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 "xtalk/hubdev.h"
  22 #include "xtalk/xwidgetdev.h"
  23
  24 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
  25
  26 static struct list_head sn_sysdata_list;
  27
  28 /* sysdata list struct */
  29 struct sysdata_el {
  30         struct list_head entry;
  31         void *sysdata;
  32 };
  33
  34 struct slab_info {
  35         struct hubdev_info hubdev;
  36 };
  37
  38 struct brick {
  39         moduleid_t id;          /* Module ID of this module        */
  40         struct slab_info slab_info[MAX_SLABS + 1];
  41 };
  42
  43 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
  44
  45 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  46
  47 static int max_segment_number = 0; /* Default highest segment number */
  48 static int max_pcibus_number = 255; /* Default highest pci bus number */
  49
  50 /*
  51  * Hooks and struct for unsupported pci providers
  52  */
  53
  54 static dma_addr_t
  55 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
  56 {
  57         return 0;
  58 }
  59
  60 static void
  61 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  62 {
  63         return;
  64 }
  65
  66 static void *
  67 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
  68 {
  69         return NULL;
  70 }
  71
  72 static struct sn_pcibus_provider sn_pci_default_provider = {
  73         .dma_map = sn_default_pci_map,
  74         .dma_map_consistent = sn_default_pci_map,
  75         .dma_unmap = sn_default_pci_unmap,
  76         .bus_fixup = sn_default_pci_bus_fixup,
  77 };
  78
  79 /*
  80  * Retrieve the DMA Flush List given nasid.  This list is needed
  81  * to implement the WAR - Flush DMA data on PIO Reads.
  82  */
  83 static inline uint64_t
  84 sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, 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_WIDGET_DMAFLUSH_LIST,
  93                         (u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
  94                         0);
  95         return ret_stuff.v0;
  96
  97 }
  98
  99 /*
 100  * Retrieve the hub device info structure for the given nasid.
 101  */
 102 static inline uint64_t 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 uint64_t 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 uint64_t
 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_fixup_ionodes() - This routine initializes the HUB data strcuture for
 152  *      each node in the system.
 153  */
 154 static void sn_fixup_ionodes(void)
 155 {
 156
 157         struct sn_flush_device_list *sn_flush_device_list;
 158         struct hubdev_info *hubdev;
 159         uint64_t status;
 160         uint64_t nasid;
 161         int i, widget;
 162
 163         /*
 164          * Get SGI Specific HUB chipset information.
 165          * Inform Prom that this kernel can support domain bus numbering.
 166          */
 167         for (i = 0; i < numionodes; i++) {
 168                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
 169                 nasid = cnodeid_to_nasid(i);
 170                 hubdev->max_segment_number = 0xffffffff;
 171                 hubdev->max_pcibus_number = 0xff;
 172                 status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
 173                 if (status)
 174                         continue;
 175
 176                 /* Save the largest Domain and pcibus numbers found. */
 177                 if (hubdev->max_segment_number) {
 178                         /*
 179                          * Dealing with a Prom that supports segments.
 180                          */
 181                         max_segment_number = hubdev->max_segment_number;
 182                         max_pcibus_number = hubdev->max_pcibus_number;
 183                 }
 184
 185                 /* Attach the error interrupt handlers */
 186                 if (nasid & 1)
 187                         ice_error_init(hubdev);
 188                 else
 189                         hub_error_init(hubdev);
 190
 191                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 192                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 193
 194                 if (!hubdev->hdi_flush_nasid_list.widget_p)
 195                         continue;
 196
 197                 hubdev->hdi_flush_nasid_list.widget_p =
 198                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
 199                             sizeof(struct sn_flush_device_list *), GFP_KERNEL);
 200
 201                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
 202                        (HUB_WIDGET_ID_MAX + 1) *
 203                        sizeof(struct sn_flush_device_list *));
 204
 205                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 206                         sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
 207                                                        sizeof(struct
 208                                                               sn_flush_device_list),
 209                                                        GFP_KERNEL);
 210                         memset(sn_flush_device_list, 0x0,
 211                                DEV_PER_WIDGET *
 212                                sizeof(struct sn_flush_device_list));
 213
 214                         status =
 215                             sal_get_widget_dmaflush_list(nasid, widget,
 216                                                          (uint64_t)
 217                                                          __pa
 218                                                          (sn_flush_device_list));
 219                         if (status) {
 220                                 kfree(sn_flush_device_list);
 221                                 continue;
 222                         }
 223
 224                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 225                             sn_flush_device_list;
 226                 }
 227
 228         }
 229
 230 }
 231
 232 void sn_pci_unfixup_slot(struct pci_dev *dev)
 233 {
 234         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 235
 236         sn_irq_unfixup(dev);
 237         pci_dev_put(host_pci_dev);
 238         pci_dev_put(dev);
 239 }
 240
 241 /*
 242  * sn_pci_fixup_slot() - This routine sets up a slot's resources
 243  * consistent with the Linux PCI abstraction layer.  Resources acquired
 244  * from our PCI provider include PIO maps to BAR space and interrupt
 245  * objects.
