drivers/pci/hotplug/cpqphp_ctrl.c

   1 /*
   2  * Compaq 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  *
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or (at
  13  * your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18  * NON INFRINGEMENT.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Send feedback to <greg@kroah.com>
  26  *
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/types.h>
  32 #include <linux/slab.h>
  33 #include <linux/workqueue.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/delay.h>
  36 #include <linux/wait.h>
  37 #include <linux/smp_lock.h>
  38 #include <linux/pci.h>
  39 #include <linux/pci_hotplug.h>
  40 #include <linux/kthread.h>
  41 #include "cpqphp.h"
  42
  43 static u32 configure_new_device(struct controller* ctrl, struct pci_func *func,
  44                         u8 behind_bridge, struct resource_lists *resources);
  45 static int configure_new_function(struct controller* ctrl, struct pci_func *func,
  46                         u8 behind_bridge, struct resource_lists *resources);
  47 static void interrupt_event_handler(struct controller *ctrl);
  48
  49
  50 static struct task_struct *cpqhp_event_thread;
  51 static unsigned long pushbutton_pending;        /* = 0 */
  52
  53 /* delay is in jiffies to wait for */
  54 static void long_delay(int delay)
  55 {
  56         /*
  57          * XXX(hch): if someone is bored please convert all callers
  58          * to call msleep_interruptible directly.  They really want
  59          * to specify timeouts in natural units and spend a lot of
  60          * effort converting them to jiffies..
  61          */
  62         msleep_interruptible(jiffies_to_msecs(delay));
  63 }
  64
  65
  66 /* FIXME: The following line needs to be somewhere else... */
  67 #define WRONG_BUS_FREQUENCY 0x07
  68 static u8 handle_switch_change(u8 change, struct controller * ctrl)
  69 {
  70         int hp_slot;
  71         u8 rc = 0;
  72         u16 temp_word;
  73         struct pci_func *func;
  74         struct event_info *taskInfo;
  75
  76         if (!change)
  77                 return 0;
  78
  79         /* Switch Change */
  80         dbg("cpqsbd:  Switch interrupt received.\n");
  81
  82         for (hp_slot = 0; hp_slot < 6; hp_slot++) {
  83                 if (change & (0x1L << hp_slot)) {
  84                         /**********************************
  85                          * this one changed.
  86                          **********************************/
  87                         func = cpqhp_slot_find(ctrl->bus,
  88                                 (hp_slot + ctrl->slot_device_offset), 0);
  89
  90                         /* this is the structure that tells the worker thread
  91                          *what to do */
  92                         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
  93                         ctrl->next_event = (ctrl->next_event + 1) % 10;
  94                         taskInfo->hp_slot = hp_slot;
  95
  96                         rc++;
  97
  98                         temp_word = ctrl->ctrl_int_comp >> 16;
  99                         func->presence_save = (temp_word >> hp_slot) & 0x01;
 100                         func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
 101
 102                         if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
 103                                 /**********************************
 104                                  * Switch opened
 105                                  **********************************/
 106
 107                                 func->switch_save = 0;
 108
 109                                 taskInfo->event_type = INT_SWITCH_OPEN;
 110                         } else {
 111                                 /**********************************
 112                                  * Switch closed
 113                                  **********************************/
 114
 115                                 func->switch_save = 0x10;
 116
 117                                 taskInfo->event_type = INT_SWITCH_CLOSE;
 118                         }
 119                 }
 120         }
 121
 122         return rc;
 123 }
 124
 125 /**
 126  * cpqhp_find_slot: find the struct slot of given device
 127  * @ctrl: scan lots of this controller
 128  * @device: the device id to find
 129  */
 130 static struct slot *cpqhp_find_slot(struct controller *ctrl, u8 device)
 131 {
 132         struct slot *slot = ctrl->slot;
 133
 134         while (slot && (slot->device != device)) {
 135                 slot = slot->next;
 136         }
 137
 138         return slot;
 139 }
 140
 141
 142 static u8 handle_presence_change(u16 change, struct controller * ctrl)
 143 {
 144         int hp_slot;
 145         u8 rc = 0;
 146         u8 temp_byte;
 147         u16 temp_word;
 148         struct pci_func *func;
 149         struct event_info *taskInfo;
 150         struct slot *p_slot;
 151
 152         if (!change)
 153                 return 0;
 154
 155         /**********************************
 156          * Presence Change
 157          **********************************/
 158         dbg("cpqsbd:  Presence/Notify input change.\n");
 159         dbg("         Changed bits are 0x%4.4x\n", change );
 160
 161         for (hp_slot = 0; hp_slot < 6; hp_slot++) {
 162                 if (change & (0x0101 << hp_slot)) {
 163                         /**********************************
 164                          * this one changed.
 165                          **********************************/
 166                         func = cpqhp_slot_find(ctrl->bus,
 167                                 (hp_slot + ctrl->slot_device_offset), 0);
 168
 169                         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 170                         ctrl->next_event = (ctrl->next_event + 1) % 10;
 171                         taskInfo->hp_slot = hp_slot;
 172
 173                         rc++;
 174
 175                         p_slot = cpqhp_find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4));
 176                         if (!p_slot)
 177                                 return 0;
 178
 179                         /* If the switch closed, must be a button
 180                          * If not in button mode, nevermind */
 181                         if (func->switch_save && (ctrl->push_button == 1)) {
 182                                 temp_word = ctrl->ctrl_int_comp >> 16;
 183                                 temp_byte = (temp_word >> hp_slot) & 0x01;
 184                                 temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02;
 185
 186                                 if (temp_byte != func->presence_save) {
 187                                         /**************************************
 188                                          * button Pressed (doesn't do anything)
 189                                          **************************************/
 190                                         dbg("hp_slot %d button pressed\n", hp_slot);
 191                                         taskInfo->event_type = INT_BUTTON_PRESS;
 192                                 } else {
 193                                         /**********************************
 194                                          * button Released - TAKE ACTION!!!!
 195                                          **********************************/
 196                                         dbg("hp_slot %d button released\n", hp_slot);
 197                                         taskInfo->event_type = INT_BUTTON_RELEASE;
 198
 199                                         /* Cancel if we are still blinking */
 200                                         if ((p_slot->state == BLINKINGON_STATE)
 201                                             || (p_slot->state == BLINKINGOFF_STATE)) {
 202                                                 taskInfo->event_type = INT_BUTTON_CANCEL;
 203                                                 dbg("hp_slot %d button cancel\n", hp_slot);
 204                                         } else if ((p_slot->state == POWERON_STATE)
 205                                                    || (p_slot->state == POWEROFF_STATE)) {
 206                                                 /* info(msg_button_ignore, p_slot->number); */
 207                                                 taskInfo->event_type = INT_BUTTON_IGNORE;
 208                                                 dbg("hp_slot %d button ignore\n", hp_slot);
 209                                         }
 210                                 }
 211                         } else {
 212                                 /* Switch is open, assume a presence change
 213                                  * Save the presence state */
 214                                 temp_word = ctrl->ctrl_int_comp >> 16;
 215                                 func->presence_save = (temp_word >> hp_slot) & 0x01;
 216                                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
 217
 218                                 if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) ||
 219                                     (!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) {
 220                                         /* Present */
 221                                         taskInfo->event_type = INT_PRESENCE_ON;
 222                                 } else {
 223                                         /* Not Present */
 224                                         taskInfo->event_type = INT_PRESENCE_OFF;
 225                                 }
 226                         }
 227                 }
 228         }
 229
 230         return rc;
 231 }
 232
 233
 234 static u8 handle_power_fault(u8 change, struct controller * ctrl)
 235 {
 236         int hp_slot;
 237         u8 rc = 0;
 238         struct pci_func *func;
 239         struct event_info *taskInfo;
 240
 241         if (!change)
 242                 return 0;
 243
 244         /**********************************
 245          * power fault
 246          **********************************/
 247
 248         info("power fault interrupt\n");
 249
 250         for (hp_slot = 0; hp_slot < 6; hp_slot++) {
 251                 if (change & (0x01 << hp_slot)) {
 252                         /**********************************
 253                          * this one changed.
 254                          **********************************/
 255                         func = cpqhp_slot_find(ctrl->bus,
 256                                 (hp_slot + ctrl->slot_device_offset), 0);
 257
 258                         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 259                         ctrl->next_event = (ctrl->next_event + 1) % 10;
 260                         taskInfo->hp_slot = hp_slot;
 261
 262                         rc++;
 263
 264                         if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) {
 265                                 /**********************************
 266                                  * power fault Cleared
 267                                  **********************************/
 268                                 func->status = 0x00;
 269
 270                                 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
 271                         } else {
 272                                 /**********************************
 273                                  * power fault
 274                                  **********************************/
 275                                 taskInfo->event_type = INT_POWER_FAULT;
 276
 277                                 if (ctrl->rev < 4) {
 278                                         amber_LED_on (ctrl, hp_slot);
 279                                         green_LED_off (ctrl, hp_slot);
 280                                         set_SOGO (ctrl);
 281
 282                                         /* this is a fatal condition, we want
 283                                          * to crash the machine to protect from
 284                                          * data corruption. simulated_NMI
 285                                          * shouldn't ever return */
 286                                         /* FIXME
 287                                         simulated_NMI(hp_slot, ctrl); */
 288
 289                                         /* The following code causes a software
 290                                          * crash just in case simulated_NMI did
 291                                          * return */
 292                                         /*FIXME
 293                                         panic(msg_power_fault); */
 294                                 } else {
 295                                         /* set power fault status for this board */
 296                                         func->status = 0xFF;
 297                                         info("power fault bit %x set\n", hp_slot);
 298                                 }
 299                         }
 300                 }
 301         }
 302
 303         return rc;
 304 }
 305
 306
 307 /**
 308  * sort_by_size: sort nodes on the list by their length, smallest first.
 309  * @head: list to sort
 310  *
 311  */
 312 static int sort_by_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  * sort_by_max_size: sort nodes on the list by their length, largest first.
