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/10.4/sys/dev/acpica/acpi_resource.c 281687 2015-04-18 08:01:12Z jkim $");
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
139 #if defined(__amd64__) || defined(__i386__)
140 /*
141 * XXX: Certain BIOSes have buggy AML that specify an IRQ that is
142 * edge-sensitive and active-lo. However, edge-sensitive IRQs
143 * should be active-hi. Force IRQs with an ISA IRQ value to be
144 * active-hi instead.
145 */
146 if (irq < 16 && trig == ACPI_EDGE_SENSITIVE && pol == ACPI_ACTIVE_LOW)
147 pol = ACPI_ACTIVE_HIGH;
148 #endif
149 BUS_CONFIG_INTR(dev, irq, (trig == ACPI_EDGE_SENSITIVE) ?
150 INTR_TRIGGER_EDGE : INTR_TRIGGER_LEVEL, (pol == ACPI_ACTIVE_HIGH) ?
151 INTR_POLARITY_HIGH : INTR_POLARITY_LOW);
152 }
153
154 struct acpi_resource_context {
155 struct acpi_parse_resource_set *set;
156 device_t dev;
157 void *context;
158 };
159
160 #ifdef ACPI_DEBUG_OUTPUT
161 static const char *
162 acpi_address_range_name(UINT8 ResourceType)
163 {
164 static char buf[16];
165
166 switch (ResourceType) {
167 case ACPI_MEMORY_RANGE:
168 return ("Memory");
169 case ACPI_IO_RANGE:
170 return ("IO");
171 case ACPI_BUS_NUMBER_RANGE:
172 return ("Bus Number");
173 default:
174 snprintf(buf, sizeof(buf), "type %u", ResourceType);
175 return (buf);
176 }
177 }
178 #endif
179
180 static ACPI_STATUS
181 acpi_parse_resource(ACPI_RESOURCE *res, void *context)
182 {
183 struct acpi_parse_resource_set *set;
184 struct acpi_resource_context *arc;
185 UINT64 min, max, length, gran;
186 const char *name;
187 device_t dev;
188
189 arc = context;
190 dev = arc->dev;
191 set = arc->set;
192
193 switch (res->Type) {
194 case ACPI_RESOURCE_TYPE_END_TAG:
195 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "EndTag\n"));
196 break;
197 case ACPI_RESOURCE_TYPE_FIXED_IO:
198 if (res->Data.FixedIo.AddressLength <= 0)
199 break;
200 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedIo 0x%x/%d\n",
201 res->Data.FixedIo.Address, res->Data.FixedIo.AddressLength));
202 set->set_ioport(dev, arc->context, res->Data.FixedIo.Address,
203 res->Data.FixedIo.AddressLength);
204 break;
205 case ACPI_RESOURCE_TYPE_IO:
206 if (res->Data.Io.AddressLength <= 0)
207 break;
208 if (res->Data.Io.Minimum == res->Data.Io.Maximum) {
209 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x/%d\n",
210 res->Data.Io.Minimum, res->Data.Io.AddressLength));
211 set->set_ioport(dev, arc->context, res->Data.Io.Minimum,
212 res->Data.Io.AddressLength);
213 } else {
214 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x-0x%x/%d\n",
215 res->Data.Io.Minimum, res->Data.Io.Maximum,
216 res->Data.Io.AddressLength));
217 set->set_iorange(dev, arc->context, res->Data.Io.Minimum,
218 res->Data.Io.Maximum, res->Data.Io.AddressLength,
219 res->Data.Io.Alignment);
220 }
221 break;
222 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
223 if (res->Data.FixedMemory32.AddressLength <= 0)
224 break;
225 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedMemory32 0x%x/%d\n",
226 res->Data.FixedMemory32.Address,
227 res->Data.FixedMemory32.AddressLength));
228 set->set_memory(dev, arc->context, res->Data.FixedMemory32.Address,
229 res->Data.FixedMemory32.AddressLength);
230 break;
231 case ACPI_RESOURCE_TYPE_MEMORY32:
232 if (res->Data.Memory32.AddressLength <= 0)
233 break;
234 if (res->Data.Memory32.Minimum == res->Data.Memory32.Maximum) {
235 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x/%d\n",
236 res->Data.Memory32.Minimum, res->Data.Memory32.AddressLength));
237 set->set_memory(dev, arc->context, res->Data.Memory32.Minimum,
238 res->Data.Memory32.AddressLength);
239 } else {
