nexus/intr: Change the wrong cpuid backtrace to assertion
[dragonfly.git] / sys / platform / pc32 / i386 / nexus.c
CommitLineData
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1/*
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $
30 */
31
32/*
33 * This code implements a `root nexus' for Intel Architecture
34 * machines. The function of the root nexus is to serve as an
35 * attachment point for both processors and buses, and to manage
36 * resources which are common to all of them. In particular,
37 * this code implements the core resource managers for interrupt
38 * requests, DMA requests (which rightfully should be a part of the
39 * ISA code but it's easier to do it here for now), I/O port addresses,
40 * and I/O memory address space.
41 */
42
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43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/bus.h>
46#include <sys/kernel.h>
47#include <sys/malloc.h>
48#include <sys/module.h>
984263bc 49#include <sys/rman.h>
1b505979 50#include <sys/interrupt.h>
bef055ab 51#include <sys/machintr.h>
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52
53#include <machine/vmparam.h>
54#include <vm/vm.h>
55#include <vm/pmap.h>
56#include <machine/pmap.h>
57
2899c8b1 58#include <machine/nexusvar.h>
984263bc 59#include <machine/smp.h>
b2150df1 60#include <machine/intr_machdep.h>
ed4d621d 61#include <machine_base/apic/ioapic.h>
984263bc 62
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63#include <bus/pci/pcivar.h>
64#include <bus/pci/pcireg.h>
65#include <bus/pci/pcibus.h>
66#include <bus/pci/pci_cfgreg.h>
67#include <bus/pci/pcib_private.h>
68
69#include "pcib_if.h"
70
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71static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
72struct nexus_device {
73 struct resource_list nx_resources;
2899c8b1 74 int nx_pcibus;
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75};
76
77#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
78
cc506d27 79static struct rman irq_rman[MAXCPU], drq_rman, port_rman, mem_rman;
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80
81static int nexus_probe(device_t);
82static int nexus_attach(device_t);
83static int nexus_print_all_resources(device_t dev);
84static int nexus_print_child(device_t, device_t);
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85static device_t nexus_add_child(device_t bus, device_t parent, int order,
86 const char *name, int unit);
984263bc 87static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
4f7fe8c7 88 u_long, u_long, u_long, u_int, int);
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89static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
90static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
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91static int nexus_activate_resource(device_t, device_t, int, int,
92 struct resource *);
93static int nexus_deactivate_resource(device_t, device_t, int, int,
94 struct resource *);
95static int nexus_release_resource(device_t, device_t, int, int,
96 struct resource *);
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97static int nexus_config_intr(device_t, device_t, int, enum intr_trigger,
98 enum intr_polarity);
984263bc 99static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
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100 void (*)(void *), void *,
101 void **, lwkt_serialize_t);
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102static int nexus_teardown_intr(device_t, device_t, struct resource *,
103 void *);
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104static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long,
105 int);
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106static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
107static void nexus_delete_resource(device_t, device_t, int, int);
108
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109/*
110 * The device_identify method will cause nexus to automatically associate
111 * and attach to the root bus.
