projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] PCI Hotplug: new contact info
[linux-block.git] / drivers / pci / hotplug / shpchprm_acpi.c
CommitLineData
1da177e4
LT		 1/*
2 * SHPCHPRM 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 *
8cf4c195 23 * Send feedback to <kristen.c.accardi@intel.com>
1da177e4
LT		 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 <asm/uaccess.h>
36#include <asm/system.h>
37#ifdef CONFIG_IA64
38#include <asm/iosapic.h>
39#endif
40#include <acpi/acpi.h>
41#include <acpi/acpi_bus.h>
42#include <acpi/actypes.h>
43#include "shpchp.h"
44#include "shpchprm.h"
45
46#define PCI_MAX_BUS 0x100
47#define ACPI_STA_DEVICE_PRESENT 0x01
48
49#define METHOD_NAME__SUN "_SUN"
50#define METHOD_NAME__HPP "_HPP"
51#define METHOD_NAME_OSHP "OSHP"
52
53#define PHP_RES_BUS 0xA0
54#define PHP_RES_IO 0xA1
55#define PHP_RES_MEM 0xA2
56#define PHP_RES_PMEM 0xA3
57
58#define BRIDGE_TYPE_P2P 0x00
59#define BRIDGE_TYPE_HOST 0x01
60
61/* this should go to drivers/acpi/include/ */
62struct acpi__hpp {
63 u8 cache_line_size;
64 u8 latency_timer;
65 u8 enable_serr;
66 u8 enable_perr;
67};
68
69struct acpi_php_slot {
70 struct acpi_php_slot *next;
71 struct acpi_bridge *bridge;
72 acpi_handle handle;
73 int seg;
74 int bus;
75 int dev;
76 int fun;
77 u32 sun;
78 struct pci_resource *mem_head;
79 struct pci_resource *p_mem_head;
80 struct pci_resource *io_head;
81 struct pci_resource *bus_head;
82 void *slot_ops; /* _STA, _EJx, etc */
83 struct slot *slot;
84}; /* per func */
85
86struct acpi_bridge {
87 struct acpi_bridge *parent;
88 struct acpi_bridge *next;
89 struct acpi_bridge *child;
90 acpi_handle handle;
91 int seg;
92 int pbus; /* pdev->bus->number */
93 int pdevice; /* PCI_SLOT(pdev->devfn) */
94 int pfunction; /* PCI_DEVFN(pdev->devfn) */
95 int bus; /* pdev->subordinate->number */
96 struct acpi__hpp *_hpp;
97 struct acpi_php_slot *slots;
98 struct pci_resource *tmem_head; /* total from crs */
99 struct pci_resource *tp_mem_head; /* total from crs */
100 struct pci_resource *tio_head; /* total from crs */
101 struct pci_resource *tbus_head; /* total from crs */
102 struct pci_resource *mem_head; /* available */
103 struct pci_resource *p_mem_head; /* available */
104 struct pci_resource *io_head; /* available */
105 struct pci_resource *bus_head; /* available */
106 int scanned;
107 int type;
108};
109
110static struct acpi_bridge *acpi_bridges_head;
111
112static u8 * acpi_path_name( acpi_handle handle)
113{
114 acpi_status status;
115 static u8 path_name[ACPI_PATHNAME_MAX];
116 struct acpi_buffer ret_buf = { ACPI_PATHNAME_MAX, path_name };
117
118 memset(path_name, 0, sizeof (path_name));
119 status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
120
121 if (ACPI_FAILURE(status))
122 return NULL;
123 else
124 return path_name;
125}
126
127static void acpi_get__hpp ( struct acpi_bridge *ab);
128static void acpi_run_oshp ( struct acpi_bridge *ab);
129
130static int acpi_add_slot_to_php_slots(
131 struct acpi_bridge *ab,
132 int bus_num,
133 acpi_handle handle,
134 u32 adr,
135 u32 sun
136 )
137{
138 struct acpi_php_slot *aps;
139 static long samesun = -1;
140
141 aps = (struct acpi_php_slot *) kmalloc (sizeof(struct acpi_php_slot), GFP_KERNEL);
142 if (!aps) {
143 err ("acpi_shpchprm: alloc for aps fail\n");
144 return -1;
145 }
146 memset(aps, 0, sizeof(struct acpi_php_slot));
147
148 aps->handle = handle;
149 aps->bus = bus_num;
150 aps->dev = (adr >> 16) & 0xffff;
151 aps->fun = adr & 0xffff;
152 aps->sun = sun;
153
154 aps->next = ab->slots; /* cling to the bridge */
155 aps->bridge = ab;
156 ab->slots = aps;
157
158 ab->scanned += 1;
159 if (!ab->_hpp)
160 acpi_get__hpp(ab);
161
162 acpi_run_oshp(ab);
163
164 if (sun != samesun) {
165 info("acpi_shpchprm: Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n", aps->sun, ab->seg,
166 aps->bus, aps->dev, aps->fun);
167 samesun = sun;
168 }
169 return 0;
170}
171
172static void acpi_get__hpp ( struct acpi_bridge *ab)
173{
174 acpi_status status;
175 u8 nui[4];
176 struct acpi_buffer ret_buf = { 0, NULL};
177 union acpi_object *ext_obj, *package;
178 u8 *path_name = acpi_path_name(ab->handle);
179 int i, len = 0;
180
181 /* get _hpp */
182 status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
183 switch (status) {
184 case AE_BUFFER_OVERFLOW:
185 ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
186 if (!ret_buf.pointer) {
187 err ("acpi_shpchprm:%s alloc for _HPP fail\n", path_name);
188 return;
189 }
190 status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
191 if (ACPI_SUCCESS(status))
192 break;
193 default:
194 if (ACPI_FAILURE(status)) {
195 err("acpi_shpchprm:%s _HPP fail=0x%x\n", path_name, status);
196 return;
197 }
198 }
199
200 ext_obj = (union acpi_object *) ret_buf.pointer;
201 if (ext_obj->type != ACPI_TYPE_PACKAGE) {
202 err ("acpi_shpchprm:%s _HPP obj not a package\n", path_name);
203 goto free_and_return;
204 }
205
206 len = ext_obj->package.count;
207 package = (union acpi_object *) ret_buf.pointer;
208 for ( i = 0; (i < len) || (i < 4); i++) {
209 ext_obj = (union acpi_object *) &package->package.elements[i];
210 switch (ext_obj->type) {
211 case ACPI_TYPE_INTEGER:
212 nui[i] = (u8)ext_obj->integer.value;
213 break;
214 default:
215 err ("acpi_shpchprm:%s _HPP obj type incorrect\n", path_name);
216 goto free_and_return;
217 }
218 }
219
220 ab->_hpp = kmalloc (sizeof (struct acpi__hpp), GFP_KERNEL);
221 if (!ab->_hpp) {
222 err ("acpi_shpchprm:%s alloc for _HPP failed\n", path_name);
223 goto free_and_return;
224 }
225 memset(ab->_hpp, 0, sizeof(struct acpi__hpp));
226
227 ab->_hpp->cache_line_size = nui[0];
228 ab->_hpp->latency_timer = nui[1];
229 ab->_hpp->enable_serr = nui[2];
230 ab->_hpp->enable_perr = nui[3];
231
232 dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
233 dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
234 dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
235 dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
