x86_64/nexus: Per-cpu IRQ rman
[dragonfly.git] / sys / platform / pc64 / x86_64 / nexus.c
CommitLineData
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1/*
2 * Copyright 1998 Massachusetts Institute of Technology
3 * Copyright (c) 2008 The DragonFly Project.
4 *
5 * Permission to use, copy, modify, and distribute this software and
6 * its documentation for any purpose and without fee is hereby
7 * granted, provided that both the above copyright notice and this
8 * permission notice appear in all copies, that both the above
9 * copyright notice and this permission notice appear in all
10 * supporting documentation, and that the name of M.I.T. not be used
11 * in advertising or publicity pertaining to distribution of the
12 * software without specific, written prior permission. M.I.T. makes
13 * no representations about the suitability of this software for any
14 * purpose. It is provided "as is" without express or implied
15 * warranty.
16 *
17 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
18 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
21 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
27 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $
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31 */
32
33/*
34 * This code implements a `root nexus' for Intel Architecture
35 * machines. The function of the root nexus is to serve as an
36 * attachment point for both processors and buses, and to manage
37 * resources which are common to all of them. In particular,
38 * this code implements the core resource managers for interrupt
39 * requests, DMA requests (which rightfully should be a part of the
40 * ISA code but it's easier to do it here for now), I/O port addresses,
41 * and I/O memory address space.
42 */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/bus.h>
47#include <sys/kernel.h>
48#include <sys/malloc.h>
49#include <sys/module.h>
50#include <sys/rman.h>
1b505979 51#include <sys/interrupt.h>
bef055ab 52#include <sys/machintr.h>
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53
54#include <machine/vmparam.h>
55#include <vm/vm.h>
56#include <vm/pmap.h>
57#include <machine/pmap.h>
58
59#include <machine/nexusvar.h>
60#include <machine/smp.h>
451af8d9 61#include <machine/intr_machdep.h>
ed4d621d 62#include <machine_base/apic/ioapic.h>
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63
64#define I386_BUS_SPACE_IO 0 /* space is i/o space */
65#define I386_BUS_SPACE_MEM 1 /* space is mem space */
66
67static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
68struct nexus_device {
69 struct resource_list nx_resources;
70 int nx_pcibus;
71};
72
73#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
74
7e370202 75static struct rman irq_rman[MAXCPU], drq_rman, port_rman, mem_rman;
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76
77static int nexus_probe(device_t);
78static int nexus_attach(device_t);
79static int nexus_print_all_resources(device_t dev);
80static int nexus_print_child(device_t, device_t);
81static device_t nexus_add_child(device_t bus, device_t parent, int order,
82 const char *name, int unit);
83static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
4f7fe8c7 84 u_long, u_long, u_long, u_int, int);
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85static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
86static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
87static int nexus_activate_resource(device_t, device_t, int, int,
88 struct resource *);
89static int nexus_deactivate_resource(device_t, device_t, int, int,
90 struct resource *);
91static int nexus_release_resource(device_t, device_t, int, int,
92 struct resource *);
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93static int nexus_config_intr(device_t, device_t, int, enum intr_trigger,
94 enum intr_polarity);
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95static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
96 void (*)(void *), void *,
97 void **, lwkt_serialize_t);
98static int nexus_teardown_intr(device_t, device_t, struct resource *,
99 void *);
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100static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long,
101 int);
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102static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
103static void nexus_delete_resource(device_t, device_t, int, int);
104
105/*
106 * The device_identify method will cause nexus to automatically associate
107 * and attach to the root bus.
108 */
109static device_method_t nexus_methods[] = {
110 /* Device interface */
111 DEVMETHOD(device_identify, bus_generic_identify),
112 DEVMETHOD(device_probe, nexus_probe),
113 DEVMETHOD(device_attach, nexus_attach),
114 DEVMETHOD(device_detach, bus_generic_detach),
115 DEVMETHOD(device_shutdown, bus_generic_shutdown),
116 DEVMETHOD(device_suspend, bus_generic_suspend),
117 DEVMETHOD(device_resume, bus_generic_resume),
118
119 /* Bus interface */
120 DEVMETHOD(bus_print_child, nexus_print_child),
121 DEVMETHOD(bus_add_child, nexus_add_child),
122 DEVMETHOD(bus_read_ivar, nexus_read_ivar),
123 DEVMETHOD(bus_write_ivar, nexus_write_ivar),
124 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
125 DEVMETHOD(bus_release_resource, nexus_release_resource),
126 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
127 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
bef055ab 128 DEVMETHOD(bus_config_intr, nexus_config_intr),
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129 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
130 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
131 DEVMETHOD(bus_set_resource, nexus_set_resource),
132 DEVMETHOD(bus_get_resource, nexus_get_resource),
133 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
134
135 { 0, 0 }
136};
137
138static driver_t nexus_driver = {
139 "nexus",
140 nexus_methods,
141 1, /* no softc */
142};
143static devclass_t nexus_devclass;
144
aa2b9d05 145DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, NULL, NULL);
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146
147static int
148nexus_probe(device_t dev)
149{
7e370202 150 int cpuid;
c8fe38ae 151
7e370202 152 device_quiet(dev); /* suppress attach message for neatness */
9a4bd8f3 153
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154 for (cpuid = 0; cpuid < ncpus; ++cpuid) {
155 struct rman *rm = &irq_rman[cpuid];
156
157 /*
158 * IRQ's are on the mainboard on old systems, but on
159 * the ISA part of PCI->ISA bridges. There would be
160 * multiple sets of IRQs on multi-ISA-bus systems.
