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/9.0/sys/dev/acpica/acpi_resource.c 223383 2011-06-21 21:30:20Z jhb $");
30
31 #include "opt_acpi.h"
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/limits.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38
39 #include <machine/bus.h>
40 #include <machine/resource.h>
41 #include <sys/rman.h>
42
43 #include <contrib/dev/acpica/include/acpi.h>
44 #include <contrib/dev/acpica/include/accommon.h>
45
46 #include <dev/acpica/acpivar.h>
47
48 /* Hooks for the ACPI CA debugging infrastructure */
49 #define _COMPONENT ACPI_BUS
50 ACPI_MODULE_NAME("RESOURCE")
51
52 struct lookup_irq_request {
53 ACPI_RESOURCE *acpi_res;
54 struct resource *res;
55 int counter;
56 int rid;
57 int found;
58 };
59
60 static ACPI_STATUS
61 acpi_lookup_irq_handler(ACPI_RESOURCE *res, void *context)
62 {
63 struct lookup_irq_request *req;
64 size_t len;
65 u_int irqnum, irq;
66
67 switch (res->Type) {
68 case ACPI_RESOURCE_TYPE_IRQ:
69 irqnum = res->Data.Irq.InterruptCount;
70 irq = res->Data.Irq.Interrupts[0];
71 len = ACPI_RS_SIZE(ACPI_RESOURCE_IRQ);
72 break;
73 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
74 irqnum = res->Data.ExtendedIrq.InterruptCount;
75 irq = res->Data.ExtendedIrq.Interrupts[0];
76 len = ACPI_RS_SIZE(ACPI_RESOURCE_EXTENDED_IRQ);
77 break;
78 default:
79 return (AE_OK);
80 }
81 if (irqnum != 1)
82 return (AE_OK);
83 req = (struct lookup_irq_request *)context;
84 if (req->counter != req->rid) {
85 req->counter++;
86 return (AE_OK);
87 }
88 req->found = 1;
89 KASSERT(irq == rman_get_start(req->res),
90 ("IRQ resources do not match"));
91 bcopy(res, req->acpi_res, len);
92 return (AE_CTRL_TERMINATE);
93 }
94
95 ACPI_STATUS
96 acpi_lookup_irq_resource(device_t dev, int rid, struct resource *res,
97 ACPI_RESOURCE *acpi_res)
98 {
99 struct lookup_irq_request req;
100 ACPI_STATUS status;
101
102 req.acpi_res = acpi_res;
103 req.res = res;
104 req.counter = 0;
105 req.rid = rid;
106 req.found = 0;
107 status = AcpiWalkResources(acpi_get_handle(dev), "_CRS",
108 acpi_lookup_irq_handler, &req);
109 if (ACPI_SUCCESS(status) && req.found == 0)
110 status = AE_NOT_FOUND;
111 return (status);
112 }
113
114 void
115 acpi_config_intr(device_t dev, ACPI_RESOURCE *res)
116 {
117 u_int irq;
118 int pol, trig;
119
120 switch (res->Type) {
121 case ACPI_RESOURCE_TYPE_IRQ:
122 KASSERT(res->Data.Irq.InterruptCount == 1,
123 ("%s: multiple interrupts", __func__));
124 irq = res->Data.Irq.Interrupts[0];
125 trig = res->Data.Irq.Triggering;
126 pol = res->Data.Irq.Polarity;
127 break;
128 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
129 KASSERT(res->Data.ExtendedIrq.InterruptCount == 1,
130 ("%s: multiple interrupts", __func__));
131 irq = res->Data.ExtendedIrq.Interrupts[0];
132 trig = res->Data.ExtendedIrq.Triggering;
133 pol = res->Data.ExtendedIrq.Polarity;
134 break;
135 default:
136 panic("%s: bad resource type %u", __func__, res->Type);
