xref: /titanic_51/usr/src/uts/sun4v/io/vnet_dds.c (revision 791a814c934fcd4deb13b26c1f116ff283272a0d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <sys/modctl.h>
28 #include <sys/prom_plat.h>
29 #include <sys/ddi.h>
30 #include <sys/sunddi.h>
31 #include <sys/sunndi.h>
32 #include <sys/ndi_impldefs.h>
33 #include <sys/ddi_impldefs.h>
34 #include <sys/ethernet.h>
35 #include <sys/machsystm.h>
36 #include <sys/hypervisor_api.h>
37 #include <sys/mach_descrip.h>
38 #include <sys/drctl.h>
39 #include <sys/dr_util.h>
40 #include <sys/mac.h>
41 #include <sys/vnet.h>
42 #include <sys/vnet_mailbox.h>
43 #include <sys/vnet_common.h>
44 #include <sys/hsvc.h>
45 
46 
47 #define	VDDS_MAX_RANGES		6	/* 6 possible VRs */
48 #define	VDDS_MAX_VRINTRS	8	/* limited to 8 intrs/VR */
49 #define	VDDS_MAX_INTR_NUM	64	/* 0-63 or valid */
50 
51 #define	VDDS_INO_RANGE_START(x) (x * VDDS_MAX_VRINTRS)
52 #define	HVCOOKIE(c)	((c) & 0xFFFFFFFFF)
53 #define	NIUCFGHDL(c)	((c) >> 32)
54 
55 
56 /* For "ranges" property */
57 typedef struct vdds_ranges {
58 	uint32_t child_hi;
59 	uint32_t child_lo;
60 	uint32_t parent_hi;
61 	uint32_t parent_lo;
62 	uint32_t size_hi;
63 	uint32_t size_lo;
64 } vdds_ranges_t;
65 
66 /* For "reg" property */
67 typedef struct vdds_reg {
68 	uint32_t addr_hi;
69 	uint32_t addr_lo;
70 	uint32_t size_hi;
71 	uint32_t size_lo;
72 } vdds_reg_t;
73 
74 /* For ddi callback argument */
75 typedef struct vdds_cb_arg {
76 	dev_info_t *dip;
77 	uint64_t cookie;
78 	uint64_t macaddr;
79 	uint32_t max_frame_size;
80 } vdds_cb_arg_t;
81 
82 
83 /* Functions exported to other files */
84 void vdds_mod_init(void);
85 void vdds_mod_fini(void);
86 int vdds_init(vnet_t *vnetp);
87 void vdds_cleanup(vnet_t *vnetp);
88 void vdds_process_dds_msg(vnet_t *vnetp, vio_dds_msg_t *dmsg);
89 void vdds_cleanup_hybrid_res(void *arg);
90 void vdds_cleanup_hio(vnet_t *vnetp);
91 
92 /* Support functions to create/destory Hybrid device */
93 static dev_info_t *vdds_create_niu_node(uint64_t cookie,
94     uint64_t macaddr, uint32_t max_frame_size);
95 static int vdds_destroy_niu_node(dev_info_t *niu_dip, uint64_t cookie);
96 static dev_info_t *vdds_create_new_node(vdds_cb_arg_t *cba,
97     dev_info_t *pdip, int (*new_node_func)(dev_info_t *dip,
98     void *arg, uint_t flags));
99 static int vdds_new_nexus_node(dev_info_t *dip, void *arg, uint_t flags);
100 static int vdds_new_niu_node(dev_info_t *dip, void *arg, uint_t flags);
101 static dev_info_t *vdds_find_node(uint64_t cookie, dev_info_t *sdip,
102 	int (*match_func)(dev_info_t *dip, void *arg));
103 static int vdds_match_niu_nexus(dev_info_t *dip, void *arg);
104 static int vdds_match_niu_node(dev_info_t *dip, void *arg);
105 static int vdds_get_interrupts(uint64_t cookie, int ino_range,
106     int *intrs, int *nintr);
107 
108 /* DDS message processing related functions */
109 static void vdds_process_dds_msg_task(void *arg);
110 static int vdds_send_dds_resp_msg(vnet_t *vnetp, vio_dds_msg_t *dmsg, int ack);
111 static int vdds_send_dds_rel_msg(vnet_t *vnetp);
112 static void vdds_release_range_prop(dev_info_t *nexus_dip, uint64_t cookie);
113 
114 /* Functions imported from other files */
115 extern int vnet_send_dds_msg(vnet_t *vnetp, void *dmsg);
116 extern int vnet_hio_mac_init(vnet_t *vnetp, char *ifname);
117 extern void vnet_hio_mac_cleanup(vnet_t *vnetp);
118 
119 /* HV functions that are used in this file */
120 extern uint64_t vdds_hv_niu_vr_getinfo(uint32_t hvcookie,
121     uint64_t *real_start, uint64_t *size);
122 extern uint64_t vdds_hv_niu_vr_get_txmap(uint32_t hvcookie, uint64_t *dma_map);
123 extern uint64_t vdds_hv_niu_vr_get_rxmap(uint32_t hvcookie, uint64_t *dma_map);
124 extern uint64_t vdds_hv_niu_vrtx_set_ino(uint32_t cookie, uint64_t vch_idx,
125     uint32_t ino);
126 extern uint64_t vdds_hv_niu_vrrx_set_ino(uint32_t cookie, uint64_t vch_idx,
127     uint32_t ino);
128 
129 
130 #ifdef DEBUG
131 
132 extern int vnet_dbglevel;
133 
134 static void
135 debug_printf(const char *fname, void *arg,  const char *fmt, ...)
136 {
137 	char    buf[512];
138 	va_list ap;
139 	char    *bufp = buf;
140 	vnet_dds_info_t *vdds = arg;
141 
142 	if (vdds != NULL) {
143 		(void) sprintf(bufp, "vnet%d: %s: ",
144 		    vdds->vnetp->instance, fname);
145 	} else {
146 		(void) sprintf(bufp, "%s: ", fname);
147 	}
148 	bufp += strlen(bufp);
149 	va_start(ap, fmt);
150 	(void) vsprintf(bufp, fmt, ap);
151 	va_end(ap);
152 	cmn_err(CE_CONT, "%s\n", buf);
153 }
154 #endif
155 
156 /*
157  * Hypervisor N2/NIU services information.
