kern_ndis.c revision 146427 
1/*-
2 * Copyright (c) 2003
3 *	Bill Paul <wpaul@windriver.com>.  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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/compat/ndis/kern_ndis.c 146427 2005-05-20 04:00:50Z wpaul $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/unistd.h>
39#include <sys/types.h>
40#include <sys/errno.h>
41#include <sys/callout.h>
42#include <sys/socket.h>
43#include <sys/queue.h>
44#include <sys/sysctl.h>
45#include <sys/proc.h>
46#include <sys/malloc.h>
47#include <sys/lock.h>
48#include <sys/mutex.h>
49#include <sys/conf.h>
50
51#include <sys/kernel.h>
52#include <sys/module.h>
53#include <sys/kthread.h>
54#include <machine/bus.h>
55#include <machine/resource.h>
56#include <sys/bus.h>
57#include <sys/rman.h>
58
59#include <net/if.h>
60#include <net/if_arp.h>
61#include <net/ethernet.h>
62#include <net/if_dl.h>
63#include <net/if_media.h>
64
65#include <net80211/ieee80211_var.h>
66#include <net80211/ieee80211_ioctl.h>
67
68#include <compat/ndis/pe_var.h>
69#include <compat/ndis/cfg_var.h>
70#include <compat/ndis/resource_var.h>
71#include <compat/ndis/ntoskrnl_var.h>
72#include <compat/ndis/ndis_var.h>
73#include <compat/ndis/hal_var.h>
74#include <compat/ndis/usbd_var.h>
75#include <dev/if_ndis/if_ndisvar.h>
76
77#define NDIS_DUMMY_PATH "\\\\some\\bogus\\path"
78
79static void ndis_status_func(ndis_handle, ndis_status, void *, uint32_t);
80static void ndis_statusdone_func(ndis_handle);
81static void ndis_setdone_func(ndis_handle, ndis_status);
82static void ndis_getdone_func(ndis_handle, ndis_status);
83static void ndis_resetdone_func(ndis_handle, ndis_status, uint8_t);
84static void ndis_sendrsrcavail_func(ndis_handle);
85static void ndis_intrhand(kdpc *, device_object *,
86	irp *, struct ndis_softc *);
87static void ndis_return(kdpc *, void *, void *, void *);
88
89static image_patch_table kernndis_functbl[] = {
90	IMPORT_SFUNC(ndis_status_func, 4),
91	IMPORT_SFUNC(ndis_statusdone_func, 1),
92	IMPORT_SFUNC(ndis_setdone_func, 2),
93	IMPORT_SFUNC(ndis_getdone_func, 2),
94	IMPORT_SFUNC(ndis_resetdone_func, 3),
95	IMPORT_SFUNC(ndis_sendrsrcavail_func, 1),
96	IMPORT_SFUNC(ndis_intrhand, 4),
97	IMPORT_SFUNC(ndis_return, 1),
98
99	{ NULL, NULL, NULL }
100};
101
102struct nd_head ndis_devhead;
103
104static struct mtx ndis_req_mtx;
105
106/*
107 * This allows us to export our symbols to other modules.
108 * Note that we call ourselves 'ndisapi' to avoid a namespace
109 * collision with if_ndis.ko, which internally calls itself
110 * 'ndis.'
111 */
112
113static int
114ndis_modevent(module_t mod, int cmd, void *arg)
115{
116	int			error = 0;
117	image_patch_table	*patch;
118
119	switch (cmd) {
120	case MOD_LOAD:
121		/* Initialize subsystems */
122		windrv_libinit();
123		hal_libinit();
124		ndis_libinit();
125		ntoskrnl_libinit();
126		usbd_libinit();
127
128		patch = kernndis_functbl;
129		while (patch->ipt_func != NULL) {
130			windrv_wrap((funcptr)patch->ipt_func,
131			    (funcptr *)&patch->ipt_wrap,
132			    patch->ipt_argcnt, patch->ipt_ftype);
133			patch++;
134		}
135
136		TAILQ_INIT(&ndis_devhead);
137
138		mtx_init(&ndis_req_mtx, "NDIS request lock",
139		    MTX_NDIS_LOCK, MTX_DEF);
140
141		break;
142	case MOD_SHUTDOWN:
143		if (TAILQ_FIRST(&ndis_devhead) == NULL) {
144			/* Shut down subsystems */
145			hal_libfini();
146			ndis_libfini();
147			ntoskrnl_libfini();
148			usbd_libfini();
149			windrv_libfini();
150
151			patch = kernndis_functbl;
152			while (patch->ipt_func != NULL) {
153				windrv_unwrap(patch->ipt_wrap);
154				patch++;
155			}
156			mtx_destroy(&ndis_req_mtx);
157		}
158		break;
159	case MOD_UNLOAD:
160		/* Shut down subsystems */
161		hal_libfini();
162		ndis_libfini();
163		ntoskrnl_libfini();
164		usbd_libfini();
165		windrv_libfini();
166
167		patch = kernndis_functbl;
168		while (patch->ipt_func != NULL) {
169			windrv_unwrap(patch->ipt_wrap);
170			patch++;
171		}
172
173		mtx_destroy(&ndis_req_mtx);
174
175		break;
176	default:
177		error = EINVAL;
178		break;
179	}
180
181	return(error);
182}
183DEV_MODULE(ndisapi, ndis_modevent, NULL);
184MODULE_VERSION(ndisapi, 1);
185
186int
187ndis_thsuspend(p, m, timo)
188	struct proc		*p;
189	struct mtx		*m;
190	int			timo;
