Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[linux-2.6] / arch / ia64 / sn / kernel / io_init.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) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
7  */
8
9 #include <linux/bootmem.h>
10 #include <linux/nodemask.h>
11 #include <asm/sn/types.h>
12 #include <asm/sn/addrs.h>
13 #include <asm/sn/geo.h>
14 #include <asm/sn/io.h>
15 #include <asm/sn/pcibr_provider.h>
16 #include <asm/sn/pcibus_provider_defs.h>
17 #include <asm/sn/pcidev.h>
18 #include <asm/sn/simulator.h>
19 #include <asm/sn/sn_sal.h>
20 #include <asm/sn/tioca_provider.h>
21 #include <asm/sn/tioce_provider.h>
22 #include "xtalk/hubdev.h"
23 #include "xtalk/xwidgetdev.h"
24
25 static struct list_head sn_sysdata_list;
26
27 /* sysdata list struct */
28 struct sysdata_el {
29         struct list_head entry;
30         void *sysdata;
31 };
32
33 struct slab_info {
34         struct hubdev_info hubdev;
35 };
36
37 struct brick {
38         moduleid_t id;          /* Module ID of this module        */
39         struct slab_info slab_info[MAX_SLABS + 1];
40 };
41
42 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
43
44 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
45
46 static int max_segment_number = 0; /* Default highest segment number */
47 static int max_pcibus_number = 255; /* Default highest pci bus number */
48
49 /*
50  * Hooks and struct for unsupported pci providers
51  */
52
53 static dma_addr_t
54 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
55 {
56         return 0;
57 }
58
59 static void
60 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
61 {
62         return;
63 }
64
65 static void *
66 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
67 {
68         return NULL;
69 }
70
71 static struct sn_pcibus_provider sn_pci_default_provider = {
72         .dma_map = sn_default_pci_map,
73         .dma_map_consistent = sn_default_pci_map,
74         .dma_unmap = sn_default_pci_unmap,
75         .bus_fixup = sn_default_pci_bus_fixup,
76 };
77
78 /*
79  * Retrieve the DMA Flush List given nasid, widget, and device.
80  * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
81  */
82 static inline u64
83 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
84                              u64 address)
85 {
86
87         struct ia64_sal_retval ret_stuff;
88         ret_stuff.status = 0;
89         ret_stuff.v0 = 0;
90
91         SAL_CALL_NOLOCK(ret_stuff,
92                         (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
93                         (u64) nasid, (u64) widget_num,
94                         (u64) device_num, (u64) address, 0, 0, 0);
95         return ret_stuff.status;
96
97 }
98
99 /*
100  * Retrieve the hub device info structure for the given nasid.
101  */
102 static inline u64 sal_get_hubdev_info(u64 handle, u64 address)
103 {
104
105         struct ia64_sal_retval ret_stuff;
106         ret_stuff.status = 0;
107         ret_stuff.v0 = 0;
108
109         SAL_CALL_NOLOCK(ret_stuff,
110                         (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
111                         (u64) handle, (u64) address, 0, 0, 0, 0, 0);
112         return ret_stuff.v0;
113 }
114
115 /*
116  * Retrieve the pci bus information given the bus number.
117  */
118 static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
119 {
120
121         struct ia64_sal_retval ret_stuff;
122         ret_stuff.status = 0;
123         ret_stuff.v0 = 0;
124
125         SAL_CALL_NOLOCK(ret_stuff,
126                         (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
127                         (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
128         return ret_stuff.v0;
129 }
130
131 /*
132  * Retrieve the pci device information given the bus and device|function number.
133  */
134 static inline u64
135 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
136                     u64 sn_irq_info)
137 {
138         struct ia64_sal_retval ret_stuff;
139         ret_stuff.status = 0;
140         ret_stuff.v0 = 0;
141
142         SAL_CALL_NOLOCK(ret_stuff,
143                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
144                         (u64) segment, (u64) bus_number, (u64) devfn,
145                         (u64) pci_dev,
146                         sn_irq_info, 0, 0);
147         return ret_stuff.v0;
148 }
149
150 /*
151  * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
152  *                        device.