 358  * @head: list to sort
 359  *
 360  */
 361 static int sort_by_max_size(struct pci_resource **head)
 362 {
 363         struct pci_resource *current_res;
 364         struct pci_resource *next_res;
 365         int out_of_order = 1;
 366
 367         if (!(*head))
 368                 return 1;
 369
 370         if (!((*head)->next))
 371                 return 0;
 372
 373         while (out_of_order) {
 374                 out_of_order = 0;
 375
 376                 /* Special case for swapping list head */
 377                 if (((*head)->next) &&
 378                     ((*head)->length < (*head)->next->length)) {
 379                         out_of_order++;
 380                         current_res = *head;
 381                         *head = (*head)->next;
 382                         current_res->next = (*head)->next;
 383                         (*head)->next = current_res;
 384                 }
 385
 386                 current_res = *head;
 387
 388                 while (current_res->next && current_res->next->next) {
 389                         if (current_res->next->length < current_res->next->next->length) {
 390                                 out_of_order++;
 391                                 next_res = current_res->next;
 392                                 current_res->next = current_res->next->next;
 393                                 current_res = current_res->next;
 394                                 next_res->next = current_res->next;
 395                                 current_res->next = next_res;
 396                         } else
 397                                 current_res = current_res->next;
 398                 }
 399         }  /* End of out_of_order loop */
 400
 401         return 0;
 402 }
 403
 404
 405 /**
 406  * do_pre_bridge_resource_split: find node of resources that are unused
 407  *
 408  */
 409 static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head,
 410                                 struct pci_resource **orig_head, u32 alignment)
 411 {
 412         struct pci_resource *prevnode = NULL;
 413         struct pci_resource *node;
 414         struct pci_resource *split_node;
 415         u32 rc;
 416         u32 temp_dword;
 417         dbg("do_pre_bridge_resource_split\n");
 418
 419         if (!(*head) || !(*orig_head))
 420                 return NULL;
 421
 422         rc = cpqhp_resource_sort_and_combine(head);
 423
 424         if (rc)
 425                 return NULL;
 426
 427         if ((*head)->base != (*orig_head)->base)
 428                 return NULL;
 429
 430         if ((*head)->length == (*orig_head)->length)
 431                 return NULL;
 432
 433
 434         /* If we got here, there the bridge requires some of the resource, but
 435          * we may be able to split some off of the front */
 436
 437         node = *head;
 438
 439         if (node->length & (alignment -1)) {
 440                 /* this one isn't an aligned length, so we'll make a new entry
 441                  * and split it up. */
 442                 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 443
 444                 if (!split_node)
 445                         return NULL;
 446
 447                 temp_dword = (node->length | (alignment-1)) + 1 - alignment;
 448
 449                 split_node->base = node->base;
 450                 split_node->length = temp_dword;
 451
 452                 node->length -= temp_dword;
 453                 node->base += split_node->length;
 454
 455                 /* Put it in the list */
 456                 *head = split_node;
 457                 split_node->next = node;
 458         }
 459
 460         if (node->length < alignment)
 461                 return NULL;
 462
 463         /* Now unlink it */
 464         if (*head == node) {
 465                 *head = node->next;
 466         } else {
 467                 prevnode = *head;
 468                 while (prevnode->next != node)
 469                         prevnode = prevnode->next;
 470
 471                 prevnode->next = node->next;
 472         }
 473         node->next = NULL;
 474
 475         return node;
 476 }
 477
 478
 479 /**
 480  * do_bridge_resource_split: find one node of resources that aren't in use
 481  *
 482  */
 483 static struct pci_resource *do_bridge_resource_split(struct pci_resource **head, u32 alignment)
 484 {
 485         struct pci_resource *prevnode = NULL;
 486         struct pci_resource *node;
 487         u32 rc;
 488         u32 temp_dword;
 489
 490         rc = cpqhp_resource_sort_and_combine(head);
 491
 492         if (rc)
 493                 return NULL;
 494
 495         node = *head;
 496
 497         while (node->next) {
 498                 prevnode = node;
 499                 node = node->next;
 500                 kfree(prevnode);
 501         }
 502
 503         if (node->length < alignment)
 504                 goto error;
 505
 506         if (node->base & (alignment - 1)) {
 507                 /* Short circuit if adjusted size is too small */
 508                 temp_dword = (node->base | (alignment-1)) + 1;
 509                 if ((node->length - (temp_dword - node->base)) < alignment)
 510                         goto error;
 511
 512                 node->length -= (temp_dword - node->base);
 513                 node->base = temp_dword;
 514         }
 515
 516         if (node->length & (alignment - 1))
 517                 /* There's stuff in use after this node */
 518                 goto error;
 519
 520         return node;
 521 error:
 522         kfree(node);
 523         return NULL;
 524 }
 525
 526
 527 /**
 528  * get_io_resource: find first node of given size not in ISA aliasing window.
 529  * @head: list to search
 530  * @size: size of node to find, must be a power of two.
 531  *
 532  * Description: this function sorts the resource list by size and then returns
 533  * returns the first node of "size" length that is not in the ISA aliasing
 534  * window.  If it finds a node larger than "size" it will split it up.
 535  *
 536  */
 537 static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size)
 538 {
 539         struct pci_resource *prevnode;
 540         struct pci_resource *node;
 541         struct pci_resource *split_node;
 542         u32 temp_dword;
 543
 544         if (!(*head))
 545                 return NULL;
 546
 547         if ( cpqhp_resource_sort_and_combine(head) )
 548                 return NULL;
 549
 550         if ( sort_by_size(head) )
 551                 return NULL;
 552
 553         for (node = *head; node; node = node->next) {
 554                 if (node->length < size)
 555                         continue;
 556
 557                 if (node->base & (size - 1)) {
 558                         /* this one isn't base aligned properly
 559                          * so we'll make a new entry and split it up */
 560                         temp_dword = (node->base | (size-1)) + 1;
 561
 562                         /* Short circuit if adjusted size is too small */
 563                         if ((node->length - (temp_dword - node->base)) < size)
 564                                 continue;
 565
 566                         split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 567
 568                         if (!split_node)
 569                                 return NULL;
 570
 571                         split_node->base = node->base;
 572                         split_node->length = temp_dword - node->base;
 573                         node->base = temp_dword;
 574                         node->length -= split_node->length;
 575
 576                         /* Put it in the list */
 577                         split_node->next = node->next;
 578                         node->next = split_node;
 579                 } /* End of non-aligned base */
 580
 581                 /* Don't need to check if too small since we already did */
 582                 if (node->length > size) {
 583                         /* this one is longer than we need
 584                          * so we'll make a new entry and split it up */
 585                         split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 586
 587                         if (!split_node)
 588                                 return NULL;
 589
 590                         split_node->base = node->base + size;
 591                         split_node->length = node->length - size;
 592                         node->length = size;
 593
 594                         /* Put it in the list */
 595                         split_node->next = node->next;
 596                         node->next = split_node;
 597                 }  /* End of too big on top end */
 598
 599                 /* For IO make sure it's not in the ISA aliasing space */
 600                 if (node->base & 0x300L)
 601                         continue;
 602
 603                 /* If we got here, then it is the right size
 604                  * Now take it out of the list and break */
 605                 if (*head == node) {
 606                         *head = node->next;
 607                 } else {
 608                         prevnode = *head;
 609                         while (prevnode->next != node)
 610                                 prevnode = prevnode->next;
 611
 612                         prevnode->next = node->next;
 613                 }
 614                 node->next = NULL;
 615                 break;
 616         }
 617
 618         return node;
 619 }
 620
 621
 622 /**
 623  * get_max_resource: get largest node which has at least the given size.
 624  * @head: the list to search the node in
 625  * @size: the minimum size of the node to find
 626  *
 627  * Description: Gets the largest node that is at least "size" big from the
 628  * list pointed to by head.  It aligns the node on top and bottom
 629  * to "size" alignment before returning it.
 630  */
 631 static struct pci_resource *get_max_resource(struct pci_resource **head, u32 size)
 632 {
 633         struct pci_resource *max;
 634         struct pci_resource *temp;
 635         struct pci_resource *split_node;
 636         u32 temp_dword;
 637
 638         if (cpqhp_resource_sort_and_combine(head))
 639                 return NULL;
 640
 641         if (sort_by_max_size(head))
 642                 return NULL;
 643
 644         for (max = *head; max; max = max->next) {
 645                 /* If not big enough we could probably just bail,
 646                  * instead we'll continue to the next. */
 647                 if (max->length < size)
 648                         continue;
 649
 650                 if (max->base & (size - 1)) {
 651                         /* this one isn't base aligned properly
 652                          * so we'll make a new entry and split it up */
 653                         temp_dword = (max->base | (size-1)) + 1;
 654
 655                         /* Short circuit if adjusted size is too small */
 656                         if ((max->length - (temp_dword - max->base)) < size)
 657                                 continue;
 658
 659                         split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 660
 661                         if (!split_node)
 662                                 return NULL;
 663
 664                         split_node->base = max->base;
 665                         split_node->length = temp_dword - max->base;
 666                         max->base = temp_dword;
 667                         max->length -= split_node->length;
 668
 669                         split_node->next = max->next;
 670                         max->next = split_node;
 671                 }
 672
 673                 if ((max->base + max->length) & (size - 1)) {
 674                         /* this one isn't end aligned properly at the top
 675                          * so we'll make a new entry and split it up */
 676                         split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 677
 678                         if (!split_node)
 679                                 return NULL;
 680                         temp_dword = ((max->base + max->length) & ~(size - 1));
 681                         split_node->base = temp_dword;
 682                         split_node->length = max->length + max->base
 683                                              - split_node->base;
 684                         max->length -= split_node->length;
 685
 686                         split_node->next = max->next;
 687                         max->next = split_node;
 688                 }
 689
 690                 /* Make sure it didn't shrink too much when we aligned it */
 691                 if (max->length < size)
 692                         continue;
 693
 694                 /* Now take it out of the list */
 695                 temp = *head;
 696                 if (temp == max) {
 697                         *head = max->next;
 698                 } else {
 699                         while (temp && temp->next != max) {
 700                                 temp = temp->next;
 701                         }
 702
 703                         temp->next = max->next;
 704                 }
 705
 706                 max->next = NULL;
 707                 break;
 708         }
 709
 710         return max;
 711 }
 712
 713
 714 /**
 715  * get_resource: find resource of given size and split up larger ones.
 716  * @head: the list to search for resources
 717  * @size: the size limit to use
 718  *
 719  * Description: This function sorts the resource list by size and then
 720  * returns the first node of "size" length.  If it finds a node
 721  * larger than "size" it will split it up.
 722  *
 723  * size must be a power of two.
 724  */
 725 static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
 726 {
 727         struct pci_resource *prevnode;
 728         struct pci_resource *node;
 729         struct pci_resource *split_node;
 730         u32 temp_dword;
 731
 732         if (cpqhp_resource_sort_and_combine(head))
 733                 return NULL;
 734
 735         if (sort_by_size(head))
 736                 return NULL;
 737
 738         for (node = *head; node; node = node->next) {
 739                 dbg("%s: req_size =%x node=%p, base=%x, length=%x\n",
 740                     __FUNCTION__, size, node, node->base, node->length);
 741                 if (node->length < size)
 742                         continue;
 743
 744                 if (node->base & (size - 1)) {
 745                         dbg("%s: not aligned\n", __FUNCTION__);
 746                         /* this one isn't base aligned properly
 747                          * so we'll make a new entry and split it up */
 748                         temp_dword = (node->base | (size-1)) + 1;
 749
 750                         /* Short circuit if adjusted size is too small */
 751                         if ((node->length - (temp_dword - node->base)) < size)
 752                                 continue;
 753
 754                         split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 755
 756                         if (!split_node)
 757                                 return NULL;
 758
 759                         split_node->base = node->base;
 760                         split_node->length = temp_dword - node->base;
 761                         node->base = temp_dword;
 762                         node->length -= split_node->length;
 763
 764                         split_node->next = node->next;
 765                         node->next = split_node;
 766                 } /* End of non-aligned base */
 767
 768                 /* Don't need to check if too small since we already did */
 769                 if (node->length > size) {
 770                         dbg("%s: too big\n", __FUNCTION__);
 771                         /* this one is longer than we need
 772                          * so we'll make a new entry and split it up */
 773                         split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
 774
 775                         if (!split_node)
 776                                 return NULL;
 777
 778                         split_node->base = node->base + size;
 779                         split_node->length = node->length - size;
 780                         node->length = size;
 781
 782                         /* Put it in the list */
 783                         split_node->next = node->next;
 784                         node->next = split_node;
 785                 }  /* End of too big on top end */
 786
 787                 dbg("%s: got one!!!\n", __FUNCTION__);
 788                 /* If we got here, then it is the right size
 789                  * Now take it out of the list */
 790                 if (*head == node) {
 791                         *head = node->next;
 792                 } else {
 793                         prevnode = *head;
 794                         while (prevnode->next != node)
 795                                 prevnode = prevnode->next;
 796
 797                         prevnode->next = node->next;
 798                 }
 799                 node->next = NULL;
 800                 break;
 801         }
 802         return node;
 803 }
 804
 805
 806 /**
 807  * cpqhp_resource_sort_and_combine: sort nodes by base addresses and clean up.
 808  * @head: the list to sort and clean up
 809  *
 810  * Description: Sorts all of the nodes in the list in ascending order by
 811  * their base addresses.  Also does garbage collection by
 812  * combining adjacent nodes.
