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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pci / hotplug / pciehprm_acpi.c
blob57f4e6d1b27cb39c5c40704789f39a6693a04925
1 /*
2 * PCIEHPRM ACPI: PHP Resource Manager for ACPI platform
3 *
4 * Copyright (C) 2003-2004 Intel Corporation
5 *
6 * All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
16 * NON INFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Send feedback to <dely.l.sy@intel.com>
24 *
25 */
26
27 #include <linux/config.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/types.h>
31 #include <linux/pci.h>
32 #include <linux/init.h>
33 #include <linux/acpi.h>
34 #include <linux/efi.h>
35 #include <linux/pci-acpi.h>
36 #include <asm/uaccess.h>
37 #include <asm/system.h>
38 #ifdef CONFIG_IA64
39 #include <asm/iosapic.h>
40 #endif
41 #include <acpi/acpi.h>
42 #include <acpi/acpi_bus.h>
43 #include <acpi/actypes.h>
44 #include "pciehp.h"
45 #include "pciehprm.h"
46
47 #define PCI_MAX_BUS 0x100
48 #define ACPI_STA_DEVICE_PRESENT 0x01
49
50 #define METHOD_NAME__SUN "_SUN"
51 #define METHOD_NAME__HPP "_HPP"
52 #define METHOD_NAME_OSHP "OSHP"
53
54 /* Status code for running acpi method to gain native control */
55 #define NC_NOT_RUN 0
56 #define OSC_NOT_EXIST 1
57 #define OSC_RUN_FAILED 2
58 #define OSHP_NOT_EXIST 3
59 #define OSHP_RUN_FAILED 4
60 #define NC_RUN_SUCCESS 5
61
62 #define PHP_RES_BUS 0xA0
63 #define PHP_RES_IO 0xA1
64 #define PHP_RES_MEM 0xA2
65 #define PHP_RES_PMEM 0xA3
66
67 #define BRIDGE_TYPE_P2P 0x00
68 #define BRIDGE_TYPE_HOST 0x01
69
70 /* this should go to drivers/acpi/include/ */
71 struct acpi__hpp {
72 u8 cache_line_size;
73 u8 latency_timer;
74 u8 enable_serr;
75 u8 enable_perr;
76 };
77
78 struct acpi_php_slot {
79 struct acpi_php_slot *next;
80 struct acpi_bridge *bridge;
81 acpi_handle handle;
82 int seg;
83 int bus;
84 int dev;
85 int fun;
86 u32 sun;
87 struct pci_resource *mem_head;
88 struct pci_resource *p_mem_head;
89 struct pci_resource *io_head;
90 struct pci_resource *bus_head;
91 void *slot_ops; /* _STA, _EJx, etc */
92 struct slot *slot;
93 }; /* per func */
94
95 struct acpi_bridge {
96 struct acpi_bridge *parent;
97 struct acpi_bridge *next;
98 struct acpi_bridge *child;
99 acpi_handle handle;
100 int seg;
101 int pbus; /* pdev->bus->number */
102 int pdevice; /* PCI_SLOT(pdev->devfn) */
103 int pfunction; /* PCI_DEVFN(pdev->devfn) */
104 int bus; /* pdev->subordinate->number */
105 struct acpi__hpp *_hpp;
106 struct acpi_php_slot *slots;
107 struct pci_resource *tmem_head; /* total from crs */
108 struct pci_resource *tp_mem_head; /* total from crs */
109 struct pci_resource *tio_head; /* total from crs */
110 struct pci_resource *tbus_head; /* total from crs */
111 struct pci_resource *mem_head; /* available */
112 struct pci_resource *p_mem_head; /* available */
113 struct pci_resource *io_head; /* available */
114 struct pci_resource *bus_head; /* available */
115 int scanned;
116 int type;
117 };
118
119 static struct acpi_bridge *acpi_bridges_head;
120
121 static u8 * acpi_path_name( acpi_handle handle)
122 {
123 acpi_status status;
124 static u8 path_name[ACPI_PATHNAME_MAX];
125 struct acpi_buffer ret_buf = { ACPI_PATHNAME_MAX, path_name };
126
127 memset(path_name, 0, sizeof (path_name));
128 status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
129
130 if (ACPI_FAILURE(status))
131 return NULL;
132 else
133 return path_name;
134 }
135
136 static void acpi_get__hpp ( struct acpi_bridge *ab);
137 static int acpi_run_oshp ( struct acpi_bridge *ab);
138 static int osc_run_status = NC_NOT_RUN;
139 static int oshp_run_status = NC_NOT_RUN;
140
141 static int acpi_add_slot_to_php_slots(
142 struct acpi_bridge *ab,
143 int bus_num,
144 acpi_handle handle,
145 u32 adr,
146 u32 sun
147 )
148 {
149 struct acpi_php_slot *aps;
150 static long samesun = -1;
151
152 aps = (struct acpi_php_slot *) kmalloc (sizeof(struct acpi_php_slot), GFP_KERNEL);
153 if (!aps) {
154 err ("acpi_pciehprm: alloc for aps fail\n");
155 return -1;
156 }
157 memset(aps, 0, sizeof(struct acpi_php_slot));
158
159 aps->handle = handle;
160 aps->bus = bus_num;
161 aps->dev = (adr >> 16) & 0xffff;
162 aps->fun = adr & 0xffff;
163 aps->sun = sun;
164
165 aps->next = ab->slots; /* cling to the bridge */
166 aps->bridge = ab;
167 ab->slots = aps;
168
169 ab->scanned += 1;
170 if (!ab->_hpp)
171 acpi_get__hpp(ab);
172
173 if (osc_run_status == OSC_NOT_EXIST)
174 oshp_run_status = acpi_run_oshp(ab);
175
176 if (sun != samesun) {
177 info("acpi_pciehprm: Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n",
178 aps->sun, ab->seg, aps->bus, aps->dev, aps->fun);
179 samesun = sun;
180 }
181 return 0;
182 }
183
184 static void acpi_get__hpp ( struct acpi_bridge *ab)
185 {
186 acpi_status status;
187 u8 nui[4];
188 struct acpi_buffer ret_buf = { 0, NULL};
189 union acpi_object *ext_obj, *package;
190 u8 *path_name = acpi_path_name(ab->handle);
191 int i, len = 0;
192
193 /* get _hpp */
194 status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
195 switch (status) {
196 case AE_BUFFER_OVERFLOW:
197 ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
198 if (!ret_buf.pointer) {
199 err ("acpi_pciehprm:%s alloc for _HPP fail\n", path_name);
200 return;
201 }
202 status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
203 if (ACPI_SUCCESS(status))
204 break;
205 default:
206 if (ACPI_FAILURE(status)) {
207 err("acpi_pciehprm:%s _HPP fail=0x%x\n", path_name, status);
208 return;
209 }
210 }
211
212 ext_obj = (union acpi_object *) ret_buf.pointer;
213 if (ext_obj->type != ACPI_TYPE_PACKAGE) {
214 err ("acpi_pciehprm:%s _HPP obj not a package\n", path_name);
215 goto free_and_return;
216 }
217
218 len = ext_obj->package.count;
219 package = (union acpi_object *) ret_buf.pointer;
220 for ( i = 0; (i < len) || (i < 4); i++) {
221 ext_obj = (union acpi_object *) &package->package.elements[i];
222 switch (ext_obj->type) {
223 case ACPI_TYPE_INTEGER:
224 nui[i] = (u8)ext_obj->integer.value;
225 break;
226 default:
227 err ("acpi_pciehprm:%s _HPP obj type incorrect\n", path_name);
228 goto free_and_return;
229 }
230 }
231
232 ab->_hpp = kmalloc (sizeof (struct acpi__hpp), GFP_KERNEL);
233 if (!ab->_hpp) {
234 err ("acpi_pciehprm:%s alloc for _HPP failed\n", path_name);
