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