arch/ia64/sn/kernel/io_common.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) 2006 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/bootmem.h>
  10 #include <asm/sn/types.h>
  11 #include <asm/sn/addrs.h>
  12 #include <asm/sn/sn_feature_sets.h>
  13 #include <asm/sn/geo.h>
  14 #include <asm/sn/io.h>
  15 #include <asm/sn/l1.h>
  16 #include <asm/sn/module.h>
  17 #include <asm/sn/pcibr_provider.h>
  18 #include <asm/sn/pcibus_provider_defs.h>
  19 #include <asm/sn/pcidev.h>
  20 #include <asm/sn/simulator.h>
  21 #include <asm/sn/sn_sal.h>
  22 #include <asm/sn/tioca_provider.h>
  23 #include <asm/sn/tioce_provider.h>
  24 #include "xtalk/hubdev.h"
  25 #include "xtalk/xwidgetdev.h"
  26 #include <linux/acpi.h>
  27 #include <asm/sn/sn2/sn_hwperf.h>
  28 #include <asm/sn/acpi.h>
  29
  30 extern void sn_init_cpei_timer(void);
  31 extern void register_sn_procfs(void);
  32 extern void sn_io_acpi_init(void);
  33 extern void sn_io_init(void);
  34
  35
  36 static struct list_head sn_sysdata_list;
  37
  38 /* sysdata list struct */
  39 struct sysdata_el {
  40         struct list_head entry;
  41         void *sysdata;
  42 };
  43
  44 int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
  45
  46 int sn_acpi_rev;                /* SN ACPI revision */
  47 EXPORT_SYMBOL_GPL(sn_acpi_rev);
  48
  49 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  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, int type)
  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, widget, and device.
  82  * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
  83  */
  84 static inline u64
  85 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
  86                              u64 address)
  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_DEVICE_DMAFLUSH_LIST,
  94                         (u64) nasid, (u64) widget_num,
  95                         (u64) device_num, (u64) address, 0, 0, 0);
  96         return ret_stuff.status;
  97 }
  98
  99 /*
 100  * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
 101  *                        device.
 102  */
 103 inline struct pcidev_info *
 104 sn_pcidev_info_get(struct pci_dev *dev)
 105 {
 106         struct pcidev_info *pcidev;
 107
 108         list_for_each_entry(pcidev,
 109                             &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
 110                 if (pcidev->pdi_linux_pcidev == dev)
 111                         return pcidev;
 112         }
 113         return NULL;
 114 }
 115
 116 /* Older PROM flush WAR
 117  *
 118  * 01/16/06 -- This war will be in place until a new official PROM is released.
 119  * Additionally note that the struct sn_flush_device_war also has to be
 120  * removed from arch/ia64/sn/include/xtalk/hubdev.h
 121  */
 122 static u8 war_implemented = 0;
 123
 124 static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
 125                                struct sn_flush_device_common *common)
 126 {
 127         struct sn_flush_device_war *war_list;
 128         struct sn_flush_device_war *dev_entry;
 129         struct ia64_sal_retval isrv = {0,0,0,0};
 130
 131         if (!war_implemented) {
 132                 printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
 133                        "PROM flush WAR\n");
 134                 war_implemented = 1;
 135         }
 136
 137         war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
 138         if (!war_list)
 139                 BUG();
 140
 141         SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
 142                         nasid, widget, __pa(war_list), 0, 0, 0 ,0);
 143         if (isrv.status)
 144                 panic("sn_device_fixup_war failed: %s\n",
 145                       ia64_sal_strerror(isrv.status));
 146
 147         dev_entry = war_list + device;
 148         memcpy(common,dev_entry, sizeof(*common));
 149         kfree(war_list);
 150
 151         return isrv.status;
 152 }
 153
 154 /*
 155  * sn_common_hubdev_init() - This routine is called to initialize the HUB data
 156  *                           structure for each node in the system.
