1 /*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/9.1/sys/dev/acpica/acpi_pcib_acpi.c 234150 2012-04-11 20:50:17Z jhb $");
30
31 #include "opt_acpi.h"
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/kernel.h>
35 #include <sys/limits.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/rman.h>
39 #include <sys/sysctl.h>
40
41 #include <contrib/dev/acpica/include/acpi.h>
42 #include <contrib/dev/acpica/include/accommon.h>
43
44 #include <dev/acpica/acpivar.h>
45
46 #include <machine/pci_cfgreg.h>
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/pcib_private.h>
49 #include "pcib_if.h"
50
51 #include <dev/acpica/acpi_pcibvar.h>
52
53 /* Hooks for the ACPI CA debugging infrastructure. */
54 #define _COMPONENT ACPI_BUS
55 ACPI_MODULE_NAME("PCI_ACPI")
56
57 struct acpi_hpcib_softc {
58 device_t ap_dev;
59 ACPI_HANDLE ap_handle;
60 int ap_flags;
61
62 int ap_segment; /* PCI domain */
63 int ap_bus; /* bios-assigned bus number */
64 int ap_addr; /* device/func of PCI-Host bridge */
65
66 ACPI_BUFFER ap_prt; /* interrupt routing table */
67 #ifdef NEW_PCIB
68 struct pcib_host_resources ap_host_res;
69 #endif
70 };
71
72 static int acpi_pcib_acpi_probe(device_t bus);
73 static int acpi_pcib_acpi_attach(device_t bus);
74 static int acpi_pcib_read_ivar(device_t dev, device_t child,
75 int which, uintptr_t *result);
76 static int acpi_pcib_write_ivar(device_t dev, device_t child,
77 int which, uintptr_t value);
78 static uint32_t acpi_pcib_read_config(device_t dev, u_int bus,
79 u_int slot, u_int func, u_int reg, int bytes);
80 static void acpi_pcib_write_config(device_t dev, u_int bus,
81 u_int slot, u_int func, u_int reg, uint32_t data,
82 int bytes);
83 static int acpi_pcib_acpi_route_interrupt(device_t pcib,
84 device_t dev, int pin);
85 static int acpi_pcib_alloc_msi(device_t pcib, device_t dev,
86 int count, int maxcount, int *irqs);
87 static int acpi_pcib_map_msi(device_t pcib, device_t dev,
88 int irq, uint64_t *addr, uint32_t *data);
89 static int acpi_pcib_alloc_msix(device_t pcib, device_t dev,
90 int *irq);
91 static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
92 device_t child, int type, int *rid,
93 u_long start, u_long end, u_long count,
94 u_int flags);
95 #ifdef NEW_PCIB
96 static int acpi_pcib_acpi_adjust_resource(device_t dev,
97 device_t child, int type, struct resource *r,
98 u_long start, u_long end);
99 #endif
100
101 static device_method_t acpi_pcib_acpi_methods[] = {
102 /* Device interface */
103 DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
104 DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
105 DEVMETHOD(device_shutdown, bus_generic_shutdown),
106 DEVMETHOD(device_suspend, bus_generic_suspend),
107 DEVMETHOD(device_resume, bus_generic_resume),
108
109 /* Bus interface */
110 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
111 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
112 DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
113 #ifdef NEW_PCIB
114 DEVMETHOD(bus_adjust_resource, acpi_pcib_acpi_adjust_resource),
115 #else
116 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
117 #endif
118 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
119 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
120 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
121 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
122 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
123
124 /* pcib interface */
125 DEVMETHOD(pcib_maxslots, pcib_maxslots),
126 DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
127 DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
128 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
129 DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi),
130 DEVMETHOD(pcib_release_msi, pcib_release_msi),
131 DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix),
132 DEVMETHOD(pcib_release_msix, pcib_release_msix),
133 DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi),
134 DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep),
135
136 DEVMETHOD_END
137 };
138
139 static devclass_t pcib_devclass;
140
141 DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
142 sizeof(struct acpi_hpcib_softc));