236
237free_and_return:
238 kfree(ret_buf.pointer);
239}
240
241static void acpi_run_oshp ( struct acpi_bridge *ab)
242{
243 acpi_status status;
244 u8 *path_name = acpi_path_name(ab->handle);
245
246 /* run OSHP */
247 status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, NULL);
248 if (ACPI_FAILURE(status)) {
249 err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status);
250 } else
251 dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status);
252 return;
253}
254
255static acpi_status acpi_evaluate_crs(
256 acpi_handle handle,
257 struct acpi_resource **retbuf
258 )
259{
260 acpi_status status;
261 struct acpi_buffer crsbuf;
262 u8 *path_name = acpi_path_name(handle);
263
264 crsbuf.length = 0;
265 crsbuf.pointer = NULL;
266
267 status = acpi_get_current_resources (handle, &crsbuf);
268
269 switch (status) {
270 case AE_BUFFER_OVERFLOW:
271 break; /* found */
272 case AE_NOT_FOUND:
273 dbg("acpi_shpchprm:%s _CRS not found\n", path_name);
274 return status;
275 default:
276 err ("acpi_shpchprm:%s _CRS fail=0x%x\n", path_name, status);
277 return status;
278 }
279
280 crsbuf.pointer = kmalloc (crsbuf.length, GFP_KERNEL);
281 if (!crsbuf.pointer) {
282 err ("acpi_shpchprm: alloc %ld bytes for %s _CRS fail\n", (ulong)crsbuf.length, path_name);
283 return AE_NO_MEMORY;
284 }
285
286 status = acpi_get_current_resources (handle, &crsbuf);
287 if (ACPI_FAILURE(status)) {
288 err("acpi_shpchprm: %s _CRS fail=0x%x.\n", path_name, status);
289 kfree(crsbuf.pointer);
290 return status;
291 }
292
293 *retbuf = crsbuf.pointer;
294
295 return status;
296}
297
298static void free_pci_resource ( struct pci_resource *aprh)
299{
300 struct pci_resource *res, *next;
301
302 for (res = aprh; res; res = next) {
303 next = res->next;
304 kfree(res);
305 }
306}
307
308static void print_pci_resource ( struct pci_resource *aprh)
309{
310 struct pci_resource *res;
311
312 for (res = aprh; res; res = res->next)
313 dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
314}
315
316static void print_slot_resources( struct acpi_php_slot *aps)
317{
318 if (aps->bus_head) {
319 dbg(" BUS Resources:\n");
320 print_pci_resource (aps->bus_head);
321 }
322
323 if (aps->io_head) {
324 dbg(" IO Resources:\n");
325 print_pci_resource (aps->io_head);
326 }
327
328 if (aps->mem_head) {
329 dbg(" MEM Resources:\n");
330 print_pci_resource (aps->mem_head);
331 }
332
333 if (aps->p_mem_head) {
334 dbg(" PMEM Resources:\n");
335 print_pci_resource (aps->p_mem_head);
336 }
337}
338
339static void print_pci_resources( struct acpi_bridge *ab)
340{
341 if (ab->tbus_head) {
342 dbg(" Total BUS Resources:\n");
343 print_pci_resource (ab->tbus_head);
344 }
345 if (ab->bus_head) {
346 dbg(" BUS Resources:\n");
347 print_pci_resource (ab->bus_head);
348 }
349
350 if (ab->tio_head) {
351 dbg(" Total IO Resources:\n");
352 print_pci_resource (ab->tio_head);
353 }
354 if (ab->io_head) {
355 dbg(" IO Resources:\n");
356 print_pci_resource (ab->io_head);
357 }
358
359 if (ab->tmem_head) {
360 dbg(" Total MEM Resources:\n");
361 print_pci_resource (ab->tmem_head);
362 }
363 if (ab->mem_head) {
364 dbg(" MEM Resources:\n");
365 print_pci_resource (ab->mem_head);
366 }
367
368 if (ab->tp_mem_head) {
369 dbg(" Total PMEM Resources:\n");
370 print_pci_resource (ab->tp_mem_head);
371 }
372 if (ab->p_mem_head) {
373 dbg(" PMEM Resources:\n");
374 print_pci_resource (ab->p_mem_head);
375 }
376 if (ab->_hpp) {
377 dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
378 dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
379 dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
380 dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
381 }
382}
383
384static int shpchprm_delete_resource(
385 struct pci_resource **aprh,
386 ulong base,
387 ulong size)
388{
389 struct pci_resource *res;
390 struct pci_resource *prevnode;
391 struct pci_resource *split_node;
392 ulong tbase;
393
394 shpchp_resource_sort_and_combine(aprh);
395
396 for (res = *aprh; res; res = res->next) {
397 if (res->base > base)
398 continue;
399
400 if ((res->base + res->length) < (base + size))
401 continue;
402
403 if (res->base < base) {
404 tbase = base;
405
406 if ((res->length - (tbase - res->base)) < size)
407 continue;
408
409 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
410 if (!split_node)
411 return -ENOMEM;
412
413 split_node->base = res->base;
414 split_node->length = tbase - res->base;
415 res->base = tbase;
416 res->length -= split_node->length;
417
418 split_node->next = res->next;
419 res->next = split_node;
420 }
421
422 if (res->length >= size) {
423 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
424 if (!split_node)
425 return -ENOMEM;
426
427 split_node->base = res->base + size;
428 split_node->length = res->length - size;
429 res->length = size;
430
431 split_node->next = res->next;
432 res->next = split_node;
433 }
434
435 if (*aprh == res) {
436 *aprh = res->next;
437 } else {
438 prevnode = *aprh;
439 while (prevnode->next != res)
440 prevnode = prevnode->next;
441
442 prevnode->next = res->next;
443 }
444 res->next = NULL;
445 kfree(res);
446 break;
447 }
448
449 return 0;
450}
451
452static int shpchprm_delete_resources(
453 struct pci_resource **aprh,
454 struct pci_resource *this
455 )
456{
457 struct pci_resource *res;
458
459 for (res = this; res; res = res->next)
460 shpchprm_delete_resource(aprh, res->base, res->length);
461
462 return 0;
463}
464
465static int shpchprm_add_resource(
466 struct pci_resource **aprh,
467 ulong base,
468 ulong size)
469{
470 struct pci_resource *res;
471
472 for (res = *aprh; res; res = res->next) {
473 if ((res->base + res->length) == base) {
474 res->length += size;
475 size = 0L;
476 break;
477 }
478 if (res->next == *aprh)
479 break;
480 }
481
482 if (size) {
483 res = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
484 if (!res) {
485 err ("acpi_shpchprm: alloc for res fail\n");
486 return -ENOMEM;
487 }
488 memset(res, 0, sizeof (struct pci_resource));