235 goto free_and_return;
236 }
237 memset(ab->_hpp, 0, sizeof(struct acpi__hpp));
238
239 ab->_hpp->cache_line_size = nui[0];
240 ab->_hpp->latency_timer = nui[1];
241 ab->_hpp->enable_serr = nui[2];
242 ab->_hpp->enable_perr = nui[3];
243
244 dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
245 dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
246 dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
247 dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
248
249 free_and_return:
250 kfree(ret_buf.pointer);
251 }
252
253 static int acpi_run_oshp ( struct acpi_bridge *ab)
254 {
255 acpi_status status;
256 u8 *path_name = acpi_path_name(ab->handle);
257
258 /* run OSHP */
259 status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, NULL);
260 if (ACPI_FAILURE(status)) {
261 err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status);
262 oshp_run_status = (status == AE_NOT_FOUND) ? OSHP_NOT_EXIST : OSHP_RUN_FAILED;
263 } else {
264 oshp_run_status = NC_RUN_SUCCESS;
265 dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status);
266 dbg("acpi_pciehprm:%s oshp_run_status =0x%x\n", path_name, oshp_run_status);
267 }
268 return oshp_run_status;
269 }
270
271 static acpi_status acpi_evaluate_crs(
272 acpi_handle handle,
273 struct acpi_resource **retbuf
274 )
275 {
276 acpi_status status;
277 struct acpi_buffer crsbuf;
278 u8 *path_name = acpi_path_name(handle);
279
280 crsbuf.length = 0;
281 crsbuf.pointer = NULL;
282
283 status = acpi_get_current_resources (handle, &crsbuf);
284
285 switch (status) {
286 case AE_BUFFER_OVERFLOW:
287 break; /* found */
288 case AE_NOT_FOUND:
289 dbg("acpi_pciehprm:%s _CRS not found\n", path_name);
290 return status;
291 default:
292 err ("acpi_pciehprm:%s _CRS fail=0x%x\n", path_name, status);
293 return status;
294 }
295
296 crsbuf.pointer = kmalloc (crsbuf.length, GFP_KERNEL);
297 if (!crsbuf.pointer) {
298 err ("acpi_pciehprm: alloc %ld bytes for %s _CRS fail\n", (ulong)crsbuf.length, path_name);
299 return AE_NO_MEMORY;
300 }
301
302 status = acpi_get_current_resources (handle, &crsbuf);
303 if (ACPI_FAILURE(status)) {
304 err("acpi_pciehprm: %s _CRS fail=0x%x.\n", path_name, status);
305 kfree(crsbuf.pointer);
306 return status;
307 }
308
309 *retbuf = crsbuf.pointer;
310
311 return status;
312 }
313
314 static void free_pci_resource ( struct pci_resource *aprh)
315 {
316 struct pci_resource *res, *next;
317
318 for (res = aprh; res; res = next) {
319 next = res->next;
320 kfree(res);
321 }
322 }
323
324 static void print_pci_resource ( struct pci_resource *aprh)
325 {
326 struct pci_resource *res;
327
328 for (res = aprh; res; res = res->next)
329 dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
330 }
331
332 static void print_slot_resources( struct acpi_php_slot *aps)
333 {
334 if (aps->bus_head) {
335 dbg(" BUS Resources:\n");
336 print_pci_resource (aps->bus_head);
337 }
338
339 if (aps->io_head) {
340 dbg(" IO Resources:\n");
341 print_pci_resource (aps->io_head);
342 }
343
344 if (aps->mem_head) {
345 dbg(" MEM Resources:\n");
346 print_pci_resource (aps->mem_head);
347 }
348
349 if (aps->p_mem_head) {
350 dbg(" PMEM Resources:\n");
351 print_pci_resource (aps->p_mem_head);
352 }
353 }
354
355 static void print_pci_resources( struct acpi_bridge *ab)
356 {
357 if (ab->tbus_head) {
358 dbg(" Total BUS Resources:\n");
359 print_pci_resource (ab->tbus_head);
360 }
361 if (ab->bus_head) {
362 dbg(" BUS Resources:\n");
363 print_pci_resource (ab->bus_head);
364 }
365
366 if (ab->tio_head) {
367 dbg(" Total IO Resources:\n");
368 print_pci_resource (ab->tio_head);
369 }
370 if (ab->io_head) {
371 dbg(" IO Resources:\n");
372 print_pci_resource (ab->io_head);
373 }
374
375 if (ab->tmem_head) {
376 dbg(" Total MEM Resources:\n");
377 print_pci_resource (ab->tmem_head);
378 }
379 if (ab->mem_head) {
380 dbg(" MEM Resources:\n");
381 print_pci_resource (ab->mem_head);
382 }
383
384 if (ab->tp_mem_head) {
385 dbg(" Total PMEM Resources:\n");
386 print_pci_resource (ab->tp_mem_head);
387 }
388 if (ab->p_mem_head) {
389 dbg(" PMEM Resources:\n");
390 print_pci_resource (ab->p_mem_head);
391 }
392 if (ab->_hpp) {
393 dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
394 dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
395 dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
396 dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
397 }
398 }
399
400 static int pciehprm_delete_resource(
401 struct pci_resource **aprh,
402 ulong base,
403 ulong size)
404 {
405 struct pci_resource *res;
406 struct pci_resource *prevnode;
407 struct pci_resource *split_node;
408 ulong tbase;
409
410 pciehp_resource_sort_and_combine(aprh);
411
412 for (res = *aprh; res; res = res->next) {
413 if (res->base > base)
414 continue;
415
416 if ((res->base + res->length) < (base + size))
417 continue;
418
419 if (res->base < base) {
420 tbase = base;
421
422 if ((res->length - (tbase - res->base)) < size)
423 continue;
424
425 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
426 if (!split_node)
427 return -ENOMEM;
428
429 split_node->base = res->base;
430 split_node->length = tbase - res->base;
431 res->base = tbase;
432 res->length -= split_node->length;
433
434 split_node->next = res->next;
435 res->next = split_node;
436 }
437
438 if (res->length >= size) {
439 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
440 if (!split_node)
441 return -ENOMEM;
442
443 split_node->base = res->base + size;
444 split_node->length = res->length - size;
445 res->length = size;
446
447 split_node->next = res->next;
448 res->next = split_node;
449 }
450
451 if (*aprh == res) {
452 *aprh = res->next;
453 } else {
454 prevnode = *aprh;
455 while (prevnode->next != res)
456 prevnode = prevnode->next;
457
458 prevnode->next = res->next;
459 }
460 res->next = NULL;
461 kfree(res);
462 break;
463 }
464
465 return 0;
466 }
467
468 static int pciehprm_delete_resources(
469 struct pci_resource **aprh,
470 struct pci_resource *this
471 )
472 {
473 struct pci_resource *res;
474
475 for (res = this; res; res = res->next)
476 pciehprm_delete_resource(aprh, res->base, res->length);
477
478 return 0;
479 }
480
481 static int pciehprm_add_resource(
482 struct pci_resource **aprh,
483 ulong base,
484 ulong size)
485 {
486 struct pci_resource *res;