158  */
159 static hsvc_info_t niu_hsvc = {
160 	HSVC_REV_1, NULL, HSVC_GROUP_NIU, 1, 1, "vnet_dds"
161 };
162 
163 /*
164  * Lock to serialize the NIU device node related operations.
165  */
166 kmutex_t vdds_dev_lock;
167 
168 boolean_t vdds_hv_hio_capable = B_FALSE;
169 
170 /*
171  * vdds_mod_init -- one time initialization.
172  */
173 void
174 vdds_mod_init(void)
175 {
176 	int rv;
177 	uint64_t minor;
178 
179 	rv = hsvc_register(&niu_hsvc, &minor);
180 	/*
181 	 * Only HV version 1.1 is capable of NIU Hybrid IO.
182 	 */
183 	if ((rv == 0) && (minor == 1)) {
184 		vdds_hv_hio_capable = B_TRUE;
185 	}
186 	mutex_init(&vdds_dev_lock, NULL, MUTEX_DRIVER, NULL);
187 	DBG1(NULL, "HV HIO capable");
188 }
189 
190 /*
191  * vdds_mod_fini -- one time cleanup.
192  */
193 void
194 vdds_mod_fini(void)
195 {
196 	(void) hsvc_unregister(&niu_hsvc);
197 	mutex_destroy(&vdds_dev_lock);
198 }
199 
200 /*
201  * vdds_init -- vnet instance related DDS related initialization.
202  */
203 int
204 vdds_init(vnet_t *vnetp)
205 {
206 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
207 	char		qname[TASKQ_NAMELEN];
208 
209 	vdds->vnetp = vnetp;
210 	DBG1(vdds, "Initializing..");
211 	(void) snprintf(qname, TASKQ_NAMELEN, "vdds_taskq%d", vnetp->instance);
212 	if ((vdds->dds_taskqp = ddi_taskq_create(vnetp->dip, qname, 1,
213 	    TASKQ_DEFAULTPRI, 0)) == NULL) {
214 		cmn_err(CE_WARN, "!vnet%d: Unable to create DDS task queue",
215 		    vnetp->instance);
216 		return (ENOMEM);
217 	}
218 	mutex_init(&vdds->lock, NULL, MUTEX_DRIVER, NULL);
219 	return (0);
220 }
221 
222 /*
223  * vdds_cleanup -- vnet instance related cleanup.
224  */
225 void
226 vdds_cleanup(vnet_t *vnetp)
227 {
228 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
229 
230 	DBG1(vdds, "Cleanup...");
231 	/* Cleanup/destroy any hybrid resouce that exists */
232 	vdds_cleanup_hybrid_res(vnetp);
233 
234 	/* taskq_destroy will wait for all taskqs to complete */
235 	ddi_taskq_destroy(vdds->dds_taskqp);
236 	vdds->dds_taskqp = NULL;
237 	mutex_destroy(&vdds->lock);
238 	DBG1(vdds, "Cleanup complete");
239 }
240 
241 /*
242  * vdds_cleanup_hybrid_res -- Cleanup Hybrid resource.
243  */
244 void
245 vdds_cleanup_hybrid_res(void *arg)
246 {
247 	vnet_t *vnetp = arg;
248 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
249 
250 	DBG1(vdds, "Hybrid device cleanup...");
251 	mutex_enter(&vdds->lock);
252 	if (vdds->task_flags == VNET_DDS_TASK_ADD_SHARE) {
253 		/*
254 		 * Task for ADD_SHARE is pending, simply
255 		 * cleanup the flags, the task will quit without
256 		 * any changes.
257 		 */
258 		vdds->task_flags = 0;
259 		DBG2(vdds, "Task for ADD is pending, clean flags only");
260 	} else if ((vdds->hio_dip != NULL) && (vdds->task_flags == 0)) {
261 		/*
262 		 * There is no task pending and a hybrid device
263 		 * is present, so dispatch a task to release the share.
264 		 */
265 		vdds->task_flags = VNET_DDS_TASK_REL_SHARE;
266 		(void) ddi_taskq_dispatch(vdds->dds_taskqp,
267 		    vdds_process_dds_msg_task, vnetp, DDI_NOSLEEP);
268 		DBG2(vdds, "Dispatched a task to destroy HIO device");
269 	}
270 	/*
271 	 * Other possible cases include either DEL_SHARE or
272 	 * REL_SHARE as pending. In that case, there is nothing
273 	 * to do as a task is already pending to do the cleanup.
274 	 */
275 	mutex_exit(&vdds->lock);
276 	DBG1(vdds, "Hybrid device cleanup complete");
277 }
278 
279 /*
280  * vdds_cleanup_hio -- An interface to cleanup the hio resources before
281  *	resetting the vswitch port.
282  */
283 void
284 vdds_cleanup_hio(vnet_t *vnetp)
285 {
286 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
287 
288 	/* Wait for any pending vdds tasks to complete */
289 	ddi_taskq_wait(vdds->dds_taskqp);
290 	vdds_cleanup_hybrid_res(vnetp);
291 	/* Wait for the cleanup task to complete */
292 	ddi_taskq_wait(vdds->dds_taskqp);
293 }
294 
295 /*
296  * vdds_process_dds_msg -- Process a DDS message.
297  */
298 void
299 vdds_process_dds_msg(vnet_t *vnetp, vio_dds_msg_t *dmsg)
300 {
301 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
302 	int rv;
303 
304 	DBG1(vdds, "DDS message received...");
305 
306 	if (dmsg->dds_class != DDS_VNET_NIU) {
307 		DBG2(vdds, "Invalid class send NACK");
308 		(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
309 		return;
310 	}
311 	mutex_enter(&vdds->lock);
312 	switch (dmsg->dds_subclass) {
313 	case DDS_VNET_ADD_SHARE:
314 		DBG2(vdds, "DDS_VNET_ADD_SHARE message...");
315 		if ((vdds->task_flags != 0) || (vdds->hio_dip != NULL)) {
316 			/*
317 			 * Either a task is already pending or
318 			 * a hybrid device already exists.