240 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x-0x%x/%d\n",
241 res->Data.Memory32.Minimum, res->Data.Memory32.Maximum,
242 res->Data.Memory32.AddressLength));
243 set->set_memoryrange(dev, arc->context, res->Data.Memory32.Minimum,
244 res->Data.Memory32.Maximum, res->Data.Memory32.AddressLength,
245 res->Data.Memory32.Alignment);
246 }
247 break;
248 case ACPI_RESOURCE_TYPE_MEMORY24:
249 if (res->Data.Memory24.AddressLength <= 0)
250 break;
251 if (res->Data.Memory24.Minimum == res->Data.Memory24.Maximum) {
252 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x/%d\n",
253 res->Data.Memory24.Minimum, res->Data.Memory24.AddressLength));
254 set->set_memory(dev, arc->context, res->Data.Memory24.Minimum,
255 res->Data.Memory24.AddressLength);
256 } else {
257 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x-0x%x/%d\n",
258 res->Data.Memory24.Minimum, res->Data.Memory24.Maximum,
259 res->Data.Memory24.AddressLength));
260 set->set_memoryrange(dev, arc->context, res->Data.Memory24.Minimum,
261 res->Data.Memory24.Maximum, res->Data.Memory24.AddressLength,
262 res->Data.Memory24.Alignment);
263 }
264 break;
265 case ACPI_RESOURCE_TYPE_IRQ:
266 /*
267 * from 1.0b 6.4.2
268 * "This structure is repeated for each separate interrupt
269 * required"
270 */
271 set->set_irq(dev, arc->context, res->Data.Irq.Interrupts,
272 res->Data.Irq.InterruptCount, res->Data.Irq.Triggering,
273 res->Data.Irq.Polarity);
274 break;
275 case ACPI_RESOURCE_TYPE_DMA:
276 /*
277 * from 1.0b 6.4.3
278 * "This structure is repeated for each separate DMA channel
279 * required"
280 */
281 set->set_drq(dev, arc->context, res->Data.Dma.Channels,
282 res->Data.Dma.ChannelCount);
283 break;
284 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
285 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "start dependent functions\n"));
286 set->set_start_dependent(dev, arc->context,
287 res->Data.StartDpf.CompatibilityPriority);
288 break;
289 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
290 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "end dependent functions\n"));
291 set->set_end_dependent(dev, arc->context);
292 break;
293 case ACPI_RESOURCE_TYPE_ADDRESS16:
294 case ACPI_RESOURCE_TYPE_ADDRESS32:
295 case ACPI_RESOURCE_TYPE_ADDRESS64:
296 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
297 switch (res->Type) {
298 case ACPI_RESOURCE_TYPE_ADDRESS16:
299 gran = res->Data.Address16.Address.Granularity;
300 min = res->Data.Address16.Address.Minimum;
301 max = res->Data.Address16.Address.Maximum;
302 length = res->Data.Address16.Address.AddressLength;
303 name = "Address16";
304 break;
305 case ACPI_RESOURCE_TYPE_ADDRESS32:
306 gran = res->Data.Address32.Address.Granularity;
307 min = res->Data.Address32.Address.Minimum;
308 max = res->Data.Address32.Address.Maximum;
309 length = res->Data.Address32.Address.AddressLength;
310 name = "Address32";
311 break;
312 case ACPI_RESOURCE_TYPE_ADDRESS64:
313 gran = res->Data.Address64.Address.Granularity;
314 min = res->Data.Address64.Address.Minimum;
315 max = res->Data.Address64.Address.Maximum;
316 length = res->Data.Address64.Address.AddressLength;
317 name = "Address64";
318 break;
319 default:
320 KASSERT(res->Type == ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
321 ("should never happen"));
322 gran = res->Data.ExtAddress64.Address.Granularity;
323 min = res->Data.ExtAddress64.Address.Minimum;
324 max = res->Data.ExtAddress64.Address.Maximum;
325 length = res->Data.ExtAddress64.Address.AddressLength;
326 name = "ExtAddress64";
327 break;
328 }
329 if (length <= 0)
330 break;
331 if (res->Data.Address.ProducerConsumer != ACPI_CONSUMER) {