143 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
144 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
145
146 static int
147 acpi_pcib_acpi_probe(device_t dev)
148 {
149 ACPI_DEVICE_INFO *devinfo;
150 ACPI_HANDLE h;
151 int root;
152
153 if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
154 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
155 return (ENXIO);
156 root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
157 AcpiOsFree(devinfo);
158 if (!root || pci_cfgregopen() == 0)
159 return (ENXIO);
160
161 device_set_desc(dev, "ACPI Host-PCI bridge");
162 return (0);
163 }
164
165 #ifdef NEW_PCIB
166 static ACPI_STATUS
167 acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context)
168 {
169 struct acpi_hpcib_softc *sc;
170 UINT64 length, min, max;
171 u_int flags;
172 int error, type;
173
174 sc = context;
175 switch (res->Type) {
176 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
177 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
178 panic("host bridge has depenedent resources");
179 case ACPI_RESOURCE_TYPE_ADDRESS16:
180 case ACPI_RESOURCE_TYPE_ADDRESS32:
181 case ACPI_RESOURCE_TYPE_ADDRESS64:
182 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
183 if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER)
184 break;
185 switch (res->Type) {
186 case ACPI_RESOURCE_TYPE_ADDRESS16:
187 min = res->Data.Address16.Minimum;
188 max = res->Data.Address16.Maximum;
189 length = res->Data.Address16.AddressLength;
190 break;
191 case ACPI_RESOURCE_TYPE_ADDRESS32:
192 min = res->Data.Address32.Minimum;
193 max = res->Data.Address32.Maximum;
194 length = res->Data.Address32.AddressLength;
195 break;
196 case ACPI_RESOURCE_TYPE_ADDRESS64:
197 min = res->Data.Address64.Minimum;
198 max = res->Data.Address64.Maximum;
199 length = res->Data.Address64.AddressLength;
200 break;
201 default:
202 KASSERT(res->Type ==
203 ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
204 ("should never happen"));
205 min = res->Data.ExtAddress64.Minimum;
206 max = res->Data.ExtAddress64.Maximum;
207 length = res->Data.ExtAddress64.AddressLength;
208 break;
209 }
210 if (length == 0)
211 break;
212 if (min + length - 1 != max &&
213 (res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED ||
214 res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED))
215 break;
216 flags = 0;
217 switch (res->Data.Address.ResourceType) {
218 case ACPI_MEMORY_RANGE:
219 type = SYS_RES_MEMORY;
220 if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
221 if (res->Data.Address.Info.Mem.Caching ==
222 ACPI_PREFETCHABLE_MEMORY)
223 flags |= RF_PREFETCHABLE;
224 } else {
225 /*
226 * XXX: Parse prefetch flag out of
227 * TypeSpecific.
228 */
229 }
230 break;
231 case ACPI_IO_RANGE:
232 type = SYS_RES_IOPORT;
233 break;
234 #ifdef PCI_RES_BUS
235 case ACPI_BUS_NUMBER_RANGE:
236 type = PCI_RES_BUS;
237 break;
238 #endif
239 default:
240 return (AE_OK);
241 }
242
243 if (min + length - 1 != max)
244 device_printf(sc->ap_dev,
245 "Length mismatch for %d range: %jx vs %jx\n", type,
246 (uintmax_t)max - min + 1, (uintmax_t)length);
247 #ifdef __i386__
248 if (min > ULONG_MAX) {
249 device_printf(sc->ap_dev,
250 "Ignoring %d range above 4GB (%#jx-%#jx)\n",
251 type, (uintmax_t)min, (uintmax_t)max);
252 break;
253 }
254 if (max > ULONG_MAX) {
255 device_printf(sc->ap_dev,
256 "Truncating end of %d range above 4GB (%#jx-%#jx)\n",
257 type, (uintmax_t)min, (uintmax_t)max);
258 max = ULONG_MAX;
259 }
260 #endif
261 error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max,
262 flags);
263 if (error)
264 panic("Failed to manage %d range (%#jx-%#jx): %d",
265 type, (uintmax_t)min, (uintmax_t)max, error);
266 break;
267 default:
268 break;
269 }
270 return (AE_OK);
271 }
272 #endif
273
274 static int
275 acpi_pcib_acpi_attach(device_t dev)
276 {
277 struct acpi_hpcib_softc *sc;
278 ACPI_STATUS status;
279 static int bus0_seen = 0;
280 u_int slot, func, busok;
281 uint8_t busno;
282
283 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
284
285 sc = device_get_softc(dev);
286 sc->ap_dev = dev;
287 sc->ap_handle = acpi_get_handle(dev);
288
289 /*
290 * Get our segment number by evaluating _SEG.
