arch/ia64/sn/kernel/io_common.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/bootmem.h>
  10 #include <asm/sn/types.h>
  11 #include <asm/sn/addrs.h>
  12 #include <asm/sn/sn_feature_sets.h>
  13 #include <asm/sn/geo.h>
  14 #include <asm/sn/io.h>
  15 #include <asm/sn/l1.h>
  16 #include <asm/sn/module.h>
  17 #include <asm/sn/pcibr_provider.h>
  18 #include <asm/sn/pcibus_provider_defs.h>
  19 #include <asm/sn/pcidev.h>
  20 #include <asm/sn/simulator.h>
  21 #include <asm/sn/sn_sal.h>
  22 #include <asm/sn/tioca_provider.h>
  23 #include <asm/sn/tioce_provider.h>
  24 #include "xtalk/hubdev.h"
  25 #include "xtalk/xwidgetdev.h"
  26 #include <linux/acpi.h>
  27 #include <asm/sn/sn2/sn_hwperf.h>
  28 #include <asm/sn/acpi.h>
  29
  30 extern void sn_init_cpei_timer(void);
  31 extern void register_sn_procfs(void);
  32 extern void sn_acpi_bus_fixup(struct pci_bus *);
  33 extern void sn_bus_fixup(struct pci_bus *);
  34 extern void sn_acpi_slot_fixup(struct pci_dev *, struct pcidev_info *);
  35 extern void sn_more_slot_fixup(struct pci_dev *, struct pcidev_info *);
  36 extern void sn_legacy_pci_window_fixup(struct pci_controller *, u64, u64);
  37 extern void sn_io_acpi_init(void);
  38 extern void sn_io_init(void);
  39
  40
  41 static struct list_head sn_sysdata_list;
  42
  43 /* sysdata list struct */
  44 struct sysdata_el {
  45         struct list_head entry;
  46         void *sysdata;
  47 };
  48
  49 int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
  50
  51 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  52
  53 int sn_acpi_base_support(void)
  54 {
  55         struct acpi_table_header *header;
  56         (void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
  57         if (header && header->oem_revision >= 0x20101)
  58                 return 1;
  59         return 0;
  60 }
  61
  62 /*
  63  * Hooks and struct for unsupported pci providers
  64  */
  65
  66 static dma_addr_t
  67 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
  68 {
  69         return 0;
  70 }
  71
  72 static void
  73 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  74 {
  75         return;
  76 }
  77
  78 static void *
  79 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
  80 {
  81         return NULL;
  82 }
  83
  84 static struct sn_pcibus_provider sn_pci_default_provider = {
  85         .dma_map = sn_default_pci_map,
  86         .dma_map_consistent = sn_default_pci_map,
  87         .dma_unmap = sn_default_pci_unmap,
  88         .bus_fixup = sn_default_pci_bus_fixup,
  89 };
  90
  91 /*
  92  * Retrieve the DMA Flush List given nasid, widget, and device.
  93  * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
  94  */
  95 static inline u64
  96 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
  97                              u64 address)
  98 {
  99         struct ia64_sal_retval ret_stuff;
 100         ret_stuff.status = 0;
 101         ret_stuff.v0 = 0;
 102
 103         SAL_CALL_NOLOCK(ret_stuff,
 104                         (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
 105                         (u64) nasid, (u64) widget_num,
 106                         (u64) device_num, (u64) address, 0, 0, 0);
 107         return ret_stuff.status;
 108 }
 109
 110 /*
 111  * Retrieve the pci device information given the bus and device|function number.
 112  */
 113 static inline u64
 114 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
 115                     u64 sn_irq_info)
 116 {
 117         struct ia64_sal_retval ret_stuff;
 118         ret_stuff.status = 0;
 119         ret_stuff.v0 = 0;
 120
 121         SAL_CALL_NOLOCK(ret_stuff,
 122                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
 123                         (u64) segment, (u64) bus_number, (u64) devfn,
 124                         (u64) pci_dev,
 125                         sn_irq_info, 0, 0);
 126         return ret_stuff.v0;
 127 }
 128
 129 /*
 130  * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
 131  *                        device.
