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 <linux/export.h>
  11 #include <linux/slab.h>
  12 #include <asm/sn/types.h>
  13 #include <asm/sn/addrs.h>
  14 #include <asm/sn/sn_feature_sets.h>
  15 #include <asm/sn/geo.h>
  16 #include <asm/sn/io.h>
  17 #include <asm/sn/l1.h>
  18 #include <asm/sn/module.h>
  19 #include <asm/sn/pcibr_provider.h>
  20 #include <asm/sn/pcibus_provider_defs.h>
  21 #include <asm/sn/pcidev.h>
  22 #include <asm/sn/simulator.h>
  23 #include <asm/sn/sn_sal.h>
  24 #include <asm/sn/tioca_provider.h>
  25 #include <asm/sn/tioce_provider.h>
  26 #include "xtalk/hubdev.h"
  27 #include "xtalk/xwidgetdev.h"
  28 #include <linux/acpi.h>
  29 #include <asm/sn/sn2/sn_hwperf.h>
  30 #include <asm/sn/acpi.h>
  31
  32 extern void sn_init_cpei_timer(void);
  33 extern void register_sn_procfs(void);
  34 extern void sn_io_acpi_init(void);
  35 extern void sn_io_init(void);
  36
  37
  38 static struct list_head sn_sysdata_list;
  39
  40 /* sysdata list struct */
  41 struct sysdata_el {
  42         struct list_head entry;
  43         void *sysdata;
  44 };
  45
  46 int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
  47
  48 int sn_acpi_rev;                /* SN ACPI revision */
  49 EXPORT_SYMBOL_GPL(sn_acpi_rev);
  50
  51 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  52
  53 /*
  54  * Hooks and struct for unsupported pci providers
  55  */
  56
  57 static dma_addr_t
  58 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
  59 {
  60         return 0;
  61 }
  62
  63 static void
  64 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  65 {
  66         return;
  67 }
  68
  69 static void *
  70 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
  71 {
  72         return NULL;
  73 }
  74
  75 static struct sn_pcibus_provider sn_pci_default_provider = {
  76         .dma_map = sn_default_pci_map,
  77         .dma_map_consistent = sn_default_pci_map,
  78         .dma_unmap = sn_default_pci_unmap,
  79         .bus_fixup = sn_default_pci_bus_fixup,
  80 };
  81
  82 /*
  83  * Retrieve the DMA Flush List given nasid, widget, and device.
  84  * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
  85  */
  86 static inline u64
  87 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
  88                              u64 address)
  89 {
  90         struct ia64_sal_retval ret_stuff;
  91         ret_stuff.status = 0;
  92         ret_stuff.v0 = 0;
  93
  94         SAL_CALL_NOLOCK(ret_stuff,
  95                         (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
  96                         (u64) nasid, (u64) widget_num,
  97                         (u64) device_num, (u64) address, 0, 0, 0);
  98         return ret_stuff.status;
  99 }
 100
 101 /*
 102  * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
 103  *                        device.
 104  */
 105 inline struct pcidev_info *
 106 sn_pcidev_info_get(struct pci_dev *dev)
 107 {
 108         struct pcidev_info *pcidev;
 109
 110         list_for_each_entry(pcidev,
 111                             &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
 112                 if (pcidev->pdi_linux_pcidev == dev)
 113                         return pcidev;
 114         }
 115         return NULL;
 116 }
 117
 118 /* Older PROM flush WAR
 119  *
 120  * 01/16/06 -- This war will be in place until a new official PROM is released.
 121  * Additionally note that the struct sn_flush_device_war also has to be
 122  * removed from arch/ia64/sn/include/xtalk/hubdev.h
 123  */
 124
 125 static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
 126                                struct sn_flush_device_common *common)
 127 {
 128         struct sn_flush_device_war *war_list;
 129         struct sn_flush_device_war *dev_entry;
 130         struct ia64_sal_retval isrv = {0,0,0,0};
 131
 132         printk_once(KERN_WARNING
 133                 "PROM version < 4.50 -- implementing old PROM flush WAR\n");
 134
 135         war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
 136         BUG_ON(!war_list);
 137
 138         SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
 139                         nasid, widget, __pa(war_list), 0, 0, 0 ,0);
 140         if (isrv.status)
 141                 panic("sn_device_fixup_war failed: %s\n",
 142                       ia64_sal_strerror(isrv.status));
 143
 144         dev_entry = war_list + device;
 145         memcpy(common,dev_entry, sizeof(*common));
 146         kfree(war_list);
 147
 148         return isrv.status;
 149 }
 150
 151 /*
 152  * sn_common_hubdev_init() - This routine is called to initialize the HUB data
 153  *                           structure for each node in the system.