161 * PCI interrupts are routed to the ISA component,
162 * so in a way, PCI can be a partial child of an ISA
163 * bus(!). APIC interrupts are global though. In the
164 * non-APIC case, disallow the use of IRQ 2.
165 */
166 rm->rm_start = 0;
167 rm->rm_type = RMAN_ARRAY;
168 rm->rm_descr = "Interrupt request lines";
169
170 /*
171 * XXX should use MachIntrABI.rman_setup
172 */
173 if (ioapic_enable) {
174 rm->rm_end = IDT_HWI_VECTORS - 1;
175 if (rman_init(rm, cpuid) ||
176 rman_manage_region(rm,
177 rm->rm_start, rm->rm_end))
178 panic("nexus_probe irq_rman");
179 } else {
180 rm->rm_end = 15;
181 if (rman_init(rm, cpuid) ||
182 rman_manage_region(rm, rm->rm_start, 1) ||
183 rman_manage_region(rm, 3, rm->rm_end))
184 panic("nexus_probe irq_rman");
185 }
9a4bd8f3 186 }
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187
188 /*
189 * ISA DMA on PCI systems is implemented in the ISA part of each
190 * PCI->ISA bridge and the channels can be duplicated if there are
191 * multiple bridges. (eg: laptops with docking stations)
192 */
193 drq_rman.rm_start = 0;
194 drq_rman.rm_end = 7;
195 drq_rman.rm_type = RMAN_ARRAY;
196 drq_rman.rm_descr = "DMA request lines";
197 /* XXX drq 0 not available on some machines */
65cd6ac8 198 if (rman_init(&drq_rman, -1)
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199 || rman_manage_region(&drq_rman,
200 drq_rman.rm_start, drq_rman.rm_end))
201 panic("nexus_probe drq_rman");
202
203 /*
204 * However, IO ports and Memory truely are global at this level,
205 * as are APIC interrupts (however many IO APICS there turn out
206 * to be on large systems..)
207 */
208 port_rman.rm_start = 0;
209 port_rman.rm_end = 0xffff;
210 port_rman.rm_type = RMAN_ARRAY;
211 port_rman.rm_descr = "I/O ports";
65cd6ac8 212 if (rman_init(&port_rman, -1)
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213 || rman_manage_region(&port_rman, 0, 0xffff))
214 panic("nexus_probe port_rman");
215
216 mem_rman.rm_start = 0;
217 mem_rman.rm_end = ~0u;
218 mem_rman.rm_type = RMAN_ARRAY;
219 mem_rman.rm_descr = "I/O memory addresses";
65cd6ac8 220 if (rman_init(&mem_rman, -1)
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221 || rman_manage_region(&mem_rman, 0, ~0))
222 panic("nexus_probe mem_rman");
223
224 return bus_generic_probe(dev);
225}
226
227static int
228nexus_attach(device_t dev)
229{
230 device_t child;
231
232 /*
233 * First, let our child driver's identify any child devices that
234 * they can find. Once that is done attach any devices that we
235 * found.