332 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
333 "ignored %s %s producer\n", name,
334 acpi_address_range_name(res->Data.Address.ResourceType)));
335 break;
336 }
337 if (res->Data.Address.ResourceType != ACPI_MEMORY_RANGE &&
338 res->Data.Address.ResourceType != ACPI_IO_RANGE) {
339 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
340 "ignored %s for non-memory, non-I/O\n", name));
341 break;
342 }
343
344 #ifdef __i386__
345 if (min > ULONG_MAX || (res->Data.Address.MaxAddressFixed && max >
346 ULONG_MAX)) {
347 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "ignored %s above 4G\n",
348 name));
349 break;
350 }
351 if (max > ULONG_MAX)
352 max = ULONG_MAX;
353 #endif
354 if (res->Data.Address.MinAddressFixed == ACPI_ADDRESS_FIXED &&
355 res->Data.Address.MaxAddressFixed == ACPI_ADDRESS_FIXED) {
356 if (res->Data.Address.ResourceType == ACPI_MEMORY_RANGE) {
357 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s/Memory 0x%jx/%ju\n",
358 name, (uintmax_t)min, (uintmax_t)length));
359 set->set_memory(dev, arc->context, min, length);
360 } else {
361 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s/IO 0x%jx/%ju\n", name,
362 (uintmax_t)min, (uintmax_t)length));
363 set->set_ioport(dev, arc->context, min, length);
364 }
365 } else {
366 if (res->Data.Address32.ResourceType == ACPI_MEMORY_RANGE) {
367 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
368 "%s/Memory 0x%jx-0x%jx/%ju\n", name, (uintmax_t)min,
369 (uintmax_t)max, (uintmax_t)length));
370 set->set_memoryrange(dev, arc->context, min, max, length, gran);
371 } else {
372 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s/IO 0x%jx-0x%jx/%ju\n",
373 name, (uintmax_t)min, (uintmax_t)max, (uintmax_t)length));
374 set->set_iorange(dev, arc->context, min, max, length, gran);
375 }
376 }
377 break;
378 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
379 if (res->Data.ExtendedIrq.ProducerConsumer != ACPI_CONSUMER) {
380 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "ignored ExtIRQ producer\n"));
381 break;
382 }
383 set->set_ext_irq(dev, arc->context, res->Data.ExtendedIrq.Interrupts,
384 res->Data.ExtendedIrq.InterruptCount,
385 res->Data.ExtendedIrq.Triggering, res->Data.ExtendedIrq.Polarity);
386 break;
387 case ACPI_RESOURCE_TYPE_VENDOR:
388 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
389 "unimplemented VendorSpecific resource\n"));
390 break;
391 default:
392 break;
393 }
394 return (AE_OK);
395 }
396
397 /*
398 * Fetch a device's resources and associate them with the device.
399 *
400 * Note that it might be nice to also locate ACPI-specific resource items, such
401 * as GPE bits.
402 *
403 * We really need to split the resource-fetching code out from the
404 * resource-parsing code, since we may want to use the parsing
405 * code for _PRS someday.
406 */
407 ACPI_STATUS
408 acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
409 struct acpi_parse_resource_set *set, void *arg)
410 {
411 struct acpi_resource_context arc;
412 ACPI_STATUS status;
413
414 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
415
416 set->set_init(dev, arg, &arc.context);
417 arc.set = set;
418 arc.dev = dev;
419 status = AcpiWalkResources(handle, "_CRS", acpi_parse_resource, &arc);
420 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
421 printf("can't fetch resources for %s - %s\n",
422 acpi_name(handle), AcpiFormatException(status));
423 return_ACPI_STATUS (status);
424 }
425 set->set_done(dev, arc.context);
426 return_ACPI_STATUS (AE_OK);
427 }
428
429 /*
430 * Resource-set vectors used to attach _CRS-derived resources
431 * to an ACPI device.