153  */
154 inline struct pcidev_info *
155 sn_pcidev_info_get(struct pci_dev *dev)
156 {
157         struct pcidev_info *pcidev;
158
159         list_for_each_entry(pcidev,
160                             &(SN_PCI_CONTROLLER(dev)->pcidev_info), pdi_list) {
161                 if (pcidev->pdi_linux_pcidev == dev) {
162                         return pcidev;
163                 }
164         }
165         return NULL;
166 }
167
168 /*
169  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for 
170  *      each node in the system.
171  */
172 static void sn_fixup_ionodes(void)
173 {
174         struct sn_flush_device_kernel *sn_flush_device_kernel;
175         struct sn_flush_device_kernel *dev_entry;
176         struct hubdev_info *hubdev;
177         u64 status;
178         u64 nasid;
179         int i, widget, device;
180
181         /*
182          * Get SGI Specific HUB chipset information.
183          * Inform Prom that this kernel can support domain bus numbering.
184          */
185         for (i = 0; i < num_cnodes; i++) {
186                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
187                 nasid = cnodeid_to_nasid(i);
188                 hubdev->max_segment_number = 0xffffffff;
189                 hubdev->max_pcibus_number = 0xff;
190                 status = sal_get_hubdev_info(nasid, (u64) __pa(hubdev));
191                 if (status)
192                         continue;
193
194                 /* Save the largest Domain and pcibus numbers found. */
195                 if (hubdev->max_segment_number) {
196                         /*
197                          * Dealing with a Prom that supports segments.
198                          */
199                         max_segment_number = hubdev->max_segment_number;
200                         max_pcibus_number = hubdev->max_pcibus_number;
201                 }
202
203                 /* Attach the error interrupt handlers */
204                 if (nasid & 1)
205                         ice_error_init(hubdev);
206                 else
207                         hub_error_init(hubdev);
208
209                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
210                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
211
212                 if (!hubdev->hdi_flush_nasid_list.widget_p)
213                         continue;
214
215                 hubdev->hdi_flush_nasid_list.widget_p =
216                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
217                             sizeof(struct sn_flush_device_kernel *),
218                             GFP_KERNEL);
219                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
220                        (HUB_WIDGET_ID_MAX + 1) *
221                        sizeof(struct sn_flush_device_kernel *));
222
223                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
224                         sn_flush_device_kernel = kmalloc(DEV_PER_WIDGET *
225                                                          sizeof(struct
226                                                         sn_flush_device_kernel),
227                                                         GFP_KERNEL);
228                         if (!sn_flush_device_kernel)
229                                 BUG();
230                         memset(sn_flush_device_kernel, 0x0,
231                                DEV_PER_WIDGET *
232                                sizeof(struct sn_flush_device_kernel));
233
234                         dev_entry = sn_flush_device_kernel;
235                         for (device = 0; device < DEV_PER_WIDGET;
236                              device++,dev_entry++) {
237                                 dev_entry->common = kmalloc(sizeof(struct
238                                                         sn_flush_device_common),
239                                                             GFP_KERNEL);
240                                 if (!dev_entry->common)
241                                         BUG();
242                                 memset(dev_entry->common, 0x0, sizeof(struct
243                                                        sn_flush_device_common));
244
245                                 status = sal_get_device_dmaflush_list(nasid,
246                                                                         widget,
247                                                                         device,
248                                                       (u64)(dev_entry->common));
249                                 if (status)
250                                         BUG();
251
252                                 spin_lock_init(&dev_entry->sfdl_flush_lock);
253                         }
254
255                         if (sn_flush_device_kernel)
256                                 hubdev->hdi_flush_nasid_list.widget_p[widget] =
257                                                        sn_flush_device_kernel;
258                 }
259         }
260 }
261
262 /*
263  * sn_pci_window_fixup() - Create a pci_window for each device resource.
264  *                         Until ACPI support is added, we need this code
265  *                         to setup pci_windows for use by
266  *                         pcibios_bus_to_resource(),
267  *                         pcibios_resource_to_bus(), etc.