 154  */
 155 void __init
 156 sn_common_hubdev_init(struct hubdev_info *hubdev)
 157 {
 158
 159         struct sn_flush_device_kernel *sn_flush_device_kernel;
 160         struct sn_flush_device_kernel *dev_entry;
 161         s64 status;
 162         int widget, device, size;
 163
 164         /* Attach the error interrupt handlers */
 165         if (hubdev->hdi_nasid & 1)      /* If TIO */
 166                 ice_error_init(hubdev);
 167         else
 168                 hub_error_init(hubdev);
 169
 170         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 171                 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 172
 173         if (!hubdev->hdi_flush_nasid_list.widget_p)
 174                 return;
 175
 176         size = (HUB_WIDGET_ID_MAX + 1) *
 177                 sizeof(struct sn_flush_device_kernel *);
 178         hubdev->hdi_flush_nasid_list.widget_p =
 179                 kzalloc(size, GFP_KERNEL);
 180         BUG_ON(!hubdev->hdi_flush_nasid_list.widget_p);
 181
 182         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 183                 size = DEV_PER_WIDGET *
 184                         sizeof(struct sn_flush_device_kernel);
 185                 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
 186                 BUG_ON(!sn_flush_device_kernel);
 187
 188                 dev_entry = sn_flush_device_kernel;
 189                 for (device = 0; device < DEV_PER_WIDGET;
 190                      device++, dev_entry++) {
 191                         size = sizeof(struct sn_flush_device_common);
 192                         dev_entry->common = kzalloc(size, GFP_KERNEL);
 193                         BUG_ON(!dev_entry->common);
 194                         if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
 195                                 status = sal_get_device_dmaflush_list(
 196                                              hubdev->hdi_nasid, widget, device,
 197                                              (u64)(dev_entry->common));
 198                         else
 199                                 status = sn_device_fixup_war(hubdev->hdi_nasid,
 200                                                              widget, device,
 201                                                              dev_entry->common);
 202                         if (status != SALRET_OK)
 203                                 panic("SAL call failed: %s\n",
 204                                       ia64_sal_strerror(status));
 205
 206                         spin_lock_init(&dev_entry->sfdl_flush_lock);
 207                 }
 208
 209                 if (sn_flush_device_kernel)
 210                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 211                                                          sn_flush_device_kernel;
 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()
 226  */
 227 void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
 228                        struct sn_irq_info *sn_irq_info)
 229 {
 230         int segment = pci_domain_nr(dev->bus);
 231         struct pcibus_bussoft *bs;
 232         struct pci_dev *host_pci_dev;
 233         unsigned int bus_no, devfn;
 234
 235         pci_dev_get(dev); /* for the sysdata pointer */
 236
 237         /* Add pcidev_info to list in pci_controller.platform_data */
 238         list_add_tail(&pcidev_info->pdi_list,
 239                       &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
 240         /*
 241          * Using the PROMs values for the PCI host bus, get the Linux
 242          * PCI host_pci_dev struct and set up host bus linkages
 243          */
 244
 245         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
 246         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
 247         host_pci_dev = pci_get_domain_bus_and_slot(segment, bus_no, devfn);
 248
 249         pcidev_info->host_pci_dev = host_pci_dev;
 250         pcidev_info->pdi_linux_pcidev = dev;
 251         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
 252         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 253         pcidev_info->pdi_pcibus_info = bs;
 254
 255         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 256                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 257         } else {
 258                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 259         }
 260
 261         /* Only set up IRQ stuff if this device has a host bus context */
 262         if (bs && sn_irq_info->irq_irq) {
 263                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
 264                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
 265                 sn_irq_fixup(dev, sn_irq_info);
 266         } else {
 267                 pcidev_info->pdi_sn_irq_info = NULL;
 268                 kfree(sn_irq_info);
 269         }
 270 }
 271
 272 /*
 273  * sn_common_bus_fixup - Perform platform specific bus fixup.
 274  *                       Execute the ASIC specific fixup routine
 275  *                       for this bus.
