drivers/pci/hotplug/cpqphp_pci.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/config.h>
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/types.h>
  33 #include <linux/slab.h>
  34 #include <linux/workqueue.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/pci.h>
  37 #include "../pci.h"
  38 #include "cpqphp.h"
  39 #include "cpqphp_nvram.h"
  40 #include "../../../arch/i386/pci/pci.h" /* horrible hack showing how processor dependent we are... */
  41
  42
  43 u8 cpqhp_nic_irq;
  44 u8 cpqhp_disk_irq;
  45
  46 static u16 unused_IRQ;
  47
  48 /*
  49  * detect_HRT_floating_pointer
  50  *
  51  * find the Hot Plug Resource Table in the specified region of memory.
  52  *
  53  */
  54 static void __iomem *detect_HRT_floating_pointer(void __iomem *begin, void __iomem *end)
  55 {
  56         void __iomem *fp;
  57         void __iomem *endp;
  58         u8 temp1, temp2, temp3, temp4;
  59         int status = 0;
  60
  61         endp = (end - sizeof(struct hrt) + 1);
  62
  63         for (fp = begin; fp <= endp; fp += 16) {
  64                 temp1 = readb(fp + SIG0);
  65                 temp2 = readb(fp + SIG1);
  66                 temp3 = readb(fp + SIG2);
  67                 temp4 = readb(fp + SIG3);
  68                 if (temp1 == '$' &&
  69                     temp2 == 'H' &&
  70                     temp3 == 'R' &&
  71                     temp4 == 'T') {
  72                         status = 1;
  73                         break;
  74                 }
  75         }
  76
  77         if (!status)
  78                 fp = NULL;
  79
  80         dbg("Discovered Hotplug Resource Table at %p\n", fp);
  81         return fp;
  82 }
  83
  84
  85 int cpqhp_configure_device (struct controller* ctrl, struct pci_func* func)
  86 {
  87         unsigned char bus;
  88         struct pci_bus *child;
  89         int num;
  90
  91         if (func->pci_dev == NULL)
  92                 func->pci_dev = pci_find_slot(func->bus, PCI_DEVFN(func->device, func->function));
  93
  94         /* No pci device, we need to create it then */
  95         if (func->pci_dev == NULL) {
  96                 dbg("INFO: pci_dev still null\n");
  97
  98                 num = pci_scan_slot(ctrl->pci_dev->bus, PCI_DEVFN(func->device, func->function));
  99                 if (num)
 100                         pci_bus_add_devices(ctrl->pci_dev->bus);
 101
 102                 func->pci_dev = pci_find_slot(func->bus, PCI_DEVFN(func->device, func->function));
 103                 if (func->pci_dev == NULL) {
 104                         dbg("ERROR: pci_dev still null\n");
 105                         return 0;
 106                 }
 107         }
 108
 109         if (func->pci_dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
 110                 pci_read_config_byte(func->pci_dev, PCI_SECONDARY_BUS, &bus);
 111                 child = (struct pci_bus*) pci_add_new_bus(func->pci_dev->bus, (func->pci_dev), bus);
 112                 pci_do_scan_bus(child);
 113         }
 114
 115         return 0;
 116 }
 117
 118
 119 int cpqhp_unconfigure_device(struct pci_func* func)
 120 {
 121         int j;
 122
 123         dbg("%s: bus/dev/func = %x/%x/%x\n", __FUNCTION__, func->bus, func->device, func->function);
 124
 125         for (j=0; j<8 ; j++) {
 126                 struct pci_dev* temp = pci_find_slot(func->bus, PCI_DEVFN(func->device, j));
 127                 if (temp)
 128                         pci_remove_bus_device(temp);
 129         }
 130         return 0;
 131 }
 132
 133 static int PCI_RefinedAccessConfig(struct pci_bus *bus, unsigned int devfn, u8 offset, u32 *value)
 134 {
 135         u32 vendID = 0;
 136
 137         if (pci_bus_read_config_dword (bus, devfn, PCI_VENDOR_ID, &vendID) == -1)
 138                 return -1;
 139         if (vendID == 0xffffffff)
 140                 return -1;
 141         return pci_bus_read_config_dword (bus, devfn, offset, value);
 142 }
 143
 144
 145 /*
 146  * cpqhp_set_irq
 147  *
 148  * @bus_num: bus number of PCI device
 149  * @dev_num: device number of PCI device
 150  * @slot: pointer to u8 where slot number will be returned
 151  */
 152 int cpqhp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num)
 153 {
 154         int rc = 0;
 155
 156         if (cpqhp_legacy_mode) {
 157                 struct pci_dev *fakedev;
 158                 struct pci_bus *fakebus;
 159                 u16 temp_word;
 160
 161                 fakedev = kmalloc(sizeof(*fakedev), GFP_KERNEL);
 162                 fakebus = kmalloc(sizeof(*fakebus), GFP_KERNEL);
 163                 if (!fakedev || !fakebus) {
 164                         kfree(fakedev);
 165                         kfree(fakebus);
 166                         return -ENOMEM;
 167                 }
 168
 169                 fakedev->devfn = dev_num << 3;
 170                 fakedev->bus = fakebus;
 171                 fakebus->number = bus_num;
 172                 dbg("%s: dev %d, bus %d, pin %d, num %d\n",
 173                     __FUNCTION__, dev_num, bus_num, int_pin, irq_num);
 174                 rc = pcibios_set_irq_routing(fakedev, int_pin - 0x0a, irq_num);
 175                 kfree(fakedev);
 176                 kfree(fakebus);
 177                 dbg("%s: rc %d\n", __FUNCTION__, rc);
 178                 if (!rc)
 179                         return !rc;
 180
 181                 // set the Edge Level Control Register (ELCR)
 182                 temp_word = inb(0x4d0);
 183                 temp_word |= inb(0x4d1) << 8;
 184
 185                 temp_word |= 0x01 << irq_num;
 186
 187                 // This should only be for x86 as it sets the Edge Level Control Register
 188                 outb((u8) (temp_word & 0xFF), 0x4d0);
 189                 outb((u8) ((temp_word & 0xFF00) >> 8), 0x4d1);
 190                 rc = 0;
 191         }
 192
 193         return rc;
 194 }
 195
 196
 197 /*
 198  * WTF??? This function isn't in the code, yet a function calls it, but the
 199  * compiler optimizes it away?  strange.  Here as a placeholder to keep the
 200  * compiler happy.
 201  */
 202 static int PCI_ScanBusNonBridge (u8 bus, u8 device)
 203 {
 204         return 0;
 205 }
 206
 207 static int PCI_ScanBusForNonBridge(struct controller *ctrl, u8 bus_num, u8 * dev_num)
 208 {
 209         u16 tdevice;
 210         u32 work;
 211         u8 tbus;
 212
 213         ctrl->pci_bus->number = bus_num;
 214
 215         for (tdevice = 0; tdevice < 0xFF; tdevice++) {
 216                 //Scan for access first
 217                 if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
 218                         continue;
 219                 dbg("Looking for nonbridge bus_num %d dev_num %d\n", bus_num, tdevice);
 220                 //Yep we got one. Not a bridge ?