432 */
433 static void acpi_res_set_init(device_t dev, void *arg, void **context);
434 static void acpi_res_set_done(device_t dev, void *context);
435 static void acpi_res_set_ioport(device_t dev, void *context,
436 uint64_t base, uint64_t length);
437 static void acpi_res_set_iorange(device_t dev, void *context,
438 uint64_t low, uint64_t high,
439 uint64_t length, uint64_t align);
440 static void acpi_res_set_memory(device_t dev, void *context,
441 uint64_t base, uint64_t length);
442 static void acpi_res_set_memoryrange(device_t dev, void *context,
443 uint64_t low, uint64_t high,
444 uint64_t length, uint64_t align);
445 static void acpi_res_set_irq(device_t dev, void *context, uint8_t *irq,
446 int count, int trig, int pol);
447 static void acpi_res_set_ext_irq(device_t dev, void *context,
448 uint32_t *irq, int count, int trig, int pol);
449 static void acpi_res_set_drq(device_t dev, void *context, uint8_t *drq,
450 int count);
451 static void acpi_res_set_start_dependent(device_t dev, void *context,
452 int preference);
453 static void acpi_res_set_end_dependent(device_t dev, void *context);
454
455 struct acpi_parse_resource_set acpi_res_parse_set = {
456 acpi_res_set_init,
457 acpi_res_set_done,
458 acpi_res_set_ioport,
459 acpi_res_set_iorange,
460 acpi_res_set_memory,
461 acpi_res_set_memoryrange,
462 acpi_res_set_irq,
463 acpi_res_set_ext_irq,
464 acpi_res_set_drq,
465 acpi_res_set_start_dependent,
466 acpi_res_set_end_dependent
467 };
468
469 struct acpi_res_context {
470 int ar_nio;
471 int ar_nmem;
472 int ar_nirq;
473 int ar_ndrq;
474 void *ar_parent;
475 };
476
477 static void
478 acpi_res_set_init(device_t dev, void *arg, void **context)
479 {
480 struct acpi_res_context *cp;
481
482 if ((cp = AcpiOsAllocate(sizeof(*cp))) != NULL) {
483 bzero(cp, sizeof(*cp));
484 cp->ar_parent = arg;
485 *context = cp;
486 }
487 }
488
489 static void
490 acpi_res_set_done(device_t dev, void *context)
491 {
492 struct acpi_res_context *cp = (struct acpi_res_context *)context;
493
494 if (cp == NULL)
495 return;
496 AcpiOsFree(cp);
497 }
498
499 static void
500 acpi_res_set_ioport(device_t dev, void *context, uint64_t base,
501 uint64_t length)
502 {
503 struct acpi_res_context *cp = (struct acpi_res_context *)context;
504
505 if (cp == NULL)
506 return;
507 bus_set_resource(dev, SYS_RES_IOPORT, cp->ar_nio++, base, length);
508 }
509
510 static void
511 acpi_res_set_iorange(device_t dev, void *context, uint64_t low,
512 uint64_t high, uint64_t length, uint64_t align)
513 {
514 struct acpi_res_context *cp = (struct acpi_res_context *)context;
515
516 if (cp == NULL)
517 return;
518 device_printf(dev, "I/O range not supported\n");
519 }
520
521 static void
522 acpi_res_set_memory(device_t dev, void *context, uint64_t base,
523 uint64_t length)
524 {
525 struct acpi_res_context *cp = (struct acpi_res_context *)context;
526
527 if (cp == NULL)
528 return;
529
530 bus_set_resource(dev, SYS_RES_MEMORY, cp->ar_nmem++, base, length);
531 }
532
533 static void
534 acpi_res_set_memoryrange(device_t dev, void *context, uint64_t low,
535 uint64_t high, uint64_t length, uint64_t align)
536 {
537 struct acpi_res_context *cp = (struct acpi_res_context *)context;
538
539 if (cp == NULL)
540 return;
541 device_printf(dev, "memory range not supported\n");
542 }
543
544 static void
545 acpi_res_set_irq(device_t dev, void *context, uint8_t *irq, int count,
546 int trig, int pol)
547 {
548 struct acpi_res_context *cp = (struct acpi_res_context *)context;
549
550 if (cp == NULL || irq == NULL)
551 return;
552
553 /* This implements no resource relocation. */
554 if (count != 1)
555 return;
556
557 bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
558 }
559
560 static void
561 acpi_res_set_ext_irq(device_t dev, void *context, uint32_t *irq, int count,
562 int trig, int pol)
563 {
564 struct acpi_res_context *cp = (struct acpi_res_context *)context;
565
566 if (cp == NULL || irq == NULL)
567 return;
568
569 /* This implements no resource relocation. */
570 if (count != 1)
571 return;
572
573 bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
574 }
575
576 static void
577 acpi_res_set_drq(device_t dev, void *context, uint8_t *drq, int count)
578 {
579 struct acpi_res_context *cp = (struct acpi_res_context *)context;
580
581 if (cp == NULL || drq == NULL)
582 return;
583
584 /* This implements no resource relocation. */
585 if (count != 1)
586 return;
587
588 bus_set_resource(dev, SYS_RES_DRQ, cp->ar_ndrq++, *drq, 1);
589 }
590
591 static void
592 acpi_res_set_start_dependent(device_t dev, void *context, int preference)
593 {
594 struct acpi_res_context *cp = (struct acpi_res_context *)context;
595
596 if (cp == NULL)
597 return;
598 device_printf(dev, "dependent functions not supported\n");
599 }
600
601 static void
602 acpi_res_set_end_dependent(device_t dev, void *context)
603 {
604 struct acpi_res_context *cp = (struct acpi_res_context *)context;
605
606 if (cp == NULL)
607 return;
608 device_printf(dev, "dependent functions not supported\n");
609 }
610
611 /*
612 * Resource-owning placeholders for IO and memory pseudo-devices.