268  */
269 static void
270 sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
271                     s64 * pci_addrs)
272 {
273         struct pci_controller *controller = PCI_CONTROLLER(dev->bus);
274         unsigned int i;
275         unsigned int idx;
276         unsigned int new_count;
277         struct pci_window *new_window;
278
279         if (count == 0)
280                 return;
281         idx = controller->windows;
282         new_count = controller->windows + count;
283         new_window = kcalloc(new_count, sizeof(struct pci_window), GFP_KERNEL);
284         if (new_window == NULL)
285                 BUG();
286         if (controller->window) {
287                 memcpy(new_window, controller->window,
288                        sizeof(struct pci_window) * controller->windows);
289                 kfree(controller->window);
290         }
291
292         /* Setup a pci_window for each device resource. */
293         for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
294                 if (pci_addrs[i] == -1)
295                         continue;
296
297                 new_window[idx].offset = dev->resource[i].start - pci_addrs[i];
298                 new_window[idx].resource = dev->resource[i];
299                 idx++;
300         }
301
302         controller->windows = new_count;
303         controller->window = new_window;
304 }
305
306 void sn_pci_unfixup_slot(struct pci_dev *dev)
307 {
308         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
309
310         sn_irq_unfixup(dev);
311         pci_dev_put(host_pci_dev);
312         pci_dev_put(dev);
313 }
314
315 /*
316  * sn_pci_fixup_slot() - This routine sets up a slot's resources
317  * consistent with the Linux PCI abstraction layer.  Resources acquired
318  * from our PCI provider include PIO maps to BAR space and interrupt
319  * objects.
320  */
321 void sn_pci_fixup_slot(struct pci_dev *dev)
322 {
323         unsigned int count = 0;
324         int idx;
325         int segment = pci_domain_nr(dev->bus);
326         int status = 0;
327         struct pcibus_bussoft *bs;
328         struct pci_bus *host_pci_bus;
329         struct pci_dev *host_pci_dev;
330         struct pcidev_info *pcidev_info;
331         s64 pci_addrs[PCI_ROM_RESOURCE + 1];
332         struct sn_irq_info *sn_irq_info;
333         unsigned long size;
334         unsigned int bus_no, devfn;
335
336         pci_dev_get(dev); /* for the sysdata pointer */
337         pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
338         if (pcidev_info <= 0)
339                 BUG();          /* Cannot afford to run out of memory */
340
341         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
342         if (sn_irq_info <= 0)
343                 BUG();          /* Cannot afford to run out of memory */
344         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
345
346         /* Call to retrieve pci device information needed by kernel. */
347         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number, 
348                                      dev->devfn,
349                                      (u64) __pa(pcidev_info),
350                                      (u64) __pa(sn_irq_info));
351         if (status)
352                 BUG(); /* Cannot get platform pci device information */
353
354         /* Add pcidev_info to list in sn_pci_controller struct */
355         list_add_tail(&pcidev_info->pdi_list,
356                       &(SN_PCI_CONTROLLER(dev->bus)->pcidev_info));
357
358         /* Copy over PIO Mapped Addresses */
359         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
360                 unsigned long start, end, addr;
361
362                 if (!pcidev_info->pdi_pio_mapped_addr[idx]) {
363                         pci_addrs[idx] = -1;
364                         continue;
365                 }
366
367                 start = dev->resource[idx].start;
368                 end = dev->resource[idx].end;
369                 size = end - start;
370                 if (size == 0) {
371                         pci_addrs[idx] = -1;
372                         continue;
373                 }
374                 pci_addrs[idx] = start;
375                 count++;
376                 addr = pcidev_info->pdi_pio_mapped_addr[idx];
377                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
378                 dev->resource[idx].start = addr;
379                 dev->resource[idx].end = addr + size;
380                 if (dev->resource[idx].flags & IORESOURCE_IO)
381                         dev->resource[idx].parent = &ioport_resource;
382                 else
383                         dev->resource[idx].parent = &iomem_resource;
384         }
385         /* Create a pci_window in the pci_controller struct for
386          * each device resource.
