303:     
  304: 	count = 0;
  305: 	for (i = 0; i < dc->maxunit; i++)
  306: 		if (dc->devices[i])
  307: 			count++;
  308: 
  309: 	list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
  310: 	if (list == NULL)
  311: 		return(ENOMEM);
  312: 
  313: 	count = 0;
  314: 	for (i = 0; i < dc->maxunit; i++)
  315: 		if (dc->devices[i]) {
  316: 			list[count] = dc->devices[i];
  317: 			count++;
  318: 		}
  319: 
  320: 	*devlistp = list;
  321: 	*devcountp = count;
  322: 
  323: 	return(0);
  324: }
  325: 
  326: int
  327: devclass_get_maxunit(devclass_t dc)
  328: {
  329: 	return(dc->maxunit);
  330: }
  331: 
  332: static int
  333: devclass_alloc_unit(devclass_t dc, int *unitp)
  334: {
  335: 	int unit = *unitp;
  336: 
  337: 	PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
  338: 
  339: 	/* If we have been given a wired unit number, check for existing device */
  340: 	if (unit != -1) {
  341: 		if (unit >= 0 && unit < dc->maxunit &&
  342: 		    dc->devices[unit] != NULL) {
  343: 			if (bootverbose)
  344: 				printf("%s-: %s%d exists, using next available unit number\n",
  345: 				       dc->name, dc->name, unit);
  346: 			/* find the next available slot */
  347: 			while (++unit < dc->maxunit && dc->devices[unit] != NULL)
  348: 				;
  349: 		}
  350: 	} else {
  351: 		/* Unwired device, find the next available slot for it */
  352: 		unit = 0;
  353: 		while (unit < dc->maxunit && dc->devices[unit] != NULL)
  354: 			unit++;
  355: 	}
  356: 
  357: 	/*
  358: 	 * We've selected a unit beyond the length of the table, so let's
  359: 	 * extend the table to make room for all units up to and including
  360: 	 * this one.
  361: 	 */
  362: 	if (unit >= dc->maxunit) {
  363: 		device_t *newlist;
  364: 		int newsize;
  365: 
  366: 		newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t));
  367: 		newlist = malloc(sizeof(device_t) * newsize, M_BUS,
  368: 				 M_INTWAIT | M_ZERO);
  369: 		if (newlist == NULL)
  370: 			return(ENOMEM);
  371: 		bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
  372: 		if (dc->devices)
  373: 			free(dc->devices, M_BUS);
  374: 		dc->devices = newlist;
  375: 		dc->maxunit = newsize;
  376: 	}
  377: 	PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
  378: 
  379: 	*unitp = unit;
  380: 	return(0);
  381: }
  382: 
  383: static int
  384: devclass_add_device(devclass_t dc, device_t dev)
  385: {
  386: 	int buflen, error;
  387: 
  388: 	PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
  389: 
  390: 	buflen = strlen(dc->name) + 5;
  391: 	dev->nameunit = malloc(buflen, M_BUS, M_INTWAIT | M_ZERO);
  392: 	if (!dev->nameunit)
  393: 		return(ENOMEM);
  394: 
  395: 	if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
  396: 		free(dev->nameunit, M_BUS);
  397: 		dev->nameunit = NULL;
  398: 		return(error);
  399: 	}
  400: 	dc->devices[dev->unit] = dev;
  401: 	dev->devclass = dc;
  402: 	snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
  403: 
  404: #ifdef DEVICE_SYSCTLS
  405: 	device_register_oids(dev);
  406: #endif
  407: 
  408: 	return(0);
  409: }
  410: 
  411: static int
  412: devclass_delete_device(devclass_t dc, device_t dev)
  413: {
  414: 	if (!dc || !dev)
  415: 		return(0);
  416: 
  417: 	PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
  418: 
  419: 	if (dev->devclass != dc || dc->devices[dev->unit] != dev)
  420: 		panic("devclass_delete_device: inconsistent device class");
  421: 	dc->devices[dev->unit] = NULL;
  422: 	if (dev->flags & DF_WILDCARD)
  423: 		dev->unit = -1;
  424: 	dev->devclass = NULL;
  425: 	free(dev->nameunit, M_BUS);
  426: 	dev->nameunit = NULL;
  427: 
  428: #ifdef DEVICE_SYSCTLS
  429: 	device_unregister_oids(dev);
  430: #endif
  431: 
  432: 	return(0);
  433: }
  434: 
  435: static device_t
  436: make_device(device_t parent, const char *name, int unit)
  437: {
  438: 	device_t dev;
  439: 	devclass_t dc;
  440: 
  441: 	PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
  442: 
  443: 	if (name != NULL) {
  444: 		dc = devclass_find_internal(name, TRUE);
  445: 		if (!dc) {
  446: 			printf("make_device: can't find device class %s\n", name);
  447: 			return(NULL);
  448: 		}
  449: 	} else
  450: 		dc = NULL;
  451: 
  452: 	dev = malloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO);
  453: 	if (!dev)
  454: 		return(0);
  455: 
  456: 	dev->parent = parent;
  457: 	TAILQ_INIT(&dev->children);
  458: 	kobj_init((kobj_t) dev, &null_class);
  459: 	dev->driver = NULL;
  460: 	dev->devclass = NULL;
  461: 	dev->unit = unit;
  462: 	dev->nameunit = NULL;
  463: 	dev->desc = NULL;
  464: 	dev->busy = 0;
  465: 	dev->devflags = 0;
  466: 	dev->flags = DF_ENABLED;
  467: 	dev->order = 0;
  468: 	if (unit == -1)
  469: 		dev->flags |= DF_WILDCARD;
  470: 	if (name) {
  471: 		dev->flags |= DF_FIXEDCLASS;
  472: 		if (devclass_add_device(dc, dev) != 0) {
  473: 			kobj_delete((kobj_t)dev, M_BUS);
  474: 			return(NULL);
  475: 		}
  476:     	}
  477: 	dev->ivars = NULL;
  478: 	dev->softc = NULL;
  479: 
  480: 	dev->state = DS_NOTPRESENT;
  481: 
  482: 	return(dev);
  483: }
  484: 
  485: static int
  486: device_print_child(device_t dev, device_t child)
  487: {
  488: 	int retval = 0;
  489: 
  490: 	if (device_is_alive(child))
  491: 		retval += BUS_PRINT_CHILD(dev, child);
  492: 	else
  493: 		retval += device_printf(child, " not found\n");
  494: 
  495: 	return(retval);
  496: }
  497: 
  498: device_t
  499: device_add_child(device_t dev, const char *name, int unit)
  500: {
  501: 	return device_add_child_ordered(dev, 0, name, unit);
  502: }
  503: 
  504: device_t
  505: device_add_child_ordered(device_t dev, int order, const char *name, int unit)
  506: {
  507: 	device_t child;
  508: 	device_t place;
  509: 
  510: 	PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev),
  511: 		order, unit));
  512: 
  513: 	child = make_device(dev, name, unit);
  514: 	if (child == NULL)
  515: 		return child;
  516: 	child->order = order;
  517: 
  518: 	TAILQ_FOREACH(place, &dev->children, link)
  519: 		if (place->order > order)
  520: 			break;
  521: 
  522: 	if (place) {
  523: 		/*
  524: 		 * The device 'place' is the first device whose order is
  525: 		 * greater than the new child.
  526: 		 */
  527: 		TAILQ_INSERT_BEFORE(place, child, link);
  528: 	} else {
  529: 		/*
  530: 		 * The new child's order is greater or equal to the order of
  531: 		 * any existing device. Add the child to the tail of the list.
  532: 		 */
  533: 		TAILQ_INSERT_TAIL(&dev->children, child, link);
  534:     	}
  535: 
  536: 	return(child);
  537: }
  538: 
  539: int
  540: device_delete_child(device_t dev, device_t child)
  541: {
  542: 	int error;
  543: 	device_t grandchild;
  544: 
  545: 	PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
  546: 
  547: 	/* remove children first */
  548: 	while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
  549:         	error = device_delete_child(child, grandchild);
  550: 		if (error)
  551: 			return(error);
  552: 	}
  553: 
  554: 	if ((error = device_detach(child)) != 0)
  555: 		return(error);
  556: 	if (child->devclass)
  557: 		devclass_delete_device(child->devclass, child);
  558: 	TAILQ_REMOVE(&dev->children, child, link);
  559: 	device_set_desc(child, NULL);
  560: 	kobj_delete((kobj_t)child, M_BUS);
  561: 
  562: 	return(0);
  563: }
  564: 
  565: /*
  566:  * Find only devices attached to this bus.