112 */
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113static device_method_t nexus_methods[] = {
114 /* Device interface */
39b5d600 115 DEVMETHOD(device_identify, bus_generic_identify),
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116 DEVMETHOD(device_probe, nexus_probe),
117 DEVMETHOD(device_attach, nexus_attach),
118 DEVMETHOD(device_detach, bus_generic_detach),
119 DEVMETHOD(device_shutdown, bus_generic_shutdown),
120 DEVMETHOD(device_suspend, bus_generic_suspend),
121 DEVMETHOD(device_resume, bus_generic_resume),
122
123 /* Bus interface */
124 DEVMETHOD(bus_print_child, nexus_print_child),
125 DEVMETHOD(bus_add_child, nexus_add_child),
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126 DEVMETHOD(bus_read_ivar, nexus_read_ivar),
127 DEVMETHOD(bus_write_ivar, nexus_write_ivar),
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128 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
129 DEVMETHOD(bus_release_resource, nexus_release_resource),
130 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
131 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
bef055ab 132 DEVMETHOD(bus_config_intr, nexus_config_intr),
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133 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
134 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
135 DEVMETHOD(bus_set_resource, nexus_set_resource),
136 DEVMETHOD(bus_get_resource, nexus_get_resource),
137 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
138
139 { 0, 0 }
140};
141
142static driver_t nexus_driver = {
143 "nexus",
144 nexus_methods,
145 1, /* no softc */
146};
147static devclass_t nexus_devclass;
148
aa2b9d05 149DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, NULL, NULL);
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150
151static int
152nexus_probe(device_t dev)
153{
cc506d27 154 int cpuid;
984263bc 155
cc506d27 156 device_quiet(dev); /* suppress attach message for neatness */
30c5f287 157
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158 for (cpuid = 0; cpuid < ncpus; ++cpuid) {
159 struct rman *rm = &irq_rman[cpuid];
160
cc506d27 161 rm->rm_start = 0;
14bd3265 162 rm->rm_end = IDT_HWI_VECTORS - 1;
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163 rm->rm_type = RMAN_ARRAY;
164 rm->rm_descr = "Interrupt request lines";
165
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166 if (rman_init(rm, cpuid))
167 panic("nexus_probe rman_init");
168 MachIntrABI.rman_setup(rm);
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169 }
170
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171 /*
172 * ISA DMA on PCI systems is implemented in the ISA part of each
173 * PCI->ISA bridge and the channels can be duplicated if there are
174 * multiple bridges. (eg: laptops with docking stations)
175 */
176 drq_rman.rm_start = 0;
984263bc 177 drq_rman.rm_end = 7;
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178 drq_rman.rm_type = RMAN_ARRAY;
179 drq_rman.rm_descr = "DMA request lines";
180 /* XXX drq 0 not available on some machines */
65cd6ac8 181 if (rman_init(&drq_rman, -1)
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182 || rman_manage_region(&drq_rman,
183 drq_rman.rm_start, drq_rman.rm_end))
184 panic("nexus_probe drq_rman");
185
186 /*
187 * However, IO ports and Memory truely are global at this level,
188 * as are APIC interrupts (however many IO APICS there turn out
189 * to be on large systems..)
190 */
191 port_rman.rm_start = 0;
192 port_rman.rm_end = 0xffff;
193 port_rman.rm_type = RMAN_ARRAY;
194 port_rman.rm_descr = "I/O ports";
65cd6ac8 195 if (rman_init(&port_rman, -1)
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196 || rman_manage_region(&port_rman, 0, 0xffff))
197 panic("nexus_probe port_rman");
198
199 mem_rman.rm_start = 0;
200 mem_rman.rm_end = ~0u;
201 mem_rman.rm_type = RMAN_ARRAY;
202 mem_rman.rm_descr = "I/O memory addresses";
65cd6ac8 203 if (rman_init(&mem_rman, -1)
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204 || rman_manage_region(&mem_rman, 0, ~0))
205 panic("nexus_probe mem_rman");
206
207 return bus_generic_probe(dev);
208}
209
210static int
211nexus_attach(device_t dev)
212{
213 device_t child;
214
215 /*
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216 * First, let our child driver's identify any child devices that
217 * they can find. Once that is done attach any devices that we
218 * found.
984263bc 219 */
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220#if 0 /* FUTURE */
221 bus_generic_probe(dev);
222#endif
984263bc 223 bus_generic_attach(dev);
41a01a4d 224
984263bc 225 /*
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226 * And if we didn't see ISA on a pci bridge, create a
227 * connection point now so it shows up "on motherboard".