 221                 if ((work >> 8) != PCI_TO_PCI_BRIDGE_CLASS) {
 222                         *dev_num = tdevice;
 223                         dbg("found it !\n");
 224                         return 0;
 225                 }
 226         }
 227         for (tdevice = 0; tdevice < 0xFF; tdevice++) {
 228                 //Scan for access first
 229                 if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
 230                         continue;
 231                 dbg("Looking for bridge bus_num %d dev_num %d\n", bus_num, tdevice);
 232                 //Yep we got one. bridge ?
 233                 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 234                         pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(tdevice, 0), PCI_SECONDARY_BUS, &tbus);
 235                         dbg("Recurse on bus_num %d tdevice %d\n", tbus, tdevice);
 236                         if (PCI_ScanBusNonBridge(tbus, tdevice) == 0)
 237                                 return 0;
 238                 }
 239         }
 240
 241         return -1;
 242 }
 243
 244
 245 static int PCI_GetBusDevHelper(struct controller *ctrl, u8 *bus_num, u8 *dev_num, u8 slot, u8 nobridge)
 246 {
 247         struct irq_routing_table *PCIIRQRoutingInfoLength;
 248         long len;
 249         long loop;
 250         u32 work;
 251
 252         u8 tbus, tdevice, tslot;
 253
 254         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
 255         if (!PCIIRQRoutingInfoLength)
 256                 return -1;
 257
 258         len = (PCIIRQRoutingInfoLength->size -
 259                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
 260         // Make sure I got at least one entry
 261         if (len == 0) {
 262                 if (PCIIRQRoutingInfoLength != NULL)
 263                         kfree(PCIIRQRoutingInfoLength );
 264                 return -1;
 265         }
 266
 267         for (loop = 0; loop < len; ++loop) {
 268                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
 269                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn;
 270                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
 271
 272                 if (tslot == slot) {
 273                         *bus_num = tbus;
 274                         *dev_num = tdevice;
 275                         ctrl->pci_bus->number = tbus;
 276                         pci_bus_read_config_dword (ctrl->pci_bus, *dev_num, PCI_VENDOR_ID, &work);
 277                         if (!nobridge || (work == 0xffffffff)) {
 278                                 if (PCIIRQRoutingInfoLength != NULL)
 279                                         kfree(PCIIRQRoutingInfoLength );
 280                                 return 0;
 281                         }
 282
 283                         dbg("bus_num %d devfn %d\n", *bus_num, *dev_num);
 284                         pci_bus_read_config_dword (ctrl->pci_bus, *dev_num, PCI_CLASS_REVISION, &work);
 285                         dbg("work >> 8 (%x) = BRIDGE (%x)\n", work >> 8, PCI_TO_PCI_BRIDGE_CLASS);
 286
 287                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 288                                 pci_bus_read_config_byte (ctrl->pci_bus, *dev_num, PCI_SECONDARY_BUS, &tbus);
 289                                 dbg("Scan bus for Non Bridge: bus %d\n", tbus);
 290                                 if (PCI_ScanBusForNonBridge(ctrl, tbus, dev_num) == 0) {
 291                                         *bus_num = tbus;
 292                                         if (PCIIRQRoutingInfoLength != NULL)
 293                                                 kfree(PCIIRQRoutingInfoLength );
 294                                         return 0;
 295                                 }
 296                         } else {
 297                                 if (PCIIRQRoutingInfoLength != NULL)
 298                                         kfree(PCIIRQRoutingInfoLength );
 299                                 return 0;
 300                         }
 301
 302                 }
 303         }
 304         if (PCIIRQRoutingInfoLength != NULL)
 305                 kfree(PCIIRQRoutingInfoLength );
 306         return -1;
 307 }
 308
 309
 310 int cpqhp_get_bus_dev (struct controller *ctrl, u8 * bus_num, u8 * dev_num, u8 slot)
 311 {
 312         return PCI_GetBusDevHelper(ctrl, bus_num, dev_num, slot, 0);    //plain (bridges allowed)
 313 }
 314
 315
 316 /* More PCI configuration routines; this time centered around hotplug controller */
 317
 318
 319 /*
 320  * cpqhp_save_config
 321  *
 322  * Reads configuration for all slots in a PCI bus and saves info.
 323  *
 324  * Note:  For non-hot plug busses, the slot # saved is the device #
 325  *
 326  * returns 0 if success
 327  */
 328 int cpqhp_save_config(struct controller *ctrl, int busnumber, int is_hot_plug)
 329 {
 330         long rc;
 331         u8 class_code;
 332         u8 header_type;
 333         u32 ID;
 334         u8 secondary_bus;
 335         struct pci_func *new_slot;
 336         int sub_bus;
 337         int FirstSupported;
 338         int LastSupported;
 339         int max_functions;
 340         int function;
 341         u8 DevError;
 342         int device = 0;
 343         int cloop = 0;
 344         int stop_it;
 345         int index;
 346
 347         //              Decide which slots are supported
 348
 349         if (is_hot_plug) {
 350                 //*********************************
 351                 // is_hot_plug is the slot mask
 352                 //*********************************
 353                 FirstSupported = is_hot_plug >> 4;
 354                 LastSupported = FirstSupported + (is_hot_plug & 0x0F) - 1;
 355         } else {
 356                 FirstSupported = 0;
 357                 LastSupported = 0x1F;
 358         }
 359
 360         //     Save PCI configuration space for all devices in supported slots
 361         ctrl->pci_bus->number = busnumber;
 362         for (device = FirstSupported; device <= LastSupported; device++) {
 363                 ID = 0xFFFFFFFF;
 364                 rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);
 365
 366                 if (ID != 0xFFFFFFFF) {   //  device in slot
 367                         rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, 0), 0x0B, &class_code);
 368                         if (rc)
 369                                 return rc;
 370
 371                         rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_HEADER_TYPE, &header_type);
 372                         if (rc)
 373                                 return rc;
 374
 375                         // If multi-function device, set max_functions to 8
 376                         if (header_type & 0x80)
 377                                 max_functions = 8;
 378                         else
 379                                 max_functions = 1;
 380
 381                         function = 0;
 382
 383                         do {
 384                                 DevError = 0;
 385
 386                                 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {   // P-P Bridge
 387                                         //  Recurse the subordinate bus
 388                                         //  get the subordinate bus number
 389                                         rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_SECONDARY_BUS, &secondary_bus);
 390                                         if (rc) {
 391                                                 return rc;
 392                                         } else {
 393                                                 sub_bus = (int) secondary_bus;
 394
 395                                                 // Save secondary bus cfg spc
 396                                                 // with this recursive call.