319 			 */
320 			DWARN(vdds, "NACK: Already pending DDS task");
321 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
322 			mutex_exit(&vdds->lock);
323 			return;
324 		}
325 		vdds->task_flags = VNET_DDS_TASK_ADD_SHARE;
326 		bcopy(dmsg, &vnetp->vdds_info.dmsg, sizeof (vio_dds_msg_t));
327 		DBG2(vdds, "Dispatching task for ADD_SHARE");
328 		rv = ddi_taskq_dispatch(vdds->dds_taskqp,
329 		    vdds_process_dds_msg_task, vnetp, DDI_NOSLEEP);
330 		if (rv != 0) {
331 			/* Send NACK */
332 			DBG2(vdds, "NACK: Failed to dispatch task");
333 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
334 			vdds->task_flags = 0;
335 		}
336 		break;
337 
338 	case DDS_VNET_DEL_SHARE:
339 		DBG2(vdds, "DDS_VNET_DEL_SHARE message...");
340 		if (vdds->task_flags == VNET_DDS_TASK_ADD_SHARE) {
341 			/*
342 			 * ADD_SHARE task still pending, simply clear
343 			 * task falgs and ACK.
344 			 */
345 			DBG2(vdds, "ACK:ADD_SHARE task still pending");
346 			vdds->task_flags = 0;
347 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_TRUE);
348 			mutex_exit(&vdds->lock);
349 			return;
350 		}
351 		if ((vdds->task_flags == 0) && (vdds->hio_dip == NULL)) {
352 			/* Send NACK */
353 			DBG2(vdds, "NACK:No HIO device exists");
354 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
355 			mutex_exit(&vdds->lock);
356 			return;
357 		}
358 		vdds->task_flags = VNET_DDS_TASK_DEL_SHARE;
359 		bcopy(dmsg, &vdds->dmsg, sizeof (vio_dds_msg_t));
360 		DBG2(vdds, "Dispatching DEL_SHARE task");
361 		rv = ddi_taskq_dispatch(vdds->dds_taskqp,
362 		    vdds_process_dds_msg_task, vnetp, DDI_NOSLEEP);
363 		if (rv != 0) {
364 			/* Send NACK */
365 			DBG2(vdds, "NACK: failed to dispatch task");
366 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
367 			vdds->task_flags = 0;
368 		}
369 		break;
370 	case DDS_VNET_REL_SHARE:
371 		DBG2(vdds, "Reply for REL_SHARE reply=%d",
372 		    dmsg->tag.vio_subtype);
373 		break;
374 	default:
375 		DWARN(vdds, "Discarding Unknown DDS message");
376 		break;
377 	}
378 	mutex_exit(&vdds->lock);
379 }
380 
381 /*
382  * vdds_process_dds_msg_task -- Called from a taskq to process the
383  *	DDS message.
384  */
385 static void
386 vdds_process_dds_msg_task(void *arg)
387 {
388 	vnet_t		*vnetp = arg;
389 	vnet_dds_info_t	*vdds = &vnetp->vdds_info;
390 	vio_dds_msg_t	*dmsg = &vdds->dmsg;
391 	dev_info_t	*dip;
392 	uint32_t	max_frame_size;
393 	uint64_t	hio_cookie;
394 	int		rv;
395 
396 	DBG1(vdds, "DDS task started...");
397 	mutex_enter(&vdds->lock);
398 	switch (vdds->task_flags) {
399 	case VNET_DDS_TASK_ADD_SHARE:
400 		DBG2(vdds, "ADD_SHARE task...");
401 		hio_cookie = dmsg->msg.share_msg.cookie;
402 		/*
403 		 * max-frame-size value need to be set to
404 		 * the full ethernet frame size. That is,
405 		 * header + payload + checksum.
406 		 */
407 		max_frame_size = vnetp->mtu +
408 		    sizeof (struct  ether_vlan_header) + ETHERFCSL;
409 		dip = vdds_create_niu_node(hio_cookie,
410 		    dmsg->msg.share_msg.macaddr, max_frame_size);
411 		if (dip == NULL) {
412 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
413 			DERR(vdds, "Failed to create HIO node");
414 		} else {
415 			vdds->hio_dip = dip;
416 			vdds->hio_cookie = hio_cookie;
417 			sprintf(vdds->hio_ifname, "%s%d", ddi_driver_name(dip),
418 			    ddi_get_instance(dip));
419 
420 			rv = vnet_hio_mac_init(vnetp, vdds->hio_ifname);
421 			if (rv != 0) {
422 				/* failed - cleanup, send failed DDS message */
423 				DERR(vdds, "HIO mac init failed, cleaning up");
424 				rv = vdds_destroy_niu_node(dip, hio_cookie);
425 				if (rv == 0) {
426 					/* use DERR to print by default */
427 					DERR(vdds, "Successfully destroyed"
428 					    " Hybrid node");
429 				} else {
430 					cmn_err(CE_WARN, "vnet%d:Failed to "
431 					    "destroy Hybrid node",
432 					    vnetp->instance);
433 				}
434 				vdds->hio_dip = NULL;
435 				vdds->hio_cookie = 0;
436 				(void) vdds_send_dds_resp_msg(vnetp,
437 				    dmsg, B_FALSE);
438 			} else {
439 				(void) vdds_send_dds_resp_msg(vnetp,
440 				    dmsg, B_TRUE);
441 			}
442 			/* DERR used only print by default */
443 			DERR(vdds, "Successfully created HIO node");
444 		}
445 		break;
446 
447 	case VNET_DDS_TASK_DEL_SHARE:
448 		DBG2(vdds, "DEL_SHARE task...");
449 		if (vnetp->vdds_info.hio_dip == NULL) {
450 			DBG2(vdds, "NACK: No HIO device destroy");
451 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_FALSE);
452 		} else {
453 			vnet_hio_mac_cleanup(vnetp);
454 			rv = vdds_destroy_niu_node(vnetp->vdds_info.hio_dip,
455 			    vdds->hio_cookie);
456 			if (rv == 0) {
457 				/* use DERR to print by default */
458 				DERR(vdds, "Successfully destroyed"
459 				    " Hybrid node");
460 			} else {
461 				cmn_err(CE_WARN, "vnet%d:Failed to "
462 				    "destroy Hybrid node", vnetp->instance);
463 			}
464 			/* TODO: send ACK even for failure? */
465 			DBG2(vdds, "ACK: HIO device destroyed");
466 			(void) vdds_send_dds_resp_msg(vnetp, dmsg, B_TRUE);
467 			vdds->hio_dip = 0;
468 			vdds->hio_cookie = 0;
469 		}
470 		break;
471 	case VNET_DDS_TASK_REL_SHARE:
472 		DBG2(vdds, "REL_SHARE task...");
473 		if (vnetp->vdds_info.hio_dip != NULL) {
474 			vnet_hio_mac_cleanup(vnetp);
475 			rv = vdds_destroy_niu_node(vnetp->vdds_info.hio_dip,
476 			    vdds->hio_cookie);
477 			if (rv == 0) {
478 				DERR(vdds, "Successfully destroyed "
479 				    "Hybrid node");
480 			} else {
481 				cmn_err(CE_WARN, "vnet%d:Failed to "
482 				    "destroy HIO node", vnetp->instance);
483 			}
484 			/* TODO: failure case */
485 			(void) vdds_send_dds_rel_msg(vnetp);
486 			vdds->hio_dip = 0;
487 			vdds->hio_cookie = 0;
488 		}
489 		break;
490 	default:
491 		break;
492 	}
493 	vdds->task_flags = 0;
494 	mutex_exit(&vdds->lock);
495 }
496 
497 /*
498  * vdds_send_dds_rel_msg -- Send a DDS_REL_SHARE message.