191{
192	int			error;
193
194	if (m != NULL) {
195		error = msleep(&p->p_siglist, m,
196		    curthread->td_priority, "ndissp", timo);
197	} else {
198		PROC_LOCK(p);
199		error = msleep(&p->p_siglist, &p->p_mtx,
200		    curthread->td_priority|PDROP, "ndissp", timo);
201	}
202
203	return(error);
204}
205
206void
207ndis_thresume(p)
208	struct proc		*p;
209{
210	wakeup(&p->p_siglist);
211	return;
212}
213
214static void
215ndis_sendrsrcavail_func(adapter)
216	ndis_handle		adapter;
217{
218	return;
219}
220
221static void
222ndis_status_func(adapter, status, sbuf, slen)
223	ndis_handle		adapter;
224	ndis_status		status;
225	void			*sbuf;
226	uint32_t		slen;
227{
228	ndis_miniport_block	*block;
229	struct ndis_softc	*sc;
230	struct ifnet		*ifp;
231
232	block = adapter;
233	sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
234	ifp = &sc->arpcom.ac_if;
235	if (ifp->if_flags & IFF_DEBUG)
236		device_printf (sc->ndis_dev, "status: %x\n", status);
237	return;
238}
239
240static void
241ndis_statusdone_func(adapter)
242	ndis_handle		adapter;
243{
244	ndis_miniport_block	*block;
245	struct ndis_softc	*sc;
246	struct ifnet		*ifp;
247
248	block = adapter;
249	sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
250	ifp = &sc->arpcom.ac_if;
251	if (ifp->if_flags & IFF_DEBUG)
252		device_printf (sc->ndis_dev, "status complete\n");
253	return;
254}
255
256static void
257ndis_setdone_func(adapter, status)
258	ndis_handle		adapter;
259	ndis_status		status;
260{
261	ndis_miniport_block	*block;
262	block = adapter;
263
264	block->nmb_setstat = status;
265	wakeup(&block->nmb_setstat);
266	return;
267}
268
269static void
270ndis_getdone_func(adapter, status)
271	ndis_handle		adapter;
272	ndis_status		status;
273{
274	ndis_miniport_block	*block;
275	block = adapter;
276
277	block->nmb_getstat = status;
278	wakeup(&block->nmb_getstat);
279	return;
280}
281
282static void
283ndis_resetdone_func(adapter, status, addressingreset)
284	ndis_handle		adapter;
285	ndis_status		status;
286	uint8_t			addressingreset;
287{
288	ndis_miniport_block	*block;
289	struct ndis_softc	*sc;
290	struct ifnet		*ifp;
291
292	block = adapter;
293	sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
294	ifp = &sc->arpcom.ac_if;
295
296	if (ifp->if_flags & IFF_DEBUG)
297		device_printf (sc->ndis_dev, "reset done...\n");
298	wakeup(sc);
299	return;
300}
301
302int
303ndis_create_sysctls(arg)
304	void			*arg;
305{
306	struct ndis_softc	*sc;
307	ndis_cfg		*vals;
308	char			buf[256];
309	struct sysctl_oid	*oidp;
310	struct sysctl_ctx_entry	*e;
311
312	if (arg == NULL)
313		return(EINVAL);
314
315	sc = arg;
316	vals = sc->ndis_regvals;
317
318	TAILQ_INIT(&sc->ndis_cfglist_head);
319
320#if __FreeBSD_version < 502113
321	/* Create the sysctl tree. */
322
323	sc->ndis_tree = SYSCTL_ADD_NODE(&sc->ndis_ctx,
324	    SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
325	    device_get_nameunit(sc->ndis_dev), CTLFLAG_RD, 0,
326	    device_get_desc(sc->ndis_dev));
327
328#endif
329	/* Add the driver-specific registry keys. */
330
331	vals = sc->ndis_regvals;
332	while(1) {
333		if (vals->nc_cfgkey == NULL)
334			break;
335
336		if (vals->nc_idx != sc->ndis_devidx) {
337			vals++;
338			continue;
339		}
340
341		/* See if we already have a sysctl with this name */
342
343		oidp = NULL;
344#if __FreeBSD_version < 502113
345		TAILQ_FOREACH(e, &sc->ndis_ctx, link) {
346#else
347		TAILQ_FOREACH(e, device_get_sysctl_ctx(sc->ndis_dev), link) {
348#endif
349                	oidp = e->entry;
350			if (ndis_strcasecmp(oidp->oid_name,
351			    vals->nc_cfgkey) == 0)
352				break;
353			oidp = NULL;
354		}
355
356		if (oidp != NULL) {
357			vals++;
358			continue;
359		}
360
361#if __FreeBSD_version < 502113
362		SYSCTL_ADD_STRING(&sc->ndis_ctx,
363		    SYSCTL_CHILDREN(sc->ndis_tree),
364#else
365		SYSCTL_ADD_STRING(device_get_sysctl_ctx(sc->ndis_dev),
366		    SYSCTL_CHILDREN(device_get_sysctl_tree(sc->ndis_dev)),
367#endif
368		    OID_AUTO, vals->nc_cfgkey,
369		    CTLFLAG_RW, vals->nc_val,
370		    sizeof(vals->nc_val),
371		    vals->nc_cfgdesc);
372		vals++;
373	}
374
375	/* Now add a couple of builtin keys. */
376
377	/*
378	 * Environment can be either Windows (0) or WindowsNT (1).
379	 * We qualify as the latter.
