File:  [DragonFly] / src / sys / kern / subr_bus.c
Revision 1.17: download - view: text, annotated - select for diffs
Thu Apr 15 13:31:41 2004 UTC (10 years, 3 months ago) by joerg
Branches: MAIN
CVS tags: HEAD
KObj extension stage IIIb/III

Merge inheritance support from FreeBSD:
  * Add a simpler form of 'inheritance' for devclasses. Each devclass can
    have a parent devclass. Searches for drivers continue up the chain of
    devclasses until either a matching driver is found or a devclass is
    reached which has no parent. This can allow, for instance, pci drivers
    to match cardbus devices (assuming that cardbus declares pci as its
    parent devclass).

    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 1.17 2004/04/15 13:31:41 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, const char *parentname,
  111: 		       int create)
  112: {
  113: 	devclass_t dc;
  114: 
  115: 	PDEBUG(("looking for %s", classname));
  116: 	if (classname == NULL)
  117: 		return(NULL);
  118: 
  119: 	TAILQ_FOREACH(dc, &devclasses, link)
  120: 		if (!strcmp(dc->name, classname))
  121: 			break;
  122: 
  123: 	if (create && !dc) {
  124: 		PDEBUG(("creating %s", classname));
  125: 		dc = malloc(sizeof(struct devclass) + strlen(classname) + 1,
  126: 			    M_BUS, M_INTWAIT | M_ZERO);
  127: 		if (!dc)
  128: 			return(NULL);
  129: 		dc->parent = NULL;
  130: 		dc->name = (char*) (dc + 1);
  131: 		strcpy(dc->name, classname);
  132: 		dc->devices = NULL;
  133: 		dc->maxunit = 0;
  134: 		TAILQ_INIT(&dc->drivers);
  135: 		TAILQ_INSERT_TAIL(&devclasses, dc, link);
  136: 	}
  137: 	if (parentname && dc && !dc->parent)
  138: 		dc->parent = devclass_find_internal(parentname, NULL, FALSE);
  139: 
  140: 	return(dc);
  141: }
  142: 
  143: devclass_t
  144: devclass_create(const char *classname)
  145: {
  146: 	return(devclass_find_internal(classname, NULL, TRUE));
  147: }
  148: 
  149: devclass_t
  150: devclass_find(const char *classname)
  151: {
  152: 	return(devclass_find_internal(classname, NULL, FALSE));
  153: }
  154: 
  155: int
  156: devclass_add_driver(devclass_t dc, driver_t *driver)
  157: {
  158: 	driverlink_t dl;
  159: 	int i;
  160: 
  161: 	PDEBUG(("%s", DRIVERNAME(driver)));
  162: 
  163: 	dl = malloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO);
  164: 	if (!dl)
  165: 		return(ENOMEM);
  166: 
  167: 	/*
  168: 	 * Compile the driver's methods. Also increase the reference count
  169: 	 * so that the class doesn't get freed when the last instance
  170: 	 * goes. This means we can safely use static methods and avoids a
  171: 	 * double-free in devclass_delete_driver.
  172: 	 */
  173: 	kobj_class_instantiate(driver);
  174: 
  175: 	/*
  176: 	 * Make sure the devclass which the driver is implementing exists.
  177: 	 */
  178: 	devclass_find_internal(driver->name, NULL, TRUE);
  179: 
  180: 	dl->driver = driver;
  181: 	TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
  182: 
  183: 	/*
  184: 	 * Call BUS_DRIVER_ADDED for any existing busses in this class.
  185: 	 */
  186: 	for (i = 0; i < dc->maxunit; i++)
  187: 		if (dc->devices[i])
  188: 			BUS_DRIVER_ADDED(dc->devices[i], driver);
  189: 
  190: 	return(0);
  191: }
  192: 
  193: int
  194: devclass_delete_driver(devclass_t busclass, driver_t *driver)
  195: {
  196: 	devclass_t dc = devclass_find(driver->name);
  197: 	driverlink_t dl;
  198: 	device_t dev;
  199: 	int i;
  200: 	int error;
  201: 
  202: 	PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
  203: 
  204: 	if (!dc)
  205: 		return(0);
  206: 
  207: 	/*
  208: 	 * Find the link structure in the bus' list of drivers.
  209: 	 */
  210: 	TAILQ_FOREACH(dl, &busclass->drivers, link)
  211: 		if (dl->driver == driver)
  212: 			break;
  213: 
  214: 	if (!dl) {
  215: 		PDEBUG(("%s not found in %s list", driver->name, busclass->name));
  216: 		return(ENOENT);
  217: 	}
  218: 
  219: 	/*
  220: 	 * Disassociate from any devices.  We iterate through all the
  221: 	 * devices in the devclass of the driver and detach any which are
  222: 	 * using the driver and which have a parent in the devclass which
  223: 	 * we are deleting from.
  224: 	 *
  225: 	 * Note that since a driver can be in multiple devclasses, we
  226: 	 * should not detach devices which are not children of devices in
  227: 	 * the affected devclass.
  228: 	 */
  229: 	for (i = 0; i < dc->maxunit; i++)
  230: 		if (dc->devices[i]) {
  231: 			dev = dc->devices[i];
  232: 			if (dev->driver == driver && dev->parent &&
  233: 			    dev->parent->devclass == busclass) {
  234: 				if ((error = device_detach(dev)) != 0)
  235: 					return(error);
  236: 				device_set_driver(dev, NULL);
  237: 		    	}
  238: 		}
  239: 
  240: 	TAILQ_REMOVE(&busclass->drivers, dl, link);
  241: 	free(dl, M_BUS);
  242: 
  243: 	kobj_class_uninstantiate(driver);
  244: 
  245: 	return(0);
  246: }
  247: 
  248: static driverlink_t
  249: devclass_find_driver_internal(devclass_t dc, const char *classname)
  250: {
  251: 	driverlink_t dl;
  252: 
  253: 	PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
  254: 
  255: 	TAILQ_FOREACH(dl, &dc->drivers, link)
  256: 		if (!strcmp(dl->driver->name, classname))
  257: 			return(dl);
  258: 
  259: 	PDEBUG(("not found"));
  260: 	return(NULL);
  261: }
  262: 
  263: kobj_class_t
  264: devclass_find_driver(devclass_t dc, const char *classname)
  265: {
  266: 	driverlink_t dl;
  267: 
  268: 	dl = devclass_find_driver_internal(dc, classname);
  269: 	if (dl)
  270: 		return(dl->driver);
  271: 	else
  272: 		return(NULL);
  273: }
  274: 
  275: const char *
  276: devclass_get_name(devclass_t dc)
  277: {
  278: 	return(dc->name);
  279: }
  280: 
  281: device_t
  282: devclass_get_device(devclass_t dc, int unit)
  283: {
  284: 	if (dc == NULL || unit < 0 || unit >= dc->maxunit)
  285: 		return(NULL);
  286: 	return(dc->devices[unit]);
  287: }
  288: 
  289: void *
  290: devclass_get_softc(devclass_t dc, int unit)
  291: {
  292: 	device_t dev;
  293: 
  294: 	dev = devclass_get_device(dc, unit);
  295: 	if (!dev)
  296: 		return(NULL);
  297: 
  298: 	return(device_get_softc(dev));
  299: }
  300: 
  301: int
  302: devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
  303: {
  304: 	int i;
  305: 	int count;
  306: 	device_t *list;
  307:     
  308: 	count = 0;
  309: 	for (i = 0; i < dc->maxunit; i++)
  310: 		if (dc->devices[i])
  311: 			count++;
  312: 
  313: 	list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
  314: 	if (list == NULL)
  315: 		return(ENOMEM);
  316: 
  317: 	count = 0;
  318: 	for (i = 0; i < dc->maxunit; i++)
  319: 		if (dc->devices[i]) {
  320: 			list[count] = dc->devices[i];
  321: 			count++;
  322: 		}
  323: 
  324: 	*devlistp = list;
  325: 	*devcountp = count;
  326: 
  327: 	return(0);
  328: }
  329: 
  330: int
  331: devclass_get_maxunit(devclass_t dc)
  332: {
  333: 	return(dc->maxunit);
  334: }
  335: 
  336: void
  337: devclass_set_parent(devclass_t dc, devclass_t pdc)
  338: {
  339:         dc->parent = pdc;
  340: }
  341: 
  342: devclass_t
  343: devclass_get_parent(devclass_t dc)
  344: {
  345: 	return(dc->parent);
  346: }
  347: 
  348: static int
  349: devclass_alloc_unit(devclass_t dc, int *unitp)
  350: {
  351: 	int unit = *unitp;
  352: 
  353: 	PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
  354: 
  355: 	/* If we have been given a wired unit number, check for existing device */
  356: 	if (unit != -1) {
  357: 		if (unit >= 0 && unit < dc->maxunit &&
  358: 		    dc->devices[unit] != NULL) {
  359: 			if (bootverbose)
  360: 				printf("%s-: %s%d exists, using next available unit number\n",
  361: 				       dc->name, dc->name, unit);
  362: 			/* find the next available slot */
  363: 			while (++unit < dc->maxunit && dc->devices[unit] != NULL)
  364: 				;
  365: 		}
  366: 	} else {
  367: 		/* Unwired device, find the next available slot for it */
  368: 		unit = 0;
  369: 		while (unit < dc->maxunit && dc->devices[unit] != NULL)
  370: 			unit++;
  371: 	}
  372: 
  373: 	/*
  374: 	 * We've selected a unit beyond the length of the table, so let's
  375: 	 * extend the table to make room for all units up to and including
  376: 	 * this one.