489
490 res->base = base;
491 res->length = size;
492 res->next = *aprh;
493 *aprh = res;
494 }
495
496 return 0;
497}
498
499static int shpchprm_add_resources(
500 struct pci_resource **aprh,
501 struct pci_resource *this
502 )
503{
504 struct pci_resource *res;
505 int rc = 0;
506
507 for (res = this; res && !rc; res = res->next)
508 rc = shpchprm_add_resource(aprh, res->base, res->length);
509
510 return rc;
511}
512
513static void acpi_parse_io (
514 struct acpi_bridge *ab,
515 union acpi_resource_data *data
516 )
517{
518 struct acpi_resource_io *dataio;
519 dataio = (struct acpi_resource_io *) data;
520
521 dbg("Io Resource\n");
522 dbg(" %d bit decode\n", ACPI_DECODE_16 == dataio->io_decode ? 16:10);
523 dbg(" Range minimum base: %08X\n", dataio->min_base_address);
524 dbg(" Range maximum base: %08X\n", dataio->max_base_address);
525 dbg(" Alignment: %08X\n", dataio->alignment);
526 dbg(" Range Length: %08X\n", dataio->range_length);
527}
528
529static void acpi_parse_fixed_io (
530 struct acpi_bridge *ab,
531 union acpi_resource_data *data
532 )
533{
534 struct acpi_resource_fixed_io *datafio;
535 datafio = (struct acpi_resource_fixed_io *) data;
536
537 dbg("Fixed Io Resource\n");
538 dbg(" Range base address: %08X", datafio->base_address);
539 dbg(" Range length: %08X", datafio->range_length);
540}
541
542static void acpi_parse_address16_32 (
543 struct acpi_bridge *ab,
544 union acpi_resource_data *data,
545 acpi_resource_type id
546 )
547{
548 /*
549 * acpi_resource_address16 == acpi_resource_address32
550 * acpi_resource_address16 *data16 = (acpi_resource_address16 *) data;
551 */
552 struct acpi_resource_address32 *data32 = (struct acpi_resource_address32 *) data;
553 struct pci_resource **aprh, **tprh;
554
555 if (id == ACPI_RSTYPE_ADDRESS16)
556 dbg("acpi_shpchprm:16-Bit Address Space Resource\n");
557 else
558 dbg("acpi_shpchprm:32-Bit Address Space Resource\n");
559
560 switch (data32->resource_type) {
561 case ACPI_MEMORY_RANGE:
562 dbg(" Resource Type: Memory Range\n");
563 aprh = &ab->mem_head;
564 tprh = &ab->tmem_head;
565
566 switch (data32->attribute.memory.cache_attribute) {
567 case ACPI_NON_CACHEABLE_MEMORY:
568 dbg(" Type Specific: Noncacheable memory\n");
569 break;
570 case ACPI_CACHABLE_MEMORY:
571 dbg(" Type Specific: Cacheable memory\n");
572 break;
573 case ACPI_WRITE_COMBINING_MEMORY:
574 dbg(" Type Specific: Write-combining memory\n");
575 break;
576 case ACPI_PREFETCHABLE_MEMORY:
577 aprh = &ab->p_mem_head;
578 dbg(" Type Specific: Prefetchable memory\n");
579 break;
580 default:
581 dbg(" Type Specific: Invalid cache attribute\n");
582 break;
583 }
584
585 dbg(" Type Specific: Read%s\n", ACPI_READ_WRITE_MEMORY == data32->attribute.memory.read_write_attribute ? "/Write":" Only");
586 break;
587
588 case ACPI_IO_RANGE:
589 dbg(" Resource Type: I/O Range\n");
590 aprh = &ab->io_head;
591 tprh = &ab->tio_head;
592
593 switch (data32->attribute.io.range_attribute) {
594 case ACPI_NON_ISA_ONLY_RANGES:
595 dbg(" Type Specific: Non-ISA Io Addresses\n");
596 break;
597 case ACPI_ISA_ONLY_RANGES:
598 dbg(" Type Specific: ISA Io Addresses\n");
599 break;
600 case ACPI_ENTIRE_RANGE:
601 dbg(" Type Specific: ISA and non-ISA Io Addresses\n");
602 break;
603 default:
604 dbg(" Type Specific: Invalid range attribute\n");
605 break;
606 }
607 break;
608
609 case ACPI_BUS_NUMBER_RANGE:
610 dbg(" Resource Type: Bus Number Range(fixed)\n");
611 /* fixup to be compatible with the rest of php driver */
612 data32->min_address_range++;
613 data32->address_length--;
614 aprh = &ab->bus_head;
615 tprh = &ab->tbus_head;
616 break;
617 default:
618 dbg(" Resource Type: Invalid resource type. Exiting.\n");
619 return;
620 }
621
622 dbg(" Resource %s\n", ACPI_CONSUMER == data32->producer_consumer ? "Consumer":"Producer");
623 dbg(" %s decode\n", ACPI_SUB_DECODE == data32->decode ? "Subtractive":"Positive");
624 dbg(" Min address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->min_address_fixed ? "":"not");
625 dbg(" Max address is %s fixed\n", ACPI_ADDRESS_FIXED == data32->max_address_fixed ? "":"not");
626 dbg(" Granularity: %08X\n", data32->granularity);
627 dbg(" Address range min: %08X\n", data32->min_address_range);
628 dbg(" Address range max: %08X\n", data32->max_address_range);
629 dbg(" Address translation offset: %08X\n", data32->address_translation_offset);
630 dbg(" Address Length: %08X\n", data32->address_length);
631
632 if (0xFF != data32->resource_source.index) {
633 dbg(" Resource Source Index: %X\n", data32->resource_source.index);
634 /* dbg(" Resource Source: %s\n", data32->resource_source.string_ptr); */
635 }
636
637 shpchprm_add_resource(aprh, data32->min_address_range, data32->address_length);
638}
639
640static acpi_status acpi_parse_crs(
641 struct acpi_bridge *ab,
642 struct acpi_resource *crsbuf
643 )
644{
645 acpi_status status = AE_OK;
646 struct acpi_resource *resource = crsbuf;
647 u8 count = 0;
648 u8 done = 0;
649
650 while (!done) {
651 dbg("acpi_shpchprm: PCI bus 0x%x Resource structure %x.\n", ab->bus, count++);
652 switch (resource->id) {
653 case ACPI_RSTYPE_IRQ:
654 dbg("Irq -------- Resource\n");
655 break;
656 case ACPI_RSTYPE_DMA:
657 dbg("DMA -------- Resource\n");
658 break;
659 case ACPI_RSTYPE_START_DPF:
660 dbg("Start DPF -------- Resource\n");
661 break;
662 case ACPI_RSTYPE_END_DPF:
663 dbg("End DPF -------- Resource\n");
664 break;
665 case ACPI_RSTYPE_IO:
666 acpi_parse_io (ab, &resource->data);
667 break;
668 case ACPI_RSTYPE_FIXED_IO:
669 acpi_parse_fixed_io (ab, &resource->data);
670 break;
671 case ACPI_RSTYPE_VENDOR:
672 dbg("Vendor -------- Resource\n");
673 break;
674 case ACPI_RSTYPE_END_TAG:
675 dbg("End_tag -------- Resource\n");
676 done = 1;
677 break;
678 case ACPI_RSTYPE_MEM24:
679 dbg("Mem24 -------- Resource\n");
680 break;
681 case ACPI_RSTYPE_MEM32:
682 dbg("Mem32 -------- Resource\n");
683 break;
684 case ACPI_RSTYPE_FIXED_MEM32:
685 dbg("Fixed Mem32 -------- Resource\n");
686 break;
