git.oblomov.eu Git - linux-2.6/blob - 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, 2000-2004 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 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
  26
  27 static struct list_head sn_sysdata_list;
  28
  29 /* sysdata list struct */
  30 struct sysdata_el {
  31         struct list_head entry;
  32         void *sysdata;
  33 };
  34
  35 struct slab_info {
  36         struct hubdev_info hubdev;
  37 };
  38
  39 struct brick {
  40         moduleid_t id;          /* Module ID of this module        */
  41         struct slab_info slab_info[MAX_SLABS + 1];
  42 };
  43
  44 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
  45
  46 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  47
  48 static int max_segment_number = 0; /* Default highest segment number */
  49 static int max_pcibus_number = 255; /* Default highest pci bus number */
  50
  51 /*
  52  * Hooks and struct for unsupported pci providers
  53  */
  54
  55 static dma_addr_t
  56 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
  57 {
  58         return 0;
  59 }
  60
  61 static void
  62 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  63 {
  64         return;
  65 }
  66
  67 static void *
  68 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
  69 {
  70         return NULL;
  71 }
  72
  73 static struct sn_pcibus_provider sn_pci_default_provider = {
  74         .dma_map = sn_default_pci_map,
  75         .dma_map_consistent = sn_default_pci_map,
  76         .dma_unmap = sn_default_pci_unmap,
  77         .bus_fixup = sn_default_pci_bus_fixup,
  78 };
  79
  80 /*
  81  * Retrieve the DMA Flush List given nasid.  This list is needed
  82  * to implement the WAR - Flush DMA data on PIO Reads.
  83  */
  84 static inline uint64_t
  85 sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, u64 address)
  86 {
  87
  88         struct ia64_sal_retval ret_stuff;
  89         ret_stuff.status = 0;
  90         ret_stuff.v0 = 0;
  91
  92         SAL_CALL_NOLOCK(ret_stuff,
  93                         (u64) SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
  94                         (u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
  95                         0);
  96         return ret_stuff.v0;
  97
  98 }
  99
 100 /*
 101  * Retrieve the hub device info structure for the given nasid.
 102  */
 103 static inline uint64_t sal_get_hubdev_info(u64 handle, u64 address)
 104 {
 105
 106         struct ia64_sal_retval ret_stuff;
 107         ret_stuff.status = 0;
 108         ret_stuff.v0 = 0;
 109
 110         SAL_CALL_NOLOCK(ret_stuff,
 111                         (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
 112                         (u64) handle, (u64) address, 0, 0, 0, 0, 0);
 113         return ret_stuff.v0;
 114 }
 115
 116 /*
 117  * Retrieve the pci bus information given the bus number.
 118  */
 119 static inline uint64_t sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
 120 {
 121
 122         struct ia64_sal_retval ret_stuff;
 123         ret_stuff.status = 0;
 124         ret_stuff.v0 = 0;
 125
 126         SAL_CALL_NOLOCK(ret_stuff,
 127                         (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
 128                         (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
 129         return ret_stuff.v0;
 130 }
 131
 132 /*
 133  * Retrieve the pci device information given the bus and device|function number.
 134  */
 135 static inline uint64_t
 136 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
 137                         u64 sn_irq_info)
 138 {
 139         struct ia64_sal_retval ret_stuff;
 140         ret_stuff.status = 0;
 141         ret_stuff.v0 = 0;
 142
 143         SAL_CALL_NOLOCK(ret_stuff,
 144                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
 145                         (u64) segment, (u64) bus_number, (u64) devfn,
 146                         (u64) pci_dev,
 147                         sn_irq_info, 0, 0);
 148         return ret_stuff.v0;
 149 }
 150
 151 /*
 152  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
 153  *      each node in the system.
 154  */
 155 static void sn_fixup_ionodes(void)
 156 {
 157
 158         struct sn_flush_device_list *sn_flush_device_list;
 159         struct hubdev_info *hubdev;
 160         uint64_t status;
 161         uint64_t nasid;
 162         int i, widget;
 163
 164         /*
 165          * Get SGI Specific HUB chipset information.