 276  */
 277 void
 278 sn_common_bus_fixup(struct pci_bus *bus,
 279                     struct pcibus_bussoft *prom_bussoft_ptr)
 280 {
 281         int cnode;
 282         struct pci_controller *controller;
 283         struct hubdev_info *hubdev_info;
 284         int nasid;
 285         void *provider_soft;
 286         struct sn_pcibus_provider *provider;
 287         struct sn_platform_data *sn_platform_data;
 288
 289         controller = PCI_CONTROLLER(bus);
 290         /*
 291          * Per-provider fixup.  Copies the bus soft structure from prom
 292          * to local area and links SN_PCIBUS_BUSSOFT().
 293          */
 294
 295         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 296                 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
 297                        prom_bussoft_ptr->bs_asic_type);
 298                 return;
 299         }
 300
 301         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 302                 return; /* no further fixup necessary */
 303
 304         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 305         if (provider == NULL)
 306                 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
 307                       prom_bussoft_ptr->bs_asic_type);
 308
 309         if (provider->bus_fixup)
 310                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
 311                                  controller);
 312         else
 313                 provider_soft = NULL;
 314
 315         /*
 316          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 317          * after this point.
 318          */
 319         controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
 320                                             GFP_KERNEL);
 321         BUG_ON(controller->platform_data == NULL);
 322         sn_platform_data =
 323                         (struct sn_platform_data *) controller->platform_data;
 324         sn_platform_data->provider_soft = provider_soft;
 325         INIT_LIST_HEAD(&((struct sn_platform_data *)
 326                          controller->platform_data)->pcidev_info);
 327         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 328         cnode = nasid_to_cnodeid(nasid);
 329         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 330         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 331             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 332
 333         /*
 334          * If the node information we obtained during the fixup phase is
 335          * invalid then set controller->node to -1 (undetermined)
 336          */
 337         if (controller->node >= num_online_nodes()) {
 338                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 339
 340                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
 341                        "L_IO=%llx L_MEM=%llx BASE=%llx\n",
 342                        b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 343                        b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 344                 printk(KERN_WARNING "on node %d but only %d nodes online."
 345                        "Association set to undetermined.\n",
 346                        controller->node, num_online_nodes());
 347                 controller->node = -1;
 348         }
 349 }
 350
 351 void sn_bus_store_sysdata(struct pci_dev *dev)
 352 {
 353         struct sysdata_el *element;
 354
 355         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
 356         if (!element) {
 357                 dev_dbg(&dev->dev, "%s: out of memory!\n", __func__);
 358                 return;
 359         }
 360         element->sysdata = SN_PCIDEV_INFO(dev);
 361         list_add(&element->entry, &sn_sysdata_list);
 362 }
 363
 364 void sn_bus_free_sysdata(void)
 365 {
 366         struct sysdata_el *element;
 367         struct list_head *list, *safe;
 368
 369         list_for_each_safe(list, safe, &sn_sysdata_list) {
 370                 element = list_entry(list, struct sysdata_el, entry);
 371                 list_del(&element->entry);
 372                 list_del(&(((struct pcidev_info *)
 373                              (element->sysdata))->pdi_list));
 374                 kfree(element->sysdata);
 375                 kfree(element);
 376         }
 377         return;
 378 }
 379
 380 /*
 381  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 382  *                      own NODE specific data area.
 383  */
 384 void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 385 {
 386         struct hubdev_info *hubdev_info;
 387         int size;
 388         pg_data_t *pg;
 389
 390         size = sizeof(struct hubdev_info);
 391
 392         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 393                 pg = NODE_DATA(0);
 394         else
 395                 pg = NODE_DATA(node);
 396
 397         hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
 398
 399         npda->pdinfo = (void *)hubdev_info;
 400 }
 401
 402 geoid_t
 403 cnodeid_get_geoid(cnodeid_t cnode)
 404 {
 405         struct hubdev_info *hubdev;
 406
 407         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 408         return hubdev->hdi_geoid;
 409 }
 410
 411 void sn_generate_path(struct pci_bus *pci_bus, char *address)
 412 {
 413         nasid_t nasid;
 414         cnodeid_t cnode;
 415         geoid_t geoid;
 416         moduleid_t moduleid;
 417         u16 bricktype;
 418
 419         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 420         cnode = nasid_to_cnodeid(nasid);
 421         geoid = cnodeid_get_geoid(cnode);
 422         moduleid = geo_module(geoid);
 423
 424         sprintf(address, "module_%c%c%c%c%.2d",
 425                 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
 426                 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
 427                 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
 428                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
 429
 430         /* Tollhouse requires slot id to be displayed */
 431         bricktype = MODULE_GET_BTYPE(moduleid);
 432         if ((bricktype == L1_BRICKTYPE_191010) ||
 433             (bricktype == L1_BRICKTYPE_1932))
 434                         sprintf(address + strlen(address), "^%d",
 435                                                 geo_slot(geoid));
 436 }
 437
 438 void __devinit
 439 sn_pci_fixup_bus(struct pci_bus *bus)
 440 {
 441
 442         if (SN_ACPI_BASE_SUPPORT())
 443                 sn_acpi_bus_fixup(bus);
 444         else
 445                 sn_bus_fixup(bus);
 446 }
 447
 448 /*
 449  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 450  *                    In particular, setup the sn_pci_provider[] array.