 132  */
 133 inline struct pcidev_info *
 134 sn_pcidev_info_get(struct pci_dev *dev)
 135 {
 136         struct pcidev_info *pcidev;
 137
 138         list_for_each_entry(pcidev,
 139                             &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
 140                 if (pcidev->pdi_linux_pcidev == dev)
 141                         return pcidev;
 142         }
 143         return NULL;
 144 }
 145
 146 /* Older PROM flush WAR
 147  *
 148  * 01/16/06 -- This war will be in place until a new official PROM is released.
 149  * Additionally note that the struct sn_flush_device_war also has to be
 150  * removed from arch/ia64/sn/include/xtalk/hubdev.h
 151  */
 152 static u8 war_implemented = 0;
 153
 154 static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
 155                                struct sn_flush_device_common *common)
 156 {
 157         struct sn_flush_device_war *war_list;
 158         struct sn_flush_device_war *dev_entry;
 159         struct ia64_sal_retval isrv = {0,0,0,0};
 160
 161         if (!war_implemented) {
 162                 printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
 163                        "PROM flush WAR\n");
 164                 war_implemented = 1;
 165         }
 166
 167         war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
 168         if (!war_list)
 169                 BUG();
 170
 171         SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
 172                         nasid, widget, __pa(war_list), 0, 0, 0 ,0);
 173         if (isrv.status)
 174                 panic("sn_device_fixup_war failed: %s\n",
 175                       ia64_sal_strerror(isrv.status));
 176
 177         dev_entry = war_list + device;
 178         memcpy(common,dev_entry, sizeof(*common));
 179         kfree(war_list);
 180
 181         return isrv.status;
 182 }
 183
 184 /*
 185  * sn_common_hubdev_init() - This routine is called to initialize the HUB data
 186  *                           structure for each node in the system.
 187  */
 188 void __init
 189 sn_common_hubdev_init(struct hubdev_info *hubdev)
 190 {
 191
 192         struct sn_flush_device_kernel *sn_flush_device_kernel;
 193         struct sn_flush_device_kernel *dev_entry;
 194         s64 status;
 195         int widget, device, size;
 196
 197         /* Attach the error interrupt handlers */
 198         if (hubdev->hdi_nasid & 1)      /* If TIO */
 199                 ice_error_init(hubdev);
 200         else
 201                 hub_error_init(hubdev);
 202
 203         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 204                 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 205
 206         if (!hubdev->hdi_flush_nasid_list.widget_p)
 207                 return;
 208
 209         size = (HUB_WIDGET_ID_MAX + 1) *
 210                 sizeof(struct sn_flush_device_kernel *);
 211         hubdev->hdi_flush_nasid_list.widget_p =
 212                 kzalloc(size, GFP_KERNEL);
 213         if (!hubdev->hdi_flush_nasid_list.widget_p)
 214                 BUG();
 215
 216         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 217                 size = DEV_PER_WIDGET *
 218                         sizeof(struct sn_flush_device_kernel);
 219                 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
 220                 if (!sn_flush_device_kernel)
 221                         BUG();
 222
 223                 dev_entry = sn_flush_device_kernel;
 224                 for (device = 0; device < DEV_PER_WIDGET;
 225                      device++, dev_entry++) {
 226                         size = sizeof(struct sn_flush_device_common);
 227                         dev_entry->common = kzalloc(size, GFP_KERNEL);
 228                         if (!dev_entry->common)
 229                                 BUG();
 230                         if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
 231                                 status = sal_get_device_dmaflush_list(
 232                                              hubdev->hdi_nasid, widget, device,
 233                                              (u64)(dev_entry->common));
 234                         else
 235                                 status = sn_device_fixup_war(hubdev->hdi_nasid,
 236                                                              widget, device,
 237                                                              dev_entry->common);
 238                         if (status != SALRET_OK)
 239                                 panic("SAL call failed: %s\n",
 240                                       ia64_sal_strerror(status));
 241
 242                         spin_lock_init(&dev_entry->sfdl_flush_lock);
 243                 }
 244
 245                 if (sn_flush_device_kernel)
 246                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 247                                                          sn_flush_device_kernel;
 248         }
 249 }
 250
 251 void sn_pci_unfixup_slot(struct pci_dev *dev)
 252 {
 253         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 254
 255         sn_irq_unfixup(dev);
 256         pci_dev_put(host_pci_dev);
 257         pci_dev_put(dev);
 258 }
 259
 260 /*
 261  * sn_pci_fixup_slot() - This routine sets up a slot's resources consistent
 262  *                       with the Linux PCI abstraction layer. Resources
 263  *                       acquired from our PCI provider include PIO maps
 264  *                       to BAR space and interrupt objects.