487
488 for (res = *aprh; res; res = res->next) {
489 if ((res->base + res->length) == base) {
490 res->length += size;
491 size = 0L;
492 break;
493 }
494 if (res->next == *aprh)
495 break;
496 }
497
498 if (size) {
499 res = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
500 if (!res) {
501 err ("acpi_pciehprm: alloc for res fail\n");
502 return -ENOMEM;
503 }
504 memset(res, 0, sizeof (struct pci_resource));
505
506 res->base = base;
507 res->length = size;
508 res->next = *aprh;
509 *aprh = res;
510 }
511
512 return 0;
513 }
514
515 static int pciehprm_add_resources(
516 struct pci_resource **aprh,
517 struct pci_resource *this
518 )
519 {
520 struct pci_resource *res;
521 int rc = 0;
522
523 for (res = this; res && !rc; res = res->next)
524 rc = pciehprm_add_resource(aprh, res->base, res->length);
525
526 return rc;
527 }
528
529 static void acpi_parse_io (
530 struct acpi_bridge *ab,
531 union acpi_resource_data *data
532 )
533 {
534 struct acpi_resource_io *dataio;
535 dataio = (struct acpi_resource_io *) data;
536
537 dbg("Io Resource\n");
538 dbg(" %d bit decode\n", ACPI_DECODE_16 == dataio->io_decode ? 16:10);
539 dbg(" Range minimum base: %08X\n", dataio->min_base_address);
540 dbg(" Range maximum base: %08X\n", dataio->max_base_address);
541 dbg(" Alignment: %08X\n", dataio->alignment);
542 dbg(" Range Length: %08X\n", dataio->range_length);
543 }
544
545 static void acpi_parse_fixed_io (
546 struct acpi_bridge *ab,
547 union acpi_resource_data *data
548 )
549 {
550 struct acpi_resource_fixed_io *datafio;
551 datafio = (struct acpi_resource_fixed_io *) data;
552
553 dbg("Fixed Io Resource\n");
554 dbg(" Range base address: %08X", datafio->base_address);
555 dbg(" Range length: %08X", datafio->range_length);
556 }
557
558 static void acpi_parse_address16_32 (
559 struct acpi_bridge *ab,
560 union acpi_resource_data *data,
561 acpi_resource_type id
562 )
563 {
564 /*
565 * acpi_resource_address16 == acpi_resource_address32
566 * acpi_resource_address16 *data16 = (acpi_resource_address16 *) data;
567 */
568 struct acpi_resource_address32 *data32 = (struct acpi_resource_address32 *) data;
569 struct pci_resource **aprh, **tprh;
570
571 if (id == ACPI_RSTYPE_ADDRESS16)
572 dbg("acpi_pciehprm:16-Bit Address Space Resource\n");
573 else
574 dbg("acpi_pciehprm:32-Bit Address Space Resource\n");
575
576 switch (data32->resource_type) {
577 case ACPI_MEMORY_RANGE:
578 dbg(" Resource Type: Memory Range\n");
579 aprh = &ab->mem_head;
580 tprh = &ab->tmem_head;
581
582 switch (data32->attribute.memory.cache_attribute) {
583 case ACPI_NON_CACHEABLE_MEMORY:
584 dbg(" Type Specific: Noncacheable memory\n");
585 break;
586 case ACPI_CACHABLE_MEMORY:
587 dbg(" Type Specific: Cacheable memory\n");
588 break;
589 case ACPI_WRITE_COMBINING_MEMORY:
590 dbg(" Type Specific: Write-combining memory\n");
591 break;
592 case ACPI_PREFETCHABLE_MEMORY:
593 aprh = &ab->p_mem_head;
594 dbg(" Type Specific: Prefetchable memory\n");
595 break;
596 default:
597 dbg(" Type Specific: Invalid cache attribute\n");
598 break;
599 }
600
601 dbg(" Type Specific: Read%s\n", ACPI_READ_WRITE_MEMORY == data32->attribute.memory.read_write_attribute ? "/Write":" Only");
602 break;
603
604 case ACPI_IO_RANGE:
605 dbg(" Resource Type: I/O Range\n");
606 aprh = &ab->io_head;
607 tprh = &ab->tio_head;
608
609 switch (data32->attribute.io.range_attribute) {
610 case ACPI_NON_ISA_ONLY_RANGES:
611 dbg(" Type Specific: Non-ISA Io Addresses\n");
612 break;
613 case ACPI_ISA_ONLY_RANGES:
614 dbg(" Type Specific: ISA Io Addresses\n");
615 break;
616 case ACPI_ENTIRE_RANGE:
617 dbg(" Type Specific: ISA and non-ISA Io Addresses\n");
618 break;
619 default:
620 dbg(" Type Specific: Invalid range attribute\n");
621 break;
622 }
623 break;
624
625 case ACPI_BUS_NUMBER_RANGE:
626 dbg(" Resource Type: Bus Number Range(fixed)\n");
627 /* fixup to be compatible with the rest of php driver */
628 data32->min_address_range++;
629 data32->address_length--;
630 aprh = &ab->bus_head;
631 tprh = &ab->tbus_head;
632 break;
633 default:
634 dbg(" Resource Type: Invalid resource type. Exiting.\n");
635 return;
636 }
637
638 dbg(" Resource %s\n", ACPI_CONSUMER == data32->producer_consumer ? "Consumer":"Producer");
639 dbg(" %s decode\n", ACPI_SUB_DECODE == data32->decode ? "Subtractive":"Positive");
640 dbg(" Min address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->min_address_fixed ? "":"not");
641 dbg(" Max address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->max_address_fixed ? "":"not");
642 dbg(" Granularity: %08X\n", data32->granularity);
643 dbg(" Address range min: %08X\n", data32->min_address_range);
644 dbg(" Address range max: %08X\n", data32->max_address_range);
645 dbg(" Address translation offset: %08X\n", data32->address_translation_offset);
646 dbg(" Address Length: %08X\n", data32->address_length);
647
648 if (0xFF != data32->resource_source.index) {
649 dbg(" Resource Source Index: %X\n", data32->resource_source.index);
650 /* dbg(" Resource Source: %s\n", data32->resource_source.string_ptr); */
651 }
652
653 pciehprm_add_resource(aprh, data32->min_address_range, data32->address_length);
654 }
655
656 static acpi_status acpi_parse_crs(
657 struct acpi_bridge *ab,
658 struct acpi_resource *crsbuf
659 )
660 {
661 acpi_status status = AE_OK;
662 struct acpi_resource *resource = crsbuf;
663 u8 count = 0;
664 u8 done = 0;
665
666 while (!done) {
667 dbg("acpi_pciehprm: PCI bus 0x%x Resource structure %x.\n", ab->bus, count++);
668 switch (resource->id) {
669 case ACPI_RSTYPE_IRQ:
670 dbg("Irq -------- Resource\n");
671 break;
672 case ACPI_RSTYPE_DMA:
673 dbg("DMA -------- Resource\n");
674 break;
675 case ACPI_RSTYPE_START_DPF:
676 dbg("Start DPF -------- Resource\n");
677 break;
678 case ACPI_RSTYPE_END_DPF:
679 dbg("End DPF -------- Resource\n");
680 break;
681 case ACPI_RSTYPE_IO:
682 acpi_parse_io (ab, &resource->data);
683 break;
684 case ACPI_RSTYPE_FIXED_IO:
685 acpi_parse_fixed_io (ab, &resource->data);
686 break;
687 case ACPI_RSTYPE_VENDOR:
688 dbg("Vendor -------- Resource\n");
689 break;
690 case ACPI_RSTYPE_END_TAG:
691 dbg("End_tag -------- Resource\n");
692 done = 1;
693 break;
694 case ACPI_RSTYPE_MEM24:
695 dbg("Mem24 -------- Resource\n");
696 break;