291 * It's OK for this to not exist.
292 */
293 status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
294 if (ACPI_FAILURE(status)) {
295 if (status != AE_NOT_FOUND) {
296 device_printf(dev, "could not evaluate _SEG - %s\n",
297 AcpiFormatException(status));
298 return_VALUE (ENXIO);
299 }
300 /* If it's not found, assume 0. */
301 sc->ap_segment = 0;
302 }
303
304 /*
305 * Get the address (device and function) of the associated
306 * PCI-Host bridge device from _ADR. Assume we don't have one if
307 * it doesn't exist.
308 */
309 status = acpi_GetInteger(sc->ap_handle, "_ADR", &sc->ap_addr);
310 if (ACPI_FAILURE(status)) {
311 device_printf(dev, "could not evaluate _ADR - %s\n",
312 AcpiFormatException(status));
313 sc->ap_addr = -1;
314 }
315
316 #ifdef NEW_PCIB
317 /*
318 * Determine which address ranges this bridge decodes and setup
319 * resource managers for those ranges.
320 */
321 if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0)
322 panic("failed to init hostb resources");
323 if (!acpi_disabled("hostres")) {
324 status = AcpiWalkResources(sc->ap_handle, "_CRS",
325 acpi_pcib_producer_handler, sc);
326 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
327 device_printf(sc->ap_dev, "failed to parse resources: %s\n",
328 AcpiFormatException(status));
329 }
330 #endif
331
332 /*
333 * Get our base bus number by evaluating _BBN.
334 * If this doesn't work, we assume we're bus number 0.
335 *
336 * XXX note that it may also not exist in the case where we are
337 * meant to use a private configuration space mechanism for this bus,
338 * so we should dig out our resources and check to see if we have
339 * anything like that. How do we do this?
340 * XXX If we have the requisite information, and if we don't think the
341 * default PCI configuration space handlers can deal with this bus,
342 * we should attach our own handler.
343 * XXX invoke _REG on this for the PCI config space address space?
344 * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
345 * _BBN correctly. They set _BBN to zero for all bridges. Thus,
346 * if _BBN is zero and PCI bus 0 already exists, we try to read our
347 * bus number from the configuration registers at address _ADR.
348 * We only do this for domain/segment 0 in the hopes that this is
349 * only needed for old single-domain machines.
350 */
351 status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
352 if (ACPI_FAILURE(status)) {
353 if (status != AE_NOT_FOUND) {
354 device_printf(dev, "could not evaluate _BBN - %s\n",
355 AcpiFormatException(status));
356 return_VALUE (ENXIO);
357 } else {
358 /* If it's not found, assume 0. */
359 sc->ap_bus = 0;
360 }
361 }
362
363 /*
364 * If this is segment 0, the bus is zero, and PCI bus 0 already
365 * exists, read the bus number via PCI config space.
366 */
367 busok = 1;
368 if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
369 busok = 0;
370 if (sc->ap_addr != -1) {
371 /* XXX: We assume bus 0. */
372 slot = ACPI_ADR_PCI_SLOT(sc->ap_addr);
373 func = ACPI_ADR_PCI_FUNC(sc->ap_addr);
374 if (bootverbose)
375 device_printf(dev, "reading config registers from 0:%d:%d\n",
376 slot, func);
377 if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
378 device_printf(dev, "couldn't read bus number from cfg space\n");
379 else {
380 sc->ap_bus = busno;
381 busok = 1;
382 }
383 }
384 }
385
386 /*
387 * If nothing else worked, hope that ACPI at least lays out the
388 * host-PCI bridges in order and that as a result our unit number
389 * is actually our bus number. There are several reasons this
390 * might not be true.
391 */
392 if (busok == 0) {
393 sc->ap_bus = device_get_unit(dev);
394 device_printf(dev, "trying bus number %d\n", sc->ap_bus);
395 }
396
397 /* If this is bus 0 on segment 0, note that it has been seen already. */
398 if (sc->ap_segment == 0 && sc->ap_bus == 0)
399 bus0_seen = 1;
400
401 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
402 }
403
404 /*
405 * Support for standard PCI bridge ivars.