 265  */
 266 void sn_pci_fixup_slot(struct pci_dev *dev)
 267 {
 268         int segment = pci_domain_nr(dev->bus);
 269         int status = 0;
 270         struct pcibus_bussoft *bs;
 271         struct pci_bus *host_pci_bus;
 272         struct pci_dev *host_pci_dev;
 273         struct pcidev_info *pcidev_info;
 274         struct sn_irq_info *sn_irq_info;
 275         unsigned int bus_no, devfn;
 276
 277         pci_dev_get(dev); /* for the sysdata pointer */
 278         pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 279         if (!pcidev_info)
 280                 BUG();          /* Cannot afford to run out of memory */
 281
 282         sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 283         if (!sn_irq_info)
 284                 BUG();          /* Cannot afford to run out of memory */
 285
 286         /* Call to retrieve pci device information needed by kernel. */
 287         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 288                                      dev->devfn,
 289                                      (u64) __pa(pcidev_info),
 290                                      (u64) __pa(sn_irq_info));
 291         if (status)
 292                 BUG(); /* Cannot get platform pci device information */
 293
 294         /* Add pcidev_info to list in pci_controller.platform_data */
 295         list_add_tail(&pcidev_info->pdi_list,
 296                       &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
 297
 298         if (SN_ACPI_BASE_SUPPORT())
 299                 sn_acpi_slot_fixup(dev, pcidev_info);
 300         else
 301                 sn_more_slot_fixup(dev, pcidev_info);
 302         /*
 303          * Using the PROMs values for the PCI host bus, get the Linux
 304          * PCI host_pci_dev struct and set up host bus linkages
 305          */
 306
 307         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
 308         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
 309         host_pci_bus = pci_find_bus(segment, bus_no);
 310         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 311
 312         pcidev_info->host_pci_dev = host_pci_dev;
 313         pcidev_info->pdi_linux_pcidev = dev;
 314         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
 315         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 316         pcidev_info->pdi_pcibus_info = bs;
 317
 318         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 319                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 320         } else {
 321                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 322         }
 323
 324         /* Only set up IRQ stuff if this device has a host bus context */
 325         if (bs && sn_irq_info->irq_irq) {
 326                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
 327                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
 328                 sn_irq_fixup(dev, sn_irq_info);
 329         } else {
 330                 pcidev_info->pdi_sn_irq_info = NULL;
 331                 kfree(sn_irq_info);
 332         }
 333 }
 334
 335 /*
 336  * sn_common_bus_fixup - Perform platform specific bus fixup.
 337  *                       Execute the ASIC specific fixup routine
 338  *                       for this bus.
 339  */
 340 void
 341 sn_common_bus_fixup(struct pci_bus *bus,
 342                     struct pcibus_bussoft *prom_bussoft_ptr)
 343 {
 344         int cnode;
 345         struct pci_controller *controller;
 346         struct hubdev_info *hubdev_info;
 347         int nasid;
 348         void *provider_soft;
 349         struct sn_pcibus_provider *provider;
 350         struct sn_platform_data *sn_platform_data;
 351
 352         controller = PCI_CONTROLLER(bus);
 353         /*
 354          * Per-provider fixup.  Copies the bus soft structure from prom
 355          * to local area and links SN_PCIBUS_BUSSOFT().