697 case ACPI_RSTYPE_MEM32:
698 dbg("Mem32 -------- Resource\n");
699 break;
700 case ACPI_RSTYPE_FIXED_MEM32:
701 dbg("Fixed Mem32 -------- Resource\n");
702 break;
703 case ACPI_RSTYPE_ADDRESS16:
704 acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS16);
705 break;
706 case ACPI_RSTYPE_ADDRESS32:
707 acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS32);
708 break;
709 case ACPI_RSTYPE_ADDRESS64:
710 info("Address64 -------- Resource unparsed\n");
711 break;
712 case ACPI_RSTYPE_EXT_IRQ:
713 dbg("Ext Irq -------- Resource\n");
714 break;
715 default:
716 dbg("Invalid -------- resource type 0x%x\n", resource->id);
717 break;
718 }
719
720 resource = (struct acpi_resource *) ((char *)resource + resource->length);
721 }
722
723 return status;
724 }
725
726 static acpi_status acpi_get_crs( struct acpi_bridge *ab)
727 {
728 acpi_status status;
729 struct acpi_resource *crsbuf;
730
731 status = acpi_evaluate_crs(ab->handle, &crsbuf);
732 if (ACPI_SUCCESS(status)) {
733 status = acpi_parse_crs(ab, crsbuf);
734 kfree(crsbuf);
735
736 pciehp_resource_sort_and_combine(&ab->bus_head);
737 pciehp_resource_sort_and_combine(&ab->io_head);
738 pciehp_resource_sort_and_combine(&ab->mem_head);
739 pciehp_resource_sort_and_combine(&ab->p_mem_head);
740
741 pciehprm_add_resources (&ab->tbus_head, ab->bus_head);
742 pciehprm_add_resources (&ab->tio_head, ab->io_head);
743 pciehprm_add_resources (&ab->tmem_head, ab->mem_head);
744 pciehprm_add_resources (&ab->tp_mem_head, ab->p_mem_head);
745 }
746
747 return status;
748 }
749
750 /* find acpi_bridge downword from ab. */
751 static struct acpi_bridge *
752 find_acpi_bridge_by_bus(
753 struct acpi_bridge *ab,
754 int seg,
755 int bus /* pdev->subordinate->number */
756 )
757 {
758 struct acpi_bridge *lab = NULL;
759
760 if (!ab)
761 return NULL;
762
763 if ((ab->bus == bus) && (ab->seg == seg))
764 return ab;
765
766 if (ab->child)
767 lab = find_acpi_bridge_by_bus(ab->child, seg, bus);
768
769 if (!lab)
770 if (ab->next)
771 lab = find_acpi_bridge_by_bus(ab->next, seg, bus);
772
773 return lab;
774 }
775
776 /*
777 * Build a device tree of ACPI PCI Bridges
778 */
779 static void pciehprm_acpi_register_a_bridge (
780 struct acpi_bridge **head,
781 struct acpi_bridge *pab, /* parent bridge to which child bridge is added */
782 struct acpi_bridge *cab /* child bridge to add */
783 )
784 {
785 struct acpi_bridge *lpab;
786 struct acpi_bridge *lcab;
787
788 lpab = find_acpi_bridge_by_bus(*head, pab->seg, pab->bus);
789 if (!lpab) {
790 if (!(pab->type & BRIDGE_TYPE_HOST))
791 warn("PCI parent bridge s:b(%x:%x) not in list.\n", pab->seg, pab->bus);
792 pab->next = *head;
793 *head = pab;
794 lpab = pab;
795 }
796
797 if ((cab->type & BRIDGE_TYPE_HOST) && (pab == cab))
798 return;
799
800 lcab = find_acpi_bridge_by_bus(*head, cab->seg, cab->bus);
801 if (lcab) {
802 if ((pab->bus != lcab->parent->bus) || (lcab->bus != cab->bus))
803 err("PCI child bridge s:b(%x:%x) in list with diff parent.\n", cab->seg, cab->bus);
804 return;
805 } else
806 lcab = cab;
807
808 lcab->parent = lpab;
809 lcab->next = lpab->child;
810 lpab->child = lcab;
811 }
812
813 static acpi_status pciehprm_acpi_build_php_slots_callback(
814 acpi_handle handle,
815 u32 Level,
816 void *context,
817 void **retval
818 )
819 {
820 ulong bus_num;
821 ulong seg_num;
822 ulong sun, adr;
823 ulong padr = 0;
824 acpi_handle phandle = NULL;
825 struct acpi_bridge *pab = (struct acpi_bridge *)context;
826 struct acpi_bridge *lab;
827 acpi_status status;
828 u8 *path_name = acpi_path_name(handle);
829
830 /* get _SUN */
831 status = acpi_evaluate_integer(handle, METHOD_NAME__SUN, NULL, &sun);
832 switch(status) {
833 case AE_NOT_FOUND:
834 return AE_OK;
835 default:
836 if (ACPI_FAILURE(status)) {
837 err("acpi_pciehprm:%s _SUN fail=0x%x\n", path_name, status);
838 return status;
839 }
840 }
841
842 /* get _ADR. _ADR must exist if _SUN exists */
843 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
844 if (ACPI_FAILURE(status)) {
845 err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status);
846 return status;
847 }
848
849 dbg("acpi_pciehprm:%s sun=0x%08x adr=0x%08x\n", path_name, (u32)sun, (u32)adr);
850
851 status = acpi_get_parent(handle, &phandle);
852 if (ACPI_FAILURE(status)) {
853 err("acpi_pciehprm:%s get_parent fail=0x%x\n", path_name, status);
854 return (status);
855 }
856
857 bus_num = pab->bus;
858 seg_num = pab->seg;
859
860 if (pab->bus == bus_num) {
861 lab = pab;
862 } else {
863 dbg("WARN: pab is not parent\n");
864 lab = find_acpi_bridge_by_bus(pab, seg_num, bus_num);
865 if (!lab) {
866 dbg("acpi_pciehprm: alloc new P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
867 lab = (struct acpi_bridge *)kmalloc(sizeof(struct acpi_bridge), GFP_KERNEL);
868 if (!lab) {
869 err("acpi_pciehprm: alloc for ab fail\n");
870 return AE_NO_MEMORY;
871 }
872 memset(lab, 0, sizeof(struct acpi_bridge));
873
874 lab->handle = phandle;
875 lab->pbus = pab->bus;
876 lab->pdevice = (int)(padr >> 16) & 0xffff;
877 lab->pfunction = (int)(padr & 0xffff);
878 lab->bus = (int)bus_num;
879 lab->scanned = 0;
880 lab->type = BRIDGE_TYPE_P2P;
881
882 pciehprm_acpi_register_a_bridge (&acpi_bridges_head, pab, lab);
883 } else
884 dbg("acpi_pciehprm: found P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
885 }
886
887 acpi_add_slot_to_php_slots(lab, (int)bus_num, handle, (u32)adr, (u32)sun);
888
889 return (status);
890 }
891
892 static int pciehprm_acpi_build_php_slots(
893 struct acpi_bridge *ab,
894 u32 depth
895 )
896 {
897 acpi_status status;
898 u8 *path_name = acpi_path_name(ab->handle);
899
900 /* Walk down this pci bridge to get _SUNs if any behind P2P */
901 status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
902 ab->handle,
903 depth,
904 pciehprm_acpi_build_php_slots_callback,
905 ab,
906 NULL );
907 if (ACPI_FAILURE(status)) {
908 dbg("acpi_pciehprm:%s walk for _SUN on pci bridge seg:bus(%x:%x) fail=0x%x\n", path_name, ab->seg, ab->bus, status);
909 return -1;
910 }
911
912 return 0;
913 }
914
915 static void build_a_bridge(
916 struct acpi_bridge *pab,
917 struct acpi_bridge *ab
918 )
919 {
920 u8 *path_name = acpi_path_name(ab->handle);
921
922 pciehprm_acpi_register_a_bridge (&acpi_bridges_head, pab, ab);
923
924 switch (ab->type) {