  377: 	 */
  378: 	if (unit >= dc->maxunit) {
  379: 		device_t *newlist;
  380: 		int newsize;
  381: 
  382: 		newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t));
  383: 		newlist = malloc(sizeof(device_t) * newsize, M_BUS,
  384: 				 M_INTWAIT | M_ZERO);
  385: 		if (newlist == NULL)
  386: 			return(ENOMEM);
  387: 		bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
  388: 		if (dc->devices)
  389: 			free(dc->devices, M_BUS);
  390: 		dc->devices = newlist;
  391: 		dc->maxunit = newsize;
  392: 	}
  393: 	PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
  394: 
  395: 	*unitp = unit;
  396: 	return(0);
  397: }
  398: 
  399: static int
  400: devclass_add_device(devclass_t dc, device_t dev)
  401: {
  402: 	int buflen, error;
  403: 
  404: 	PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
  405: 
  406: 	buflen = strlen(dc->name) + 5;
  407: 	dev->nameunit = malloc(buflen, M_BUS, M_INTWAIT | M_ZERO);
  408: 	if (!dev->nameunit)
  409: 		return(ENOMEM);
  410: 
  411: 	if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
  412: 		free(dev->nameunit, M_BUS);
  413: 		dev->nameunit = NULL;
  414: 		return(error);
  415: 	}
  416: 	dc->devices[dev->unit] = dev;
  417: 	dev->devclass = dc;
  418: 	snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
  419: 
  420: #ifdef DEVICE_SYSCTLS
  421: 	device_register_oids(dev);
  422: #endif
  423: 
  424: 	return(0);
  425: }
  426: 
  427: static int
  428: devclass_delete_device(devclass_t dc, device_t dev)
  429: {
  430: 	if (!dc || !dev)
  431: 		return(0);
  432: 
  433: 	PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
  434: 
  435: 	if (dev->devclass != dc || dc->devices[dev->unit] != dev)
  436: 		panic("devclass_delete_device: inconsistent device class");
  437: 	dc->devices[dev->unit] = NULL;
  438: 	if (dev->flags & DF_WILDCARD)
  439: 		dev->unit = -1;
  440: 	dev->devclass = NULL;
  441: 	free(dev->nameunit, M_BUS);
  442: 	dev->nameunit = NULL;
  443: 
  444: #ifdef DEVICE_SYSCTLS
  445: 	device_unregister_oids(dev);
  446: #endif
  447: 
  448: 	return(0);
  449: }
  450: 
  451: static device_t
  452: make_device(device_t parent, const char *name, int unit)
  453: {
  454: 	device_t dev;
  455: 	devclass_t dc;
  456: 
  457: 	PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
  458: 
  459: 	if (name != NULL) {
  460: 		dc = devclass_find_internal(name, NULL, TRUE);
  461: 		if (!dc) {
  462: 			printf("make_device: can't find device class %s\n", name);
  463: 			return(NULL);
  464: 		}
  465: 	} else
  466: 		dc = NULL;
  467: 
  468: 	dev = malloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO);
  469: 	if (!dev)
  470: 		return(0);
  471: 
  472: 	dev->parent = parent;
  473: 	TAILQ_INIT(&dev->children);
  474: 	kobj_init((kobj_t) dev, &null_class);
  475: 	dev->driver = NULL;
  476: 	dev->devclass = NULL;
  477: 	dev->unit = unit;
  478: 	dev->nameunit = NULL;
  479: 	dev->desc = NULL;
  480: 	dev->busy = 0;
  481: 	dev->devflags = 0;
  482: 	dev->flags = DF_ENABLED;
  483: 	dev->order = 0;
  484: 	if (unit == -1)
  485: 		dev->flags |= DF_WILDCARD;
  486: 	if (name) {
  487: 		dev->flags |= DF_FIXEDCLASS;
  488: 		if (devclass_add_device(dc, dev) != 0) {
  489: 			kobj_delete((kobj_t)dev, M_BUS);
  490: 			return(NULL);
  491: 		}
  492:     	}
  493: 	dev->ivars = NULL;
  494: 	dev->softc = NULL;
  495: 
  496: 	dev->state = DS_NOTPRESENT;
  497: 
  498: 	return(dev);
  499: }
  500: 
  501: static int
  502: device_print_child(device_t dev, device_t child)
  503: {
  504: 	int retval = 0;
  505: 
  506: 	if (device_is_alive(child))
  507: 		retval += BUS_PRINT_CHILD(dev, child);
  508: 	else
  509: 		retval += device_printf(child, " not found\n");
  510: 
  511: 	return(retval);
  512: }
  513: 
  514: device_t
  515: device_add_child(device_t dev, const char *name, int unit)
  516: {
  517: 	return device_add_child_ordered(dev, 0, name, unit);
  518: }
  519: 
  520: device_t
  521: device_add_child_ordered(device_t dev, int order, const char *name, int unit)
  522: {
  523: 	device_t child;
  524: 	device_t place;
  525: 
  526: 	PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev),
  527: 		order, unit));
  528: 
  529: 	child = make_device(dev, name, unit);
  530: 	if (child == NULL)
  531: 		return child;
  532: 	child->order = order;
  533: 
  534: 	TAILQ_FOREACH(place, &dev->children, link)
  535: 		if (place->order > order)
  536: 			break;
  537: 
  538: 	if (place) {
  539: 		/*
  540: 		 * The device 'place' is the first device whose order is
  541: 		 * greater than the new child.
  542: 		 */
  543: 		TAILQ_INSERT_BEFORE(place, child, link);
  544: 	} else {
  545: 		/*
  546: 		 * The new child's order is greater or equal to the order of
  547: 		 * any existing device. Add the child to the tail of the list.
  548: 		 */
  549: 		TAILQ_INSERT_TAIL(&dev->children, child, link);
  550:     	}
  551: 
  552: 	return(child);
  553: }
  554: 
  555: int
  556: device_delete_child(device_t dev, device_t child)
  557: {
  558: 	int error;
  559: 	device_t grandchild;
  560: 
  561: 	PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
  562: 
  563: 	/* remove children first */
  564: 	while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
  565:         	error = device_delete_child(child, grandchild);
  566: 		if (error)
  567: 			return(error);
  568: 	}
  569: 
  570: 	if ((error = device_detach(child)) != 0)
  571: 		return(error);
  572: 	if (child->devclass)
  573: 		devclass_delete_device(child->devclass, child);
  574: 	TAILQ_REMOVE(&dev->children, child, link);
  575: 	device_set_desc(child, NULL);
  576: 	kobj_delete((kobj_t)child, M_BUS);
  577: 
  578: 	return(0);
  579: }
  580: 
  581: /*
  582:  * Find only devices attached to this bus.
  583:  */
  584: device_t
  585: device_find_child(device_t dev, const char *classname, int unit)
  586: {
  587: 	devclass_t dc;
  588: 	device_t child;
  589: 
  590: 	dc = devclass_find(classname);
  591: 	if (!dc)
  592: 		return(NULL);
  593: 
  594: 	child = devclass_get_device(dc, unit);
  595: 	if (child && child->parent == dev)
  596: 		return(child);
  597: 	return(NULL);
  598: }
  599: 
  600: static driverlink_t
  601: first_matching_driver(devclass_t dc, device_t dev)
  602: {
  603: 	if (dev->devclass)
  604: 		return(devclass_find_driver_internal(dc, dev->devclass->name));
  605: 	else
  606: 		return(TAILQ_FIRST(&dc->drivers));
  607: }
  608: 
  609: static driverlink_t
  610: next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
  611: {
  612: 	if (dev->devclass) {
  613: 		driverlink_t dl;
  614: 		for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
  615: 			if (!strcmp(dev->devclass->name, dl->driver->name))
  616: 				return(dl);
  617: 		return(NULL);
  618: 	} else
  619: 		return(TAILQ_NEXT(last, link));
  620: }
  621: 
  622: static int
  623: device_probe_child(device_t dev, device_t child)
  624: {
  625: 	devclass_t dc;
  626: 	driverlink_t best = 0;
  627: 	driverlink_t dl;
  628: 	int result, pri = 0;
  629: 	int hasclass = (child->devclass != 0);
  630: 
  631: 	dc = dev->devclass;
  632: 	if (!dc)
  633: 		panic("device_probe_child: parent device has no devclass");
  634: 
  635: 	if (child->state == DS_ALIVE)
  636: 		return(0);
  637: 
  638: 	for (; dc; dc = dc->parent) {
  639:     		for (dl = first_matching_driver(dc, child); dl;
  640: 		     dl = next_matching_driver(dc, child, dl)) {
  641: 			PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
  642: 			device_set_driver(child, dl->driver);
  643: 			if (!hasclass)
  644: 				device_set_devclass(child, dl->driver->name);
  645: 			result = DEVICE_PROBE(child);
  646: 			if (!hasclass)
  647: 				device_set_devclass(child, 0);
  648: 
  649: 			/*
  650: 			 * If the driver returns SUCCESS, there can be
  651: 			 * no higher match for this device.
  652: 			 */
  653: 			if (result == 0) {
  654: 				best = dl;
  655: 				pri = 0;
  656: 				break;
  657: 			}
  658: 
  659: 			/*
  660: 			 * The driver returned an error so it
  661: 			 * certainly doesn't match.
  662: 			 */
  663: 			if (result > 0) {
  664: 				device_set_driver(child, 0);
  665: 				continue;
  666: 			}
  667: 
  668: 			/*
  669: 			 * A priority lower than SUCCESS, remember the
  670: 			 * best matching driver. Initialise the value
  671: 			 * of pri for the first match.
  672: 			 */
  673: 			if (best == 0 || result > pri) {
  674: 				best = dl;
  675: 				pri = result;
  676: 				continue;
  677: 			}
  678: 	        }
  679: 		/*
  680: 	         * If we have unambiguous match in this devclass,
  681: 	         * don't look in the parent.
  682: 	         */
  683: 	        if (best && pri == 0)
  684: 	    	        break;
  685: 	}
  686: 
  687: 	/*
  688: 	 * If we found a driver, change state and initialise the devclass.
  689: 	 */
  690: 	if (best) {
  691: 		if (!child->devclass)
  692: 			device_set_devclass(child, best->driver->name);
  693: 		device_set_driver(child, best->driver);
  694: 		if (pri < 0) {
  695: 			/*
  696: 			 * A bit bogus. Call the probe method again to make
  697: 			 * sure that we have the right description.