687 case ACPI_RSTYPE_ADDRESS16:
688 acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS16);
689 break;
690 case ACPI_RSTYPE_ADDRESS32:
691 acpi_parse_address16_32(ab, &resource->data, ACPI_RSTYPE_ADDRESS32);
692 break;
693 case ACPI_RSTYPE_ADDRESS64:
694 info("Address64 -------- Resource unparsed\n");
695 break;
696 case ACPI_RSTYPE_EXT_IRQ:
697 dbg("Ext Irq -------- Resource\n");
698 break;
699 default:
700 dbg("Invalid -------- resource type 0x%x\n", resource->id);
701 break;
702 }
703
704 resource = (struct acpi_resource *) ((char *)resource + resource->length);
705 }
706
707 return status;
708}
709
710static acpi_status acpi_get_crs( struct acpi_bridge *ab)
711{
712 acpi_status status;
713 struct acpi_resource *crsbuf;
714
715 status = acpi_evaluate_crs(ab->handle, &crsbuf);
716 if (ACPI_SUCCESS(status)) {
717 status = acpi_parse_crs(ab, crsbuf);
718 kfree(crsbuf);
719
720 shpchp_resource_sort_and_combine(&ab->bus_head);
721 shpchp_resource_sort_and_combine(&ab->io_head);
722 shpchp_resource_sort_and_combine(&ab->mem_head);
723 shpchp_resource_sort_and_combine(&ab->p_mem_head);
724
725 shpchprm_add_resources (&ab->tbus_head, ab->bus_head);
726 shpchprm_add_resources (&ab->tio_head, ab->io_head);
727 shpchprm_add_resources (&ab->tmem_head, ab->mem_head);
728 shpchprm_add_resources (&ab->tp_mem_head, ab->p_mem_head);
729 }
730
731 return status;
732}
733
734/* find acpi_bridge downword from ab. */
735static struct acpi_bridge *
736find_acpi_bridge_by_bus(
737 struct acpi_bridge *ab,
738 int seg,
739 int bus /* pdev->subordinate->number */
740 )
741{
742 struct acpi_bridge *lab = NULL;
743
744 if (!ab)
745 return NULL;
746
747 if ((ab->bus == bus) && (ab->seg == seg))
748 return ab;
749
750 if (ab->child)
751 lab = find_acpi_bridge_by_bus(ab->child, seg, bus);
752
753 if (!lab)
754 if (ab->next)
755 lab = find_acpi_bridge_by_bus(ab->next, seg, bus);
756
757 return lab;
758}
759
760/*
761 * Build a device tree of ACPI PCI Bridges
762 */
763static void shpchprm_acpi_register_a_bridge (
764 struct acpi_bridge **head,
765 struct acpi_bridge *pab, /* parent bridge to which child bridge is added */
766 struct acpi_bridge *cab /* child bridge to add */
767 )
768{
769 struct acpi_bridge *lpab;
770 struct acpi_bridge *lcab;
771
772 lpab = find_acpi_bridge_by_bus(*head, pab->seg, pab->bus);
773 if (!lpab) {
774 if (!(pab->type & BRIDGE_TYPE_HOST))
775 warn("PCI parent bridge s:b(%x:%x) not in list.\n", pab->seg, pab->bus);
776 pab->next = *head;
777 *head = pab;
778 lpab = pab;
779 }
780
781 if ((cab->type & BRIDGE_TYPE_HOST) && (pab == cab))
782 return;
783
784 lcab = find_acpi_bridge_by_bus(*head, cab->seg, cab->bus);
785 if (lcab) {
786 if ((pab->bus != lcab->parent->bus) || (lcab->bus != cab->bus))
787 err("PCI child bridge s:b(%x:%x) in list with diff parent.\n", cab->seg, cab->bus);
788 return;
789 } else
790 lcab = cab;
791
792 lcab->parent = lpab;
793 lcab->next = lpab->child;
794 lpab->child = lcab;
795}
796
797static acpi_status shpchprm_acpi_build_php_slots_callback(
798 acpi_handle handle,
799 u32 Level,
800 void *context,
801 void **retval
802 )
803{
804 ulong bus_num;
805 ulong seg_num;
806 ulong sun, adr;
807 ulong padr = 0;
808 acpi_handle phandle = NULL;
809 struct acpi_bridge *pab = (struct acpi_bridge *)context;
810 struct acpi_bridge *lab;
811 acpi_status status;
812 u8 *path_name = acpi_path_name(handle);
813
814 /* get _SUN */
815 status = acpi_evaluate_integer(handle, METHOD_NAME__SUN, NULL, &sun);
816 switch(status) {
817 case AE_NOT_FOUND:
818 return AE_OK;
819 default:
820 if (ACPI_FAILURE(status)) {
821 err("acpi_shpchprm:%s _SUN fail=0x%x\n", path_name, status);
822 return status;
823 }
824 }
825
826 /* get _ADR. _ADR must exist if _SUN exists */
827 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
828 if (ACPI_FAILURE(status)) {
829 err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status);
830 return status;
831 }
832
833 dbg("acpi_shpchprm:%s sun=0x%08x adr=0x%08x\n", path_name, (u32)sun, (u32)adr);
834
835 status = acpi_get_parent(handle, &phandle);
836 if (ACPI_FAILURE(status)) {
837 err("acpi_shpchprm:%s get_parent fail=0x%x\n", path_name, status);
838 return (status);
839 }
840
841 bus_num = pab->bus;
842 seg_num = pab->seg;
843
844 if (pab->bus == bus_num) {
845 lab = pab;
846 } else {
847 dbg("WARN: pab is not parent\n");
848 lab = find_acpi_bridge_by_bus(pab, seg_num, bus_num);
849 if (!lab) {
850 dbg("acpi_shpchprm: alloc new P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
851 lab = (struct acpi_bridge *)kmalloc(sizeof(struct acpi_bridge), GFP_KERNEL);
852 if (!lab) {
853 err("acpi_shpchprm: alloc for ab fail\n");
854 return AE_NO_MEMORY;
855 }
856 memset(lab, 0, sizeof(struct acpi_bridge));
857
858 lab->handle = phandle;
859 lab->pbus = pab->bus;
860 lab->pdevice = (int)(padr >> 16) & 0xffff;
861 lab->pfunction = (int)(padr & 0xffff);
862 lab->bus = (int)bus_num;
863 lab->scanned = 0;
864 lab->type = BRIDGE_TYPE_P2P;
865
866 shpchprm_acpi_register_a_bridge (&acpi_bridges_head, pab, lab);
867 } else
868 dbg("acpi_shpchprm: found P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
869 }
870
871 acpi_add_slot_to_php_slots(lab, (int)bus_num, handle, (u32)adr, (u32)sun);
872 return (status);
873}
874
875static int shpchprm_acpi_build_php_slots(
876 struct acpi_bridge *ab,
877 u32 depth
878 )
879{
880 acpi_status status;
881 u8 *path_name = acpi_path_name(ab->handle);
882
883 /* Walk down this pci bridge to get _SUNs if any behind P2P */
884 status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
885 ab->handle,
886 depth,
887 shpchprm_acpi_build_php_slots_callback,
888 ab,
889 NULL );
890 if (ACPI_FAILURE(status)) {
891 dbg("acpi_shpchprm:%s walk for _SUN on pci bridge seg:bus(%x:%x) fail=0x%x\n", path_name, ab->seg, ab->bus, status);
892 return -1;
893 }
894
895 return 0;
896}
897
898static void build_a_bridge(
899 struct acpi_bridge *pab,
900 struct acpi_bridge *ab
901 )
902{
903 u8 *path_name = acpi_path_name(ab->handle);