925 case BRIDGE_TYPE_HOST:
926 dbg("acpi_pciehprm: Registered PCI HOST Bridge(%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
927 ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
928 break;
929 case BRIDGE_TYPE_P2P:
930 dbg("acpi_pciehprm: Registered PCI P2P Bridge(%02x-%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
931 ab->pbus, ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
932 break;
933 };
934
935 /* build any immediate PHP slots under this pci bridge */
936 pciehprm_acpi_build_php_slots(ab, 1);
937 }
938
939 static struct acpi_bridge * add_p2p_bridge(
940 acpi_handle handle,
941 struct acpi_bridge *pab, /* parent */
942 ulong adr
943 )
944 {
945 struct acpi_bridge *ab;
946 struct pci_dev *pdev;
947 ulong devnum, funcnum;
948 u8 *path_name = acpi_path_name(handle);
949
950 ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
951 if (!ab) {
952 err("acpi_pciehprm: alloc for ab fail\n");
953 return NULL;
954 }
955 memset(ab, 0, sizeof(struct acpi_bridge));
956
957 devnum = (adr >> 16) & 0xffff;
958 funcnum = adr & 0xffff;
959
960 pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
961 if (!pdev || !pdev->subordinate) {
962 err("acpi_pciehprm:%s is not a P2P Bridge\n", path_name);
963 kfree(ab);
964 return NULL;
965 }
966
967 ab->handle = handle;
968 ab->seg = pab->seg;
969 ab->pbus = pab->bus; /* or pdev->bus->number */
970 ab->pdevice = devnum; /* or PCI_SLOT(pdev->devfn) */
971 ab->pfunction = funcnum; /* or PCI_FUNC(pdev->devfn) */
972 ab->bus = pdev->subordinate->number;
973 ab->scanned = 0;
974 ab->type = BRIDGE_TYPE_P2P;
975
976 dbg("acpi_pciehprm: P2P(%x-%x) on pci=b:d:f(%x:%x:%x) acpi=b:d:f(%x:%x:%x) [%s]\n",
977 pab->bus, ab->bus, pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
978 pab->bus, (u32)devnum, (u32)funcnum, path_name);
979
980 build_a_bridge(pab, ab);
981
982 return ab;
983 }
984
985 static acpi_status scan_p2p_bridge(
986 acpi_handle handle,
987 u32 Level,
988 void *context,
989 void **retval
990 )
991 {
992 struct acpi_bridge *pab = (struct acpi_bridge *)context;
993 struct acpi_bridge *ab;
994 acpi_status status;
995 ulong adr = 0;
996 u8 *path_name = acpi_path_name(handle);
997 ulong devnum, funcnum;
998 struct pci_dev *pdev;
999
1000 /* get device, function */
1001 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
1002 if (ACPI_FAILURE(status)) {
1003 if (status != AE_NOT_FOUND)
1004 err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status);
1005 return AE_OK;
1006 }
1007
1008 devnum = (adr >> 16) & 0xffff;
1009 funcnum = adr & 0xffff;
1010
1011 pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
1012 if (!pdev)
1013 return AE_OK;
1014 if (!pdev->subordinate)
1015 return AE_OK;
1016
1017 ab = add_p2p_bridge(handle, pab, adr);
1018 if (ab) {
1019 status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
1020 handle,
1021 (u32)1,
1022 scan_p2p_bridge,
1023 ab,
1024 NULL);
1025 if (ACPI_FAILURE(status))
1026 dbg("acpi_pciehprm:%s find_p2p fail=0x%x\n", path_name, status);
1027 }
1028
1029 return AE_OK;
1030 }
1031
1032 static struct acpi_bridge * add_host_bridge(
1033 acpi_handle handle,
1034 ulong segnum,
1035 ulong busnum
1036 )
1037 {
1038 ulong adr = 0;
1039 acpi_status status;
1040 struct acpi_bridge *ab;
1041 u8 *path_name = acpi_path_name(handle);
1042
1043 /* get device, function: host br adr is always 0000 though. */
1044 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
1045 if (ACPI_FAILURE(status)) {
1046 err("acpi_pciehprm:%s _ADR fail=0x%x\n", path_name, status);
1047 return NULL;
1048 }
1049 dbg("acpi_pciehprm: ROOT PCI seg(0x%x)bus(0x%x)dev(0x%x)func(0x%x) [%s]\n", (u32)segnum,
1050 (u32)busnum, (u32)(adr >> 16) & 0xffff, (u32)adr & 0xffff, path_name);
1051
1052 ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
1053 if (!ab) {
1054 err("acpi_pciehprm: alloc for ab fail\n");
1055 return NULL;
1056 }
1057 memset(ab, 0, sizeof(struct acpi_bridge));
1058
1059 ab->handle = handle;
1060 ab->seg = (int)segnum;
1061 ab->bus = ab->pbus = (int)busnum;
1062 ab->pdevice = (int)(adr >> 16) & 0xffff;
1063 ab->pfunction = (int)(adr & 0xffff);
1064 ab->scanned = 0;
1065 ab->type = BRIDGE_TYPE_HOST;
1066
1067 /* get root pci bridge's current resources */
1068 status = acpi_get_crs(ab);
1069 if (ACPI_FAILURE(status)) {
1070 err("acpi_pciehprm:%s evaluate _CRS fail=0x%x\n", path_name, status);
1071 kfree(ab);
1072 return NULL;
1073 }
1074
1075 status = pci_osc_control_set (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
1076 if (ACPI_FAILURE(status)) {
1077 err("%s: status %x\n", __FUNCTION__, status);
1078 osc_run_status = (status == AE_NOT_FOUND) ? OSC_NOT_EXIST : OSC_RUN_FAILED;
1079 } else {
1080 osc_run_status = NC_RUN_SUCCESS;
1081 }
1082 dbg("%s: osc_run_status %x\n", __FUNCTION__, osc_run_status);
1083
1084 build_a_bridge(ab, ab);
1085
1086 return ab;
1087 }
1088
1089 static acpi_status acpi_scan_from_root_pci_callback (
1090 acpi_handle handle,
1091 u32 Level,
1092 void *context,
1093 void **retval
1094 )
1095 {
1096 ulong segnum = 0;
1097 ulong busnum = 0;
1098 acpi_status status;
1099 struct acpi_bridge *ab;
1100 u8 *path_name = acpi_path_name(handle);
1101
1102 /* get bus number of this pci root bridge */
1103 status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segnum);
1104 if (ACPI_FAILURE(status)) {
1105 if (status != AE_NOT_FOUND) {
1106 err("acpi_pciehprm:%s evaluate _SEG fail=0x%x\n", path_name, status);
1107 return status;
1108 }
1109 segnum = 0;
1110 }
1111
1112 /* get bus number of this pci root bridge */
1113 status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &busnum);
1114 if (ACPI_FAILURE(status)) {
1115 err("acpi_pciehprm:%s evaluate _BBN fail=0x%x\n", path_name, status);
1116 return (status);
1117 }
1118
1119 ab = add_host_bridge(handle, segnum, busnum);
1120 if (ab) {
1121 status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
1122 handle,
1123 1,
1124 scan_p2p_bridge,
1125 ab,
1126 NULL);
1127 if (ACPI_FAILURE(status))
1128 dbg("acpi_pciehprm:%s find_p2p fail=0x%x\n", path_name, status);
1129 }
1130
1131 return AE_OK;
1132 }
1133
1134 static int pciehprm_acpi_scan_pci (void)
1135 {
1136 acpi_status status;
1137
1138 /*
1139 * TBD: traverse LDM device tree with the help of
1140 * unified ACPI augmented for php device population.