  698: 			 */
  699: 			DEVICE_PROBE(child);
  700: 		}
  701: 		child->state = DS_ALIVE;
  702: 		return(0);
  703: 	}
  704: 
  705: 	return(ENXIO);
  706: }
  707: 
  708: device_t
  709: device_get_parent(device_t dev)
  710: {
  711: 	return dev->parent;
  712: }
  713: 
  714: int
  715: device_get_children(device_t dev, device_t **devlistp, int *devcountp)
  716: {
  717: 	int count;
  718: 	device_t child;
  719: 	device_t *list;
  720:     
  721: 	count = 0;
  722: 	TAILQ_FOREACH(child, &dev->children, link)
  723: 		count++;
  724: 
  725: 	list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO);
  726: 	if (!list)
  727: 		return(ENOMEM);
  728: 
  729: 	count = 0;
  730: 	TAILQ_FOREACH(child, &dev->children, link) {
  731: 		list[count] = child;
  732: 		count++;
  733: 	}
  734: 
  735: 	*devlistp = list;
  736: 	*devcountp = count;
  737: 
  738: 	return(0);
  739: }
  740: 
  741: driver_t *
  742: device_get_driver(device_t dev)
  743: {
  744: 	return(dev->driver);
  745: }
  746: 
  747: devclass_t
  748: device_get_devclass(device_t dev)
  749: {
  750: 	return(dev->devclass);
  751: }
  752: 
  753: const char *
  754: device_get_name(device_t dev)
  755: {
  756: 	if (dev->devclass)
  757: 		return devclass_get_name(dev->devclass);
  758: 	return(NULL);
  759: }
  760: 
  761: const char *
  762: device_get_nameunit(device_t dev)
  763: {
  764: 	return(dev->nameunit);
  765: }
  766: 
  767: int
  768: device_get_unit(device_t dev)
  769: {
  770: 	return(dev->unit);
  771: }
  772: 
  773: const char *
  774: device_get_desc(device_t dev)
  775: {
  776: 	return(dev->desc);
  777: }
  778: 
  779: uint32_t
  780: device_get_flags(device_t dev)
  781: {
  782: 	return(dev->devflags);
  783: }
  784: 
  785: int
  786: device_print_prettyname(device_t dev)
  787: {
  788: 	const char *name = device_get_name(dev);
  789: 
  790: 	if (name == 0)
  791: 		return printf("unknown: ");
  792: 	else
  793: 		return printf("%s%d: ", name, device_get_unit(dev));
  794: }
  795: 
  796: int
  797: device_printf(device_t dev, const char * fmt, ...)
  798: {
  799: 	__va_list ap;
  800: 	int retval;
  801: 
  802: 	retval = device_print_prettyname(dev);
  803: 	__va_start(ap, fmt);
  804: 	retval += vprintf(fmt, ap);
  805: 	__va_end(ap);
  806: 	return retval;
  807: }
  808: 
  809: static void
  810: device_set_desc_internal(device_t dev, const char* desc, int copy)
  811: {
  812: 	if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
  813: 		free(dev->desc, M_BUS);
  814: 		dev->flags &= ~DF_DESCMALLOCED;
  815: 		dev->desc = NULL;
  816: 	}
  817: 
  818: 	if (copy && desc) {
  819: 		dev->desc = malloc(strlen(desc) + 1, M_BUS, M_INTWAIT);
  820: 		if (dev->desc) {
  821: 			strcpy(dev->desc, desc);
  822: 			dev->flags |= DF_DESCMALLOCED;
  823: 		}
  824: 	} else
  825: 		/* Avoid a -Wcast-qual warning */
  826: 		dev->desc = (char *)(uintptr_t) desc;
  827: 
  828: #ifdef DEVICE_SYSCTLS
  829: 	{
  830: 		struct sysctl_oid *oid = &dev->oid[1];
  831: 		oid->oid_arg1 = dev->desc ? dev->desc : "";
  832: 		oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
  833: 	}
  834: #endif
  835: }
  836: 
  837: void
  838: device_set_desc(device_t dev, const char* desc)
  839: {
  840: 	device_set_desc_internal(dev, desc, FALSE);
  841: }
  842: 
  843: void
  844: device_set_desc_copy(device_t dev, const char* desc)
  845: {
  846: 	device_set_desc_internal(dev, desc, TRUE);
  847: }
  848: 
  849: void
  850: device_set_flags(device_t dev, uint32_t flags)
  851: {
  852: 	dev->devflags = flags;
  853: }
  854: 
  855: void *
  856: device_get_softc(device_t dev)
  857: {
  858: 	return dev->softc;
  859: }
  860: 
  861: void
  862: device_set_softc(device_t dev, void *softc)
  863: {
  864: 	if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
  865: 		free(dev->softc, M_BUS);
  866: 	dev->softc = softc;
  867: 	if (dev->softc)
  868: 		dev->flags |= DF_EXTERNALSOFTC;
  869: 	else
  870: 		dev->flags &= ~DF_EXTERNALSOFTC;
  871: }
  872: 
  873: void *
  874: device_get_ivars(device_t dev)
  875: {
  876: 	return dev->ivars;
  877: }
  878: 
  879: void
  880: device_set_ivars(device_t dev, void * ivars)
  881: {
  882: 	if (!dev)
  883: 		return;
  884: 
  885: 	dev->ivars = ivars;
  886: }
  887: 
  888: device_state_t
  889: device_get_state(device_t dev)
  890: {
  891: 	return(dev->state);
  892: }
  893: 
  894: void
  895: device_enable(device_t dev)
  896: {
  897: 	dev->flags |= DF_ENABLED;
  898: }
  899: 
  900: void
  901: device_disable(device_t dev)
  902: {
  903: 	dev->flags &= ~DF_ENABLED;
  904: }
  905: 
  906: /*
  907:  * YYY cannot block
  908:  */
  909: void
  910: device_busy(device_t dev)
  911: {
  912: 	if (dev->state < DS_ATTACHED)
  913: 		panic("device_busy: called for unattached device");
  914: 	if (dev->busy == 0 && dev->parent)
  915: 		device_busy(dev->parent);
  916: 	dev->busy++;
  917: 	dev->state = DS_BUSY;
  918: }
  919: 
  920: /*
  921:  * YYY cannot block
  922:  */
  923: void
  924: device_unbusy(device_t dev)
  925: {
  926: 	if (dev->state != DS_BUSY)
  927: 		panic("device_unbusy: called for non-busy device");
  928: 	dev->busy--;
  929: 	if (dev->busy == 0) {
  930: 		if (dev->parent)
  931: 			device_unbusy(dev->parent);
  932: 		dev->state = DS_ATTACHED;
  933: 	}
  934: }
  935: 
  936: void
  937: device_quiet(device_t dev)
  938: {
  939: 	dev->flags |= DF_QUIET;
  940: }
  941: 
  942: void
  943: device_verbose(device_t dev)
  944: {
  945: 	dev->flags &= ~DF_QUIET;
  946: }
  947: 
  948: int
  949: device_is_quiet(device_t dev)
  950: {
  951: 	return((dev->flags & DF_QUIET) != 0);
  952: }
  953: 
  954: int
  955: device_is_enabled(device_t dev)
  956: {
  957: 	return((dev->flags & DF_ENABLED) != 0);
  958: }
  959: 
  960: int
  961: device_is_alive(device_t dev)
  962: {
  963: 	return(dev->state >= DS_ALIVE);
  964: }
  965: 
  966: int
  967: device_is_attached(device_t dev)
  968: {
  969: 	return(dev->state >= DS_ATTACHED);
  970: }
  971: 
  972: int
  973: device_set_devclass(device_t dev, const char *classname)
  974: {
  975: 	devclass_t dc;
  976: 
  977: 	if (!classname) {
  978: 		if (dev->devclass)
  979: 			devclass_delete_device(dev->devclass, dev);
  980: 		return(0);
  981: 	}
  982: 
  983: 	if (dev->devclass) {
  984: 		printf("device_set_devclass: device class already set\n");
  985: 		return(EINVAL);
  986: 	}
  987: 
  988: 	dc = devclass_find_internal(classname, NULL, TRUE);
  989: 	if (!dc)
  990: 		return(ENOMEM);
  991: 
  992: 	return(devclass_add_device(dc, dev));
  993: }
  994: 
  995: int
  996: device_set_driver(device_t dev, driver_t *driver)
  997: {
  998: 	if (dev->state >= DS_ATTACHED)
  999: 		return(EBUSY);
 1000: 
 1001: 	if (dev->driver == driver)
 1002: 		return(0);
 1003: 
 1004: 	if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
 1005: 		free(dev->softc, M_BUS);
 1006: 		dev->softc = NULL;
 1007: 	}
 1008: 	kobj_delete((kobj_t) dev, 0);
 1009: 	dev->driver = driver;
 1010: 	if (driver) {
 1011: 		kobj_init((kobj_t) dev, (kobj_class_t) driver);
 1012: 		if (!(dev->flags & DF_EXTERNALSOFTC)) {
 1013: 			dev->softc = malloc(driver->size, M_BUS,
 1014: 					    M_INTWAIT | M_ZERO);
 1015: 			if (!dev->softc) {
 1016: 				kobj_delete((kobj_t)dev, 0);
 1017: 				kobj_init((kobj_t) dev, &null_class);
 1018: 				dev->driver = NULL;
 1019: 				return(ENOMEM);
 1020: 	    		}
 1021: 		}
 1022: 	} else
 1023: 		kobj_init((kobj_t) dev, &null_class);
 1024: 	return(0);
 1025: }
 1026: 
 1027: int
 1028: device_probe_and_attach(device_t dev)
 1029: {
 1030: 	device_t bus = dev->parent;
 1031: 	int error = 0;
 1032: 	int hasclass = (dev->devclass != 0);
 1033: 
 1034: 	if (dev->state >= DS_ALIVE)
 1035: 		return(0);
 1036: 
 1037: 	if ((dev->flags & DF_ENABLED) == 0) {
 1038: 		if (bootverbose) {
 1039: 			device_print_prettyname(dev);
 1040: 			printf("not probed (disabled)\n");
 1041: 		}
 1042: 		return(0);
 1043: 	}
 1044: 
 1045: 	error = device_probe_child(bus, dev);
 1046: 	if (error) {
 1047: 		if (!(dev->flags & DF_DONENOMATCH)) {
 1048: 			BUS_PROBE_NOMATCH(bus, dev);
 1049: 			dev->flags |= DF_DONENOMATCH;
 1050: 		}
 1051: 		return(error);
 1052: 	}
 1053: 	
 1054: 	if (!device_is_quiet(dev))
 1055: 		device_print_child(bus, dev);
 1056: 	error = DEVICE_ATTACH(dev);
 1057: 	if (!error)
 1058: 		dev->state = DS_ATTACHED;
 1059: 	else {
 1060: 		printf("device_probe_and_attach: %s%d attach returned %d\n",
 1061: 		       dev->driver->name, dev->unit, error);
 1062: 		/* Unset the class that was set in device_probe_child */
 1063: 		if (!hasclass)
 1064: 			device_set_devclass(dev, 0);
 1065: 		device_set_driver(dev, NULL);
 1066: 		dev->state = DS_NOTPRESENT;
 1067: 	}
 1068: 
 1069: 	return(error);
 1070: }
 1071: 
 1072: int
 1073: device_detach(device_t dev)
 1074: {
 1075: 	int error;
 1076: 
 1077: 	PDEBUG(("%s", DEVICENAME(dev)));
 1078: 	if (dev->state == DS_BUSY)
 1079: 		return(EBUSY);
 1080: 	if (dev->state != DS_ATTACHED)
 1081: 		return(0);
 1082: 
 1083: 	if ((error = DEVICE_DETACH(dev)) != 0)
 1084: 		return(error);
 1085: 	device_printf(dev, "detached\n");
 1086: 	if (dev->parent)
 1087: 		BUS_CHILD_DETACHED(dev->parent, dev);
 1088: 
 1089: 	if (!(dev->flags & DF_FIXEDCLASS))
 1090: 		devclass_delete_device(dev->devclass, dev);
 1091: 
 1092: 	dev->state = DS_NOTPRESENT;
 1093: 	device_set_driver(dev, NULL);
 1094: 
 1095: 	return(0);
 1096: }
 1097: 
 1098: int
 1099: device_shutdown(device_t dev)
 1100: {
 1101: 	if (dev->state < DS_ATTACHED)
 1102: 		return 0;
 1103: 	return DEVICE_SHUTDOWN(dev);
 1104: }
 1105: 
 1106: int
 1107: device_set_unit(device_t dev, int unit)
 1108: {
 1109: 	devclass_t dc;
 1110: 	int err;
 1111: 
 1112: 	dc = device_get_devclass(dev);
 1113: 	if (unit < dc->maxunit && dc->devices[unit])
 1114: 		return(EBUSY);
 1115: 	err = devclass_delete_device(dc, dev);
 1116: 	if (err)
 1117: 		return(err);
 1118: 	dev->unit = unit;
 1119: 	err = devclass_add_device(dc, dev);
 1120: 	return(err);
 1121: }
 1122: 
 1123: #ifdef DEVICE_SYSCTLS
 1124: 
 1125: /*
 1126:  * Sysctl nodes for devices.