380	 */
381	ndis_add_sysctl(sc, "Environment",
382	    "Windows environment", "1", CTLFLAG_RD);
383
384	/* NDIS version should be 5.1. */
385	ndis_add_sysctl(sc, "NdisVersion",
386	    "NDIS API Version", "0x00050001", CTLFLAG_RD);
387
388	/* Bus type (PCI, PCMCIA, etc...) */
389	sprintf(buf, "%d", (int)sc->ndis_iftype);
390	ndis_add_sysctl(sc, "BusType", "Bus Type", buf, CTLFLAG_RD);
391
392	if (sc->ndis_res_io != NULL) {
393		sprintf(buf, "0x%lx", rman_get_start(sc->ndis_res_io));
394		ndis_add_sysctl(sc, "IOBaseAddress",
395		    "Base I/O Address", buf, CTLFLAG_RD);
396	}
397
398	if (sc->ndis_irq != NULL) {
399		sprintf(buf, "%lu", rman_get_start(sc->ndis_irq));
400		ndis_add_sysctl(sc, "InterruptNumber",
401		    "Interrupt Number", buf, CTLFLAG_RD);
402	}
403
404	return(0);
405}
406
407int
408ndis_add_sysctl(arg, key, desc, val, flag)
409	void			*arg;
410	char			*key;
411	char			*desc;
412	char			*val;
413	int			flag;
414{
415	struct ndis_softc	*sc;
416	struct ndis_cfglist	*cfg;
417	char			descstr[256];
418
419	sc = arg;
420
421	cfg = malloc(sizeof(struct ndis_cfglist), M_DEVBUF, M_NOWAIT|M_ZERO);
422
423	if (cfg == NULL)
424		return(ENOMEM);
425
426	cfg->ndis_cfg.nc_cfgkey = strdup(key, M_DEVBUF);
427	if (desc == NULL) {
428		snprintf(descstr, sizeof(descstr), "%s (dynamic)", key);
429		cfg->ndis_cfg.nc_cfgdesc = strdup(descstr, M_DEVBUF);
430	} else
431		cfg->ndis_cfg.nc_cfgdesc = strdup(desc, M_DEVBUF);
432	strcpy(cfg->ndis_cfg.nc_val, val);
433
434	TAILQ_INSERT_TAIL(&sc->ndis_cfglist_head, cfg, link);
435
436#if __FreeBSD_version < 502113
437	SYSCTL_ADD_STRING(&sc->ndis_ctx, SYSCTL_CHILDREN(sc->ndis_tree),
438#else
439	SYSCTL_ADD_STRING(device_get_sysctl_ctx(sc->ndis_dev),
440	    SYSCTL_CHILDREN(device_get_sysctl_tree(sc->ndis_dev)),
441#endif
442	    OID_AUTO, cfg->ndis_cfg.nc_cfgkey, flag,
443	    cfg->ndis_cfg.nc_val, sizeof(cfg->ndis_cfg.nc_val),
444	    cfg->ndis_cfg.nc_cfgdesc);
445
446	return(0);
447}
448
449int
450ndis_flush_sysctls(arg)
451	void			*arg;
452{
453	struct ndis_softc	*sc;
454	struct ndis_cfglist	*cfg;
455
456	sc = arg;
457
458	while (!TAILQ_EMPTY(&sc->ndis_cfglist_head)) {
459		cfg = TAILQ_FIRST(&sc->ndis_cfglist_head);
460		TAILQ_REMOVE(&sc->ndis_cfglist_head, cfg, link);
461		free(cfg->ndis_cfg.nc_cfgkey, M_DEVBUF);
462		free(cfg->ndis_cfg.nc_cfgdesc, M_DEVBUF);
463		free(cfg, M_DEVBUF);
464	}
465
466	return(0);
467}
468
469static void
470ndis_return(dpc, arg, sysarg1, sysarg2)
471	kdpc			*dpc;
472	void			*arg;
473	void			*sysarg1;
474	void			*sysarg2;
475{
476	struct ndis_softc	*sc;
477	ndis_return_handler	returnfunc;
478	ndis_handle		adapter;
479	ndis_packet		*p;
480	uint8_t			irql;
481
482	p = arg;
483	sc = p->np_softc;
484	adapter = sc->ndis_block->nmb_miniportadapterctx;
485
486	if (adapter == NULL)
487		return;
488
489	returnfunc = sc->ndis_chars->nmc_return_packet_func;
490
491	KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
492	MSCALL2(returnfunc, adapter, p);
493	KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
494
495	return;
496}
497
498void
499ndis_return_packet(buf, arg)
500	void			*buf;	/* not used */
501	void			*arg;
502{
503	ndis_packet		*p;
504
505	if (arg == NULL)
506		return;
507
508	p = arg;
509
510	/* Decrement refcount. */
511	p->np_refcnt--;
512
513	/* Release packet when refcount hits zero, otherwise return. */
514	if (p->np_refcnt)
515		return;
516
517	KeInitializeDpc(&p->np_dpc, kernndis_functbl[7].ipt_wrap, p);
518	KeInsertQueueDpc(&p->np_dpc, NULL, NULL);
519
520	return;
521}
522
523void
524ndis_free_bufs(b0)
525	ndis_buffer		*b0;
526{
527	ndis_buffer		*next;
528
529	if (b0 == NULL)
530		return;
531
532	while(b0 != NULL) {
533		next = b0->mdl_next;
534		IoFreeMdl(b0);
535		b0 = next;
536	}
537
538	return;
539}
540int in_reset = 0;
541void
542ndis_free_packet(p)
543	ndis_packet		*p;
544{
545	if (p == NULL)
546		return;
547
548	ndis_free_bufs(p->np_private.npp_head);
549	NdisFreePacket(p);
550	return;
551}
552
553int
554ndis_convert_res(arg)
555	void			*arg;
556{
557	struct ndis_softc	*sc;
558	ndis_resource_list	*rl = NULL;
559	cm_partial_resource_desc	*prd = NULL;
560	ndis_miniport_block	*block;
561	device_t		dev;
562	struct resource_list	*brl;
563	struct resource_list_entry	*brle;
564#if __FreeBSD_version < 600022
565	struct resource_list	brl_rev;
566	struct resource_list_entry	*n;
567#endif
568	int 			error = 0;
569
570	sc = arg;
571	block = sc->ndis_block;
572	dev = sc->ndis_dev;
573
574#if __FreeBSD_version < 600022
575	SLIST_INIT(&brl_rev);
576#endif
577
578	rl = malloc(sizeof(ndis_resource_list) +
579	    (sizeof(cm_partial_resource_desc) * (sc->ndis_rescnt - 1)),
580	    M_DEVBUF, M_NOWAIT|M_ZERO);
581
582	if (rl == NULL)
583		return(ENOMEM);
584
585	rl->cprl_version = 5;
586	rl->cprl_version = 1;
587	rl->cprl_count = sc->ndis_rescnt;
588	prd = rl->cprl_partial_descs;
589
590	brl = BUS_GET_RESOURCE_LIST(dev, dev);
591
592	if (brl != NULL) {
593
594#if __FreeBSD_version < 600022
595		/*
596		 * We have a small problem. Some PCI devices have
597		 * multiple I/O ranges. Windows orders them starting
598		 * from lowest numbered BAR to highest. We discover
599		 * them in that order too, but insert them into a singly
600		 * linked list head first, which means when time comes
601		 * to traverse the list, we enumerate them in reverse
602		 * order. This screws up some drivers which expect the
603		 * BARs to be in ascending order so that they can choose
604		 * the "first" one as their register space. Unfortunately,
605		 * in order to fix this, we have to create our own
606		 * temporary list with the entries in reverse order.