1141 */
1142 status = acpi_get_devices ( PCI_ROOT_HID_STRING,
1143 acpi_scan_from_root_pci_callback,
1144 NULL,
1145 NULL );
1146 if (ACPI_FAILURE(status)) {
1147 err("acpi_pciehprm:get_device PCI ROOT HID fail=0x%x\n", status);
1148 return -1;
1149 }
1150
1151 return 0;
1152 }
1153
1154 int pciehprm_init(enum php_ctlr_type ctlr_type)
1155 {
1156 int rc;
1157
1158 if (ctlr_type != PCI)
1159 return -ENODEV;
1160
1161 dbg("pciehprm ACPI init <enter>\n");
1162 acpi_bridges_head = NULL;
1163
1164 /* construct PCI bus:device tree of acpi_handles */
1165 rc = pciehprm_acpi_scan_pci();
1166 if (rc)
1167 return rc;
1168
1169 if ((oshp_run_status != NC_RUN_SUCCESS) && (osc_run_status != NC_RUN_SUCCESS)) {
1170 err("Fails to gain control of native hot-plug\n");
1171 rc = -ENODEV;
1172 }
1173
1174 dbg("pciehprm ACPI init %s\n", (rc)?"fail":"success");
1175 return rc;
1176 }
1177
1178 static void free_a_slot(struct acpi_php_slot *aps)
1179 {
1180 dbg(" free a php func of slot(0x%02x) on PCI b:d:f=0x%02x:%02x:%02x\n", aps->sun, aps->bus, aps->dev, aps->fun);
1181
1182 free_pci_resource (aps->io_head);
1183 free_pci_resource (aps->bus_head);
1184 free_pci_resource (aps->mem_head);
1185 free_pci_resource (aps->p_mem_head);
1186
1187 kfree(aps);
1188 }
1189
1190 static void free_a_bridge( struct acpi_bridge *ab)
1191 {
1192 struct acpi_php_slot *aps, *next;
1193
1194 switch (ab->type) {
1195 case BRIDGE_TYPE_HOST:
1196 dbg("Free ACPI PCI HOST Bridge(%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
1197 ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
1198 break;
1199 case BRIDGE_TYPE_P2P:
1200 dbg("Free ACPI PCI P2P Bridge(%x-%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
1201 ab->pbus, ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
1202 break;
1203 };
1204
1205 /* free slots first */
1206 for (aps = ab->slots; aps; aps = next) {
1207 next = aps->next;
1208 free_a_slot(aps);
1209 }
1210
1211 free_pci_resource (ab->io_head);
1212 free_pci_resource (ab->tio_head);
1213 free_pci_resource (ab->bus_head);
1214 free_pci_resource (ab->tbus_head);
1215 free_pci_resource (ab->mem_head);
1216 free_pci_resource (ab->tmem_head);
1217 free_pci_resource (ab->p_mem_head);
1218 free_pci_resource (ab->tp_mem_head);
1219
1220 kfree(ab);
1221 }
1222
1223 static void pciehprm_free_bridges ( struct acpi_bridge *ab)
1224 {
1225 if (!ab)
1226 return;
1227
1228 if (ab->child)
1229 pciehprm_free_bridges (ab->child);
1230
1231 if (ab->next)
1232 pciehprm_free_bridges (ab->next);
1233
1234 free_a_bridge(ab);
1235 }
1236
1237 void pciehprm_cleanup(void)
1238 {
1239 pciehprm_free_bridges (acpi_bridges_head);
1240 }
1241
1242 static int get_number_of_slots (
1243 struct acpi_bridge *ab,
1244 int selfonly
1245 )
1246 {
1247 struct acpi_php_slot *aps;
1248 int prev_slot = -1;
1249 int slot_num = 0;
1250
1251 for ( aps = ab->slots; aps; aps = aps->next)
1252 if (aps->dev != prev_slot) {
1253 prev_slot = aps->dev;
1254 slot_num++;
1255 }
1256
1257 if (ab->child)
1258 slot_num += get_number_of_slots (ab->child, 0);
1259
1260 if (selfonly)
1261 return slot_num;
1262
1263 if (ab->next)
1264 slot_num += get_number_of_slots (ab->next, 0);
1265
1266 return slot_num;
1267 }
1268
1269 static int print_acpi_resources (struct acpi_bridge *ab)
1270 {
1271 struct acpi_php_slot *aps;
1272 int i;
1273
1274 switch (ab->type) {
1275 case BRIDGE_TYPE_HOST:
1276 dbg("PCI HOST Bridge (%x) [%s]\n", ab->bus, acpi_path_name(ab->handle));
1277 break;
1278 case BRIDGE_TYPE_P2P:
1279 dbg("PCI P2P Bridge (%x-%x) [%s]\n", ab->pbus, ab->bus, acpi_path_name(ab->handle));
1280 break;
1281 };
1282
1283 print_pci_resources (ab);
1284
1285 for ( i = -1, aps = ab->slots; aps; aps = aps->next) {
1286 if (aps->dev == i)
1287 continue;
1288 dbg(" Slot sun(%x) s:b:d:f(%02x:%02x:%02x:%02x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun);
1289 print_slot_resources(aps);
1290 i = aps->dev;
1291 }
1292
1293 if (ab->child)
1294 print_acpi_resources (ab->child);
1295
1296 if (ab->next)
1297 print_acpi_resources (ab->next);
1298
1299 return 0;
1300 }
1301
1302 int pciehprm_print_pirt(void)
1303 {
1304 dbg("PCIEHPRM ACPI Slots\n");
1305 if (acpi_bridges_head)
1306 print_acpi_resources (acpi_bridges_head);
1307
1308 return 0;
1309 }
1310
1311 static struct acpi_php_slot * get_acpi_slot (
1312 struct acpi_bridge *ab,
1313 u32 sun
1314 )
1315 {
1316 struct acpi_php_slot *aps = NULL;
1317
1318 for ( aps = ab->slots; aps; aps = aps->next)
1319 if (aps->sun == sun)
1320 return aps;
1321
1322 if (!aps && ab->child) {
1323 aps = (struct acpi_php_slot *)get_acpi_slot (ab->child, sun);
1324 if (aps)
1325 return aps;
1326 }
1327
1328 if (!aps && ab->next) {
1329 aps = (struct acpi_php_slot *)get_acpi_slot (ab->next, sun);
1330 if (aps)
1331 return aps;
1332 }
1333
1334 return aps;
1335
1336 }
1337
1338 #if 0
1339 void * pciehprm_get_slot(struct slot *slot)
1340 {
1341 struct acpi_bridge *ab = acpi_bridges_head;
1342 struct acpi_php_slot *aps = get_acpi_slot (ab, slot->number);
1343
1344 aps->slot = slot;
1345
1346 dbg("Got acpi slot sun(%x): s:b:d:f(%x:%x:%x:%x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun);
1347
1348 return (void *)aps;
1349 }
1350 #endif
1351
1352 static void pciehprm_dump_func_res( struct pci_func *fun)
1353 {
1354 struct pci_func *func = fun;
1355
1356 if (func->bus_head) {
1357 dbg(": BUS Resources:\n");
1358 print_pci_resource (func->bus_head);
1359 }
1360 if (func->io_head) {
1361 dbg(": IO Resources:\n");
1362 print_pci_resource (func->io_head);
1363 }
1364 if (func->mem_head) {
1365 dbg(": MEM Resources:\n");
1366 print_pci_resource (func->mem_head);
1367 }
1368 if (func->p_mem_head) {
1369 dbg(": PMEM Resources:\n");