 397                                                 rc = cpqhp_save_config(ctrl, sub_bus, 0);
 398                                                 if (rc)
 399                                                         return rc;
 400                                                 ctrl->pci_bus->number = busnumber;
 401                                         }
 402                                 }
 403
 404                                 index = 0;
 405                                 new_slot = cpqhp_slot_find(busnumber, device, index++);
 406                                 while (new_slot &&
 407                                        (new_slot->function != (u8) function))
 408                                         new_slot = cpqhp_slot_find(busnumber, device, index++);
 409
 410                                 if (!new_slot) {
 411                                         // Setup slot structure.
 412                                         new_slot = cpqhp_slot_create(busnumber);
 413
 414                                         if (new_slot == NULL)
 415                                                 return(1);
 416                                 }
 417
 418                                 new_slot->bus = (u8) busnumber;
 419                                 new_slot->device = (u8) device;
 420                                 new_slot->function = (u8) function;
 421                                 new_slot->is_a_board = 1;
 422                                 new_slot->switch_save = 0x10;
 423                                 // In case of unsupported board
 424                                 new_slot->status = DevError;
 425                                 new_slot->pci_dev = pci_find_slot(new_slot->bus, (new_slot->device << 3) | new_slot->function);
 426
 427                                 for (cloop = 0; cloop < 0x20; cloop++) {
 428                                         rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, function), cloop << 2, (u32 *) & (new_slot-> config_space [cloop]));
 429                                         if (rc)
 430                                                 return rc;
 431                                 }
 432
 433                                 function++;
 434
 435                                 stop_it = 0;
 436
 437                                 //  this loop skips to the next present function
 438                                 //  reading in Class Code and Header type.
 439
 440                                 while ((function < max_functions)&&(!stop_it)) {
 441                                         rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_VENDOR_ID, &ID);
 442                                         if (ID == 0xFFFFFFFF) {  // nothing there.
 443                                                 function++;
 444                                         } else {  // Something there
 445                                                 rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), 0x0B, &class_code);
 446                                                 if (rc)
 447                                                         return rc;
 448
 449                                                 rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_HEADER_TYPE, &header_type);
 450                                                 if (rc)
 451                                                         return rc;
 452
 453                                                 stop_it++;
 454                                         }
 455                                 }
 456
 457                         } while (function < max_functions);
 458                 }               // End of IF (device in slot?)
 459                 else if (is_hot_plug) {
 460                         // Setup slot structure with entry for empty slot
 461                         new_slot = cpqhp_slot_create(busnumber);
 462
 463                         if (new_slot == NULL) {
 464                                 return(1);
 465                         }
 466
 467                         new_slot->bus = (u8) busnumber;
 468                         new_slot->device = (u8) device;
 469                         new_slot->function = 0;
 470                         new_slot->is_a_board = 0;
 471                         new_slot->presence_save = 0;
 472                         new_slot->switch_save = 0;
 473                 }
 474         }                       // End of FOR loop
 475
 476         return(0);
 477 }
 478
 479
 480 /*
 481  * cpqhp_save_slot_config
 482  *
 483  * Saves configuration info for all PCI devices in a given slot
 484  * including subordinate busses.
 485  *
 486  * returns 0 if success
 487  */
 488 int cpqhp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot)
 489 {
 490         long rc;
 491         u8 class_code;
 492         u8 header_type;
 493         u32 ID;
 494         u8 secondary_bus;
 495         int sub_bus;
 496         int max_functions;
 497         int function;
 498         int cloop = 0;
 499         int stop_it;
 500
 501         ID = 0xFFFFFFFF;
 502
 503         ctrl->pci_bus->number = new_slot->bus;
 504         pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_VENDOR_ID, &ID);
 505
 506         if (ID != 0xFFFFFFFF) {   //  device in slot
 507                 pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), 0x0B, &class_code);
 508                 pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_HEADER_TYPE, &header_type);
 509
 510                 if (header_type & 0x80) // Multi-function device
 511                         max_functions = 8;
 512                 else
 513                         max_functions = 1;
 514
 515                 function = 0;
 516
 517                 do {
 518                         if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {     // PCI-PCI Bridge
 519                                 //  Recurse the subordinate bus
 520                                 pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_SECONDARY_BUS, &secondary_bus);
 521
 522                                 sub_bus = (int) secondary_bus;
 523
 524                                 // Save the config headers for the secondary bus.
 525                                 rc = cpqhp_save_config(ctrl, sub_bus, 0);
 526                                 if (rc)
 527                                         return(rc);
 528                                 ctrl->pci_bus->number = new_slot->bus;
 529
 530                         }       // End of IF
 531
 532                         new_slot->status = 0;
 533
 534                         for (cloop = 0; cloop < 0x20; cloop++) {
 535                                 pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), cloop << 2, (u32 *) & (new_slot-> config_space [cloop]));
 536                         }
 537
 538                         function++;
 539
 540                         stop_it = 0;
 541
 542                         //  this loop skips to the next present function
 543                         //  reading in the Class Code and the Header type.
 544
 545                         while ((function < max_functions) && (!stop_it)) {
 546                                 pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_VENDOR_ID, &ID);
 547
 548                                 if (ID == 0xFFFFFFFF) {  // nothing there.
 549                                         function++;
 550                                 } else {  // Something there
 551                                         pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), 0x0B, &class_code);
 552
 553                                         pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_HEADER_TYPE, &header_type);
 554
 555                                         stop_it++;
 556                                 }
 557                         }
 558
 559                 } while (function < max_functions);
 560         }                       // End of IF (device in slot?)