 813  *
 814  * returns 0 if success
 815  */
 816 int cpqhp_resource_sort_and_combine(struct pci_resource **head)
 817 {
 818         struct pci_resource *node1;
 819         struct pci_resource *node2;
 820         int out_of_order = 1;
 821
 822         dbg("%s: head = %p, *head = %p\n", __FUNCTION__, head, *head);
 823
 824         if (!(*head))
 825                 return 1;
 826
 827         dbg("*head->next = %p\n",(*head)->next);
 828
 829         if (!(*head)->next)
 830                 return 0;       /* only one item on the list, already sorted! */
 831
 832         dbg("*head->base = 0x%x\n",(*head)->base);
 833         dbg("*head->next->base = 0x%x\n",(*head)->next->base);
 834         while (out_of_order) {
 835                 out_of_order = 0;
 836
 837                 /* Special case for swapping list head */
 838                 if (((*head)->next) &&
 839                     ((*head)->base > (*head)->next->base)) {
 840                         node1 = *head;
 841                         (*head) = (*head)->next;
 842                         node1->next = (*head)->next;
 843                         (*head)->next = node1;
 844                         out_of_order++;
 845                 }
 846
 847                 node1 = (*head);
 848
 849                 while (node1->next && node1->next->next) {
 850                         if (node1->next->base > node1->next->next->base) {
 851                                 out_of_order++;
 852                                 node2 = node1->next;
 853                                 node1->next = node1->next->next;
 854                                 node1 = node1->next;
 855                                 node2->next = node1->next;
 856                                 node1->next = node2;
 857                         } else
 858                                 node1 = node1->next;
 859                 }
 860         }  /* End of out_of_order loop */
 861
 862         node1 = *head;
 863
 864         while (node1 && node1->next) {
 865                 if ((node1->base + node1->length) == node1->next->base) {
 866                         /* Combine */
 867                         dbg("8..\n");
 868                         node1->length += node1->next->length;
 869                         node2 = node1->next;
 870                         node1->next = node1->next->next;
 871                         kfree(node2);
 872                 } else
 873                         node1 = node1->next;
 874         }
 875
 876         return 0;
 877 }
 878
 879
 880 irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data)
 881 {
 882         struct controller *ctrl = data;
 883         u8 schedule_flag = 0;
 884         u8 reset;
 885         u16 misc;
 886         u32 Diff;
 887         u32 temp_dword;
 888
 889
 890         misc = readw(ctrl->hpc_reg + MISC);
 891         /***************************************
 892          * Check to see if it was our interrupt
 893          ***************************************/
 894         if (!(misc & 0x000C)) {
 895                 return IRQ_NONE;
 896         }
 897
 898         if (misc & 0x0004) {
 899                 /**********************************
 900                  * Serial Output interrupt Pending
 901                  **********************************/
 902
 903                 /* Clear the interrupt */
 904                 misc |= 0x0004;
 905                 writew(misc, ctrl->hpc_reg + MISC);
 906
 907                 /* Read to clear posted writes */
 908                 misc = readw(ctrl->hpc_reg + MISC);
 909
 910                 dbg ("%s - waking up\n", __FUNCTION__);
 911                 wake_up_interruptible(&ctrl->queue);
 912         }
 913
 914         if (misc & 0x0008) {
 915                 /* General-interrupt-input interrupt Pending */
 916                 Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp;
 917
 918                 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 919
 920                 /* Clear the interrupt */
 921                 writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR);
 922
 923                 /* Read it back to clear any posted writes */
 924                 temp_dword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 925
 926                 if (!Diff)
 927                         /* Clear all interrupts */
 928                         writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR);
 929
 930                 schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl);
 931                 schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl);
 932                 schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl);
 933         }
 934
 935         reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
 936         if (reset & 0x40) {
 937                 /* Bus reset has completed */
 938                 reset &= 0xCF;
 939                 writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE);
 940                 reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
 941                 wake_up_interruptible(&ctrl->queue);
 942         }
 943
 944         if (schedule_flag) {
 945                 wake_up_process(cpqhp_event_thread);
 946                 dbg("Waking even thread");
 947         }
 948         return IRQ_HANDLED;
 949 }
 950
 951
 952 /**
 953  * cpqhp_slot_create - Creates a node and adds it to the proper bus.
 954  * @busnumber - bus where new node is to be located
 955  *
 956  * Returns pointer to the new node or NULL if unsuccessful
 957  */
 958 struct pci_func *cpqhp_slot_create(u8 busnumber)
 959 {
 960         struct pci_func *new_slot;
 961         struct pci_func *next;
 962
 963         new_slot = kzalloc(sizeof(*new_slot), GFP_KERNEL);
 964         if (new_slot == NULL) {
 965                 /* I'm not dead yet!
 966                  * You will be. */
 967                 return new_slot;
 968         }
 969
 970         new_slot->next = NULL;
 971         new_slot->configured = 1;
 972
 973         if (cpqhp_slot_list[busnumber] == NULL) {
 974                 cpqhp_slot_list[busnumber] = new_slot;
 975         } else {
 976                 next = cpqhp_slot_list[busnumber];
 977                 while (next->next != NULL)
 978                         next = next->next;
 979                 next->next = new_slot;
 980         }
 981         return new_slot;
 982 }
 983
 984
 985 /**
 986  * slot_remove - Removes a node from the linked list of slots.
 987  * @old_slot: slot to remove
 988  *
 989  * Returns 0 if successful, !0 otherwise.
 990  */
 991 static int slot_remove(struct pci_func * old_slot)
 992 {
 993         struct pci_func *next;
 994
 995         if (old_slot == NULL)
 996                 return 1;
 997
 998         next = cpqhp_slot_list[old_slot->bus];
 999
1000         if (next == NULL) {
1001                 return 1;
1002         }
1003
1004         if (next == old_slot) {
1005                 cpqhp_slot_list[old_slot->bus] = old_slot->next;
1006                 cpqhp_destroy_board_resources(old_slot);
1007                 kfree(old_slot);
1008                 return 0;
1009         }
1010
1011         while ((next->next != old_slot) && (next->next != NULL)) {
1012                 next = next->next;
1013         }
1014
1015         if (next->next == old_slot) {
1016                 next->next = old_slot->next;
1017                 cpqhp_destroy_board_resources(old_slot);
1018                 kfree(old_slot);
1019                 return 0;
1020         } else
1021                 return 2;
1022 }
1023
1024
1025 /**
1026  * bridge_slot_remove - Removes a node from the linked list of slots.
1027  * @bridge: bridge to remove
1028  *
1029  * Returns 0 if successful, !0 otherwise.
1030  */
1031 static int bridge_slot_remove(struct pci_func *bridge)
1032 {
1033         u8 subordinateBus, secondaryBus;
1034         u8 tempBus;
1035         struct pci_func *next;
1036
1037         secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
1038         subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
1039
1040         for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
1041                 next = cpqhp_slot_list[tempBus];
1042
1043                 while (!slot_remove(next)) {
1044                         next = cpqhp_slot_list[tempBus];
1045                 }
1046         }
1047
1048         next = cpqhp_slot_list[bridge->bus];
1049
1050         if (next == NULL)
1051                 return 1;
1052
1053         if (next == bridge) {
1054                 cpqhp_slot_list[bridge->bus] = bridge->next;
1055                 goto out;
1056         }
1057
1058         while ((next->next != bridge) && (next->next != NULL))
1059                 next = next->next;
1060
1061         if (next->next != bridge)
1062                 return 2;
1063         next->next = bridge->next;
1064 out:
1065         kfree(bridge);
1066         return 0;
1067 }
1068
1069
1070 /**
1071  * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed
1072  * @bus: bus to find
1073  * @device: device to find
1074  * @index: is 0 for first function found, 1 for the second...
1075  *
1076  * Returns pointer to the node if successful, %NULL otherwise.
1077  */
1078 struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index)
1079 {
1080         int found = -1;
1081         struct pci_func *func;
1082
1083         func = cpqhp_slot_list[bus];
1084
1085         if ((func == NULL) || ((func->device == device) && (index == 0)))
1086                 return func;
1087
1088         if (func->device == device)
1089                 found++;
1090
1091         while (func->next != NULL) {
1092                 func = func->next;
1093
1094                 if (func->device == device)
1095                         found++;
1096
1097                 if (found == index)
1098                         return func;
1099         }
1100
1101         return NULL;
1102 }
1103
1104
1105 /* DJZ: I don't think is_bridge will work as is.
1106  * FIXME */
1107 static int is_bridge(struct pci_func * func)
1108 {
1109         /* Check the header type */
1110         if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
1111                 return 1;
1112         else
1113                 return 0;
1114 }
1115
1116
1117 /**
1118  * set_controller_speed - set the frequency and/or mode of a specific
1119  * controller segment.
1120  *
1121  * @ctrl: controller to change frequency/mode for.
1122  * @adapter_speed: the speed of the adapter we want to match.
1123  * @hp_slot: the slot number where the adapter is installed.
1124  *
1125  * Returns 0 if we successfully change frequency and/or mode to match the
1126  * adapter speed.
1127  *
1128  */
1129 static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot)
1130 {
1131         struct slot *slot;
1132         u8 reg;
1133         u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
1134         u16 reg16;
1135         u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
1136
1137         if (ctrl->speed == adapter_speed)
1138                 return 0;
1139
1140         /* We don't allow freq/mode changes if we find another adapter running
1141          * in another slot on this controller */
1142         for(slot = ctrl->slot; slot; slot = slot->next) {
1143                 if (slot->device == (hp_slot + ctrl->slot_device_offset))
1144                         continue;
1145                 if (!slot->hotplug_slot && !slot->hotplug_slot->info)
1146                         continue;
1147                 if (slot->hotplug_slot->info->adapter_status == 0)
1148                         continue;
1149                 /* If another adapter is running on the same segment but at a
1150                  * lower speed/mode, we allow the new adapter to function at
1151                  * this rate if supported */
1152                 if (ctrl->speed < adapter_speed)
1153                         return 0;
1154
1155                 return 1;
1156         }
1157
1158         /* If the controller doesn't support freq/mode changes and the
1159          * controller is running at a higher mode, we bail */
1160         if ((ctrl->speed > adapter_speed) && (!ctrl->pcix_speed_capability))
1161                 return 1;
1162
1163         /* But we allow the adapter to run at a lower rate if possible */
1164         if ((ctrl->speed < adapter_speed) && (!ctrl->pcix_speed_capability))
1165                 return 0;
1166
1167         /* We try to set the max speed supported by both the adapter and
1168          * controller */
1169         if (ctrl->speed_capability < adapter_speed) {
1170                 if (ctrl->speed == ctrl->speed_capability)
1171                         return 0;
1172                 adapter_speed = ctrl->speed_capability;
1173         }
1174
1175         writel(0x0L, ctrl->hpc_reg + LED_CONTROL);
1176         writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE);
1177
1178         set_SOGO(ctrl);
1179         wait_for_ctrl_irq(ctrl);
1180
1181         if (adapter_speed != PCI_SPEED_133MHz_PCIX)
1182                 reg = 0xF5;
1183         else
1184                 reg = 0xF4;
1185         pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1186
1187         reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ);
1188         reg16 &= ~0x000F;
1189         switch(adapter_speed) {
1190                 case(PCI_SPEED_133MHz_PCIX):
1191                         reg = 0x75;
1192                         reg16 |= 0xB;
1193                         break;
1194                 case(PCI_SPEED_100MHz_PCIX):
1195                         reg = 0x74;
1196                         reg16 |= 0xA;
1197                         break;
1198                 case(PCI_SPEED_66MHz_PCIX):
1199                         reg = 0x73;
1200                         reg16 |= 0x9;
1201                         break;
1202                 case(PCI_SPEED_66MHz):
1203                         reg = 0x73;
1204                         reg16 |= 0x1;
1205                         break;
1206                 default: /* 33MHz PCI 2.2 */
1207                         reg = 0x71;
1208                         break;
1209
1210         }
1211         reg16 |= 0xB << 12;
1212         writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ);
1213
1214         mdelay(5);
1215
1216         /* Reenable interrupts */
1217         writel(0, ctrl->hpc_reg + INT_MASK);
1218
1219         pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1220
1221         /* Restart state machine */
1222         reg = ~0xF;
1223         pci_read_config_byte(ctrl->pci_dev, 0x43, &reg);
1224         pci_write_config_byte(ctrl->pci_dev, 0x43, reg);
1225
1226         /* Only if mode change...*/
1227         if (((ctrl->speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) ||
1228                 ((ctrl->speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz)))
1229                         set_SOGO(ctrl);
1230
1231         wait_for_ctrl_irq(ctrl);
1232         mdelay(1100);
1233
1234         /* Restore LED/Slot state */
1235         writel(leds, ctrl->hpc_reg + LED_CONTROL);
1236         writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE);
1237
1238         set_SOGO(ctrl);
1239         wait_for_ctrl_irq(ctrl);
1240
1241         ctrl->speed = adapter_speed;
1242         slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1243
1244         info("Successfully changed frequency/mode for adapter in slot %d\n",
1245                         slot->number);
1246         return 0;
1247 }
1248
1249 /* the following routines constitute the bulk of the
1250    hotplug controller logic
1251  */
1252
1253
1254 /**
1255  * board_replaced - Called after a board has been replaced in the system.