984263bc 228 */
984263bc 229 if (!devclass_get_device(devclass_find("isa"), 0)) {
2581072f 230 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
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231 if (child == NULL)
232 panic("nexus_attach isa");
233 device_probe_and_attach(child);
234 }
235
236 return 0;
237}
238
239static int
240nexus_print_all_resources(device_t dev)
241{
242 struct nexus_device *ndev = DEVTONX(dev);
243 struct resource_list *rl = &ndev->nx_resources;
244 int retval = 0;
245
2899c8b1 246 if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1)
26be20a0 247 retval += kprintf(" at");
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248
249 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
250 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
251 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
252
253 return retval;
254}
255
256static int
257nexus_print_child(device_t bus, device_t child)
258{
2899c8b1 259 struct nexus_device *ndev = DEVTONX(child);
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260 int retval = 0;
261
262 retval += bus_print_child_header(bus, child);
263 retval += nexus_print_all_resources(child);
2899c8b1 264 if (ndev->nx_pcibus != -1)
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265 retval += kprintf(" pcibus %d", ndev->nx_pcibus);
266 retval += kprintf(" on motherboard\n");
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267
268 return (retval);
269}
270
271static device_t
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272nexus_add_child(device_t bus, device_t parent, int order,
273 const char *name, int unit)
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274{
275 device_t child;
276 struct nexus_device *ndev;
277
efda3bd0 278 ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO);
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279 if (!ndev)
280 return(0);
281 resource_list_init(&ndev->nx_resources);
2899c8b1 282 ndev->nx_pcibus = -1;
984263bc 283
2581072f 284 child = device_add_child_ordered(parent, order, name, unit);
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285
286 /* should we free this in nexus_child_detached? */
287 device_set_ivars(child, ndev);
288
289 return(child);
290}
291
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292static int
293nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
294{
295 struct nexus_device *ndev = DEVTONX(child);
296
297 switch (which) {
298 case NEXUS_IVAR_PCIBUS:
299 *result = ndev->nx_pcibus;
300 break;
301 default:
302 return ENOENT;
303 }
304 return 0;
305}
306
307static int
308nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
309{
310 struct nexus_device *ndev = DEVTONX(child);
311
312 switch (which) {
313 case NEXUS_IVAR_PCIBUS:
314 ndev->nx_pcibus = value;
315 break;
316 default:
317 return ENOENT;
318 }
319 return 0;
320}
321
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322/*
323 * Allocate a resource on behalf of child. NB: child is usually going to be a
324 * child of one of our descendants, not a direct child of nexus0.
325 * (Exceptions include npx.)
326 */
327static struct resource *
328nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
4f7fe8c7 329 u_long start, u_long end, u_long count, u_int flags, int cpuid)
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330{
331 struct nexus_device *ndev = DEVTONX(child);
332 struct resource *rv;
333 struct resource_list_entry *rle;
334 struct rman *rm;
335 int needactivate = flags & RF_ACTIVE;
336
337 /*
338 * If this is an allocation of the "default" range for a given RID, and
339 * we know what the resources for this device are (ie. they aren't maintained
340 * by a child bus), then work out the start/end values.
341 */
342 if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
343 if (ndev == NULL)
344 return(NULL);
345 rle = resource_list_find(&ndev->nx_resources, type, *rid);
346 if (rle == NULL)
347 return(NULL);
348 start = rle->start;
349 end = rle->end;
350 count = rle->count;
4f7fe8c7 351 cpuid = rle->cpuid;
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352 }
353
354 flags &= ~RF_ACTIVE;
355
356 switch (type) {
357 case SYS_RES_IRQ:
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358 KASSERT(cpuid >= 0 || cpuid < ncpus,
359 ("nexus invalid cpuid %d:\n", cpuid));
cc506d27 360 rm = &irq_rman[cpuid];
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361 break;
362
363 case SYS_RES_DRQ:
364 rm = &drq_rman;
365 break;
366
367 case SYS_RES_IOPORT:
368 rm = &port_rman;
369 break;
370
371 case SYS_RES_MEMORY:
372 rm = &mem_rman;
373 break;
374
375 default:
376 return 0;
377 }
378
379 rv = rman_reserve_resource(rm, start, end, count, flags, child);
380 if (rv == 0)
381 return 0;
382
383 if (type == SYS_RES_MEMORY) {
384 rman_set_bustag(rv, I386_BUS_SPACE_MEM);
385 } else if (type == SYS_RES_IOPORT) {
386 rman_set_bustag(rv, I386_BUS_SPACE_IO);
984263bc 387 rman_set_bushandle(rv, rv->r_start);
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388 }
389
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390 if (needactivate) {
391 if (bus_activate_resource(child, type, *rid, rv)) {
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392 rman_release_resource(rv);
393 return 0;
394 }
395 }
396
397 return rv;
398}
399
400static int
401nexus_activate_resource(device_t bus, device_t child, int type, int rid,
402 struct resource *r)
403{
404 /*
405 * If this is a memory resource, map it into the kernel.
406 */
407 if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) {
408 caddr_t vaddr = 0;
409
778931ae 410 if (rman_get_end(r) < 1024 * 1024) {
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411 /*
412 * The first 1Mb is mapped at KERNBASE.