 561         else {
 562                 return 2;
 563         }
 564
 565         return 0;
 566 }
 567
 568
 569 /*
 570  * cpqhp_save_base_addr_length
 571  *
 572  * Saves the length of all base address registers for the
 573  * specified slot.  this is for hot plug REPLACE
 574  *
 575  * returns 0 if success
 576  */
 577 int cpqhp_save_base_addr_length(struct controller *ctrl, struct pci_func * func)
 578 {
 579         u8 cloop;
 580         u8 header_type;
 581         u8 secondary_bus;
 582         u8 type;
 583         int sub_bus;
 584         u32 temp_register;
 585         u32 base;
 586         u32 rc;
 587         struct pci_func *next;
 588         int index = 0;
 589         struct pci_bus *pci_bus = ctrl->pci_bus;
 590         unsigned int devfn;
 591
 592         func = cpqhp_slot_find(func->bus, func->device, index++);
 593
 594         while (func != NULL) {
 595                 pci_bus->number = func->bus;
 596                 devfn = PCI_DEVFN(func->device, func->function);
 597
 598                 // Check for Bridge
 599                 pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
 600
 601                 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
 602                         // PCI-PCI Bridge
 603                         pci_bus_read_config_byte (pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
 604
 605                         sub_bus = (int) secondary_bus;
 606
 607                         next = cpqhp_slot_list[sub_bus];
 608
 609                         while (next != NULL) {
 610                                 rc = cpqhp_save_base_addr_length(ctrl, next);
 611                                 if (rc)
 612                                         return rc;
 613
 614                                 next = next->next;
 615                         }
 616                         pci_bus->number = func->bus;
 617
 618                         //FIXME: this loop is duplicated in the non-bridge case.  The two could be rolled together
 619                         // Figure out IO and memory base lengths
 620                         for (cloop = 0x10; cloop <= 0x14; cloop += 4) {
 621                                 temp_register = 0xFFFFFFFF;
 622                                 pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
 623                                 pci_bus_read_config_dword (pci_bus, devfn, cloop, &base);
 624
 625                                 if (base) {  // If this register is implemented
 626                                         if (base & 0x01L) {
 627                                                 // IO base
 628                                                 // set base = amount of IO space requested
 629                                                 base = base & 0xFFFFFFFE;
 630                                                 base = (~base) + 1;
 631
 632                                                 type = 1;
 633                                         } else {
 634                                                 // memory base
 635                                                 base = base & 0xFFFFFFF0;
 636                                                 base = (~base) + 1;
 637
 638                                                 type = 0;
 639                                         }
 640                                 } else {
 641                                         base = 0x0L;
 642                                         type = 0;
 643                                 }
 644
 645                                 // Save information in slot structure
 646                                 func->base_length[(cloop - 0x10) >> 2] =
 647                                 base;
 648                                 func->base_type[(cloop - 0x10) >> 2] = type;
 649
 650                         }       // End of base register loop
 651
 652
 653                 } else if ((header_type & 0x7F) == 0x00) {        // PCI-PCI Bridge
 654                         // Figure out IO and memory base lengths
 655                         for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
 656                                 temp_register = 0xFFFFFFFF;
 657                                 pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
 658                                 pci_bus_read_config_dword (pci_bus, devfn, cloop, &base);
 659
 660                                 if (base) {  // If this register is implemented
 661                                         if (base & 0x01L) {
 662                                                 // IO base
 663                                                 // base = amount of IO space requested
 664                                                 base = base & 0xFFFFFFFE;
 665                                                 base = (~base) + 1;
 666
 667                                                 type = 1;
 668                                         } else {
 669                                                 // memory base
 670                                                 // base = amount of memory space requested
 671                                                 base = base & 0xFFFFFFF0;
 672                                                 base = (~base) + 1;
 673
 674                                                 type = 0;
 675                                         }
 676                                 } else {
 677                                         base = 0x0L;
 678                                         type = 0;
 679                                 }
 680
 681                                 // Save information in slot structure
 682                                 func->base_length[(cloop - 0x10) >> 2] = base;
 683                                 func->base_type[(cloop - 0x10) >> 2] = type;
 684
 685                         }       // End of base register loop
 686
 687                 } else {          // Some other unknown header type
 688                 }
 689
 690                 // find the next device in this slot
 691                 func = cpqhp_slot_find(func->bus, func->device, index++);
 692         }
 693
 694         return(0);
 695 }
 696
 697
 698 /*
 699  * cpqhp_save_used_resources
 700  *
 701  * Stores used resource information for existing boards.  this is
 702  * for boards that were in the system when this driver was loaded.
 703  * this function is for hot plug ADD
 704  *
 705  * returns 0 if success
 706  */
 707 int cpqhp_save_used_resources (struct controller *ctrl, struct pci_func * func)
 708 {
 709         u8 cloop;
 710         u8 header_type;
 711         u8 secondary_bus;
 712         u8 temp_byte;
 713         u8 b_base;
 714         u8 b_length;
 715         u16 command;
 716         u16 save_command;
 717         u16 w_base;
 718         u16 w_length;
 719         u32 temp_register;
 720         u32 save_base;
 721         u32 base;
 722         int index = 0;
 723         struct pci_resource *mem_node;
 724         struct pci_resource *p_mem_node;
 725         struct pci_resource *io_node;
 726         struct pci_resource *bus_node;
 727         struct pci_bus *pci_bus = ctrl->pci_bus;
 728         unsigned int devfn;
 729
 730         func = cpqhp_slot_find(func->bus, func->device, index++);
 731
 732         while ((func != NULL) && func->is_a_board) {
 733                 pci_bus->number = func->bus;
 734                 devfn = PCI_DEVFN(func->device, func->function);
 735
 736                 // Save the command register
 737                 pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &save_command);
 738
 739                 // disable card
 740                 command = 0x00;
 741                 pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
 742
 743                 // Check for Bridge
 744                 pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
 745
 746                 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {     // PCI-PCI Bridge
 747                         // Clear Bridge Control Register
 748                         command = 0x00;
 749                         pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
 750                         pci_bus_read_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
 751                         pci_bus_read_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, &temp_byte);
 752
 753                         bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL);
 754                         if (!bus_node)
 755                                 return -ENOMEM;
 756
 757                         bus_node->base = secondary_bus;
 758                         bus_node->length = temp_byte - secondary_bus + 1;
 759
 760                         bus_node->next = func->bus_head;
 761                         func->bus_head = bus_node;
 762
 763                         // Save IO base and Limit registers
 764                         pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_BASE, &b_base);
 765                         pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_LIMIT, &b_length);
 766
 767                         if ((b_base <= b_length) && (save_command & 0x01)) {
 768                                 io_node = kmalloc(sizeof(*io_node), GFP_KERNEL);
 769                                 if (!io_node)
 770                                         return -ENOMEM;
 771
 772                                 io_node->base = (b_base & 0xF0) << 8;
 773                                 io_node->length = (b_length - b_base + 0x10) << 8;
 774
 775                                 io_node->next = func->io_head;
 776                                 func->io_head = io_node;
 777                         }
 778
 779                         // Save memory base and Limit registers
 780                         pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_BASE, &w_base);
 781                         pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, &w_length);
 782
 783                         if ((w_base <= w_length) && (save_command & 0x02)) {
 784                                 mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL);
 785                                 if (!mem_node)
 786                                         return -ENOMEM;
 787
 788                                 mem_node->base = w_base << 16;
 789                                 mem_node->length = (w_length - w_base + 0x10) << 16;
 790
 791                                 mem_node->next = func->mem_head;
 792                                 func->mem_head = mem_node;
 793                         }
 794
 795                         // Save prefetchable memory base and Limit registers
 796                         pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, &w_base);
 797                         pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &w_length);
 798
 799                         if ((w_base <= w_length) && (save_command & 0x02)) {
 800                                 p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL);
 801                                 if (!p_mem_node)
 802                                         return -ENOMEM;
 803
 804                                 p_mem_node->base = w_base << 16;
 805                                 p_mem_node->length = (w_length - w_base + 0x10) << 16;
 806
 807                                 p_mem_node->next = func->p_mem_head;