607		 */
608
609		SLIST_FOREACH(brle, brl, link) {
610			n = malloc(sizeof(struct resource_list_entry),
611			    M_TEMP, M_NOWAIT);
612			if (n == NULL) {
613				error = ENOMEM;
614				goto bad;
615			}
616			bcopy((char *)brle, (char *)n,
617			    sizeof(struct resource_list_entry));
618			SLIST_INSERT_HEAD(&brl_rev, n, link);
619		}
620
621		SLIST_FOREACH(brle, &brl_rev, link) {
622#else
623		STAILQ_FOREACH(brle, brl, link) {
624#endif
625			switch (brle->type) {
626			case SYS_RES_IOPORT:
627				prd->cprd_type = CmResourceTypePort;
628				prd->cprd_flags = CM_RESOURCE_PORT_IO;
629				prd->cprd_sharedisp =
630				    CmResourceShareDeviceExclusive;
631				prd->u.cprd_port.cprd_start.np_quad =
632				    brle->start;
633				prd->u.cprd_port.cprd_len = brle->count;
634				break;
635			case SYS_RES_MEMORY:
636				prd->cprd_type = CmResourceTypeMemory;
637				prd->cprd_flags =
638				    CM_RESOURCE_MEMORY_READ_WRITE;
639				prd->cprd_sharedisp =
640				    CmResourceShareDeviceExclusive;
641				prd->u.cprd_port.cprd_start.np_quad =
642				    brle->start;
643				prd->u.cprd_port.cprd_len = brle->count;
644				break;
645			case SYS_RES_IRQ:
646				prd->cprd_type = CmResourceTypeInterrupt;
647				prd->cprd_flags = 0;
648				prd->cprd_sharedisp =
649				    CmResourceShareDeviceExclusive;
650				prd->u.cprd_intr.cprd_level = brle->start;
651				prd->u.cprd_intr.cprd_vector = brle->start;
652				prd->u.cprd_intr.cprd_affinity = 0;
653				break;
654			default:
655				break;
656			}
657			prd++;
658		}
659	}
660
661	block->nmb_rlist = rl;
662
663#if __FreeBSD_version < 600022
664bad:
665
666	while (!SLIST_EMPTY(&brl_rev)) {
667		n = SLIST_FIRST(&brl_rev);
668		SLIST_REMOVE_HEAD(&brl_rev, link);
669		free (n, M_TEMP);
670	}
671#endif
672
673	return(error);
674}
675
676/*
677 * Map an NDIS packet to an mbuf list. When an NDIS driver receives a
678 * packet, it will hand it to us in the form of an ndis_packet,
679 * which we need to convert to an mbuf that is then handed off
680 * to the stack. Note: we configure the mbuf list so that it uses
681 * the memory regions specified by the ndis_buffer structures in
682 * the ndis_packet as external storage. In most cases, this will
683 * point to a memory region allocated by the driver (either by
684 * ndis_malloc_withtag() or ndis_alloc_sharedmem()). We expect
685 * the driver to handle free()ing this region for is, so we set up
686 * a dummy no-op free handler for it.
687 */
688
689int
690ndis_ptom(m0, p)
691	struct mbuf		**m0;
692	ndis_packet		*p;
693{
694	struct mbuf		*m, *prev = NULL;
695	ndis_buffer		*buf;
696	ndis_packet_private	*priv;
697	uint32_t		totlen = 0;
698
699	if (p == NULL || m0 == NULL)
700		return(EINVAL);
701
702	priv = &p->np_private;
703	buf = priv->npp_head;
704	p->np_refcnt = 0;
705
706	for (buf = priv->npp_head; buf != NULL; buf = buf->mdl_next) {
707		if (buf == priv->npp_head)
708			MGETHDR(m, M_DONTWAIT, MT_HEADER);
709		else
710			MGET(m, M_DONTWAIT, MT_DATA);
711		if (m == NULL) {
712			m_freem(*m0);
713			*m0 = NULL;
714			return(ENOBUFS);
715		}
716		m->m_len = MmGetMdlByteCount(buf);
717		m->m_data = MmGetMdlVirtualAddress(buf);
718		MEXTADD(m, m->m_data, m->m_len, ndis_return_packet,
719		    p, 0, EXT_NDIS);
720		p->np_refcnt++;
721		totlen += m->m_len;
722		if (m->m_flags & MT_HEADER)
723			*m0 = m;
724		else
725			prev->m_next = m;
726		prev = m;
727	}
728
729	(*m0)->m_pkthdr.len = totlen;
730
731	return(0);
732}
733
734/*
735 * Create an NDIS packet from an mbuf chain.
736 * This is used mainly when transmitting packets, where we need
737 * to turn an mbuf off an interface's send queue and transform it
738 * into an NDIS packet which will be fed into the NDIS driver's
739 * send routine.
740 *
741 * NDIS packets consist of two parts: an ndis_packet structure,
742 * which is vaguely analagous to the pkthdr portion of an mbuf,
743 * and one or more ndis_buffer structures, which define the
744 * actual memory segments in which the packet data resides.
745 * We need to allocate one ndis_buffer for each mbuf in a chain,
746 * plus one ndis_packet as the header.
