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                         spin_lock_init(&sn_flush_device_list->sfdl_flush_lock);
 226                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 227                             sn_flush_device_list;
 228                 }
 229
 230         }
 231
 232 }
 233
 234 void sn_pci_unfixup_slot(struct pci_dev *dev)
 235 {
 236         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 237
 238         sn_irq_unfixup(dev);
 239         pci_dev_put(host_pci_dev);
 240         pci_dev_put(dev);
 241 }
 242
 243 /*
 244  * sn_pci_fixup_slot() - This routine sets up a slot's resources
 245  * consistent with the Linux PCI abstraction layer.  Resources acquired
 246  * from our PCI provider include PIO maps to BAR space and interrupt
 247  * objects.
 248  */
 249 void sn_pci_fixup_slot(struct pci_dev *dev)
 250 {
 251         int idx;
 252         int segment = pci_domain_nr(dev->bus);
 253         int status = 0;
 254         struct pcibus_bussoft *bs;
 255         struct pci_bus *host_pci_bus;
 256         struct pci_dev *host_pci_dev;
 257         struct sn_irq_info *sn_irq_info;
 258         unsigned long size;
 259         unsigned int bus_no, devfn;
 260
 261         pci_dev_get(dev); /* for the sysdata pointer */
 262         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 263         if (SN_PCIDEV_INFO(dev) <= 0)
 264                 BUG();          /* Cannot afford to run out of memory */
 265         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
 266
 267         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 268         if (sn_irq_info <= 0)
 269                 BUG();          /* Cannot afford to run out of memory */
 270         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
 271
 272         /* Call to retrieve pci device information needed by kernel. */
 273         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 274                                      dev->devfn,
 275                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
 276                                      (u64) __pa(sn_irq_info));
 277         if (status)
 278                 BUG(); /* Cannot get platform pci device information */
 279
 280         /* Copy over PIO Mapped Addresses */
 281         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
 282                 unsigned long start, end, addr;
 283
 284                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
 285                         continue;
 286
 287                 start = dev->resource[idx].start;
 288                 end = dev->resource[idx].end;
 289                 size = end - start;
 290                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
 291                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 292                 dev->resource[idx].start = addr;
 293                 dev->resource[idx].end = addr + size;
 294                 if (dev->resource[idx].flags & IORESOURCE_IO)
 295                         dev->resource[idx].parent = &ioport_resource;
 296                 else
 297                         dev->resource[idx].parent = &iomem_resource;
 298         }
 299
 300         /*
 301          * Using the PROMs values for the PCI host bus, get the Linux
 302          * PCI host_pci_dev struct and set up host bus linkages
 303          */
 304
 305         bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
 306         devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
 307         host_pci_bus = pci_find_bus(segment, bus_no);
 308         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 309
 310         SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
 311         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 312                                                 SN_PCIDEV_INFO(host_pci_dev);
 313         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
 314         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 315         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 316
 317         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 318                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 319         } else {
 320                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 321         }
 322
 323         /* Only set up IRQ stuff if this device has a host bus context */
 324         if (bs && sn_irq_info->irq_irq) {
 325                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 326                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 327                 sn_irq_fixup(dev, sn_irq_info);
 328         } else {
 329                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
 330                 kfree(sn_irq_info);
 331         }
 332 }
 333
 334 /*
 335  * sn_pci_controller_fixup() - This routine sets up a bus's resources
 336  * consistent with the Linux PCI abstraction layer.
 337  */
 338 void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 339 {
 340         int status = 0;
 341         int nasid, cnode;
 342         struct pci_controller *controller;
 343         struct pcibus_bussoft *prom_bussoft_ptr;
 344         struct hubdev_info *hubdev_info;
 345         void *provider_soft = NULL;
 346         struct sn_pcibus_provider *provider;
 347
 348         status = sal_get_pcibus_info((u64) segment, (u64) busnum,
 349                                      (u64) ia64_tpa(&prom_bussoft_ptr));
 350         if (status > 0)
 351                 return;         /*bus # does not exist */
 352         prom_bussoft_ptr = __va(prom_bussoft_ptr);
 353
 354         controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
 355         controller->segment = segment;
 356         if (!controller)
 357                 BUG();
 358
 359         if (bus == NULL) {
 360                 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
 361                 if (bus == NULL)
 362                         goto error_return; /* error, or bus already scanned */
 363                 bus->sysdata = NULL;
 364         }
 365
 366         if (bus->sysdata)
 367                 goto error_return; /* sysdata already alloc'd */
 368
 369         /*
 370          * Per-provider fixup.  Copies the contents from prom to local
 371          * area and links SN_PCIBUS_BUSSOFT().