499  */
500 static int
501 vdds_send_dds_rel_msg(vnet_t *vnetp)
502 {
503 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
504 	vio_dds_msg_t	vmsg;
505 	dds_share_msg_t	*smsg = &vmsg.msg.share_msg;
506 	int rv;
507 
508 	DBG1(vdds, "Sending DDS_VNET_REL_SHARE message");
509 	vmsg.tag.vio_msgtype = VIO_TYPE_CTRL;
510 	vmsg.tag.vio_subtype = VIO_SUBTYPE_INFO;
511 	vmsg.tag.vio_subtype_env = VIO_DDS_INFO;
512 	/* vio_sid filled by the LDC module */
513 	vmsg.dds_class = DDS_VNET_NIU;
514 	vmsg.dds_subclass = DDS_VNET_REL_SHARE;
515 	vmsg.dds_req_id = (++vdds->dds_req_id);
516 	smsg->macaddr = vnet_macaddr_strtoul(vnetp->curr_macaddr);
517 	smsg->cookie = vdds->hio_cookie;
518 	rv = vnet_send_dds_msg(vnetp, &vmsg);
519 	return (rv);
520 }
521 
522 /*
523  * vdds_send_dds_resp_msg -- Send a DDS response message.
524  */
525 static int
526 vdds_send_dds_resp_msg(vnet_t *vnetp, vio_dds_msg_t *dmsg, int ack)
527 {
528 	vnet_dds_info_t *vdds = &vnetp->vdds_info;
529 	int rv;
530 
531 	DBG1(vdds, "Sending a response mesage=%d", ack);
532 	if (ack == B_TRUE) {
533 		dmsg->tag.vio_subtype = VIO_SUBTYPE_ACK;
534 		dmsg->msg.share_resp_msg.status = DDS_VNET_SUCCESS;
535 	} else {
536 		dmsg->tag.vio_subtype = VIO_SUBTYPE_NACK;
537 		dmsg->msg.share_resp_msg.status = DDS_VNET_FAIL;
538 	}
539 	rv = vnet_send_dds_msg(vnetp, dmsg);
540 	return (rv);
541 }
542 
543 /*
544  * vdds_create_niu_node -- Create NIU Hybrid node. The NIU nexus
545  *	node also created if it doesn't exist already.
546  */
547 dev_info_t *
548 vdds_create_niu_node(uint64_t cookie, uint64_t macaddr, uint32_t max_frame_size)
549 {
550 	dev_info_t *nexus_dip;
551 	dev_info_t *niu_dip;
552 	vdds_cb_arg_t cba;
553 
554 	DBG1(NULL, "Called");
555 
556 	if (vdds_hv_hio_capable == B_FALSE) {
557 		return (NULL);
558 	}
559 	mutex_enter(&vdds_dev_lock);
560 	/* Check if the nexus node exists already */
561 	nexus_dip = vdds_find_node(cookie, ddi_root_node(),
562 	    vdds_match_niu_nexus);
563 	if (nexus_dip == NULL) {
564 		/*
565 		 * NIU nexus node not found, so create it now.
566 		 */
567 		cba.dip = NULL;
568 		cba.cookie = cookie;
569 		cba.macaddr = macaddr;
570 		cba.max_frame_size = max_frame_size;
571 		nexus_dip = vdds_create_new_node(&cba, NULL,
572 		    vdds_new_nexus_node);
573 		if (nexus_dip == NULL) {
574 			mutex_exit(&vdds_dev_lock);
575 			return (NULL);
576 		}
577 	}
578 	DBG2(NULL, "nexus_dip = 0x%p", nexus_dip);
579 
580 	/* Check if NIU node exists already before creating one */
581 	niu_dip = vdds_find_node(cookie, nexus_dip,
582 	    vdds_match_niu_node);
583 	if (niu_dip == NULL) {
584 		cba.dip = NULL;
585 		cba.cookie = cookie;
586 		cba.macaddr = macaddr;
587 		cba.max_frame_size = max_frame_size;
588 		niu_dip = vdds_create_new_node(&cba, nexus_dip,
589 		    vdds_new_niu_node);
590 		/*
591 		 * Hold the niu_dip to prevent it from
592 		 * detaching.
593 		 */
594 		if (niu_dip != NULL) {
595 			e_ddi_hold_devi(niu_dip);
596 		} else {
597 			DWARN(NULL, "niumx/network node creation failed");
598 		}
599 	} else {
600 		DWARN(NULL, "niumx/network node already exists(dip=0x%p)",
601 		    niu_dip);
602 	}
603 	/* release the hold that was done in find/create */
604 	if ((niu_dip != NULL) && (e_ddi_branch_held(niu_dip)))
605 		e_ddi_branch_rele(niu_dip);
606 	if (e_ddi_branch_held(nexus_dip))
607 		e_ddi_branch_rele(nexus_dip);
608 	mutex_exit(&vdds_dev_lock);
609 	DBG1(NULL, "returning niu_dip=0x%p", niu_dip);
610 	return (niu_dip);
611 }
612 
613 /*
614  * vdds_destroy_niu_node -- Destroy the NIU node.