 157  */
 158 void __init
 159 sn_common_hubdev_init(struct hubdev_info *hubdev)
 160 {
 161
 162         struct sn_flush_device_kernel *sn_flush_device_kernel;
 163         struct sn_flush_device_kernel *dev_entry;
 164         s64 status;
 165         int widget, device, size;
 166
 167         /* Attach the error interrupt handlers */
 168         if (hubdev->hdi_nasid & 1)      /* If TIO */
 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                 return;
 178
 179         size = (HUB_WIDGET_ID_MAX + 1) *
 180                 sizeof(struct sn_flush_device_kernel *);
 181         hubdev->hdi_flush_nasid_list.widget_p =
 182                 kzalloc(size, GFP_KERNEL);
 183         if (!hubdev->hdi_flush_nasid_list.widget_p)
 184                 BUG();
 185
 186         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 187                 size = DEV_PER_WIDGET *
 188                         sizeof(struct sn_flush_device_kernel);
 189                 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
 190                 if (!sn_flush_device_kernel)
 191                         BUG();
 192
 193                 dev_entry = sn_flush_device_kernel;
 194                 for (device = 0; device < DEV_PER_WIDGET;
 195                      device++, dev_entry++) {
 196                         size = sizeof(struct sn_flush_device_common);
 197                         dev_entry->common = kzalloc(size, GFP_KERNEL);
 198                         if (!dev_entry->common)
 199                                 BUG();
 200                         if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
 201                                 status = sal_get_device_dmaflush_list(
 202                                              hubdev->hdi_nasid, widget, device,
 203                                              (u64)(dev_entry->common));
 204                         else
 205                                 status = sn_device_fixup_war(hubdev->hdi_nasid,
 206                                                              widget, device,
 207                                                              dev_entry->common);
 208                         if (status != SALRET_OK)
 209                                 panic("SAL call failed: %s\n",
 210                                       ia64_sal_strerror(status));
 211
 212                         spin_lock_init(&dev_entry->sfdl_flush_lock);
 213                 }
 214
 215                 if (sn_flush_device_kernel)
 216                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 217                                                          sn_flush_device_kernel;
 218         }
 219 }
 220
 221 void sn_pci_unfixup_slot(struct pci_dev *dev)
 222 {
 223         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 224
 225         sn_irq_unfixup(dev);
 226         pci_dev_put(host_pci_dev);
 227         pci_dev_put(dev);
 228 }
 229
 230 /*
 231  * sn_pci_fixup_slot()
 232  */
 233 void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
 234                        struct sn_irq_info *sn_irq_info)
 235 {
 236         int segment = pci_domain_nr(dev->bus);
 237         struct pcibus_bussoft *bs;
 238         struct pci_bus *host_pci_bus;
 239         struct pci_dev *host_pci_dev;
 240         unsigned int bus_no, devfn;
 241
 242         pci_dev_get(dev); /* for the sysdata pointer */
 243
 244         /* Add pcidev_info to list in pci_controller.platform_data */
 245         list_add_tail(&pcidev_info->pdi_list,
 246                       &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
 247         /*
 248          * Using the PROMs values for the PCI host bus, get the Linux
 249          * PCI host_pci_dev struct and set up host bus linkages
 250          */
 251
 252         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
 253         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
 254         host_pci_bus = pci_find_bus(segment, bus_no);
 255         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 256
 257         pcidev_info->host_pci_dev = host_pci_dev;
 258         pcidev_info->pdi_linux_pcidev = dev;
 259         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
 260         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 261         pcidev_info->pdi_pcibus_info = bs;
 262
 263         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 264                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 265         } else {
 266                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 267         }
 268
 269         /* Only set up IRQ stuff if this device has a host bus context */
 270         if (bs && sn_irq_info->irq_irq) {
 271                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
 272                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
 273                 sn_irq_fixup(dev, sn_irq_info);
 274         } else {
 275                 pcidev_info->pdi_sn_irq_info = NULL;
 276                 kfree(sn_irq_info);
 277         }
 278 }
 279
 280 /*
 281  * sn_common_bus_fixup - Perform platform specific bus fixup.
 282  *                       Execute the ASIC specific fixup routine
 283  *                       for this bus.
 284  */
 285 void
 286 sn_common_bus_fixup(struct pci_bus *bus,
 287                     struct pcibus_bussoft *prom_bussoft_ptr)
 288 {
 289         int cnode;
 290         struct pci_controller *controller;
 291         struct hubdev_info *hubdev_info;
 292         int nasid;
 293         void *provider_soft;
 294         struct sn_pcibus_provider *provider;
 295         struct sn_platform_data *sn_platform_data;
 296
 297         controller = PCI_CONTROLLER(bus);
 298         /*
 299          * Per-provider fixup.  Copies the bus soft structure from prom
 300          * to local area and links SN_PCIBUS_BUSSOFT().