747 */
748
749int
750ndis_mtop(m0, p)
751	struct mbuf		*m0;
752	ndis_packet		**p;
753{
754	struct mbuf		*m;
755	ndis_buffer		*buf = NULL, *prev = NULL;
756	ndis_packet_private	*priv;
757
758	if (p == NULL || *p == NULL || m0 == NULL)
759		return(EINVAL);
760
761	priv = &(*p)->np_private;
762	priv->npp_totlen = m0->m_pkthdr.len;
763
764	for (m = m0; m != NULL; m = m->m_next) {
765		if (m->m_len == 0)
766			continue;
767		buf = IoAllocateMdl(m->m_data, m->m_len, FALSE, FALSE, NULL);
768		if (buf == NULL) {
769			ndis_free_packet(*p);
770			*p = NULL;
771			return(ENOMEM);
772		}
773
774		if (priv->npp_head == NULL)
775			priv->npp_head = buf;
776		else
777			prev->mdl_next = buf;
778		prev = buf;
779	}
780
781	priv->npp_tail = buf;
782
783	return(0);
784}
785
786int
787ndis_get_supported_oids(arg, oids, oidcnt)
788	void			*arg;
789	ndis_oid		**oids;
790	int			*oidcnt;
791{
792	int			len, rval;
793	ndis_oid		*o;
794
795	if (arg == NULL || oids == NULL || oidcnt == NULL)
796		return(EINVAL);
797	len = 0;
798	ndis_get_info(arg, OID_GEN_SUPPORTED_LIST, NULL, &len);
799
800	o = malloc(len, M_DEVBUF, M_NOWAIT);
801	if (o == NULL)
802		return(ENOMEM);
803
804	rval = ndis_get_info(arg, OID_GEN_SUPPORTED_LIST, o, &len);
805
806	if (rval) {
807		free(o, M_DEVBUF);
808		return(rval);
809	}
810
811	*oids = o;
812	*oidcnt = len / 4;
813
814	return(0);
815}
816
817int
818ndis_set_info(arg, oid, buf, buflen)
819	void			*arg;
820	ndis_oid		oid;
821	void			*buf;
822	int			*buflen;
823{
824	struct ndis_softc	*sc;
825	ndis_status		rval;
826	ndis_handle		adapter;
827	ndis_setinfo_handler	setfunc;
828	uint32_t		byteswritten = 0, bytesneeded = 0;
829	int			error;
830	uint8_t			irql;
831
832	/*
833	 * According to the NDIS spec, MiniportQueryInformation()
834	 * and MiniportSetInformation() requests are handled serially:
835	 * once one request has been issued, we must wait for it to
836 	 * finish before allowing another request to proceed.
837	 */
838
839	sc = arg;
840
841	KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
842
843	if (sc->ndis_block->nmb_pendingreq != NULL)
844		panic("ndis_set_info() called while other request pending");
845	else
846		sc->ndis_block->nmb_pendingreq = (ndis_request *)sc;
847
848	NDIS_LOCK(sc);
849	setfunc = sc->ndis_chars->nmc_setinfo_func;
850	adapter = sc->ndis_block->nmb_miniportadapterctx;
851
852	if (adapter == NULL || setfunc == NULL ||
853	    sc->ndis_block->nmb_devicectx == NULL) {
854		sc->ndis_block->nmb_pendingreq = NULL;
855		NDIS_UNLOCK(sc);
856		KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
857		return(ENXIO);
858	}
859
860	NDIS_UNLOCK(sc);
861
862	rval = MSCALL6(setfunc, adapter, oid, buf, *buflen,
863	    &byteswritten, &bytesneeded);
864
865	sc->ndis_block->nmb_pendingreq = NULL;
866
867	KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
868
869	if (rval == NDIS_STATUS_PENDING) {
870		mtx_lock(&ndis_req_mtx);
871		error = msleep(&sc->ndis_block->nmb_setstat,
872		    &ndis_req_mtx,
873		    curthread->td_priority|PDROP,
874		    "ndisset", 5 * hz);
875		rval = sc->ndis_block->nmb_setstat;
876	}
877
878
879	if (byteswritten)
880		*buflen = byteswritten;
881	if (bytesneeded)
882		*buflen = bytesneeded;
883
884	if (rval == NDIS_STATUS_INVALID_LENGTH)
885		return(ENOSPC);
886
887	if (rval == NDIS_STATUS_INVALID_OID)
888		return(EINVAL);
889
890	if (rval == NDIS_STATUS_NOT_SUPPORTED ||
891	    rval == NDIS_STATUS_NOT_ACCEPTED)
892		return(ENOTSUP);
893
894	if (rval != NDIS_STATUS_SUCCESS)
895		return(ENODEV);
896
897	return(0);
898}
899
900typedef void (*ndis_senddone_func)(ndis_handle, ndis_packet *, ndis_status);
901
902int
903ndis_send_packets(arg, packets, cnt)
904	void			*arg;
905	ndis_packet		**packets;
906	int			cnt;
907{
908	struct ndis_softc	*sc;
909	ndis_handle		adapter;
910	ndis_sendmulti_handler	sendfunc;
911	ndis_senddone_func		senddonefunc;
912	int			i;
913	ndis_packet		*p;
914	uint8_t			irql;
915
916	sc = arg;
917	adapter = sc->ndis_block->nmb_miniportadapterctx;
918	if (adapter == NULL)
919		return(ENXIO);
920	sendfunc = sc->ndis_chars->nmc_sendmulti_func;
921	senddonefunc = sc->ndis_block->nmb_senddone_func;
922
923	if (NDIS_SERIALIZED(sc->ndis_block))
924		KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
925
926	MSCALL3(sendfunc, adapter, packets, cnt);
927
928	for (i = 0; i < cnt; i++) {
929		p = packets[i];
930		/*
931		 * Either the driver already handed the packet to
932		 * ndis_txeof() due to a failure, or it wants to keep
933		 * it and release it asynchronously later. Skip to the
934		 * next one.