  567:  */
  568: device_t
  569: device_find_child(device_t dev, const char *classname, int unit)
  570: {
  571: 	devclass_t dc;
  572: 	device_t child;
  573: 
  574: 	dc = devclass_find(classname);
  575: 	if (!dc)
  576: 		return(NULL);
  577: 
  578: 	child = devclass_get_device(dc, unit);
  579: 	if (child && child->parent == dev)
  580: 		return(child);
  581: 	return(NULL);
  582: }
  583: 
  584: static driverlink_t
  585: first_matching_driver(devclass_t dc, device_t dev)
  586: {
  587: 	if (dev->devclass)
  588: 		return(devclass_find_driver_internal(dc, dev->devclass->name));
  589: 	else
  590: 		return(TAILQ_FIRST(&dc->drivers));
  591: }
  592: 
  593: static driverlink_t
  594: next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
  595: {
  596: 	if (dev->devclass) {
  597: 		driverlink_t dl;
  598: 		for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
  599: 			if (!strcmp(dev->devclass->name, dl->driver->name))
  600: 				return(dl);
  601: 		return(NULL);
  602: 	} else
  603: 		return(TAILQ_NEXT(last, link));
  604: }
  605: 
  606: static int
  607: device_probe_child(device_t dev, device_t child)
  608: {
  609: 	devclass_t dc;
  610: 	driverlink_t best = 0;
  611: 	driverlink_t dl;
  612: 	int result, pri = 0;
  613: 	int hasclass = (child->devclass != 0);
  614: 
  615: 	dc = dev->devclass;
  616: 	if (!dc)
  617: 		panic("device_probe_child: parent device has no devclass");
  618: 
  619: 	if (child->state == DS_ALIVE)
  620: 		return(0);
  621: 
  622: 	for (dl = first_matching_driver(dc, child); dl;
  623: 	     dl = next_matching_driver(dc, child, dl)) {
  624: 		PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
  625: 		device_set_driver(child, dl->driver);
  626: 		if (!hasclass)
  627: 			device_set_devclass(child, dl->driver->name);
  628: 		result = DEVICE_PROBE(child);
  629: 		if (!hasclass)
  630: 			device_set_devclass(child, 0);
  631: 
  632: 		/*
  633: 		 * If the driver returns SUCCESS, there can be no higher match
  634: 		 * for this device.
  635: 		 */
  636: 		if (result == 0) {
  637: 			best = dl;
  638: 			pri = 0;
  639: 			break;
  640: 		}
  641: 
  642: 		/*
  643: 		 * The driver returned an error so it certainly doesn't match.
  644: 		 */
  645: 		if (result > 0) {
  646: 			device_set_driver(child, 0);
  647: 			continue;
  648: 		}
  649: 
  650: 		/*
  651: 		 * A priority lower than SUCCESS, remember the best matching
  652: 		 * driver. Initialise the value of pri for the first match.
  653: 		 */
  654: 		if (best == 0 || result > pri) {
  655: 			best = dl;
  656: 			pri = result;
  657: 			continue;
  658: 		}
  659: 	}
  660: 
  661: 	/*
  662: 	 * If we found a driver, change state and initialise the devclass.
  663: 	 */
  664: 	if (best) {
  665: 		if (!child->devclass)
  666: 			device_set_devclass(child, best->driver->name);
  667: 		device_set_driver(child, best->driver);
  668: 		if (pri < 0) {
  669: 			/*
  670: 			 * A bit bogus. Call the probe method again to make
  671: 			 * sure that we have the right description.
  672: 			 */
  673: 			DEVICE_PROBE(child);
  674: 		}
  675: 		child->state = DS_ALIVE;
  676: 		return(0);
  677: 	}
  678: 
  679: 	return(ENXIO);
  680: }
  681: 
  682: device_t
  683: device_get_parent(device_t dev)
  684: {
  685: 	return dev->parent;
  686: }
  687: 
  688: int
  689: device_get_children(device_t dev, device_t **devlistp, int *devcountp)
  690: {
  691: 	int count;
  692: 	device_t child;
  693: 	device_t *list;
  694:     
  695: 	count = 0;
  696: 	TAILQ_FOREACH(child, &dev->children, link)
  697: 		count++;
  698: 
  699: 	list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
  700: 	if (!list)
  701: 		return(ENOMEM);
  702: 
  703: 	count = 0;
  704: 	TAILQ_FOREACH(child, &dev->children, link) {
  705: 		list[count] = child;
  706: 		count++;
  707: 	}
  708: 
  709: 	*devlistp = list;
  710: 	*devcountp = count;
  711: 
  712: 	return(0);
  713: }
  714: 
  715: driver_t *
  716: device_get_driver(device_t dev)
  717: {
  718: 	return(dev->driver);
  719: }
  720: 
  721: devclass_t
  722: device_get_devclass(device_t dev)
  723: {
  724: 	return(dev->devclass);
  725: }
  726: 
  727: const char *
  728: device_get_name(device_t dev)
  729: {
  730: 	if (dev->devclass)
  731: 		return devclass_get_name(dev->devclass);
  732: 	return(NULL);
  733: }
  734: 
  735: const char *
  736: device_get_nameunit(device_t dev)
  737: {
  738: 	return(dev->nameunit);
  739: }
  740: 
  741: int
  742: device_get_unit(device_t dev)
  743: {
  744: 	return(dev->unit);
  745: }
  746: 
  747: const char *
  748: device_get_desc(device_t dev)
  749: {
  750: 	return(dev->desc);
  751: }
  752: 
  753: uint32_t
  754: device_get_flags(device_t dev)
  755: {
  756: 	return(dev->devflags);
  757: }
  758: 
  759: int
  760: device_print_prettyname(device_t dev)
  761: {
  762: 	const char *name = device_get_name(dev);
  763: 
  764: 	if (name == 0)
  765: 		return printf("unknown: ");
  766: 	else
  767: 		return printf("%s%d: ", name, device_get_unit(dev));
  768: }
  769: 
  770: int
  771: device_printf(device_t dev, const char * fmt, ...)
  772: {
  773: 	__va_list ap;
  774: 	int retval;
  775: 
  776: 	retval = device_print_prettyname(dev);
  777: 	__va_start(ap, fmt);
  778: 	retval += vprintf(fmt, ap);
  779: 	__va_end(ap);
  780: 	return retval;
  781: }
  782: 
  783: static void
  784: device_set_desc_internal(device_t dev, const char* desc, int copy)
  785: {
  786: 	if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
  787: 		free(dev->desc, M_BUS);
  788: 		dev->flags &= ~DF_DESCMALLOCED;
  789: 		dev->desc = NULL;
  790: 	}
  791: 
  792: 	if (copy && desc) {
  793: 		dev->desc = malloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
  794: 		if (dev->desc) {
  795: 			strcpy(dev->desc, desc);
  796: 			dev->flags |= DF_DESCMALLOCED;
  797: 		}
  798: 	} else
  799: 		/* Avoid a -Wcast-qual warning */
  800: 		dev->desc = (char *)(uintptr_t) desc;
  801: 
  802: #ifdef DEVICE_SYSCTLS
  803: 	{
  804: 		struct sysctl_oid *oid = &dev->oid[1];
  805: 		oid->oid_arg1 = dev->desc ? dev->desc : "";
  806: 		oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
  807: 	}
  808: #endif
  809: }
  810: 
  811: void
  812: device_set_desc(device_t dev, const char* desc)
  813: {
  814: 	device_set_desc_internal(dev, desc, FALSE);
  815: }
  816: 
  817: void
  818: device_set_desc_copy(device_t dev, const char* desc)
  819: {
  820: 	device_set_desc_internal(dev, desc, TRUE);
  821: }
  822: 
  823: void
  824: device_set_flags(device_t dev, uint32_t flags)