 808                                 func->p_mem_head = p_mem_node;
 809                         }
 810                         // Figure out IO and memory base lengths
 811                         for (cloop = 0x10; cloop <= 0x14; cloop += 4) {
 812                                 pci_bus_read_config_dword (pci_bus, devfn, cloop, &save_base);
 813
 814                                 temp_register = 0xFFFFFFFF;
 815                                 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
 816                                 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
 817
 818                                 temp_register = base;
 819
 820                                 if (base) {  // If this register is implemented
 821                                         if (((base & 0x03L) == 0x01)
 822                                             && (save_command & 0x01)) {
 823                                                 // IO base
 824                                                 // set temp_register = amount of IO space requested
 825                                                 temp_register = base & 0xFFFFFFFE;
 826                                                 temp_register = (~temp_register) + 1;
 827
 828                                                 io_node = kmalloc(sizeof(*io_node),
 829                                                                 GFP_KERNEL);
 830                                                 if (!io_node)
 831                                                         return -ENOMEM;
 832
 833                                                 io_node->base =
 834                                                 save_base & (~0x03L);
 835                                                 io_node->length = temp_register;
 836
 837                                                 io_node->next = func->io_head;
 838                                                 func->io_head = io_node;
 839                                         } else
 840                                                 if (((base & 0x0BL) == 0x08)
 841                                                     && (save_command & 0x02)) {
 842                                                 // prefetchable memory base
 843                                                 temp_register = base & 0xFFFFFFF0;
 844                                                 temp_register = (~temp_register) + 1;
 845
 846                                                 p_mem_node = kmalloc(sizeof(*p_mem_node),
 847                                                                 GFP_KERNEL);
 848                                                 if (!p_mem_node)
 849                                                         return -ENOMEM;
 850
 851                                                 p_mem_node->base = save_base & (~0x0FL);
 852                                                 p_mem_node->length = temp_register;
 853
 854                                                 p_mem_node->next = func->p_mem_head;
 855                                                 func->p_mem_head = p_mem_node;
 856                                         } else
 857                                                 if (((base & 0x0BL) == 0x00)
 858                                                     && (save_command & 0x02)) {
 859                                                 // prefetchable memory base
 860                                                 temp_register = base & 0xFFFFFFF0;
 861                                                 temp_register = (~temp_register) + 1;
 862
 863                                                 mem_node = kmalloc(sizeof(*mem_node),
 864                                                                 GFP_KERNEL);
 865                                                 if (!mem_node)
 866                                                         return -ENOMEM;
 867
 868                                                 mem_node->base = save_base & (~0x0FL);
 869                                                 mem_node->length = temp_register;
 870
 871                                                 mem_node->next = func->mem_head;
 872                                                 func->mem_head = mem_node;
 873                                         } else
 874                                                 return(1);
 875                                 }
 876                         }       // End of base register loop
 877                 } else if ((header_type & 0x7F) == 0x00) {        // Standard header
 878                         // Figure out IO and memory base lengths
 879                         for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
 880                                 pci_bus_read_config_dword(pci_bus, devfn, cloop, &save_base);
 881
 882                                 temp_register = 0xFFFFFFFF;
 883                                 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
 884                                 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
 885
 886                                 temp_register = base;
 887
 888                                 if (base) {       // If this register is implemented
 889                                         if (((base & 0x03L) == 0x01)
 890                                             && (save_command & 0x01)) {
 891                                                 // IO base
 892                                                 // set temp_register = amount of IO space requested
 893                                                 temp_register = base & 0xFFFFFFFE;
 894                                                 temp_register = (~temp_register) + 1;
 895
 896                                                 io_node = kmalloc(sizeof(*io_node),
 897                                                                 GFP_KERNEL);
 898                                                 if (!io_node)
 899                                                         return -ENOMEM;
 900
 901                                                 io_node->base = save_base & (~0x01L);
 902                                                 io_node->length = temp_register;
 903
 904                                                 io_node->next = func->io_head;
 905                                                 func->io_head = io_node;
 906                                         } else
 907                                                 if (((base & 0x0BL) == 0x08)
 908                                                     && (save_command & 0x02)) {
 909                                                 // prefetchable memory base
 910                                                 temp_register = base & 0xFFFFFFF0;
 911                                                 temp_register = (~temp_register) + 1;
 912
 913                                                 p_mem_node = kmalloc(sizeof(*p_mem_node),
 914                                                                 GFP_KERNEL);
 915                                                 if (!p_mem_node)
 916                                                         return -ENOMEM;
 917
 918                                                 p_mem_node->base = save_base & (~0x0FL);
 919                                                 p_mem_node->length = temp_register;
 920
 921                                                 p_mem_node->next = func->p_mem_head;
 922                                                 func->p_mem_head = p_mem_node;
 923                                         } else
 924                                                 if (((base & 0x0BL) == 0x00)
 925                                                     && (save_command & 0x02)) {
 926                                                 // prefetchable memory base
 927                                                 temp_register = base & 0xFFFFFFF0;
 928                                                 temp_register = (~temp_register) + 1;
 929
 930                                                 mem_node = kmalloc(sizeof(*mem_node),
 931                                                                 GFP_KERNEL);
 932                                                 if (!mem_node)
 933                                                         return -ENOMEM;
 934
 935                                                 mem_node->base = save_base & (~0x0FL);
 936                                                 mem_node->length = temp_register;
 937
 938                                                 mem_node->next = func->mem_head;
 939                                                 func->mem_head = mem_node;
 940                                         } else
 941                                                 return(1);
 942                                 }
 943                         }       // End of base register loop
 944                 } else {          // Some other unknown header type
 945                 }
 946
 947                 // find the next device in this slot
 948                 func = cpqhp_slot_find(func->bus, func->device, index++);
 949         }
 950
 951         return(0);
 952 }
 953
 954
 955 /*
 956  * cpqhp_configure_board
 957  *
 958  * Copies saved configuration information to one slot.
 959  * this is called recursively for bridge devices.
 960  * this is for hot plug REPLACE!
 961  *
 962  * returns 0 if success
 963  */
 964 int cpqhp_configure_board(struct controller *ctrl, struct pci_func * func)
 965 {
 966         int cloop;
 967         u8 header_type;
 968         u8 secondary_bus;
 969         int sub_bus;
 970         struct pci_func *next;
 971         u32 temp;
 972         u32 rc;
 973         int index = 0;
 974         struct pci_bus *pci_bus = ctrl->pci_bus;
 975         unsigned int devfn;
 976
 977         func = cpqhp_slot_find(func->bus, func->device, index++);
 978
 979         while (func != NULL) {
 980                 pci_bus->number = func->bus;
 981                 devfn = PCI_DEVFN(func->device, func->function);
 982
 983                 // Start at the top of config space so that the control
 984                 // registers are programmed last
 985                 for (cloop = 0x3C; cloop > 0; cloop -= 4) {
 986                         pci_bus_write_config_dword (pci_bus, devfn, cloop, func->config_space[cloop >> 2]);
 987                 }
 988
 989                 pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
 990
 991                 // If this is a bridge device, restore subordinate devices
 992                 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {     // PCI-PCI Bridge
 993                         pci_bus_read_config_byte (pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
 994
 995                         sub_bus = (int) secondary_bus;
 996
 997                         next = cpqhp_slot_list[sub_bus];
 998
 999                         while (next != NULL) {
1000                                 rc = cpqhp_configure_board(ctrl, next);
1001                                 if (rc)
1002                                         return rc;
1003
1004                                 next = next->next;
1005                         }
1006                 } else {
1007
1008                         // Check all the base Address Registers to make sure
1009                         // they are the same.  If not, the board is different.