137 }
138 BUS_CONFIG_INTR(dev, irq, (trig == ACPI_EDGE_SENSITIVE) ?
139 INTR_TRIGGER_EDGE : INTR_TRIGGER_LEVEL, (pol == ACPI_ACTIVE_HIGH) ?
140 INTR_POLARITY_HIGH : INTR_POLARITY_LOW);
141 }
142
143 struct acpi_resource_context {
144 struct acpi_parse_resource_set *set;
145 device_t dev;
146 void *context;
147 };
148
149 #ifdef ACPI_DEBUG_OUTPUT
150 static const char *
151 acpi_address_range_name(UINT8 ResourceType)
152 {
153 static char buf[16];
154
155 switch (ResourceType) {
156 case ACPI_MEMORY_RANGE:
157 return ("Memory");
158 case ACPI_IO_RANGE:
159 return ("IO");
160 case ACPI_BUS_NUMBER_RANGE:
161 return ("Bus Number");
162 default:
163 snprintf(buf, sizeof(buf), "type %u", ResourceType);
164 return (buf);
165 }
166 }
167 #endif
168
169 static ACPI_STATUS
170 acpi_parse_resource(ACPI_RESOURCE *res, void *context)
171 {
172 struct acpi_parse_resource_set *set;
173 struct acpi_resource_context *arc;
174 UINT64 min, max, length, gran;
175 const char *name;
176 device_t dev;
177
178 arc = context;
179 dev = arc->dev;
180 set = arc->set;
181
182 switch (res->Type) {
183 case ACPI_RESOURCE_TYPE_END_TAG:
184 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "EndTag\n"));
185 break;
186 case ACPI_RESOURCE_TYPE_FIXED_IO:
187 if (res->Data.FixedIo.AddressLength <= 0)
188 break;
189 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedIo 0x%x/%d\n",
190 res->Data.FixedIo.Address, res->Data.FixedIo.AddressLength));
191 set->set_ioport(dev, arc->context, res->Data.FixedIo.Address,
192 res->Data.FixedIo.AddressLength);
193 break;
194 case ACPI_RESOURCE_TYPE_IO:
195 if (res->Data.Io.AddressLength <= 0)
196 break;
197 if (res->Data.Io.Minimum == res->Data.Io.Maximum) {
198 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x/%d\n",
199 res->Data.Io.Minimum, res->Data.Io.AddressLength));
200 set->set_ioport(dev, arc->context, res->Data.Io.Minimum,
201 res->Data.Io.AddressLength);
202 } else {
203 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x-0x%x/%d\n",
204 res->Data.Io.Minimum, res->Data.Io.Maximum,
205 res->Data.Io.AddressLength));
206 set->set_iorange(dev, arc->context, res->Data.Io.Minimum,
207 res->Data.Io.Maximum, res->Data.Io.AddressLength,
208 res->Data.Io.Alignment);
209 }
210 break;
211 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
212 if (res->Data.FixedMemory32.AddressLength <= 0)
213 break;
214 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedMemory32 0x%x/%d\n",
215 res->Data.FixedMemory32.Address,
216 res->Data.FixedMemory32.AddressLength));
217 set->set_memory(dev, arc->context, res->Data.FixedMemory32.Address,
218 res->Data.FixedMemory32.AddressLength);
219 break;
220 case ACPI_RESOURCE_TYPE_MEMORY32:
221 if (res->Data.Memory32.AddressLength <= 0)
222 break;
223 if (res->Data.Memory32.Minimum == res->Data.Memory32.Maximum) {
224 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x/%d\n",
225 res->Data.Memory32.Minimum, res->Data.Memory32.AddressLength));
226 set->set_memory(dev, arc->context, res->Data.Memory32.Minimum,
227 res->Data.Memory32.AddressLength);
228 } else {
229 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x-0x%x/%d\n",
230 res->Data.Memory32.Minimum, res->Data.Memory32.Maximum,
231 res->Data.Memory32.AddressLength));
232 set->set_memoryrange(dev, arc->context, res->Data.Memory32.Minimum,
233 res->Data.Memory32.Maximum, res->Data.Memory32.AddressLength,
234 res->Data.Memory32.Alignment);
235 }
236 break;
237 case ACPI_RESOURCE_TYPE_MEMORY24:
238 if (res->Data.Memory24.AddressLength <= 0)
239 break;
240 if (res->Data.Memory24.Minimum == res->Data.Memory24.Maximum) {
241 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x/%d\n",
242 res->Data.Memory24.Minimum, res->Data.Memory24.AddressLength));
243 set->set_memory(dev, arc->context, res->Data.Memory24.Minimum,
244 res->Data.Memory24.AddressLength);