  825: {
  826: 	dev->devflags = flags;
  827: }
  828: 
  829: void *
  830: device_get_softc(device_t dev)
  831: {
  832: 	return dev->softc;
  833: }
  834: 
  835: void
  836: device_set_softc(device_t dev, void *softc)
  837: {
  838: 	if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
  839: 		free(dev->softc, M_BUS);
  840: 	dev->softc = softc;
  841: 	if (dev->softc)
  842: 		dev->flags |= DF_EXTERNALSOFTC;
  843: 	else
  844: 		dev->flags &= ~DF_EXTERNALSOFTC;
  845: }
  846: 
  847: void *
  848: device_get_ivars(device_t dev)
  849: {
  850: 	return dev->ivars;
  851: }
  852: 
  853: void
  854: device_set_ivars(device_t dev, void * ivars)
  855: {
  856: 	if (!dev)
  857: 		return;
  858: 
  859: 	dev->ivars = ivars;
  860: }
  861: 
  862: device_state_t
  863: device_get_state(device_t dev)
  864: {
  865: 	return(dev->state);
  866: }
  867: 
  868: void
  869: device_enable(device_t dev)
  870: {
  871: 	dev->flags |= DF_ENABLED;
  872: }
  873: 
  874: void
  875: device_disable(device_t dev)
  876: {
  877: 	dev->flags &= ~DF_ENABLED;
  878: }
  879: 
  880: /*
  881:  * YYY cannot block
  882:  */
  883: void
  884: device_busy(device_t dev)
  885: {
  886: 	if (dev->state < DS_ATTACHED)
  887: 		panic("device_busy: called for unattached device");
  888: 	if (dev->busy == 0 && dev->parent)
  889: 		device_busy(dev->parent);
  890: 	dev->busy++;
  891: 	dev->state = DS_BUSY;
  892: }
  893: 
  894: /*
  895:  * YYY cannot block
  896:  */
  897: void
  898: device_unbusy(device_t dev)
  899: {
  900: 	if (dev->state != DS_BUSY)
  901: 		panic("device_unbusy: called for non-busy device");
  902: 	dev->busy--;
  903: 	if (dev->busy == 0) {
  904: 		if (dev->parent)
  905: 			device_unbusy(dev->parent);
  906: 		dev->state = DS_ATTACHED;
  907: 	}
  908: }
  909: 
  910: void
  911: device_quiet(device_t dev)
  912: {
  913: 	dev->flags |= DF_QUIET;
  914: }
  915: 
  916: void
  917: device_verbose(device_t dev)
  918: {
  919: 	dev->flags &= ~DF_QUIET;
  920: }
  921: 
  922: int
  923: device_is_quiet(device_t dev)
  924: {
  925: 	return((dev->flags & DF_QUIET) != 0);
  926: }
  927: 
  928: int
  929: device_is_enabled(device_t dev)
  930: {
  931: 	return((dev->flags & DF_ENABLED) != 0);
  932: }
  933: 
  934: int
  935: device_is_alive(device_t dev)
  936: {
  937: 	return(dev->state >= DS_ALIVE);
  938: }
  939: 
  940: int
  941: device_is_attached(device_t dev)
  942: {
  943: 	return(dev->state >= DS_ATTACHED);
  944: }
  945: 
  946: int
  947: device_set_devclass(device_t dev, const char *classname)
  948: {
  949: 	devclass_t dc;
  950: 
  951: 	if (!classname) {
  952: 		if (dev->devclass)
  953: 			devclass_delete_device(dev->devclass, dev);
  954: 		return(0);
  955: 	}
  956: 
  957: 	if (dev->devclass) {
  958: 		printf("device_set_devclass: device class already set\n");
  959: 		return(EINVAL);
  960: 	}
  961: 
  962: 	dc = devclass_find_internal(classname, TRUE);
  963: 	if (!dc)
  964: 		return(ENOMEM);
  965: 
  966: 	return(devclass_add_device(dc, dev));
  967: }
  968: 
  969: int
  970: device_set_driver(device_t dev, driver_t *driver)
  971: {
  972: 	if (dev->state >= DS_ATTACHED)
  973: 		return(EBUSY);
  974: 
  975: 	if (dev->driver == driver)
  976: 		return(0);
  977: 
  978: 	if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
  979: 		free(dev->softc, M_BUS);
  980: 		dev->softc = NULL;
  981: 	}
  982: 	kobj_delete((kobj_t) dev, 0);
  983: 	dev->driver = driver;
  984: 	if (driver) {
  985: 		kobj_init((kobj_t) dev, (kobj_class_t) driver);
  986: 		if (!(dev->flags & DF_EXTERNALSOFTC)) {
  987: 			dev->softc = malloc(driver->size, M_BUS,
  988: 					    M_INTWAIT | M_ZERO);
  989: 			if (!dev->softc) {
  990: 				kobj_delete((kobj_t)dev, 0);
  991: 				kobj_init((kobj_t) dev, &null_class);
  992: 				dev->driver = NULL;
  993: 				return(ENOMEM);
  994: 	    		}
  995: 		}
  996: 	} else
  997: 		kobj_init((kobj_t) dev, &null_class);
  998: 	return(0);
  999: }
 1000: 
 1001: int
 1002: device_probe_and_attach(device_t dev)
 1003: {
 1004: 	device_t bus = dev->parent;
 1005: 	int error = 0;
 1006: 	int hasclass = (dev->devclass != 0);
 1007: 
 1008: 	if (dev->state >= DS_ALIVE)
 1009: 		return(0);
 1010: 
 1011: 	if ((dev->flags & DF_ENABLED) == 0) {
 1012: 		if (bootverbose) {
 1013: 			device_print_prettyname(dev);
 1014: 			printf("not probed (disabled)\n");
 1015: 		}
 1016: 		return(0);
 1017: 	}
 1018: 
 1019: 	error = device_probe_child(bus, dev);
 1020: 	if (error) {
 1021: 		if (!(dev->flags & DF_DONENOMATCH)) {
 1022: 			BUS_PROBE_NOMATCH(bus, dev);
 1023: 			dev->flags |= DF_DONENOMATCH;
 1024: 		}
 1025: 		return(error);
 1026: 	}
 1027: 	
 1028: 	if (!device_is_quiet(dev))
 1029: 		device_print_child(bus, dev);
 1030: 	error = DEVICE_ATTACH(dev);
 1031: 	if (!error)
 1032: 		dev->state = DS_ATTACHED;
 1033: 	else {
 1034: 		printf("device_probe_and_attach: %s%d attach returned %d\n",
 1035: 		       dev->driver->name, dev->unit, error);
 1036: 		/* Unset the class that was set in device_probe_child */
 1037: 		if (!hasclass)
 1038: 			device_set_devclass(dev, 0);
 1039: 		device_set_driver(dev, NULL);
 1040: 		dev->state = DS_NOTPRESENT;
 1041: 	}
 1042: 
 1043: 	return(error);
 1044: }
 1045: 
 1046: int
 1047: device_detach(device_t dev)
 1048: {
 1049: 	int error;
 1050: 
 1051: 	PDEBUG(("%s", DEVICENAME(dev)));
 1052: 	if (dev->state == DS_BUSY)
 1053: 		return(EBUSY);
 1054: 	if (dev->state != DS_ATTACHED)
 1055: 		return(0);
 1056: 
 1057: 	if ((error = DEVICE_DETACH(dev)) != 0)
 1058: 		return(error);
 1059: 	device_printf(dev, "detached\n");
 1060: 	if (dev->parent)
 1061: 		BUS_CHILD_DETACHED(dev->parent, dev);
 1062: 
 1063: 	if (!(dev->flags & DF_FIXEDCLASS))
 1064: 		devclass_delete_device(dev->devclass, dev);
 1065: 
 1066: 	dev->state = DS_NOTPRESENT;
 1067: 	device_set_driver(dev, NULL);
 1068: 
 1069: 	return(0);
 1070: }
 1071: 
 1072: int
 1073: device_shutdown(device_t dev)
 1074: {
 1075: 	if (dev->state < DS_ATTACHED)
 1076: 		return 0;
 1077: 	return DEVICE_SHUTDOWN(dev);
 1078: }
 1079: 
 1080: int
 1081: device_set_unit(device_t dev, int unit)
 1082: {
 1083: 	devclass_t dc;
 1084: 	int err;
 1085: 
 1086: 	dc = device_get_devclass(dev);
 1087: 	if (unit < dc->maxunit && dc->devices[unit])
 1088: 		return(EBUSY);
 1089: 	err = devclass_delete_device(dc, dev);
 1090: 	if (err)
 1091: 		return(err);
 1092: 	dev->unit = unit;
 1093: 	err = devclass_add_device(dc, dev);
 1094: 	return(err);
 1095: }
 1096: 
 1097: #ifdef DEVICE_SYSCTLS
 1098: 
 1099: /*
 1100:  * Sysctl nodes for devices.