236 */
237#if 0 /* FUTURE */
238 bus_generic_probe(dev);
239#endif
240 bus_generic_attach(dev);
241
242 /*
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243 * And if we didn't see ISA on a pci bridge, create a
244 * connection point now so it shows up "on motherboard".
c8fe38ae 245 */
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246 if (!devclass_get_device(devclass_find("isa"), 0)) {
247 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
248 if (child == NULL)
249 panic("nexus_attach isa");
250 device_probe_and_attach(child);
251 }
252
253 return 0;
254}
255
256static int
257nexus_print_all_resources(device_t dev)
258{
259 struct nexus_device *ndev = DEVTONX(dev);
260 struct resource_list *rl = &ndev->nx_resources;
261 int retval = 0;
262
263 if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1)
264 retval += kprintf(" at");
265
266 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
267 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
268 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
269
270 return retval;
271}
272
273static int
274nexus_print_child(device_t bus, device_t child)
275{
276 struct nexus_device *ndev = DEVTONX(child);
277 int retval = 0;
278
279 retval += bus_print_child_header(bus, child);
280 retval += nexus_print_all_resources(child);
281 if (ndev->nx_pcibus != -1)
282 retval += kprintf(" pcibus %d", ndev->nx_pcibus);
283 retval += kprintf(" on motherboard\n");
284
285 return (retval);
286}
287
288static device_t
289nexus_add_child(device_t bus, device_t parent, int order,
290 const char *name, int unit)
291{
292 device_t child;
293 struct nexus_device *ndev;
294
295 ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO);
296 if (!ndev)
297 return(0);
298 resource_list_init(&ndev->nx_resources);
299 ndev->nx_pcibus = -1;
300
301 child = device_add_child_ordered(parent, order, name, unit);
302
303 /* should we free this in nexus_child_detached? */
304 device_set_ivars(child, ndev);
305
306 return(child);
307}
308
309static int
310nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
311{
312 struct nexus_device *ndev = DEVTONX(child);
313
314 switch (which) {
315 case NEXUS_IVAR_PCIBUS:
316 *result = ndev->nx_pcibus;
317 break;
318 default:
319 return ENOENT;
320 }
321 return 0;
322}
323
324static int
325nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
326{
327 struct nexus_device *ndev = DEVTONX(child);
328
329 switch (which) {
330 case NEXUS_IVAR_PCIBUS:
331 ndev->nx_pcibus = value;
332 break;
333 default:
334 return ENOENT;
335 }
336 return 0;
337}
338
339/*
340 * Allocate a resource on behalf of child. NB: child is usually going to be a
341 * child of one of our descendants, not a direct child of nexus0.
342 * (Exceptions include npx.)
343 */
344static struct resource *
345nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
4f7fe8c7 346 u_long start, u_long end, u_long count, u_int flags, int cpuid)
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347{
348 struct nexus_device *ndev = DEVTONX(child);
349 struct resource *rv;
350 struct resource_list_entry *rle;
351 struct rman *rm;
352 int needactivate = flags & RF_ACTIVE;
353
354 /*
355 * If this is an allocation of the "default" range for a given RID, and
356 * we know what the resources for this device are (ie. they aren't maintained
357 * by a child bus), then work out the start/end values.
358 */
359 if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
360 if (ndev == NULL)
361 return(NULL);
362 rle = resource_list_find(&ndev->nx_resources, type, *rid);
363 if (rle == NULL)
364 return(NULL);
365 start = rle->start;
366 end = rle->end;
367 count = rle->count;
4f7fe8c7 368 cpuid = rle->cpuid;
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369 }
370
371 flags &= ~RF_ACTIVE;
372
373 switch (type) {
374 case SYS_RES_IRQ:
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375 if (cpuid < 0 || cpuid >= ncpus) {
376 kprintf("NEXUS cpuid %d:\n", cpuid);
377 print_backtrace(-1);
378 cpuid = 0; /* XXX */
379 }
7e370202 380 rm = &irq_rman[cpuid];
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381 break;
382
383 case SYS_RES_DRQ:
384 rm = &drq_rman;
385 break;
386
387 case SYS_RES_IOPORT:
388 rm = &port_rman;
389 break;
390
391 case SYS_RES_MEMORY:
392 rm = &mem_rman;
393 break;
394
395 default:
396 return 0;
397 }
398
399 rv = rman_reserve_resource(rm, start, end, count, flags, child);
400 if (rv == 0)
401 return 0;
402
403 if (type == SYS_RES_MEMORY) {
404 rman_set_bustag(rv, I386_BUS_SPACE_MEM);
405 } else if (type == SYS_RES_IOPORT) {
406 rman_set_bustag(rv, I386_BUS_SPACE_IO);
407 rman_set_bushandle(rv, rv->r_start);
408 }
409
410 if (needactivate) {
411 if (bus_activate_resource(child, type, *rid, rv)) {
412 rman_release_resource(rv);
413 return 0;
414 }
415 }
416
417 return rv;
418}
419
420static int
421nexus_activate_resource(device_t bus, device_t child, int type, int rid,
422 struct resource *r)
423{
424 /*
425 * If this is a memory resource, map it into the kernel.