 166          * Inform Prom that this kernel can support domain bus numbering.
 167          */
 168         for (i = 0; i < numionodes; i++) {
 169                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
 170                 nasid = cnodeid_to_nasid(i);
 171                 hubdev->max_segment_number = 0xffffffff;
 172                 hubdev->max_pcibus_number = 0xff;
 173                 status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
 174                 if (status)
 175                         continue;
 176
 177                 /* Save the largest Domain and pcibus numbers found. */
 178                 if (hubdev->max_segment_number) {
 179                         /*
 180                          * Dealing with a Prom that supports segments.
 181                          */
 182                         max_segment_number = hubdev->max_segment_number;
 183                         max_pcibus_number = hubdev->max_pcibus_number;
 184                 }
 185
 186                 /* Attach the error interrupt handlers */
 187                 if (nasid & 1)
 188                         ice_error_init(hubdev);
 189                 else
 190                         hub_error_init(hubdev);
 191
 192                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 193                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 194
 195                 if (!hubdev->hdi_flush_nasid_list.widget_p)
 196                         continue;
 197
 198                 hubdev->hdi_flush_nasid_list.widget_p =
 199                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
 200                             sizeof(struct sn_flush_device_list *), GFP_KERNEL);
 201
 202                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
 203                        (HUB_WIDGET_ID_MAX + 1) *
 204                        sizeof(struct sn_flush_device_list *));
 205
 206                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 207                         sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
 208                                                        sizeof(struct
 209                                                               sn_flush_device_list),
 210                                                        GFP_KERNEL);
 211                         memset(sn_flush_device_list, 0x0,
 212                                DEV_PER_WIDGET *
 213                                sizeof(struct sn_flush_device_list));
 214
 215                         status =
 216                             sal_get_widget_dmaflush_list(nasid, widget,
 217                                                          (uint64_t)
 218                                                          __pa
 219                                                          (sn_flush_device_list));
 220                         if (status) {
 221                                 kfree(sn_flush_device_list);
 222                                 continue;
 223                         }
 224
 225                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 226                             sn_flush_device_list;
 227                 }
 228
 229         }
 230
 231 }
 232
 233 void sn_pci_unfixup_slot(struct pci_dev *dev)
 234 {
 235         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 236
 237         sn_irq_unfixup(dev);
 238         pci_dev_put(host_pci_dev);
 239         pci_dev_put(dev);
 240 }
 241
 242 /*
 243  * sn_pci_fixup_slot() - This routine sets up a slot's resources
 244  * consistent with the Linux PCI abstraction layer.  Resources acquired
 245  * from our PCI provider include PIO maps to BAR space and interrupt
 246  * objects.