387          */
388         if (count > 0)
389                 sn_pci_window_fixup(dev, count, pci_addrs);
390
391         /*
392          * Using the PROMs values for the PCI host bus, get the Linux
393          * PCI host_pci_dev struct and set up host bus linkages
394          */
395
396         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
397         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
398         host_pci_bus = pci_find_bus(segment, bus_no);
399         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
400
401         pcidev_info->host_pci_dev = host_pci_dev;
402         pcidev_info->pdi_linux_pcidev = dev;
403         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
404         bs = SN_PCIBUS_BUSSOFT(dev->bus);
405         pcidev_info->pdi_pcibus_info = bs;
406
407         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
408                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
409         } else {
410                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
411         }
412
413         /* Only set up IRQ stuff if this device has a host bus context */
414         if (bs && sn_irq_info->irq_irq) {
415                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
416                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
417                 sn_irq_fixup(dev, sn_irq_info);
418         } else {
419                 pcidev_info->pdi_sn_irq_info = NULL;
420                 kfree(sn_irq_info);
421         }
422 }
423
424 /*
425  * sn_pci_controller_fixup() - This routine sets up a bus's resources
426  * consistent with the Linux PCI abstraction layer.
427  */
428 void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
429 {
430         int status = 0;
431         int nasid, cnode;
432         struct pci_controller *controller;
433         struct sn_pci_controller *sn_controller;
434         struct pcibus_bussoft *prom_bussoft_ptr;
435         struct hubdev_info *hubdev_info;
436         void *provider_soft = NULL;
437         struct sn_pcibus_provider *provider;
438
439         status = sal_get_pcibus_info((u64) segment, (u64) busnum,
440                                      (u64) ia64_tpa(&prom_bussoft_ptr));
441         if (status > 0)
442                 return;         /*bus # does not exist */
443         prom_bussoft_ptr = __va(prom_bussoft_ptr);
444
445         /* Allocate a sn_pci_controller, which has a pci_controller struct
446          * as the first member.
447          */
448         sn_controller = kzalloc(sizeof(struct sn_pci_controller), GFP_KERNEL);
449         if (!sn_controller)
450                 BUG();
451         INIT_LIST_HEAD(&sn_controller->pcidev_info);
452         controller = &sn_controller->pci_controller;
453         controller->segment = segment;
454
455         if (bus == NULL) {
456                 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
457                 if (bus == NULL)
458                         goto error_return; /* error, or bus already scanned */
459                 bus->sysdata = NULL;
460         }
461
462         if (bus->sysdata)
463                 goto error_return; /* sysdata already alloc'd */
464
465         /*
466          * Per-provider fixup.  Copies the contents from prom to local
467          * area and links SN_PCIBUS_BUSSOFT().
468          */
469
470         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
471                 goto error_return; /* unsupported asic type */
472
473         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
474                 goto error_return; /* no further fixup necessary */
475
476         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
477         if (provider == NULL)
478                 goto error_return; /* no provider registerd for this asic */
479
480         bus->sysdata = controller;
481         if (provider->bus_fixup)
482                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
483
484         if (provider_soft == NULL) {
485                 /* fixup failed or not applicable */
486                 bus->sysdata = NULL;
487                 goto error_return;
488         }
489
490         /*
491          * Setup pci_windows for legacy IO and MEM space.
492          * (Temporary until ACPI support is in place.)
493          */
494         controller->window = kcalloc(2, sizeof(struct pci_window), GFP_KERNEL);
495         if (controller->window == NULL)
496                 BUG();
497         controller->window[0].offset = prom_bussoft_ptr->bs_legacy_io;
498         controller->window[0].resource.name = "legacy_io";
499         controller->window[0].resource.flags = IORESOURCE_IO;
500         controller->window[0].resource.start = prom_bussoft_ptr->bs_legacy_io;
501         controller->window[0].resource.end =
502             controller->window[0].resource.start + 0xffff;
503         controller->window[0].resource.parent = &ioport_resource;
504         controller->window[1].offset = prom_bussoft_ptr->bs_legacy_mem;
505         controller->window[1].resource.name = "legacy_mem";
506         controller->window[1].resource.flags = IORESOURCE_MEM;
507         controller->window[1].resource.start = prom_bussoft_ptr->bs_legacy_mem;
508         controller->window[1].resource.end =
509             controller->window[1].resource.start + (1024 * 1024) - 1;
510         controller->window[1].resource.parent = &iomem_resource;
511         controller->windows = 2;
512
513         /*
514          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
515          * after this point.