426 */
427 if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) {
428 caddr_t vaddr = 0;
429
430 if (rman_get_end(r) < 1024 * 1024) {
431 /*
432 * The first 1Mb is mapped at KERNBASE.
433 */
434 vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r));
435 } else {
436 u_int64_t paddr;
437 u_int64_t psize;
438 u_int32_t poffs;
439
440 paddr = rman_get_start(r);
441 psize = rman_get_size(r);
442
443 poffs = paddr - trunc_page(paddr);
444 vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
445 }
446 rman_set_virtual(r, vaddr);
447 /* IBM-PC: the type of bus_space_handle_t is u_int */
448 rman_set_bushandle(r, (bus_space_handle_t) vaddr);
449 }
450 return (rman_activate_resource(r));
451}
452
453static int
454nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
455 struct resource *r)
456{
457 /*
458 * If this is a memory resource, unmap it.
459 */
460 if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) &&
461 (rman_get_end(r) >= 1024 * 1024)) {
462 u_int32_t psize;
463
464 psize = rman_get_size(r);
465 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
466 }
467
468 return (rman_deactivate_resource(r));
469}
470
471static int
472nexus_release_resource(device_t bus, device_t child, int type, int rid,
473 struct resource *r)
474{
475 if (rman_get_flags(r) & RF_ACTIVE) {
476 int error = bus_deactivate_resource(child, type, rid, r);
477 if (error)
478 return error;
479 }
480 return (rman_release_resource(r));
481}
482
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483static int
484nexus_config_intr(device_t bus, device_t chile, int irq,
485 enum intr_trigger trig, enum intr_polarity pola)
486{
487 machintr_intr_config(irq, trig, pola);
488 return 0;
489}
490
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491/*
492 * Currently this uses the really grody interface from kern/kern_intr.c
493 * (which really doesn't belong in kern/anything.c). Eventually, all of
494 * the code in kern_intr.c and machdep_intr.c should get moved here, since
495 * this is going to be the official interface.
496 */
497static int
498nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
499 int flags, void (*ihand)(void *), void *arg,
500 void **cookiep, lwkt_serialize_t serializer)
501{
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502 int error, icflags;
503
504 /* somebody tried to setup an irq that failed to allocate! */
505 if (irq == NULL)
506 panic("nexus_setup_intr: NULL irq resource!");
507
508 *cookiep = 0;
509 icflags = flags;
510 if ((irq->r_flags & RF_SHAREABLE) == 0)
511 icflags |= INTR_EXCL;
512
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513 /*
514 * We depend here on rman_activate_resource() being idempotent.
515 */
516 error = rman_activate_resource(irq);
517 if (error)
518 return (error);
519
520 /*
521 * XXX cast the interrupt handler function to an inthand2_t. The
522 * difference is that an additional frame argument is passed which
523 * we do not currently want to expose the BUS subsystem to.
524 */
525 *cookiep = register_int(irq->r_start, (inthand2_t *)ihand, arg,
526 device_get_nameunit(child), serializer,
6355d931 527 icflags, rman_get_cpuid(irq));
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528 if (*cookiep == NULL)
529 error = EINVAL;
530 return (error);
531}
532
533static int
534nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
535{
536 if (ih) {
6355d931 537 unregister_int(ih, rman_get_cpuid(r));
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538 return (0);
539 }
540 return(-1);
541}
542
543static int
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544nexus_set_resource(device_t dev, device_t child, int type, int rid,
545 u_long start, u_long count, int cpuid)
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546{
547 struct nexus_device *ndev = DEVTONX(child);
548 struct resource_list *rl = &ndev->nx_resources;
549
550 /* XXX this should return a success/failure indicator */
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551 resource_list_add(rl, type, rid, start, start + count - 1, count,
552 cpuid);
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553 return(0);
554}
555
556static int
557nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
558{
559 struct nexus_device *ndev = DEVTONX(child);
560 struct resource_list *rl = &ndev->nx_resources;
561 struct resource_list_entry *rle;
562
563 rle = resource_list_find(rl, type, rid);
564 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
565 type, rid, startp, countp, rle);
566 if (!rle)
567 return(ENOENT);
568 if (startp)
569 *startp = rle->start;
570 if (countp)
571 *countp = rle->count;
572 return(0);
573}
574
575static void
576nexus_delete_resource(device_t dev, device_t child, int type, int rid)
577{
578 struct nexus_device *ndev = DEVTONX(child);
579 struct resource_list *rl = &ndev->nx_resources;
580
581 resource_list_delete(rl, type, rid);
582}
583