406 */
407 static int
408 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
409 {
410 struct acpi_hpcib_softc *sc = device_get_softc(dev);
411
412 switch (which) {
413 case PCIB_IVAR_DOMAIN:
414 *result = sc->ap_segment;
415 return (0);
416 case PCIB_IVAR_BUS:
417 *result = sc->ap_bus;
418 return (0);
419 case ACPI_IVAR_HANDLE:
420 *result = (uintptr_t)sc->ap_handle;
421 return (0);
422 case ACPI_IVAR_FLAGS:
423 *result = (uintptr_t)sc->ap_flags;
424 return (0);
425 }
426 return (ENOENT);
427 }
428
429 static int
430 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
431 {
432 struct acpi_hpcib_softc *sc = device_get_softc(dev);
433
434 switch (which) {
435 case PCIB_IVAR_DOMAIN:
436 return (EINVAL);
437 case PCIB_IVAR_BUS:
438 sc->ap_bus = value;
439 return (0);
440 case ACPI_IVAR_HANDLE:
441 sc->ap_handle = (ACPI_HANDLE)value;
442 return (0);
443 case ACPI_IVAR_FLAGS:
444 sc->ap_flags = (int)value;
445 return (0);
446 }
447 return (ENOENT);
448 }
449
450 static uint32_t
451 acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
452 u_int reg, int bytes)
453 {
454 return (pci_cfgregread(bus, slot, func, reg, bytes));
455 }
456
457 static void
458 acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
459 u_int reg, uint32_t data, int bytes)
460 {
461 pci_cfgregwrite(bus, slot, func, reg, data, bytes);
462 }
463
464 static int
465 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
466 {
467 struct acpi_hpcib_softc *sc = device_get_softc(pcib);
468
469 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
470 }
471
472 static int
473 acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
474 int *irqs)
475 {
476 device_t bus;
477
478 bus = device_get_parent(pcib);
479 return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
480 irqs));
481 }
482
483 static int
484 acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
485 {
486 device_t bus;
487
488 bus = device_get_parent(pcib);
489 return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
490 }
491
492 static int
493 acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
494 uint32_t *data)
495 {
496 struct acpi_hpcib_softc *sc;
497 device_t bus, hostb;
498 int error;
499
500 bus = device_get_parent(pcib);
501 error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
502 if (error)
503 return (error);
504
505 sc = device_get_softc(dev);
506 if (sc->ap_addr == -1)
507 return (0);
508 /* XXX: Assumes all bridges are on bus 0. */
509 hostb = pci_find_dbsf(sc->ap_segment, 0, ACPI_ADR_PCI_SLOT(sc->ap_addr),
510 ACPI_ADR_PCI_FUNC(sc->ap_addr));
511 if (hostb != NULL)
512 pci_ht_map_msi(hostb, *addr);
513 return (0);
514 }
515
516 struct resource *
517 acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
518 u_long start, u_long end, u_long count, u_int flags)
519 {
520 #ifdef NEW_PCIB
521 struct acpi_hpcib_softc *sc;
522 struct resource *res;
523 #endif
524
525 #if defined(__i386__) || defined(__amd64__)
526 start = hostb_alloc_start(type, start, end, count);
527 #endif
528
529 #ifdef NEW_PCIB
530 sc = device_get_softc(dev);
531 res = pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end,
532 count, flags);
533
534 /*
535 * XXX: If this is a request for a specific range, assume it is
536 * correct and pass it up to the parent. What we probably want to
537 * do long-term is explicitly trust any firmware-configured
538 * resources during the initial bus scan on boot and then disable
539 * this after that.
540 */
541 if (res == NULL && start + count - 1 == end)
542 res = bus_generic_alloc_resource(dev, child, type, rid, start, end,
543 count, flags);
544 return (res);
545 #else
546 return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
547 count, flags));
548 #endif
549 }
550
551 #ifdef NEW_PCIB
552 int
553 acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type,
554 struct resource *r, u_long start, u_long end)
555 {
556 struct acpi_hpcib_softc *sc;
557
558 sc = device_get_softc(dev);
559 return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start,
560 end));
561 }
562 #endif
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