drivers/pci/hotplug/pciehprm_acpi.c

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