1256  *
1257  * This is only used if we don't have resources for hot add
1258  * Turns power on for the board
1259  * Checks to see if board is the same
1260  * If board is same, reconfigures it
1261  * If board isn't same, turns it back off.
1262  *
1263  */
1264 static u32 board_replaced(struct pci_func *func, struct controller *ctrl)
1265 {
1266         u8 hp_slot;
1267         u8 temp_byte;
1268         u8 adapter_speed;
1269         u32 rc = 0;
1270
1271         hp_slot = func->device - ctrl->slot_device_offset;
1272
1273         if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot)) {
1274                 /**********************************
1275                  * The switch is open.
1276                  **********************************/
1277                 rc = INTERLOCK_OPEN;
1278         } else if (is_slot_enabled (ctrl, hp_slot)) {
1279                 /**********************************
1280                  * The board is already on
1281                  **********************************/
1282                 rc = CARD_FUNCTIONING;
1283         } else {
1284                 mutex_lock(&ctrl->crit_sect);
1285
1286                 /* turn on board without attaching to the bus */
1287                 enable_slot_power (ctrl, hp_slot);
1288
1289                 set_SOGO(ctrl);
1290
1291                 /* Wait for SOBS to be unset */
1292                 wait_for_ctrl_irq (ctrl);
1293
1294                 /* Change bits in slot power register to force another shift out
1295                  * NOTE: this is to work around the timer bug */
1296                 temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1297                 writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1298                 writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1299
1300                 set_SOGO(ctrl);
1301
1302                 /* Wait for SOBS to be unset */
1303                 wait_for_ctrl_irq (ctrl);
1304
1305                 adapter_speed = get_adapter_speed(ctrl, hp_slot);
1306                 if (ctrl->speed != adapter_speed)
1307                         if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1308                                 rc = WRONG_BUS_FREQUENCY;
1309
1310                 /* turn off board without attaching to the bus */
1311                 disable_slot_power (ctrl, hp_slot);
1312
1313                 set_SOGO(ctrl);
1314
1315                 /* Wait for SOBS to be unset */
1316                 wait_for_ctrl_irq (ctrl);
1317
1318                 mutex_unlock(&ctrl->crit_sect);
1319
1320                 if (rc)
1321                         return rc;
1322
1323                 mutex_lock(&ctrl->crit_sect);
1324
1325                 slot_enable (ctrl, hp_slot);
1326                 green_LED_blink (ctrl, hp_slot);
1327
1328                 amber_LED_off (ctrl, hp_slot);
1329
1330                 set_SOGO(ctrl);
1331
1332                 /* Wait for SOBS to be unset */
1333                 wait_for_ctrl_irq (ctrl);
1334
1335                 mutex_unlock(&ctrl->crit_sect);
1336
1337                 /* Wait for ~1 second because of hot plug spec */
1338                 long_delay(1*HZ);
1339
1340                 /* Check for a power fault */
1341                 if (func->status == 0xFF) {
1342                         /* power fault occurred, but it was benign */
1343                         rc = POWER_FAILURE;
1344                         func->status = 0;
1345                 } else
1346                         rc = cpqhp_valid_replace(ctrl, func);
1347
1348                 if (!rc) {
1349                         /* It must be the same board */
1350
1351                         rc = cpqhp_configure_board(ctrl, func);
1352
1353                         /* If configuration fails, turn it off
1354                          * Get slot won't work for devices behind
1355                          * bridges, but in this case it will always be
1356                          * called for the "base" bus/dev/func of an
1357                          * adapter. */
1358
1359                         mutex_lock(&ctrl->crit_sect);
1360
1361                         amber_LED_on (ctrl, hp_slot);
1362                         green_LED_off (ctrl, hp_slot);
1363                         slot_disable (ctrl, hp_slot);
1364
1365                         set_SOGO(ctrl);
1366
1367                         /* Wait for SOBS to be unset */
1368                         wait_for_ctrl_irq (ctrl);
1369
1370                         mutex_unlock(&ctrl->crit_sect);
1371
1372                         if (rc)
1373                                 return rc;
1374                         else
1375                                 return 1;
1376
1377                 } else {
1378                         /* Something is wrong
1379
1380                          * Get slot won't work for devices behind bridges, but
1381                          * in this case it will always be called for the "base"
1382                          * bus/dev/func of an adapter. */
1383
1384                         mutex_lock(&ctrl->crit_sect);
1385
1386                         amber_LED_on (ctrl, hp_slot);
1387                         green_LED_off (ctrl, hp_slot);
1388                         slot_disable (ctrl, hp_slot);
1389
1390                         set_SOGO(ctrl);
1391
1392                         /* Wait for SOBS to be unset */
1393                         wait_for_ctrl_irq (ctrl);
1394
1395                         mutex_unlock(&ctrl->crit_sect);
1396                 }
1397
1398         }
1399         return rc;
1400
1401 }
1402
1403
1404 /**
1405  * board_added - Called after a board has been added to the system.
1406  *
1407  * Turns power on for the board
1408  * Configures board
1409  *
1410  */
1411 static u32 board_added(struct pci_func *func, struct controller *ctrl)
1412 {
1413         u8 hp_slot;
1414         u8 temp_byte;
1415         u8 adapter_speed;
1416         int index;
1417         u32 temp_register = 0xFFFFFFFF;
1418         u32 rc = 0;
1419         struct pci_func *new_slot = NULL;
1420         struct slot *p_slot;
1421         struct resource_lists res_lists;
1422
1423         hp_slot = func->device - ctrl->slot_device_offset;
1424         dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n",
1425             __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot);
1426
1427         mutex_lock(&ctrl->crit_sect);
1428
1429         /* turn on board without attaching to the bus */
1430         enable_slot_power(ctrl, hp_slot);
1431
1432         set_SOGO(ctrl);
1433
1434         /* Wait for SOBS to be unset */
1435         wait_for_ctrl_irq (ctrl);
1436
1437         /* Change bits in slot power register to force another shift out
1438          * NOTE: this is to work around the timer bug */
1439         temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1440         writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1441         writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1442
1443         set_SOGO(ctrl);
1444
1445         /* Wait for SOBS to be unset */
1446         wait_for_ctrl_irq (ctrl);
1447
1448         adapter_speed = get_adapter_speed(ctrl, hp_slot);
1449         if (ctrl->speed != adapter_speed)
1450                 if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1451                         rc = WRONG_BUS_FREQUENCY;
1452
1453         /* turn off board without attaching to the bus */
1454         disable_slot_power (ctrl, hp_slot);
1455
1456         set_SOGO(ctrl);
1457
1458         /* Wait for SOBS to be unset */
1459         wait_for_ctrl_irq(ctrl);
1460
1461         mutex_unlock(&ctrl->crit_sect);
1462
1463         if (rc)
1464                 return rc;
1465
1466         p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1467
1468         /* turn on board and blink green LED */
1469
1470         dbg("%s: before down\n", __FUNCTION__);
1471         mutex_lock(&ctrl->crit_sect);
1472         dbg("%s: after down\n", __FUNCTION__);
1473
1474         dbg("%s: before slot_enable\n", __FUNCTION__);
1475         slot_enable (ctrl, hp_slot);
1476
1477         dbg("%s: before green_LED_blink\n", __FUNCTION__);
1478         green_LED_blink (ctrl, hp_slot);
1479
1480         dbg("%s: before amber_LED_blink\n", __FUNCTION__);
1481         amber_LED_off (ctrl, hp_slot);
1482
1483         dbg("%s: before set_SOGO\n", __FUNCTION__);
1484         set_SOGO(ctrl);
1485
1486         /* Wait for SOBS to be unset */
1487         dbg("%s: before wait_for_ctrl_irq\n", __FUNCTION__);
1488         wait_for_ctrl_irq (ctrl);
1489         dbg("%s: after wait_for_ctrl_irq\n", __FUNCTION__);
1490
1491         dbg("%s: before up\n", __FUNCTION__);
1492         mutex_unlock(&ctrl->crit_sect);
1493         dbg("%s: after up\n", __FUNCTION__);
1494
1495         /* Wait for ~1 second because of hot plug spec */
1496         dbg("%s: before long_delay\n", __FUNCTION__);
1497         long_delay(1*HZ);
1498         dbg("%s: after long_delay\n", __FUNCTION__);
1499
1500         dbg("%s: func status = %x\n", __FUNCTION__, func->status);
1501         /* Check for a power fault */
1502         if (func->status == 0xFF) {
1503                 /* power fault occurred, but it was benign */
1504                 temp_register = 0xFFFFFFFF;
1505                 dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register);
1506                 rc = POWER_FAILURE;
1507                 func->status = 0;
1508         } else {
1509                 /* Get vendor/device ID u32 */
1510                 ctrl->pci_bus->number = func->bus;
1511                 rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
1512                 dbg("%s: pci_read_config_dword returns %d\n", __FUNCTION__, rc);
1513                 dbg("%s: temp_register is %x\n", __FUNCTION__, temp_register);
1514
1515                 if (rc != 0) {
1516                         /* Something's wrong here */
1517                         temp_register = 0xFFFFFFFF;
1518                         dbg("%s: temp register set to %x by error\n", __FUNCTION__, temp_register);
1519                 }
1520                 /* Preset return code.  It will be changed later if things go okay. */
1521                 rc = NO_ADAPTER_PRESENT;
1522         }
1523
1524         /* All F's is an empty slot or an invalid board */
1525         if (temp_register != 0xFFFFFFFF) {        /* Check for a board in the slot */
1526                 res_lists.io_head = ctrl->io_head;
1527                 res_lists.mem_head = ctrl->mem_head;
1528                 res_lists.p_mem_head = ctrl->p_mem_head;
1529                 res_lists.bus_head = ctrl->bus_head;
1530                 res_lists.irqs = NULL;
1531
1532                 rc = configure_new_device(ctrl, func, 0, &res_lists);
1533
1534                 dbg("%s: back from configure_new_device\n", __FUNCTION__);
1535                 ctrl->io_head = res_lists.io_head;
1536                 ctrl->mem_head = res_lists.mem_head;
1537                 ctrl->p_mem_head = res_lists.p_mem_head;
1538                 ctrl->bus_head = res_lists.bus_head;
1539
1540                 cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1541                 cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1542                 cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1543                 cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1544
1545                 if (rc) {
1546                         mutex_lock(&ctrl->crit_sect);
1547
1548                         amber_LED_on (ctrl, hp_slot);
1549                         green_LED_off (ctrl, hp_slot);
1550                         slot_disable (ctrl, hp_slot);
1551
1552                         set_SOGO(ctrl);
1553
1554                         /* Wait for SOBS to be unset */
1555                         wait_for_ctrl_irq (ctrl);
1556
1557                         mutex_unlock(&ctrl->crit_sect);
1558                         return rc;
1559                 } else {
1560                         cpqhp_save_slot_config(ctrl, func);
1561                 }
1562
1563
1564                 func->status = 0;
1565                 func->switch_save = 0x10;
1566                 func->is_a_board = 0x01;
1567
1568                 /* next, we will instantiate the linux pci_dev structures (with
1569                  * appropriate driver notification, if already present) */
1570                 dbg("%s: configure linux pci_dev structure\n", __FUNCTION__);
1571                 index = 0;
1572                 do {
1573                         new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++);
1574                         if (new_slot && !new_slot->pci_dev) {
1575                                 cpqhp_configure_device(ctrl, new_slot);
1576                         }
1577                 } while (new_slot);
1578
1579                 mutex_lock(&ctrl->crit_sect);
1580
1581                 green_LED_on (ctrl, hp_slot);
1582
1583                 set_SOGO(ctrl);
1584
1585                 /* Wait for SOBS to be unset */
1586                 wait_for_ctrl_irq (ctrl);
1587
1588                 mutex_unlock(&ctrl->crit_sect);
1589         } else {
1590                 mutex_lock(&ctrl->crit_sect);
1591
1592                 amber_LED_on (ctrl, hp_slot);
1593                 green_LED_off (ctrl, hp_slot);
1594                 slot_disable (ctrl, hp_slot);
1595
1596                 set_SOGO(ctrl);
1597
1598                 /* Wait for SOBS to be unset */
1599                 wait_for_ctrl_irq (ctrl);
1600
1601                 mutex_unlock(&ctrl->crit_sect);
1602
1603                 return rc;
1604         }
1605         return 0;
1606 }
1607
1608
1609 /**
1610  * remove_board - Turns off slot and LED's
1611  *
1612  */
1613 static u32 remove_board(struct pci_func * func, u32 replace_flag, struct controller * ctrl)
1614 {
1615         int index;
1616         u8 skip = 0;
1617         u8 device;
1618         u8 hp_slot;
1619         u8 temp_byte;
1620         u32 rc;
1621         struct resource_lists res_lists;
1622         struct pci_func *temp_func;
1623
1624         if (cpqhp_unconfigure_device(func))
1625                 return 1;
1626
1627         device = func->device;
1628
1629         hp_slot = func->device - ctrl->slot_device_offset;
1630         dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
1631
1632         /* When we get here, it is safe to change base address registers.