1010
1011                         for (cloop = 16; cloop < 40; cloop += 4) {
1012                                 pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp);
1013
1014                                 if (temp != func->config_space[cloop >> 2]) {
1015                                         dbg("Config space compare failure!!! offset = %x\n", cloop);
1016                                         dbg("bus = %x, device = %x, function = %x\n", func->bus, func->device, func->function);
1017                                         dbg("temp = %x, config space = %x\n\n", temp, func->config_space[cloop >> 2]);
1018                                         return 1;
1019                                 }
1020                         }
1021                 }
1022
1023                 func->configured = 1;
1024
1025                 func = cpqhp_slot_find(func->bus, func->device, index++);
1026         }
1027
1028         return 0;
1029 }
1030
1031
1032 /*
1033  * cpqhp_valid_replace
1034  *
1035  * this function checks to see if a board is the same as the
1036  * one it is replacing.  this check will detect if the device's
1037  * vendor or device id's are the same
1038  *
1039  * returns 0 if the board is the same nonzero otherwise
1040  */
1041 int cpqhp_valid_replace(struct controller *ctrl, struct pci_func * func)
1042 {
1043         u8 cloop;
1044         u8 header_type;
1045         u8 secondary_bus;
1046         u8 type;
1047         u32 temp_register = 0;
1048         u32 base;
1049         u32 rc;
1050         struct pci_func *next;
1051         int index = 0;
1052         struct pci_bus *pci_bus = ctrl->pci_bus;
1053         unsigned int devfn;
1054
1055         if (!func->is_a_board)
1056                 return(ADD_NOT_SUPPORTED);
1057
1058         func = cpqhp_slot_find(func->bus, func->device, index++);
1059
1060         while (func != NULL) {
1061                 pci_bus->number = func->bus;
1062                 devfn = PCI_DEVFN(func->device, func->function);
1063
1064                 pci_bus_read_config_dword (pci_bus, devfn, PCI_VENDOR_ID, &temp_register);
1065
1066                 // No adapter present
1067                 if (temp_register == 0xFFFFFFFF)
1068                         return(NO_ADAPTER_PRESENT);
1069
1070                 if (temp_register != func->config_space[0])
1071                         return(ADAPTER_NOT_SAME);
1072
1073                 // Check for same revision number and class code
1074                 pci_bus_read_config_dword (pci_bus, devfn, PCI_CLASS_REVISION, &temp_register);
1075
1076                 // Adapter not the same
1077                 if (temp_register != func->config_space[0x08 >> 2])
1078                         return(ADAPTER_NOT_SAME);
1079
1080                 // Check for Bridge
1081                 pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
1082
1083                 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {     // PCI-PCI Bridge
1084                         // In order to continue checking, we must program the
1085                         // bus registers in the bridge to respond to accesses
1086                         // for it's subordinate bus(es)
1087
1088                         temp_register = func->config_space[0x18 >> 2];
1089                         pci_bus_write_config_dword (pci_bus, devfn, PCI_PRIMARY_BUS, temp_register);
1090
1091                         secondary_bus = (temp_register >> 8) & 0xFF;
1092
1093                         next = cpqhp_slot_list[secondary_bus];
1094
1095                         while (next != NULL) {
1096                                 rc = cpqhp_valid_replace(ctrl, next);
1097                                 if (rc)
1098                                         return rc;
1099
1100                                 next = next->next;
1101                         }
1102
1103                 }
1104                 // Check to see if it is a standard config header
1105                 else if ((header_type & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
1106                         // Check subsystem vendor and ID
1107                         pci_bus_read_config_dword (pci_bus, devfn, PCI_SUBSYSTEM_VENDOR_ID, &temp_register);
1108
1109                         if (temp_register != func->config_space[0x2C >> 2]) {
1110                                 // If it's a SMART-2 and the register isn't filled
1111                                 // in, ignore the difference because
1112                                 // they just have an old rev of the firmware
1113
1114                                 if (!((func->config_space[0] == 0xAE100E11)
1115                                       && (temp_register == 0x00L)))
1116                                         return(ADAPTER_NOT_SAME);
1117                         }
1118                         // Figure out IO and memory base lengths
1119                         for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
1120                                 temp_register = 0xFFFFFFFF;
1121                                 pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
1122                                 pci_bus_read_config_dword (pci_bus, devfn, cloop, &base);
1123                                 if (base) {       // If this register is implemented
1124                                         if (base & 0x01L) {
1125                                                 // IO base
1126                                                 // set base = amount of IO space requested
1127                                                 base = base & 0xFFFFFFFE;
1128                                                 base = (~base) + 1;
1129
1130                                                 type = 1;
1131                                         } else {
1132                                                 // memory base
1133                                                 base = base & 0xFFFFFFF0;
1134                                                 base = (~base) + 1;
1135
1136                                                 type = 0;
1137                                         }
1138                                 } else {
1139                                         base = 0x0L;
1140                                         type = 0;
1141                                 }
1142
1143                                 // Check information in slot structure
1144                                 if (func->base_length[(cloop - 0x10) >> 2] != base)
1145                                         return(ADAPTER_NOT_SAME);
1146
1147                                 if (func->base_type[(cloop - 0x10) >> 2] != type)
1148                                         return(ADAPTER_NOT_SAME);
1149
1150                         }       // End of base register loop
1151
1152                 }               // End of (type 0 config space) else
1153                 else {
1154                         // this is not a type 0 or 1 config space header so
1155                         // we don't know how to do it
1156                         return(DEVICE_TYPE_NOT_SUPPORTED);
1157                 }
1158
1159                 // Get the next function
1160                 func = cpqhp_slot_find(func->bus, func->device, index++);
1161         }
1162
1163
1164         return 0;
1165 }
1166
1167
1168 /*
1169  * cpqhp_find_available_resources
1170  *
1171  * Finds available memory, IO, and IRQ resources for programming
1172  * devices which may be added to the system
1173  * this function is for hot plug ADD!