 1101:  */
 1102: 
 1103: SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices");
 1104: 
 1105: static int
 1106: sysctl_handle_children(SYSCTL_HANDLER_ARGS)
 1107: {
 1108: 	device_t dev = arg1;
 1109: 	device_t child;
 1110: 	int first = 1, error = 0;
 1111: 
 1112: 	TAILQ_FOREACH(child, &dev->children, link)
 1113: 		if (child->nameunit) {
 1114: 			if (!first) {
 1115: 				error = SYSCTL_OUT(req, ",", 1);
 1116: 				if (error)
 1117: 					return error;
 1118: 			} else
 1119: 				first = 0;
 1120: 			error = SYSCTL_OUT(req, child->nameunit,
 1121: 					   strlen(child->nameunit));
 1122: 			if (error)
 1123: 				return(error);
 1124: 		}
 1125: 
 1126: 	error = SYSCTL_OUT(req, "", 1);
 1127: 
 1128: 	return(error);
 1129: }
 1130: 
 1131: static int
 1132: sysctl_handle_state(SYSCTL_HANDLER_ARGS)
 1133: {
 1134: 	device_t dev = arg1;
 1135: 
 1136: 	switch (dev->state) {
 1137: 	case DS_NOTPRESENT:
 1138: 		return SYSCTL_OUT(req, "notpresent", sizeof("notpresent"));
 1139: 	case DS_ALIVE:
 1140: 		return SYSCTL_OUT(req, "alive", sizeof("alive"));
 1141: 	case DS_ATTACHED:
 1142: 		return SYSCTL_OUT(req, "attached", sizeof("attached"));
 1143: 	case DS_BUSY:
 1144: 		return SYSCTL_OUT(req, "busy", sizeof("busy"));
 1145: 	default:
 1146: 		return (0);
 1147: 	}
 1148: }
 1149: 
 1150: static void
 1151: device_register_oids(device_t dev)
 1152: {
 1153: 	struct sysctl_oid* oid;
 1154: 
 1155: 	oid = &dev->oid[0];
 1156: 	bzero(oid, sizeof(*oid));
 1157: 	oid->oid_parent = &sysctl__hw_devices_children;
 1158: 	oid->oid_number = OID_AUTO;
 1159: 	oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW;
 1160: 	oid->oid_arg1 = &dev->oidlist[0];
 1161: 	oid->oid_arg2 = 0;
 1162: 	oid->oid_name = dev->nameunit;
 1163: 	oid->oid_handler = 0;
 1164: 	oid->oid_fmt = "N";
 1165: 	SLIST_INIT(&dev->oidlist[0]);
 1166: 	sysctl_register_oid(oid);
 1167: 
 1168: 	oid = &dev->oid[1];
 1169: 	bzero(oid, sizeof(*oid));
 1170: 	oid->oid_parent = &dev->oidlist[0];
 1171: 	oid->oid_number = OID_AUTO;
 1172: 	oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD;
 1173: 	oid->oid_arg1 = dev->desc ? dev->desc : "";
 1174: 	oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
 1175: 	oid->oid_name = "desc";
 1176: 	oid->oid_handler = sysctl_handle_string;
 1177: 	oid->oid_fmt = "A";
 1178: 	sysctl_register_oid(oid);
 1179: 
 1180: 	oid = &dev->oid[2];
 1181: 	bzero(oid, sizeof(*oid));
 1182: 	oid->oid_parent = &dev->oidlist[0];
 1183: 	oid->oid_number = OID_AUTO;
 1184: 	oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
 1185: 	oid->oid_arg1 = dev;
 1186: 	oid->oid_arg2 = 0;
 1187: 	oid->oid_name = "children";
 1188: 	oid->oid_handler = sysctl_handle_children;
 1189: 	oid->oid_fmt = "A";
 1190: 	sysctl_register_oid(oid);
 1191: 
 1192: 	oid = &dev->oid[3];
 1193: 	bzero(oid, sizeof(*oid));
 1194: 	oid->oid_parent = &dev->oidlist[0];
 1195: 	oid->oid_number = OID_AUTO;
 1196: 	oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
 1197: 	oid->oid_arg1 = dev;
 1198: 	oid->oid_arg2 = 0;
 1199: 	oid->oid_name = "state";
 1200: 	oid->oid_handler = sysctl_handle_state;
 1201: 	oid->oid_fmt = "A";
 1202: 	sysctl_register_oid(oid);
 1203: }
 1204: 
 1205: static void
 1206: device_unregister_oids(device_t dev)
 1207: {
 1208: 	sysctl_unregister_oid(&dev->oid[0]);
 1209: 	sysctl_unregister_oid(&dev->oid[1]);
 1210: 	sysctl_unregister_oid(&dev->oid[2]);
 1211: }
 1212: 
 1213: #endif
 1214: 
 1215: /*======================================*/
 1216: /*
 1217:  * Access functions for device resources.
 1218:  */
 1219: 
 1220: /* Supplied by config(8) in ioconf.c */
 1221: extern struct config_device config_devtab[];
 1222: extern int devtab_count;
 1223: 
 1224: /* Runtime version */
 1225: struct config_device *devtab = config_devtab;
 1226: 
 1227: static int
 1228: resource_new_name(const char *name, int unit)
 1229: {
 1230: 	struct config_device *new;
 1231: 
 1232: 	new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP,
 1233: 		     M_INTWAIT | M_ZERO);
 1234: 	if (new == NULL)
 1235: 		return(-1);
 1236: 	if (devtab && devtab_count > 0)
 1237: 		bcopy(devtab, new, devtab_count * sizeof(*new));
 1238: 	new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
 1239: 	if (new[devtab_count].name == NULL) {
 1240: 		free(new, M_TEMP);
 1241: 		return(-1);
 1242: 	}
 1243: 	strcpy(new[devtab_count].name, name);
 1244: 	new[devtab_count].unit = unit;
 1245: 	new[devtab_count].resource_count = 0;
 1246: 	new[devtab_count].resources = NULL;
 1247: 	devtab = new;
 1248: 	return devtab_count++;
 1249: }
 1250: 
 1251: static int
 1252: resource_new_resname(int j, const char *resname, resource_type type)
 1253: {
 1254: 	struct config_resource *new;
 1255: 	int i;
 1256: 
 1257: 	i = devtab[j].resource_count;
 1258: 	new = malloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
 1259: 	if (new == NULL)
 1260: 		return(-1);
 1261: 	if (devtab[j].resources && i > 0)
 1262: 		bcopy(devtab[j].resources, new, i * sizeof(*new));
 1263: 	new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
 1264: 	if (new[i].name == NULL) {
 1265: 		free(new, M_TEMP);
 1266: 		return(-1);
 1267: 	}
 1268: 	strcpy(new[i].name, resname);
 1269: 	new[i].type = type;
 1270: 	if (devtab[j].resources)
 1271: 		free(devtab[j].resources, M_TEMP);
 1272: 	devtab[j].resources = new;
 1273: 	devtab[j].resource_count = i + 1;
 1274: 	return(i);
 1275: }
 1276: 
 1277: static int
 1278: resource_match_string(int i, const char *resname, const char *value)
 1279: {
 1280: 	int j;
 1281: 	struct config_resource *res;
 1282: 
 1283: 	for (j = 0, res = devtab[i].resources;
 1284: 	     j < devtab[i].resource_count; j++, res++)
 1285: 		if (!strcmp(res->name, resname)
 1286: 		    && res->type == RES_STRING
 1287: 		    && !strcmp(res->u.stringval, value))
 1288: 			return(j);
 1289: 	return(-1);
 1290: }
 1291: 
 1292: static int
 1293: resource_find(const char *name, int unit, const char *resname, 
 1294: 	      struct config_resource **result)
 1295: {
 1296: 	int i, j;
 1297: 	struct config_resource *res;
 1298: 
 1299: 	/*
 1300: 	 * First check specific instances, then generic.
 1301: 	 */
 1302: 	for (i = 0; i < devtab_count; i++) {
 1303: 		if (devtab[i].unit < 0)
 1304: 			continue;
 1305: 		if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
 1306: 			res = devtab[i].resources;
 1307: 			for (j = 0; j < devtab[i].resource_count; j++, res++)
 1308: 				if (!strcmp(res->name, resname)) {
 1309: 					*result = res;
 1310: 					return(0);
 1311: 				}
 1312: 		}
 1313: 	}
 1314: 	for (i = 0; i < devtab_count; i++) {
 1315: 		if (devtab[i].unit >= 0)
 1316: 			continue;
 1317: 		/* XXX should this `&& devtab[i].unit == unit' be here? */
 1318: 		/* XXX if so, then the generic match does nothing */
 1319: 		if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
 1320: 			res = devtab[i].resources;
 1321: 			for (j = 0; j < devtab[i].resource_count; j++, res++)
 1322: 				if (!strcmp(res->name, resname)) {
 1323: 					*result = res;
 1324: 					return(0);
 1325: 				}
 1326: 		}
 1327: 	}
 1328: 	return(ENOENT);
 1329: }
 1330: 
 1331: int
 1332: resource_int_value(const char *name, int unit, const char *resname, int *result)
 1333: {
 1334: 	int error;
 1335: 	struct config_resource *res;
 1336: 
 1337: 	if ((error = resource_find(name, unit, resname, &res)) != 0)
 1338: 		return(error);
 1339: 	if (res->type != RES_INT)
 1340: 		return(EFTYPE);
 1341: 	*result = res->u.intval;
 1342: 	return(0);
 1343: }
 1344: 
 1345: int
 1346: resource_long_value(const char *name, int unit, const char *resname,
 1347: 		    long *result)
 1348: {
 1349: 	int error;
 1350: 	struct config_resource *res;
 1351: 
 1352: 	if ((error = resource_find(name, unit, resname, &res)) != 0)
 1353: 		return(error);
 1354: 	if (res->type != RES_LONG)
 1355: 		return(EFTYPE);
 1356: 	*result = res->u.longval;
 1357: 	return(0);
 1358: }
 1359: 
 1360: int
 1361: resource_string_value(const char *name, int unit, const char *resname,
 1362: 		      char **result)
 1363: {
 1364: 	int error;
 1365: 	struct config_resource *res;
 1366: 
 1367: 	if ((error = resource_find(name, unit, resname, &res)) != 0)
 1368: 		return(error);
 1369: 	if (res->type != RES_STRING)
 1370: 		return(EFTYPE);
 1371: 	*result = res->u.stringval;
 1372: 	return(0);
 1373: }
 1374: 
 1375: int