1370 print_pci_resource (func->p_mem_head);
1371 }
1372 }
1373
1374 static void pciehprm_dump_ctrl_res( struct controller *ctlr)
1375 {
1376 struct controller *ctrl = ctlr;
1377
1378 if (ctrl->bus_head) {
1379 dbg(": BUS Resources:\n");
1380 print_pci_resource (ctrl->bus_head);
1381 }
1382 if (ctrl->io_head) {
1383 dbg(": IO Resources:\n");
1384 print_pci_resource (ctrl->io_head);
1385 }
1386 if (ctrl->mem_head) {
1387 dbg(": MEM Resources:\n");
1388 print_pci_resource (ctrl->mem_head);
1389 }
1390 if (ctrl->p_mem_head) {
1391 dbg(": PMEM Resources:\n");
1392 print_pci_resource (ctrl->p_mem_head);
1393 }
1394 }
1395
1396 static int pciehprm_get_used_resources (
1397 struct controller *ctrl,
1398 struct pci_func *func
1399 )
1400 {
1401 return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
1402 }
1403
1404 static int configure_existing_function(
1405 struct controller *ctrl,
1406 struct pci_func *func
1407 )
1408 {
1409 int rc;
1410
1411 /* see how much resources the func has used. */
1412 rc = pciehprm_get_used_resources (ctrl, func);
1413
1414 if (!rc) {
1415 /* subtract the resources used by the func from ctrl resources */
1416 rc = pciehprm_delete_resources (&ctrl->bus_head, func->bus_head);
1417 rc |= pciehprm_delete_resources (&ctrl->io_head, func->io_head);
1418 rc |= pciehprm_delete_resources (&ctrl->mem_head, func->mem_head);
1419 rc |= pciehprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
1420 if (rc)
1421 warn("aCEF: cannot del used resources\n");
1422 } else
1423 err("aCEF: cannot get used resources\n");
1424
1425 return rc;
1426 }
1427
1428 static int bind_pci_resources_to_slots ( struct controller *ctrl)
1429 {
1430 struct pci_func *func, new_func;
1431 int busn = ctrl->slot_bus;
1432 int devn, funn;
1433 u32 vid;
1434
1435 for (devn = 0; devn < 32; devn++) {
1436 for (funn = 0; funn < 8; funn++) {
1437 /*
1438 if (devn == ctrl->device && funn == ctrl->function)
1439 continue;
1440 */
1441 /* find out if this entry is for an occupied slot */
1442 vid = 0xFFFFFFFF;
1443 pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
1444
1445 if (vid != 0xFFFFFFFF) {
1446 dbg("%s: vid = %x\n", __FUNCTION__, vid);
1447 func = pciehp_slot_find(busn, devn, funn);
1448 if (!func) {
1449 memset(&new_func, 0, sizeof(struct pci_func));
1450 new_func.bus = busn;
1451 new_func.device = devn;
1452 new_func.function = funn;
1453 new_func.is_a_board = 1;
1454 configure_existing_function(ctrl, &new_func);
1455 pciehprm_dump_func_res(&new_func);
1456 } else {
1457 configure_existing_function(ctrl, func);
1458 pciehprm_dump_func_res(func);
1459 }
1460 dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
1461 }
1462 }
1463 }
1464
1465 return 0;
1466 }
1467
1468 static int bind_pci_resources(
1469 struct controller *ctrl,
1470 struct acpi_bridge *ab
1471 )
1472 {
1473 int status = 0;
1474
1475 if (ab->bus_head) {
1476 dbg("bapr: BUS Resources add on PCI 0x%x\n", ab->bus);
1477 status = pciehprm_add_resources (&ctrl->bus_head, ab->bus_head);
1478 if (pciehprm_delete_resources (&ab->bus_head, ctrl->bus_head))
1479 warn("bapr: cannot sub BUS Resource on PCI 0x%x\n", ab->bus);
1480 if (status) {
1481 err("bapr: BUS Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1482 return status;
1483 }
1484 } else
1485 info("bapr: No BUS Resource on PCI 0x%x.\n", ab->bus);
1486
1487 if (ab->io_head) {
1488 dbg("bapr: IO Resources add on PCI 0x%x\n", ab->bus);
1489 status = pciehprm_add_resources (&ctrl->io_head, ab->io_head);
1490 if (pciehprm_delete_resources (&ab->io_head, ctrl->io_head))
1491 warn("bapr: cannot sub IO Resource on PCI 0x%x\n", ab->bus);
1492 if (status) {
1493 err("bapr: IO Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1494 return status;
1495 }
1496 } else
1497 info("bapr: No IO Resource on PCI 0x%x.\n", ab->bus);
1498
1499 if (ab->mem_head) {
1500 dbg("bapr: MEM Resources add on PCI 0x%x\n", ab->bus);
1501 status = pciehprm_add_resources (&ctrl->mem_head, ab->mem_head);
1502 if (pciehprm_delete_resources (&ab->mem_head, ctrl->mem_head))
1503 warn("bapr: cannot sub MEM Resource on PCI 0x%x\n", ab->bus);
1504 if (status) {
1505 err("bapr: MEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1506 return status;
1507 }
1508 } else
1509 info("bapr: No MEM Resource on PCI 0x%x.\n", ab->bus);
1510
1511 if (ab->p_mem_head) {
1512 dbg("bapr: PMEM Resources add on PCI 0x%x\n", ab->bus);
1513 status = pciehprm_add_resources (&ctrl->p_mem_head, ab->p_mem_head);
1514 if (pciehprm_delete_resources (&ab->p_mem_head, ctrl->p_mem_head))
1515 warn("bapr: cannot sub PMEM Resource on PCI 0x%x\n", ab->bus);
1516 if (status) {
1517 err("bapr: PMEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1518 return status;
1519 }
1520 } else
1521 info("bapr: No PMEM Resource on PCI 0x%x.\n", ab->bus);
1522
1523 return status;
1524 }
1525
1526 static int no_pci_resources( struct acpi_bridge *ab)
1527 {
1528 return !(ab->p_mem_head || ab->mem_head || ab->io_head || ab->bus_head);
1529 }
1530
1531 static int find_pci_bridge_resources (
1532 struct controller *ctrl,
1533 struct acpi_bridge *ab
1534 )
1535 {
1536 int rc = 0;
1537 struct pci_func func;
1538
1539 memset(&func, 0, sizeof(struct pci_func));
1540
1541 func.bus = ab->pbus;
1542 func.device = ab->pdevice;
1543 func.function = ab->pfunction;
1544 func.is_a_board = 1;
1545
1546 /* Get used resources for this PCI bridge */
1547 rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
1548
1549 ab->io_head = func.io_head;
1550 ab->mem_head = func.mem_head;
1551 ab->p_mem_head = func.p_mem_head;
1552 ab->bus_head = func.bus_head;
1553 if (ab->bus_head)
1554 pciehprm_delete_resource(&ab->bus_head, ctrl->pci_dev->subordinate->number, 1);