 372          */
 373
 374         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
 375                 goto error_return; /* unsupported asic type */
 376
 377         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 378                 goto error_return; /* no further fixup necessary */
 379
 380         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 381         if (provider == NULL)
 382                 goto error_return; /* no provider registerd for this asic */
 383
 384         bus->sysdata = controller;
 385         if (provider->bus_fixup)
 386                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
 387
 388         if (provider_soft == NULL) {
 389                 /* fixup failed or not applicable */
 390                 bus->sysdata = NULL;
 391                 goto error_return;
 392         }
 393
 394         /*
 395          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 396          * after this point.
 397          */
 398
 399         PCI_CONTROLLER(bus)->platform_data = provider_soft;
 400         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 401         cnode = nasid_to_cnodeid(nasid);
 402         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 403         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 404             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 405
 406         /*
 407          * If the node information we obtained during the fixup phase is invalid
 408          * then set controller->node to -1 (undetermined)
 409          */
 410         if (controller->node >= num_online_nodes()) {
 411                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 412
 413                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
 414                                     "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 415                         b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 416                         b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 417                 printk(KERN_WARNING "on node %d but only %d nodes online."
 418                         "Association set to undetermined.\n",
 419                         controller->node, num_online_nodes());
 420                 controller->node = -1;
 421         }
 422         return;
 423
 424 error_return:
 425
 426         kfree(controller);
 427         return;
 428 }
 429
 430 void sn_bus_store_sysdata(struct pci_dev *dev)
 431 {
 432         struct sysdata_el *element;
 433
 434         element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
 435         if (!element) {
 436                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
 437                 return;
 438         }
 439         element->sysdata = dev->sysdata;
 440         list_add(&element->entry, &sn_sysdata_list);
 441 }
 442
 443 void sn_bus_free_sysdata(void)
 444 {
 445         struct sysdata_el *element;
 446         struct list_head *list;
 447
 448 sn_sysdata_free_start:
 449         list_for_each(list, &sn_sysdata_list) {
 450                 element = list_entry(list, struct sysdata_el, entry);
 451                 list_del(&element->entry);
 452                 kfree(element->sysdata);
 453                 kfree(element);
 454                 goto sn_sysdata_free_start;
 455         }
 456         return;
 457 }
 458
 459 /*
 460  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
 461  */
 462
 463 #define PCI_BUSES_TO_SCAN 256
 464
 465 static int __init sn_pci_init(void)
 466 {
 467         int i = 0;
 468         int j = 0;
 469         struct pci_dev *pci_dev = NULL;
 470         extern void sn_init_cpei_timer(void);
 471 #ifdef CONFIG_PROC_FS
 472         extern void register_sn_procfs(void);
 473 #endif
 474
 475         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 476                 return 0;
 477
 478         /*
 479          * prime sn_pci_provider[].  Individial provider init routines will
 480          * override their respective default entries.
 481          */
 482
 483         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 484                 sn_pci_provider[i] = &sn_pci_default_provider;
 485
 486         pcibr_init_provider();
 487         tioca_init_provider();
 488         tioce_init_provider();
 489
 490         /*
 491          * This is needed to avoid bounce limit checks in the blk layer
 492          */
 493         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 494         sn_fixup_ionodes();
 495         sn_irq_lh_init();
 496         INIT_LIST_HEAD(&sn_sysdata_list);
 497         sn_init_cpei_timer();
 498
 499 #ifdef CONFIG_PROC_FS
 500         register_sn_procfs();
 501 #endif
 502
 503         /* busses are not known yet ... */
 504         for (i = 0; i <= max_segment_number; i++)
 505                 for (j = 0; j <= max_pcibus_number; j++)
 506                         sn_pci_controller_fixup(i, j, NULL);
 507
 508         /*
 509          * Generic Linux PCI Layer has created the pci_bus and pci_dev
 510          * structures - time for us to add our SN PLatform specific
 511          * information.
 512          */
 513
 514         while ((pci_dev =
 515                 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
 516                 sn_pci_fixup_slot(pci_dev);
 517
 518         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
 519
 520         return 0;
 521 }
 522
 523 /*
 524  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 525  *      own NODE specific data area.
 526  */
 527 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 528 {
 529
 530         struct hubdev_info *hubdev_info;
 531
 532         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 533                 hubdev_info =
 534                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
 535                                                              sizeof(struct
 536                                                                     hubdev_info));
 537         else
 538                 hubdev_info =
 539                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
 540                                                              sizeof(struct
 541                                                                     hubdev_info));
 542         npda->pdinfo = (void *)hubdev_info;
 543
 544 }
 545
 546 geoid_t
 547 cnodeid_get_geoid(cnodeid_t cnode)
 548 {
 549
 550         struct hubdev_info *hubdev;
 551
 552         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 553         return hubdev->hdi_geoid;
 554
 555 }
 556
 557 subsys_initcall(sn_pci_init);
 558 EXPORT_SYMBOL(sn_pci_fixup_slot);
 559 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 560 EXPORT_SYMBOL(sn_pci_controller_fixup);
 561 EXPORT_SYMBOL(sn_bus_store_sysdata);
 562 EXPORT_SYMBOL(sn_bus_free_sysdata);