 301          */
 302
 303         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 304                 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
 305                        prom_bussoft_ptr->bs_asic_type);
 306                 return;
 307         }
 308
 309         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 310                 return; /* no further fixup necessary */
 311
 312         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 313         if (provider == NULL)
 314                 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
 315                       prom_bussoft_ptr->bs_asic_type);
 316
 317         if (provider->bus_fixup)
 318                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
 319                                  controller);
 320         else
 321                 provider_soft = NULL;
 322
 323         /*
 324          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 325          * after this point.
 326          */
 327         controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
 328                                             GFP_KERNEL);
 329         if (controller->platform_data == NULL)
 330                 BUG();
 331         sn_platform_data =
 332                         (struct sn_platform_data *) controller->platform_data;
 333         sn_platform_data->provider_soft = provider_soft;
 334         INIT_LIST_HEAD(&((struct sn_platform_data *)
 335                          controller->platform_data)->pcidev_info);
 336         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 337         cnode = nasid_to_cnodeid(nasid);
 338         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 339         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 340             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 341
 342         /*
 343          * If the node information we obtained during the fixup phase is
 344          * invalid then set controller->node to -1 (undetermined)
 345          */
 346         if (controller->node >= num_online_nodes()) {
 347                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 348
 349                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
 350                        "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 351                        b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 352                        b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 353                 printk(KERN_WARNING "on node %d but only %d nodes online."
 354                        "Association set to undetermined.\n",
 355                        controller->node, num_online_nodes());
 356                 controller->node = -1;
 357         }
 358 }
 359
 360 void sn_bus_store_sysdata(struct pci_dev *dev)
 361 {
 362         struct sysdata_el *element;
 363
 364         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
 365         if (!element) {
 366                 dev_dbg(&dev->dev, "%s: out of memory!\n", __func__);
 367                 return;
 368         }
 369         element->sysdata = SN_PCIDEV_INFO(dev);
 370         list_add(&element->entry, &sn_sysdata_list);
 371 }
 372
 373 void sn_bus_free_sysdata(void)
 374 {
 375         struct sysdata_el *element;
 376         struct list_head *list, *safe;
 377
 378         list_for_each_safe(list, safe, &sn_sysdata_list) {
 379                 element = list_entry(list, struct sysdata_el, entry);
 380                 list_del(&element->entry);
 381                 list_del(&(((struct pcidev_info *)
 382                              (element->sysdata))->pdi_list));
 383                 kfree(element->sysdata);
 384                 kfree(element);
 385         }
 386         return;
 387 }
 388
 389 /*
 390  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 391  *                      own NODE specific data area.
 392  */
 393 void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 394 {
 395         struct hubdev_info *hubdev_info;
 396         int size;
 397         pg_data_t *pg;
 398
 399         size = sizeof(struct hubdev_info);
 400
 401         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 402                 pg = NODE_DATA(0);
 403         else
 404                 pg = NODE_DATA(node);
 405
 406         hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
 407
 408         npda->pdinfo = (void *)hubdev_info;
 409 }
 410
 411 geoid_t
 412 cnodeid_get_geoid(cnodeid_t cnode)
 413 {
 414         struct hubdev_info *hubdev;
 415
 416         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 417         return hubdev->hdi_geoid;
 418 }
 419
 420 void sn_generate_path(struct pci_bus *pci_bus, char *address)
 421 {
 422         nasid_t nasid;
 423         cnodeid_t cnode;
 424         geoid_t geoid;
 425         moduleid_t moduleid;
 426         u16 bricktype;
 427
 428         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 429         cnode = nasid_to_cnodeid(nasid);
 430         geoid = cnodeid_get_geoid(cnode);
 431         moduleid = geo_module(geoid);
 432
 433         sprintf(address, "module_%c%c%c%c%.2d",
 434                 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
 435                 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
 436                 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
 437                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
 438
 439         /* Tollhouse requires slot id to be displayed */
 440         bricktype = MODULE_GET_BTYPE(moduleid);
 441         if ((bricktype == L1_BRICKTYPE_191010) ||
 442             (bricktype == L1_BRICKTYPE_1932))
 443                         sprintf(address, "%s^%d", address, geo_slot(geoid));
 444 }
 445
 446 void __devinit
 447 sn_pci_fixup_bus(struct pci_bus *bus)
 448 {
 449
 450         if (SN_ACPI_BASE_SUPPORT())
 451                 sn_acpi_bus_fixup(bus);
 452         else
 453                 sn_bus_fixup(bus);
 454 }
 455
 456 /*
 457  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 458  *                    In particular, setup the sn_pci_provider[] array.