935		 */
936		if (p == NULL || p->np_oob.npo_status == NDIS_STATUS_PENDING)
937			continue;
938		MSCALL3(senddonefunc, sc->ndis_block, p, p->np_oob.npo_status);
939	}
940
941	if (NDIS_SERIALIZED(sc->ndis_block))
942		KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
943
944	return(0);
945}
946
947int
948ndis_send_packet(arg, packet)
949	void			*arg;
950	ndis_packet		*packet;
951{
952	struct ndis_softc	*sc;
953	ndis_handle		adapter;
954	ndis_status		status;
955	ndis_sendsingle_handler	sendfunc;
956	ndis_senddone_func		senddonefunc;
957	uint8_t			irql;
958
959	sc = arg;
960	adapter = sc->ndis_block->nmb_miniportadapterctx;
961	if (adapter == NULL)
962		return(ENXIO);
963	sendfunc = sc->ndis_chars->nmc_sendsingle_func;
964	senddonefunc = sc->ndis_block->nmb_senddone_func;
965
966	if (NDIS_SERIALIZED(sc->ndis_block))
967		KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
968	status = MSCALL3(sendfunc, adapter, packet,
969	    packet->np_private.npp_flags);
970
971	if (status == NDIS_STATUS_PENDING) {
972		if (NDIS_SERIALIZED(sc->ndis_block))
973			KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
974		return(0);
975	}
976
977	MSCALL3(senddonefunc, sc->ndis_block, packet, status);
978
979	if (NDIS_SERIALIZED(sc->ndis_block))
980		KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
981
982	return(0);
983}
984
985int
986ndis_init_dma(arg)
987	void			*arg;
988{
989	struct ndis_softc	*sc;
990	int			i, error;
991
992	sc = arg;
993
994	sc->ndis_tmaps = malloc(sizeof(bus_dmamap_t) * sc->ndis_maxpkts,
995	    M_DEVBUF, M_NOWAIT|M_ZERO);
996
997	if (sc->ndis_tmaps == NULL)
998		return(ENOMEM);
999
1000	for (i = 0; i < sc->ndis_maxpkts; i++) {
1001		error = bus_dmamap_create(sc->ndis_ttag, 0,
1002		    &sc->ndis_tmaps[i]);
1003		if (error) {
1004			free(sc->ndis_tmaps, M_DEVBUF);
1005			return(ENODEV);
1006		}
1007	}
1008
1009	return(0);
1010}
1011
1012int
1013ndis_destroy_dma(arg)
1014	void			*arg;
1015{
1016	struct ndis_softc	*sc;
1017	struct mbuf		*m;
1018	ndis_packet		*p = NULL;
1019	int			i;
1020
1021	sc = arg;
1022
1023	for (i = 0; i < sc->ndis_maxpkts; i++) {
1024		if (sc->ndis_txarray[i] != NULL) {
1025			p = sc->ndis_txarray[i];
1026			m = (struct mbuf *)p->np_rsvd[1];
1027			if (m != NULL)
1028				m_freem(m);
1029			ndis_free_packet(sc->ndis_txarray[i]);
1030		}
1031		bus_dmamap_destroy(sc->ndis_ttag, sc->ndis_tmaps[i]);
1032	}
1033
1034	free(sc->ndis_tmaps, M_DEVBUF);
1035
1036	bus_dma_tag_destroy(sc->ndis_ttag);
1037
1038	return(0);
1039}
1040
1041int
1042ndis_reset_nic(arg)
1043	void			*arg;
1044{
1045	struct ndis_softc	*sc;
1046	ndis_handle		adapter;
1047	ndis_reset_handler	resetfunc;
1048	uint8_t			addressing_reset;
1049	int			rval;
1050	uint8_t			irql;
1051
1052	sc = arg;
1053
1054	NDIS_LOCK(sc);
1055	adapter = sc->ndis_block->nmb_miniportadapterctx;
1056	resetfunc = sc->ndis_chars->nmc_reset_func;
1057
1058	if (adapter == NULL || resetfunc == NULL ||
1059	    sc->ndis_block->nmb_devicectx == NULL) {
1060		NDIS_UNLOCK(sc);
1061		return(EIO);
1062	}
1063
1064	NDIS_UNLOCK(sc);
1065
1066	if (NDIS_SERIALIZED(sc->ndis_block))
1067		KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
1068
1069	rval = MSCALL2(resetfunc, &addressing_reset, adapter);
1070
1071	if (NDIS_SERIALIZED(sc->ndis_block))
1072		KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
1073
1074	if (rval == NDIS_STATUS_PENDING) {
1075		mtx_lock(&ndis_req_mtx);
1076		msleep(sc, &ndis_req_mtx,
1077		    curthread->td_priority|PDROP, "ndisrst", 0);
1078	}
1079
1080	return(0);
1081}
1082
1083#define NDIS_REAP_TIMERS
1084
1085int
1086ndis_halt_nic(arg)
1087	void			*arg;
1088{
1089	struct ndis_softc	*sc;
1090	ndis_handle		adapter;
1091	ndis_halt_handler	haltfunc;
1092#ifdef NDIS_REAP_TIMERS
1093	ndis_miniport_timer	*t, *n;
1094#endif
1095
1096	sc = arg;
1097
1098#ifdef NDIS_REAP_TIMERS
1099	/*
1100	 * Drivers are sometimes very lax about cancelling all
1101	 * their timers. Cancel them all ourselves, just to be
1102	 * safe. We must do this before invoking MiniportHalt(),
1103	 * since if we wait until after, the memory in which
1104	 * the timers reside will no longer be valid.
1105	 */
1106
1107	t = sc->ndis_block->nmb_timerlist;
1108	while (t != NULL) {
1109		KeCancelTimer(&t->nmt_ktimer);
1110		n = t;
1111		t = t->nmt_nexttimer;
1112		n->nmt_nexttimer = NULL;
1113	}
1114	sc->ndis_block->nmb_timerlist = NULL;
1115	if (!cold)
1116		KeFlushQueuedDpcs();
1117#endif
1118
1119	NDIS_LOCK(sc);
1120	adapter = sc->ndis_block->nmb_miniportadapterctx;
1121	if (adapter == NULL) {
1122		NDIS_UNLOCK(sc);
1123		return(EIO);
1124	}
1125
1126	sc->ndis_block->nmb_miniportadapterctx = NULL;
1127	sc->ndis_block->nmb_devicectx = NULL;
1128
1129	/*
1130	 * The adapter context is only valid after the init
1131	 * handler has been called, and is invalid once the
1132	 * halt handler has been called.