1633          * We will attempt to save the base address register lengths */
1634         if (replace_flag || !ctrl->add_support)
1635                 rc = cpqhp_save_base_addr_length(ctrl, func);
1636         else if (!func->bus_head && !func->mem_head &&
1637                  !func->p_mem_head && !func->io_head) {
1638                 /* Here we check to see if we've saved any of the board's
1639                  * resources already.  If so, we'll skip the attempt to
1640                  * determine what's being used. */
1641                 index = 0;
1642                 temp_func = cpqhp_slot_find(func->bus, func->device, index++);
1643                 while (temp_func) {
1644                         if (temp_func->bus_head || temp_func->mem_head
1645                             || temp_func->p_mem_head || temp_func->io_head) {
1646                                 skip = 1;
1647                                 break;
1648                         }
1649                         temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
1650                 }
1651
1652                 if (!skip)
1653                         rc = cpqhp_save_used_resources(ctrl, func);
1654         }
1655         /* Change status to shutdown */
1656         if (func->is_a_board)
1657                 func->status = 0x01;
1658         func->configured = 0;
1659
1660         mutex_lock(&ctrl->crit_sect);
1661
1662         green_LED_off (ctrl, hp_slot);
1663         slot_disable (ctrl, hp_slot);
1664
1665         set_SOGO(ctrl);
1666
1667         /* turn off SERR for slot */
1668         temp_byte = readb(ctrl->hpc_reg + SLOT_SERR);
1669         temp_byte &= ~(0x01 << hp_slot);
1670         writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR);
1671
1672         /* Wait for SOBS to be unset */
1673         wait_for_ctrl_irq (ctrl);
1674
1675         mutex_unlock(&ctrl->crit_sect);
1676
1677         if (!replace_flag && ctrl->add_support) {
1678                 while (func) {
1679                         res_lists.io_head = ctrl->io_head;
1680                         res_lists.mem_head = ctrl->mem_head;
1681                         res_lists.p_mem_head = ctrl->p_mem_head;
1682                         res_lists.bus_head = ctrl->bus_head;
1683
1684                         cpqhp_return_board_resources(func, &res_lists);
1685
1686                         ctrl->io_head = res_lists.io_head;
1687                         ctrl->mem_head = res_lists.mem_head;
1688                         ctrl->p_mem_head = res_lists.p_mem_head;
1689                         ctrl->bus_head = res_lists.bus_head;
1690
1691                         cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1692                         cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1693                         cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1694                         cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1695
1696                         if (is_bridge(func)) {
1697                                 bridge_slot_remove(func);
1698                         } else
1699                                 slot_remove(func);
1700
1701                         func = cpqhp_slot_find(ctrl->bus, device, 0);
1702                 }
1703
1704                 /* Setup slot structure with entry for empty slot */
1705                 func = cpqhp_slot_create(ctrl->bus);
1706
1707                 if (func == NULL)
1708                         return 1;
1709
1710                 func->bus = ctrl->bus;
1711                 func->device = device;
1712                 func->function = 0;
1713                 func->configured = 0;
1714                 func->switch_save = 0x10;
1715                 func->is_a_board = 0;
1716                 func->p_task_event = NULL;
1717         }
1718
1719         return 0;
1720 }
1721
1722 static void pushbutton_helper_thread(unsigned long data)
1723 {
1724         pushbutton_pending = data;
1725         wake_up_process(cpqhp_event_thread);
1726 }
1727
1728
1729 /* this is the main worker thread */
1730 static int event_thread(void* data)
1731 {
1732         struct controller *ctrl;
1733
1734         while (1) {
1735                 dbg("!!!!event_thread sleeping\n");
1736                 set_current_state(TASK_INTERRUPTIBLE);
1737                 schedule();
1738
1739                 if (kthread_should_stop())
1740                         break;
1741                 /* Do stuff here */
1742                 if (pushbutton_pending)
1743                         cpqhp_pushbutton_thread(pushbutton_pending);
1744                 else
1745                         for (ctrl = cpqhp_ctrl_list; ctrl; ctrl=ctrl->next)
1746                                 interrupt_event_handler(ctrl);
1747         }
1748         dbg("event_thread signals exit\n");
1749         return 0;
1750 }
1751
1752 int cpqhp_event_start_thread(void)
1753 {
1754         cpqhp_event_thread = kthread_run(event_thread, NULL, "phpd_event");
1755         if (IS_ERR(cpqhp_event_thread)) {
1756                 err ("Can't start up our event thread\n");
1757                 return PTR_ERR(cpqhp_event_thread);
1758         }
1759
1760         return 0;
1761 }
1762
1763
1764 void cpqhp_event_stop_thread(void)
1765 {
1766         kthread_stop(cpqhp_event_thread);
1767 }
1768
1769
1770 static int update_slot_info(struct controller *ctrl, struct slot *slot)
1771 {
1772         struct hotplug_slot_info *info;
1773         int result;
1774
1775         info = kmalloc(sizeof(*info), GFP_KERNEL);
1776         if (!info)
1777                 return -ENOMEM;
1778
1779         info->power_status = get_slot_enabled(ctrl, slot);
1780         info->attention_status = cpq_get_attention_status(ctrl, slot);
1781         info->latch_status = cpq_get_latch_status(ctrl, slot);
1782         info->adapter_status = get_presence_status(ctrl, slot);
1783         result = pci_hp_change_slot_info(slot->hotplug_slot, info);
1784         kfree (info);
1785         return result;
1786 }
1787
1788 static void interrupt_event_handler(struct controller *ctrl)
1789 {
1790         int loop = 0;
1791         int change = 1;
1792         struct pci_func *func;
1793         u8 hp_slot;
1794         struct slot *p_slot;
1795
1796         while (change) {
1797                 change = 0;
1798
1799                 for (loop = 0; loop < 10; loop++) {
1800                         /* dbg("loop %d\n", loop); */
1801                         if (ctrl->event_queue[loop].event_type != 0) {
1802                                 hp_slot = ctrl->event_queue[loop].hp_slot;
1803
1804                                 func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
1805                                 if (!func)
1806                                         return;
1807
1808                                 p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1809                                 if (!p_slot)
1810                                         return;
1811
1812                                 dbg("hp_slot %d, func %p, p_slot %p\n",
1813                                     hp_slot, func, p_slot);
1814
1815                                 if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
1816                                         dbg("button pressed\n");
1817                                 } else if (ctrl->event_queue[loop].event_type ==
1818                                            INT_BUTTON_CANCEL) {
1819                                         dbg("button cancel\n");
1820                                         del_timer(&p_slot->task_event);
1821
1822                                         mutex_lock(&ctrl->crit_sect);
1823
1824                                         if (p_slot->state == BLINKINGOFF_STATE) {
1825                                                 /* slot is on */
1826                                                 dbg("turn on green LED\n");
1827                                                 green_LED_on (ctrl, hp_slot);
1828                                         } else if (p_slot->state == BLINKINGON_STATE) {
1829                                                 /* slot is off */
1830                                                 dbg("turn off green LED\n");
1831                                                 green_LED_off (ctrl, hp_slot);
1832                                         }
1833
1834                                         info(msg_button_cancel, p_slot->number);
1835
1836                                         p_slot->state = STATIC_STATE;
1837
1838                                         amber_LED_off (ctrl, hp_slot);
1839
1840                                         set_SOGO(ctrl);
1841
1842                                         /* Wait for SOBS to be unset */
1843                                         wait_for_ctrl_irq (ctrl);
1844
1845                                         mutex_unlock(&ctrl->crit_sect);
1846                                 }
1847                                 /*** button Released (No action on press...) */
1848                                 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
1849                                         dbg("button release\n");
1850
1851                                         if (is_slot_enabled (ctrl, hp_slot)) {
1852                                                 dbg("slot is on\n");
1853                                                 p_slot->state = BLINKINGOFF_STATE;
1854                                                 info(msg_button_off, p_slot->number);
1855                                         } else {
1856                                                 dbg("slot is off\n");
1857                                                 p_slot->state = BLINKINGON_STATE;
1858                                                 info(msg_button_on, p_slot->number);
1859                                         }
1860                                         mutex_lock(&ctrl->crit_sect);
1861
1862                                         dbg("blink green LED and turn off amber\n");
1863
1864                                         amber_LED_off (ctrl, hp_slot);
1865                                         green_LED_blink (ctrl, hp_slot);
1866
1867                                         set_SOGO(ctrl);
1868
1869                                         /* Wait for SOBS to be unset */
1870                                         wait_for_ctrl_irq (ctrl);
1871
1872                                         mutex_unlock(&ctrl->crit_sect);
1873                                         init_timer(&p_slot->task_event);
1874                                         p_slot->hp_slot = hp_slot;
1875                                         p_slot->ctrl = ctrl;
1876 /*                                      p_slot->physical_slot = physical_slot; */
1877                                         p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
1878                                         p_slot->task_event.function = pushbutton_helper_thread;
1879                                         p_slot->task_event.data = (u32) p_slot;
1880
1881                                         dbg("add_timer p_slot = %p\n", p_slot);
1882                                         add_timer(&p_slot->task_event);
1883                                 }
1884                                 /***********POWER FAULT */
1885                                 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
1886                                         dbg("power fault\n");
1887                                 } else {
1888                                         /* refresh notification */
1889                                         if (p_slot)
1890                                                 update_slot_info(ctrl, p_slot);
1891                                 }
1892
1893                                 ctrl->event_queue[loop].event_type = 0;
1894
1895                                 change = 1;
1896                         }
1897                 }               /* End of FOR loop */
1898         }
1899
1900         return;
1901 }
1902
1903
1904 /**
1905  * cpqhp_pushbutton_thread
1906  *
1907  * Scheduled procedure to handle blocking stuff for the pushbuttons
1908  * Handles all pending events and exits.