904
905 shpchprm_acpi_register_a_bridge (&acpi_bridges_head, pab, ab);
906
907 switch (ab->type) {
908 case BRIDGE_TYPE_HOST:
909 dbg("acpi_shpchprm: Registered PCI HOST Bridge(%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
910 ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
911 break;
912 case BRIDGE_TYPE_P2P:
913 dbg("acpi_shpchprm: Registered PCI P2P Bridge(%02x-%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
914 ab->pbus, ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
915 break;
916 };
917
918 /* build any immediate PHP slots under this pci bridge */
919 shpchprm_acpi_build_php_slots(ab, 1);
920}
921
922static struct acpi_bridge * add_p2p_bridge(
923 acpi_handle handle,
924 struct acpi_bridge *pab, /* parent */
925 ulong adr
926 )
927{
928 struct acpi_bridge *ab;
929 struct pci_dev *pdev;
930 ulong devnum, funcnum;
931 u8 *path_name = acpi_path_name(handle);
932
933 ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
934 if (!ab) {
935 err("acpi_shpchprm: alloc for ab fail\n");
936 return NULL;
937 }
938 memset(ab, 0, sizeof(struct acpi_bridge));
939
940 devnum = (adr >> 16) & 0xffff;
941 funcnum = adr & 0xffff;
942
943 pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
944 if (!pdev || !pdev->subordinate) {
945 err("acpi_shpchprm:%s is not a P2P Bridge\n", path_name);
946 kfree(ab);
947 return NULL;
948 }
949
950 ab->handle = handle;
951 ab->seg = pab->seg;
952 ab->pbus = pab->bus; /* or pdev->bus->number */
953 ab->pdevice = devnum; /* or PCI_SLOT(pdev->devfn) */
954 ab->pfunction = funcnum; /* or PCI_FUNC(pdev->devfn) */
955 ab->bus = pdev->subordinate->number;
956 ab->scanned = 0;
957 ab->type = BRIDGE_TYPE_P2P;
958
959 dbg("acpi_shpchprm: P2P(%x-%x) on pci=b:d:f(%x:%x:%x) acpi=b:d:f(%x:%x:%x) [%s]\n",
960 pab->bus, ab->bus, pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
961 pab->bus, (u32)devnum, (u32)funcnum, path_name);
962
963 build_a_bridge(pab, ab);
964
965 return ab;
966}
967
968static acpi_status scan_p2p_bridge(
969 acpi_handle handle,
970 u32 Level,
971 void *context,
972 void **retval
973 )
974{
975 struct acpi_bridge *pab = (struct acpi_bridge *)context;
976 struct acpi_bridge *ab;
977 acpi_status status;
978 ulong adr = 0;
979 u8 *path_name = acpi_path_name(handle);
980 ulong devnum, funcnum;
981 struct pci_dev *pdev;
982
983 /* get device, function */
984 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
985 if (ACPI_FAILURE(status)) {
986 if (status != AE_NOT_FOUND)
987 err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status);
988 return AE_OK;
989 }
990
991 devnum = (adr >> 16) & 0xffff;
992 funcnum = adr & 0xffff;
993
994 pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
995 if (!pdev)
996 return AE_OK;
997 if (!pdev->subordinate)
998 return AE_OK;
999
1000 ab = add_p2p_bridge(handle, pab, adr);
1001 if (ab) {
1002 status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
1003 handle,
1004 (u32)1,
1005 scan_p2p_bridge,
1006 ab,
1007 NULL);
1008 if (ACPI_FAILURE(status))
1009 dbg("acpi_shpchprm:%s find_p2p fail=0x%x\n", path_name, status);
1010 }
1011
1012 return AE_OK;
1013}
1014
1015static struct acpi_bridge * add_host_bridge(
1016 acpi_handle handle,
1017 ulong segnum,
1018 ulong busnum
1019 )
1020{
1021 ulong adr = 0;
1022 acpi_status status;
1023 struct acpi_bridge *ab;
1024 u8 *path_name = acpi_path_name(handle);
1025
1026 /* get device, function: host br adr is always 0000 though. */
1027 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
1028 if (ACPI_FAILURE(status)) {
1029 err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status);
1030 return NULL;
1031 }
1032 dbg("acpi_shpchprm: ROOT PCI seg(0x%x)bus(0x%x)dev(0x%x)func(0x%x) [%s]\n", (u32)segnum, (u32)busnum,
1033 (u32)(adr >> 16) & 0xffff, (u32)adr & 0xffff, path_name);
1034
1035 ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
1036 if (!ab) {
1037 err("acpi_shpchprm: alloc for ab fail\n");
1038 return NULL;
1039 }
1040 memset(ab, 0, sizeof(struct acpi_bridge));
1041
1042 ab->handle = handle;
1043 ab->seg = (int)segnum;
1044 ab->bus = ab->pbus = (int)busnum;
1045 ab->pdevice = (int)(adr >> 16) & 0xffff;
1046 ab->pfunction = (int)(adr & 0xffff);
1047 ab->scanned = 0;
1048 ab->type = BRIDGE_TYPE_HOST;
1049
1050 /* get root pci bridge's current resources */
1051 status = acpi_get_crs(ab);
1052 if (ACPI_FAILURE(status)) {
1053 err("acpi_shpchprm:%s evaluate _CRS fail=0x%x\n", path_name, status);
1054 kfree(ab);
1055 return NULL;
1056 }
1057 build_a_bridge(ab, ab);
1058
1059 return ab;
1060}
1061
1062static acpi_status acpi_scan_from_root_pci_callback (
1063 acpi_handle handle,
1064 u32 Level,
1065 void *context,
1066 void **retval
1067 )
1068{
1069 ulong segnum = 0;
1070 ulong busnum = 0;
1071 acpi_status status;
1072 struct acpi_bridge *ab;
1073 u8 *path_name = acpi_path_name(handle);
1074
1075 /* get bus number of this pci root bridge */
1076 status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segnum);
1077 if (ACPI_FAILURE(status)) {
1078 if (status != AE_NOT_FOUND) {
1079 err("acpi_shpchprm:%s evaluate _SEG fail=0x%x\n", path_name, status);
1080 return status;
1081 }
1082 segnum = 0;
1083 }
1084
1085 /* get bus number of this pci root bridge */
1086 status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &busnum);
1087 if (ACPI_FAILURE(status)) {
1088 err("acpi_shpchprm:%s evaluate _BBN fail=0x%x\n", path_name, status);
1089 return (status);
1090 }
1091
1092 ab = add_host_bridge(handle, segnum, busnum);
1093 if (ab) {
1094 status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
1095 handle,
1096 1,
1097 scan_p2p_bridge,
1098 ab,
1099 NULL);
1100 if (ACPI_FAILURE(status))
1101 dbg("acpi_shpchprm:%s find_p2p fail=0x%x\n", path_name, status);
1102 }
1103
1104 return AE_OK;
1105}
1106
1107static int shpchprm_acpi_scan_pci (void)
1108{
1109 acpi_status status;
1110
1111 /*
1112 * TBD: traverse LDM device tree with the help of
1113 * unified ACPI augmented for php device population.