 356          */
 357
 358         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 359                 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
 360                        prom_bussoft_ptr->bs_asic_type);
 361                 return;
 362         }
 363
 364         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 365                 return; /* no further fixup necessary */
 366
 367         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 368         if (provider == NULL)
 369                 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
 370                       prom_bussoft_ptr->bs_asic_type);
 371
 372         if (provider->bus_fixup)
 373                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
 374                                  controller);
 375         else
 376                 provider_soft = NULL;
 377
 378         /*
 379          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 380          * after this point.
 381          */
 382         controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
 383                                             GFP_KERNEL);
 384         if (controller->platform_data == NULL)
 385                 BUG();
 386         sn_platform_data =
 387                         (struct sn_platform_data *) controller->platform_data;
 388         sn_platform_data->provider_soft = provider_soft;
 389         INIT_LIST_HEAD(&((struct sn_platform_data *)
 390                          controller->platform_data)->pcidev_info);
 391         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 392         cnode = nasid_to_cnodeid(nasid);
 393         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 394         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 395             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 396
 397         /*
 398          * If the node information we obtained during the fixup phase is
 399          * invalid then set controller->node to -1 (undetermined)
 400          */
 401         if (controller->node >= num_online_nodes()) {
 402                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 403
 404                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
 405                        "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 406                        b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 407                        b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 408                 printk(KERN_WARNING "on node %d but only %d nodes online."
 409                        "Association set to undetermined.\n",
 410                        controller->node, num_online_nodes());
 411                 controller->node = -1;
 412         }
 413 }
 414
 415 void sn_bus_store_sysdata(struct pci_dev *dev)
 416 {
 417         struct sysdata_el *element;
 418
 419         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
 420         if (!element) {
 421                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
 422                 return;
 423         }
 424         element->sysdata = SN_PCIDEV_INFO(dev);
 425         list_add(&element->entry, &sn_sysdata_list);
 426 }
 427
 428 void sn_bus_free_sysdata(void)
 429 {
 430         struct sysdata_el *element;
 431         struct list_head *list, *safe;
 432
 433         list_for_each_safe(list, safe, &sn_sysdata_list) {
 434                 element = list_entry(list, struct sysdata_el, entry);
 435                 list_del(&element->entry);
 436                 list_del(&(((struct pcidev_info *)
 437                              (element->sysdata))->pdi_list));
 438                 kfree(element->sysdata);
 439                 kfree(element);
 440         }
 441         return;
 442 }
 443
 444 /*
 445  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 446  *                      own NODE specific data area.
 447  */
 448 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 449 {
 450         struct hubdev_info *hubdev_info;
 451         int size;
 452         pg_data_t *pg;
 453
 454         size = sizeof(struct hubdev_info);
 455
 456         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 457                 pg = NODE_DATA(0);
 458         else
 459                 pg = NODE_DATA(node);
 460
 461         hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
 462
 463         npda->pdinfo = (void *)hubdev_info;
 464 }
 465
 466 geoid_t
 467 cnodeid_get_geoid(cnodeid_t cnode)
 468 {
 469         struct hubdev_info *hubdev;
 470
 471         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 472         return hubdev->hdi_geoid;
 473 }
 474
 475 void sn_generate_path(struct pci_bus *pci_bus, char *address)
 476 {
 477         nasid_t nasid;
 478         cnodeid_t cnode;
 479         geoid_t geoid;
 480         moduleid_t moduleid;
 481         u16 bricktype;
 482
 483         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 484         cnode = nasid_to_cnodeid(nasid);
 485         geoid = cnodeid_get_geoid(cnode);
 486         moduleid = geo_module(geoid);
 487
 488         sprintf(address, "module_%c%c%c%c%.2d",
 489                 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
 490                 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
 491                 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
 492                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
 493
 494         /* Tollhouse requires slot id to be displayed */
 495         bricktype = MODULE_GET_BTYPE(moduleid);
 496         if ((bricktype == L1_BRICKTYPE_191010) ||
 497             (bricktype == L1_BRICKTYPE_1932))
 498                         sprintf(address, "%s^%d", address, geo_slot(geoid));
 499 }
 500
 501 /*
 502  * sn_pci_fixup_bus() - Perform SN specific setup of software structs
 503  *                      (pcibus_bussoft, pcidev_info) and hardware
 504  *                      registers, for the specified bus and devices under it.