245 } else {
246 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x-0x%x/%d\n",
247 res->Data.Memory24.Minimum, res->Data.Memory24.Maximum,
248 res->Data.Memory24.AddressLength));
249 set->set_memoryrange(dev, arc->context, res->Data.Memory24.Minimum,
250 res->Data.Memory24.Maximum, res->Data.Memory24.AddressLength,
251 res->Data.Memory24.Alignment);
252 }
253 break;
254 case ACPI_RESOURCE_TYPE_IRQ:
255 /*
256 * from 1.0b 6.4.2
257 * "This structure is repeated for each separate interrupt
258 * required"
259 */
260 set->set_irq(dev, arc->context, res->Data.Irq.Interrupts,
261 res->Data.Irq.InterruptCount, res->Data.Irq.Triggering,
262 res->Data.Irq.Polarity);
263 break;
264 case ACPI_RESOURCE_TYPE_DMA:
265 /*
266 * from 1.0b 6.4.3
267 * "This structure is repeated for each separate DMA channel
268 * required"
269 */
270 set->set_drq(dev, arc->context, res->Data.Dma.Channels,
271 res->Data.Dma.ChannelCount);
272 break;
273 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
274 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "start dependent functions\n"));
275 set->set_start_dependent(dev, arc->context,
276 res->Data.StartDpf.CompatibilityPriority);
277 break;
278 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
279 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "end dependent functions\n"));
280 set->set_end_dependent(dev, arc->context);
281 break;
282 case ACPI_RESOURCE_TYPE_ADDRESS16:
283 case ACPI_RESOURCE_TYPE_ADDRESS32:
284 case ACPI_RESOURCE_TYPE_ADDRESS64:
285 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
286 switch (res->Type) {
287 case ACPI_RESOURCE_TYPE_ADDRESS16:
288 gran = res->Data.Address16.Granularity;
289 min = res->Data.Address16.Minimum;
290 max = res->Data.Address16.Maximum;
291 length = res->Data.Address16.AddressLength;
292 name = "Address16";
293 break;
294 case ACPI_RESOURCE_TYPE_ADDRESS32:
295 gran = res->Data.Address32.Granularity;
296 min = res->Data.Address32.Minimum;
297 max = res->Data.Address32.Maximum;
298 length = res->Data.Address32.AddressLength;
299 name = "Address32";
300 break;
301 case ACPI_RESOURCE_TYPE_ADDRESS64:
302 gran = res->Data.Address64.Granularity;
303 min = res->Data.Address64.Minimum;
304 max = res->Data.Address64.Maximum;
305 length = res->Data.Address64.AddressLength;
306 name = "Address64";
307 break;
308 default:
309 KASSERT(res->Type == ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
310 ("should never happen"));
311 gran = res->Data.ExtAddress64.Granularity;
312 min = res->Data.ExtAddress64.Minimum;
313 max = res->Data.ExtAddress64.Maximum;
314 length = res->Data.ExtAddress64.AddressLength;
315 name = "ExtAddress64";
316 break;
317 }
318 if (length <= 0)
319 break;
320 if (res->Data.Address.ProducerConsumer != ACPI_CONSUMER) {
321 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
322 "ignored %s %s producer\n", name,
323 acpi_address_range_name(res->Data.Address.ResourceType)));
324 break;
325 }
326 if (res->Data.Address.ResourceType != ACPI_MEMORY_RANGE &&
327 res->Data.Address.ResourceType != ACPI_IO_RANGE) {
328 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
329 "ignored %s for non-memory, non-I/O\n", name));
330 break;
331 }
332
333 #ifdef __i386__
334 if (min > ULONG_MAX || (res->Data.Address.MaxAddressFixed && max >
335 ULONG_MAX)) {
336 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "ignored %s above 4G\n",
337 name));
338 break;
339 }
340 if (max > ULONG_MAX)
341 max = ULONG_MAX;
342 #endif
343 if (res->Data.Address.MinAddressFixed == ACPI_ADDRESS_FIXED &&
344 res->Data.Address.MaxAddressFixed == ACPI_ADDRESS_FIXED) {
345 if (res->Data.Address.ResourceType == ACPI_MEMORY_RANGE) {
346 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s/Memory 0x%jx/%ju\n",
347 name, (uintmax_t)min, (uintmax_t)length));
348 set->set_memory(dev, arc->context, min, length);