 459  *                    This needs to be done prior to any bus scanning
 460  *                    (acpi_scan_init()) in the ACPI case, as the SN
 461  *                    bus fixup code will reference the array.
 462  */
 463 static int __init
 464 sn_io_early_init(void)
 465 {
 466         int i;
 467
 468         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 469                 return 0;
 470
 471         /* we set the acpi revision to that of the DSDT table OEM rev. */
 472         {
 473                 struct acpi_table_header *header = NULL;
 474
 475                 acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 476                 BUG_ON(header == NULL);
 477                 sn_acpi_rev = header->oem_revision;
 478         }
 479
 480         /*
 481          * prime sn_pci_provider[].  Individual provider init routines will
 482          * override their respective default entries.
 483          */
 484
 485         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 486                 sn_pci_provider[i] = &sn_pci_default_provider;
 487
 488         pcibr_init_provider();
 489         tioca_init_provider();
 490         tioce_init_provider();
 491
 492         /*
 493          * This is needed to avoid bounce limit checks in the blk layer
 494          */
 495         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 496
 497         sn_irq_lh_init();
 498         INIT_LIST_HEAD(&sn_sysdata_list);
 499         sn_init_cpei_timer();
 500
 501 #ifdef CONFIG_PROC_FS
 502         register_sn_procfs();
 503 #endif
 504
 505         {
 506                 struct acpi_table_header *header;
 507                 (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 508                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 509                         header->oem_revision);
 510         }
 511         if (SN_ACPI_BASE_SUPPORT())
 512                 sn_io_acpi_init();
 513         else
 514                 sn_io_init();
 515         return 0;
 516 }
 517
 518 arch_initcall(sn_io_early_init);
 519
 520 /*
 521  * sn_io_late_init() - Perform any final platform specific IO initialization.
 522  */
 523
 524 int __init
 525 sn_io_late_init(void)
 526 {
 527         struct pci_bus *bus;
 528         struct pcibus_bussoft *bussoft;
 529         cnodeid_t cnode;
 530         nasid_t nasid;
 531         cnodeid_t near_cnode;
 532
 533         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 534                 return 0;
 535
 536         /*
 537          * Setup closest node in pci_controller->node for
 538          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
 539          * info from the PROM).
 540          */
 541         bus = NULL;
 542         while ((bus = pci_find_next_bus(bus)) != NULL) {
 543                 bussoft = SN_PCIBUS_BUSSOFT(bus);
 544                 nasid = NASID_GET(bussoft->bs_base);
 545                 cnode = nasid_to_cnodeid(nasid);
 546                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
 547                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
 548                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
 549                         /* PCI Bridge: find nearest node with CPUs */
 550                         int e = sn_hwperf_get_nearest_node(cnode, NULL,
 551                                                            &near_cnode);
 552                         if (e < 0) {
 553                                 near_cnode = (cnodeid_t)-1; /* use any node */
 554                                 printk(KERN_WARNING "sn_io_late_init: failed "
 555                                        "to find near node with CPUs for "
 556                                        "node %d, err=%d\n", cnode, e);
 557                         }
 558                         PCI_CONTROLLER(bus)->node = near_cnode;
 559                 }
 560         }
 561
 562         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
 563
 564         return 0;
 565 }
 566
 567 fs_initcall(sn_io_late_init);
 568
 569 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 570 EXPORT_SYMBOL(sn_bus_store_sysdata);
 571 EXPORT_SYMBOL(sn_bus_free_sysdata);
 572 EXPORT_SYMBOL(sn_generate_path);
 573