 1127:  */
 1128: 
 1129: SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices");
 1130: 
 1131: static int
 1132: sysctl_handle_children(SYSCTL_HANDLER_ARGS)
 1133: {
 1134: 	device_t dev = arg1;
 1135: 	device_t child;
 1136: 	int first = 1, error = 0;
 1137: 
 1138: 	TAILQ_FOREACH(child, &dev->children, link)
 1139: 		if (child->nameunit) {
 1140: 			if (!first) {
 1141: 				error = SYSCTL_OUT(req, ",", 1);
 1142: 				if (error)
 1143: 					return error;
 1144: 			} else
 1145: 				first = 0;
 1146: 			error = SYSCTL_OUT(req, child->nameunit,
 1147: 					   strlen(child->nameunit));
 1148: 			if (error)
 1149: 				return(error);
 1150: 		}
 1151: 
 1152: 	error = SYSCTL_OUT(req, "", 1);
 1153: 
 1154: 	return(error);
 1155: }
 1156: 
 1157: static int
 1158: sysctl_handle_state(SYSCTL_HANDLER_ARGS)
 1159: {
 1160: 	device_t dev = arg1;
 1161: 
 1162: 	switch (dev->state) {
 1163: 	case DS_NOTPRESENT:
 1164: 		return SYSCTL_OUT(req, "notpresent", sizeof("notpresent"));
 1165: 	case DS_ALIVE:
 1166: 		return SYSCTL_OUT(req, "alive", sizeof("alive"));
 1167: 	case DS_ATTACHED:
 1168: 		return SYSCTL_OUT(req, "attached", sizeof("attached"));
 1169: 	case DS_BUSY:
 1170: 		return SYSCTL_OUT(req, "busy", sizeof("busy"));
 1171: 	default:
 1172: 		return (0);
 1173: 	}
 1174: }
 1175: 
 1176: static void
 1177: device_register_oids(device_t dev)
 1178: {
 1179: 	struct sysctl_oid* oid;
 1180: 
 1181: 	oid = &dev->oid[0];
 1182: 	bzero(oid, sizeof(*oid));
 1183: 	oid->oid_parent = &sysctl__hw_devices_children;
 1184: 	oid->oid_number = OID_AUTO;
 1185: 	oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW;
 1186: 	oid->oid_arg1 = &dev->oidlist[0];
 1187: 	oid->oid_arg2 = 0;
 1188: 	oid->oid_name = dev->nameunit;
 1189: 	oid->oid_handler = 0;
 1190: 	oid->oid_fmt = "N";
 1191: 	SLIST_INIT(&dev->oidlist[0]);
 1192: 	sysctl_register_oid(oid);
 1193: 
 1194: 	oid = &dev->oid[1];
 1195: 	bzero(oid, sizeof(*oid));
 1196: 	oid->oid_parent = &dev->oidlist[0];
 1197: 	oid->oid_number = OID_AUTO;
 1198: 	oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD;
 1199: 	oid->oid_arg1 = dev->desc ? dev->desc : "";
 1200: 	oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
 1201: 	oid->oid_name = "desc";
 1202: 	oid->oid_handler = sysctl_handle_string;
 1203: 	oid->oid_fmt = "A";
 1204: 	sysctl_register_oid(oid);
 1205: 
 1206: 	oid = &dev->oid[2];
 1207: 	bzero(oid, sizeof(*oid));
 1208: 	oid->oid_parent = &dev->oidlist[0];
 1209: 	oid->oid_number = OID_AUTO;
 1210: 	oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
 1211: 	oid->oid_arg1 = dev;
 1212: 	oid->oid_arg2 = 0;
 1213: 	oid->oid_name = "children";
 1214: 	oid->oid_handler = sysctl_handle_children;
 1215: 	oid->oid_fmt = "A";
 1216: 	sysctl_register_oid(oid);
 1217: 
 1218: 	oid = &dev->oid[3];
 1219: 	bzero(oid, sizeof(*oid));
 1220: 	oid->oid_parent = &dev->oidlist[0];
 1221: 	oid->oid_number = OID_AUTO;
 1222: 	oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
 1223: 	oid->oid_arg1 = dev;
 1224: 	oid->oid_arg2 = 0;
 1225: 	oid->oid_name = "state";
 1226: 	oid->oid_handler = sysctl_handle_state;
 1227: 	oid->oid_fmt = "A";
 1228: 	sysctl_register_oid(oid);
 1229: }
 1230: 
 1231: static void
 1232: device_unregister_oids(device_t dev)
 1233: {
 1234: 	sysctl_unregister_oid(&dev->oid[0]);
 1235: 	sysctl_unregister_oid(&dev->oid[1]);
 1236: 	sysctl_unregister_oid(&dev->oid[2]);
 1237: }
 1238: 
 1239: #endif
 1240: 
 1241: /*======================================*/
 1242: /*
 1243:  * Access functions for device resources.
 1244:  */
 1245: 
 1246: /* Supplied by config(8) in ioconf.c */
 1247: extern struct config_device config_devtab[];
 1248: extern int devtab_count;
 1249: 
 1250: /* Runtime version */
 1251: struct config_device *devtab = config_devtab;
 1252: 
 1253: static int
 1254: resource_new_name(const char *name, int unit)
 1255: {
 1256: 	struct config_device *new;
 1257: 
 1258: 	new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP,
 1259: 		     M_INTWAIT | M_ZERO);
 1260: 	if (new == NULL)
 1261: 		return(-1);
 1262: 	if (devtab && devtab_count > 0)
 1263: 		bcopy(devtab, new, devtab_count * sizeof(*new));
 1264: 	new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
 1265: 	if (new[devtab_count].name == NULL) {
 1266: 		free(new, M_TEMP);
 1267: 		return(-1);
 1268: 	}
 1269: 	strcpy(new[devtab_count].name, name);
 1270: 	new[devtab_count].unit = unit;
 1271: 	new[devtab_count].resource_count = 0;
 1272: 	new[devtab_count].resources = NULL;
 1273: 	devtab = new;
 1274: 	return devtab_count++;
 1275: }
 1276: 
 1277: static int
 1278: resource_new_resname(int j, const char *resname, resource_type type)
 1279: {
 1280: 	struct config_resource *new;
 1281: 	int i;
 1282: 
 1283: 	i = devtab[j].resource_count;
 1284: 	new = malloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
 1285: 	if (new == NULL)
 1286: 		return(-1);
 1287: 	if (devtab[j].resources && i > 0)
 1288: 		bcopy(devtab[j].resources, new, i * sizeof(*new));
 1289: 	new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
 1290: 	if (new[i].name == NULL) {
 1291: 		free(new, M_TEMP);
 1292: 		return(-1);
 1293: 	}
 1294: 	strcpy(new[i].name, resname);
 1295: 	new[i].type = type;
 1296: 	if (devtab[j].resources)
 1297: 		free(devtab[j].resources, M_TEMP);
 1298: 	devtab[j].resources = new;
 1299: 	devtab[j].resource_count = i + 1;
 1300: 	return(i);
 1301: }
 1302: 
 1303: static int
 1304: resource_match_string(int i, const char *resname, const char *value)
 1305: {
 1306: 	int j;
 1307: 	struct config_resource *res;
 1308: 
 1309: 	for (j = 0, res = devtab[i].resources;
 1310: 	     j < devtab[i].resource_count; j++, res++)
 1311: 		if (!strcmp(res->name, resname)
 1312: 		    && res->type == RES_STRING
 1313: 		    && !strcmp(res->u.stringval, value))
 1314: 			return(j);
 1315: 	return(-1);
 1316: }
 1317: 
 1318: static int
 1319: resource_find(const char *name, int unit, const char *resname, 
 1320: 	      struct config_resource **result)
 1321: {
 1322: 	int i, j;
 1323: 	struct config_resource *res;
 1324: 
 1325: 	/*
 1326: 	 * First check specific instances, then generic.
