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