1909  *
1910  */
1911 void cpqhp_pushbutton_thread(unsigned long slot)
1912 {
1913         u8 hp_slot;
1914         u8 device;
1915         struct pci_func *func;
1916         struct slot *p_slot = (struct slot *) slot;
1917         struct controller *ctrl = (struct controller *) p_slot->ctrl;
1918
1919         pushbutton_pending = 0;
1920         hp_slot = p_slot->hp_slot;
1921
1922         device = p_slot->device;
1923
1924         if (is_slot_enabled(ctrl, hp_slot)) {
1925                 p_slot->state = POWEROFF_STATE;
1926                 /* power Down board */
1927                 func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1928                 dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl);
1929                 if (!func) {
1930                         dbg("Error! func NULL in %s\n", __FUNCTION__);
1931                         return ;
1932                 }
1933
1934                 if (cpqhp_process_SS(ctrl, func) != 0) {
1935                         amber_LED_on(ctrl, hp_slot);
1936                         green_LED_on(ctrl, hp_slot);
1937
1938                         set_SOGO(ctrl);
1939
1940                         /* Wait for SOBS to be unset */
1941                         wait_for_ctrl_irq(ctrl);
1942                 }
1943
1944                 p_slot->state = STATIC_STATE;
1945         } else {
1946                 p_slot->state = POWERON_STATE;
1947                 /* slot is off */
1948
1949                 func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1950                 dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl);
1951                 if (!func) {
1952                         dbg("Error! func NULL in %s\n", __FUNCTION__);
1953                         return ;
1954                 }
1955
1956                 if (func != NULL && ctrl != NULL) {
1957                         if (cpqhp_process_SI(ctrl, func) != 0) {
1958                                 amber_LED_on(ctrl, hp_slot);
1959                                 green_LED_off(ctrl, hp_slot);
1960
1961                                 set_SOGO(ctrl);
1962
1963                                 /* Wait for SOBS to be unset */
1964                                 wait_for_ctrl_irq (ctrl);
1965                         }
1966                 }
1967
1968                 p_slot->state = STATIC_STATE;
1969         }
1970
1971         return;
1972 }
1973
1974
1975 int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func)
1976 {
1977         u8 device, hp_slot;
1978         u16 temp_word;
1979         u32 tempdword;
1980         int rc;
1981         struct slot* p_slot;
1982         int physical_slot = 0;
1983
1984         tempdword = 0;
1985
1986         device = func->device;
1987         hp_slot = device - ctrl->slot_device_offset;
1988         p_slot = cpqhp_find_slot(ctrl, device);
1989         if (p_slot)
1990                 physical_slot = p_slot->number;
1991
1992         /* Check to see if the interlock is closed */
1993         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1994
1995         if (tempdword & (0x01 << hp_slot)) {
1996                 return 1;
1997         }
1998
1999         if (func->is_a_board) {
2000                 rc = board_replaced(func, ctrl);
2001         } else {
2002                 /* add board */
2003                 slot_remove(func);
2004
2005                 func = cpqhp_slot_create(ctrl->bus);
2006                 if (func == NULL)
2007                         return 1;
2008
2009                 func->bus = ctrl->bus;
2010                 func->device = device;
2011                 func->function = 0;
2012                 func->configured = 0;
2013                 func->is_a_board = 1;
2014
2015                 /* We have to save the presence info for these slots */
2016                 temp_word = ctrl->ctrl_int_comp >> 16;
2017                 func->presence_save = (temp_word >> hp_slot) & 0x01;
2018                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
2019
2020                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2021                         func->switch_save = 0;
2022                 } else {
2023                         func->switch_save = 0x10;
2024                 }
2025
2026                 rc = board_added(func, ctrl);
2027                 if (rc) {
2028                         if (is_bridge(func)) {
2029                                 bridge_slot_remove(func);
2030                         } else
2031                                 slot_remove(func);
2032
2033                         /* Setup slot structure with entry for empty slot */
2034                         func = cpqhp_slot_create(ctrl->bus);
2035
2036                         if (func == NULL)
2037                                 return 1;
2038
2039                         func->bus = ctrl->bus;
2040                         func->device = device;
2041                         func->function = 0;
2042                         func->configured = 0;
2043                         func->is_a_board = 0;
2044
2045                         /* We have to save the presence info for these slots */
2046                         temp_word = ctrl->ctrl_int_comp >> 16;
2047                         func->presence_save = (temp_word >> hp_slot) & 0x01;
2048                         func->presence_save |=
2049                         (temp_word >> (hp_slot + 7)) & 0x02;
2050
2051                         if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2052                                 func->switch_save = 0;
2053                         } else {
2054                                 func->switch_save = 0x10;
2055                         }
2056                 }
2057         }
2058
2059         if (rc) {
2060                 dbg("%s: rc = %d\n", __FUNCTION__, rc);
2061         }
2062
2063         if (p_slot)
2064                 update_slot_info(ctrl, p_slot);
2065
2066         return rc;
2067 }
2068
2069
2070 int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func)
2071 {
2072         u8 device, class_code, header_type, BCR;
2073         u8 index = 0;
2074         u8 replace_flag;
2075         u32 rc = 0;
2076         unsigned int devfn;
2077         struct slot* p_slot;
2078         struct pci_bus *pci_bus = ctrl->pci_bus;
2079         int physical_slot=0;
2080
2081         device = func->device;
2082         func = cpqhp_slot_find(ctrl->bus, device, index++);
2083         p_slot = cpqhp_find_slot(ctrl, device);
2084         if (p_slot) {
2085                 physical_slot = p_slot->number;
2086         }
2087
2088         /* Make sure there are no video controllers here */
2089         while (func && !rc) {
2090                 pci_bus->number = func->bus;
2091                 devfn = PCI_DEVFN(func->device, func->function);
2092
2093                 /* Check the Class Code */
2094                 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2095                 if (rc)
2096                         return rc;
2097
2098                 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2099                         /* Display/Video adapter (not supported) */
2100                         rc = REMOVE_NOT_SUPPORTED;
2101                 } else {
2102                         /* See if it's a bridge */
2103                         rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
2104                         if (rc)
2105                                 return rc;
2106
2107                         /* If it's a bridge, check the VGA Enable bit */
2108                         if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2109                                 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
2110                                 if (rc)
2111                                         return rc;
2112
2113                                 /* If the VGA Enable bit is set, remove isn't
2114                                  * supported */
2115                                 if (BCR & PCI_BRIDGE_CTL_VGA) {
2116                                         rc = REMOVE_NOT_SUPPORTED;
2117                                 }
2118                         }
2119                 }
2120
2121                 func = cpqhp_slot_find(ctrl->bus, device, index++);
2122         }
2123
2124         func = cpqhp_slot_find(ctrl->bus, device, 0);
2125         if ((func != NULL) && !rc) {
2126                 /* FIXME: Replace flag should be passed into process_SS */
2127                 replace_flag = !(ctrl->add_support);
2128                 rc = remove_board(func, replace_flag, ctrl);
2129         } else if (!rc) {
2130                 rc = 1;
2131         }
2132
2133         if (p_slot)
2134                 update_slot_info(ctrl, p_slot);
2135
2136         return rc;
2137 }
2138
2139 /**
2140  * switch_leds: switch the leds, go from one site to the other.
2141  * @ctrl: controller to use
2142  * @num_of_slots: number of slots to use
2143  * @direction: 1 to start from the left side, 0 to start right.
2144  */
2145 static void switch_leds(struct controller *ctrl, const int num_of_slots,
2146                         u32 *work_LED, const int direction)
2147 {
2148         int loop;
2149
2150         for (loop = 0; loop < num_of_slots; loop++) {
2151                 if (direction)
2152                         *work_LED = *work_LED >> 1;
2153                 else
2154                         *work_LED = *work_LED << 1;
2155                 writel(*work_LED, ctrl->hpc_reg + LED_CONTROL);
2156
2157                 set_SOGO(ctrl);
2158
2159                 /* Wait for SOGO interrupt */
2160                 wait_for_ctrl_irq(ctrl);
2161
2162                 /* Get ready for next iteration */
2163                 long_delay((2*HZ)/10);
2164         }
2165 }
2166
2167 /**
2168  * hardware_test - runs hardware tests
2169  *
2170  * For hot plug ctrl folks to play with.
2171  * test_num is the number written to the "test" file in sysfs
2172  *
2173  */
2174 int cpqhp_hardware_test(struct controller *ctrl, int test_num)
2175 {
2176         u32 save_LED;
2177         u32 work_LED;
2178         int loop;
2179         int num_of_slots;
2180
2181         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f;
2182
2183         switch (test_num) {
2184                 case 1:
2185                         /* Do stuff here! */
2186
2187                         /* Do that funky LED thing */
2188                         /* so we can restore them later */
2189                         save_LED = readl(ctrl->hpc_reg + LED_CONTROL);
2190                         work_LED = 0x01010101;
2191                         switch_leds(ctrl, num_of_slots, &work_LED, 0);
2192                         switch_leds(ctrl, num_of_slots, &work_LED, 1);
2193                         switch_leds(ctrl, num_of_slots, &work_LED, 0);
2194                         switch_leds(ctrl, num_of_slots, &work_LED, 1);
2195
2196                         work_LED = 0x01010000;
2197                         writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2198                         switch_leds(ctrl, num_of_slots, &work_LED, 0);
2199                         switch_leds(ctrl, num_of_slots, &work_LED, 1);
2200                         work_LED = 0x00000101;
2201                         writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2202                         switch_leds(ctrl, num_of_slots, &work_LED, 0);
2203                         switch_leds(ctrl, num_of_slots, &work_LED, 1);
2204
2205                         work_LED = 0x01010000;
2206                         writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2207                         for (loop = 0; loop < num_of_slots; loop++) {
2208                                 set_SOGO(ctrl);
2209
2210                                 /* Wait for SOGO interrupt */
2211                                 wait_for_ctrl_irq (ctrl);
2212
2213                                 /* Get ready for next iteration */
2214                                 long_delay((3*HZ)/10);
2215                                 work_LED = work_LED >> 16;
2216                                 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2217
2218                                 set_SOGO(ctrl);
2219
2220                                 /* Wait for SOGO interrupt */
2221                                 wait_for_ctrl_irq (ctrl);
2222
2223                                 /* Get ready for next iteration */
2224                                 long_delay((3*HZ)/10);
2225                                 work_LED = work_LED << 16;
2226                                 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2227                                 work_LED = work_LED << 1;
2228                                 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2229                         }
2230
2231                         /* put it back the way it was */
2232                         writel(save_LED, ctrl->hpc_reg + LED_CONTROL);
2233
2234                         set_SOGO(ctrl);
2235
2236                         /* Wait for SOBS to be unset */
2237                         wait_for_ctrl_irq (ctrl);
2238                         break;
2239                 case 2:
2240                         /* Do other stuff here! */
2241                         break;
2242                 case 3:
2243                         /* and more... */
2244                         break;
2245         }
2246         return 0;
2247 }
2248
2249
2250 /**
2251  * configure_new_device - Configures the PCI header information of one board.
2252  *
2253  * @ctrl: pointer to controller structure
2254  * @func: pointer to function structure
2255  * @behind_bridge: 1 if this is a recursive call, 0 if not
2256  * @resources: pointer to set of resource lists
2257  *
2258  * Returns 0 if success
2259  *
2260  */
2261 static u32 configure_new_device(struct controller * ctrl, struct pci_func * func,
2262                                  u8 behind_bridge, struct resource_lists * resources)
2263 {
2264         u8 temp_byte, function, max_functions, stop_it;
2265         int rc;
2266         u32 ID;
2267         struct pci_func *new_slot;
2268         int index;
2269
2270         new_slot = func;
2271
2272         dbg("%s\n", __FUNCTION__);
2273         /* Check for Multi-function device */
2274         ctrl->pci_bus->number = func->bus;
2275         rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
2276         if (rc) {
2277                 dbg("%s: rc = %d\n", __FUNCTION__, rc);
2278                 return rc;
2279         }
2280
2281         if (temp_byte & 0x80)   /* Multi-function device */
2282                 max_functions = 8;
2283         else
2284                 max_functions = 1;
2285
2286         function = 0;
2287
2288         do {
2289                 rc = configure_new_function(ctrl, new_slot, behind_bridge, resources);
2290
2291                 if (rc) {
2292                         dbg("configure_new_function failed %d\n",rc);
2293                         index = 0;
2294
2295                         while (new_slot) {
2296                                 new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++);
2297
2298                                 if (new_slot)
2299                                         cpqhp_return_board_resources(new_slot, resources);
2300                         }
2301
2302                         return rc;
2303                 }
2304
2305                 function++;
2306
2307                 stop_it = 0;
2308
2309                 /* The following loop skips to the next present function
2310                  * and creates a board structure */
2311
2312                 while ((function < max_functions) && (!stop_it)) {
2313                         pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
2314
2315                         if (ID == 0xFFFFFFFF) {   /* There's nothing there. */
2316                                 function++;
2317                         } else {  /* There's something there */
2318                                 /* Setup slot structure. */
2319                                 new_slot = cpqhp_slot_create(func->bus);
2320
2321                                 if (new_slot == NULL)
2322                                         return 1;
2323
2324                                 new_slot->bus = func->bus;
2325                                 new_slot->device = func->device;
2326                                 new_slot->function = function;
2327                                 new_slot->is_a_board = 1;
2328                                 new_slot->status = 0;
2329
2330                                 stop_it++;
2331                         }
2332                 }
2333
2334         } while (function < max_functions);
2335         dbg("returning from configure_new_device\n");
2336
2337         return 0;
2338 }
2339
2340
2341 /*
2342   Configuration logic that involves the hotplug data structures and
2343   their bookkeeping
2344  */
2345
2346
2347 /**
2348  * configure_new_function - Configures the PCI header information of one device
2349  *
2350  * @ctrl: pointer to controller structure
2351  * @func: pointer to function structure
2352  * @behind_bridge: 1 if this is a recursive call, 0 if not
2353  * @resources: pointer to set of resource lists
2354  *
2355  * Calls itself recursively for bridged devices.