 1327: 	 */
 1328: 	for (i = 0; i < devtab_count; i++) {
 1329: 		if (devtab[i].unit < 0)
 1330: 			continue;
 1331: 		if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
 1332: 			res = devtab[i].resources;
 1333: 			for (j = 0; j < devtab[i].resource_count; j++, res++)
 1334: 				if (!strcmp(res->name, resname)) {
 1335: 					*result = res;
 1336: 					return(0);
 1337: 				}
 1338: 		}
 1339: 	}
 1340: 	for (i = 0; i < devtab_count; i++) {
 1341: 		if (devtab[i].unit >= 0)
 1342: 			continue;
 1343: 		/* XXX should this `&& devtab[i].unit == unit' be here? */
 1344: 		/* XXX if so, then the generic match does nothing */
 1345: 		if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
 1346: 			res = devtab[i].resources;
 1347: 			for (j = 0; j < devtab[i].resource_count; j++, res++)
 1348: 				if (!strcmp(res->name, resname)) {
 1349: 					*result = res;
 1350: 					return(0);
 1351: 				}
 1352: 		}
 1353: 	}
 1354: 	return(ENOENT);
 1355: }
 1356: 
 1357: int
 1358: resource_int_value(const char *name, int unit, const char *resname, int *result)
 1359: {
 1360: 	int error;
 1361: 	struct config_resource *res;
 1362: 
 1363: 	if ((error = resource_find(name, unit, resname, &res)) != 0)
 1364: 		return(error);
 1365: 	if (res->type != RES_INT)
 1366: 		return(EFTYPE);
 1367: 	*result = res->u.intval;
 1368: 	return(0);
 1369: }
 1370: 
 1371: int
 1372: resource_long_value(const char *name, int unit, const char *resname,
 1373: 		    long *result)
 1374: {
 1375: 	int error;
 1376: 	struct config_resource *res;
 1377: 
 1378: 	if ((error = resource_find(name, unit, resname, &res)) != 0)
 1379: 		return(error);
 1380: 	if (res->type != RES_LONG)
 1381: 		return(EFTYPE);
 1382: 	*result = res->u.longval;
 1383: 	return(0);
 1384: }
 1385: 
 1386: int
 1387: resource_string_value(const char *name, int unit, const char *resname,
 1388: 		      char **result)
 1389: {
 1390: 	int error;
 1391: 	struct config_resource *res;
 1392: 
 1393: 	if ((error = resource_find(name, unit, resname, &res)) != 0)
 1394: 		return(error);
 1395: 	if (res->type != RES_STRING)
 1396: 		return(EFTYPE);
 1397: 	*result = res->u.stringval;
 1398: 	return(0);
 1399: }
 1400: 
 1401: int
 1402: resource_query_string(int i, const char *resname, const char *value)
 1403: {
 1404: 	if (i < 0)
 1405: 		i = 0;
 1406: 	else
 1407: 		i = i + 1;
 1408: 	for (; i < devtab_count; i++)
 1409: 		if (resource_match_string(i, resname, value) >= 0)
 1410: 			return(i);
 1411: 	return(-1);
 1412: }
 1413: 
 1414: int
 1415: resource_locate(int i, const char *resname)
 1416: {
 1417: 	if (i < 0)
 1418: 		i = 0;
 1419: 	else
 1420: 		i = i + 1;
 1421: 	for (; i < devtab_count; i++)
 1422: 		if (!strcmp(devtab[i].name, resname))
 1423: 			return(i);
 1424: 	return(-1);
 1425: }
 1426: 
 1427: int
 1428: resource_count(void)
 1429: {
 1430: 	return(devtab_count);
 1431: }
 1432: 
 1433: char *
 1434: resource_query_name(int i)
 1435: {
 1436: 	return(devtab[i].name);
 1437: }
 1438: 
 1439: int
 1440: resource_query_unit(int i)
 1441: {
 1442: 	return(devtab[i].unit);
 1443: }
 1444: 
 1445: static int
 1446: resource_create(const char *name, int unit, const char *resname,
 1447: 		resource_type type, struct config_resource **result)
 1448: {
 1449: 	int i, j;
 1450: 	struct config_resource *res = NULL;
 1451: 
 1452: 	for (i = 0; i < devtab_count; i++)
 1453: 		if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
 1454: 			res = devtab[i].resources;
 1455: 			break;
 1456: 		}
 1457: 	if (res == NULL) {
 1458: 		i = resource_new_name(name, unit);
 1459: 		if (i < 0)
 1460: 			return(ENOMEM);
 1461: 		res = devtab[i].resources;
 1462: 	}
 1463: 	for (j = 0; j < devtab[i].resource_count; j++, res++)
 1464: 		if (!strcmp(res->name, resname)) {
 1465: 			*result = res;
 1466: 			return(0);
 1467: 		}
 1468: 	j = resource_new_resname(i, resname, type);
 1469: 	if (j < 0)
 1470: 		return(ENOMEM);
 1471: 	res = &devtab[i].resources[j];
 1472: 	*result = res;
 1473: 	return(0);
 1474: }
 1475: 
 1476: int
 1477: resource_set_int(const char *name, int unit, const char *resname, int value)
 1478: {
 1479: 	int error;
 1480: 	struct config_resource *res;
 1481: 
 1482: 	error = resource_create(name, unit, resname, RES_INT, &res);
 1483: 	if (error)
 1484: 		return(error);
 1485: 	if (res->type != RES_INT)
 1486: 		return(EFTYPE);
 1487: 	res->u.intval = value;
 1488: 	return(0);
 1489: }
 1490: 
 1491: int
 1492: resource_set_long(const char *name, int unit, const char *resname, long value)
 1493: {
 1494: 	int error;
 1495: 	struct config_resource *res;
 1496: 
 1497: 	error = resource_create(name, unit, resname, RES_LONG, &res);
 1498: 	if (error)
 1499: 		return(error);
 1500: 	if (res->type != RES_LONG)
 1501: 		return(EFTYPE);
 1502: 	res->u.longval = value;
 1503: 	return(0);
 1504: }
 1505: 
 1506: int
 1507: resource_set_string(const char *name, int unit, const char *resname,
 1508: 		    const char *value)
 1509: {
 1510: 	int error;
 1511: 	struct config_resource *res;
 1512: 
 1513: 	error = resource_create(name, unit, resname, RES_STRING, &res);
 1514: 	if (error)
 1515: 		return(error);
 1516: 	if (res->type != RES_STRING)
 1517: 		return(EFTYPE);
 1518: 	if (res->u.stringval)
 1519: 		free(res->u.stringval, M_TEMP);
 1520: 	res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
 1521: 	if (res->u.stringval == NULL)
 1522: 		return(ENOMEM);
 1523: 	strcpy(res->u.stringval, value);
 1524: 	return(0);
 1525: }
 1526: 
 1527: static void
 1528: resource_cfgload(void *dummy __unused)
 1529: {
 1530: 	struct config_resource *res, *cfgres;
 1531: 	int i, j;
 1532: 	int error;
 1533: 	char *name, *resname;
 1534: 	int unit;
 1535: 	resource_type type;
 1536: 	char *stringval;
 1537: 	int config_devtab_count;
 1538: 
 1539: 	config_devtab_count = devtab_count;
 1540: 	devtab = NULL;
 1541: 	devtab_count = 0;
 1542: 
 1543: 	for (i = 0; i < config_devtab_count; i++) {
 1544: 		name = config_devtab[i].name;
 1545: 		unit = config_devtab[i].unit;
 1546: 
 1547: 		for (j = 0; j < config_devtab[i].resource_count; j++) {
 1548: 			cfgres = config_devtab[i].resources;
 1549: 			resname = cfgres[j].name;
 1550: 			type = cfgres[j].type;
 1551: 			error = resource_create(name, unit, resname, type,
 1552: 						&res);
 1553: 			if (error) {
 1554: 				printf("create resource %s%d: error %d\n",
 1555: 					name, unit, error);
 1556: 				continue;
 1557: 			}
 1558: 			if (res->type != type) {
 1559: 				printf("type mismatch %s%d: %d != %d\n",
 1560: 					name, unit, res->type, type);
 1561: 				continue;
 1562: 			}
 1563: 			switch (type) {
 1564: 			case RES_INT:
 1565: 				res->u.intval = cfgres[j].u.intval;
 1566: 				break;
 1567: 			case RES_LONG:
 1568: 				res->u.longval = cfgres[j].u.longval;
 1569: 				break;
 1570: 			case RES_STRING:
 1571: 				if (res->u.stringval)
 1572: 					free(res->u.stringval, M_TEMP);
 1573: 				stringval = cfgres[j].u.stringval;
 1574: 				res->u.stringval = malloc(strlen(stringval) + 1,
 1575: 							  M_TEMP, M_INTWAIT);
 1576: 				if (res->u.stringval == NULL)
 1577: 					break;
 1578: 				strcpy(res->u.stringval, stringval);
 1579: 				break;
 1580: 			default:
 1581: 				panic("unknown resource type %d\n", type);
 1582: 			}
 1583: 		}
 1584: 	}
 1585: }
 1586: SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0)
 1587: 
 1588: 
 1589: /*======================================*/
 1590: /*
 1591:  * Some useful method implementations to make life easier for bus drivers.