1114 */
1115 status = acpi_get_devices ( PCI_ROOT_HID_STRING,
1116 acpi_scan_from_root_pci_callback,
1117 NULL,
1118 NULL );
1119 if (ACPI_FAILURE(status)) {
1120 err("acpi_shpchprm:get_device PCI ROOT HID fail=0x%x\n", status);
1121 return -1;
1122 }
1123
1124 return 0;
1125}
1126
1127int shpchprm_init(enum php_ctlr_type ctlr_type)
1128{
1129 int rc;
1130
1131 if (ctlr_type != PCI)
1132 return -ENODEV;
1133
1134 dbg("shpchprm ACPI init <enter>\n");
1135 acpi_bridges_head = NULL;
1136
1137 /* construct PCI bus:device tree of acpi_handles */
1138 rc = shpchprm_acpi_scan_pci();
1139 if (rc)
1140 return rc;
1141
1142 dbg("shpchprm ACPI init %s\n", (rc)?"fail":"success");
1143 return rc;
1144}
1145
1146static void free_a_slot(struct acpi_php_slot *aps)
1147{
1148 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);
1149
1150 free_pci_resource (aps->io_head);
1151 free_pci_resource (aps->bus_head);
1152 free_pci_resource (aps->mem_head);
1153 free_pci_resource (aps->p_mem_head);
1154
1155 kfree(aps);
1156}
1157
1158static void free_a_bridge( struct acpi_bridge *ab)
1159{
1160 struct acpi_php_slot *aps, *next;
1161
1162 switch (ab->type) {
1163 case BRIDGE_TYPE_HOST:
1164 dbg("Free ACPI PCI HOST Bridge(%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
1165 ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
1166 break;
1167 case BRIDGE_TYPE_P2P:
1168 dbg("Free ACPI PCI P2P Bridge(%x-%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
1169 ab->pbus, ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
1170 break;
1171 };
1172
1173 /* free slots first */
1174 for (aps = ab->slots; aps; aps = next) {
1175 next = aps->next;
1176 free_a_slot(aps);
1177 }
1178
1179 free_pci_resource (ab->io_head);
1180 free_pci_resource (ab->tio_head);
1181 free_pci_resource (ab->bus_head);
1182 free_pci_resource (ab->tbus_head);
1183 free_pci_resource (ab->mem_head);
1184 free_pci_resource (ab->tmem_head);
1185 free_pci_resource (ab->p_mem_head);
1186 free_pci_resource (ab->tp_mem_head);
1187
1188 kfree(ab);
1189}
1190
1191static void shpchprm_free_bridges ( struct acpi_bridge *ab)
1192{
1193 if (!ab)
1194 return;
1195
1196 if (ab->child)
1197 shpchprm_free_bridges (ab->child);
1198
1199 if (ab->next)
1200 shpchprm_free_bridges (ab->next);
1201
1202 free_a_bridge(ab);
1203}
1204
1205void shpchprm_cleanup(void)
1206{
1207 shpchprm_free_bridges (acpi_bridges_head);
1208}
1209
1210static int get_number_of_slots (
1211 struct acpi_bridge *ab,
1212 int selfonly
1213 )
1214{
1215 struct acpi_php_slot *aps;
1216 int prev_slot = -1;
1217 int slot_num = 0;
1218
1219 for ( aps = ab->slots; aps; aps = aps->next)
1220 if (aps->dev != prev_slot) {
1221 prev_slot = aps->dev;
1222 slot_num++;
1223 }
1224
1225 if (ab->child)
1226 slot_num += get_number_of_slots (ab->child, 0);
1227
1228 if (selfonly)
1229 return slot_num;
1230
1231 if (ab->next)
1232 slot_num += get_number_of_slots (ab->next, 0);
1233
1234 return slot_num;
1235}
1236
1237static int print_acpi_resources (struct acpi_bridge *ab)
1238{
1239 struct acpi_php_slot *aps;
1240 int i;
1241
1242 switch (ab->type) {
1243 case BRIDGE_TYPE_HOST:
1244 dbg("PCI HOST Bridge (%x) [%s]\n", ab->bus, acpi_path_name(ab->handle));
1245 break;
1246 case BRIDGE_TYPE_P2P:
1247 dbg("PCI P2P Bridge (%x-%x) [%s]\n", ab->pbus, ab->bus, acpi_path_name(ab->handle));
1248 break;
1249 };
1250
1251 print_pci_resources (ab);
1252
1253 for ( i = -1, aps = ab->slots; aps; aps = aps->next) {
1254 if (aps->dev == i)
1255 continue;
1256 dbg(" Slot sun(%x) s:b:d:f(%02x:%02x:%02x:%02x)\n", aps->sun, aps->seg, aps->bus, aps->dev, aps->fun);
1257 print_slot_resources(aps);
1258 i = aps->dev;
1259 }
1260
1261 if (ab->child)
1262 print_acpi_resources (ab->child);
1263
1264 if (ab->next)
1265 print_acpi_resources (ab->next);
1266
1267 return 0;
1268}
1269
1270int shpchprm_print_pirt(void)
1271{
1272 dbg("SHPCHPRM ACPI Slots\n");
1273 if (acpi_bridges_head)
1274 print_acpi_resources (acpi_bridges_head);
1275 return 0;
1276}
1277
1278static struct acpi_php_slot * get_acpi_slot (
1279 struct acpi_bridge *ab,
1280 u32 sun
1281 )
1282{
1283 struct acpi_php_slot *aps = NULL;
1284
1285 for ( aps = ab->slots; aps; aps = aps->next)
1286 if (aps->sun == sun)
1287 return aps;
1288
1289 if (!aps && ab->child) {
1290 aps = (struct acpi_php_slot *)get_acpi_slot (ab->child, sun);
1291 if (aps)
1292 return aps;
1293 }
1294
1295 if (!aps && ab->next) {
1296 aps = (struct acpi_php_slot *)get_acpi_slot (ab->next, sun);
1297 if (aps)
1298 return aps;
1299 }
1300
1301 return aps;
1302
1303}
1304
1305#if 0
1306static void * shpchprm_get_slot(struct slot *slot)
1307{
1308 struct acpi_bridge *ab = acpi_bridges_head;
1309 struct acpi_php_slot *aps = get_acpi_slot (ab, slot->number);
1310
1311 aps->slot = slot;
1312
1313 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);
1314
1315 return (void *)aps;
1316}
1317#endif
1318
1319static void shpchprm_dump_func_res( struct pci_func *fun)
1320{
1321 struct pci_func *func = fun;
1322
1323 if (func->bus_head) {
1324 dbg(": BUS Resources:\n");
1325 print_pci_resource (func->bus_head);
1326 }
1327 if (func->io_head) {
1328 dbg(": IO Resources:\n");
1329 print_pci_resource (func->io_head);
1330 }
1331 if (func->mem_head) {
1332 dbg(": MEM Resources:\n");
1333 print_pci_resource (func->mem_head);
1334 }
1335 if (func->p_mem_head) {
1336 dbg(": PMEM Resources:\n");
1337 print_pci_resource (func->p_mem_head);
1338 }
1339}
1340
1341static void shpchprm_dump_ctrl_res( struct controller *ctlr)
1342{
1343 struct controller *ctrl = ctlr;
1344
1345 if (ctrl->bus_head) {
1346 dbg(": BUS Resources:\n");
1347 print_pci_resource (ctrl->bus_head);
1348 }