 1376: resource_query_string(int i, const char *resname, const char *value)
 1377: {
 1378: 	if (i < 0)
 1379: 		i = 0;
 1380: 	else
 1381: 		i = i + 1;
 1382: 	for (; i < devtab_count; i++)
 1383: 		if (resource_match_string(i, resname, value) >= 0)
 1384: 			return(i);
 1385: 	return(-1);
 1386: }
 1387: 
 1388: int
 1389: resource_locate(int i, const char *resname)
 1390: {
 1391: 	if (i < 0)
 1392: 		i = 0;
 1393: 	else
 1394: 		i = i + 1;
 1395: 	for (; i < devtab_count; i++)
 1396: 		if (!strcmp(devtab[i].name, resname))
 1397: 			return(i);
 1398: 	return(-1);
 1399: }
 1400: 
 1401: int
 1402: resource_count(void)
 1403: {
 1404: 	return(devtab_count);
 1405: }
 1406: 
 1407: char *
 1408: resource_query_name(int i)
 1409: {
 1410: 	return(devtab[i].name);
 1411: }
 1412: 
 1413: int
 1414: resource_query_unit(int i)
 1415: {
 1416: 	return(devtab[i].unit);
 1417: }
 1418: 
 1419: static int
 1420: resource_create(const char *name, int unit, const char *resname,
 1421: 		resource_type type, struct config_resource **result)
 1422: {
 1423: 	int i, j;
 1424: 	struct config_resource *res = NULL;
 1425: 
 1426: 	for (i = 0; i < devtab_count; i++)
 1427: 		if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
 1428: 			res = devtab[i].resources;
 1429: 			break;
 1430: 		}
 1431: 	if (res == NULL) {
 1432: 		i = resource_new_name(name, unit);
 1433: 		if (i < 0)
 1434: 			return(ENOMEM);
 1435: 		res = devtab[i].resources;
 1436: 	}
 1437: 	for (j = 0; j < devtab[i].resource_count; j++, res++)
 1438: 		if (!strcmp(res->name, resname)) {
 1439: 			*result = res;
 1440: 			return(0);
 1441: 		}
 1442: 	j = resource_new_resname(i, resname, type);
 1443: 	if (j < 0)
 1444: 		return(ENOMEM);
 1445: 	res = &devtab[i].resources[j];
 1446: 	*result = res;
 1447: 	return(0);
 1448: }
 1449: 
 1450: int
 1451: resource_set_int(const char *name, int unit, const char *resname, int value)
 1452: {
 1453: 	int error;
 1454: 	struct config_resource *res;
 1455: 
 1456: 	error = resource_create(name, unit, resname, RES_INT, &res);
 1457: 	if (error)
 1458: 		return(error);
 1459: 	if (res->type != RES_INT)
 1460: 		return(EFTYPE);
 1461: 	res->u.intval = value;
 1462: 	return(0);
 1463: }
 1464: 
 1465: int
 1466: resource_set_long(const char *name, int unit, const char *resname, long value)
 1467: {
 1468: 	int error;
 1469: 	struct config_resource *res;
 1470: 
 1471: 	error = resource_create(name, unit, resname, RES_LONG, &res);
 1472: 	if (error)
 1473: 		return(error);
 1474: 	if (res->type != RES_LONG)
 1475: 		return(EFTYPE);
 1476: 	res->u.longval = value;
 1477: 	return(0);
 1478: }
 1479: 
 1480: int
 1481: resource_set_string(const char *name, int unit, const char *resname,
 1482: 		    const char *value)
 1483: {
 1484: 	int error;
 1485: 	struct config_resource *res;
 1486: 
 1487: 	error = resource_create(name, unit, resname, RES_STRING, &res);
 1488: 	if (error)
 1489: 		return(error);
 1490: 	if (res->type != RES_STRING)
 1491: 		return(EFTYPE);
 1492: 	if (res->u.stringval)
 1493: 		free(res->u.stringval, M_TEMP);
 1494: 	res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
 1495: 	if (res->u.stringval == NULL)
 1496: 		return(ENOMEM);
 1497: 	strcpy(res->u.stringval, value);
 1498: 	return(0);
 1499: }
 1500: 
 1501: static void
 1502: resource_cfgload(void *dummy __unused)
 1503: {
 1504: 	struct config_resource *res, *cfgres;
 1505: 	int i, j;
 1506: 	int error;
 1507: 	char *name, *resname;
 1508: 	int unit;
 1509: 	resource_type type;
 1510: 	char *stringval;
 1511: 	int config_devtab_count;
 1512: 
 1513: 	config_devtab_count = devtab_count;
 1514: 	devtab = NULL;
 1515: 	devtab_count = 0;
 1516: 
 1517: 	for (i = 0; i < config_devtab_count; i++) {
 1518: 		name = config_devtab[i].name;
 1519: 		unit = config_devtab[i].unit;
 1520: 
 1521: 		for (j = 0; j < config_devtab[i].resource_count; j++) {
 1522: 			cfgres = config_devtab[i].resources;
 1523: 			resname = cfgres[j].name;
 1524: 			type = cfgres[j].type;
 1525: 			error = resource_create(name, unit, resname, type,
 1526: 						&res);
 1527: 			if (error) {
 1528: 				printf("create resource %s%d: error %d\n",
 1529: 					name, unit, error);
 1530: 				continue;
 1531: 			}
 1532: 			if (res->type != type) {
 1533: 				printf("type mismatch %s%d: %d != %d\n",
 1534: 					name, unit, res->type, type);
 1535: 				continue;
 1536: 			}
 1537: 			switch (type) {
 1538: 			case RES_INT:
 1539: 				res->u.intval = cfgres[j].u.intval;
 1540: 				break;
 1541: 			case RES_LONG:
 1542: 				res->u.longval = cfgres[j].u.longval;
 1543: 				break;
 1544: 			case RES_STRING:
 1545: 				if (res->u.stringval)
 1546: 					free(res->u.stringval, M_TEMP);
 1547: 				stringval = cfgres[j].u.stringval;
 1548: 				res->u.stringval = malloc(strlen(stringval) + 1,
 1549: 							  M_TEMP, M_INTWAIT);
 1550: 				if (res->u.stringval == NULL)
 1551: 					break;
 1552: 				strcpy(res->u.stringval, stringval);
 1553: 				break;
 1554: 			default:
 1555: 				panic("unknown resource type %d\n", type);
 1556: 			}
 1557: 		}
 1558: 	}
 1559: }
 1560: SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0)
 1561: 
 1562: 
 1563: /*======================================*/
 1564: /*
 1565:  * Some useful method implementations to make life easier for bus drivers.
 1566:  */
 1567: 
 1568: void
 1569: resource_list_init(struct resource_list *rl)
 1570: {
 1571: 	SLIST_INIT(rl);
 1572: }
 1573: 
 1574: void
 1575: resource_list_free(struct resource_list *rl)
 1576: {
 1577: 	struct resource_list_entry *rle;
 1578: 
 1579: 	while ((rle = SLIST_FIRST(rl)) != NULL) {
 1580: 		if (rle->res)
 1581: 			panic("resource_list_free: resource entry is busy");
 1582: 		SLIST_REMOVE_HEAD(rl, link);
 1583: 		free(rle, M_BUS);
 1584: 	}
 1585: }
 1586: 
 1587: void
 1588: resource_list_add(struct resource_list *rl,
 1589: 		  int type, int rid,
 1590: 		  u_long start, u_long end, u_long count)
 1591: {
 1592: 	struct resource_list_entry *rle;
 1593: 
 1594: 	rle = resource_list_find(rl, type, rid);
 1595: 	if (rle == NULL) {
 1596: 		rle = malloc(sizeof(struct resource_list_entry), M_BUS,
 1597: 			     M_INTWAIT);
 1598: 		if (!rle)
 1599: 			panic("resource_list_add: can't record entry");
 1600: 		SLIST_INSERT_HEAD(rl, rle, link);
 1601: 		rle->type = type;
 1602: 		rle->rid = rid;
 1603: 		rle->res = NULL;
 1604: 	}
 1605: 
 1606: 	if (rle->res)
 1607: 		panic("resource_list_add: resource entry is busy");
 1608: 
 1609: 	rle->start = start;
 1610: 	rle->end = end;
 1611: 	rle->count = count;
 1612: }
 1613: 
 1614: struct resource_list_entry*
 1615: resource_list_find(struct resource_list *rl,
 1616: 		   int type, int rid)
 1617: {
 1618: 	struct resource_list_entry *rle;
 1619: 
 1620: 	SLIST_FOREACH(rle, rl, link)
 1621: 		if (rle->type == type && rle->rid == rid)
 1622: 			return(rle);
 1623: 	return(NULL);
 1624: }
 1625: 
 1626: void
 1627: resource_list_delete(struct resource_list *rl,
 1628: 		     int type, int rid)
 1629: {
 1630: 	struct resource_list_entry *rle = resource_list_find(rl, type, rid);
 1631: 
 1632: 	if (rle) {
 1633: 		SLIST_REMOVE(rl, rle, resource_list_entry, link);
 1634: 		free(rle, M_BUS);
 1635: 	}
 1636: }
 1637: 
 1638: struct resource *
 1639: resource_list_alloc(struct resource_list *rl,
 1640: 		    device_t bus, device_t child,
 1641: 		    int type, int *rid,
 1642: 		    u_long start, u_long end,
 1643: 		    u_long count, u_int flags)
 1644: {
 1645: 	struct resource_list_entry *rle = 0;
 1646: 	int passthrough = (device_get_parent(child) != bus);
 1647: 	int isdefault = (start == 0UL && end == ~0UL);
 1648: 
 1649: 	if (passthrough) {
 1650: 		return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
 1651: 					  type, rid,
 1652: 					  start, end, count, flags));
 1653: 	}
 1654: 
 1655: 	rle = resource_list_find(rl, type, *rid);
 1656: 
 1657: 	if (!rle)
 1658: 		return(0);		/* no resource of that type/rid */
 1659: 	if (rle->res)
 1660: 		panic("resource_list_alloc: resource entry is busy");
 1661: 
 1662: 	if (isdefault) {
 1663: 		start = rle->start;
 1664: 		count = max(count, rle->count);
 1665: 		end = max(rle->end, start + count - 1);
 1666: 	}
 1667: 
 1668: 	rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
 1669: 				      type, rid, start, end, count, flags);
 1670: 
 1671: 	/*
 1672: 	 * Record the new range.