1174  *
1175  * returns 0 if success
1176  */
1177 int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_start)
1178 {
1179         u8 temp;
1180         u8 populated_slot;
1181         u8 bridged_slot;
1182         void __iomem *one_slot;
1183         void __iomem *rom_resource_table;
1184         struct pci_func *func = NULL;
1185         int i = 10, index;
1186         u32 temp_dword, rc;
1187         struct pci_resource *mem_node;
1188         struct pci_resource *p_mem_node;
1189         struct pci_resource *io_node;
1190         struct pci_resource *bus_node;
1191
1192         rom_resource_table = detect_HRT_floating_pointer(rom_start, rom_start+0xffff);
1193         dbg("rom_resource_table = %p\n", rom_resource_table);
1194
1195         if (rom_resource_table == NULL) {
1196                 return -ENODEV;
1197         }
1198         // Sum all resources and setup resource maps
1199         unused_IRQ = readl(rom_resource_table + UNUSED_IRQ);
1200         dbg("unused_IRQ = %x\n", unused_IRQ);
1201
1202         temp = 0;
1203         while (unused_IRQ) {
1204                 if (unused_IRQ & 1) {
1205                         cpqhp_disk_irq = temp;
1206                         break;
1207                 }
1208                 unused_IRQ = unused_IRQ >> 1;
1209                 temp++;
1210         }
1211
1212         dbg("cpqhp_disk_irq= %d\n", cpqhp_disk_irq);
1213         unused_IRQ = unused_IRQ >> 1;
1214         temp++;
1215
1216         while (unused_IRQ) {
1217                 if (unused_IRQ & 1) {
1218                         cpqhp_nic_irq = temp;
1219                         break;
1220                 }
1221                 unused_IRQ = unused_IRQ >> 1;
1222                 temp++;
1223         }
1224
1225         dbg("cpqhp_nic_irq= %d\n", cpqhp_nic_irq);
1226         unused_IRQ = readl(rom_resource_table + PCIIRQ);
1227
1228         temp = 0;
1229
1230         if (!cpqhp_nic_irq) {
1231                 cpqhp_nic_irq = ctrl->cfgspc_irq;
1232         }
1233
1234         if (!cpqhp_disk_irq) {
1235                 cpqhp_disk_irq = ctrl->cfgspc_irq;
1236         }
1237
1238         dbg("cpqhp_disk_irq, cpqhp_nic_irq= %d, %d\n", cpqhp_disk_irq, cpqhp_nic_irq);
1239
1240         rc = compaq_nvram_load(rom_start, ctrl);
1241         if (rc)
1242                 return rc;
1243
1244         one_slot = rom_resource_table + sizeof (struct hrt);
1245
1246         i = readb(rom_resource_table + NUMBER_OF_ENTRIES);
1247         dbg("number_of_entries = %d\n", i);
1248
1249         if (!readb(one_slot + SECONDARY_BUS))
1250                 return 1;
1251
1252         dbg("dev|IO base|length|Mem base|length|Pre base|length|PB SB MB\n");
1253
1254         while (i && readb(one_slot + SECONDARY_BUS)) {
1255                 u8 dev_func = readb(one_slot + DEV_FUNC);
1256                 u8 primary_bus = readb(one_slot + PRIMARY_BUS);
1257                 u8 secondary_bus = readb(one_slot + SECONDARY_BUS);
1258                 u8 max_bus = readb(one_slot + MAX_BUS);
1259                 u16 io_base = readw(one_slot + IO_BASE);
1260                 u16 io_length = readw(one_slot + IO_LENGTH);
1261                 u16 mem_base = readw(one_slot + MEM_BASE);
1262                 u16 mem_length = readw(one_slot + MEM_LENGTH);
1263                 u16 pre_mem_base = readw(one_slot + PRE_MEM_BASE);
1264                 u16 pre_mem_length = readw(one_slot + PRE_MEM_LENGTH);
1265
1266                 dbg("%2.2x | %4.4x  | %4.4x | %4.4x   | %4.4x | %4.4x   | %4.4x |%2.2x %2.2x %2.2x\n",
1267                     dev_func, io_base, io_length, mem_base, mem_length, pre_mem_base, pre_mem_length,
1268                     primary_bus, secondary_bus, max_bus);
1269
1270                 // If this entry isn't for our controller's bus, ignore it
1271                 if (primary_bus != ctrl->bus) {
1272                         i--;
1273                         one_slot += sizeof (struct slot_rt);
1274                         continue;
1275                 }
1276                 // find out if this entry is for an occupied slot
1277                 ctrl->pci_bus->number = primary_bus;
1278                 pci_bus_read_config_dword (ctrl->pci_bus, dev_func, PCI_VENDOR_ID, &temp_dword);
1279                 dbg("temp_D_word = %x\n", temp_dword);
1280
1281                 if (temp_dword != 0xFFFFFFFF) {
1282                         index = 0;
1283                         func = cpqhp_slot_find(primary_bus, dev_func >> 3, 0);
1284
1285                         while (func && (func->function != (dev_func & 0x07))) {
1286                                 dbg("func = %p (bus, dev, fun) = (%d, %d, %d)\n", func, primary_bus, dev_func >> 3, index);
1287                                 func = cpqhp_slot_find(primary_bus, dev_func >> 3, index++);
1288                         }
1289
1290                         // If we can't find a match, skip this table entry
1291                         if (!func) {
1292                                 i--;
1293                                 one_slot += sizeof (struct slot_rt);
1294                                 continue;
1295                         }
1296                         // this may not work and shouldn't be used
1297                         if (secondary_bus != primary_bus)
1298                                 bridged_slot = 1;
1299                         else
1300                                 bridged_slot = 0;
1301
1302                         populated_slot = 1;
1303                 } else {
1304                         populated_slot = 0;
1305                         bridged_slot = 0;
1306                 }
1307
1308
1309                 // If we've got a valid IO base, use it
1310
1311                 temp_dword = io_base + io_length;
1312
1313                 if ((io_base) && (temp_dword < 0x10000)) {
1314                         io_node = kmalloc(sizeof(*io_node), GFP_KERNEL);
1315                         if (!io_node)
1316                                 return -ENOMEM;
1317
1318                         io_node->base = io_base;
1319                         io_node->length = io_length;
1320
1321                         dbg("found io_node(base, length) = %x, %x\n",
1322                                         io_node->base, io_node->length);
1323                         dbg("populated slot =%d \n", populated_slot);
1324                         if (!populated_slot) {
1325                                 io_node->next = ctrl->io_head;
1326                                 ctrl->io_head = io_node;
1327                         } else {
1328                                 io_node->next = func->io_head;
1329                                 func->io_head = io_node;
1330                         }
1331                 }
1332
1333                 // If we've got a valid memory base, use it
1334                 temp_dword = mem_base + mem_length;
1335                 if ((mem_base) && (temp_dword < 0x10000)) {
1336                         mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL);
1337                         if (!mem_node)
1338                                 return -ENOMEM;
1339
1340                         mem_node->base = mem_base << 16;
1341
1342                         mem_node->length = mem_length << 16;
1343
1344                         dbg("found mem_node(base, length) = %x, %x\n",
1345                                         mem_node->base, mem_node->length);
1346                         dbg("populated slot =%d \n", populated_slot);
1347                         if (!populated_slot) {
1348                                 mem_node->next = ctrl->mem_head;
1349                                 ctrl->mem_head = mem_node;