 246  */
 247 void sn_pci_fixup_slot(struct pci_dev *dev)
 248 {
 249         int idx;
 250         int segment = pci_domain_nr(dev->bus);
 251         int status = 0;
 252         struct pcibus_bussoft *bs;
 253         struct pci_bus *host_pci_bus;
 254         struct pci_dev *host_pci_dev;
 255         struct sn_irq_info *sn_irq_info;
 256         unsigned long size;
 257         unsigned int bus_no, devfn;
 258
 259         pci_dev_get(dev); /* for the sysdata pointer */
 260         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 261         if (SN_PCIDEV_INFO(dev) <= 0)
 262                 BUG();          /* Cannot afford to run out of memory */
 263         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
 264
 265         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 266         if (sn_irq_info <= 0)
 267                 BUG();          /* Cannot afford to run out of memory */
 268         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
 269
 270         /* Call to retrieve pci device information needed by kernel. */
 271         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 272                                      dev->devfn,
 273                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
 274                                      (u64) __pa(sn_irq_info));
 275         if (status)
 276                 BUG(); /* Cannot get platform pci device information */
 277
 278         /* Copy over PIO Mapped Addresses */
 279         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
 280                 unsigned long start, end, addr;
 281
 282                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
 283                         continue;
 284
 285                 start = dev->resource[idx].start;
 286                 end = dev->resource[idx].end;
 287                 size = end - start;
 288                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
 289                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 290                 dev->resource[idx].start = addr;
 291                 dev->resource[idx].end = addr + size;
 292                 if (dev->resource[idx].flags & IORESOURCE_IO)
 293                         dev->resource[idx].parent = &ioport_resource;
 294                 else
 295                         dev->resource[idx].parent = &iomem_resource;
 296         }
 297
 298         /*
 299          * Using the PROMs values for the PCI host bus, get the Linux
 300          * PCI host_pci_dev struct and set up host bus linkages
 301          */
 302
 303         bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
 304         devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
 305         host_pci_bus = pci_find_bus(segment, bus_no);
 306         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 307
 308         SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
 309         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 310                                                 SN_PCIDEV_INFO(host_pci_dev);
 311         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
 312         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 313         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 314
 315         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 316                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 317         } else {
 318                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 319         }
 320
 321         /* Only set up IRQ stuff if this device has a host bus context */
 322         if (bs && sn_irq_info->irq_irq) {
 323                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 324                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 325                 sn_irq_fixup(dev, sn_irq_info);
 326         } else {
 327                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
 328                 kfree(sn_irq_info);
 329         }
 330 }
 331
 332 /*
 333  * sn_pci_controller_fixup() - This routine sets up a bus's resources
 334  * consistent with the Linux PCI abstraction layer.
 335  */
 336 void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 337 {
 338         int status = 0;
 339         int nasid, cnode;
 340         struct pci_controller *controller;
 341         struct pcibus_bussoft *prom_bussoft_ptr;
 342         struct hubdev_info *hubdev_info;
 343         void *provider_soft;
 344         struct sn_pcibus_provider *provider;
 345
 346         status = sal_get_pcibus_info((u64) segment, (u64) busnum,
 347                                      (u64) ia64_tpa(&prom_bussoft_ptr));
 348         if (status > 0)
 349                 return;         /*bus # does not exist */
 350         prom_bussoft_ptr = __va(prom_bussoft_ptr);
 351
 352         controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
 353         controller->segment = segment;
 354         if (!controller)
 355                 BUG();
 356
 357         if (bus == NULL) {
 358                 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
 359                 if (bus == NULL)
 360                         return; /* error, or bus already scanned */
 361                 bus->sysdata = NULL;
 362         }
 363
 364         if (bus->sysdata)
 365                 goto error_return; /* sysdata already alloc'd */
 366
 367         /*
 368          * Per-provider fixup.  Copies the contents from prom to local
 369          * area and links SN_PCIBUS_BUSSOFT().
 370          */
 371
 372         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
 373                 return;         /* unsupported asic type */
 374
 375         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 376                 goto error_return; /* no further fixup necessary */
 377
 378         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 379         if (provider == NULL)
 380                 return;         /* no provider registerd for this asic */
 381
 382         provider_soft = NULL;
 383         if (provider->bus_fixup)
 384                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
 385
 386         if (provider_soft == NULL)
 387                 return;         /* fixup failed or not applicable */
 388
 389         /*
 390          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 391          * after this point.