 1592:  */
 1593: 
 1594: void
 1595: resource_list_init(struct resource_list *rl)
 1596: {
 1597: 	SLIST_INIT(rl);
 1598: }
 1599: 
 1600: void
 1601: resource_list_free(struct resource_list *rl)
 1602: {
 1603: 	struct resource_list_entry *rle;
 1604: 
 1605: 	while ((rle = SLIST_FIRST(rl)) != NULL) {
 1606: 		if (rle->res)
 1607: 			panic("resource_list_free: resource entry is busy");
 1608: 		SLIST_REMOVE_HEAD(rl, link);
 1609: 		free(rle, M_BUS);
 1610: 	}
 1611: }
 1612: 
 1613: void
 1614: resource_list_add(struct resource_list *rl,
 1615: 		  int type, int rid,
 1616: 		  u_long start, u_long end, u_long count)
 1617: {
 1618: 	struct resource_list_entry *rle;
 1619: 
 1620: 	rle = resource_list_find(rl, type, rid);
 1621: 	if (rle == NULL) {
 1622: 		rle = malloc(sizeof(struct resource_list_entry), M_BUS,
 1623: 			     M_INTWAIT);
 1624: 		if (!rle)
 1625: 			panic("resource_list_add: can't record entry");
 1626: 		SLIST_INSERT_HEAD(rl, rle, link);
 1627: 		rle->type = type;
 1628: 		rle->rid = rid;
 1629: 		rle->res = NULL;
 1630: 	}
 1631: 
 1632: 	if (rle->res)
 1633: 		panic("resource_list_add: resource entry is busy");
 1634: 
 1635: 	rle->start = start;
 1636: 	rle->end = end;
 1637: 	rle->count = count;
 1638: }
 1639: 
 1640: struct resource_list_entry*
 1641: resource_list_find(struct resource_list *rl,
 1642: 		   int type, int rid)
 1643: {
 1644: 	struct resource_list_entry *rle;
 1645: 
 1646: 	SLIST_FOREACH(rle, rl, link)
 1647: 		if (rle->type == type && rle->rid == rid)
 1648: 			return(rle);
 1649: 	return(NULL);
 1650: }
 1651: 
 1652: void
 1653: resource_list_delete(struct resource_list *rl,
 1654: 		     int type, int rid)
 1655: {
 1656: 	struct resource_list_entry *rle = resource_list_find(rl, type, rid);
 1657: 
 1658: 	if (rle) {
 1659: 		SLIST_REMOVE(rl, rle, resource_list_entry, link);
 1660: 		free(rle, M_BUS);
 1661: 	}
 1662: }
 1663: 
 1664: struct resource *
 1665: resource_list_alloc(struct resource_list *rl,
 1666: 		    device_t bus, device_t child,
 1667: 		    int type, int *rid,
 1668: 		    u_long start, u_long end,
 1669: 		    u_long count, u_int flags)
 1670: {
 1671: 	struct resource_list_entry *rle = 0;
 1672: 	int passthrough = (device_get_parent(child) != bus);
 1673: 	int isdefault = (start == 0UL && end == ~0UL);
 1674: 
 1675: 	if (passthrough) {
 1676: 		return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
 1677: 					  type, rid,
 1678: 					  start, end, count, flags));
 1679: 	}
 1680: 
 1681: 	rle = resource_list_find(rl, type, *rid);
 1682: 
 1683: 	if (!rle)
 1684: 		return(0);		/* no resource of that type/rid */
 1685: 	if (rle->res)
 1686: 		panic("resource_list_alloc: resource entry is busy");
 1687: 
 1688: 	if (isdefault) {
 1689: 		start = rle->start;
 1690: 		count = max(count, rle->count);
 1691: 		end = max(rle->end, start + count - 1);
 1692: 	}
 1693: 
 1694: 	rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
 1695: 				      type, rid, start, end, count, flags);
 1696: 
 1697: 	/*
 1698: 	 * Record the new range.
 1699: 	 */
 1700: 	if (rle->res) {
 1701: 		rle->start = rman_get_start(rle->res);
 1702: 		rle->end = rman_get_end(rle->res);
 1703: 		rle->count = count;
 1704: 	}
 1705: 
 1706: 	return(rle->res);
 1707: }
 1708: 
 1709: int
 1710: resource_list_release(struct resource_list *rl,
 1711: 		      device_t bus, device_t child,
 1712: 		      int type, int rid, struct resource *res)
 1713: {
 1714: 	struct resource_list_entry *rle = 0;
 1715: 	int passthrough = (device_get_parent(child) != bus);
 1716: 	int error;
 1717: 
 1718: 	if (passthrough) {
 1719: 		return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
 1720: 					    type, rid, res));
 1721: 	}
 1722: 
 1723: 	rle = resource_list_find(rl, type, rid);
 1724: 
 1725: 	if (!rle)
 1726: 		panic("resource_list_release: can't find resource");
 1727: 	if (!rle->res)
 1728: 		panic("resource_list_release: resource entry is not busy");
 1729: 
 1730: 	error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
 1731: 				     type, rid, res);
 1732: 	if (error)
 1733: 		return(error);
 1734: 
 1735: 	rle->res = NULL;
 1736: 	return(0);
 1737: }
 1738: 
 1739: int
 1740: resource_list_print_type(struct resource_list *rl, const char *name, int type,
 1741: 			 const char *format)
 1742: {
 1743: 	struct resource_list_entry *rle;
 1744: 	int printed, retval;
 1745: 
 1746: 	printed = 0;
 1747: 	retval = 0;
 1748: 	/* Yes, this is kinda cheating */
 1749: 	SLIST_FOREACH(rle, rl, link) {
 1750: 		if (rle->type == type) {
 1751: 			if (printed == 0)
 1752: 				retval += printf(" %s ", name);
 1753: 			else
 1754: 				retval += printf(",");
 1755: 			printed++;
 1756: 			retval += printf(format, rle->start);
 1757: 			if (rle->count > 1) {
 1758: 				retval += printf("-");
 1759: 				retval += printf(format, rle->start +
 1760: 						 rle->count - 1);
 1761: 			}
 1762: 		}
 1763: 	}
 1764: 	return(retval);
 1765: }
 1766: 
 1767: /*
 1768:  * Call DEVICE_IDENTIFY for each driver.
 1769:  */
 1770: int
 1771: bus_generic_probe(device_t dev)
 1772: {
 1773: 	devclass_t dc = dev->devclass;
 1774: 	driverlink_t dl;
 1775: 
 1776: 	TAILQ_FOREACH(dl, &dc->drivers, link)
 1777: 		DEVICE_IDENTIFY(dl->driver, dev);
 1778: 
 1779: 	return(0);
 1780: }
 1781: 
 1782: int
 1783: bus_generic_attach(device_t dev)
 1784: {
 1785: 	device_t child;
 1786: 
 1787: 	TAILQ_FOREACH(child, &dev->children, link)
 1788: 		device_probe_and_attach(child);
 1789: 
 1790: 	return(0);
 1791: }
 1792: 
 1793: int
 1794: bus_generic_detach(device_t dev)
 1795: {
 1796: 	device_t child;
 1797: 	int error;
 1798: 
 1799: 	if (dev->state != DS_ATTACHED)
 1800: 		return(EBUSY);
 1801: 
 1802: 	TAILQ_FOREACH(child, &dev->children, link)
 1803: 		if ((error = device_detach(child)) != 0)
 1804: 			return(error);
 1805: 
 1806: 	return 0;
 1807: }
 1808: 
 1809: int
 1810: bus_generic_shutdown(device_t dev)
 1811: {
 1812: 	device_t child;
 1813: 
 1814: 	TAILQ_FOREACH(child, &dev->children, link)
 1815: 		device_shutdown(child);
 1816: 
 1817: 	return(0);
 1818: }
 1819: 
 1820: int
 1821: bus_generic_suspend(device_t dev)
 1822: {
 1823: 	int error;
 1824: 	device_t child, child2;
 1825: 
 1826: 	TAILQ_FOREACH(child, &dev->children, link) {
 1827: 		error = DEVICE_SUSPEND(child);
 1828: 		if (error) {
 1829: 			for (child2 = TAILQ_FIRST(&dev->children);
 1830: 			     child2 && child2 != child; 
 1831: 			     child2 = TAILQ_NEXT(child2, link))
 1832: 				DEVICE_RESUME(child2);
 1833: 			return(error);
 1834: 		}
 1835: 	}
 1836: 	return(0);
 1837: }
 1838: 
 1839: int
 1840: bus_generic_resume(device_t dev)
 1841: {
 1842: 	device_t child;
 1843: 
 1844: 	TAILQ_FOREACH(child, &dev->children, link)
 1845: 		DEVICE_RESUME(child);
 1846: 		/* if resume fails, there's nothing we can usefully do... */
 1847: 
 1848: 	return(0);
 1849: }
 1850: 
 1851: int
 1852: bus_print_child_header(device_t dev, device_t child)
 1853: {
 1854: 	int retval = 0;
 1855: 
 1856: 	if (device_get_desc(child))
 1857: 		retval += device_printf(child, "<%s>", device_get_desc(child));
 1858: 	else
 1859: 		retval += printf("%s", device_get_nameunit(child));
 1860: 
 1861: 	return(retval);
 1862: }
 1863: 
 1864: int
 1865: bus_print_child_footer(device_t dev, device_t child)
 1866: {
 1867: 	return(printf(" on %s\n", device_get_nameunit(dev)));
 1868: }
 1869: 
 1870: int
 1871: bus_generic_print_child(device_t dev, device_t child)
 1872: {
 1873: 	int retval = 0;
 1874: 
 1875: 	retval += bus_print_child_header(dev, child);
 1876: 	retval += bus_print_child_footer(dev, child);
 1877: 
 1878: 	return(retval);
 1879: }
 1880: 
 1881: int
 1882: bus_generic_read_ivar(device_t dev, device_t child, int index, 
 1883: 		      uintptr_t * result)
 1884: {
 1885:     return(ENOENT);
 1886: }
 1887: 
 1888: int
 1889: bus_generic_write_ivar(device_t dev, device_t child, int index, 
 1890: 		       uintptr_t value)
 1891: {
 1892:     return(ENOENT);
 1893: }
 1894: 
 1895: struct resource_list *
 1896: bus_generic_get_resource_list(device_t dev, device_t child)
 1897: {
 1898:     return(NULL);
 1899: }
 1900: 
 1901: void
 1902: bus_generic_driver_added(device_t dev, driver_t *driver)
 1903: {
 1904: 	device_t child;
 1905: 
 1906: 	DEVICE_IDENTIFY(driver, dev);
 1907: 	TAILQ_FOREACH(child, &dev->children, link)
 1908: 		if (child->state == DS_NOTPRESENT)
 1909: 			device_probe_and_attach(child);
 1910: }
 1911: 
 1912: int
 1913: bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 
 1914: 		       int flags, driver_intr_t *intr, void *arg,
 1915: 		       void **cookiep)
 1916: {
 1917: 	/* Propagate up the bus hierarchy until someone handles it. */
 1918: 	if (dev->parent)
 1919: 		return(BUS_SETUP_INTR(dev->parent, child, irq, flags,
 1920: 				      intr, arg, cookiep));
 1921: 	else
 1922: 		return(EINVAL);
 1923: }
 1924: 
 1925: int
 1926: bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
 1927: 			  void *cookie)
 1928: {