1350                         } else {
1351                                 mem_node->next = func->mem_head;
1352                                 func->mem_head = mem_node;
1353                         }
1354                 }
1355
1356                 // If we've got a valid prefetchable memory base, and
1357                 // the base + length isn't greater than 0xFFFF
1358                 temp_dword = pre_mem_base + pre_mem_length;
1359                 if ((pre_mem_base) && (temp_dword < 0x10000)) {
1360                         p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL);
1361                         if (!p_mem_node)
1362                                 return -ENOMEM;
1363
1364                         p_mem_node->base = pre_mem_base << 16;
1365
1366                         p_mem_node->length = pre_mem_length << 16;
1367                         dbg("found p_mem_node(base, length) = %x, %x\n",
1368                                         p_mem_node->base, p_mem_node->length);
1369                         dbg("populated slot =%d \n", populated_slot);
1370
1371                         if (!populated_slot) {
1372                                 p_mem_node->next = ctrl->p_mem_head;
1373                                 ctrl->p_mem_head = p_mem_node;
1374                         } else {
1375                                 p_mem_node->next = func->p_mem_head;
1376                                 func->p_mem_head = p_mem_node;
1377                         }
1378                 }
1379
1380                 // If we've got a valid bus number, use it
1381                 // The second condition is to ignore bus numbers on
1382                 // populated slots that don't have PCI-PCI bridges
1383                 if (secondary_bus && (secondary_bus != primary_bus)) {
1384                         bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL);
1385                         if (!bus_node)
1386                                 return -ENOMEM;
1387
1388                         bus_node->base = secondary_bus;
1389                         bus_node->length = max_bus - secondary_bus + 1;
1390                         dbg("found bus_node(base, length) = %x, %x\n",
1391                                         bus_node->base, bus_node->length);
1392                         dbg("populated slot =%d \n", populated_slot);
1393                         if (!populated_slot) {
1394                                 bus_node->next = ctrl->bus_head;
1395                                 ctrl->bus_head = bus_node;
1396                         } else {
1397                                 bus_node->next = func->bus_head;
1398                                 func->bus_head = bus_node;
1399                         }
1400                 }
1401
1402                 i--;
1403                 one_slot += sizeof (struct slot_rt);
1404         }
1405
1406         // If all of the following fail, we don't have any resources for
1407         // hot plug add
1408         rc = 1;
1409         rc &= cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1410         rc &= cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1411         rc &= cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1412         rc &= cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1413
1414         return rc;
1415 }
1416
1417
1418 /*
1419  * cpqhp_return_board_resources
1420  *
1421  * this routine returns all resources allocated to a board to
1422  * the available pool.
1423  *
1424  * returns 0 if success
1425  */
1426 int cpqhp_return_board_resources(struct pci_func * func, struct resource_lists * resources)
1427 {
1428         int rc = 0;
1429         struct pci_resource *node;
1430         struct pci_resource *t_node;
1431         dbg("%s\n", __FUNCTION__);
1432
1433         if (!func)
1434                 return 1;
1435
1436         node = func->io_head;
1437         func->io_head = NULL;
1438         while (node) {
1439                 t_node = node->next;
1440                 return_resource(&(resources->io_head), node);
1441                 node = t_node;
1442         }
1443
1444         node = func->mem_head;
1445         func->mem_head = NULL;
1446         while (node) {
1447                 t_node = node->next;
1448                 return_resource(&(resources->mem_head), node);
1449                 node = t_node;
1450         }
1451
1452         node = func->p_mem_head;
1453         func->p_mem_head = NULL;
1454         while (node) {
1455                 t_node = node->next;
1456                 return_resource(&(resources->p_mem_head), node);
1457                 node = t_node;
1458         }
1459
1460         node = func->bus_head;
1461         func->bus_head = NULL;
1462         while (node) {
1463                 t_node = node->next;
1464                 return_resource(&(resources->bus_head), node);
1465                 node = t_node;
1466         }
1467
1468         rc |= cpqhp_resource_sort_and_combine(&(resources->mem_head));
1469         rc |= cpqhp_resource_sort_and_combine(&(resources->p_mem_head));
1470         rc |= cpqhp_resource_sort_and_combine(&(resources->io_head));
1471         rc |= cpqhp_resource_sort_and_combine(&(resources->bus_head));
1472
1473         return rc;
1474 }
1475
1476
1477 /*
1478  * cpqhp_destroy_resource_list
1479  *
1480  * Puts node back in the resource list pointed to by head
1481  */
1482 void cpqhp_destroy_resource_list (struct resource_lists * resources)
1483 {
1484         struct pci_resource *res, *tres;
1485
1486         res = resources->io_head;
1487         resources->io_head = NULL;
1488
1489         while (res) {
1490                 tres = res;
1491                 res = res->next;
1492                 kfree(tres);
1493         }
1494
1495         res = resources->mem_head;
1496         resources->mem_head = NULL;
1497
1498         while (res) {
1499                 tres = res;
1500                 res = res->next;
1501                 kfree(tres);
1502         }
1503
1504         res = resources->p_mem_head;
1505         resources->p_mem_head = NULL;
1506
1507         while (res) {
1508                 tres = res;
1509                 res = res->next;
1510                 kfree(tres);
1511         }
1512
1513         res = resources->bus_head;
1514         resources->bus_head = NULL;
1515
1516         while (res) {
1517                 tres = res;
1518                 res = res->next;
1519                 kfree(tres);
1520         }
1521 }
1522
1523
1524 /*
1525  * cpqhp_destroy_board_resources
1526  *
1527  * Puts node back in the resource list pointed to by head
1528  */
1529 void cpqhp_destroy_board_resources (struct pci_func * func)
1530 {
1531         struct pci_resource *res, *tres;
1532
1533         res = func->io_head;
1534         func->io_head = NULL;
1535
1536         while (res) {
1537                 tres = res;
1538                 res = res->next;
1539                 kfree(tres);
1540         }
1541
1542         res = func->mem_head;
1543         func->mem_head = NULL;
1544
1545         while (res) {
1546                 tres = res;
1547                 res = res->next;
1548                 kfree(tres);
1549         }
1550
1551         res = func->p_mem_head;
1552         func->p_mem_head = NULL;
1553
1554         while (res) {
1555                 tres = res;
1556                 res = res->next;
1557                 kfree(tres);
1558         }
1559
1560         res = func->bus_head;
1561         func->bus_head = NULL;
1562
1563         while (res) {
1564                 tres = res;
1565                 res = res->next;
1566                 kfree(tres);
1567         }
1568 }
1569