615  */
616 int
617 vdds_destroy_niu_node(dev_info_t *niu_dip, uint64_t cookie)
618 {
619 	int rv;
620 	dev_info_t *fdip = NULL;
621 	dev_info_t *nexus_dip = ddi_get_parent(niu_dip);
622 
623 
624 	DBG1(NULL, "Called");
625 	ASSERT(nexus_dip != NULL);
626 	mutex_enter(&vdds_dev_lock);
627 
628 	if (!e_ddi_branch_held(niu_dip))
629 		e_ddi_branch_hold(niu_dip);
630 	/*
631 	 * As we are destroying now, release the
632 	 * hold that was done in during the creation.
633 	 */
634 	ddi_release_devi(niu_dip);
635 	rv = e_ddi_branch_destroy(niu_dip, &fdip, 0);
636 	if (rv != 0) {
637 		DERR(NULL, "Failed to destroy niumx/network node dip=0x%p",
638 		    niu_dip);
639 		if (fdip != NULL) {
640 			ddi_release_devi(fdip);
641 		}
642 		rv = EBUSY;
643 		goto dest_exit;
644 	}
645 	/*
646 	 * Cleanup the parent's ranges property set
647 	 * for this Hybrid device.
648 	 */
649 	vdds_release_range_prop(nexus_dip, cookie);
650 
651 dest_exit:
652 	mutex_exit(&vdds_dev_lock);
653 	DBG1(NULL, "returning rv=%d", rv);
654 	return (rv);
655 }
656 
657 /*
658  * vdds_match_niu_nexus -- callback function to verify a node is the
659  *	NIU nexus node.
660  */
661 static int
662 vdds_match_niu_nexus(dev_info_t *dip, void *arg)
663 {
664 	vdds_cb_arg_t	*warg = (vdds_cb_arg_t *)arg;
665 	vdds_reg_t	*reg_p;
666 	char		*name;
667 	uint64_t	hdl;
668 	uint_t		reglen;
669 	int		rv;
670 
671 	if (dip == ddi_root_node()) {
672 		return (DDI_WALK_CONTINUE);
673 	}
674 
675 	name = ddi_node_name(dip);
676 	if (strcmp(name, "niu")  != 0) {
677 		return (DDI_WALK_CONTINUE);
678 	}
679 	rv = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip,
680 	    DDI_PROP_DONTPASS, "reg", (int **)&reg_p, &reglen);
681 	if (rv != DDI_PROP_SUCCESS) {
682 		DWARN(NULL, "Failed to get reg property dip=0x%p", dip);
683 		return (DDI_WALK_CONTINUE);
684 	}
685 
686 	hdl =  reg_p->addr_hi & 0x0FFFFFFF;
687 	ddi_prop_free(reg_p);
688 
689 	DBG2(NULL, "Handle = 0x%lx dip=0x%p", hdl, dip);
690 	if (hdl == NIUCFGHDL(warg->cookie)) {
691 		/* Hold before returning */
692 		if (!e_ddi_branch_held(dip))
693 			e_ddi_branch_hold(dip);
694 		warg->dip = dip;
695 		DBG2(NULL, "Found dip = 0x%p", dip);
696 		return (DDI_WALK_TERMINATE);
697 	}
698 	return (DDI_WALK_CONTINUE);
699 }
700 
701 /*
702  * vdds_match_niu_node -- callback function to verify a node is the
703  *	NIU Hybrid node.
704  */
705 static int
706 vdds_match_niu_node(dev_info_t *dip, void *arg)
707 {
708 	vdds_cb_arg_t	*warg = (vdds_cb_arg_t *)arg;
709 	char		*name;
710 	vdds_reg_t	*reg_p;
711 	uint_t		reglen;
712 	int		rv;
713 	uint32_t	addr_hi;
714 
715 	name = ddi_node_name(dip);
716 	if (strcmp(name, "network")  != 0) {
717 		return (DDI_WALK_CONTINUE);
718 	}
719 	rv = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip,
720 	    DDI_PROP_DONTPASS, "reg", (int **)&reg_p, &reglen);
721 	if (rv != DDI_PROP_SUCCESS) {
722 		DWARN(NULL, "Failed to get reg property dip=0x%p", dip);
723 		return (DDI_WALK_CONTINUE);
724 	}
725 
726 	addr_hi = reg_p->addr_hi;
727 	DBG1(NULL, "addr_hi = 0x%x dip=0x%p", addr_hi, dip);
728 	ddi_prop_free(reg_p);
729 	if (addr_hi == HVCOOKIE(warg->cookie)) {
730 		warg->dip = dip;
731 		if (!e_ddi_branch_held(dip))
732 			e_ddi_branch_hold(dip);
733 		DBG1(NULL, "Found dip = 0x%p", dip);
734 		return (DDI_WALK_TERMINATE);
735 	}
736 	return (DDI_WALK_CONTINUE);
737 }
738 
739 /*
740  * vdds_new_nexus_node -- callback function to set all the properties
741  *	a new NIU nexus node.
742  */
743 static int
744 vdds_new_nexus_node(dev_info_t *dip, void *arg, uint_t flags)
745 {
746 	vdds_cb_arg_t	*cba = (vdds_cb_arg_t *)arg;
747 	char		*compat[] = { "SUNW,niumx" };
748 	vdds_ranges_t	*rangesp;
749 	vdds_reg_t	reg;
750 	uint64_t	nranges;
751 	int		n;
752 
753 	DBG1(NULL, "Called dip=0x%p, flags=0x%X", dip, flags);
754 
755 	/* create "niu" property */
756 	if (ndi_prop_update_string(DDI_DEV_T_NONE, dip, "name", "niu") !=
757 	    DDI_SUCCESS) {
758 		DERR(NULL, "Failed to create name property(dip=0x%p)", dip);
759 		return (DDI_WALK_ERROR);
760 	}
761 
762 	/* create "compatible" property */
763 	if (ndi_prop_update_string_array(DDI_DEV_T_NONE, dip, "compatible",
764 	    compat, 1) != DDI_SUCCESS) {
765 		DERR(NULL, "Failed to create compatible property(dip=0x%p)",
766 		    dip);
767 		return (DDI_WALK_ERROR);
768 	}
769 
770 	/* create "device_type" property */
771 	if (ndi_prop_update_string(DDI_DEV_T_NONE, dip,
772 	    "device_type", "sun4v") != DDI_SUCCESS) {
773 		DERR(NULL, "Failed to create device_type property(dip=0x%p)",
774 		    dip);
775 		return (DDI_WALK_ERROR);
776 	}
777 
778 	/*
779 	 * create "reg" property. The first 28 bits of
780 	 * 'addr_hi'  are NIU cfg_handle, the 0xc in 28-31 bits
781 	 * indicates non-cacheable config.