 1929: 	/* Propagate up the bus hierarchy until someone handles it. */
 1930: 	if (dev->parent)
 1931: 		return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
 1932: 	else
 1933: 		return(EINVAL);
 1934: }
 1935: 
 1936: struct resource *
 1937: bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
 1938: 			   u_long start, u_long end, u_long count, u_int flags)
 1939: {
 1940: 	/* Propagate up the bus hierarchy until someone handles it. */
 1941: 	if (dev->parent)
 1942: 		return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 
 1943: 					   start, end, count, flags));
 1944: 	else
 1945: 		return(NULL);
 1946: }
 1947: 
 1948: int
 1949: bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
 1950: 			     struct resource *r)
 1951: {
 1952: 	/* Propagate up the bus hierarchy until someone handles it. */
 1953: 	if (dev->parent)
 1954: 		return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
 1955: 	else
 1956: 		return(EINVAL);
 1957: }
 1958: 
 1959: int
 1960: bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
 1961: 			      struct resource *r)
 1962: {
 1963: 	/* Propagate up the bus hierarchy until someone handles it. */
 1964: 	if (dev->parent)
 1965: 		return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
 1966: 	else
 1967: 		return(EINVAL);
 1968: }
 1969: 
 1970: int
 1971: bus_generic_deactivate_resource(device_t dev, device_t child, int type,
 1972: 				int rid, struct resource *r)
 1973: {
 1974: 	/* Propagate up the bus hierarchy until someone handles it. */
 1975: 	if (dev->parent)
 1976: 		return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
 1977: 					       r));
 1978: 	else
 1979: 		return(EINVAL);
 1980: }
 1981: 
 1982: int
 1983: bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig,
 1984:     enum intr_polarity pol)
 1985: {
 1986: 	/* Propagate up the bus hierarchy until someone handles it. */
 1987: 	if (dev->parent)
 1988: 		return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol));
 1989: 	else
 1990: 		return(EINVAL);
 1991: }
 1992: 
 1993: int
 1994: bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
 1995:     u_long *startp, u_long *countp)
 1996: {
 1997: 	struct resource_list *rl = NULL;
 1998: 	struct resource_list_entry *rle = NULL;
 1999: 
 2000: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2001: 	if (!rl)
 2002: 		return(EINVAL);
 2003: 
 2004: 	rle = resource_list_find(rl, type, rid);
 2005: 	if (!rle)
 2006: 		return(ENOENT);
 2007: 
 2008: 	if (startp)
 2009: 		*startp = rle->start;
 2010: 	if (countp)
 2011: 		*countp = rle->count;
 2012: 
 2013: 	return(0);
 2014: }
 2015: 
 2016: int
 2017: bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
 2018:     u_long start, u_long count)
 2019: {
 2020: 	struct resource_list *rl = NULL;
 2021: 
 2022: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2023: 	if (!rl)
 2024: 		return(EINVAL);
 2025: 
 2026: 	resource_list_add(rl, type, rid, start, (start + count - 1), count);
 2027: 
 2028: 	return(0);
 2029: }
 2030: 
 2031: void
 2032: bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
 2033: {
 2034: 	struct resource_list *rl = NULL;
 2035: 
 2036: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2037: 	if (!rl)
 2038: 		return;
 2039: 
 2040: 	resource_list_delete(rl, type, rid);
 2041: }
 2042: 
 2043: int
 2044: bus_generic_rl_release_resource(device_t dev, device_t child, int type,
 2045:     int rid, struct resource *r)
 2046: {
 2047: 	struct resource_list *rl = NULL;
 2048: 
 2049: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2050: 	if (!rl)
 2051: 		return(EINVAL);
 2052: 
 2053: 	return(resource_list_release(rl, dev, child, type, rid, r));
 2054: }
 2055: 
 2056: struct resource *
 2057: bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
 2058:     int *rid, u_long start, u_long end, u_long count, u_int flags)
 2059: {
 2060: 	struct resource_list *rl = NULL;
 2061: 
 2062: 	rl = BUS_GET_RESOURCE_LIST(dev, child);
 2063: 	if (!rl)
 2064: 		return(NULL);
 2065: 
 2066: 	return(resource_list_alloc(rl, dev, child, type, rid,
 2067: 	    start, end, count, flags));
 2068: }
 2069: 
 2070: int
 2071: bus_generic_child_present(device_t bus, device_t child)
 2072: {
 2073: 	return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
 2074: }
 2075: 
 2076: 
 2077: /*
 2078:  * Some convenience functions to make it easier for drivers to use the
 2079:  * resource-management functions.  All these really do is hide the
 2080:  * indirection through the parent's method table, making for slightly
 2081:  * less-wordy code.  In the future, it might make sense for this code
 2082:  * to maintain some sort of a list of resources allocated by each device.
 2083:  */
 2084: struct resource *
 2085: bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
 2086: 		   u_long count, u_int flags)
 2087: {
 2088: 	if (dev->parent == 0)
 2089: 		return(0);
 2090: 	return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
 2091: 				  count, flags));
 2092: }
 2093: 
 2094: int
 2095: bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
 2096: {
 2097: 	if (dev->parent == 0)
 2098: 		return(EINVAL);
 2099: 	return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
 2100: }
 2101: 
 2102: int
 2103: bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
 2104: {
 2105: 	if (dev->parent == 0)
 2106: 		return(EINVAL);
 2107: 	return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
 2108: }
 2109: 
 2110: int
 2111: bus_release_resource(device_t dev, int type, int rid, struct resource *r)
 2112: {
 2113: 	if (dev->parent == 0)
 2114: 		return(EINVAL);
 2115: 	return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
 2116: }
 2117: 
 2118: int
 2119: bus_setup_intr(device_t dev, struct resource *r, int flags,
 2120: 	       driver_intr_t handler, void *arg, void **cookiep)
 2121: {
 2122: 	if (dev->parent == 0)
 2123: 		return(EINVAL);
 2124: 	return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
 2125: 	       cookiep));
 2126: }
 2127: 
 2128: int
 2129: bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
 2130: {
 2131: 	if (dev->parent == 0)
 2132: 		return(EINVAL);
 2133: 	return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
 2134: }
 2135: 
 2136: int
 2137: bus_set_resource(device_t dev, int type, int rid,
 2138: 		 u_long start, u_long count)
 2139: {
 2140: 	return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2141: 				start, count));
 2142: }
 2143: 
 2144: int
 2145: bus_get_resource(device_t dev, int type, int rid,
 2146: 		 u_long *startp, u_long *countp)
 2147: {
 2148: 	return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2149: 				startp, countp));
 2150: }
 2151: 
 2152: u_long
 2153: bus_get_resource_start(device_t dev, int type, int rid)
 2154: {
 2155: 	u_long start, count;
 2156: 	int error;
 2157: 
 2158: 	error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2159: 				 &start, &count);
 2160: 	if (error)
 2161: 		return(0);
 2162: 	return(start);
 2163: }
 2164: 
 2165: u_long
 2166: bus_get_resource_count(device_t dev, int type, int rid)
 2167: {
 2168: 	u_long start, count;
 2169: 	int error;
 2170: 
 2171: 	error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
 2172: 				 &start, &count);
 2173: 	if (error)
 2174: 		return(0);
 2175: 	return(count);
 2176: }
 2177: 
 2178: void
 2179: bus_delete_resource(device_t dev, int type, int rid)
 2180: {
 2181: 	BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
 2182: }
 2183: 
 2184: int
 2185: bus_child_present(device_t child)
 2186: {
 2187: 	return (BUS_CHILD_PRESENT(device_get_parent(child), child));
 2188: }
 2189: 
 2190: int
 2191: bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
 2192: {
 2193: 	device_t parent;
 2194: 
 2195: 	parent = device_get_parent(child);
 2196: 	if (parent == NULL) {
 2197: 		*buf = '\0';
 2198: 		return (0);
 2199: 	}
 2200: 	return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
 2201: }
 2202: 
 2203: int
 2204: bus_child_location_str(device_t child, char *buf, size_t buflen)
 2205: {
 2206: 	device_t parent;
 2207: 
 2208: 	parent = device_get_parent(child);
 2209: 	if (parent == NULL) {
 2210: 		*buf = '\0';
 2211: 		return (0);
 2212: 	}
 2213: 	return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
 2214: }
 2215: 
 2216: static int
 2217: root_print_child(device_t dev, device_t child)
 2218: {
 2219: 	return(0);
 2220: }
 2221: 
 2222: static int
 2223: root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
 2224: 		void **cookiep)
 2225: {
 2226: 	/*
 2227: 	 * If an interrupt mapping gets to here something bad has happened.
 2228: 	 */
 2229: 	panic("root_setup_intr");
 2230: }
 2231: 
 2232: /*
 2233:  * If we get here, assume that the device is permanant and really is
 2234:  * present in the system.  Removable bus drivers are expected to intercept
 2235:  * this call long before it gets here.  We return -1 so that drivers that
 2236:  * really care can check vs -1 or some ERRNO returned higher in the food
 2237:  * chain.