2356  * Returns 0 if success
2357  *
2358  */
2359 static int configure_new_function(struct controller *ctrl, struct pci_func *func,
2360                                    u8 behind_bridge,
2361                                    struct resource_lists *resources)
2362 {
2363         int cloop;
2364         u8 IRQ = 0;
2365         u8 temp_byte;
2366         u8 device;
2367         u8 class_code;
2368         u16 command;
2369         u16 temp_word;
2370         u32 temp_dword;
2371         u32 rc;
2372         u32 temp_register;
2373         u32 base;
2374         u32 ID;
2375         unsigned int devfn;
2376         struct pci_resource *mem_node;
2377         struct pci_resource *p_mem_node;
2378         struct pci_resource *io_node;
2379         struct pci_resource *bus_node;
2380         struct pci_resource *hold_mem_node;
2381         struct pci_resource *hold_p_mem_node;
2382         struct pci_resource *hold_IO_node;
2383         struct pci_resource *hold_bus_node;
2384         struct irq_mapping irqs;
2385         struct pci_func *new_slot;
2386         struct pci_bus *pci_bus;
2387         struct resource_lists temp_resources;
2388
2389         pci_bus = ctrl->pci_bus;
2390         pci_bus->number = func->bus;
2391         devfn = PCI_DEVFN(func->device, func->function);
2392
2393         /* Check for Bridge */
2394         rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2395         if (rc)
2396                 return rc;
2397
2398         if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */
2399                 /* set Primary bus */
2400                 dbg("set Primary bus = %d\n", func->bus);
2401                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2402                 if (rc)
2403                         return rc;
2404
2405                 /* find range of busses to use */
2406                 dbg("find ranges of buses to use\n");
2407                 bus_node = get_max_resource(&(resources->bus_head), 1);
2408
2409                 /* If we don't have any busses to allocate, we can't continue */
2410                 if (!bus_node)
2411                         return -ENOMEM;
2412
2413                 /* set Secondary bus */
2414                 temp_byte = bus_node->base;
2415                 dbg("set Secondary bus = %d\n", bus_node->base);
2416                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2417                 if (rc)
2418                         return rc;
2419
2420                 /* set subordinate bus */
2421                 temp_byte = bus_node->base + bus_node->length - 1;
2422                 dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
2423                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2424                 if (rc)
2425                         return rc;
2426
2427                 /* set subordinate Latency Timer and base Latency Timer */
2428                 temp_byte = 0x40;
2429                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
2430                 if (rc)
2431                         return rc;
2432                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
2433                 if (rc)
2434                         return rc;
2435
2436                 /* set Cache Line size */
2437                 temp_byte = 0x08;
2438                 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
2439                 if (rc)
2440                         return rc;
2441
2442                 /* Setup the IO, memory, and prefetchable windows */
2443                 io_node = get_max_resource(&(resources->io_head), 0x1000);
2444                 if (!io_node)
2445                         return -ENOMEM;
2446                 mem_node = get_max_resource(&(resources->mem_head), 0x100000);
2447                 if (!mem_node)
2448                         return -ENOMEM;
2449                 p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000);
2450                 if (!p_mem_node)
2451                         return -ENOMEM;
2452                 dbg("Setup the IO, memory, and prefetchable windows\n");
2453                 dbg("io_node\n");
2454                 dbg("(base, len, next) (%x, %x, %p)\n", io_node->base,
2455                                         io_node->length, io_node->next);
2456                 dbg("mem_node\n");
2457                 dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base,
2458                                         mem_node->length, mem_node->next);
2459                 dbg("p_mem_node\n");
2460                 dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
2461                                         p_mem_node->length, p_mem_node->next);
2462
2463                 /* set up the IRQ info */
2464                 if (!resources->irqs) {
2465                         irqs.barber_pole = 0;
2466                         irqs.interrupt[0] = 0;
2467                         irqs.interrupt[1] = 0;
2468                         irqs.interrupt[2] = 0;
2469                         irqs.interrupt[3] = 0;
2470                         irqs.valid_INT = 0;
2471                 } else {
2472                         irqs.barber_pole = resources->irqs->barber_pole;
2473                         irqs.interrupt[0] = resources->irqs->interrupt[0];
2474                         irqs.interrupt[1] = resources->irqs->interrupt[1];
2475                         irqs.interrupt[2] = resources->irqs->interrupt[2];
2476                         irqs.interrupt[3] = resources->irqs->interrupt[3];
2477                         irqs.valid_INT = resources->irqs->valid_INT;
2478                 }
2479
2480                 /* set up resource lists that are now aligned on top and bottom
2481                  * for anything behind the bridge. */
2482                 temp_resources.bus_head = bus_node;
2483                 temp_resources.io_head = io_node;
2484                 temp_resources.mem_head = mem_node;
2485                 temp_resources.p_mem_head = p_mem_node;
2486                 temp_resources.irqs = &irqs;
2487
2488                 /* Make copies of the nodes we are going to pass down so that
2489                  * if there is a problem,we can just use these to free resources */
2490                 hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
2491                 hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
2492                 hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
2493                 hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
2494
2495                 if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2496                         kfree(hold_bus_node);
2497                         kfree(hold_IO_node);
2498                         kfree(hold_mem_node);
2499                         kfree(hold_p_mem_node);
2500
2501                         return 1;
2502                 }
2503
2504                 memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2505
2506                 bus_node->base += 1;
2507                 bus_node->length -= 1;
2508                 bus_node->next = NULL;
2509
2510                 /* If we have IO resources copy them and fill in the bridge's
2511                  * IO range registers */
2512                 if (io_node) {
2513                         memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2514                         io_node->next = NULL;
2515
2516                         /* set IO base and Limit registers */
2517                         temp_byte = io_node->base >> 8;
2518                         rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
2519
2520                         temp_byte = (io_node->base + io_node->length - 1) >> 8;
2521                         rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2522                 } else {
2523                         kfree(hold_IO_node);
2524                         hold_IO_node = NULL;
2525                 }
2526
2527                 /* If we have memory resources copy them and fill in the
2528                  * bridge's memory range registers.  Otherwise, fill in the
2529                  * range registers with values that disable them. */
2530                 if (mem_node) {
2531                         memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
2532                         mem_node->next = NULL;
2533
2534                         /* set Mem base and Limit registers */
2535                         temp_word = mem_node->base >> 16;
2536                         rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2537
2538                         temp_word = (mem_node->base + mem_node->length - 1) >> 16;
2539                         rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2540                 } else {
2541                         temp_word = 0xFFFF;
2542                         rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2543
2544                         temp_word = 0x0000;
2545                         rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2546
2547                         kfree(hold_mem_node);
2548                         hold_mem_node = NULL;
2549                 }
2550
2551                 memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
2552                 p_mem_node->next = NULL;
2553
2554                 /* set Pre Mem base and Limit registers */
2555                 temp_word = p_mem_node->base >> 16;
2556                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2557
2558                 temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16;
2559                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2560
2561                 /* Adjust this to compensate for extra adjustment in first loop */
2562                 irqs.barber_pole--;
2563
2564                 rc = 0;
2565
2566                 /* Here we actually find the devices and configure them */
2567                 for (device = 0; (device <= 0x1F) && !rc; device++) {
2568                         irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2569
2570                         ID = 0xFFFFFFFF;
2571                         pci_bus->number = hold_bus_node->base;
2572                         pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), 0x00, &ID);
2573                         pci_bus->number = func->bus;
2574
2575                         if (ID != 0xFFFFFFFF) {   /*  device present */
2576                                 /* Setup slot structure. */
2577                                 new_slot = cpqhp_slot_create(hold_bus_node->base);
2578
2579                                 if (new_slot == NULL) {
2580                                         rc = -ENOMEM;
2581                                         continue;
2582                                 }
2583
2584                                 new_slot->bus = hold_bus_node->base;
2585                                 new_slot->device = device;
2586                                 new_slot->function = 0;
2587                                 new_slot->is_a_board = 1;
2588                                 new_slot->status = 0;
2589
2590                                 rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
2591                                 dbg("configure_new_device rc=0x%x\n",rc);
2592                         }       /* End of IF (device in slot?) */
2593                 }               /* End of FOR loop */
2594
2595                 if (rc)
2596                         goto free_and_out;
2597                 /* save the interrupt routing information */
2598                 if (resources->irqs) {
2599                         resources->irqs->interrupt[0] = irqs.interrupt[0];
2600                         resources->irqs->interrupt[1] = irqs.interrupt[1];
2601                         resources->irqs->interrupt[2] = irqs.interrupt[2];
2602                         resources->irqs->interrupt[3] = irqs.interrupt[3];
2603                         resources->irqs->valid_INT = irqs.valid_INT;
2604                 } else if (!behind_bridge) {
2605                         /* We need to hook up the interrupts here */
2606                         for (cloop = 0; cloop < 4; cloop++) {
2607                                 if (irqs.valid_INT & (0x01 << cloop)) {
2608                                         rc = cpqhp_set_irq(func->bus, func->device,
2609                                                            0x0A + cloop, irqs.interrupt[cloop]);
2610                                         if (rc)
2611                                                 goto free_and_out;
2612                                 }
2613                         }       /* end of for loop */
2614                 }
2615                 /* Return unused bus resources
2616                  * First use the temporary node to store information for
2617                  * the board */
2618                 if (hold_bus_node && bus_node && temp_resources.bus_head) {
2619                         hold_bus_node->length = bus_node->base - hold_bus_node->base;
2620
2621                         hold_bus_node->next = func->bus_head;
2622                         func->bus_head = hold_bus_node;
2623
2624                         temp_byte = temp_resources.bus_head->base - 1;
2625
2626                         /* set subordinate bus */
2627                         rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2628
2629                         if (temp_resources.bus_head->length == 0) {
2630                                 kfree(temp_resources.bus_head);
2631                                 temp_resources.bus_head = NULL;
2632                         } else {
2633                                 return_resource(&(resources->bus_head), temp_resources.bus_head);
2634                         }
2635                 }
2636
2637                 /* If we have IO space available and there is some left,
2638                  * return the unused portion */
2639                 if (hold_IO_node && temp_resources.io_head) {
2640                         io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2641                                                                &hold_IO_node, 0x1000);
2642
2643                         /* Check if we were able to split something off */
2644                         if (io_node) {
2645                                 hold_IO_node->base = io_node->base + io_node->length;
2646
2647                                 temp_byte = (hold_IO_node->base) >> 8;
2648                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2649
2650                                 return_resource(&(resources->io_head), io_node);
2651                         }
2652
2653                         io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2654
2655                         /* Check if we were able to split something off */
2656                         if (io_node) {
2657                                 /* First use the temporary node to store
2658                                  * information for the board */
2659                                 hold_IO_node->length = io_node->base - hold_IO_node->base;
2660
2661                                 /* If we used any, add it to the board's list */
2662                                 if (hold_IO_node->length) {
2663                                         hold_IO_node->next = func->io_head;
2664                                         func->io_head = hold_IO_node;
2665
2666                                         temp_byte = (io_node->base - 1) >> 8;
2667                                         rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2668
2669                                         return_resource(&(resources->io_head), io_node);
2670                                 } else {
2671                                         /* it doesn't need any IO */
2672                                         temp_word = 0x0000;
2673                                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_LIMIT, temp_word);
2674
2675                                         return_resource(&(resources->io_head), io_node);
2676                                         kfree(hold_IO_node);
2677                                 }
2678                         } else {
2679                                 /* it used most of the range */
2680                                 hold_IO_node->next = func->io_head;
2681                                 func->io_head = hold_IO_node;
2682                         }
2683                 } else if (hold_IO_node) {
2684                         /* it used the whole range */
2685                         hold_IO_node->next = func->io_head;
2686                         func->io_head = hold_IO_node;
2687                 }
2688                 /* If we have memory space available and there is some left,
2689                  * return the unused portion */
2690                 if (hold_mem_node && temp_resources.mem_head) {
2691                         mem_node = do_pre_bridge_resource_split(&(temp_resources.  mem_head),
2692                                                                 &hold_mem_node, 0x100000);
2693
2694                         /* Check if we were able to split something off */
2695                         if (mem_node) {
2696                                 hold_mem_node->base = mem_node->base + mem_node->length;
2697
2698                                 temp_word = (hold_mem_node->base) >> 16;
2699                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2700