782 	 */
783 	reg.addr_hi = 0xc0000000 | NIUCFGHDL(cba->cookie);
784 	reg.addr_lo = 0;
785 	reg.size_hi = 0;
786 	reg.size_lo = 0;
787 	if (ndi_prop_update_int_array(DDI_DEV_T_NONE, dip,
788 	    "reg", (int *)&reg, sizeof (reg)/sizeof (int)) != DDI_SUCCESS) {
789 		DERR(NULL, "Failed to create reg property(dip=0x%p)", dip);
790 		return (DDI_WALK_ERROR);
791 	}
792 
793 	/*
794 	 * Create VDDS_MAX_RANGES so that they are already in place
795 	 * before the children are created. While creating the child
796 	 * we just modify one of this ranges entries.
797 	 */
798 	nranges = VDDS_MAX_RANGES;  /* One range for each VR */
799 	rangesp = (vdds_ranges_t *)kmem_zalloc(
800 	    (sizeof (vdds_ranges_t) * nranges), KM_SLEEP);
801 
802 	for (n = 0; n < nranges; n++) {
803 		/* zero all child_hi/lo */
804 		rangesp[n].child_hi = 0;
805 		rangesp[n].child_lo = 0;
806 	}
807 
808 	if (ndi_prop_update_int_array(DDI_DEV_T_NONE, dip, "ranges",
809 	    (int *)rangesp, (nranges * 6)) != DDI_SUCCESS) {
810 		DERR(NULL, "Failed to create ranges property(dip=0x%p)", dip);
811 		kmem_free(rangesp, (sizeof (vdds_ranges_t) * nranges));
812 		return (DDI_WALK_ERROR);
813 	}
814 
815 	/* create "#size-cells" property */
816 	if (ndi_prop_update_int(DDI_DEV_T_NONE, dip,
817 	    "#size-cells", 2) != DDI_SUCCESS) {
818 		DERR(NULL, "Failed to create #size-cells property(dip=0x%p)",
819 		    dip);
820 		kmem_free(rangesp, (sizeof (vdds_ranges_t) * nranges));
821 		return (DDI_WALK_ERROR);
822 	}
823 
824 	/* create "#address-cells" property */
825 	if (ndi_prop_update_int(DDI_DEV_T_NONE, dip,
826 	    "#address-cells", 2) != DDI_SUCCESS) {
827 		DERR(NULL, "Failed to create #address-cells prop(dip=0x%p)",
828 		    dip);
829 		kmem_free(rangesp, (sizeof (vdds_ranges_t) * nranges));
830 		return (DDI_WALK_ERROR);
831 	}
832 
833 	kmem_free(rangesp, (sizeof (vdds_ranges_t) * nranges));
834 	cba->dip = dip;
835 	DBG1(NULL, "Returning (dip=0x%p)", dip);
836 	return (DDI_WALK_TERMINATE);
837 }
838 
839 /*
840  * vdds_new_niu_node -- callback function to create a new NIU Hybrid node.
841  */
842 static int
843 vdds_new_niu_node(dev_info_t *dip, void *arg, uint_t flags)
844 {
845 	vdds_cb_arg_t *cba = (vdds_cb_arg_t *)arg;
846 	char *compat[] = { "SUNW,niusl" };
847 	uint8_t macaddrbytes[ETHERADDRL];
848 	int interrupts[VDDS_MAX_VRINTRS];
849 	vdds_ranges_t	*prng;
850 	vdds_ranges_t	*prp;
851 	vdds_reg_t	reg;
852 	dev_info_t	*pdip;
853 	uint64_t	start;
854 	uint64_t	size;
855 	int		prnglen;
856 	int		nintr = 0;
857 	int		nrng;
858 	int		rnum;
859 	int		rv;
860 
861 	DBG1(NULL, "Called dip=0x%p flags=0x%X", dip, flags);
862 	pdip = ddi_get_parent(dip);
863 
864 	if (pdip == NULL) {
865 		DWARN(NULL, "Failed to get parent dip(dip=0x%p)", dip);
866 		return (DDI_WALK_ERROR);
867 	}
868 
869 	/* create "network" property */
870 	if (ndi_prop_update_string(DDI_DEV_T_NONE, dip, "name", "network") !=
871 	    DDI_SUCCESS) {
872 		DERR(NULL, "Failed to create name property(dip=0x%p)", dip);
873 		return (DDI_WALK_ERROR);
874 	}
875 
876 	/*
877 	 * create "niutype" property, it is set to n2niu to
878 	 * indicate NIU Hybrid node.
879 	 */
880 	if (ndi_prop_update_string(DDI_DEV_T_NONE, dip, "niutype",
881 	    "n2niu") != DDI_SUCCESS) {
882 		DERR(NULL, "Failed to create niuopmode property(dip=0x%p)",
883 		    dip);
884 		return (DDI_WALK_ERROR);
885 	}
886 
887 	/* create "compatible" property */
888 	if (ndi_prop_update_string_array(DDI_DEV_T_NONE, dip, "compatible",
889 	    compat, 1) != DDI_SUCCESS) {
890 		DERR(NULL, "Failed to create compatible property(dip=0x%p)",
891 		    dip);
892 		return (DDI_WALK_ERROR);
893 	}
894 
895 	/* create "device_type" property */
896 	if (ndi_prop_update_string(DDI_DEV_T_NONE, dip,
897 	    "device_type", "network") != DDI_SUCCESS) {
898 		DERR(NULL, "Failed to create device_type property(dip=0x%p)",
899 		    dip);
900 		return (DDI_WALK_ERROR);
901 	}
902 
903 	/* create "reg" property */
904 	if (vdds_hv_niu_vr_getinfo(HVCOOKIE(cba->cookie),
905 	    &start, &size) != H_EOK) {
906 		DERR(NULL, "Failed to get vrinfo for cookie(0x%lX)",
907 		    cba->cookie);
908 			return (DDI_WALK_ERROR);
909 	}
910 	reg.addr_hi = HVCOOKIE(cba->cookie);
911 	reg.addr_lo = 0;
912 	reg.size_hi = 0;
913 	reg.size_lo = size;
914 
915 	if (ndi_prop_update_int_array(DDI_DEV_T_NONE, dip, "reg",
916 	    (int *)&reg, sizeof (reg) / sizeof (int)) != DDI_SUCCESS) {
917 		DERR(NULL, "Failed to create reg property(dip=0x%p)", dip);
918 		return (DDI_WALK_ERROR);
919 	}
920 
921 	/*
922 	 * Modify the parent's ranges property to map the "reg" property
923 	 * of the new child.