613 *
614 * This code allocates system resources that will be used by ACPI
615 * child devices. The acpi parent manages these resources through a
616 * private rman.
617 */
618
619 static int acpi_sysres_rid = 100;
620
621 static int acpi_sysres_probe(device_t dev);
622 static int acpi_sysres_attach(device_t dev);
623
624 static device_method_t acpi_sysres_methods[] = {
625 /* Device interface */
626 DEVMETHOD(device_probe, acpi_sysres_probe),
627 DEVMETHOD(device_attach, acpi_sysres_attach),
628
629 DEVMETHOD_END
630 };
631
632 static driver_t acpi_sysres_driver = {
633 "acpi_sysresource",
634 acpi_sysres_methods,
635 0,
636 };
637
638 static devclass_t acpi_sysres_devclass;
639 DRIVER_MODULE(acpi_sysresource, acpi, acpi_sysres_driver, acpi_sysres_devclass,
640 0, 0);
641 MODULE_DEPEND(acpi_sysresource, acpi, 1, 1, 1);
642
643 static int
644 acpi_sysres_probe(device_t dev)
645 {
646 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
647
648 if (acpi_disabled("sysresource") ||
649 ACPI_ID_PROBE(device_get_parent(dev), dev, sysres_ids) == NULL)
650 return (ENXIO);
651
652 device_set_desc(dev, "System Resource");
653 device_quiet(dev);
654 return (BUS_PROBE_DEFAULT);
655 }
656
657 static int
658 acpi_sysres_attach(device_t dev)
659 {
660 device_t bus;
661 struct resource_list_entry *bus_rle, *dev_rle;
662 struct resource_list *bus_rl, *dev_rl;
663 int done, type;
664 u_long start, end, count;
665
666 /*
667 * Loop through all current resources to see if the new one overlaps
668 * any existing ones. If so, grow the old one up and/or down
669 * accordingly. Discard any that are wholly contained in the old. If
670 * the resource is unique, add it to the parent. It will later go into
671 * the rman pool.
672 */
673 bus = device_get_parent(dev);
674 dev_rl = BUS_GET_RESOURCE_LIST(bus, dev);
675 bus_rl = BUS_GET_RESOURCE_LIST(device_get_parent(bus), bus);
676 STAILQ_FOREACH(dev_rle, dev_rl, link) {
677 if (dev_rle->type != SYS_RES_IOPORT && dev_rle->type != SYS_RES_MEMORY)
678 continue;
679
680 start = dev_rle->start;
681 end = dev_rle->end;
682 count = dev_rle->count;
683 type = dev_rle->type;
684 done = FALSE;
685
686 STAILQ_FOREACH(bus_rle, bus_rl, link) {
687 if (bus_rle->type != type)
688 continue;
689
690 /* New resource wholly contained in old, discard. */
691 if (start >= bus_rle->start && end <= bus_rle->end)
692 break;
693
694 /* New tail overlaps old head, grow existing resource downward. */
695 if (start < bus_rle->start && end >= bus_rle->start) {
696 bus_rle->count += bus_rle->start - start;
697 bus_rle->start = start;
698 done = TRUE;
699 }
700
701 /* New head overlaps old tail, grow existing resource upward. */
702 if (start <= bus_rle->end && end > bus_rle->end) {
703 bus_rle->count += end - bus_rle->end;
704 bus_rle->end = end;
705 done = TRUE;
706 }
707
708 /* If we adjusted the old resource, we're finished. */
709 if (done)
710 break;
711 }
712
713 /* If we didn't merge with anything, add this resource. */
714 if (bus_rle == NULL)
715 bus_set_resource(bus, type, acpi_sysres_rid++, start, count);
716 }
717
718 /* After merging/moving resources to the parent, free the list. */
719 resource_list_free(dev_rl);
720
721 return (0);
722 }
Cache object: e193d5e5d940d4f3bec0eb38511df9b8
|