 1673: 	 */
 1674: 	if (rle->res) {
 1675: 		rle->start = rman_get_start(rle->res);
 1676: 		rle->end = rman_get_end(rle->res);
 1677: 		rle->count = count;
 1678: 	}
 1679: 
 1680: 	return(rle->res);
 1681: }
 1682: 
 1683: int
 1684: resource_list_release(struct resource_list *rl,
 1685: 		      device_t bus, device_t child,
 1686: 		      int type, int rid, struct resource *res)
 1687: {
 1688: 	struct resource_list_entry *rle = 0;
 1689: 	int passthrough = (device_get_parent(child) != bus);
 1690: 	int error;
 1691: 
 1692: 	if (passthrough) {
 1693: 		return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
 1694: 					    type, rid, res));
 1695: 	}
 1696: 
 1697: 	rle = resource_list_find(rl, type, rid);
 1698: 
 1699: 	if (!rle)
 1700: 		panic("resource_list_release: can't find resource");
 1701: 	if (!rle->res)
 1702: 		panic("resource_list_release: resource entry is not busy");
 1703: 
 1704: 	error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
 1705: 				     type, rid, res);
 1706: 	if (error)
 1707: 		return(error);
 1708: 
 1709: 	rle->res = NULL;
 1710: 	return(0);
 1711: }
 1712: 
 1713: int
 1714: resource_list_print_type(struct resource_list *rl, const char *name, int type,
 1715: 			 const char *format)
 1716: {
 1717: 	struct resource_list_entry *rle;
 1718: 	int printed, retval;
 1719: 
 1720: 	printed = 0;
 1721: 	retval = 0;
 1722: 	/* Yes, this is kinda cheating */
 1723: 	SLIST_FOREACH(rle, rl, link) {
 1724: 		if (rle->type == type) {
 1725: 			if (printed == 0)
 1726: 				retval += printf(" %s ", name);
 1727: 			else
 1728: 				retval += printf(",");
 1729: 			printed++;
 1730: 			retval += printf(format, rle->start);
 1731: 			if (rle->count > 1) {
 1732: 				retval += printf("-");
 1733: 				retval += printf(format, rle->start +
 1734: 						 rle->count - 1);
 1735: 			}
 1736: 		}
 1737: 	}
 1738: 	return(retval);
 1739: }
 1740: 
 1741: /*
 1742:  * Call DEVICE_IDENTIFY for each driver.
 1743:  */
 1744: int
 1745: bus_generic_probe(device_t dev)
 1746: {
 1747: 	devclass_t dc = dev->devclass;
 1748: 	driverlink_t dl;
 1749: 
 1750: 	TAILQ_FOREACH(dl, &dc->drivers, link)
 1751: 		DEVICE_IDENTIFY(dl->driver, dev);
 1752: 
 1753: 	return(0);
 1754: }
 1755: 
 1756: int
 1757: bus_generic_attach(device_t dev)
 1758: {
 1759: 	device_t child;
 1760: 
 1761: 	TAILQ_FOREACH(child, &dev->children, link)
 1762: 		device_probe_and_attach(child);
 1763: 
 1764: 	return(0);
 1765: }
 1766: 
 1767: int
 1768: bus_generic_detach(device_t dev)
 1769: {
 1770: 	device_t child;
 1771: 	int error;
 1772: 
 1773: 	if (dev->state != DS_ATTACHED)
 1774: 		return(EBUSY);
 1775: 
 1776: 	TAILQ_FOREACH(child, &dev->children, link)
 1777: 		if ((error = device_detach(child)) != 0)
 1778: 			return(error);
 1779: 
 1780: 	return 0;
 1781: }
 1782: 
 1783: int
 1784: bus_generic_shutdown(device_t dev)
 1785: {
 1786: 	device_t child;
 1787: 
 1788: 	TAILQ_FOREACH(child, &dev->children, link)
 1789: 		device_shutdown(child);
 1790: 
 1791: 	return(0);
 1792: }
 1793: 
 1794: int
 1795: bus_generic_suspend(device_t dev)
 1796: {
 1797: 	int error;
 1798: 	device_t child, child2;
 1799: 
 1800: 	TAILQ_FOREACH(child, &dev->children, link) {
 1801: 		error = DEVICE_SUSPEND(child);
 1802: 		if (error) {
 1803: 			for (child2 = TAILQ_FIRST(&dev->children);
 1804: 			     child2 && child2 != child; 
 1805: 			     child2 = TAILQ_NEXT(child2, link))
 1806: 				DEVICE_RESUME(child2);
 1807: 			return(error);
 1808: 		}
 1809: 	}
 1810: 	return(0);
 1811: }
 1812: 
 1813: int
 1814: bus_generic_resume(device_t dev)
 1815: {
 1816: 	device_t child;
 1817: 
 1818: 	TAILQ_FOREACH(child, &dev->children, link)
 1819: 		DEVICE_RESUME(child);
 1820: 		/* if resume fails, there's nothing we can usefully do... */
 1821: 
 1822: 	return(0);
 1823: }
 1824: 
 1825: int
 1826: bus_print_child_header(device_t dev, device_t child)
 1827: {
 1828: 	int retval = 0;
 1829: 
 1830: 	if (device_get_desc(child))
 1831: 		retval += device_printf(child, "<%s>", device_get_desc(child));
 1832: 	else
 1833: 		retval += printf("%s", device_get_nameunit(child));
 1834: 
 1835: 	return(retval);
 1836: }
 1837: 
 1838: int
 1839: bus_print_child_footer(device_t dev, device_t child)
 1840: {
 1841: 	return(printf(" on %s\n", device_get_nameunit(dev)));
 1842: }
 1843: 
 1844: int
 1845: bus_generic_print_child(device_t dev, device_t child)
 1846: {
 1847: 	int retval = 0;
 1848: 
 1849: 	retval += bus_print_child_header(dev, child);
 1850: 	retval += bus_print_child_footer(dev, child);
 1851: 
 1852: 	return(retval);
 1853: }
 1854: 
 1855: int
 1856: bus_generic_read_ivar(device_t dev, device_t child, int index, 
 1857: 		      uintptr_t * result)
 1858: {
 1859:     return(ENOENT);
 1860: }
 1861: 
 1862: int
 1863: bus_generic_write_ivar(device_t dev, device_t child, int index, 
 1864: 		       uintptr_t value)
 1865: {
 1866:     return(ENOENT);
 1867: }
 1868: 
 1869: struct resource_list *
 1870: bus_generic_get_resource_list(device_t dev, device_t child)
 1871: {
 1872:     return(NULL);
 1873: }
 1874: 
 1875: void
 1876: bus_generic_driver_added(device_t dev, driver_t *driver)
 1877: {
 1878: 	device_t child;
 1879: 
 1880: 	DEVICE_IDENTIFY(driver, dev);
 1881: 	TAILQ_FOREACH(child, &dev->children, link)
 1882: 		if (child->state == DS_NOTPRESENT)
 1883: 			device_probe_and_attach(child);
 1884: }
 1885: 
 1886: int
 1887: bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 
 1888: 		       int flags, driver_intr_t *intr, void *arg,
 1889: 		       void **cookiep)
 1890: {
 1891: 	/* Propagate up the bus hierarchy until someone handles it. */
 1892: 	if (dev->parent)
 1893: 		return(BUS_SETUP_INTR(dev->parent, child, irq, flags,
 1894: 				      intr, arg, cookiep));
 1895: 	else
 1896: 		return(EINVAL);
 1897: }
 1898: 
 1899: int
 1900: bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
 1901: 			  void *cookie)
 1902: {
 1903: 	/* Propagate up the bus hierarchy until someone handles it. */
 1904: 	if (dev->parent)
 1905: 		return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
 1906: 	else
 1907: 		return(EINVAL);
 1908: }
 1909: 
 1910: struct resource *
 1911: bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
 1912: 			   u_long start, u_long end, u_long count, u_int flags)
 1913: {
 1914: 	/* Propagate up the bus hierarchy until someone handles it. */
 1915: 	if (dev->parent)
 1916: 		return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 
 1917: 					   start, end, count, flags));
 1918: 	else
 1919: 		return(NULL);
 1920: }
 1921: 
 1922: int
 1923: bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
 1924: 			     struct resource *r)
 1925: {
 1926: 	/* Propagate up the bus hierarchy until someone handles it. */
 1927: 	if (dev->parent)
 1928: 		return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
 1929: 	else
 1930: 		return(EINVAL);
 1931: }
 1932: 
 1933: int
 1934: bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
 1935: 			      struct resource *r)
 1936: {
 1937: 	/* Propagate up the bus hierarchy until someone handles it. */
 1938: 	if (dev->parent)
 1939: 		return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
 1940: 	else
 1941: 		return(EINVAL);
 1942: }
 1943: 
 1944: int
 1945: bus_generic_deactivate_resource(device_t dev, device_t child, int type,
 1946: 				int rid, struct resource *r)
 1947: {
 1948: 	/* Propagate up the bus hierarchy until someone handles it. */
 1949: 	if (dev->parent)