924 	 */
925 	if ((rv = ddi_getlongprop(DDI_DEV_T_ANY, pdip, DDI_PROP_DONTPASS,
926 	    "ranges", (caddr_t)&prng, &prnglen)) != DDI_SUCCESS) {
927 		DERR(NULL,
928 		    "Failed to get parent's ranges property(pdip=0x%p) rv=%d",
929 		    pdip, rv);
930 		return (DDI_WALK_ERROR);
931 	}
932 	nrng = prnglen/(sizeof (vdds_ranges_t));
933 	/*
934 	 * First scan all ranges to see if a range corresponding
935 	 * to this virtual NIU exists already.
936 	 */
937 	for (rnum = 0; rnum < nrng; rnum++) {
938 		prp = &prng[rnum];
939 		if (prp->child_hi == HVCOOKIE(cba->cookie)) {
940 			break;
941 		}
942 	}
943 	if (rnum == nrng) {
944 		/* Now to try to find an empty range */
945 		for (rnum = 0; rnum < nrng; rnum++) {
946 			prp = &prng[rnum];
947 			if (prp->child_hi == 0) {
948 				break;
949 			}
950 		}
951 	}
952 	if (rnum == nrng) {
953 		DERR(NULL, "No free ranges entry found");
954 		return (DDI_WALK_ERROR);
955 	}
956 
957 	/*
958 	 * child_hi will have HV cookie as HV cookie is more like
959 	 * a port in the HybridIO.
960 	 */
961 	prp->child_hi = HVCOOKIE(cba->cookie);
962 	prp->child_lo = 0;
963 	prp->parent_hi = 0x80000000 | (start >> 32);
964 	prp->parent_lo = start & 0x00000000FFFFFFFF;
965 	prp->size_hi = (size >> 32);
966 	prp->size_lo = size & 0x00000000FFFFFFFF;
967 
968 	if (ndi_prop_update_int_array(DDI_DEV_T_NONE, pdip, "ranges",
969 	    (int *)prng, (nrng * 6)) != DDI_SUCCESS) {
970 		DERR(NULL, "Failed to update parent ranges prop(pdip=0x%p)",
971 		    pdip);
972 		return (DDI_WALK_ERROR);
973 	}
974 	kmem_free((void *)prng, prnglen);
975 
976 	vnet_macaddr_ultostr(cba->macaddr, macaddrbytes);
977 
978 	/*
979 	 * create "local-mac-address" property, this will be same as
980 	 * the vnet's mac-address.
981 	 */
982 	if (ndi_prop_update_byte_array(DDI_DEV_T_NONE, dip, "local-mac-address",
983 	    macaddrbytes, ETHERADDRL) != DDI_SUCCESS) {
984 		DERR(NULL, "Failed to update mac-addresses property(dip=0x%p)",
985 		    dip);
986 		return (DDI_WALK_ERROR);
987 	}
988 
989 	rv = vdds_get_interrupts(cba->cookie, rnum, interrupts, &nintr);
990 	if (rv != 0) {
991 		DERR(NULL, "Failed to get interrupts for cookie=0x%lx",
992 		    cba->cookie);
993 		return (DDI_WALK_ERROR);
994 	}
995 
996 	/* create "interrupts" property */
997 	if (ndi_prop_update_int_array(DDI_DEV_T_NONE, dip, "interrupts",
998 	    interrupts, nintr) != DDI_SUCCESS) {
999 		DERR(NULL, "Failed to update interrupts property(dip=0x%p)",
1000 		    dip);
1001 		return (DDI_WALK_ERROR);
1002 	}
1003 
1004 
1005 	/* create "max_frame_size" property */
1006 	if (ndi_prop_update_int(DDI_DEV_T_NONE, dip, "max-frame-size",
1007 	    cba->max_frame_size) != DDI_SUCCESS) {
1008 		DERR(NULL, "Failed to update max-frame-size property(dip=0x%p)",
1009 		    dip);
1010 		return (DDI_WALK_ERROR);
1011 	}
1012 
1013 	cba->dip = dip;
1014 	DBG1(NULL, "Returning dip=0x%p", dip);
1015 	return (DDI_WALK_TERMINATE);
1016 }
1017 
1018 
1019 /*
1020  * vdds_find_node -- A common function to find a NIU nexus or NIU node.
1021  */
1022 static dev_info_t *
1023 vdds_find_node(uint64_t cookie, dev_info_t *sdip,
1024 	int (*match_func)(dev_info_t *dip, void *arg))
1025 {
1026 	vdds_cb_arg_t arg;
1027 	dev_info_t *pdip;
1028 	int circ;
1029 
1030 	DBG1(NULL, "Called cookie=%lx\n", cookie);
1031 
1032 	arg.dip = NULL;
1033 	arg.cookie = cookie;
1034 
1035 	if (pdip = ddi_get_parent(sdip)) {
1036 		ndi_devi_enter(pdip, &circ);
1037 	}
1038 
1039 	ddi_walk_devs(sdip, match_func, (void *)&arg);
1040 	if (pdip != NULL) {
1041 		ndi_devi_exit(pdip, circ);
1042 	}
1043 
1044 	DBG1(NULL, "Returning dip=0x%p", arg.dip);
1045 	return (arg.dip);
1046 }
1047 
1048 /*
1049  * vdds_create_new_node -- A common function to create NIU nexus/NIU node.