 451  *                    This needs to be done prior to any bus scanning
 452  *                    (acpi_scan_init()) in the ACPI case, as the SN
 453  *                    bus fixup code will reference the array.
 454  */
 455 static int __init
 456 sn_io_early_init(void)
 457 {
 458         int i;
 459
 460         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 461                 return 0;
 462
 463         /* we set the acpi revision to that of the DSDT table OEM rev. */
 464         {
 465                 struct acpi_table_header *header = NULL;
 466
 467                 acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 468                 BUG_ON(header == NULL);
 469                 sn_acpi_rev = header->oem_revision;
 470         }
 471
 472         /*
 473          * prime sn_pci_provider[].  Individual provider init routines will
 474          * override their respective default entries.
 475          */
 476
 477         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 478                 sn_pci_provider[i] = &sn_pci_default_provider;
 479
 480         pcibr_init_provider();
 481         tioca_init_provider();
 482         tioce_init_provider();
 483
 484         /*
 485          * This is needed to avoid bounce limit checks in the blk layer
 486          */
 487         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 488
 489         sn_irq_lh_init();
 490         INIT_LIST_HEAD(&sn_sysdata_list);
 491         sn_init_cpei_timer();
 492
 493 #ifdef CONFIG_PROC_FS
 494         register_sn_procfs();
 495 #endif
 496
 497         {
 498                 struct acpi_table_header *header;
 499                 (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 500                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 501                         header->oem_revision);
 502         }
 503         if (SN_ACPI_BASE_SUPPORT())
 504                 sn_io_acpi_init();
 505         else
 506                 sn_io_init();
 507         return 0;
 508 }
 509
 510 arch_initcall(sn_io_early_init);
 511
 512 /*
 513  * sn_io_late_init() - Perform any final platform specific IO initialization.
 514  */
 515
 516 int __init
 517 sn_io_late_init(void)
 518 {
 519         struct pci_bus *bus;
 520         struct pcibus_bussoft *bussoft;
 521         cnodeid_t cnode;
 522         nasid_t nasid;
 523         cnodeid_t near_cnode;
 524
 525         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 526                 return 0;
 527
 528         /*
 529          * Setup closest node in pci_controller->node for
 530          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
 531          * info from the PROM).
 532          */
 533         bus = NULL;
 534         while ((bus = pci_find_next_bus(bus)) != NULL) {
 535                 bussoft = SN_PCIBUS_BUSSOFT(bus);
 536                 nasid = NASID_GET(bussoft->bs_base);
 537                 cnode = nasid_to_cnodeid(nasid);
 538                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
 539                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
 540                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
 541                         /* PCI Bridge: find nearest node with CPUs */
 542                         int e = sn_hwperf_get_nearest_node(cnode, NULL,
 543                                                            &near_cnode);
 544                         if (e < 0) {
 545                                 near_cnode = (cnodeid_t)-1; /* use any node */
 546                                 printk(KERN_WARNING "sn_io_late_init: failed "
 547                                        "to find near node with CPUs for "
 548                                        "node %d, err=%d\n", cnode, e);
 549                         }
 550                         PCI_CONTROLLER(bus)->node = near_cnode;
 551                 }
 552         }
 553
 554         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
 555
 556         return 0;
 557 }
 558
 559 fs_initcall(sn_io_late_init);
 560
 561 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 562 EXPORT_SYMBOL(sn_bus_store_sysdata);
 563 EXPORT_SYMBOL(sn_bus_free_sysdata);
 564 EXPORT_SYMBOL(sn_generate_path);
 565