413 */
778931ae 414 vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r));
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415 } else {
416 u_int32_t paddr;
417 u_int32_t psize;
418 u_int32_t poffs;
419
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420 paddr = rman_get_start(r);
421 psize = rman_get_size(r);
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422
423 poffs = paddr - trunc_page(paddr);
424 vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
425 }
426 rman_set_virtual(r, vaddr);
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427 /* IBM-PC: the type of bus_space_handle_t is u_int */
428 rman_set_bushandle(r, (bus_space_handle_t) vaddr);
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429 }
430 return (rman_activate_resource(r));
431}
432
433static int
434nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
435 struct resource *r)
436{
437 /*
438 * If this is a memory resource, unmap it.
439 */
778931ae
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440 if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) &&
441 (rman_get_end(r) >= 1024 * 1024)) {
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442 u_int32_t psize;
443
778931ae 444 psize = rman_get_size(r);
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445 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
446 }
447
448 return (rman_deactivate_resource(r));
449}
450
451static int
452nexus_release_resource(device_t bus, device_t child, int type, int rid,
453 struct resource *r)
454{
778931ae 455 if (rman_get_flags(r) & RF_ACTIVE) {
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456 int error = bus_deactivate_resource(child, type, rid, r);
457 if (error)
458 return error;
459 }
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460 return (rman_release_resource(r));
461}
462
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463static int
464nexus_config_intr(device_t bus, device_t chile, int irq,
465 enum intr_trigger trig, enum intr_polarity pola)
466{
467 machintr_intr_config(irq, trig, pola);
468 return 0;
469}
470
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471/*
472 * Currently this uses the really grody interface from kern/kern_intr.c
473 * (which really doesn't belong in kern/anything.c). Eventually, all of
474 * the code in kern_intr.c and machdep_intr.c should get moved here, since
475 * this is going to be the official interface.
476 */
477static int
478nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
e9cb6d99
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479 int flags, void (*ihand)(void *), void *arg,
480 void **cookiep, lwkt_serialize_t serializer)
984263bc 481{
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482 int error, icflags;
483
484 /* somebody tried to setup an irq that failed to allocate! */
485 if (irq == NULL)
486 panic("nexus_setup_intr: NULL irq resource!");
487
488 *cookiep = 0;
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489 icflags = flags;
490 if ((irq->r_flags & RF_SHAREABLE) == 0)
491 icflags |= INTR_EXCL;
984263bc 492
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493 /*
494 * We depend here on rman_activate_resource() being idempotent.
495 */
496 error = rman_activate_resource(irq);
497 if (error)
498 return (error);
499
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500 /*
501 * XXX cast the interrupt handler function to an inthand2_t. The
502 * difference is that an additional frame argument is passed which
503 * we do not currently want to expose the BUS subsystem to.
504 */
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505 *cookiep = register_int(irq->r_start, (inthand2_t *)ihand, arg,
506 device_get_nameunit(child), serializer,
6355d931 507 icflags, rman_get_cpuid(irq));
984263bc 508 if (*cookiep == NULL)
9d522d14 509 error = EINVAL;
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510 return (error);
511}
512
513static int
514nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
515{
9d522d14 516 if (ih) {
6355d931 517 unregister_int(ih, rman_get_cpuid(r));
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518 return (0);
519 }
520 return(-1);
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521}
522
523static int
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524nexus_set_resource(device_t dev, device_t child, int type, int rid,
525 u_long start, u_long count, int cpuid)
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526{
527 struct nexus_device *ndev = DEVTONX(child);
528 struct resource_list *rl = &ndev->nx_resources;
529
530 /* XXX this should return a success/failure indicator */
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531 resource_list_add(rl, type, rid, start, start + count - 1, count,
532 cpuid);
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533 return(0);
534}
535
536static int
537nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
538{
539 struct nexus_device *ndev = DEVTONX(child);
540 struct resource_list *rl = &ndev->nx_resources;
541 struct resource_list_entry *rle;
542
543 rle = resource_list_find(rl, type, rid);
544 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
545 type, rid, startp, countp, rle);
546 if (!rle)
547 return(ENOENT);
548 if (startp)
549 *startp = rle->start;
550 if (countp)
551 *countp = rle->count;
552 return(0);
553}
554
555static void
556nexus_delete_resource(device_t dev, device_t child, int type, int rid)
557{
558 struct nexus_device *ndev = DEVTONX(child);
559 struct resource_list *rl = &ndev->nx_resources;
560
561 resource_list_delete(rl, type, rid);
562}
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