349 } else {
350 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s/IO 0x%jx/%ju\n", name,
351 (uintmax_t)min, (uintmax_t)length));
352 set->set_ioport(dev, arc->context, min, length);
353 }
354 } else {
355 if (res->Data.Address32.ResourceType == ACPI_MEMORY_RANGE) {
356 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
357 "%s/Memory 0x%jx-0x%jx/%ju\n", name, (uintmax_t)min,
358 (uintmax_t)max, (uintmax_t)length));
359 set->set_memoryrange(dev, arc->context, min, max, length, gran);
360 } else {
361 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s/IO 0x%jx-0x%jx/%ju\n",
362 name, (uintmax_t)min, (uintmax_t)max, (uintmax_t)length));
363 set->set_iorange(dev, arc->context, min, max, length, gran);
364 }
365 }
366 break;
367 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
368 if (res->Data.ExtendedIrq.ProducerConsumer != ACPI_CONSUMER) {
369 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "ignored ExtIRQ producer\n"));
370 break;
371 }
372 set->set_ext_irq(dev, arc->context, res->Data.ExtendedIrq.Interrupts,
373 res->Data.ExtendedIrq.InterruptCount,
374 res->Data.ExtendedIrq.Triggering, res->Data.ExtendedIrq.Polarity);
375 break;
376 case ACPI_RESOURCE_TYPE_VENDOR:
377 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
378 "unimplemented VendorSpecific resource\n"));
379 break;
380 default:
381 break;
382 }
383 return (AE_OK);
384 }
385
386 /*
387 * Fetch a device's resources and associate them with the device.
388 *
389 * Note that it might be nice to also locate ACPI-specific resource items, such
390 * as GPE bits.
391 *
392 * We really need to split the resource-fetching code out from the
393 * resource-parsing code, since we may want to use the parsing
394 * code for _PRS someday.
395 */
396 ACPI_STATUS
397 acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
398 struct acpi_parse_resource_set *set, void *arg)
399 {
400 struct acpi_resource_context arc;
401 ACPI_STATUS status;
402
403 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
404
405 set->set_init(dev, arg, &arc.context);
406 arc.set = set;
407 arc.dev = dev;
408 status = AcpiWalkResources(handle, "_CRS", acpi_parse_resource, &arc);
409 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
410 printf("can't fetch resources for %s - %s\n",
411 acpi_name(handle), AcpiFormatException(status));
412 return_ACPI_STATUS (status);
413 }
414 set->set_done(dev, arc.context);
415 return_ACPI_STATUS (AE_OK);
416 }
417
418 /*
419 * Resource-set vectors used to attach _CRS-derived resources
420 * to an ACPI device.
421 */
422 static void acpi_res_set_init(device_t dev, void *arg, void **context);
423 static void acpi_res_set_done(device_t dev, void *context);
424 static void acpi_res_set_ioport(device_t dev, void *context,
425 uint64_t base, uint64_t length);
426 static void acpi_res_set_iorange(device_t dev, void *context,
427 uint64_t low, uint64_t high,
428 uint64_t length, uint64_t align);
429 static void acpi_res_set_memory(device_t dev, void *context,
430 uint64_t base, uint64_t length);
431 static void acpi_res_set_memoryrange(device_t dev, void *context,
432 uint64_t low, uint64_t high,
433 uint64_t length, uint64_t align);
434 static void acpi_res_set_irq(device_t dev, void *context, uint8_t *irq,
435 int count, int trig, int pol);
436 static void acpi_res_set_ext_irq(device_t dev, void *context,
437 uint32_t *irq, int count, int trig, int pol);
438 static void acpi_res_set_drq(device_t dev, void *context, uint8_t *drq,
439 int count);
440 static void acpi_res_set_start_dependent(device_t dev, void *context,
441 int preference);
442 static void acpi_res_set_end_dependent(device_t dev, void *context);
443
444 struct acpi_parse_resource_set acpi_res_parse_set = {
445 acpi_res_set_init,
446 acpi_res_set_done,
447 acpi_res_set_ioport,
448 acpi_res_set_iorange,