1555
1556 return rc;
1557 }
1558
1559 static int get_pci_resources_from_bridge(
1560 struct controller *ctrl,
1561 struct acpi_bridge *ab
1562 )
1563 {
1564 int rc = 0;
1565
1566 dbg("grfb: Get Resources for PCI 0x%x from actual PCI bridge 0x%x.\n", ctrl->bus, ab->bus);
1567
1568 rc = find_pci_bridge_resources (ctrl, ab);
1569
1570 pciehp_resource_sort_and_combine(&ab->bus_head);
1571 pciehp_resource_sort_and_combine(&ab->io_head);
1572 pciehp_resource_sort_and_combine(&ab->mem_head);
1573 pciehp_resource_sort_and_combine(&ab->p_mem_head);
1574
1575 pciehprm_add_resources (&ab->tbus_head, ab->bus_head);
1576 pciehprm_add_resources (&ab->tio_head, ab->io_head);
1577 pciehprm_add_resources (&ab->tmem_head, ab->mem_head);
1578 pciehprm_add_resources (&ab->tp_mem_head, ab->p_mem_head);
1579
1580 return rc;
1581 }
1582
1583 static int get_pci_resources(
1584 struct controller *ctrl,
1585 struct acpi_bridge *ab
1586 )
1587 {
1588 int rc = 0;
1589
1590 if (no_pci_resources(ab)) {
1591 dbg("spbr:PCI 0x%x has no resources. Get parent resources.\n", ab->bus);
1592 rc = get_pci_resources_from_bridge(ctrl, ab);
1593 }
1594
1595 return rc;
1596 }
1597
1598 /*
1599 * Get resources for this ctrl.
1600 * 1. get total resources from ACPI _CRS or bridge (this ctrl)
1601 * 2. find used resources of existing adapters
1602 * 3. subtract used resources from total resources
1603 */
1604 int pciehprm_find_available_resources( struct controller *ctrl)
1605 {
1606 int rc = 0;
1607 struct acpi_bridge *ab;
1608
1609 ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->pci_dev->subordinate->number);
1610 if (!ab) {
1611 err("pfar:cannot locate acpi bridge of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number);
1612 return -1;
1613 }
1614 if (no_pci_resources(ab)) {
1615 rc = get_pci_resources(ctrl, ab);
1616 if (rc) {
1617 err("pfar:cannot get pci resources of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number);
1618 return -1;
1619 }
1620 }
1621
1622 rc = bind_pci_resources(ctrl, ab);
1623 dbg("pfar:pre-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number);
1624 pciehprm_dump_ctrl_res(ctrl);
1625
1626 bind_pci_resources_to_slots (ctrl);
1627
1628 dbg("pfar:post-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number);
1629 pciehprm_dump_ctrl_res(ctrl);
1630
1631 return rc;
1632 }
1633
1634 int pciehprm_set_hpp(
1635 struct controller *ctrl,
1636 struct pci_func *func,
1637 u8 card_type
1638 )
1639 {
1640 struct acpi_bridge *ab;
1641 struct pci_bus lpci_bus, *pci_bus;
1642 int rc = 0;
1643 unsigned int devfn;
1644 u8 cls= 0x08; /* default cache line size */
1645 u8 lt = 0x40; /* default latency timer */
1646 u8 ep = 0;
1647 u8 es = 0;
1648
1649 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
1650 pci_bus = &lpci_bus;
1651 pci_bus->number = func->bus;
1652 devfn = PCI_DEVFN(func->device, func->function);
1653
1654 ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus);
1655
1656 if (ab) {
1657 if (ab->_hpp) {
1658 lt = (u8)ab->_hpp->latency_timer;
1659 cls = (u8)ab->_hpp->cache_line_size;
1660 ep = (u8)ab->_hpp->enable_perr;
1661 es = (u8)ab->_hpp->enable_serr;
1662 } else
1663 dbg("_hpp: no _hpp for B/D/F=%#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
1664 } else
1665 dbg("_hpp: no acpi bridge for B/D/F = %#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
1666
1667
1668 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
1669 /* set subordinate Latency Timer */
1670 rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, lt);
1671 }
1672
1673 /* set base Latency Timer */
1674 rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, lt);
1675 dbg(" set latency timer =0x%02x: %x\n", lt, rc);
1676
1677 rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, cls);
1678 dbg(" set cache_line_size=0x%02x: %x\n", cls, rc);
1679
1680 return rc;
1681 }
1682
1683 void pciehprm_enable_card(
1684 struct controller *ctrl,
1685 struct pci_func *func,
1686 u8 card_type)
1687 {
1688 u16 command, cmd, bcommand, bcmd;
1689 struct pci_bus lpci_bus, *pci_bus;
1690 struct acpi_bridge *ab;
1691 unsigned int devfn;
1692 int rc;
1693
1694 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
1695 pci_bus = &lpci_bus;
1696 pci_bus->number = func->bus;
1697 devfn = PCI_DEVFN(func->device, func->function);
1698
1699 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
1700
1701 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
1702 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
1703 }
1704
1705 cmd = command = command | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
1706 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
1707 bcmd = bcommand = bcommand | PCI_BRIDGE_CTL_NO_ISA;
1708
1709 ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus);
1710 if (ab) {
1711 if (ab->_hpp) {
1712 if (ab->_hpp->enable_perr) {
1713 command |= PCI_COMMAND_PARITY;
1714 bcommand |= PCI_BRIDGE_CTL_PARITY;
1715 } else {
1716 command &= ~PCI_COMMAND_PARITY;
1717 bcommand &= ~PCI_BRIDGE_CTL_PARITY;
1718 }
1719 if (ab->_hpp->enable_serr) {
1720 command |= PCI_COMMAND_SERR;
1721 bcommand |= PCI_BRIDGE_CTL_SERR;
1722 } else {
1723 command &= ~PCI_COMMAND_SERR;
1724 bcommand &= ~PCI_BRIDGE_CTL_SERR;
1725 }
1726 } else
1727 dbg("no _hpp for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
1728 } else
1729 dbg("no acpi bridge for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
1730
1731 if (command != cmd) {
1732 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
1733 }
1734 if ((card_type == PCI_HEADER_TYPE_BRIDGE) && (bcommand != bcmd)) {
1735 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
1736 }
1737 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree