drivers/pci/hotplug/pciehp_ctrl.c

   1 /*
   2  * PCI Express Hot Plug Controller Driver
   3  *
   4  * Copyright (C) 1995,2001 Compaq Computer Corporation
   5  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   6  * Copyright (C) 2001 IBM Corp.
   7  * Copyright (C) 2003-2004 Intel Corporation
   8  *
   9  * All rights reserved.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  19  * NON INFRINGEMENT.  See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
  27  *
  28  */
  29
  30 #include <linux/config.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/types.h>
  34 #include <linux/slab.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/delay.h>
  38 #include <linux/wait.h>
  39 #include <linux/smp_lock.h>
  40 #include <linux/pci.h>
  41 #include "../pci.h"
  42 #include "pciehp.h"
  43 #include "pciehprm.h"
  44
  45 static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
  46         u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev);
  47 static int configure_new_function( struct controller *ctrl, struct pci_func *func,
  48         u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev);
  49 static void interrupt_event_handler(struct controller *ctrl);
  50
  51 static struct semaphore event_semaphore;        /* mutex for process loop (up if something to process) */
  52 static struct semaphore event_exit;             /* guard ensure thread has exited before calling it quits */
  53 static int event_finished;
  54 static unsigned long pushbutton_pending;        /* = 0 */
  55 static unsigned long surprise_rm_pending;       /* = 0 */
  56
  57 u8 pciehp_handle_attention_button(u8 hp_slot, void *inst_id)
  58 {
  59         struct controller *ctrl = (struct controller *) inst_id;
  60         struct slot *p_slot;
  61         u8 rc = 0;
  62         u8 getstatus;
  63         struct pci_func *func;
  64         struct event_info *taskInfo;
  65
  66         /* Attention Button Change */
  67         dbg("pciehp:  Attention button interrupt received.\n");
  68
  69         func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
  70
  71         /* This is the structure that tells the worker thread what to do */
  72         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
  73         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
  74
  75         p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
  76         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
  77
  78         ctrl->next_event = (ctrl->next_event + 1) % 10;
  79         taskInfo->hp_slot = hp_slot;
  80
  81         rc++;
  82
  83         /*
  84          *  Button pressed - See if need to TAKE ACTION!!!
  85          */
  86         info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
  87         taskInfo->event_type = INT_BUTTON_PRESS;
  88
  89         if ((p_slot->state == BLINKINGON_STATE)
  90             || (p_slot->state == BLINKINGOFF_STATE)) {
  91                 /* Cancel if we are still blinking; this means that we press the
  92                  * attention again before the 5 sec. limit expires to cancel hot-add
  93                  * or hot-remove
  94                  */
  95                 taskInfo->event_type = INT_BUTTON_CANCEL;
  96                 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
  97         } else if ((p_slot->state == POWERON_STATE)
  98                    || (p_slot->state == POWEROFF_STATE)) {
  99                 /* Ignore if the slot is on power-on or power-off state; this
 100                  * means that the previous attention button action to hot-add or
 101                  * hot-remove is undergoing
 102                  */
 103                 taskInfo->event_type = INT_BUTTON_IGNORE;
 104                 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
 105         }
 106
 107         if (rc)
 108                 up(&event_semaphore);   /* signal event thread that new event is posted */
 109
 110         return 0;
 111
 112 }
 113
 114 u8 pciehp_handle_switch_change(u8 hp_slot, void *inst_id)
 115 {
 116         struct controller *ctrl = (struct controller *) inst_id;
 117         struct slot *p_slot;
 118         u8 rc = 0;
 119         u8 getstatus;
 120         struct pci_func *func;
 121         struct event_info *taskInfo;
 122
 123         /* Switch Change */
 124         dbg("pciehp:  Switch interrupt received.\n");
 125
 126         func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
 127
 128         /* This is the structure that tells the worker thread
 129          * what to do
 130          */
 131         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 132         ctrl->next_event = (ctrl->next_event + 1) % 10;
 133         taskInfo->hp_slot = hp_slot;
 134
 135         rc++;
 136         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 137         p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
 138         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 139
 140         if (getstatus) {
 141                 /*
 142                  * Switch opened
 143                  */
 144                 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
 145                 func->switch_save = 0;
 146                 taskInfo->event_type = INT_SWITCH_OPEN;
 147         } else {
 148                 /*
 149                  *  Switch closed
 150                  */
 151                 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
 152                 func->switch_save = 0x10;
 153                 taskInfo->event_type = INT_SWITCH_CLOSE;
 154         }
 155
 156         if (rc)
 157                 up(&event_semaphore);   /* signal event thread that new event is posted */
 158
 159         return rc;
 160 }
 161
 162 u8 pciehp_handle_presence_change(u8 hp_slot, void *inst_id)
 163 {
 164         struct controller *ctrl = (struct controller *) inst_id;
 165         struct slot *p_slot;
 166         u8 rc = 0;
 167         struct pci_func *func;
 168         struct event_info *taskInfo;
 169
 170         /* Presence Change */
 171         dbg("pciehp:  Presence/Notify input change.\n");
 172
 173         func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
 174
 175         /* This is the structure that tells the worker thread
 176          * what to do
 177          */
 178         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 179         ctrl->next_event = (ctrl->next_event + 1) % 10;
 180         taskInfo->hp_slot = hp_slot;
 181
 182         rc++;
 183         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 184
 185         /* Switch is open, assume a presence change
 186          * Save the presence state
 187          */
 188         p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
 189         if (func->presence_save) {
 190                 /*
 191                  * Card Present
 192                  */
 193                 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
 194                 taskInfo->event_type = INT_PRESENCE_ON;
 195         } else {
 196                 /*
 197                  * Not Present
 198                  */
 199                 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
 200                 taskInfo->event_type = INT_PRESENCE_OFF;
 201         }
 202
 203         if (rc)
 204                 up(&event_semaphore);   /* signal event thread that new event is posted */
 205
 206         return rc;
 207 }
 208
 209 u8 pciehp_handle_power_fault(u8 hp_slot, void *inst_id)
 210 {
 211         struct controller *ctrl = (struct controller *) inst_id;
 212         struct slot *p_slot;
 213         u8 rc = 0;
 214         struct pci_func *func;
 215         struct event_info *taskInfo;
 216
 217         /* power fault */
 218         dbg("pciehp:  Power fault interrupt received.\n");
 219
 220         func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
 221
 222         /* this is the structure that tells the worker thread
 223          * what to do
 224          */
 225         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 226         ctrl->next_event = (ctrl->next_event + 1) % 10;
 227         taskInfo->hp_slot = hp_slot;
 228
 229         rc++;
 230         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 231
 232         if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
 233                 /*
 234                  * power fault Cleared
 235                  */
 236                 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
 237                 func->status = 0x00;
 238                 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
 239         } else {
 240                 /*
 241                  *   power fault
 242                  */
 243                 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
 244                 taskInfo->event_type = INT_POWER_FAULT;
 245                 /* set power fault status for this board */
 246                 func->status = 0xFF;
 247                 info("power fault bit %x set\n", hp_slot);
 248         }
 249         if (rc)
 250                 up(&event_semaphore);   /* signal event thread that new event is posted */
 251
 252         return rc;
 253 }
 254
 255
 256 /**
 257  * sort_by_size: sort nodes by their length, smallest first.
 258  *
 259  * @head: list to sort
 260  */
 261 static int sort_by_size(struct pci_resource **head)
 262 {
 263         struct pci_resource *current_res;
 264         struct pci_resource *next_res;
 265         int out_of_order = 1;
 266
 267         if (!(*head))
 268                 return 1;
 269
 270         if (!((*head)->next))
 271                 return 0;
 272
 273         while (out_of_order) {
 274                 out_of_order = 0;
 275
 276                 /* Special case for swapping list head */
 277                 if (((*head)->next) &&
 278                     ((*head)->length > (*head)->next->length)) {
 279                         out_of_order++;
 280                         current_res = *head;
 281                         *head = (*head)->next;
 282                         current_res->next = (*head)->next;
 283                         (*head)->next = current_res;
 284                 }
 285
 286                 current_res = *head;
 287
 288                 while (current_res->next && current_res->next->next) {
 289                         if (current_res->next->length > current_res->next->next->length) {
 290                                 out_of_order++;
 291                                 next_res = current_res->next;
 292                                 current_res->next = current_res->next->next;
 293                                 current_res = current_res->next;
 294                                 next_res->next = current_res->next;
 295                                 current_res->next = next_res;
 296                         } else
 297                                 current_res = current_res->next;
 298                 }
 299         }  /* End of out_of_order loop */
 300
 301         return 0;
 302 }
 303
 304
 305 /*
 306  * sort_by_max_size
 307  *
 308  * Sorts nodes on the list by their length.
 309  * Largest first.
 310  *
 311  */
 312 static int sort_by_max_size(struct pci_resource **head)
 313 {
 314         struct pci_resource *current_res;
 315         struct pci_resource *next_res;
 316         int out_of_order = 1;
 317
 318         if (!(*head))
 319                 return 1;
 320
 321         if (!((*head)->next))
 322                 return 0;
 323
 324         while (out_of_order) {
 325                 out_of_order = 0;
 326
 327                 /* Special case for swapping list head */
 328                 if (((*head)->next) &&
 329                     ((*head)->length < (*head)->next->length)) {
 330                         out_of_order++;
 331                         current_res = *head;
 332                         *head = (*head)->next;
 333                         current_res->next = (*head)->next;
 334                         (*head)->next = current_res;
 335                 }
 336
 337                 current_res = *head;
 338
 339                 while (current_res->next && current_res->next->next) {
 340                         if (current_res->next->length < current_res->next->next->length) {
 341                                 out_of_order++;
 342                                 next_res = current_res->next;
 343                                 current_res->next = current_res->next->next;
 344                                 current_res = current_res->next;
 345                                 next_res->next = current_res->next;
 346                                 current_res->next = next_res;
 347                         } else
 348                                 current_res = current_res->next;
 349                 }
 350         }  /* End of out_of_order loop */
 351
 352         return 0;
 353 }
 354
 355
 356 /**
 357  * do_pre_bridge_resource_split: return one unused resource node
 358  * @head: list to scan
 359  *
 360  */
 361 static struct pci_resource *
 362 do_pre_bridge_resource_split(struct pci_resource **head,
 363                                 struct pci_resource **orig_head, u32 alignment)
 364 {
 365         struct pci_resource *prevnode = NULL;
 366         struct pci_resource *node;
 367         struct pci_resource *split_node;
 368         u32 rc;
 369         u32 temp_dword;
 370         dbg("do_pre_bridge_resource_split\n");
 371
 372         if (!(*head) || !(*orig_head))
 373                 return NULL;
 374
 375         rc = pciehp_resource_sort_and_combine(head);
 376
 377         if (rc)
 378                 return NULL;
 379
 380         if ((*head)->base != (*orig_head)->base)
 381                 return NULL;
 382
 383         if ((*head)->length == (*orig_head)->length)
 384                 return NULL;
 385
 386
 387         /* If we got here, there the bridge requires some of the resource, but
 388          *  we may be able to split some off of the front
 389          */
 390         node = *head;
 391
 392         if (node->length & (alignment -1)) {
 393                 /* this one isn't an aligned length, so we'll make a new entry
 394                  * and split it up.
 395                  */
 396                 split_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
 397
 398                 if (!split_node)
 399                         return NULL;
 400
 401                 temp_dword = (node->length | (alignment-1)) + 1 - alignment;
 402
 403                 split_node->base = node->base;
 404                 split_node->length = temp_dword;
 405
 406                 node->length -= temp_dword;
 407                 node->base += split_node->length;
 408
 409                 /* Put it in the list */
 410                 *head = split_node;
 411                 split_node->next = node;
 412         }
 413
 414         if (node->length < alignment)
 415                 return NULL;
 416
 417         /* Now unlink it */
 418         if (*head == node) {
 419                 *head = node->next;
 420         } else {
 421                 prevnode = *head;
 422                 while (prevnode->next != node)
 423                         prevnode = prevnode->next;
 424
 425                 prevnode->next = node->next;
 426         }
 427         node->next = NULL;
 428
 429         return node;
 430 }
 431
 432
 433 /**
 434  * do_bridge_resource_split: return one unused resource node
 435  * @head: list to scan
 436  *
 437  */
 438 static struct pci_resource *
 439 do_bridge_resource_split(struct pci_resource **head, u32 alignment)
 440 {
 441         struct pci_resource *prevnode = NULL;
 442         struct pci_resource *node;
 443         u32 rc;
 444         u32 temp_dword;
 445
 446         if (!(*head))
 447                 return NULL;
 448
 449         rc = pciehp_resource_sort_and_combine(head);
 450
 451         if (rc)
 452                 return NULL;
 453
 454         node = *head;
 455
 456         while (node->next) {
 457                 prevnode = node;
 458                 node = node->next;
 459                 kfree(prevnode);
 460         }
 461
 462         if (node->length < alignment) {
 463                 kfree(node);
 464                 return NULL;
 465         }
 466
 467         if (node->base & (alignment - 1)) {
 468                 /* Short circuit if adjusted size is too small */
 469                 temp_dword = (node->base | (alignment-1)) + 1;
 470                 if ((node->length - (temp_dword - node->base)) < alignment) {
 471                         kfree(node);
 472                         return NULL;
 473                 }
 474
 475                 node->length -= (temp_dword - node->base);
 476                 node->base = temp_dword;
 477         }
 478
 479         if (node->length & (alignment - 1)) {
 480                 /* There's stuff in use after this node */
 481                 kfree(node);
 482                 return NULL;
 483         }
 484
 485         return node;
 486 }
 487
 488
 489 /*
 490  * get_io_resource
 491  *
 492  * this function sorts the resource list by size and then
 493  * returns the first node of "size" length that is not in the
 494  * ISA aliasing window.  If it finds a node larger than "size"
 495  * it will split it up.
 496  *
 497  * size must be a power of two.
 498  */
 499 static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size)
 500 {
 501         struct pci_resource *prevnode;
 502         struct pci_resource *node;
 503         struct pci_resource *split_node = NULL;
 504         u32 temp_dword;
 505
 506         if (!(*head))
 507                 return NULL;
 508
 509         if ( pciehp_resource_sort_and_combine(head) )
 510                 return NULL;
 511
 512         if ( sort_by_size(head) )
 513                 return NULL;
 514
 515         for (node = *head; node; node = node->next) {
 516                 if (node->length < size)
 517                         continue;
 518
 519                 if (node->base & (size - 1)) {
 520                         /* this one isn't base aligned properly
 521                            so we'll make a new entry and split it up */
 522                         temp_dword = (node->base | (size-1)) + 1;
 523
 524                         /*/ Short circuit if adjusted size is too small */
 525                         if ((node->length - (temp_dword - node->base)) < size)
 526                                 continue;
 527
 528                         split_node = kmalloc(sizeof(struct pci_resource),
 529                                                 GFP_KERNEL);
 530
 531                         if (!split_node)
 532                                 return NULL;
 533
 534                         split_node->base = node->base;
 535                         split_node->length = temp_dword - node->base;
 536                         node->base = temp_dword;
 537                         node->length -= split_node->length;
 538
 539                         /* Put it in the list */
 540                         split_node->next = node->next;
 541                         node->next = split_node;
 542                 } /* End of non-aligned base */
 543
 544                 /* Don't need to check if too small since we already did */
 545                 if (node->length > size) {
 546                         /* this one is longer than we need
 547                            so we'll make a new entry and split it up */
 548                         split_node = kmalloc(sizeof(struct pci_resource),
 549                                                 GFP_KERNEL);
 550
 551                         if (!split_node)
 552                                 return NULL;
 553
 554                         split_node->base = node->base + size;
 555                         split_node->length = node->length - size;
 556                         node->length = size;
 557
 558                         /* Put it in the list */
 559                         split_node->next = node->next;
 560                         node->next = split_node;
 561                 }  /* End of too big on top end */
 562
 563                 /* For IO make sure it's not in the ISA aliasing space */
 564                 if (node->base & 0x300L)
 565                         continue;
 566
 567                 /* If we got here, then it is the right size
 568                    Now take it out of the list */
 569                 if (*head == node) {
 570                         *head = node->next;
 571                 } else {
 572                         prevnode = *head;
 573                         while (prevnode->next != node)
 574                                 prevnode = prevnode->next;
 575
 576                         prevnode->next = node->next;
 577                 }
 578                 node->next = NULL;
 579                 /* Stop looping */
 580                 break;
 581         }
 582
 583         return node;
 584 }
 585
 586
 587 /*
 588  * get_max_resource
 589  *
 590  * Gets the largest node that is at least "size" big from the
 591  * list pointed to by head.  It aligns the node on top and bottom
 592  * to "size" alignment before returning it.
 593  * J.I. modified to put max size limits of; 64M->32M->16M->8M->4M->1M
 594  *  This is needed to avoid allocating entire ACPI _CRS res to one child bridge/slot.
 595  */
 596 static struct pci_resource *get_max_resource(struct pci_resource **head, u32 size)
 597 {
 598         struct pci_resource *max;
 599         struct pci_resource *temp;
 600         struct pci_resource *split_node;
 601         u32 temp_dword;
 602         u32 max_size[] = { 0x4000000, 0x2000000, 0x1000000, 0x0800000, 0x0400000, 0x0200000, 0x0100000, 0x00 };
 603         int i;
 604
 605         if (!(*head))
 606                 return NULL;
 607
 608         if (pciehp_resource_sort_and_combine(head))
 609                 return NULL;
 610
 611         if (sort_by_max_size(head))
 612                 return NULL;
 613
 614         for (max = *head;max; max = max->next) {
 615
 616                 /* If not big enough we could probably just bail,
 617                    instead we'll continue to the next. */
 618                 if (max->length < size)
 619                         continue;
 620
 621                 if (max->base & (size - 1)) {
 622                         /* this one isn't base aligned properly
 623                            so we'll make a new entry and split it up */
 624                         temp_dword = (max->base | (size-1)) + 1;
 625
 626                         /* Short circuit if adjusted size is too small */
 627                         if ((max->length - (temp_dword - max->base)) < size)
 628                                 continue;
 629
 630                         split_node = kmalloc(sizeof(struct pci_resource),
 631                                                 GFP_KERNEL);
 632
 633                         if (!split_node)
 634                                 return NULL;
 635
 636                         split_node->base = max->base;
 637                         split_node->length = temp_dword - max->base;
 638                         max->base = temp_dword;
 639                         max->length -= split_node->length;
 640
 641                         /* Put it next in the list */
 642                         split_node->next = max->next;
 643                         max->next = split_node;
 644                 }
 645
 646                 if ((max->base + max->length) & (size - 1)) {
 647                         /* this one isn't end aligned properly at the top
 648                            so we'll make a new entry and split it up */
 649                         split_node = kmalloc(sizeof(struct pci_resource),
 650                                                 GFP_KERNEL);
 651
 652                         if (!split_node)
 653                                 return NULL;
 654                         temp_dword = ((max->base + max->length) & ~(size - 1));
 655                         split_node->base = temp_dword;
 656                         split_node->length = max->length + max->base
 657                                              - split_node->base;
 658                         max->length -= split_node->length;
 659
 660                         /* Put it in the list */
 661                         split_node->next = max->next;
 662                         max->next = split_node;
 663                 }
 664
 665                 /* Make sure it didn't shrink too much when we aligned it */
 666                 if (max->length < size)
 667                         continue;
 668
 669                 for ( i = 0; max_size[i] > size; i++) {
 670                         if (max->length > max_size[i]) {
 671                                 split_node = kmalloc(sizeof(struct pci_resource),
 672                                                         GFP_KERNEL);
 673                                 if (!split_node)
 674                                         break;  /* return NULL; */
 675                                 split_node->base = max->base + max_size[i];
 676                                 split_node->length = max->length - max_size[i];
 677                                 max->length = max_size[i];
 678                                 /* Put it next in the list */
 679                                 split_node->next = max->next;
 680                                 max->next = split_node;
 681                                 break;
 682                         }
 683                 }
 684
 685                 /* Now take it out of the list */
 686                 temp = (struct pci_resource*) *head;
 687                 if (temp == max) {
 688                         *head = max->next;
 689                 } else {
 690                         while (temp && temp->next != max) {
 691                                 temp = temp->next;
 692                         }
 693
 694                         temp->next = max->next;
 695                 }
 696
 697                 max->next = NULL;
 698                 return max;
 699         }
 700
 701         /* If we get here, we couldn't find one */
 702         return NULL;
 703 }
 704
 705
 706 /*
 707  * get_resource
 708  *
 709  * this function sorts the resource list by size and then
 710  * returns the first node of "size" length.  If it finds a node
 711  * larger than "size" it will split it up.
 712  *
 713  * size must be a power of two.
 714  */
 715 static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
 716 {
 717         struct pci_resource *prevnode;
 718         struct pci_resource *node;
 719         struct pci_resource *split_node;
 720         u32 temp_dword;
 721
 722         if (!(*head))
 723                 return NULL;
 724
 725         if ( pciehp_resource_sort_and_combine(head) )
 726                 return NULL;
 727
 728         if ( sort_by_size(head) )
 729                 return NULL;
 730
 731         for (node = *head; node; node = node->next) {
 732                 dbg("%s: req_size =0x%x node=%p, base=0x%x, length=0x%x\n",
 733                     __FUNCTION__, size, node, node->base, node->length);
 734                 if (node->length < size)
 735                         continue;
 736
 737                 if (node->base & (size - 1)) {
 738                         dbg("%s: not aligned\n", __FUNCTION__);
 739                         /* this one isn't base aligned properly
 740                            so we'll make a new entry and split it up */
 741                         temp_dword = (node->base | (size-1)) + 1;
 742
 743                         /* Short circuit if adjusted size is too small */
 744                         if ((node->length - (temp_dword - node->base)) < size)
 745                                 continue;
 746
 747                         split_node = kmalloc(sizeof(struct pci_resource),
 748                                                 GFP_KERNEL);
 749
 750                         if (!split_node)
 751                                 return NULL;
 752
 753                         split_node->base = node->base;
 754                         split_node->length = temp_dword - node->base;
 755                         node->base = temp_dword;
 756                         node->length -= split_node->length;
 757
 758                         /* Put it in the list */
 759                         split_node->next = node->next;
 760                         node->next = split_node;
 761                 } /* End of non-aligned base */
 762
 763                 /* Don't need to check if too small since we already did */
 764                 if (node->length > size) {
 765                         dbg("%s: too big\n", __FUNCTION__);
 766                         /* this one is longer than we need
 767                            so we'll make a new entry and split it up */
 768                         split_node = kmalloc(sizeof(struct pci_resource),
 769                                                 GFP_KERNEL);
 770
 771                         if (!split_node)
 772                                 return NULL;
 773
 774                         split_node->base = node->base + size;
 775                         split_node->length = node->length - size;
 776                         node->length = size;
 777
 778                         /* Put it in the list */
 779                         split_node->next = node->next;
 780                         node->next = split_node;
 781                 }  /* End of too big on top end */
 782
 783                 dbg("%s: got one!!!\n", __FUNCTION__);
 784                 /* If we got here, then it is the right size
 785                    Now take it out of the list */
 786                 if (*head == node) {
 787                         *head = node->next;
 788                 } else {
 789                         prevnode = *head;
 790                         while (prevnode->next != node)
 791                                 prevnode = prevnode->next;
 792
 793                         prevnode->next = node->next;
 794                 }
 795                 node->next = NULL;
 796                 /* Stop looping */
 797                 break;
 798         }
 799         return node;
 800 }
 801
 802
 803 /*
 804  * pciehp_resource_sort_and_combine
 805  *
 806  * Sorts all of the nodes in the list in ascending order by
 807  * their base addresses.  Also does garbage collection by
 808  * combining adjacent nodes.
 809  *
 810  * returns 0 if success
 811  */
 812 int pciehp_resource_sort_and_combine(struct pci_resource **head)
 813 {
 814         struct pci_resource *node1;
 815         struct pci_resource *node2;
 816         int out_of_order = 1;
 817
 818         dbg("%s: head = %p, *head = %p\n", __FUNCTION__, head, *head);
 819
 820         if (!(*head))
 821                 return 1;
 822
 823         dbg("*head->next = %p\n",(*head)->next);
 824
 825         if (!(*head)->next)
 826                 return 0;       /* only one item on the list, already sorted! */
 827
 828         dbg("*head->base = 0x%x\n",(*head)->base);
 829         dbg("*head->next->base = 0x%x\n",(*head)->next->base);
 830         while (out_of_order) {
 831                 out_of_order = 0;
 832
 833                 /* Special case for swapping list head */
 834                 if (((*head)->next) &&
 835                     ((*head)->base > (*head)->next->base)) {
 836                         node1 = *head;
 837                         (*head) = (*head)->next;
 838                         node1->next = (*head)->next;
 839                         (*head)->next = node1;
 840                         out_of_order++;
 841                 }
 842
 843                 node1 = (*head);
 844
 845                 while (node1->next && node1->next->next) {
 846                         if (node1->next->base > node1->next->next->base) {
 847                                 out_of_order++;
 848                                 node2 = node1->next;
 849                                 node1->next = node1->next->next;
 850                                 node1 = node1->next;
 851                                 node2->next = node1->next;
 852                                 node1->next = node2;
 853                         } else
 854                                 node1 = node1->next;
 855                 }
 856         }  /* End of out_of_order loop */
 857
 858         node1 = *head;
 859
 860         while (node1 && node1->next) {
 861                 if ((node1->base + node1->length) == node1->next->base) {
 862                         /* Combine */
 863                         dbg("8..\n");
 864                         node1->length += node1->next->length;
 865                         node2 = node1->next;
 866                         node1->next = node1->next->next;
 867                         kfree(node2);
 868                 } else
 869                         node1 = node1->next;
 870         }
 871
 872         return 0;
 873 }
 874
 875
 876 /**
 877  * pciehp_slot_create - Creates a node and adds it to the proper bus.
 878  * @busnumber - bus where new node is to be located
 879  *
 880  * Returns pointer to the new node or NULL if unsuccessful
 881  */
 882 struct pci_func *pciehp_slot_create(u8 busnumber)
 883 {
 884         struct pci_func *new_slot;
 885         struct pci_func *next;
 886         dbg("%s: busnumber %x\n", __FUNCTION__, busnumber);
 887         new_slot = kmalloc(sizeof(struct pci_func), GFP_KERNEL);
 888
 889         if (new_slot == NULL)
 890                 return new_slot;
 891
 892         memset(new_slot, 0, sizeof(struct pci_func));
 893
 894         new_slot->next = NULL;
 895         new_slot->configured = 1;
 896
 897         if (pciehp_slot_list[busnumber] == NULL) {
 898                 pciehp_slot_list[busnumber] = new_slot;
 899         } else {
 900                 next = pciehp_slot_list[busnumber];
 901                 while (next->next != NULL)
 902                         next = next->next;
 903                 next->next = new_slot;
 904         }
 905         return new_slot;
 906 }
 907
 908
 909 /**
 910  * slot_remove - Removes a node from the linked list of slots.
 911  * @old_slot: slot to remove
 912  *
 913  * Returns 0 if successful, !0 otherwise.
 914  */
 915 static int slot_remove(struct pci_func * old_slot)
 916 {
 917         struct pci_func *next;
 918
 919         if (old_slot == NULL)
 920                 return 1;
 921
 922         next = pciehp_slot_list[old_slot->bus];
 923
 924         if (next == NULL)
 925                 return 1;
 926
 927         if (next == old_slot) {
 928                 pciehp_slot_list[old_slot->bus] = old_slot->next;
 929                 pciehp_destroy_board_resources(old_slot);
 930                 kfree(old_slot);
 931                 return 0;
 932         }
 933
 934         while ((next->next != old_slot) && (next->next != NULL)) {
 935                 next = next->next;
 936         }
 937
 938         if (next->next == old_slot) {
 939                 next->next = old_slot->next;
 940                 pciehp_destroy_board_resources(old_slot);
 941                 kfree(old_slot);
 942                 return 0;
 943         } else
 944                 return 2;
 945 }
 946
 947
 948 /**
 949  * bridge_slot_remove - Removes a node from the linked list of slots.
 950  * @bridge: bridge to remove
 951  *
 952  * Returns 0 if successful, !0 otherwise.
 953  */
 954 static int bridge_slot_remove(struct pci_func *bridge)
 955 {
 956         u8 subordinateBus, secondaryBus;
 957         u8 tempBus;
 958         struct pci_func *next;
 959
 960         if (bridge == NULL)
 961                 return 1;
 962
 963         secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
 964         subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
 965
 966         for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
 967                 next = pciehp_slot_list[tempBus];
 968
 969                 while (!slot_remove(next)) {
 970                         next = pciehp_slot_list[tempBus];
 971                 }
 972         }
 973
 974         next = pciehp_slot_list[bridge->bus];
 975
 976         if (next == NULL) {
 977                 return 1;
 978         }
 979
 980         if (next == bridge) {
 981                 pciehp_slot_list[bridge->bus] = bridge->next;
 982                 kfree(bridge);
 983                 return 0;
 984         }
 985
 986         while ((next->next != bridge) && (next->next != NULL)) {
 987                 next = next->next;
 988         }
 989
 990         if (next->next == bridge) {
 991                 next->next = bridge->next;
 992                 kfree(bridge);
 993                 return 0;
 994         } else
 995                 return 2;
 996 }
 997
 998
 999 /**
1000  * pciehp_slot_find - Looks for a node by bus, and device, multiple functions accessed
1001  * @bus: bus to find
1002  * @device: device to find
1003  * @index: is 0 for first function found, 1 for the second...
1004  *
1005  * Returns pointer to the node if successful, %NULL otherwise.
1006  */
1007 struct pci_func *pciehp_slot_find(u8 bus, u8 device, u8 index)
1008 {
1009         int found = -1;
1010         struct pci_func *func;
1011
1012         func = pciehp_slot_list[bus];
1013         dbg("%s: bus %x device %x index %x\n",
1014                 __FUNCTION__, bus, device, index);
1015         if (func != NULL) {
1016                 dbg("%s: func-> bus %x device %x function %x pci_dev %p\n",
1017                         __FUNCTION__, func->bus, func->device, func->function,
1018                         func->pci_dev);
1019         } else
1020                 dbg("%s: func == NULL\n", __FUNCTION__);
1021
1022         if ((func == NULL) || ((func->device == device) && (index == 0)))
1023                 return func;
1024
1025         if (func->device == device)
1026                 found++;
1027
1028         while (func->next != NULL) {
1029                 func = func->next;
1030
1031                 dbg("%s: In while loop, func-> bus %x device %x function %x pci_dev %p\n",
1032                         __FUNCTION__, func->bus, func->device, func->function,
1033                         func->pci_dev);
1034                 if (func->device == device)
1035                         found++;
1036                 dbg("%s: while loop, found %d, index %d\n", __FUNCTION__,
1037                         found, index);
1038
1039                 if ((found == index) || (func->function == index)) {
1040                         dbg("%s: Found bus %x dev %x func %x\n", __FUNCTION__,
1041                                         func->bus, func->device, func->function);
1042                         return func;
1043                 }
1044         }
1045
1046         return NULL;
1047 }
1048
1049 static int is_bridge(struct pci_func * func)
1050 {
1051         /* Check the header type */
1052         if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
1053                 return 1;
1054         else
1055                 return 0;
1056 }
1057
1058
1059 /* The following routines constitute the bulk of the
1060    hotplug controller logic
1061  */
1062
1063 static void set_slot_off(struct controller *ctrl, struct slot * pslot)
1064 {
1065         /* Wait for exclusive access to hardware */
1066         down(&ctrl->crit_sect);
1067
1068         /* turn off slot, turn on Amber LED, turn off Green LED if supported*/
1069         if (POWER_CTRL(ctrl->ctrlcap)) {
1070                 if (pslot->hpc_ops->power_off_slot(pslot)) {
1071                         err("%s: Issue of Slot Power Off command failed\n", __FUNCTION__);
1072                         up(&ctrl->crit_sect);
1073                         return;
1074                 }
1075                 wait_for_ctrl_irq (ctrl);
1076         }
1077
1078         if (PWR_LED(ctrl->ctrlcap)) {
1079                 pslot->hpc_ops->green_led_off(pslot);
1080                 wait_for_ctrl_irq (ctrl);
1081         }
1082
1083         if (ATTN_LED(ctrl->ctrlcap)) {
1084                 if (pslot->hpc_ops->set_attention_status(pslot, 1)) {
1085                         err("%s: Issue of Set Attention Led command failed\n", __FUNCTION__);
1086                         up(&ctrl->crit_sect);
1087                         return;
1088                 }
1089                 wait_for_ctrl_irq (ctrl);
1090         }
1091
1092         /* Done with exclusive hardware access */
1093         up(&ctrl->crit_sect);
1094 }
1095
1096 /**
1097  * board_added - Called after a board has been added to the system.
1098  *
1099  * Turns power on for the board
1100  * Configures board
1101  *
1102  */
1103 static u32 board_added(struct pci_func * func, struct controller * ctrl)
1104 {
1105         u8 hp_slot;
1106         int index;
1107         u32 temp_register = 0xFFFFFFFF;
1108         u32 rc = 0;
1109         struct pci_func *new_func = NULL;
1110         struct slot *p_slot;
1111         struct resource_lists res_lists;
1112
1113         p_slot = pciehp_find_slot(ctrl, func->device);
1114         hp_slot = func->device - ctrl->slot_device_offset;
1115
1116         dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot);
1117
1118         /* Wait for exclusive access to hardware */
1119         down(&ctrl->crit_sect);
1120
1121         if (POWER_CTRL(ctrl->ctrlcap)) {
1122                 /* Power on slot */
1123                 rc = p_slot->hpc_ops->power_on_slot(p_slot);
1124                 if (rc) {
1125                         up(&ctrl->crit_sect);
1126                         return -1;
1127                 }
1128
1129                 /* Wait for the command to complete */
1130                 wait_for_ctrl_irq (ctrl);
1131         }
1132
1133         if (PWR_LED(ctrl->ctrlcap)) {
1134                 p_slot->hpc_ops->green_led_blink(p_slot);
1135
1136                 /* Wait for the command to complete */
1137                 wait_for_ctrl_irq (ctrl);
1138         }
1139
1140         /* Done with exclusive hardware access */
1141         up(&ctrl->crit_sect);
1142
1143         /* Wait for ~1 second */
1144         dbg("%s: before long_delay\n", __FUNCTION__);
1145         wait_for_ctrl_irq (ctrl);
1146         dbg("%s: afterlong_delay\n", __FUNCTION__);
1147
1148         /*  Check link training status */
1149         rc = p_slot->hpc_ops->check_lnk_status(ctrl);
1150         if (rc) {
1151                 err("%s: Failed to check link status\n", __FUNCTION__);
1152                 set_slot_off(ctrl, p_slot);
1153                 return rc;
1154         }
1155
1156         dbg("%s: func status = %x\n", __FUNCTION__, func->status);
1157
1158         /* Check for a power fault */
1159         if (func->status == 0xFF) {
1160                 /* power fault occurred, but it was benign */
1161                 temp_register = 0xFFFFFFFF;
1162                 dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register);
1163                 rc = POWER_FAILURE;
1164                 func->status = 0;
1165         } else {
1166                 /* Get vendor/device ID u32 */
1167                 rc = pci_bus_read_config_dword (ctrl->pci_dev->subordinate, PCI_DEVFN(func->device, func->function),
1168                         PCI_VENDOR_ID, &temp_register);
1169                 dbg("%s: pci_bus_read_config_dword returns %d\n", __FUNCTION__, rc);
1170                 dbg("%s: temp_register is %x\n", __FUNCTION__, temp_register);
1171
1172                 if (rc != 0) {
1173                         /* Something's wrong here */
1174                         temp_register = 0xFFFFFFFF;
1175                         dbg("%s: temp register set to %x by error\n", __FUNCTION__, temp_register);
1176                 }
1177                 /* Preset return code.  It will be changed later if things go okay. */
1178                 rc = NO_ADAPTER_PRESENT;
1179         }
1180
1181         /* All F's is an empty slot or an invalid board */
1182         if (temp_register != 0xFFFFFFFF) {        /* Check for a board in the slot */
1183                 res_lists.io_head = ctrl->io_head;
1184                 res_lists.mem_head = ctrl->mem_head;
1185                 res_lists.p_mem_head = ctrl->p_mem_head;
1186                 res_lists.bus_head = ctrl->bus_head;
1187                 res_lists.irqs = NULL;
1188
1189                 rc = configure_new_device(ctrl, func, 0, &res_lists, 0, 0);
1190                 dbg("%s: back from configure_new_device\n", __FUNCTION__);
1191
1192                 ctrl->io_head = res_lists.io_head;
1193                 ctrl->mem_head = res_lists.mem_head;
1194                 ctrl->p_mem_head = res_lists.p_mem_head;
1195                 ctrl->bus_head = res_lists.bus_head;
1196
1197                 pciehp_resource_sort_and_combine(&(ctrl->mem_head));
1198                 pciehp_resource_sort_and_combine(&(ctrl->p_mem_head));
1199                 pciehp_resource_sort_and_combine(&(ctrl->io_head));
1200                 pciehp_resource_sort_and_combine(&(ctrl->bus_head));
1201
1202                 if (rc) {
1203                         set_slot_off(ctrl, p_slot);
1204                         return rc;
1205                 }
1206                 pciehp_save_slot_config(ctrl, func);
1207
1208                 func->status = 0;
1209                 func->switch_save = 0x10;
1210                 func->is_a_board = 0x01;
1211
1212                 /* next, we will instantiate the linux pci_dev structures
1213                  * (with appropriate driver notification, if already present)
1214                  */
1215                 index = 0;
1216                 do {
1217                         new_func = pciehp_slot_find(ctrl->slot_bus, func->device, index++);
1218                         if (new_func && !new_func->pci_dev) {
1219                                 dbg("%s:call pci_hp_configure_dev, func %x\n",
1220                                         __FUNCTION__, index);
1221                                 pciehp_configure_device(ctrl, new_func);
1222                         }
1223                 } while (new_func);
1224
1225                 /*
1226                  * Some PCI Express root ports require fixup after hot-plug operation.
1227                  */
1228                 if (pcie_mch_quirk)
1229                         pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
1230
1231                 if (PWR_LED(ctrl->ctrlcap)) {
1232                         /* Wait for exclusive access to hardware */
1233                         down(&ctrl->crit_sect);
1234
1235                         p_slot->hpc_ops->green_led_on(p_slot);
1236
1237                         /* Wait for the command to complete */
1238                         wait_for_ctrl_irq (ctrl);
1239
1240                         /* Done with exclusive hardware access */
1241                         up(&ctrl->crit_sect);
1242                 }
1243         } else {
1244                 set_slot_off(ctrl, p_slot);
1245                 return -1;
1246         }
1247         return 0;
1248 }
1249
1250
1251 /**
1252  * remove_board - Turns off slot and LED's
1253  *
1254  */
1255 static u32 remove_board(struct pci_func *func, struct controller *ctrl)
1256 {
1257         int index;
1258         u8 skip = 0;
1259         u8 device;
1260         u8 hp_slot;
1261         u32 rc;
1262         struct resource_lists res_lists;
1263         struct pci_func *temp_func;
1264         struct slot *p_slot;
1265
1266         if (func == NULL)
1267                 return 1;
1268
1269         if (pciehp_unconfigure_device(func))
1270                 return 1;
1271
1272         device = func->device;
1273
1274         hp_slot = func->device - ctrl->slot_device_offset;
1275         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1276
1277         dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
1278
1279         if ((ctrl->add_support) &&
1280                 !(func->bus_head || func->mem_head || func->p_mem_head || func->io_head)) {
1281                 /* Here we check to see if we've saved any of the board's
1282                  * resources already.  If so, we'll skip the attempt to
1283                  * determine what's being used.
1284                  */
1285                 index = 0;
1286
1287                 temp_func = func;
1288
1289                 while ((temp_func = pciehp_slot_find(temp_func->bus, temp_func->device, index++))) {
1290                         if (temp_func->bus_head || temp_func->mem_head
1291                             || temp_func->p_mem_head || temp_func->io_head) {
1292                                 skip = 1;
1293                                 break;
1294                         }
1295                 }
1296
1297                 if (!skip)
1298                         rc = pciehp_save_used_resources(ctrl, func, DISABLE_CARD);
1299         }
1300         /* Change status to shutdown */
1301         if (func->is_a_board)
1302                 func->status = 0x01;
1303         func->configured = 0;
1304
1305         /* Wait for exclusive access to hardware */
1306         down(&ctrl->crit_sect);
1307
1308         if (POWER_CTRL(ctrl->ctrlcap)) {
1309                 /* power off slot */
1310                 rc = p_slot->hpc_ops->power_off_slot(p_slot);
1311                 if (rc) {
1312                         err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
1313                         up(&ctrl->crit_sect);
1314                         return rc;
1315                 }
1316                 /* Wait for the command to complete */
1317                 wait_for_ctrl_irq (ctrl);
1318         }
1319
1320         if (PWR_LED(ctrl->ctrlcap)) {
1321                 /* turn off Green LED */
1322                 p_slot->hpc_ops->green_led_off(p_slot);
1323
1324                 /* Wait for the command to complete */
1325                 wait_for_ctrl_irq (ctrl);
1326         }
1327
1328         /* Done with exclusive hardware access */
1329         up(&ctrl->crit_sect);
1330
1331         if (ctrl->add_support) {
1332                 while (func) {
1333                         res_lists.io_head = ctrl->io_head;
1334                         res_lists.mem_head = ctrl->mem_head;
1335                         res_lists.p_mem_head = ctrl->p_mem_head;
1336                         res_lists.bus_head = ctrl->bus_head;
1337
1338                         dbg("Returning resources to ctlr lists for (B/D/F) = (%#x/%#x/%#x)\n",
1339                                 func->bus, func->device, func->function);
1340
1341                         pciehp_return_board_resources(func, &res_lists);
1342
1343                         ctrl->io_head = res_lists.io_head;
1344                         ctrl->mem_head = res_lists.mem_head;
1345                         ctrl->p_mem_head = res_lists.p_mem_head;
1346                         ctrl->bus_head = res_lists.bus_head;
1347
1348                         pciehp_resource_sort_and_combine(&(ctrl->mem_head));
1349                         pciehp_resource_sort_and_combine(&(ctrl->p_mem_head));
1350                         pciehp_resource_sort_and_combine(&(ctrl->io_head));
1351                         pciehp_resource_sort_and_combine(&(ctrl->bus_head));
1352
1353                         if (is_bridge(func)) {
1354                                 dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n",
1355                                         ctrl->seg, func->bus, func->device, func->function);
1356                                 bridge_slot_remove(func);
1357                         } else {
1358                                 dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n",
1359                                         ctrl->seg, func->bus, func->device, func->function);
1360                                 slot_remove(func);
1361                         }
1362
1363                         func = pciehp_slot_find(ctrl->slot_bus, device, 0);
1364                 }
1365
1366                 /* Setup slot structure with entry for empty slot */
1367                 func = pciehp_slot_create(ctrl->slot_bus);
1368
1369                 if (func == NULL) {
1370                         return 1;
1371                 }
1372
1373                 func->bus = ctrl->slot_bus;
1374                 func->device = device;
1375                 func->function = 0;
1376                 func->configured = 0;
1377                 func->switch_save = 0x10;
1378                 func->is_a_board = 0;
1379         }
1380
1381         return 0;
1382 }
1383
1384
1385 static void pushbutton_helper_thread(unsigned long data)
1386 {
1387         pushbutton_pending = data;
1388
1389         up(&event_semaphore);
1390 }
1391
1392 /**
1393  * pciehp_pushbutton_thread
1394  *
1395  * Scheduled procedure to handle blocking stuff for the pushbuttons
1396  * Handles all pending events and exits.
1397  *
1398  */
1399 static void pciehp_pushbutton_thread(unsigned long slot)
1400 {
1401         struct slot *p_slot = (struct slot *) slot;
1402         u8 getstatus;
1403
1404         pushbutton_pending = 0;
1405
1406         if (!p_slot) {
1407                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
1408                 return;
1409         }
1410
1411         p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
1412         if (getstatus) {
1413                 p_slot->state = POWEROFF_STATE;
1414                 dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
1415
1416                 pciehp_disable_slot(p_slot);
1417                 p_slot->state = STATIC_STATE;
1418         } else {
1419                 p_slot->state = POWERON_STATE;
1420                 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
1421
1422                 if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
1423                         /* Wait for exclusive access to hardware */
1424                         down(&p_slot->ctrl->crit_sect);
1425
1426                         p_slot->hpc_ops->green_led_off(p_slot);
1427
1428                         /* Wait for the command to complete */
1429                         wait_for_ctrl_irq (p_slot->ctrl);
1430
1431                         /* Done with exclusive hardware access */
1432                         up(&p_slot->ctrl->crit_sect);
1433                 }
1434                 p_slot->state = STATIC_STATE;
1435         }
1436
1437         return;
1438 }
1439
1440 /**
1441  * pciehp_surprise_rm_thread
1442  *
1443  * Scheduled procedure to handle blocking stuff for the surprise removal
1444  * Handles all pending events and exits.
1445  *
1446  */
1447 static void pciehp_surprise_rm_thread(unsigned long slot)
1448 {
1449         struct slot *p_slot = (struct slot *) slot;
1450         u8 getstatus;
1451
1452         surprise_rm_pending = 0;
1453
1454         if (!p_slot) {
1455                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
1456                 return;
1457         }
1458
1459         p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
1460         if (!getstatus) {
1461                 p_slot->state = POWEROFF_STATE;
1462                 dbg("In removing board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
1463
1464                 pciehp_disable_slot(p_slot);
1465                 p_slot->state = STATIC_STATE;
1466         } else {
1467                 p_slot->state = POWERON_STATE;
1468                 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
1469
1470                 if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
1471                         /* Wait for exclusive access to hardware */
1472                         down(&p_slot->ctrl->crit_sect);
1473
1474                         p_slot->hpc_ops->green_led_off(p_slot);
1475
1476                         /* Wait for the command to complete */
1477                         wait_for_ctrl_irq (p_slot->ctrl);
1478
1479                         /* Done with exclusive hardware access */
1480                         up(&p_slot->ctrl->crit_sect);
1481                 }
1482                 p_slot->state = STATIC_STATE;
1483         }
1484
1485         return;
1486 }
1487
1488
1489
1490 /* this is the main worker thread */
1491 static int event_thread(void* data)
1492 {
1493         struct controller *ctrl;
1494         lock_kernel();
1495         daemonize("pciehpd_event");
1496
1497         unlock_kernel();
1498
1499         while (1) {
1500                 dbg("!!!!event_thread sleeping\n");
1501                 down_interruptible (&event_semaphore);
1502                 dbg("event_thread woken finished = %d\n", event_finished);
1503                 if (event_finished || signal_pending(current))
1504                         break;
1505                 /* Do stuff here */
1506                 if (pushbutton_pending)
1507                         pciehp_pushbutton_thread(pushbutton_pending);
1508                 else if (surprise_rm_pending)
1509                         pciehp_surprise_rm_thread(surprise_rm_pending);
1510                 else
1511                         for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next)
1512                                 interrupt_event_handler(ctrl);
1513         }
1514         dbg("event_thread signals exit\n");
1515         up(&event_exit);
1516         return 0;
1517 }
1518
1519 int pciehp_event_start_thread(void)
1520 {
1521         int pid;
1522
1523         /* initialize our semaphores */
1524         init_MUTEX_LOCKED(&event_exit);
1525         event_finished=0;
1526
1527         init_MUTEX_LOCKED(&event_semaphore);
1528         pid = kernel_thread(event_thread, NULL, 0);
1529
1530         if (pid < 0) {
1531                 err ("Can't start up our event thread\n");
1532                 return -1;
1533         }
1534         dbg("Our event thread pid = %d\n", pid);
1535         return 0;
1536 }
1537
1538
1539 void pciehp_event_stop_thread(void)
1540 {
1541         event_finished = 1;
1542         dbg("event_thread finish command given\n");
1543         up(&event_semaphore);
1544         dbg("wait for event_thread to exit\n");
1545         down(&event_exit);
1546 }
1547
1548
1549 static int update_slot_info(struct slot *slot)
1550 {
1551         struct hotplug_slot_info *info;
1552         /* char buffer[SLOT_NAME_SIZE]; */
1553         int result;
1554
1555         info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
1556         if (!info)
1557                 return -ENOMEM;
1558
1559         /* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */
1560
1561         slot->hpc_ops->get_power_status(slot, &(info->power_status));
1562         slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
1563         slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
1564         slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
1565
1566         /* result = pci_hp_change_slot_info(buffer, info); */
1567         result = pci_hp_change_slot_info(slot->hotplug_slot, info);
1568         kfree (info);
1569         return result;
1570 }
1571
1572 static void interrupt_event_handler(struct controller *ctrl)
1573 {
1574         int loop = 0;
1575         int change = 1;
1576         struct pci_func *func;
1577         u8 hp_slot;
1578         u8 getstatus;
1579         struct slot *p_slot;
1580
1581         while (change) {
1582                 change = 0;
1583
1584                 for (loop = 0; loop < 10; loop++) {
1585                         if (ctrl->event_queue[loop].event_type != 0) {
1586                                 hp_slot = ctrl->event_queue[loop].hp_slot;
1587
1588                                 func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
1589
1590                                 p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1591
1592                                 dbg("hp_slot %d, func %p, p_slot %p\n", hp_slot, func, p_slot);
1593
1594                                 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
1595                                         dbg("button cancel\n");
1596                                         del_timer(&p_slot->task_event);
1597
1598                                         switch (p_slot->state) {
1599                                         case BLINKINGOFF_STATE:
1600                                                 /* Wait for exclusive access to hardware */
1601                                                 down(&ctrl->crit_sect);
1602
1603                                                 if (PWR_LED(ctrl->ctrlcap)) {
1604                                                         p_slot->hpc_ops->green_led_on(p_slot);
1605                                                         /* Wait for the command to complete */
1606                                                         wait_for_ctrl_irq (ctrl);
1607                                                 }
1608                                                 if (ATTN_LED(ctrl->ctrlcap)) {
1609                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
1610
1611                                                         /* Wait for the command to complete */
1612                                                         wait_for_ctrl_irq (ctrl);
1613                                                 }
1614                                                 /* Done with exclusive hardware access */
1615                                                 up(&ctrl->crit_sect);
1616                                                 break;
1617                                         case BLINKINGON_STATE:
1618                                                 /* Wait for exclusive access to hardware */
1619                                                 down(&ctrl->crit_sect);
1620
1621                                                 if (PWR_LED(ctrl->ctrlcap)) {
1622                                                         p_slot->hpc_ops->green_led_off(p_slot);
1623                                                         /* Wait for the command to complete */
1624                                                         wait_for_ctrl_irq (ctrl);
1625                                                 }
1626                                                 if (ATTN_LED(ctrl->ctrlcap)){
1627                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
1628                                                         /* Wait for the command to complete */
1629                                                         wait_for_ctrl_irq (ctrl);
1630                                                 }
1631                                                 /* Done with exclusive hardware access */
1632                                                 up(&ctrl->crit_sect);
1633
1634                                                 break;
1635                                         default:
1636                                                 warn("Not a valid state\n");
1637                                                 return;
1638                                         }
1639                                         info(msg_button_cancel, p_slot->number);
1640                                         p_slot->state = STATIC_STATE;
1641                                 }
1642                                 /* ***********Button Pressed (No action on 1st press...) */
1643                                 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
1644
1645                                         if (ATTN_BUTTN(ctrl->ctrlcap)) {
1646                                                 dbg("Button pressed\n");
1647                                                 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
1648                                                 if (getstatus) {
1649                                                         /* slot is on */
1650                                                         dbg("slot is on\n");
1651                                                         p_slot->state = BLINKINGOFF_STATE;
1652                                                         info(msg_button_off, p_slot->number);
1653                                                 } else {
1654                                                         /* slot is off */
1655                                                         dbg("slot is off\n");
1656                                                         p_slot->state = BLINKINGON_STATE;
1657                                                         info(msg_button_on, p_slot->number);
1658                                                 }
1659
1660                                                 /* Wait for exclusive access to hardware */
1661                                                 down(&ctrl->crit_sect);
1662
1663                                                 /* blink green LED and turn off amber */
1664                                                 if (PWR_LED(ctrl->ctrlcap)) {
1665                                                         p_slot->hpc_ops->green_led_blink(p_slot);
1666                                                         /* Wait for the command to complete */
1667                                                         wait_for_ctrl_irq (ctrl);
1668                                                 }
1669
1670                                                 if (ATTN_LED(ctrl->ctrlcap)) {
1671                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
1672
1673                                                         /* Wait for the command to complete */
1674                                                         wait_for_ctrl_irq (ctrl);
1675                                                 }
1676
1677                                                 /* Done with exclusive hardware access */
1678                                                 up(&ctrl->crit_sect);
1679
1680                                                 init_timer(&p_slot->task_event);
1681                                                 p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
1682                                                 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
1683                                                 p_slot->task_event.data = (unsigned long) p_slot;
1684
1685                                                 dbg("add_timer p_slot = %p\n", (void *) p_slot);
1686                                                 add_timer(&p_slot->task_event);
1687                                         }
1688                                 }
1689                                 /***********POWER FAULT********************/
1690                                 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
1691                                         if (POWER_CTRL(ctrl->ctrlcap)) {
1692                                                 dbg("power fault\n");
1693                                                 /* Wait for exclusive access to hardware */
1694                                                 down(&ctrl->crit_sect);
1695
1696                                                 if (ATTN_LED(ctrl->ctrlcap)) {
1697                                                         p_slot->hpc_ops->set_attention_status(p_slot, 1);
1698                                                         wait_for_ctrl_irq (ctrl);
1699                                                 }
1700
1701                                                 if (PWR_LED(ctrl->ctrlcap)) {
1702                                                         p_slot->hpc_ops->green_led_off(p_slot);
1703                                                         wait_for_ctrl_irq (ctrl);
1704                                                 }
1705
1706                                                 /* Done with exclusive hardware access */
1707                                                 up(&ctrl->crit_sect);
1708                                         }
1709                                 }
1710                                 /***********SURPRISE REMOVAL********************/
1711                                 else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) ||
1712                                         (ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) {
1713                                         if (HP_SUPR_RM(ctrl->ctrlcap)) {
1714                                                 dbg("Surprise Removal\n");
1715                                                 if (p_slot) {
1716                                                         surprise_rm_pending = (unsigned long) p_slot;
1717                                                         up(&event_semaphore);
1718                                                         update_slot_info(p_slot);
1719                                                 }
1720                                         }
1721                                 } else {
1722                                         /* refresh notification */
1723                                         if (p_slot)
1724                                                 update_slot_info(p_slot);
1725                                 }
1726
1727                                 ctrl->event_queue[loop].event_type = 0;
1728
1729                                 change = 1;
1730                         }
1731                 }               /* End of FOR loop */
1732         }
1733 }
1734
1735
1736 int pciehp_enable_slot(struct slot *p_slot)
1737 {
1738         u8 getstatus = 0;
1739         int rc;
1740         struct pci_func *func;
1741
1742         func = pciehp_slot_find(p_slot->bus, p_slot->device, 0);
1743         if (!func) {
1744                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
1745                 return 1;
1746         }
1747
1748         /* Check to see if (latch closed, card present, power off) */
1749         down(&p_slot->ctrl->crit_sect);
1750
1751         rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
1752         if (rc || !getstatus) {
1753                 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
1754                 up(&p_slot->ctrl->crit_sect);
1755                 return 1;
1756         }
1757         if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
1758                 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
1759                 if (rc || getstatus) {
1760                         info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
1761                         up(&p_slot->ctrl->crit_sect);
1762                         return 1;
1763                 }
1764         }
1765
1766         if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
1767                 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
1768                 if (rc || getstatus) {
1769                         info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
1770                         up(&p_slot->ctrl->crit_sect);
1771                         return 1;
1772                 }
1773         }
1774         up(&p_slot->ctrl->crit_sect);
1775
1776         slot_remove(func);
1777
1778         func = pciehp_slot_create(p_slot->bus);
1779         if (func == NULL)
1780                 return 1;
1781
1782         func->bus = p_slot->bus;
1783         func->device = p_slot->device;
1784         func->function = 0;
1785         func->configured = 0;
1786         func->is_a_board = 1;
1787
1788         /* We have to save the presence info for these slots */
1789         p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
1790         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
1791         func->switch_save = !getstatus? 0x10:0;
1792
1793         rc = board_added(func, p_slot->ctrl);
1794         if (rc) {
1795                 if (is_bridge(func))
1796                         bridge_slot_remove(func);
1797                 else
1798                         slot_remove(func);
1799
1800                 /* Setup slot structure with entry for empty slot */
1801                 func = pciehp_slot_create(p_slot->bus);
1802                 if (func == NULL)
1803                         return 1;       /* Out of memory */
1804
1805                 func->bus = p_slot->bus;
1806                 func->device = p_slot->device;
1807                 func->function = 0;
1808                 func->configured = 0;
1809                 func->is_a_board = 1;
1810
1811                 /* We have to save the presence info for these slots */
1812                 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
1813                 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
1814                 func->switch_save = !getstatus? 0x10:0;
1815         }
1816
1817         if (p_slot)
1818                 update_slot_info(p_slot);
1819
1820         return rc;
1821 }
1822
1823
1824 int pciehp_disable_slot(struct slot *p_slot)
1825 {
1826         u8 class_code, header_type, BCR;
1827         u8 index = 0;
1828         u8 getstatus = 0;
1829         u32 rc = 0;
1830         int ret = 0;
1831         unsigned int devfn;
1832         struct pci_bus *pci_bus = p_slot->ctrl->pci_dev->subordinate;
1833         struct pci_func *func;
1834
1835         if (!p_slot->ctrl)
1836                 return 1;
1837
1838         /* Check to see if (latch closed, card present, power on) */
1839         down(&p_slot->ctrl->crit_sect);
1840
1841         if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) {
1842                 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
1843                 if (ret || !getstatus) {
1844                         info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
1845                         up(&p_slot->ctrl->crit_sect);
1846                         return 1;
1847                 }
1848         }
1849
1850         if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
1851                 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
1852                 if (ret || getstatus) {
1853                         info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
1854                         up(&p_slot->ctrl->crit_sect);
1855                         return 1;
1856                 }
1857         }
1858
1859         if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
1860                 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
1861                 if (ret || !getstatus) {
1862                         info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
1863                         up(&p_slot->ctrl->crit_sect);
1864                         return 1;
1865                 }
1866         }
1867
1868         up(&p_slot->ctrl->crit_sect);
1869
1870         func = pciehp_slot_find(p_slot->bus, p_slot->device, index++);
1871
1872         /* Make sure there are no video controllers here
1873          * for all func of p_slot
1874          */
1875         while (func && !rc) {
1876                 pci_bus->number = func->bus;
1877                 devfn = PCI_DEVFN(func->device, func->function);
1878
1879                 /* Check the Class Code */
1880                 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
1881                 if (rc)
1882                         return rc;
1883
1884                 if (class_code == PCI_BASE_CLASS_DISPLAY) {
1885                         /* Display/Video adapter (not supported) */
1886                         rc = REMOVE_NOT_SUPPORTED;
1887                 } else {
1888                         /* See if it's a bridge */
1889                         rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
1890                         if (rc)
1891                                 return rc;
1892
1893                         /* If it's a bridge, check the VGA Enable bit */
1894                         if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
1895                                 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
1896                                 if (rc)
1897                                         return rc;
1898
1899                                 /* If the VGA Enable bit is set, remove isn't supported */
1900                                 if (BCR & PCI_BRIDGE_CTL_VGA) {
1901                                         rc = REMOVE_NOT_SUPPORTED;
1902                                 }
1903                         }
1904                 }
1905
1906                 func = pciehp_slot_find(p_slot->bus, p_slot->device, index++);
1907         }
1908
1909         func = pciehp_slot_find(p_slot->bus, p_slot->device, 0);
1910         if ((func != NULL) && !rc) {
1911                 rc = remove_board(func, p_slot->ctrl);
1912         } else if (!rc)
1913                 rc = 1;
1914
1915         if (p_slot)
1916                 update_slot_info(p_slot);
1917
1918         return rc;
1919 }
1920
1921
1922 /**
1923  * configure_new_device - Configures the PCI header information of one board.
1924  *
1925  * @ctrl: pointer to controller structure
1926  * @func: pointer to function structure
1927  * @behind_bridge: 1 if this is a recursive call, 0 if not
1928  * @resources: pointer to set of resource lists
1929  *
1930  * Returns 0 if success
1931  *
1932  */
1933 static u32 configure_new_device(struct controller * ctrl, struct pci_func * func,
1934         u8 behind_bridge, struct resource_lists * resources, u8 bridge_bus, u8 bridge_dev)
1935 {
1936         u8 temp_byte, function, max_functions, stop_it;
1937         int rc;
1938         u32 ID;
1939         struct pci_func *new_slot;
1940         struct pci_bus lpci_bus, *pci_bus;
1941         int index;
1942
1943         new_slot = func;
1944
1945         dbg("%s\n", __FUNCTION__);
1946         memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
1947         pci_bus = &lpci_bus;
1948         pci_bus->number = func->bus;
1949
1950         /* Check for Multi-function device */
1951         rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
1952         if (rc) {
1953                 dbg("%s: rc = %d\n", __FUNCTION__, rc);
1954                 return rc;
1955         }
1956
1957         if (temp_byte & 0x80)   /* Multi-function device */
1958                 max_functions = 8;
1959         else
1960                 max_functions = 1;
1961
1962         function = 0;
1963
1964         do {
1965                 rc = configure_new_function(ctrl, new_slot, behind_bridge,
1966                                         resources, bridge_bus, bridge_dev);
1967
1968                 if (rc) {
1969                         dbg("configure_new_function failed: %d\n", rc);
1970                         index = 0;
1971
1972                         while (new_slot) {
1973                                 new_slot = pciehp_slot_find(new_slot->bus,
1974                                                 new_slot->device, index++);
1975
1976                                 if (new_slot)
1977                                         pciehp_return_board_resources(new_slot,
1978                                                 resources);
1979                         }
1980
1981                         return rc;
1982                 }
1983
1984                 function++;
1985
1986                 stop_it = 0;
1987
1988                 /*  The following loop skips to the next present function
1989                  *  and creates a board structure
1990                  */
1991
1992                 while ((function < max_functions) && (!stop_it)) {
1993                         pci_bus_read_config_dword(pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
1994
1995                         if (ID == 0xFFFFFFFF) {   /* There's nothing there. */
1996                                 function++;
1997                         } else {  /* There's something there */
1998                                 /* Setup slot structure. */
1999                                 new_slot = pciehp_slot_create(func->bus);
2000
2001                                 if (new_slot == NULL) {
2002                                         /* Out of memory */
2003                                         return 1;
2004                                 }
2005
2006                                 new_slot->bus = func->bus;
2007                                 new_slot->device = func->device;
2008                                 new_slot->function = function;
2009                                 new_slot->is_a_board = 1;
2010                                 new_slot->status = 0;
2011
2012                                 stop_it++;
2013                         }
2014                 }
2015
2016         } while (function < max_functions);
2017         dbg("returning from %s\n", __FUNCTION__);
2018
2019         return 0;
2020 }
2021
2022 /*
2023  * Configuration logic that involves the hotplug data structures and
2024  * their bookkeeping
2025  */
2026
2027 /**
2028  * configure_bridge: fill bridge's registers, either configure or disable it.
2029  */
2030 static int
2031 configure_bridge(struct pci_bus *pci_bus, unsigned int devfn,
2032                         struct pci_resource *mem_node,
2033                         struct pci_resource **hold_mem_node,
2034                         int base_addr, int limit_addr)
2035 {
2036         u16 temp_word;
2037         u32 rc;
2038
2039         if (mem_node) {
2040                 memcpy(*hold_mem_node, mem_node, sizeof(struct pci_resource));
2041                 mem_node->next = NULL;
2042
2043                 /* set Mem base and Limit registers */
2044                 RES_CHECK(mem_node->base, 16);
2045                 temp_word = (u16)(mem_node->base >> 16);
2046                 rc = pci_bus_write_config_word(pci_bus, devfn, base_addr, temp_word);
2047
2048                 RES_CHECK(mem_node->base + mem_node->length - 1, 16);
2049                 temp_word = (u16)((mem_node->base + mem_node->length - 1) >> 16);
2050                 rc = pci_bus_write_config_word(pci_bus, devfn, limit_addr, temp_word);
2051         } else {
2052                 temp_word = 0xFFFF;
2053                 rc = pci_bus_write_config_word(pci_bus, devfn, base_addr, temp_word);
2054
2055                 temp_word = 0x0000;
2056                 rc = pci_bus_write_config_word(pci_bus, devfn, limit_addr, temp_word);
2057
2058                 kfree(*hold_mem_node);
2059                 *hold_mem_node = NULL;
2060         }
2061         return rc;
2062 }
2063
2064 static int
2065 configure_new_bridge(struct controller *ctrl, struct pci_func *func,
2066                 u8 behind_bridge, struct resource_lists *resources,
2067                 struct pci_bus *pci_bus)
2068 {
2069         int cloop;
2070         u8 temp_byte;
2071         u8 device;
2072         u16 temp_word;
2073         u32 rc;
2074         u32 ID;
2075         unsigned int devfn;
2076         struct pci_resource *mem_node;
2077         struct pci_resource *p_mem_node;
2078         struct pci_resource *io_node;
2079         struct pci_resource *bus_node;
2080         struct pci_resource *hold_mem_node;
2081         struct pci_resource *hold_p_mem_node;
2082         struct pci_resource *hold_IO_node;
2083         struct pci_resource *hold_bus_node;
2084         struct irq_mapping irqs;
2085         struct pci_func *new_slot;
2086         struct resource_lists temp_resources;
2087
2088         devfn = PCI_DEVFN(func->device, func->function);
2089
2090         /* set Primary bus */
2091         dbg("set Primary bus = 0x%x\n", func->bus);
2092         rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2093         if (rc)
2094                 return rc;
2095
2096         /* find range of busses to use */
2097         bus_node = get_max_resource(&resources->bus_head, 1L);
2098
2099         /* If we don't have any busses to allocate, we can't continue */
2100         if (!bus_node) {
2101                 err("Got NO bus resource to use\n");
2102                 return -ENOMEM;
2103         }
2104         dbg("Got ranges of buses to use: base:len=0x%x:%x\n", bus_node->base, bus_node->length);
2105
2106         /* set Secondary bus */
2107         temp_byte = (u8)bus_node->base;
2108         dbg("set Secondary bus = 0x%x\n", temp_byte);
2109         rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2110         if (rc)
2111                 return rc;
2112
2113         /* set subordinate bus */
2114         temp_byte = (u8)(bus_node->base + bus_node->length - 1);
2115         dbg("set subordinate bus = 0x%x\n", temp_byte);
2116         rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2117         if (rc)
2118                 return rc;
2119
2120         /* Set HP parameters (Cache Line Size, Latency Timer) */
2121         rc = pciehprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
2122         if (rc)
2123                 return rc;
2124
2125         /* Setup the IO, memory, and prefetchable windows */
2126
2127         io_node = get_max_resource(&(resources->io_head), 0x1000L);
2128         if (io_node) {
2129                 dbg("io_node(base, len, next) (%x, %x, %p)\n", io_node->base,
2130                                 io_node->length, io_node->next);
2131         }
2132
2133         mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
2134         if (mem_node) {
2135                 dbg("mem_node(base, len, next) (%x, %x, %p)\n", mem_node->base,
2136                                 mem_node->length, mem_node->next);
2137         }
2138
2139         if (resources->p_mem_head)
2140                 p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000L);
2141         else {
2142                 /*
2143                  * In some platform implementation, MEM and PMEM are not
2144                  *  distinguished, and hence ACPI _CRS has only MEM entries
2145                  *  for both MEM and PMEM.
2146                  */
2147                 dbg("using MEM for PMEM\n");
2148                 p_mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
2149         }
2150         if (p_mem_node) {
2151                 dbg("p_mem_node(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
2152                                 p_mem_node->length, p_mem_node->next);
2153         }
2154
2155         /* set up the IRQ info */
2156         if (!resources->irqs) {
2157                 irqs.barber_pole = 0;
2158                 irqs.interrupt[0] = 0;
2159                 irqs.interrupt[1] = 0;
2160                 irqs.interrupt[2] = 0;
2161                 irqs.interrupt[3] = 0;
2162                 irqs.valid_INT = 0;
2163         } else {
2164                 irqs.barber_pole = resources->irqs->barber_pole;
2165                 irqs.interrupt[0] = resources->irqs->interrupt[0];
2166                 irqs.interrupt[1] = resources->irqs->interrupt[1];
2167                 irqs.interrupt[2] = resources->irqs->interrupt[2];
2168                 irqs.interrupt[3] = resources->irqs->interrupt[3];
2169                 irqs.valid_INT = resources->irqs->valid_INT;
2170         }
2171
2172         /* set up resource lists that are now aligned on top and bottom
2173          * for anything behind the bridge.
2174          */
2175         temp_resources.bus_head = bus_node;
2176         temp_resources.io_head = io_node;
2177         temp_resources.mem_head = mem_node;
2178         temp_resources.p_mem_head = p_mem_node;
2179         temp_resources.irqs = &irqs;
2180
2181         /* Make copies of the nodes we are going to pass down so that
2182          * if there is a problem,we can just use these to free resources
2183          */
2184         hold_bus_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2185         hold_IO_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2186         hold_mem_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2187         hold_p_mem_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2188
2189         if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2190                 kfree(hold_bus_node);
2191                 kfree(hold_IO_node);
2192                 kfree(hold_mem_node);
2193                 kfree(hold_p_mem_node);
2194
2195                 return 1;
2196         }
2197
2198         memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2199
2200         bus_node->base += 1;
2201         bus_node->length -= 1;
2202         bus_node->next = NULL;
2203
2204         /* If we have IO resources copy them and fill in the bridge's
2205          * IO range registers
2206          */
2207         if (io_node) {
2208                 memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2209                 io_node->next = NULL;
2210
2211                 /* set IO base and Limit registers */
2212                 RES_CHECK(io_node->base, 8);
2213                 temp_byte = (u8)(io_node->base >> 8);
2214                 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2215
2216                 RES_CHECK(io_node->base + io_node->length - 1, 8);
2217                 temp_byte = (u8)((io_node->base + io_node->length - 1) >> 8);
2218                 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2219         } else {
2220                 kfree(hold_IO_node);
2221                 hold_IO_node = NULL;
2222         }
2223
2224         /* If we have memory resources copy them and fill in the bridge's
2225          * memory range registers.  Otherwise, fill in the range
2226          * registers with values that disable them.
2227          */
2228         rc = configure_bridge(pci_bus, devfn, mem_node, &hold_mem_node,
2229                                 PCI_MEMORY_BASE, PCI_MEMORY_LIMIT);
2230
2231         /* If we have prefetchable memory resources copy them and
2232          * fill in the bridge's memory range registers.  Otherwise,
2233          * fill in the range registers with values that disable them.
2234          */
2235         rc = configure_bridge(pci_bus, devfn, p_mem_node, &hold_p_mem_node,
2236                                 PCI_PREF_MEMORY_BASE, PCI_PREF_MEMORY_LIMIT);
2237
2238         /* Adjust this to compensate for extra adjustment in first loop */
2239         irqs.barber_pole--;
2240
2241         rc = 0;
2242
2243         /* Here we actually find the devices and configure them */
2244         for (device = 0; (device <= 0x1F) && !rc; device++) {
2245                 irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2246
2247                 ID = 0xFFFFFFFF;
2248                 pci_bus->number = hold_bus_node->base;
2249                 pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);
2250                 pci_bus->number = func->bus;
2251
2252                 if (ID != 0xFFFFFFFF) {   /*  device Present */
2253                         /* Setup slot structure. */
2254                         new_slot = pciehp_slot_create(hold_bus_node->base);
2255
2256                         if (new_slot == NULL) {
2257                                 /* Out of memory */
2258                                 rc = -ENOMEM;
2259                                 continue;
2260                         }
2261
2262                         new_slot->bus = hold_bus_node->base;
2263                         new_slot->device = device;
2264                         new_slot->function = 0;
2265                         new_slot->is_a_board = 1;
2266                         new_slot->status = 0;
2267
2268                         rc = configure_new_device(ctrl, new_slot, 1,
2269                                         &temp_resources, func->bus,
2270                                         func->device);
2271                         dbg("configure_new_device rc=0x%x\n",rc);
2272                 }       /* End of IF (device in slot?) */
2273         }               /* End of FOR loop */
2274
2275         if (rc) {
2276                 pciehp_destroy_resource_list(&temp_resources);
2277
2278                 return_resource(&(resources->bus_head), hold_bus_node);
2279                 return_resource(&(resources->io_head), hold_IO_node);
2280                 return_resource(&(resources->mem_head), hold_mem_node);
2281                 return_resource(&(resources->p_mem_head), hold_p_mem_node);
2282                 return(rc);
2283         }
2284
2285         /* save the interrupt routing information */
2286         if (resources->irqs) {
2287                 resources->irqs->interrupt[0] = irqs.interrupt[0];
2288                 resources->irqs->interrupt[1] = irqs.interrupt[1];
2289                 resources->irqs->interrupt[2] = irqs.interrupt[2];
2290                 resources->irqs->interrupt[3] = irqs.interrupt[3];
2291                 resources->irqs->valid_INT = irqs.valid_INT;
2292         } else if (!behind_bridge) {
2293                 /* We need to hook up the interrupts here */
2294                 for (cloop = 0; cloop < 4; cloop++) {
2295                         if (irqs.valid_INT & (0x01 << cloop)) {
2296                                 rc = pciehp_set_irq(func->bus, func->device,
2297                                                         0x0A + cloop, irqs.interrupt[cloop]);
2298                                 if (rc) {
2299                                         pciehp_destroy_resource_list (&temp_resources);
2300                                         return_resource(&(resources->bus_head), hold_bus_node);
2301                                         return_resource(&(resources->io_head), hold_IO_node);
2302                                         return_resource(&(resources->mem_head), hold_mem_node);
2303                                         return_resource(&(resources->p_mem_head), hold_p_mem_node);
2304                                         return rc;
2305                                 }
2306                         }
2307                 }       /* end of for loop */
2308         }
2309
2310         /* Return unused bus resources
2311          * First use the temporary node to store information for the board
2312          */
2313         if (hold_bus_node && bus_node && temp_resources.bus_head) {
2314                 hold_bus_node->length = bus_node->base - hold_bus_node->base;
2315
2316                 hold_bus_node->next = func->bus_head;
2317                 func->bus_head = hold_bus_node;
2318
2319                 temp_byte = (u8)(temp_resources.bus_head->base - 1);
2320
2321                 /* set subordinate bus */
2322                 dbg("re-set subordinate bus = 0x%x\n", temp_byte);
2323                 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2324
2325                 if (temp_resources.bus_head->length == 0) {
2326                         kfree(temp_resources.bus_head);
2327                         temp_resources.bus_head = NULL;
2328                 } else {
2329                         dbg("return bus res of b:d(0x%x:%x) base:len(0x%x:%x)\n",
2330                                 func->bus, func->device, temp_resources.bus_head->base, temp_resources.bus_head->length);
2331                         return_resource(&(resources->bus_head), temp_resources.bus_head);
2332                 }
2333         }
2334
2335         /* If we have IO space available and there is some left,
2336          * return the unused portion
2337          */
2338         if (hold_IO_node && temp_resources.io_head) {
2339                 io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2340                                                         &hold_IO_node, 0x1000);
2341
2342                 /* Check if we were able to split something off */
2343                 if (io_node) {
2344                         hold_IO_node->base = io_node->base + io_node->length;
2345
2346                         RES_CHECK(hold_IO_node->base, 8);
2347                         temp_byte = (u8)((hold_IO_node->base) >> 8);
2348                         rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2349
2350                         return_resource(&(resources->io_head), io_node);
2351                 }
2352
2353                 io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2354
2355                 /*  Check if we were able to split something off */
2356                 if (io_node) {
2357                         /* First use the temporary node to store information for the board */
2358                         hold_IO_node->length = io_node->base - hold_IO_node->base;
2359
2360                         /* If we used any, add it to the board's list */
2361                         if (hold_IO_node->length) {
2362                                 hold_IO_node->next = func->io_head;
2363                                 func->io_head = hold_IO_node;
2364
2365                                 RES_CHECK(io_node->base - 1, 8);
2366                                 temp_byte = (u8)((io_node->base - 1) >> 8);
2367                                 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2368
2369                                 return_resource(&(resources->io_head), io_node);
2370                         } else {
2371                                 /* it doesn't need any IO */
2372                                 temp_byte = 0x00;
2373                                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2374
2375                                 return_resource(&(resources->io_head), io_node);
2376                                 kfree(hold_IO_node);
2377                         }
2378                 } else {
2379                         /* it used most of the range */
2380                         hold_IO_node->next = func->io_head;
2381                         func->io_head = hold_IO_node;
2382                 }
2383         } else if (hold_IO_node) {
2384                 /* it used the whole range */
2385                 hold_IO_node->next = func->io_head;
2386                 func->io_head = hold_IO_node;
2387         }
2388
2389         /* If we have memory space available and there is some left,
2390          * return the unused portion
2391          */
2392         if (hold_mem_node && temp_resources.mem_head) {
2393                 mem_node = do_pre_bridge_resource_split(&(temp_resources.mem_head), &hold_mem_node, 0x100000L);
2394
2395                 /* Check if we were able to split something off */
2396                 if (mem_node) {
2397                         hold_mem_node->base = mem_node->base + mem_node->length;
2398
2399                         RES_CHECK(hold_mem_node->base, 16);
2400                         temp_word = (u16)((hold_mem_node->base) >> 16);
2401                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2402
2403                         return_resource(&(resources->mem_head), mem_node);
2404                 }
2405
2406                 mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000L);
2407
2408                 /* Check if we were able to split something off */
2409                 if (mem_node) {
2410                         /* First use the temporary node to store information for the board */
2411                         hold_mem_node->length = mem_node->base - hold_mem_node->base;
2412
2413                         if (hold_mem_node->length) {
2414                                 hold_mem_node->next = func->mem_head;
2415                                 func->mem_head = hold_mem_node;
2416
2417                                 /* configure end address */
2418                                 RES_CHECK(mem_node->base - 1, 16);
2419                                 temp_word = (u16)((mem_node->base - 1) >> 16);
2420                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2421
2422                                 /* Return unused resources to the pool */
2423                                 return_resource(&(resources->mem_head), mem_node);
2424                         } else {
2425                                 /* it doesn't need any Mem */
2426                                 temp_word = 0x0000;
2427                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2428
2429                                 return_resource(&(resources->mem_head), mem_node);
2430                                 kfree(hold_mem_node);
2431                         }
2432                 } else {
2433                         /* it used most of the range */
2434                         hold_mem_node->next = func->mem_head;
2435                         func->mem_head = hold_mem_node;
2436                 }
2437         } else if (hold_mem_node) {
2438                 /* it used the whole range */
2439                 hold_mem_node->next = func->mem_head;
2440                 func->mem_head = hold_mem_node;
2441         }
2442
2443         /* If we have prefetchable memory space available and there is some
2444          * left at the end, return the unused portion
2445          */
2446         if (hold_p_mem_node && temp_resources.p_mem_head) {
2447                 p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2448                                                                 &hold_p_mem_node, 0x100000L);
2449
2450                 /* Check if we were able to split something off */
2451                 if (p_mem_node) {
2452                         hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2453
2454                         RES_CHECK(hold_p_mem_node->base, 16);
2455                         temp_word = (u16)((hold_p_mem_node->base) >> 16);
2456                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2457
2458                         return_resource(&(resources->p_mem_head), p_mem_node);
2459                 }
2460
2461                 p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000L);
2462
2463                 /* Check if we were able to split something off */
2464                 if (p_mem_node) {
2465                         /* First use the temporary node to store information for the board */
2466                         hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2467
2468                         /* If we used any, add it to the board's list */
2469                         if (hold_p_mem_node->length) {
2470                                 hold_p_mem_node->next = func->p_mem_head;
2471                                 func->p_mem_head = hold_p_mem_node;
2472
2473                                 RES_CHECK(p_mem_node->base - 1, 16);
2474                                 temp_word = (u16)((p_mem_node->base - 1) >> 16);
2475                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2476
2477                                 return_resource(&(resources->p_mem_head), p_mem_node);
2478                         } else {
2479                                 /* it doesn't need any PMem */
2480                                 temp_word = 0x0000;
2481                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2482
2483                                 return_resource(&(resources->p_mem_head), p_mem_node);
2484                                 kfree(hold_p_mem_node);
2485                         }
2486                 } else {
2487                         /* it used the most of the range */
2488                         hold_p_mem_node->next = func->p_mem_head;
2489                         func->p_mem_head = hold_p_mem_node;
2490                 }
2491         } else if (hold_p_mem_node) {
2492                 /* it used the whole range */
2493                 hold_p_mem_node->next = func->p_mem_head;
2494                 func->p_mem_head = hold_p_mem_node;
2495         }
2496
2497         /* We should be configuring an IRQ and the bridge's base address
2498          * registers if it needs them.  Although we have never seen such
2499          * a device
2500          */
2501
2502         pciehprm_enable_card(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
2503
2504         dbg("PCI Bridge Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, func->device, func->function);
2505
2506         return rc;
2507 }
2508
2509 /**
2510  * configure_new_function - Configures the PCI header information of one device
2511  *
2512  * @ctrl: pointer to controller structure
2513  * @func: pointer to function structure
2514  * @behind_bridge: 1 if this is a recursive call, 0 if not
2515  * @resources: pointer to set of resource lists
2516  *
2517  * Calls itself recursively for bridged devices.
2518  * Returns 0 if success
2519  *
2520  */
2521 static int
2522 configure_new_function(struct controller *ctrl, struct pci_func *func,
2523                 u8 behind_bridge, struct resource_lists *resources,
2524                 u8 bridge_bus, u8 bridge_dev)
2525 {
2526         int cloop;
2527         u8 temp_byte;
2528         u8 class_code;
2529         u16 temp_word;
2530         u32 rc;
2531         u32 temp_register;
2532         u32 base;
2533         unsigned int devfn;
2534         struct pci_resource *mem_node;
2535         struct pci_resource *io_node;
2536         struct pci_bus lpci_bus, *pci_bus;
2537
2538         memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
2539         pci_bus = &lpci_bus;
2540         pci_bus->number = func->bus;
2541         devfn = PCI_DEVFN(func->device, func->function);
2542
2543         /* Check for Bridge */
2544         rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2545         if (rc)
2546                 return rc;
2547         dbg("%s: bus %x dev %x func %x temp_byte = %x\n", __FUNCTION__,
2548                 func->bus, func->device, func->function, temp_byte);
2549
2550         if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */
2551                 rc = configure_new_bridge(ctrl, func, behind_bridge, resources,
2552                                                 pci_bus);
2553
2554                 if (rc)
2555                         return rc;
2556         } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2557                 /* Standard device */
2558                 u64     base64;
2559                 rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
2560
2561                 if (class_code == PCI_BASE_CLASS_DISPLAY)
2562                         return DEVICE_TYPE_NOT_SUPPORTED;
2563
2564                 /* Figure out IO and memory needs */
2565                 for (cloop = PCI_BASE_ADDRESS_0; cloop <= PCI_BASE_ADDRESS_5; cloop += 4) {
2566                         temp_register = 0xFFFFFFFF;
2567
2568                         rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
2569                         rc = pci_bus_read_config_dword(pci_bus, devfn, cloop, &temp_register);
2570                         dbg("Bar[%x]=0x%x on bus:dev:func(0x%x:%x:%x)\n", cloop, temp_register,
2571                                 func->bus, func->device, func->function);
2572
2573                         if (!temp_register)
2574                                 continue;
2575
2576                         base64 = 0L;
2577                         if (temp_register & PCI_BASE_ADDRESS_SPACE_IO) {
2578                                 /* Map IO */
2579
2580                                 /* set base = amount of IO space */
2581                                 base = temp_register & 0xFFFFFFFC;
2582                                 base = ~base + 1;
2583
2584                                 dbg("NEED IO length(0x%x)\n", base);
2585                                 io_node = get_io_resource(&(resources->io_head),(ulong)base);
2586
2587                                 /* allocate the resource to the board */
2588                                 if (io_node) {
2589                                         dbg("Got IO base=0x%x(length=0x%x)\n", io_node->base, io_node->length);
2590                                         base = (u32)io_node->base;
2591                                         io_node->next = func->io_head;
2592                                         func->io_head = io_node;
2593                                 } else {
2594                                         err("Got NO IO resource(length=0x%x)\n", base);
2595                                         return -ENOMEM;
2596                                 }
2597                         } else {        /* map MEM */
2598                                 int prefetchable = 1;
2599                                 struct pci_resource **res_node = &func->p_mem_head;
2600                                 char *res_type_str = "PMEM";
2601                                 u32     temp_register2;
2602
2603                                 if (!(temp_register & PCI_BASE_ADDRESS_MEM_PREFETCH)) {
2604                                         prefetchable = 0;
2605                                         res_node = &func->mem_head;
2606                                         res_type_str++;
2607                                 }
2608
2609                                 base = temp_register & 0xFFFFFFF0;
2610                                 base = ~base + 1;
2611
2612                                 switch (temp_register & PCI_BASE_ADDRESS_MEM_TYPE_MASK) {
2613                                 case PCI_BASE_ADDRESS_MEM_TYPE_32:
2614                                         dbg("NEED 32 %s bar=0x%x(length=0x%x)\n", res_type_str, temp_register, base);
2615
2616                                         if (prefetchable && resources->p_mem_head)
2617                                                 mem_node=get_resource(&(resources->p_mem_head), (ulong)base);
2618                                         else {
2619                                                 if (prefetchable)
2620                                                         dbg("using MEM for PMEM\n");
2621                                                 mem_node = get_resource(&(resources->mem_head), (ulong)base);
2622                                         }
2623
2624                                         /* allocate the resource to the board */
2625                                         if (mem_node) {
2626                                                 base = (u32)mem_node->base;
2627                                                 mem_node->next = *res_node;
2628                                                 *res_node = mem_node;
2629                                                 dbg("Got 32 %s base=0x%x(length=0x%x)\n", res_type_str, mem_node->base,
2630                                                         mem_node->length);
2631                                         } else {
2632                                                 err("Got NO 32 %s resource(length=0x%x)\n", res_type_str, base);
2633                                                 return -ENOMEM;
2634                                         }
2635                                         break;
2636                                 case PCI_BASE_ADDRESS_MEM_TYPE_64:
2637                                         rc = pci_bus_read_config_dword(pci_bus, devfn, cloop+4, &temp_register2);
2638                                         dbg("NEED 64 %s bar=0x%x:%x(length=0x%x)\n", res_type_str, temp_register2,
2639                                                 temp_register, base);
2640
2641                                         if (prefetchable && resources->p_mem_head)
2642                                                 mem_node = get_resource(&(resources->p_mem_head), (ulong)base);
2643                                         else {
2644                                                 if (prefetchable)
2645                                                         dbg("using MEM for PMEM\n");
2646                                                 mem_node = get_resource(&(resources->mem_head), (ulong)base);
2647                                         }
2648
2649                                         /* allocate the resource to the board */
2650                                         if (mem_node) {
2651                                                 base64 = mem_node->base;
2652                                                 mem_node->next = *res_node;
2653                                                 *res_node = mem_node;
2654                                                 dbg("Got 64 %s base=0x%x:%x(length=%x)\n", res_type_str, (u32)(base64 >> 32),
2655                                                         (u32)base64, mem_node->length);
2656                                         } else {
2657                                                 err("Got NO 64 %s resource(length=0x%x)\n", res_type_str, base);
2658                                                 return -ENOMEM;
2659                                         }
2660                                         break;
2661                                 default:
2662                                         dbg("reserved BAR type=0x%x\n", temp_register);
2663                                         break;
2664                                 }
2665
2666                         }
2667
2668                         if (base64) {
2669                                 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, (u32)base64);
2670                                 cloop += 4;
2671                                 base64 >>= 32;
2672
2673                                 if (base64) {
2674                                         dbg("%s: high dword of base64(0x%x) set to 0\n", __FUNCTION__, (u32)base64);
2675                                         base64 = 0x0L;
2676                                 }
2677
2678                                 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, (u32)base64);
2679                         } else {
2680                                 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2681                         }
2682                 }               /* End of base register loop */
2683
2684                 /* disable ROM base Address */
2685                 temp_word = 0x00L;
2686                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_ROM_ADDRESS, temp_word);
2687
2688                 /* Set HP parameters (Cache Line Size, Latency Timer) */
2689                 rc = pciehprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_NORMAL);
2690                 if (rc)
2691                         return rc;
2692
2693                 pciehprm_enable_card(ctrl, func, PCI_HEADER_TYPE_NORMAL);
2694
2695                 dbg("PCI function Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, func->device,
2696                         func->function);
2697         }  /* End of Not-A-Bridge else */
2698         else {
2699                 /* It's some strange type of PCI adapter (Cardbus?) */
2700                 return DEVICE_TYPE_NOT_SUPPORTED;
2701         }
2702
2703         func->configured = 1;
2704
2705         return 0;
2706 }