449 acpi_res_set_memory,
450 acpi_res_set_memoryrange,
451 acpi_res_set_irq,
452 acpi_res_set_ext_irq,
453 acpi_res_set_drq,
454 acpi_res_set_start_dependent,
455 acpi_res_set_end_dependent
456 };
457
458 struct acpi_res_context {
459 int ar_nio;
460 int ar_nmem;
461 int ar_nirq;
462 int ar_ndrq;
463 void *ar_parent;
464 };
465
466 static void
467 acpi_res_set_init(device_t dev, void *arg, void **context)
468 {
469 struct acpi_res_context *cp;
470
471 if ((cp = AcpiOsAllocate(sizeof(*cp))) != NULL) {
472 bzero(cp, sizeof(*cp));
473 cp->ar_parent = arg;
474 *context = cp;
475 }
476 }
477
478 static void
479 acpi_res_set_done(device_t dev, void *context)
480 {
481 struct acpi_res_context *cp = (struct acpi_res_context *)context;
482
483 if (cp == NULL)
484 return;
485 AcpiOsFree(cp);
486 }
487
488 static void
489 acpi_res_set_ioport(device_t dev, void *context, uint64_t base,
490 uint64_t length)
491 {
492 struct acpi_res_context *cp = (struct acpi_res_context *)context;
493
494 if (cp == NULL)
495 return;
496 bus_set_resource(dev, SYS_RES_IOPORT, cp->ar_nio++, base, length);
497 }
498
499 static void
500 acpi_res_set_iorange(device_t dev, void *context, uint64_t low,
501 uint64_t high, uint64_t length, uint64_t align)
502 {
503 struct acpi_res_context *cp = (struct acpi_res_context *)context;
504
505 if (cp == NULL)
506 return;
507 device_printf(dev, "I/O range not supported\n");
508 }
509
510 static void
511 acpi_res_set_memory(device_t dev, void *context, uint64_t base,
512 uint64_t length)
513 {
514 struct acpi_res_context *cp = (struct acpi_res_context *)context;
515
516 if (cp == NULL)
517 return;
518
519 bus_set_resource(dev, SYS_RES_MEMORY, cp->ar_nmem++, base, length);
520 }
521
522 static void
523 acpi_res_set_memoryrange(device_t dev, void *context, uint64_t low,
524 uint64_t high, uint64_t length, uint64_t align)
525 {
526 struct acpi_res_context *cp = (struct acpi_res_context *)context;
527
528 if (cp == NULL)
529 return;
530 device_printf(dev, "memory range not supported\n");
531 }
532
533 static void
534 acpi_res_set_irq(device_t dev, void *context, uint8_t *irq, int count,
535 int trig, int pol)
536 {
537 struct acpi_res_context *cp = (struct acpi_res_context *)context;
538
539 if (cp == NULL || irq == NULL)
540 return;
541
542 /* This implements no resource relocation. */
543 if (count != 1)
544 return;
545
546 bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
547 }
548
549 static void
550 acpi_res_set_ext_irq(device_t dev, void *context, uint32_t *irq, int count,
551 int trig, int pol)
552 {
553 struct acpi_res_context *cp = (struct acpi_res_context *)context;
554
555 if (cp == NULL || irq == NULL)
556 return;
557
558 /* This implements no resource relocation. */
559 if (count != 1)
560 return;
561
562 bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
563 }
564
565 static void
566 acpi_res_set_drq(device_t dev, void *context, uint8_t *drq, int count)
567 {
568 struct acpi_res_context *cp = (struct acpi_res_context *)context;
569
570 if (cp == NULL || drq == NULL)
571 return;
572
573 /* This implements no resource relocation. */
574 if (count != 1)
575 return;
576
577 bus_set_resource(dev, SYS_RES_DRQ, cp->ar_ndrq++, *drq, 1);
578 }
579
580 static void
581 acpi_res_set_start_dependent(device_t dev, void *context, int preference)
582 {
583 struct acpi_res_context *cp = (struct acpi_res_context *)context;
584
585 if (cp == NULL)
586 return;
587 device_printf(dev, "dependent functions not supported\n");
588 }
589
590 static void
591 acpi_res_set_end_dependent(device_t dev, void *context)
592 {
593 struct acpi_res_context *cp = (struct acpi_res_context *)context;
594
595 if (cp == NULL)
596 return;
597 device_printf(dev, "dependent functions not supported\n");
598 }
599
600 /*
601 * Resource-owning placeholders for IO and memory pseudo-devices.