2701                                 return_resource(&(resources->mem_head), mem_node);
2702                         }
2703
2704                         mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000);
2705
2706                         /* Check if we were able to split something off */
2707                         if (mem_node) {
2708                                 /* First use the temporary node to store
2709                                  * information for the board */
2710                                 hold_mem_node->length = mem_node->base - hold_mem_node->base;
2711
2712                                 if (hold_mem_node->length) {
2713                                         hold_mem_node->next = func->mem_head;
2714                                         func->mem_head = hold_mem_node;
2715
2716                                         /* configure end address */
2717                                         temp_word = (mem_node->base - 1) >> 16;
2718                                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2719
2720                                         /* Return unused resources to the pool */
2721                                         return_resource(&(resources->mem_head), mem_node);
2722                                 } else {
2723                                         /* it doesn't need any Mem */
2724                                         temp_word = 0x0000;
2725                                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2726
2727                                         return_resource(&(resources->mem_head), mem_node);
2728                                         kfree(hold_mem_node);
2729                                 }
2730                         } else {
2731                                 /* it used most of the range */
2732                                 hold_mem_node->next = func->mem_head;
2733                                 func->mem_head = hold_mem_node;
2734                         }
2735                 } else if (hold_mem_node) {
2736                         /* it used the whole range */
2737                         hold_mem_node->next = func->mem_head;
2738                         func->mem_head = hold_mem_node;
2739                 }
2740                 /* If we have prefetchable memory space available and there
2741                  * is some left at the end, return the unused portion */
2742                 if (hold_p_mem_node && temp_resources.p_mem_head) {
2743                         p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2744                                                                   &hold_p_mem_node, 0x100000);
2745
2746                         /* Check if we were able to split something off */
2747                         if (p_mem_node) {
2748                                 hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2749
2750                                 temp_word = (hold_p_mem_node->base) >> 16;
2751                                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2752
2753                                 return_resource(&(resources->p_mem_head), p_mem_node);
2754                         }
2755
2756                         p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000);
2757
2758                         /* Check if we were able to split something off */
2759                         if (p_mem_node) {
2760                                 /* First use the temporary node to store
2761                                  * information for the board */
2762                                 hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2763
2764                                 /* If we used any, add it to the board's list */
2765                                 if (hold_p_mem_node->length) {
2766                                         hold_p_mem_node->next = func->p_mem_head;
2767                                         func->p_mem_head = hold_p_mem_node;
2768
2769                                         temp_word = (p_mem_node->base - 1) >> 16;
2770                                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2771
2772                                         return_resource(&(resources->p_mem_head), p_mem_node);
2773                                 } else {
2774                                         /* it doesn't need any PMem */
2775                                         temp_word = 0x0000;
2776                                         rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2777
2778                                         return_resource(&(resources->p_mem_head), p_mem_node);
2779                                         kfree(hold_p_mem_node);
2780                                 }
2781                         } else {
2782                                 /* it used the most of the range */
2783                                 hold_p_mem_node->next = func->p_mem_head;
2784                                 func->p_mem_head = hold_p_mem_node;
2785                         }
2786                 } else if (hold_p_mem_node) {
2787                         /* it used the whole range */
2788                         hold_p_mem_node->next = func->p_mem_head;
2789                         func->p_mem_head = hold_p_mem_node;
2790                 }
2791                 /* We should be configuring an IRQ and the bridge's base address
2792                  * registers if it needs them.  Although we have never seen such
2793                  * a device */
2794
2795                 /* enable card */
2796                 command = 0x0157;       /* = PCI_COMMAND_IO |
2797                                          *   PCI_COMMAND_MEMORY |
2798                                          *   PCI_COMMAND_MASTER |
2799                                          *   PCI_COMMAND_INVALIDATE |
2800                                          *   PCI_COMMAND_PARITY |
2801                                          *   PCI_COMMAND_SERR */
2802                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_COMMAND, command);
2803
2804                 /* set Bridge Control Register */
2805                 command = 0x07;         /* = PCI_BRIDGE_CTL_PARITY |
2806                                          *   PCI_BRIDGE_CTL_SERR |
2807                                          *   PCI_BRIDGE_CTL_NO_ISA */
2808                 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
2809         } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2810                 /* Standard device */
2811                 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2812
2813                 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2814                         /* Display (video) adapter (not supported) */
2815                         return DEVICE_TYPE_NOT_SUPPORTED;
2816                 }
2817                 /* Figure out IO and memory needs */
2818                 for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
2819                         temp_register = 0xFFFFFFFF;
2820
2821                         dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop);
2822                         rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
2823
2824                         rc = pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp_register);
2825                         dbg("CND: base = 0x%x\n", temp_register);
2826
2827                         if (temp_register) {      /* If this register is implemented */
2828                                 if ((temp_register & 0x03L) == 0x01) {
2829                                         /* Map IO */
2830
2831                                         /* set base = amount of IO space */
2832                                         base = temp_register & 0xFFFFFFFC;
2833                                         base = ~base + 1;
2834
2835                                         dbg("CND:      length = 0x%x\n", base);
2836                                         io_node = get_io_resource(&(resources->io_head), base);
2837                                         dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
2838                                             io_node->base, io_node->length, io_node->next);
2839                                         dbg("func (%p) io_head (%p)\n", func, func->io_head);
2840
2841                                         /* allocate the resource to the board */
2842                                         if (io_node) {
2843                                                 base = io_node->base;
2844
2845                                                 io_node->next = func->io_head;
2846                                                 func->io_head = io_node;
2847                                         } else
2848                                                 return -ENOMEM;
2849                                 } else if ((temp_register & 0x0BL) == 0x08) {
2850                                         /* Map prefetchable memory */
2851                                         base = temp_register & 0xFFFFFFF0;
2852                                         base = ~base + 1;
2853
2854                                         dbg("CND:      length = 0x%x\n", base);
2855                                         p_mem_node = get_resource(&(resources->p_mem_head), base);
2856
2857                                         /* allocate the resource to the board */
2858                                         if (p_mem_node) {
2859                                                 base = p_mem_node->base;
2860
2861                                                 p_mem_node->next = func->p_mem_head;
2862                                                 func->p_mem_head = p_mem_node;
2863                                         } else
2864                                                 return -ENOMEM;
2865                                 } else if ((temp_register & 0x0BL) == 0x00) {
2866                                         /* Map memory */
2867                                         base = temp_register & 0xFFFFFFF0;
2868                                         base = ~base + 1;
2869
2870                                         dbg("CND:      length = 0x%x\n", base);
2871                                         mem_node = get_resource(&(resources->mem_head), base);
2872
2873                                         /* allocate the resource to the board */
2874                                         if (mem_node) {
2875                                                 base = mem_node->base;
2876
2877                                                 mem_node->next = func->mem_head;
2878                                                 func->mem_head = mem_node;
2879                                         } else
2880                                                 return -ENOMEM;
2881                                 } else if ((temp_register & 0x0BL) == 0x04) {
2882                                         /* Map memory */
2883                                         base = temp_register & 0xFFFFFFF0;
2884                                         base = ~base + 1;
2885
2886                                         dbg("CND:      length = 0x%x\n", base);
2887                                         mem_node = get_resource(&(resources->mem_head), base);
2888
2889                                         /* allocate the resource to the board */
2890                                         if (mem_node) {
2891                                                 base = mem_node->base;
2892
2893                                                 mem_node->next = func->mem_head;
2894                                                 func->mem_head = mem_node;
2895                                         } else
2896                                                 return -ENOMEM;
2897                                 } else if ((temp_register & 0x0BL) == 0x06) {
2898                                         /* Those bits are reserved, we can't handle this */
2899                                         return 1;
2900                                 } else {
2901                                         /* Requesting space below 1M */
2902                                         return NOT_ENOUGH_RESOURCES;
2903                                 }
2904
2905                                 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2906
2907                                 /* Check for 64-bit base */
2908                                 if ((temp_register & 0x07L) == 0x04) {
2909                                         cloop += 4;
2910
2911                                         /* Upper 32 bits of address always zero
2912                                          * on today's systems */
2913                                         /* FIXME this is probably not true on
2914                                          * Alpha and ia64??? */
2915                                         base = 0;
2916                                         rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2917                                 }
2918                         }
2919                 }               /* End of base register loop */
2920                 if (cpqhp_legacy_mode) {
2921                         /* Figure out which interrupt pin this function uses */
2922                         rc = pci_bus_read_config_byte (pci_bus, devfn,
2923                                 PCI_INTERRUPT_PIN, &temp_byte);
2924
2925                         /* If this function needs an interrupt and we are behind
2926                          * a bridge and the pin is tied to something that's
2927                          * alread mapped, set this one the same */
2928                         if (temp_byte && resources->irqs &&
2929                             (resources->irqs->valid_INT &
2930                              (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
2931                                 /* We have to share with something already set up */
2932                                 IRQ = resources->irqs->interrupt[(temp_byte +
2933                                         resources->irqs->barber_pole - 1) & 0x03];
2934                         } else {
2935                                 /* Program IRQ based on card type */
2936                                 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2937
2938                                 if (class_code == PCI_BASE_CLASS_STORAGE) {
2939                                         IRQ = cpqhp_disk_irq;
2940                                 } else {
2941                                         IRQ = cpqhp_nic_irq;
2942                                 }
2943                         }
2944
2945                         /* IRQ Line */
2946                         rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
2947                 }
2948
2949                 if (!behind_bridge) {
2950                         rc = cpqhp_set_irq(func->bus, func->device, temp_byte + 0x09, IRQ);
2951                         if (rc)
2952                                 return 1;
2953                 } else {
2954                         /* TBD - this code may also belong in the other clause
2955                          * of this If statement */
2956                         resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
2957                         resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
2958                 }
2959
2960                 /* Latency Timer */
2961                 temp_byte = 0x40;
2962                 rc = pci_bus_write_config_byte(pci_bus, devfn,
2963                                         PCI_LATENCY_TIMER, temp_byte);
2964
2965                 /* Cache Line size */
2966                 temp_byte = 0x08;
2967                 rc = pci_bus_write_config_byte(pci_bus, devfn,
2968                                         PCI_CACHE_LINE_SIZE, temp_byte);
2969
2970                 /* disable ROM base Address */
2971                 temp_dword = 0x00L;
2972                 rc = pci_bus_write_config_word(pci_bus, devfn,
2973                                         PCI_ROM_ADDRESS, temp_dword);
2974
2975                 /* enable card */
2976                 temp_word = 0x0157;     /* = PCI_COMMAND_IO |
2977                                          *   PCI_COMMAND_MEMORY |
2978                                          *   PCI_COMMAND_MASTER |
2979                                          *   PCI_COMMAND_INVALIDATE |
2980                                          *   PCI_COMMAND_PARITY |
2981                                          *   PCI_COMMAND_SERR */
2982                 rc = pci_bus_write_config_word (pci_bus, devfn,
2983                                         PCI_COMMAND, temp_word);
2984         } else {                /* End of Not-A-Bridge else */
2985                 /* It's some strange type of PCI adapter (Cardbus?) */
2986                 return DEVICE_TYPE_NOT_SUPPORTED;
2987         }
2988
2989         func->configured = 1;
2990
2991         return 0;
2992 free_and_out:
2993         cpqhp_destroy_resource_list (&temp_resources);
2994
2995         return_resource(&(resources-> bus_head), hold_bus_node);
2996         return_resource(&(resources-> io_head), hold_IO_node);
2997         return_resource(&(resources-> mem_head), hold_mem_node);
2998         return_resource(&(resources-> p_mem_head), hold_p_mem_node);
2999         return rc;
3000 }