1133	 */
1134
1135	haltfunc = sc->ndis_chars->nmc_halt_func;
1136	NDIS_UNLOCK(sc);
1137
1138	MSCALL1(haltfunc, adapter);
1139
1140	return(0);
1141}
1142
1143int
1144ndis_shutdown_nic(arg)
1145	void			*arg;
1146{
1147	struct ndis_softc	*sc;
1148	ndis_handle		adapter;
1149	ndis_shutdown_handler	shutdownfunc;
1150
1151	sc = arg;
1152	NDIS_LOCK(sc);
1153	adapter = sc->ndis_block->nmb_miniportadapterctx;
1154	shutdownfunc = sc->ndis_chars->nmc_shutdown_handler;
1155	NDIS_UNLOCK(sc);
1156	if (adapter == NULL || shutdownfunc == NULL)
1157		return(EIO);
1158
1159	if (sc->ndis_chars->nmc_rsvd0 == NULL)
1160		MSCALL1(shutdownfunc, adapter);
1161	else
1162		MSCALL1(shutdownfunc, sc->ndis_chars->nmc_rsvd0);
1163
1164	TAILQ_REMOVE(&ndis_devhead, sc->ndis_block, link);
1165
1166	return(0);
1167}
1168
1169int
1170ndis_init_nic(arg)
1171	void			*arg;
1172{
1173	struct ndis_softc	*sc;
1174	ndis_miniport_block	*block;
1175        ndis_init_handler	initfunc;
1176	ndis_status		status, openstatus = 0;
1177	ndis_medium		mediumarray[NdisMediumMax];
1178	uint32_t		chosenmedium, i;
1179
1180	if (arg == NULL)
1181		return(EINVAL);
1182
1183	sc = arg;
1184	NDIS_LOCK(sc);
1185	block = sc->ndis_block;
1186	initfunc = sc->ndis_chars->nmc_init_func;
1187	NDIS_UNLOCK(sc);
1188
1189	sc->ndis_block->nmb_timerlist = NULL;
1190
1191	for (i = 0; i < NdisMediumMax; i++)
1192		mediumarray[i] = i;
1193
1194        status = MSCALL6(initfunc, &openstatus, &chosenmedium,
1195            mediumarray, NdisMediumMax, block, block);
1196
1197	/*
1198	 * If the init fails, blow away the other exported routines
1199	 * we obtained from the driver so we can't call them later.
1200	 * If the init failed, none of these will work.
1201	 */
1202	if (status != NDIS_STATUS_SUCCESS) {
1203		NDIS_LOCK(sc);
1204		sc->ndis_block->nmb_miniportadapterctx = NULL;
1205		NDIS_UNLOCK(sc);
1206		return(ENXIO);
1207	}
1208
1209	/*
1210	 * This may look really goofy, but apparently it is possible
1211	 * to halt a miniport too soon after it's been initialized.
1212	 * After MiniportInitialize() finishes, pause for 1 second
1213	 * to give the chip a chance to handle any short-lived timers
1214	 * that were set in motion. If we call MiniportHalt() too soon,
1215	 * some of the timers may not be cancelled, because the driver
1216	 * expects them to fire before the halt is called.
1217	 */
1218
1219	ndis_thsuspend(curthread->td_proc, NULL, hz);
1220
1221	NDIS_LOCK(sc);
1222	sc->ndis_block->nmb_devicectx = sc;
1223	NDIS_UNLOCK(sc);
1224
1225	return(0);
1226}
1227
1228void
1229ndis_enable_intr(arg)
1230	void			*arg;
1231{
1232	struct ndis_softc	*sc;
1233	ndis_handle		adapter;
1234	ndis_enable_interrupts_handler	intrenbfunc;
1235
1236	sc = arg;
1237	adapter = sc->ndis_block->nmb_miniportadapterctx;
1238	intrenbfunc = sc->ndis_chars->nmc_enable_interrupts_func;
1239	if (adapter == NULL || intrenbfunc == NULL)
1240		return;
1241	MSCALL1(intrenbfunc, adapter);
1242
1243	return;
1244}
1245
1246void
1247ndis_disable_intr(arg)
1248	void			*arg;
1249{
1250	struct ndis_softc	*sc;
1251	ndis_handle		adapter;
1252	ndis_disable_interrupts_handler	intrdisfunc;
1253
1254	sc = arg;
1255	adapter = sc->ndis_block->nmb_miniportadapterctx;
1256	intrdisfunc = sc->ndis_chars->nmc_disable_interrupts_func;
1257	if (adapter == NULL || intrdisfunc == NULL)
1258	    return;
1259
1260	MSCALL1(intrdisfunc, adapter);
1261
1262	return;
1263}
1264
1265int
1266ndis_isr(arg, ourintr, callhandler)
1267	void			*arg;
1268	int			*ourintr;
1269	int			*callhandler;
1270{
1271	struct ndis_softc	*sc;
1272	ndis_handle		adapter;
1273	ndis_isr_handler	isrfunc;
1274	uint8_t			accepted, queue;
1275
1276	if (arg == NULL || ourintr == NULL || callhandler == NULL)
1277		return(EINVAL);
1278
1279	sc = arg;
1280	adapter = sc->ndis_block->nmb_miniportadapterctx;
1281	isrfunc = sc->ndis_chars->nmc_isr_func;
1282
1283	if (adapter == NULL || isrfunc == NULL)
1284		return(ENXIO);
1285
1286	MSCALL3(isrfunc, &accepted, &queue, adapter);
1287
1288	*ourintr = accepted;
1289	*callhandler = queue;
1290
1291	return(0);
1292}
1293
1294static void
1295ndis_intrhand(dpc, dobj, ip, sc)
1296	kdpc			*dpc;
1297	device_object		*dobj;
1298	irp			*ip;
1299	struct ndis_softc	*sc;
1300{
1301	ndis_handle		adapter;
1302	ndis_interrupt_handler	intrfunc;
1303	uint8_t			irql;
1304
1305	adapter = sc->ndis_block->nmb_miniportadapterctx;
1306	intrfunc = sc->ndis_chars->nmc_interrupt_func;
1307
1308	if (adapter == NULL || intrfunc == NULL)
1309		return;
1310
1311	if (NDIS_SERIALIZED(sc->ndis_block))
1312		KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
1313
1314	MSCALL1(intrfunc, adapter);
1315
1316	/* If there's a MiniportEnableInterrupt() routine, call it. */
1317
1318	ndis_enable_intr(sc);
1319
1320	if (NDIS_SERIALIZED(sc->ndis_block))
1321		KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
1322
1323	return;
1324}
1325
1326int
1327ndis_get_info(arg, oid, buf, buflen)