 247  */
 248 void sn_pci_fixup_slot(struct pci_dev *dev)
 249 {
 250         int idx;
 251         int segment = pci_domain_nr(dev->bus);
 252         int status = 0;
 253         struct pcibus_bussoft *bs;
 254         struct pci_bus *host_pci_bus;
 255         struct pci_dev *host_pci_dev;
 256         struct sn_irq_info *sn_irq_info;
 257         unsigned long size;
 258         unsigned int bus_no, devfn;
 259
 260         pci_dev_get(dev); /* for the sysdata pointer */
 261         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 262         if (SN_PCIDEV_INFO(dev) <= 0)
 263                 BUG();          /* Cannot afford to run out of memory */
 264         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
 265
 266         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 267         if (sn_irq_info <= 0)
 268                 BUG();          /* Cannot afford to run out of memory */
 269         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
 270
 271         /* Call to retrieve pci device information needed by kernel. */
 272         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 273                                      dev->devfn,
 274                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
 275                                      (u64) __pa(sn_irq_info));
 276         if (status)
 277                 BUG(); /* Cannot get platform pci device information */
 278
 279         /* Copy over PIO Mapped Addresses */
 280         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
 281                 unsigned long start, end, addr;
 282
 283                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
 284                         continue;
 285
 286                 start = dev->resource[idx].start;
 287                 end = dev->resource[idx].end;
 288                 size = end - start;
 289                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
 290                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 291                 dev->resource[idx].start = addr;
 292                 dev->resource[idx].end = addr + size;
 293                 if (dev->resource[idx].flags & IORESOURCE_IO)
 294                         dev->resource[idx].parent = &ioport_resource;
 295                 else
 296                         dev->resource[idx].parent = &iomem_resource;
 297         }
 298
 299         /*
 300          * Using the PROMs values for the PCI host bus, get the Linux
 301          * PCI host_pci_dev struct and set up host bus linkages
 302          */
 303
 304         bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
 305         devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
 306         host_pci_bus = pci_find_bus(segment, bus_no);
 307         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 308
 309         SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
 310         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 311                                                 SN_PCIDEV_INFO(host_pci_dev);
 312         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
 313         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 314         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 315
 316         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 317                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 318         } else {
 319                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 320         }
 321
 322         /* Only set up IRQ stuff if this device has a host bus context */
 323         if (bs && sn_irq_info->irq_irq) {
 324                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 325                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 326                 sn_irq_fixup(dev, sn_irq_info);
 327         } else {
 328                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
 329                 kfree(sn_irq_info);
 330         }
 331 }
 332
 333 /*
 334  * sn_pci_controller_fixup() - This routine sets up a bus's resources
 335  * consistent with the Linux PCI abstraction layer.
 336  */
 337 void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 338 {
 339         int status = 0;
 340         int nasid, cnode;
 341         struct pci_controller *controller;
 342         struct pcibus_bussoft *prom_bussoft_ptr;
 343         struct hubdev_info *hubdev_info;
 344         void *provider_soft;
 345         struct sn_pcibus_provider *provider;
 346
 347         status = sal_get_pcibus_info((u64) segment, (u64) busnum,
 348                                      (u64) ia64_tpa(&prom_bussoft_ptr));
 349         if (status > 0)
 350                 return;         /*bus # does not exist */
 351         prom_bussoft_ptr = __va(prom_bussoft_ptr);
 352
 353         controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
 354         controller->segment = segment;
 355         if (!controller)
 356                 BUG();
 357
 358         if (bus == NULL) {
 359                 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
 360                 if (bus == NULL)
 361                         return; /* error, or bus already scanned */
 362                 bus->sysdata = NULL;
 363         }
 364
 365         if (bus->sysdata)
 366                 goto error_return; /* sysdata already alloc'd */
 367
 368         /*
 369          * Per-provider fixup.  Copies the contents from prom to local
 370          * area and links SN_PCIBUS_BUSSOFT().
 371          */
 372
 373         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
 374                 return;         /* unsupported asic type */
 375
 376         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 377                 goto error_return; /* no further fixup necessary */
 378
 379         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 380         if (provider == NULL)
 381                 return;         /* no provider registerd for this asic */
 382
 383         provider_soft = NULL;
 384         if (provider->bus_fixup)
 385                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
 386
 387         if (provider_soft == NULL)
 388                 return;         /* fixup failed or not applicable */
 389
 390         /*
 391          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 392          * after this point.
 393          */
 394
 395         bus->sysdata = controller;
 396         PCI_CONTROLLER(bus)->platform_data = provider_soft;
 397         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 398         cnode = nasid_to_cnodeid(nasid);
 399         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 400         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 401             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 402
 403         /*
 404          * If the node information we obtained during the fixup phase is invalid
 405          * then set controller->node to -1 (undetermined)
 406          */
 407         if (controller->node >= num_online_nodes()) {
 408                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 409
 410                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
 411                                     "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 412                         b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 413                         b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 414                 printk(KERN_WARNING "on node %d but only %d nodes online."