 2238:  */
 2239: static int
 2240: root_child_present(device_t dev, device_t child)
 2241: {
 2242: 	return(-1);
 2243: }
 2244: 
 2245: /*
 2246:  * XXX NOTE! other defaults may be set in bus_if.m
 2247:  */
 2248: static kobj_method_t root_methods[] = {
 2249: 	/* Device interface */
 2250: 	KOBJMETHOD(device_shutdown,	bus_generic_shutdown),
 2251: 	KOBJMETHOD(device_suspend,	bus_generic_suspend),
 2252: 	KOBJMETHOD(device_resume,	bus_generic_resume),
 2253: 
 2254: 	/* Bus interface */
 2255: 	KOBJMETHOD(bus_print_child,	root_print_child),
 2256: 	KOBJMETHOD(bus_read_ivar,	bus_generic_read_ivar),
 2257: 	KOBJMETHOD(bus_write_ivar,	bus_generic_write_ivar),
 2258: 	KOBJMETHOD(bus_setup_intr,	root_setup_intr),
 2259: 	KOBJMETHOD(bus_child_present,   root_child_present),
 2260: 
 2261: 	{ 0, 0 }
 2262: };
 2263: 
 2264: static driver_t root_driver = {
 2265: 	"root",
 2266: 	root_methods,
 2267: 	1,			/* no softc */
 2268: };
 2269: 
 2270: device_t	root_bus;
 2271: devclass_t	root_devclass;
 2272: 
 2273: static int
 2274: root_bus_module_handler(module_t mod, int what, void* arg)
 2275: {
 2276: 	switch (what) {
 2277: 	case MOD_LOAD:
 2278: 		root_bus = make_device(NULL, "root", 0);
 2279: 		root_bus->desc = "System root bus";
 2280: 		kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
 2281: 		root_bus->driver = &root_driver;
 2282: 		root_bus->state = DS_ATTACHED;
 2283: 		root_devclass = devclass_find_internal("root", NULL, FALSE);
 2284: 		return(0);
 2285: 
 2286: 	case MOD_SHUTDOWN:
 2287: 		device_shutdown(root_bus);
 2288: 		return(0);
 2289: 	default:
 2290: 		return(0);
 2291: 	}
 2292: }
 2293: 
 2294: static moduledata_t root_bus_mod = {
 2295: 	"rootbus",
 2296: 	root_bus_module_handler,
 2297: 	0
 2298: };
 2299: DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
 2300: 
 2301: void
 2302: root_bus_configure(void)
 2303: {
 2304: 	device_t dev;
 2305: 
 2306: 	PDEBUG(("."));
 2307: 
 2308: 	TAILQ_FOREACH(dev, &root_bus->children, link)
 2309: 		device_probe_and_attach(dev);
 2310: }
 2311: 
 2312: int
 2313: driver_module_handler(module_t mod, int what, void *arg)
 2314: {
 2315: 	int error;
 2316: 	struct driver_module_data *dmd;
 2317: 	devclass_t bus_devclass;
 2318: 	kobj_class_t driver;
 2319:         const char *parentname;
 2320: 
 2321: 	dmd = (struct driver_module_data *)arg;
 2322: 	bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
 2323: 	error = 0;
 2324: 
 2325: 	switch (what) {
 2326: 	case MOD_LOAD:
 2327: 		if (dmd->dmd_chainevh)
 2328: 			error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
 2329: 
 2330: 		driver = dmd->dmd_driver;
 2331: 		PDEBUG(("Loading module: driver %s on bus %s",
 2332: 		        DRIVERNAME(driver), dmd->dmd_busname));
 2333: 		error = devclass_add_driver(bus_devclass, driver);
 2334: 		if (error)
 2335: 			break;
 2336: 
 2337: 		/*
 2338: 		 * If the driver has any base classes, make the
 2339: 		 * devclass inherit from the devclass of the driver's
 2340: 		 * first base class. This will allow the system to
 2341: 		 * search for drivers in both devclasses for children
 2342: 		 * of a device using this driver.
 2343: 		 */
 2344: 		if (driver->baseclasses)
 2345: 			parentname = driver->baseclasses[0]->name;
 2346: 		else
 2347: 			parentname = NULL;
 2348: 	    	*dmd->dmd_devclass = devclass_find_internal(driver->name,
 2349: 							    parentname, TRUE);
 2350: 		break;
 2351: 
 2352: 	case MOD_UNLOAD:
 2353: 		PDEBUG(("Unloading module: driver %s from bus %s",
 2354: 			DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
 2355: 		error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
 2356: 
 2357: 		if (!error && dmd->dmd_chainevh)
 2358: 			error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
 2359: 		break;
 2360: 	}
 2361: 
 2362: 	return (error);
 2363: }
 2364: 
 2365: #ifdef BUS_DEBUG
 2366: 
 2367: /*
 2368:  * The _short versions avoid iteration by not calling anything that prints
 2369:  * more than oneliners. I love oneliners.
 2370:  */
 2371: 
 2372: static void
 2373: print_device_short(device_t dev, int indent)
 2374: {
 2375: 	if (!dev)
 2376: 		return;
 2377: 
 2378: 	indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
 2379: 		      dev->unit, dev->desc,
 2380: 		      (dev->parent? "":"no "),
 2381: 		      (TAILQ_EMPTY(&dev->children)? "no ":""),
 2382: 		      (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
 2383: 		      (dev->flags&DF_FIXEDCLASS? "fixed,":""),
 2384: 		      (dev->flags&DF_WILDCARD? "wildcard,":""),
 2385: 		      (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
 2386: 		      (dev->ivars? "":"no "),
 2387: 		      (dev->softc? "":"no "),
 2388: 		      dev->busy));
 2389: }
 2390: 
 2391: static void
 2392: print_device(device_t dev, int indent)
 2393: {
 2394: 	if (!dev)
 2395: 		return;
 2396: 
 2397: 	print_device_short(dev, indent);
 2398: 
 2399: 	indentprintf(("Parent:\n"));
 2400: 	print_device_short(dev->parent, indent+1);
 2401: 	indentprintf(("Driver:\n"));
 2402: 	print_driver_short(dev->driver, indent+1);
 2403: 	indentprintf(("Devclass:\n"));
 2404: 	print_devclass_short(dev->devclass, indent+1);
 2405: }
 2406: 
 2407: /*
 2408:  * Print the device and all its children (indented).
 2409:  */
 2410: void
 2411: print_device_tree_short(device_t dev, int indent)
 2412: {
 2413: 	device_t child;
 2414: 
 2415: 	if (!dev)
 2416: 		return;
 2417: 
 2418: 	print_device_short(dev, indent);
 2419: 
 2420: 	TAILQ_FOREACH(child, &dev->children, link)
 2421: 		print_device_tree_short(child, indent+1);
 2422: }
 2423: 
 2424: /*
 2425:  * Print the device and all its children (indented).
 2426:  */
 2427: void
 2428: print_device_tree(device_t dev, int indent)
 2429: {
 2430: 	device_t child;
 2431: 
 2432: 	if (!dev)
 2433: 		return;
 2434: 
 2435: 	print_device(dev, indent);
 2436: 
 2437: 	TAILQ_FOREACH(child, &dev->children, link)
 2438: 		print_device_tree(child, indent+1);
 2439: }
 2440: 
 2441: static void
 2442: print_driver_short(driver_t *driver, int indent)
 2443: {
 2444: 	if (!driver)
 2445: 		return;
 2446: 
 2447: 	indentprintf(("driver %s: softc size = %d\n",
 2448: 		      driver->name, driver->size));
 2449: }
 2450: 
 2451: static void
 2452: print_driver(driver_t *driver, int indent)
 2453: {
 2454: 	if (!driver)
 2455: 		return;
 2456: 
 2457: 	print_driver_short(driver, indent);
 2458: }
 2459: 
 2460: 
 2461: static void
 2462: print_driver_list(driver_list_t drivers, int indent)
 2463: {
 2464: 	driverlink_t driver;
 2465: 
 2466: 	TAILQ_FOREACH(driver, &drivers, link)
 2467: 		print_driver(driver->driver, indent);
 2468: }
 2469: 
 2470: static void
 2471: print_devclass_short(devclass_t dc, int indent)
 2472: {
 2473: 	if (!dc)
 2474: 		return;
 2475: 
 2476: 	indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
 2477: }
 2478: 
 2479: static void
 2480: print_devclass(devclass_t dc, int indent)
 2481: {
 2482: 	int i;
 2483: 
 2484: 	if (!dc)
 2485: 		return;
 2486: 
 2487: 	print_devclass_short(dc, indent);
 2488: 	indentprintf(("Drivers:\n"));
 2489: 	print_driver_list(dc->drivers, indent+1);
 2490: 
 2491: 	indentprintf(("Devices:\n"));
 2492: 	for (i = 0; i < dc->maxunit; i++)
 2493: 		if (dc->devices[i])
 2494: 			print_device(dc->devices[i], indent+1);
 2495: }
 2496: 
 2497: void
 2498: print_devclass_list_short(void)
 2499: {
 2500: 	devclass_t dc;
 2501: 
 2502: 	printf("Short listing of devclasses, drivers & devices:\n");
 2503: 	TAILQ_FOREACH(dc, &devclasses, link) {
 2504: 		print_devclass_short(dc, 0);
 2505: 	}
 2506: }
 2507: 
 2508: void
 2509: print_devclass_list(void)
 2510: {
 2511: 	devclass_t dc;
 2512: 
 2513: 	printf("Full listing of devclasses, drivers & devices:\n");
 2514: 	TAILQ_FOREACH(dc, &devclasses, link) {
 2515: 		print_devclass(dc, 0);
 2516: 	}
 2517: }
 2518: 
 2519: #endif
 2520: 
 2521: /*
 2522:  * Check to see if a device is disabled via a disabled hint.
 2523:  */
 2524: int
 2525: resource_disabled(const char *name, int unit)
 2526: {
 2527: 	int error, value;
 2528: 
 2529: 	error = resource_int_value(name, unit, "disabled", &value);
 2530: 	if (error)
 2531: 	       return(0);
 2532: 	return(value);
 2533: }