516          */
517
518         PCI_CONTROLLER(bus)->platform_data = provider_soft;
519         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
520         cnode = nasid_to_cnodeid(nasid);
521         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
522         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
523             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
524
525         /*
526          * If the node information we obtained during the fixup phase is invalid
527          * then set controller->node to -1 (undetermined)
528          */
529         if (controller->node >= num_online_nodes()) {
530                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
531
532                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
533                                     "L_IO=%lx L_MEM=%lx BASE=%lx\n",
534                         b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
535                         b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
536                 printk(KERN_WARNING "on node %d but only %d nodes online."
537                         "Association set to undetermined.\n",
538                         controller->node, num_online_nodes());
539                 controller->node = -1;
540         }
541         return;
542
543 error_return:
544
545         kfree(sn_controller);
546         return;
547 }
548
549 void sn_bus_store_sysdata(struct pci_dev *dev)
550 {
551         struct sysdata_el *element;
552
553         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
554         if (!element) {
555                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
556                 return;
557         }
558         element->sysdata = SN_PCIDEV_INFO(dev);
559         list_add(&element->entry, &sn_sysdata_list);
560 }
561
562 void sn_bus_free_sysdata(void)
563 {
564         struct sysdata_el *element;
565         struct list_head *list;
566
567 sn_sysdata_free_start:
568         list_for_each(list, &sn_sysdata_list) {
569                 element = list_entry(list, struct sysdata_el, entry);
570                 list_del(&element->entry);
571                 kfree(element->sysdata);
572                 kfree(element);
573                 goto sn_sysdata_free_start;
574         }
575         return;
576 }
577
578 /*
579  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
580  */
581
582 #define PCI_BUSES_TO_SCAN 256
583
584 static int __init sn_pci_init(void)
585 {
586         int i = 0;
587         int j = 0;
588         struct pci_dev *pci_dev = NULL;
589         extern void sn_init_cpei_timer(void);
590 #ifdef CONFIG_PROC_FS
591         extern void register_sn_procfs(void);
592 #endif
593
594         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
595                 return 0;
596
597         /*
598          * prime sn_pci_provider[].  Individial provider init routines will
599          * override their respective default entries.
600          */
601
602         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
603                 sn_pci_provider[i] = &sn_pci_default_provider;
604
605         pcibr_init_provider();
606         tioca_init_provider();
607         tioce_init_provider();
608
609         /*
610          * This is needed to avoid bounce limit checks in the blk layer
611          */
612         ia64_max_iommu_merge_mask = ~PAGE_MASK;
613         sn_fixup_ionodes();
614         sn_irq_lh_init();
615         INIT_LIST_HEAD(&sn_sysdata_list);
616         sn_init_cpei_timer();
617
618 #ifdef CONFIG_PROC_FS
619         register_sn_procfs();
620 #endif
621
622         /* busses are not known yet ... */
623         for (i = 0; i <= max_segment_number; i++)
624                 for (j = 0; j <= max_pcibus_number; j++)
625                         sn_pci_controller_fixup(i, j, NULL);
626
627         /*
628          * Generic Linux PCI Layer has created the pci_bus and pci_dev 
629          * structures - time for us to add our SN PLatform specific 
630          * information.
631          */
632
633         while ((pci_dev =
634                 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
635                 sn_pci_fixup_slot(pci_dev);
636
637         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
638
639         return 0;
640 }
641
642 /*
643  * hubdev_init_node() - Creates the HUB data structure and link them to it's 
644  *      own NODE specific data area.
645  */
646 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
647 {
648
649         struct hubdev_info *hubdev_info;
650
651         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
652                 hubdev_info =
653                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
654                                                              sizeof(struct
655                                                                     hubdev_info));
656         else
657                 hubdev_info =
658                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
659                                                              sizeof(struct
660                                                                     hubdev_info));
661         npda->pdinfo = (void *)hubdev_info;
662
663 }
664
665 geoid_t
666 cnodeid_get_geoid(cnodeid_t cnode)
667 {
668
669         struct hubdev_info *hubdev;
670
671         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
672         return hubdev->hdi_geoid;
673
674 }
675
676 subsys_initcall(sn_pci_init);
677 EXPORT_SYMBOL(sn_pci_fixup_slot);
678 EXPORT_SYMBOL(sn_pci_unfixup_slot);
679 EXPORT_SYMBOL(sn_pci_controller_fixup);
680 EXPORT_SYMBOL(sn_bus_store_sysdata);
681 EXPORT_SYMBOL(sn_bus_free_sysdata);