 415                         "Association set to undetermined.\n",
 416                         controller->node, num_online_nodes());
 417                 controller->node = -1;
 418         }
 419         return;
 420
 421 error_return:
 422
 423         kfree(controller);
 424         return;
 425 }
 426
 427 void sn_bus_store_sysdata(struct pci_dev *dev)
 428 {
 429         struct sysdata_el *element;
 430
 431         element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
 432         if (!element) {
 433                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
 434                 return;
 435         }
 436         element->sysdata = dev->sysdata;
 437         list_add(&element->entry, &sn_sysdata_list);
 438 }
 439
 440 void sn_bus_free_sysdata(void)
 441 {
 442         struct sysdata_el *element;
 443         struct list_head *list;
 444
 445 sn_sysdata_free_start:
 446         list_for_each(list, &sn_sysdata_list) {
 447                 element = list_entry(list, struct sysdata_el, entry);
 448                 list_del(&element->entry);
 449                 kfree(element->sysdata);
 450                 kfree(element);
 451                 goto sn_sysdata_free_start;
 452         }
 453         return;
 454 }
 455
 456 /*
 457  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
 458  */
 459
 460 #define PCI_BUSES_TO_SCAN 256
 461
 462 static int __init sn_pci_init(void)
 463 {
 464         int i = 0;
 465         int j = 0;
 466         struct pci_dev *pci_dev = NULL;
 467         extern void sn_init_cpei_timer(void);
 468 #ifdef CONFIG_PROC_FS
 469         extern void register_sn_procfs(void);
 470 #endif
 471
 472         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 473                 return 0;
 474
 475         /*
 476          * prime sn_pci_provider[].  Individial provider init routines will
 477          * override their respective default entries.
 478          */
 479
 480         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 481                 sn_pci_provider[i] = &sn_pci_default_provider;
 482
 483         pcibr_init_provider();
 484         tioca_init_provider();
 485         tioce_init_provider();
 486
 487         /*
 488          * This is needed to avoid bounce limit checks in the blk layer
 489          */
 490         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 491         sn_fixup_ionodes();
 492         sn_irq_lh_init();
 493         INIT_LIST_HEAD(&sn_sysdata_list);
 494         sn_init_cpei_timer();
 495
 496 #ifdef CONFIG_PROC_FS
 497         register_sn_procfs();
 498 #endif
 499
 500         /* busses are not known yet ... */
 501         for (i = 0; i <= max_segment_number; i++)
 502                 for (j = 0; j <= max_pcibus_number; j++)
 503                         sn_pci_controller_fixup(i, j, NULL);
 504
 505         /*
 506          * Generic Linux PCI Layer has created the pci_bus and pci_dev
 507          * structures - time for us to add our SN PLatform specific
 508          * information.
 509          */
 510
 511         while ((pci_dev =
 512                 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
 513                 sn_pci_fixup_slot(pci_dev);
 514
 515         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
 516
 517         return 0;
 518 }
 519
 520 /*
 521  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 522  *      own NODE specific data area.
 523  */
 524 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 525 {
 526
 527         struct hubdev_info *hubdev_info;
 528
 529         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 530                 hubdev_info =
 531                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
 532                                                              sizeof(struct
 533                                                                     hubdev_info));
 534         else
 535                 hubdev_info =
 536                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
 537                                                              sizeof(struct
 538                                                                     hubdev_info));
 539         npda->pdinfo = (void *)hubdev_info;
 540
 541 }
 542
 543 geoid_t
 544 cnodeid_get_geoid(cnodeid_t cnode)
 545 {
 546
 547         struct hubdev_info *hubdev;
 548
 549         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 550         return hubdev->hdi_geoid;
 551
 552 }
 553
 554 subsys_initcall(sn_pci_init);
 555 EXPORT_SYMBOL(sn_pci_fixup_slot);
 556 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 557 EXPORT_SYMBOL(sn_pci_controller_fixup);
 558 EXPORT_SYMBOL(sn_bus_store_sysdata);
 559 EXPORT_SYMBOL(sn_bus_free_sysdata);