 505  */
 506 void __devinit
 507 sn_pci_fixup_bus(struct pci_bus *bus)
 508 {
 509
 510         if (SN_ACPI_BASE_SUPPORT())
 511                 sn_acpi_bus_fixup(bus);
 512         else
 513                 sn_bus_fixup(bus);
 514 }
 515
 516 /*
 517  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 518  *                    In particular, setup the sn_pci_provider[] array.
 519  *                    This needs to be done prior to any bus scanning
 520  *                    (acpi_scan_init()) in the ACPI case, as the SN
 521  *                    bus fixup code will reference the array.
 522  */
 523 static int __init
 524 sn_io_early_init(void)
 525 {
 526         int i;
 527
 528         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 529                 return 0;
 530
 531         /*
 532          * prime sn_pci_provider[].  Individial provider init routines will
 533          * override their respective default entries.
 534          */
 535
 536         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 537                 sn_pci_provider[i] = &sn_pci_default_provider;
 538
 539         pcibr_init_provider();
 540         tioca_init_provider();
 541         tioce_init_provider();
 542
 543         /*
 544          * This is needed to avoid bounce limit checks in the blk layer
 545          */
 546         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 547
 548         sn_irq_lh_init();
 549         INIT_LIST_HEAD(&sn_sysdata_list);
 550         sn_init_cpei_timer();
 551
 552 #ifdef CONFIG_PROC_FS
 553         register_sn_procfs();
 554 #endif
 555
 556         {
 557                 struct acpi_table_header *header;
 558                 (void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
 559                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 560                         header->oem_revision);
 561         }
 562         if (SN_ACPI_BASE_SUPPORT())
 563                 sn_io_acpi_init();
 564         else
 565                 sn_io_init();
 566         return 0;
 567 }
 568
 569 arch_initcall(sn_io_early_init);
 570
 571 /*
 572  * sn_io_late_init() - Perform any final platform specific IO initialization.
 573  */
 574
 575 int __init
 576 sn_io_late_init(void)
 577 {
 578         struct pci_bus *bus;
 579         struct pcibus_bussoft *bussoft;
 580         cnodeid_t cnode;
 581         nasid_t nasid;
 582         cnodeid_t near_cnode;
 583
 584         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 585                 return 0;
 586
 587         /*
 588          * Setup closest node in pci_controller->node for
 589          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
 590          * info from the PROM).
 591          */
 592         bus = NULL;
 593         while ((bus = pci_find_next_bus(bus)) != NULL) {
 594                 bussoft = SN_PCIBUS_BUSSOFT(bus);
 595                 nasid = NASID_GET(bussoft->bs_base);
 596                 cnode = nasid_to_cnodeid(nasid);
 597                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
 598                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE)) {
 599                         /* TIO PCI Bridge: find nearest node with CPUs */
 600                         int e = sn_hwperf_get_nearest_node(cnode, NULL,
 601                                                            &near_cnode);
 602                         if (e < 0) {
 603                                 near_cnode = (cnodeid_t)-1; /* use any node */
 604                                 printk(KERN_WARNING "pcibr_bus_fixup: failed "
 605                                        "to find near node with CPUs to TIO "
 606                                        "node %d, err=%d\n", cnode, e);
 607                         }
 608                         PCI_CONTROLLER(bus)->node = near_cnode;
 609                 } else if (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC) {
 610                         PCI_CONTROLLER(bus)->node = cnode;
 611                 }
 612         }
 613
 614         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
 615
 616         return 0;
 617 }
 618
 619 fs_initcall(sn_io_late_init);
 620
 621 EXPORT_SYMBOL(sn_pci_fixup_slot);
 622 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 623 EXPORT_SYMBOL(sn_bus_store_sysdata);
 624 EXPORT_SYMBOL(sn_bus_free_sysdata);
 625 EXPORT_SYMBOL(sn_generate_path);
 626