 392          */
 393
 394         bus->sysdata = controller;
 395         PCI_CONTROLLER(bus)->platform_data = provider_soft;
 396         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 397         cnode = nasid_to_cnodeid(nasid);
 398         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 399         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 400             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 401
 402         /*
 403          * If the node information we obtained during the fixup phase is invalid
 404          * then set controller->node to -1 (undetermined)
 405          */
 406         if (controller->node >= num_online_nodes()) {
 407                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 408
 409                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
 410                                     "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 411                         b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 412                         b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 413                 printk(KERN_WARNING "on node %d but only %d nodes online."
 414                         "Association set to undetermined.\n",
 415                         controller->node, num_online_nodes());
 416                 controller->node = -1;
 417         }
 418         return;
 419
 420 error_return:
 421
 422         kfree(controller);
 423         return;
 424 }
 425
 426 void sn_bus_store_sysdata(struct pci_dev *dev)
 427 {
 428         struct sysdata_el *element;
 429
 430         element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
 431         if (!element) {
 432                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
 433                 return;
 434         }
 435         element->sysdata = dev->sysdata;
 436         list_add(&element->entry, &sn_sysdata_list);
 437 }
 438
 439 void sn_bus_free_sysdata(void)
 440 {
 441         struct sysdata_el *element;
 442         struct list_head *list;
 443
 444 sn_sysdata_free_start:
 445         list_for_each(list, &sn_sysdata_list) {
 446                 element = list_entry(list, struct sysdata_el, entry);
 447                 list_del(&element->entry);
 448                 kfree(element->sysdata);
 449                 kfree(element);
 450                 goto sn_sysdata_free_start;
 451         }
 452         return;
 453 }
 454
 455 /*
 456  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
 457  */
 458
 459 #define PCI_BUSES_TO_SCAN 256
 460
 461 static int __init sn_pci_init(void)
 462 {
 463         int i = 0;
 464         int j = 0;
 465         struct pci_dev *pci_dev = NULL;
 466         extern void sn_init_cpei_timer(void);
 467 #ifdef CONFIG_PROC_FS
 468         extern void register_sn_procfs(void);
 469 #endif
 470
 471         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 472                 return 0;
 473
 474         /*
 475          * prime sn_pci_provider[].  Individial provider init routines will
 476          * override their respective default entries.
 477          */
 478
 479         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 480                 sn_pci_provider[i] = &sn_pci_default_provider;
 481
 482         pcibr_init_provider();
 483         tioca_init_provider();
 484
 485         /*
 486          * This is needed to avoid bounce limit checks in the blk layer
 487          */
 488         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 489         sn_fixup_ionodes();
 490         sn_irq_lh_init();
 491         INIT_LIST_HEAD(&sn_sysdata_list);
 492         sn_init_cpei_timer();
 493
 494 #ifdef CONFIG_PROC_FS
 495         register_sn_procfs();
 496 #endif
 497
 498         /* busses are not known yet ... */
 499         for (i = 0; i <= max_segment_number; i++)
 500                 for (j = 0; j <= max_pcibus_number; j++)
 501                         sn_pci_controller_fixup(i, j, NULL);
 502
 503         /*
 504          * Generic Linux PCI Layer has created the pci_bus and pci_dev
 505          * structures - time for us to add our SN PLatform specific
 506          * information.
 507          */
 508
 509         while ((pci_dev =
 510                 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
 511                 sn_pci_fixup_slot(pci_dev);
 512
 513         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
 514
 515         return 0;
 516 }
 517
 518 /*
 519  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 520  *      own NODE specific data area.
 521  */
 522 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 523 {
 524
 525         struct hubdev_info *hubdev_info;
 526
 527         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 528                 hubdev_info =
 529                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
 530                                                              sizeof(struct
 531                                                                     hubdev_info));
 532         else
 533                 hubdev_info =
 534                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
 535                                                              sizeof(struct
 536                                                                     hubdev_info));
 537         npda->pdinfo = (void *)hubdev_info;
 538
 539 }
 540
 541 geoid_t
 542 cnodeid_get_geoid(cnodeid_t cnode)
 543 {
 544
 545         struct hubdev_info *hubdev;
 546
 547         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 548         return hubdev->hdi_geoid;
 549
 550 }
 551
 552 subsys_initcall(sn_pci_init);
 553 EXPORT_SYMBOL(sn_pci_fixup_slot);
 554 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 555 EXPORT_SYMBOL(sn_pci_controller_fixup);
 556 EXPORT_SYMBOL(sn_bus_store_sysdata);
 557 EXPORT_SYMBOL(sn_bus_free_sysdata);