602 *
603 * This code allocates system resources that will be used by ACPI
604 * child devices. The acpi parent manages these resources through a
605 * private rman.
606 */
607
608 static int acpi_sysres_rid = 100;
609
610 static int acpi_sysres_probe(device_t dev);
611 static int acpi_sysres_attach(device_t dev);
612
613 static device_method_t acpi_sysres_methods[] = {
614 /* Device interface */
615 DEVMETHOD(device_probe, acpi_sysres_probe),
616 DEVMETHOD(device_attach, acpi_sysres_attach),
617
618 {0, 0}
619 };
620
621 static driver_t acpi_sysres_driver = {
622 "acpi_sysresource",
623 acpi_sysres_methods,
624 0,
625 };
626
627 static devclass_t acpi_sysres_devclass;
628 DRIVER_MODULE(acpi_sysresource, acpi, acpi_sysres_driver, acpi_sysres_devclass,
629 0, 0);
630 MODULE_DEPEND(acpi_sysresource, acpi, 1, 1, 1);
631
632 static int
633 acpi_sysres_probe(device_t dev)
634 {
635 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
636
637 if (acpi_disabled("sysresource") ||
638 ACPI_ID_PROBE(device_get_parent(dev), dev, sysres_ids) == NULL)
639 return (ENXIO);
640
641 device_set_desc(dev, "System Resource");
642 device_quiet(dev);
643 return (BUS_PROBE_DEFAULT);
644 }
645
646 static int
647 acpi_sysres_attach(device_t dev)
648 {
649 device_t bus;
650 struct resource_list_entry *bus_rle, *dev_rle;
651 struct resource_list *bus_rl, *dev_rl;
652 int done, type;
653 u_long start, end, count;
654
655 /*
656 * Loop through all current resources to see if the new one overlaps
657 * any existing ones. If so, grow the old one up and/or down
658 * accordingly. Discard any that are wholly contained in the old. If
659 * the resource is unique, add it to the parent. It will later go into
660 * the rman pool.
661 */
662 bus = device_get_parent(dev);
663 dev_rl = BUS_GET_RESOURCE_LIST(bus, dev);
664 bus_rl = BUS_GET_RESOURCE_LIST(device_get_parent(bus), bus);
665 STAILQ_FOREACH(dev_rle, dev_rl, link) {
666 if (dev_rle->type != SYS_RES_IOPORT && dev_rle->type != SYS_RES_MEMORY)
667 continue;
668
669 start = dev_rle->start;
670 end = dev_rle->end;
671 count = dev_rle->count;
672 type = dev_rle->type;
673 done = FALSE;
674
675 STAILQ_FOREACH(bus_rle, bus_rl, link) {
676 if (bus_rle->type != type)
677 continue;
678
679 /* New resource wholly contained in old, discard. */
680 if (start >= bus_rle->start && end <= bus_rle->end)
681 break;
682
683 /* New tail overlaps old head, grow existing resource downward. */
684 if (start < bus_rle->start && end >= bus_rle->start) {
685 bus_rle->count += bus_rle->start - start;
686 bus_rle->start = start;
687 done = TRUE;
688 }
689
690 /* New head overlaps old tail, grow existing resource upward. */
691 if (start <= bus_rle->end && end > bus_rle->end) {
692 bus_rle->count += end - bus_rle->end;
693 bus_rle->end = end;
694 done = TRUE;
695 }
696
697 /* If we adjusted the old resource, we're finished. */
698 if (done)
699 break;
700 }
701
702 /* If we didn't merge with anything, add this resource. */
703 if (bus_rle == NULL)
704 bus_set_resource(bus, type, acpi_sysres_rid++, start, count);
705 }
706
707 /* After merging/moving resources to the parent, free the list. */
708 resource_list_free(dev_rl);
709
710 return (0);
711 }
Cache object: 3fb7c80e1d92816517533d8a0f18428c
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