1328	void			*arg;
1329	ndis_oid		oid;
1330	void			*buf;
1331	int			*buflen;
1332{
1333	struct ndis_softc	*sc;
1334	ndis_status		rval;
1335	ndis_handle		adapter;
1336	ndis_queryinfo_handler	queryfunc;
1337	uint32_t		byteswritten = 0, bytesneeded = 0;
1338	int			error;
1339	uint8_t			irql;
1340
1341	sc = arg;
1342
1343	KeAcquireSpinLock(&sc->ndis_block->nmb_lock, &irql);
1344
1345	if (sc->ndis_block->nmb_pendingreq != NULL)
1346		panic("ndis_get_info() called while other request pending");
1347	else
1348		sc->ndis_block->nmb_pendingreq = (ndis_request *)sc;
1349
1350	NDIS_LOCK(sc);
1351	queryfunc = sc->ndis_chars->nmc_queryinfo_func;
1352	adapter = sc->ndis_block->nmb_miniportadapterctx;
1353
1354	if (adapter == NULL || queryfunc == NULL ||
1355	    sc->ndis_block->nmb_devicectx == NULL) {
1356		sc->ndis_block->nmb_pendingreq = NULL;
1357		NDIS_UNLOCK(sc);
1358		KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
1359		return(ENXIO);
1360	}
1361
1362	NDIS_UNLOCK(sc);
1363
1364	rval = MSCALL6(queryfunc, adapter, oid, buf, *buflen,
1365	    &byteswritten, &bytesneeded);
1366
1367	sc->ndis_block->nmb_pendingreq = NULL;
1368
1369	KeReleaseSpinLock(&sc->ndis_block->nmb_lock, irql);
1370
1371	/* Wait for requests that block. */
1372
1373	if (rval == NDIS_STATUS_PENDING) {
1374		mtx_lock(&ndis_req_mtx);
1375		error = msleep(&sc->ndis_block->nmb_getstat,
1376		    &ndis_req_mtx,
1377		    curthread->td_priority|PDROP,
1378		    "ndisget", 5 * hz);
1379		rval = sc->ndis_block->nmb_getstat;
1380	}
1381
1382	if (byteswritten)
1383		*buflen = byteswritten;
1384	if (bytesneeded)
1385		*buflen = bytesneeded;
1386
1387	if (rval == NDIS_STATUS_INVALID_LENGTH ||
1388	    rval == NDIS_STATUS_BUFFER_TOO_SHORT)
1389		return(ENOSPC);
1390
1391	if (rval == NDIS_STATUS_INVALID_OID)
1392		return(EINVAL);
1393
1394	if (rval == NDIS_STATUS_NOT_SUPPORTED ||
1395	    rval == NDIS_STATUS_NOT_ACCEPTED)
1396		return(ENOTSUP);
1397
1398	if (rval != NDIS_STATUS_SUCCESS)
1399		return(ENODEV);
1400
1401	return(0);
1402}
1403
1404uint32_t
1405NdisAddDevice(drv, pdo)
1406	driver_object		*drv;
1407	device_object		*pdo;
1408{
1409	device_object		*fdo;
1410	ndis_miniport_block	*block;
1411	struct ndis_softc	*sc;
1412	uint32_t		status;
1413
1414	status = IoCreateDevice(drv, sizeof(ndis_miniport_block), NULL,
1415	    FILE_DEVICE_UNKNOWN, 0, FALSE, &fdo);
1416
1417	if (status != STATUS_SUCCESS)
1418		return(status);
1419
1420	block = fdo->do_devext;
1421
1422	block->nmb_filterdbs.nf_ethdb = block;
1423	block->nmb_deviceobj = fdo;
1424	block->nmb_physdeviceobj = pdo;
1425	block->nmb_nextdeviceobj = IoAttachDeviceToDeviceStack(fdo, pdo);
1426	KeInitializeSpinLock(&block->nmb_lock);
1427
1428	/*
1429	 * Stash pointers to the miniport block and miniport
1430	 * characteristics info in the if_ndis softc so the
1431	 * UNIX wrapper driver can get to them later.
1432         */
1433	sc = device_get_softc(pdo->do_devext);
1434	sc->ndis_block = block;
1435	sc->ndis_chars = IoGetDriverObjectExtension(drv, (void *)1);
1436
1437	/*
1438	 * If the driver has a MiniportTransferData() function,
1439	 * we should allocate a private RX packet pool.
1440	 */
1441
1442	if (sc->ndis_chars->nmc_transferdata_func != NULL) {
1443		NdisAllocatePacketPool(&status, &block->nmb_rxpool,
1444		    32, PROTOCOL_RESERVED_SIZE_IN_PACKET);
1445		if (status != NDIS_STATUS_SUCCESS) {
1446			IoDetachDevice(block->nmb_nextdeviceobj);
1447			IoDeleteDevice(fdo);
1448			return(status);
1449		}
1450		INIT_LIST_HEAD((&block->nmb_packetlist));
1451	}
1452
1453	/* Give interrupt handling priority over timers. */
1454	IoInitializeDpcRequest(fdo, kernndis_functbl[6].ipt_wrap);
1455	KeSetImportanceDpc(&fdo->do_dpc, KDPC_IMPORTANCE_HIGH);
1456
1457	/* Finish up BSD-specific setup. */
1458
1459	block->nmb_signature = (void *)0xcafebabe;
1460	block->nmb_status_func = kernndis_functbl[0].ipt_wrap;
1461	block->nmb_statusdone_func = kernndis_functbl[1].ipt_wrap;
1462	block->nmb_setdone_func = kernndis_functbl[2].ipt_wrap;
1463	block->nmb_querydone_func = kernndis_functbl[3].ipt_wrap;
1464	block->nmb_resetdone_func = kernndis_functbl[4].ipt_wrap;
1465	block->nmb_sendrsrc_func = kernndis_functbl[5].ipt_wrap;
1466	block->nmb_pendingreq = NULL;
1467
1468	TAILQ_INSERT_TAIL(&ndis_devhead, block, link);
1469
1470	return (STATUS_SUCCESS);
1471}
1472
1473int
1474ndis_unload_driver(arg)
1475	void			*arg;
1476{
1477	struct ndis_softc	*sc;
1478	device_object		*fdo;
1479
1480	sc = arg;
1481
1482	if (sc->ndis_block->nmb_rlist != NULL)
1483		free(sc->ndis_block->nmb_rlist, M_DEVBUF);
1484
1485	ndis_flush_sysctls(sc);
1486
1487	TAILQ_REMOVE(&ndis_devhead, sc->ndis_block, link);
1488
1489	if (sc->ndis_chars->nmc_transferdata_func != NULL)
1490		NdisFreePacketPool(sc->ndis_block->nmb_rxpool);
1491	fdo = sc->ndis_block->nmb_deviceobj;
1492	IoDetachDevice(sc->ndis_block->nmb_nextdeviceobj);
1493	IoDeleteDevice(fdo);
1494
1495	return(0);
1496}
1497