drivers/pci/hotplug/shpchprm_acpi.c

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