1349 if (ctrl->io_head) {
1350 dbg(": IO Resources:\n");
1351 print_pci_resource (ctrl->io_head);
1352 }
1353 if (ctrl->mem_head) {
1354 dbg(": MEM Resources:\n");
1355 print_pci_resource (ctrl->mem_head);
1356 }
1357 if (ctrl->p_mem_head) {
1358 dbg(": PMEM Resources:\n");
1359 print_pci_resource (ctrl->p_mem_head);
1360 }
1361}
1362
1363static int shpchprm_get_used_resources (
1364 struct controller *ctrl,
1365 struct pci_func *func
1366 )
1367{
1368 return shpchp_save_used_resources (ctrl, func, !DISABLE_CARD);
1369}
1370
1371static int configure_existing_function(
1372 struct controller *ctrl,
1373 struct pci_func *func
1374 )
1375{
1376 int rc;
1377
1378 /* see how much resources the func has used. */
1379 rc = shpchprm_get_used_resources (ctrl, func);
1380
1381 if (!rc) {
1382 /* subtract the resources used by the func from ctrl resources */
1383 rc = shpchprm_delete_resources (&ctrl->bus_head, func->bus_head);
1384 rc |= shpchprm_delete_resources (&ctrl->io_head, func->io_head);
1385 rc |= shpchprm_delete_resources (&ctrl->mem_head, func->mem_head);
1386 rc |= shpchprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
1387 if (rc)
1388 warn("aCEF: cannot del used resources\n");
1389 } else
1390 err("aCEF: cannot get used resources\n");
1391
1392 return rc;
1393}
1394
1395static int bind_pci_resources_to_slots ( struct controller *ctrl)
1396{
1397 struct pci_func *func, new_func;
1398 int busn = ctrl->slot_bus;
1399 int devn, funn;
1400 u32 vid;
1401
1402 for (devn = 0; devn < 32; devn++) {
1403 for (funn = 0; funn < 8; funn++) {
1404 /*
1405 if (devn == ctrl->device && funn == ctrl->function)
1406 continue;
1407 */
1408 /* find out if this entry is for an occupied slot */
1409 vid = 0xFFFFFFFF;
1410 pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
1411
1412 if (vid != 0xFFFFFFFF) {
1413 func = shpchp_slot_find(busn, devn, funn);
1414 if (!func) {
1415 memset(&new_func, 0, sizeof(struct pci_func));
1416 new_func.bus = busn;
1417 new_func.device = devn;
1418 new_func.function = funn;
1419 new_func.is_a_board = 1;
1420 configure_existing_function(ctrl, &new_func);
1421 shpchprm_dump_func_res(&new_func);
1422 } else {
1423 configure_existing_function(ctrl, func);
1424 shpchprm_dump_func_res(func);
1425 }
1426 dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
1427 }
1428 }
1429 }
1430
1431 return 0;
1432}
1433
1434static int bind_pci_resources(
1435 struct controller *ctrl,
1436 struct acpi_bridge *ab
1437 )
1438{
1439 int status = 0;
1440
1441 if (ab->bus_head) {
1442 dbg("bapr: BUS Resources add on PCI 0x%x\n", ab->bus);
1443 status = shpchprm_add_resources (&ctrl->bus_head, ab->bus_head);
1444 if (shpchprm_delete_resources (&ab->bus_head, ctrl->bus_head))
1445 warn("bapr: cannot sub BUS Resource on PCI 0x%x\n", ab->bus);
1446 if (status) {
1447 err("bapr: BUS Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1448 return status;
1449 }
1450 } else
1451 info("bapr: No BUS Resource on PCI 0x%x.\n", ab->bus);
1452
1453 if (ab->io_head) {
1454 dbg("bapr: IO Resources add on PCI 0x%x\n", ab->bus);
1455 status = shpchprm_add_resources (&ctrl->io_head, ab->io_head);
1456 if (shpchprm_delete_resources (&ab->io_head, ctrl->io_head))
1457 warn("bapr: cannot sub IO Resource on PCI 0x%x\n", ab->bus);
1458 if (status) {
1459 err("bapr: IO Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1460 return status;
1461 }
1462 } else
1463 info("bapr: No IO Resource on PCI 0x%x.\n", ab->bus);
1464
1465 if (ab->mem_head) {
1466 dbg("bapr: MEM Resources add on PCI 0x%x\n", ab->bus);
1467 status = shpchprm_add_resources (&ctrl->mem_head, ab->mem_head);
1468 if (shpchprm_delete_resources (&ab->mem_head, ctrl->mem_head))
1469 warn("bapr: cannot sub MEM Resource on PCI 0x%x\n", ab->bus);
1470 if (status) {
1471 err("bapr: MEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1472 return status;
1473 }
1474 } else
1475 info("bapr: No MEM Resource on PCI 0x%x.\n", ab->bus);
1476
1477 if (ab->p_mem_head) {
1478 dbg("bapr: PMEM Resources add on PCI 0x%x\n", ab->bus);
1479 status = shpchprm_add_resources (&ctrl->p_mem_head, ab->p_mem_head);
1480 if (shpchprm_delete_resources (&ab->p_mem_head, ctrl->p_mem_head))
1481 warn("bapr: cannot sub PMEM Resource on PCI 0x%x\n", ab->bus);
1482 if (status) {
1483 err("bapr: PMEM Resource add on PCI 0x%x: fail=0x%x\n", ab->bus, status);
1484 return status;
1485 }
1486 } else
1487 info("bapr: No PMEM Resource on PCI 0x%x.\n", ab->bus);
1488
1489 return status;
1490}
1491
1492static int no_pci_resources( struct acpi_bridge *ab)
1493{
1494 return !(ab->p_mem_head || ab->mem_head || ab->io_head || ab->bus_head);
1495}
1496
1497static int find_pci_bridge_resources (
1498 struct controller *ctrl,
1499 struct acpi_bridge *ab
1500 )
1501{
1502 int rc = 0;
1503 struct pci_func func;
1504
1505 memset(&func, 0, sizeof(struct pci_func));
1506
1507 func.bus = ab->pbus;
1508 func.device = ab->pdevice;
1509 func.function = ab->pfunction;
1510 func.is_a_board = 1;
1511
1512 /* Get used resources for this PCI bridge */
1513 rc = shpchp_save_used_resources (ctrl, &func, !DISABLE_CARD);
1514
1515 ab->io_head = func.io_head;
1516 ab->mem_head = func.mem_head;
1517 ab->p_mem_head = func.p_mem_head;
1518 ab->bus_head = func.bus_head;
1519 if (ab->bus_head)
1520 shpchprm_delete_resource(&ab->bus_head, ctrl->bus, 1);
1521
1522 return rc;
1523}
1524
1525static int get_pci_resources_from_bridge(
1526 struct controller *ctrl,
1527 struct acpi_bridge *ab
1528 )
1529{
1530 int rc = 0;
1531
1532 dbg("grfb: Get Resources for PCI 0x%x from actual PCI bridge 0x%x.\n", ctrl->bus, ab->bus);
1533
1534 rc = find_pci_bridge_resources (ctrl, ab);
1535