 1950: 		return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
 1951: 					       r));
 1952: 	else
 1953: 		return(EINVAL);
 1954: }
 1955: 
 1956: int
 1957: bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig,
 1958:     enum intr_polarity pol)
 1959: {
 1960: 	/* Propagate up the bus hierarchy until someone handles it. */
 1961: 	if (dev->parent)
 1962: 		return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol));
 1963: 	else
 1964: 		return(EINVAL);
 1965: }
 1966: 
 1967: int
 1968: bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
 1969:     u_long *startp, u_long *countp)
 1970: {
 1971: 	struct resource_list *rl = NULL;
 1972: 	struct resource_list_entry *rle = NULL;
 1973: 
 1974: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 1975: 	if (!rl)
 1976: 		return(EINVAL);
 1977: 
 1978: 	rle = resource_list_find(rl, type, rid);
 1979: 	if (!rle)
 1980: 		return(ENOENT);
 1981: 
 1982: 	if (startp)
 1983: 		*startp = rle->start;
 1984: 	if (countp)
 1985: 		*countp = rle->count;
 1986: 
 1987: 	return(0);
 1988: }
 1989: 
 1990: int
 1991: bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
 1992:     u_long start, u_long count)
 1993: {
 1994: 	struct resource_list *rl = NULL;
 1995: 
 1996: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 1997: 	if (!rl)
 1998: 		return(EINVAL);
 1999: 
 2000: 	resource_list_add(rl, type, rid, start, (start + count - 1), count);
 2001: 
 2002: 	return(0);
 2003: }
 2004: 
 2005: void
 2006: bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
 2007: {
 2008: 	struct resource_list *rl = NULL;
 2009: 
 2010: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2011: 	if (!rl)
 2012: 		return;
 2013: 
 2014: 	resource_list_delete(rl, type, rid);
 2015: }
 2016: 
 2017: int
 2018: bus_generic_rl_release_resource(device_t dev, device_t child, int type,
 2019:     int rid, struct resource *r)
 2020: {
 2021: 	struct resource_list *rl = NULL;
 2022: 
 2023: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2024: 	if (!rl)
 2025: 		return(EINVAL);
 2026: 
 2027: 	return(resource_list_release(rl, dev, child, type, rid, r));
 2028: }
 2029: 
 2030: struct resource *
 2031: bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
 2032:     int *rid, u_long start, u_long end, u_long count, u_int flags)
 2033: {
 2034: 	struct resource_list *rl = NULL;
 2035: 
 2036: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2037: 	if (!rl)
 2038: 		return(NULL);
 2039: 
 2040: 	return(resource_list_alloc(rl, dev, child, type, rid,
 2041: 	    start, end, count, flags));
 2042: }
 2043: 
 2044: int
 2045: bus_generic_child_present(device_t bus, device_t child)
 2046: {
 2047: 	return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
 2048: }
 2049: 
 2050: 
 2051: /*
 2052:  * Some convenience functions to make it easier for drivers to use the
 2053:  * resource-management functions.  All these really do is hide the
 2054:  * indirection through the parent's method table, making for slightly
 2055:  * less-wordy code.  In the future, it might make sense for this code
 2056:  * to maintain some sort of a list of resources allocated by each device.
 2057:  */
 2058: struct resource *
 2059: bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
 2060: 		   u_long count, u_int flags)
 2061: {
 2062: 	if (dev->parent == 0)
 2063: 		return(0);
 2064: 	return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
 2065: 				  count, flags));
 2066: }
 2067: 
 2068: int
 2069: bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
 2070: {
 2071: 	if (dev->parent == 0)
 2072: 		return(EINVAL);
 2073: 	return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
 2074: }
 2075: 
 2076: int
 2077: bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
 2078: {
 2079: 	if (dev->parent == 0)
 2080: 		return(EINVAL);
 2081: 	return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
 2082: }
 2083: 
 2084: int
 2085: bus_release_resource(device_t dev, int type, int rid, struct resource *r)
 2086: {
 2087: 	if (dev->parent == 0)
 2088: 		return(EINVAL);
 2089: 	return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
 2090: }
 2091: 
 2092: int
 2093: bus_setup_intr(device_t dev, struct resource *r, int flags,
 2094: 	       driver_intr_t handler, void *arg, void **cookiep)
 2095: {
 2096: 	if (dev->parent == 0)
 2097: 		return(EINVAL);
 2098: 	return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
 2099: 	       cookiep));
 2100: }
 2101: 
 2102: int
 2103: bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
 2104: {
 2105: 	if (dev->parent == 0)
 2106: 		return(EINVAL);
 2107: 	return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
 2108: }
 2109: 
 2110: int
 2111: bus_set_resource(device_t dev, int type, int rid,
 2112: 		 u_long start, u_long count)
 2113: {
 2114: 	return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2115: 				start, count));
 2116: }
 2117: 
 2118: int
 2119: bus_get_resource(device_t dev, int type, int rid,
 2120: 		 u_long *startp, u_long *countp)
 2121: {
 2122: 	return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2123: 				startp, countp));
 2124: }
 2125: 
 2126: u_long
 2127: bus_get_resource_start(device_t dev, int type, int rid)
 2128: {
 2129: 	u_long start, count;
 2130: 	int error;
 2131: 
 2132: 	error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2133: 				 &start, &count);
 2134: 	if (error)
 2135: 		return(0);
 2136: 	return(start);
 2137: }
 2138: 
 2139: u_long
 2140: bus_get_resource_count(device_t dev, int type, int rid)
 2141: {
 2142: 	u_long start, count;
 2143: 	int error;
 2144: 
 2145: 	error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2146: 				 &start, &count);
 2147: 	if (error)
 2148: 		return(0);
 2149: 	return(count);
 2150: }
 2151: 
 2152: void
 2153: bus_delete_resource(device_t dev, int type, int rid)
 2154: {
 2155: 	BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
 2156: }
 2157: 
 2158: int
 2159: bus_child_present(device_t child)
 2160: {
 2161: 	return (BUS_CHILD_PRESENT(device_get_parent(child), child));
 2162: }
 2163: 
 2164: int
 2165: bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
 2166: {
 2167: 	device_t parent;
 2168: 
 2169: 	parent = device_get_parent(child);
 2170: 	if (parent == NULL) {
 2171: 		*buf = '\0';
 2172: 		return (0);
 2173: 	}
 2174: 	return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
 2175: }
 2176: 
 2177: int
 2178: bus_child_location_str(device_t child, char *buf, size_t buflen)
 2179: {
 2180: 	device_t parent;
 2181: 
 2182: 	parent = device_get_parent(child);
 2183: 	if (parent == NULL) {
 2184: 		*buf = '\0';
 2185: 		return (0);
 2186: 	}
 2187: 	return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
 2188: }
 2189: 
 2190: static int
 2191: root_print_child(device_t dev, device_t child)
 2192: {
 2193: 	return(0);
 2194: }
 2195: 
 2196: static int
 2197: root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
 2198: 		void **cookiep)
 2199: {
 2200: 	/*
 2201: 	 * If an interrupt mapping gets to here something bad has happened.
 2202: 	 */
 2203: 	panic("root_setup_intr");
 2204: }
 2205: 
 2206: /*
 2207:  * If we get here, assume that the device is permanant and really is
 2208:  * present in the system.  Removable bus drivers are expected to intercept
 2209:  * this call long before it gets here.  We return -1 so that drivers that
 2210:  * really care can check vs -1 or some ERRNO returned higher in the food
 2211:  * chain.
 2212:  */
 2213: static int
 2214: root_child_present(device_t dev, device_t child)
 2215: {
 2216: 	return(-1);
 2217: }
 2218: 
 2219: /*
 2220:  * XXX NOTE! other defaults may be set in bus_if.m
 2221:  */
 2222: static kobj_method_t root_methods[] = {
 2223: 	/* Device interface */
 2224: 	KOBJMETHOD(device_shutdown,	bus_generic_shutdown),
 2225: 	KOBJMETHOD(device_suspend,	bus_generic_suspend),
 2226: 	KOBJMETHOD(device_resume,	bus_generic_resume),
 2227: 
 2228: 	/* Bus interface */
 2229: 	KOBJMETHOD(bus_print_child,	root_print_child),
 2230: 	KOBJMETHOD(bus_read_ivar,	bus_generic_read_ivar),
 2231: 	KOBJMETHOD(bus_write_ivar,	bus_generic_write_ivar),
 2232: 	KOBJMETHOD(bus_setup_intr,	root_setup_intr),
 2233: 	KOBJMETHOD(bus_child_present,   root_child_present),
 2234: 
 2235: 	{ 0, 0 }
 2236: };
 2237: 
 2238: static driver_t root_driver = {
 2239: 	"root",
 2240: 	root_methods,
 2241: 	1,			/* no softc */
 2242: };
 2243: 
 2244: device_t	root_bus;
 2245: devclass_t	root_devclass;
 2246: 
 2247: static int
 2248: root_bus_module_handler(module_t mod, int what, void* arg)
 2249: {
 2250: 	switch (what) {
 2251: 	case MOD_LOAD:
 2252: 		root_bus = make_device(NULL, "root", 0);
 2253: 		root_bus->desc = "System root bus";
 2254: 		kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
 2255: 		root_bus->driver = &root_driver;
 2256: 		root_bus->state = DS_ATTACHED;
 2257: 		root_devclass = devclass_find_internal("root", FALSE);
 2258: 		return(0);
 2259: 
 2260: 	case MOD_SHUTDOWN:
 2261: 		device_shutdown(root_bus);
 2262: 		return(0);
 2263: 	default:
 2264: 		return(0);
 2265: 	}
 2266: }
 2267: 
 2268: static moduledata_t root_bus_mod = {
 2269: 	"rootbus",
 2270: 	root_bus_module_handler,
 2271: 	0
 2272: };
 2273: DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
 2274: 
 2275: void
 2276: root_bus_configure(void)
 2277: {
 2278: 	device_t dev;
 2279: 
 2280: 	PDEBUG(("."));
 2281: 
 2282: 	TAILQ_FOREACH(dev, &root_bus->children, link)
 2283: 		device_probe_and_attach(dev);
 2284: }
 2285: 
 2286: int
 2287: driver_module_handler(module_t mod, int what, void *arg)
 2288: {
 2289: 	int error, i;
 2290: 	struct driver_module_data *dmd;
 2291: 	devclass_t bus_devclass;
 2292: 
 2293: 	dmd = (struct driver_module_data *)arg;
 2294: 	bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE);
 2295: 	error = 0;
 2296: 
 2297: 	switch (what) {
 2298: 	case MOD_LOAD:
 2299: 		if (dmd->dmd_chainevh)
 2300: 			error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
 2301: 
 2302: 		for (i = 0; !error && i < dmd->dmd_ndrivers; i++) {
 2303: 			PDEBUG(("Loading module: driver %s on bus %s",
 2304: 				DRIVERNAME(dmd->dmd_drivers[i]), 
 2305: 				dmd->dmd_busname));
 2306: 			error = devclass_add_driver(bus_devclass,
 2307: 						    dmd->dmd_drivers[i]);
 2308: 		}
 2309: 		if (error)
 2310: 			break;
 2311: 
 2312: 		/*
 2313: 		 * The drivers loaded in this way are assumed to all
 2314: 		 * implement the same devclass.
 2315: 		 */
 2316: 		*dmd->dmd_devclass =
 2317: 			devclass_find_internal(dmd->dmd_drivers[0]->name,
 2318: 					       TRUE);
 2319: 		break;
 2320: 
 2321: 	case MOD_UNLOAD:
 2322: 		for (i = 0; !error && i < dmd->dmd_ndrivers; i++) {
 2323: 			PDEBUG(("Unloading module: driver %s from bus %s",
 2324: 				DRIVERNAME(dmd->dmd_drivers[i]), 
 2325: 				dmd->dmd_busname));
 2326: 			error = devclass_delete_driver(bus_devclass,
 2327: 						       dmd->dmd_drivers[i]);
 2328: 		}
 2329: 
 2330: 		if (!error && dmd->dmd_chainevh)
 2331: 			error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
 2332: 		break;
 2333: 	}
 2334: 
 2335: 	return (error);
 2336: }
 2337: 
 2338: #ifdef BUS_DEBUG
 2339: 
 2340: /*
 2341:  * The _short versions avoid iteration by not calling anything that prints
 2342:  * more than oneliners. I love oneliners.
 2343:  */
 2344: 
 2345: static void
 2346: print_device_short(device_t dev, int indent)
 2347: {
 2348: 	if (!dev)
 2349: 		return;
 2350: 
 2351: 	indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
 2352: 		      dev->unit, dev->desc,
 2353: 		      (dev->parent? "":"no "),
 2354: 		      (TAILQ_EMPTY(&dev->children)? "no ":""),
 2355: 		      (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
 2356: 		      (dev->flags&DF_FIXEDCLASS? "fixed,":""),
 2357: 		      (dev->flags&DF_WILDCARD? "wildcard,":""),
 2358: 		      (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
 2359: 		      (dev->ivars? "":"no "),
 2360: 		      (dev->softc? "":"no "),
 2361: 		      dev->busy));
 2362: }
 2363: 
 2364: static void
 2365: print_device(device_t dev, int indent)
 2366: {
 2367: 	if (!dev)
 2368: 		return;
 2369: 
 2370: 	print_device_short(dev, indent);
 2371: 
 2372: 	indentprintf(("Parent:\n"));
 2373: 	print_device_short(dev->parent, indent+1);
 2374: 	indentprintf(("Driver:\n"));
 2375: 	print_driver_short(dev->driver, indent+1);
 2376: 	indentprintf(("Devclass:\n"));
 2377: 	print_devclass_short(dev->devclass, indent+1);
 2378: }
 2379: 
 2380: /*
 2381:  * Print the device and all its children (indented).
 2382:  */
 2383: void
 2384: print_device_tree_short(device_t dev, int indent)
 2385: {
 2386: 	device_t child;
 2387: 
 2388: 	if (!dev)
 2389: 		return;
 2390: 
 2391: 	print_device_short(dev, indent);
 2392: 
 2393: 	TAILQ_FOREACH(child, &dev->children, link)
 2394: 		print_device_tree_short(child, indent+1);
 2395: }
 2396: 
 2397: /*
 2398:  * Print the device and all its children (indented).
 2399:  */
 2400: void
 2401: print_device_tree(device_t dev, int indent)
 2402: {
 2403: 	device_t child;
 2404: 
 2405: 	if (!dev)
 2406: 		return;
 2407: 
 2408: 	print_device(dev, indent);
 2409: 
 2410: 	TAILQ_FOREACH(child, &dev->children, link)
 2411: 		print_device_tree(child, indent+1);
 2412: }
 2413: 
 2414: static void
 2415: print_driver_short(driver_t *driver, int indent)
 2416: {
 2417: 	if (!driver)
 2418: 		return;
 2419: 
 2420: 	indentprintf(("driver %s: softc size = %d\n",
 2421: 		      driver->name, driver->size));
 2422: }
 2423: 
 2424: static void
 2425: print_driver(driver_t *driver, int indent)
 2426: {
 2427: 	if (!driver)
 2428: 		return;
 2429: 
 2430: 	print_driver_short(driver, indent);
 2431: }
 2432: 
 2433: 
 2434: static void
 2435: print_driver_list(driver_list_t drivers, int indent)
 2436: {
 2437: 	driverlink_t driver;
 2438: 
 2439: 	TAILQ_FOREACH(driver, &drivers, link)
 2440: 		print_driver(driver->driver, indent);
 2441: }
 2442: 
 2443: static void
 2444: print_devclass_short(devclass_t dc, int indent)
 2445: {
 2446: 	if (!dc)
 2447: 		return;
 2448: 
 2449: 	indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
 2450: }
 2451: 
 2452: static void
 2453: print_devclass(devclass_t dc, int indent)
 2454: {
 2455: 	int i;
 2456: 
 2457: 	if (!dc)
 2458: 		return;
 2459: 
 2460: 	print_devclass_short(dc, indent);
 2461: 	indentprintf(("Drivers:\n"));
 2462: 	print_driver_list(dc->drivers, indent+1);
 2463: 
 2464: 	indentprintf(("Devices:\n"));
 2465: 	for (i = 0; i < dc->maxunit; i++)
 2466: 		if (dc->devices[i])
 2467: 			print_device(dc->devices[i], indent+1);
 2468: }
 2469: 
 2470: void
 2471: print_devclass_list_short(void)
 2472: {
 2473: 	devclass_t dc;
 2474: 
 2475: 	printf("Short listing of devclasses, drivers & devices:\n");
 2476: 	TAILQ_FOREACH(dc, &devclasses, link) {
 2477: 		print_devclass_short(dc, 0);
 2478: 	}
 2479: }
 2480: 
 2481: void
 2482: print_devclass_list(void)
 2483: {
 2484: 	devclass_t dc;
 2485: 
 2486: 	printf("Full listing of devclasses, drivers & devices:\n");
 2487: 	TAILQ_FOREACH(dc, &devclasses, link) {
 2488: 		print_devclass(dc, 0);
 2489: 	}
 2490: }
 2491: 
 2492: #endif
 2493: 
 2494: /*
 2495:  * Check to see if a device is disabled via a disabled hint.
 2496:  */
 2497: int
 2498: resource_disabled(const char *name, int unit)
 2499: {
 2500: 	int error, value;
 2501: 
 2502: 	error = resource_int_value(name, unit, "disabled", &value);
 2503: 	if (error)
 2504: 	       return(0);
 2505: 	return(value);
 2506: }