1050  */
1051 static dev_info_t *
1052 vdds_create_new_node(vdds_cb_arg_t *cbap, dev_info_t *pdip,
1053     int (*new_node_func)(dev_info_t *dip, void *arg, uint_t flags))
1054 {
1055 	devi_branch_t br;
1056 	int rv;
1057 
1058 	DBG1(NULL, "Called cookie=0x%lx", cbap->cookie);
1059 
1060 	br.arg = (void *)cbap;
1061 	br.type = DEVI_BRANCH_SID;
1062 	br.create.sid_branch_create = new_node_func;
1063 	br.devi_branch_callback = NULL;
1064 
1065 	if (pdip == NULL) {
1066 		pdip = ddi_root_node();
1067 	}
1068 	DBG1(NULL, "calling e_ddi_branch_create");
1069 	if ((rv = e_ddi_branch_create(pdip, &br, NULL,
1070 	    DEVI_BRANCH_CHILD | DEVI_BRANCH_CONFIGURE))) {
1071 		DERR(NULL, "e_ddi_branch_create failed=%d", rv);
1072 		return (NULL);
1073 	}
1074 	DBG1(NULL, "Returning(dip=0x%p", cbap->dip);
1075 	return (cbap->dip);
1076 }
1077 
1078 /*
1079  * vdds_get_interrupts -- A function that binds ino's to channels and
1080  *	then provides them to create interrupts property.
1081  */
1082 static int
1083 vdds_get_interrupts(uint64_t cookie, int ino_range, int *intrs, int *nintr)
1084 {
1085 	uint32_t hvcookie = HVCOOKIE(cookie);
1086 	uint64_t txmap;
1087 	uint64_t rxmap;
1088 	uint32_t ino = VDDS_INO_RANGE_START(ino_range);
1089 	int rv;
1090 	uint64_t i;
1091 
1092 	*nintr = 0;
1093 	rv = vdds_hv_niu_vr_get_txmap(hvcookie, &txmap);
1094 	if (rv != H_EOK) {
1095 		DWARN(NULL, "Failed to get txmap for hvcookie=0x%X rv=%d\n",
1096 		    hvcookie, rv);
1097 		return (EIO);
1098 	}
1099 	rv = vdds_hv_niu_vr_get_rxmap(hvcookie, &rxmap);
1100 	if (rv != H_EOK) {
1101 		DWARN(NULL, "Failed to get rxmap for hvcookie=0x%X, rv=%d\n",
1102 		    hvcookie, rv);
1103 		return (EIO);
1104 	}
1105 	/* Check if the number of total channels to be more than 8 */
1106 	for (i = 0; i < 4; i++) {
1107 		if (rxmap & (((uint64_t)0x1) << i)) {
1108 			rv = vdds_hv_niu_vrrx_set_ino(hvcookie, i, ino);
1109 			if (rv != H_EOK) {
1110 				DWARN(NULL, "Failed to get Rx ino for "
1111 				    "hvcookie=0x%X vch_idx=0x%lx rv=%d\n",
1112 				    hvcookie, i, rv);
1113 				return (EIO);
1114 			}
1115 			DWARN(NULL,
1116 			    "hvcookie=0x%X RX vch_idx=0x%lx ino=0x%X\n",
1117 			    hvcookie, i, ino);
1118 			*intrs = ino;
1119 			ino++;
1120 		} else {
1121 			*intrs = VDDS_MAX_INTR_NUM;
1122 		}
1123 		intrs++;
1124 		*nintr += 1;
1125 	}
1126 	for (i = 0; i < 4; i++) {
1127 		if (txmap & (((uint64_t)0x1) << i)) {
1128 			rv = vdds_hv_niu_vrtx_set_ino(hvcookie, i, ino);
1129 			if (rv != H_EOK) {
1130 				DWARN(NULL, "Failed to get Tx ino for "
1131 				    "hvcookie=0x%X vch_idx=0x%lx rv=%d\n",
1132 				    hvcookie, i, rv);
1133 				return (EIO);
1134 			}
1135 			DWARN(NULL, "hvcookie=0x%X TX vch_idx=0x%lx ino=0x%X\n",
1136 			    hvcookie, i, ino);
1137 			*intrs = ino;
1138 			ino++;
1139 		} else {
1140 			*intrs = VDDS_MAX_INTR_NUM;
1141 		}
1142 		intrs++;
1143 		*nintr += 1;
1144 	}
1145 	return (0);
1146 }
1147 
1148 /*
1149  * vdds_release_range_prop -- cleanups an entry in the ranges property
1150  *	corresponding to a cookie.
1151  */
1152 static void
1153 vdds_release_range_prop(dev_info_t *nexus_dip, uint64_t cookie)
1154 {
1155 	vdds_ranges_t *prng;
1156 	vdds_ranges_t *prp;
1157 	int prnglen;
1158 	int nrng;
1159 	int rnum;
1160 	boolean_t success = B_FALSE;
1161 	int rv;
1162 
1163 	if ((rv = ddi_getlongprop(DDI_DEV_T_ANY, nexus_dip, DDI_PROP_DONTPASS,
1164 	    "ranges", (caddr_t)&prng, &prnglen)) != DDI_SUCCESS) {
1165 		DERR(NULL,
1166 		    "Failed to get nexus ranges property(dip=0x%p) rv=%d",
1167 		    nexus_dip, rv);
1168 		return;
1169 	}
1170 	nrng = prnglen/(sizeof (vdds_ranges_t));
1171 	for (rnum = 0; rnum < nrng; rnum++) {
1172 		prp = &prng[rnum];
1173 		if (prp->child_hi == HVCOOKIE(cookie)) {
1174 			prp->child_hi = 0;
1175 			success = B_TRUE;
1176 			break;
1177 		}
1178 	}
1179 	if (success) {
1180 		if (ndi_prop_update_int_array(DDI_DEV_T_NONE, nexus_dip,
1181 		    "ranges", (int *)prng, (nrng * 6)) != DDI_SUCCESS) {
1182 			DERR(NULL,
1183 			    "Failed to update nexus ranges prop(dip=0x%p)",
1184 			    nexus_dip);
1185 		}
1186 	}
1187 }
1188