1536 shpchp_resource_sort_and_combine(&ab->bus_head);
1537 shpchp_resource_sort_and_combine(&ab->io_head);
1538 shpchp_resource_sort_and_combine(&ab->mem_head);
1539 shpchp_resource_sort_and_combine(&ab->p_mem_head);
1540
1541 shpchprm_add_resources (&ab->tbus_head, ab->bus_head);
1542 shpchprm_add_resources (&ab->tio_head, ab->io_head);
1543 shpchprm_add_resources (&ab->tmem_head, ab->mem_head);
1544 shpchprm_add_resources (&ab->tp_mem_head, ab->p_mem_head);
1545
1546 return rc;
1547}
1548
1549static int get_pci_resources(
1550 struct controller *ctrl,
1551 struct acpi_bridge *ab
1552 )
1553{
1554 int rc = 0;
1555
1556 if (no_pci_resources(ab)) {
1557 dbg("spbr:PCI 0x%x has no resources. Get parent resources.\n", ab->bus);
1558 rc = get_pci_resources_from_bridge(ctrl, ab);
1559 }
1560
1561 return rc;
1562}
1563
1564int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
1565{
1566 int offset = devnum - ctrl->slot_device_offset;
1567
1568 dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__, ctrl->slot_num_inc, offset);
1569 *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc *offset);
1570 return 0;
1571}
1572
1573/*
1574 * Get resources for this ctrl.
1575 * 1. get total resources from ACPI _CRS or bridge (this ctrl)
1576 * 2. find used resources of existing adapters
1577 * 3. subtract used resources from total resources
1578 */
1579int shpchprm_find_available_resources( struct controller *ctrl)
1580{
1581 int rc = 0;
1582 struct acpi_bridge *ab;
1583
1584 ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->pci_dev->subordinate->number);
1585 if (!ab) {
1586 err("pfar:cannot locate acpi bridge of PCI 0x%x.\n", ctrl->pci_dev->subordinate->number);
1587 return -1;
1588 }
1589 if (no_pci_resources(ab)) {
1590 rc = get_pci_resources(ctrl, ab);
1591 if (rc) {
1592 err("pfar:cannot get pci resources of PCI 0x%x.\n",ctrl->pci_dev->subordinate->number);
1593 return -1;
1594 }
1595 }
1596
1597 rc = bind_pci_resources(ctrl, ab);
1598 dbg("pfar:pre-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number);
1599 shpchprm_dump_ctrl_res(ctrl);
1600
1601 bind_pci_resources_to_slots (ctrl);
1602
1603 dbg("pfar:post-Bind PCI 0x%x Ctrl Resource Dump\n", ctrl->pci_dev->subordinate->number);
1604 shpchprm_dump_ctrl_res(ctrl);
1605
1606 return rc;
1607}
1608
1609int shpchprm_set_hpp(
1610 struct controller *ctrl,
1611 struct pci_func *func,
1612 u8 card_type
1613 )
1614{
1615 struct acpi_bridge *ab;
1616 struct pci_bus lpci_bus, *pci_bus;
1617 int rc = 0;
1618 unsigned int devfn;
1619 u8 cls= 0x08; /* default cache line size */
1620 u8 lt = 0x40; /* default latency timer */
1621 u8 ep = 0;
1622 u8 es = 0;
1623
1624 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
1625 pci_bus = &lpci_bus;
1626 pci_bus->number = func->bus;
1627 devfn = PCI_DEVFN(func->device, func->function);
1628
7a8cb869 1629 ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->slot_bus);
1da177e4
LT		 1630
1631 if (ab) {
1632 if (ab->_hpp) {
1633 lt = (u8)ab->_hpp->latency_timer;
1634 cls = (u8)ab->_hpp->cache_line_size;
1635 ep = (u8)ab->_hpp->enable_perr;
1636 es = (u8)ab->_hpp->enable_serr;
1637 } else
1638 dbg("_hpp: no _hpp for B/D/F=%#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
1639 } else
1640 dbg("_hpp: no acpi bridge for B/D/F = %#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
1641
1642
1643 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
1644 /* set subordinate Latency Timer */
1645 rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, lt);
1646 }
1647
1648 /* set base Latency Timer */
1649 rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, lt);
1650 dbg(" set latency timer =0x%02x: %x\n", lt, rc);
1651
1652 rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, cls);
1653 dbg(" set cache_line_size=0x%02x: %x\n", cls, rc);
1654
1655 return rc;
1656}
1657
1658void shpchprm_enable_card(
1659 struct controller *ctrl,
1660 struct pci_func *func,
1661 u8 card_type)
1662{
1663 u16 command, cmd, bcommand, bcmd;
1664 struct pci_bus lpci_bus, *pci_bus;
1665 struct acpi_bridge *ab;
1666 unsigned int devfn;
1667 int rc;
1668
1669 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
1670 pci_bus = &lpci_bus;
1671 pci_bus->number = func->bus;
1672 devfn = PCI_DEVFN(func->device, func->function);
1673
1674 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
1675
1676 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
1677 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
1678 }
1679
1680 cmd = command = command | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
1681 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
1682 bcmd = bcommand = bcommand | PCI_BRIDGE_CTL_NO_ISA;
1683
2ac2610b 1684 ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->slot_bus);
1da177e4
LT		 1685 if (ab) {
1686 if (ab->_hpp) {
1687 if (ab->_hpp->enable_perr) {
1688 command |= PCI_COMMAND_PARITY;
1689 bcommand |= PCI_BRIDGE_CTL_PARITY;
1690 } else {
1691 command &= ~PCI_COMMAND_PARITY;
1692 bcommand &= ~PCI_BRIDGE_CTL_PARITY;
1693 }
1694 if (ab->_hpp->enable_serr) {
1695 command |= PCI_COMMAND_SERR;
1696 bcommand |= PCI_BRIDGE_CTL_SERR;
1697 } else {
1698 command &= ~PCI_COMMAND_SERR;
1699 bcommand &= ~PCI_BRIDGE_CTL_SERR;
1700 }
1701 } else
1702 dbg("no _hpp for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
1703 } else
1704 dbg("no acpi bridge for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
1705
1706 if (command != cmd) {
1707 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
1708 }
1709 if ((card_type == PCI_HEADER_TYPE_BRIDGE) && (bcommand != bcmd)) {
1710 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
1711 }
1712}
1713
Linux 6.x block layer and io_uring tree(s)