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 #include "acpi/acglobal.h"
  30
  31 extern void sn_init_cpei_timer(void);
  32 extern void register_sn_procfs(void);
  33 extern void sn_io_acpi_init(void);
  34 extern void sn_io_init(void);
  35
  36
  37 static struct list_head sn_sysdata_list;
  38
  39 /* sysdata list struct */
  40 struct sysdata_el {
  41         struct list_head entry;
  42         void *sysdata;
  43 };
  44
  45 int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
  46
  47 int sn_acpi_rev;                /* SN ACPI revision */
  48 EXPORT_SYMBOL_GPL(sn_acpi_rev);
  49
  50 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  51
  52 /*
  53  * Hooks and struct for unsupported pci providers
  54  */
  55
  56 static dma_addr_t
  57 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
  58 {
  59         return 0;
  60 }
  61
  62 static void
  63 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  64 {
  65         return;
  66 }
  67
  68 static void *
  69 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
  70 {
  71         return NULL;
  72 }
  73
  74 static struct sn_pcibus_provider sn_pci_default_provider = {
  75         .dma_map = sn_default_pci_map,
  76         .dma_map_consistent = sn_default_pci_map,
  77         .dma_unmap = sn_default_pci_unmap,
  78         .bus_fixup = sn_default_pci_bus_fixup,
  79 };
  80
  81 /*
  82  * Retrieve the DMA Flush List given nasid, widget, and device.
  83  * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
  84  */
  85 static inline u64
  86 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
  87                              u64 address)
  88 {
  89         struct ia64_sal_retval ret_stuff;
  90         ret_stuff.status = 0;
  91         ret_stuff.v0 = 0;
  92
  93         SAL_CALL_NOLOCK(ret_stuff,
  94                         (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
  95                         (u64) nasid, (u64) widget_num,
  96                         (u64) device_num, (u64) address, 0, 0, 0);
  97         return ret_stuff.status;
  98 }
  99
 100 /*
 101  * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
 102  *                        device.
 103  */
 104 inline struct pcidev_info *
 105 sn_pcidev_info_get(struct pci_dev *dev)
 106 {
 107         struct pcidev_info *pcidev;
 108
 109         list_for_each_entry(pcidev,
 110                             &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
 111                 if (pcidev->pdi_linux_pcidev == dev)
 112                         return pcidev;
 113         }
 114         return NULL;
 115 }
 116
 117 /* Older PROM flush WAR
 118  *
 119  * 01/16/06 -- This war will be in place until a new official PROM is released.
 120  * Additionally note that the struct sn_flush_device_war also has to be
 121  * removed from arch/ia64/sn/include/xtalk/hubdev.h
 122  */
 123 static u8 war_implemented = 0;
 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         if (!war_implemented) {
 133                 printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
 134                        "PROM flush WAR\n");
 135                 war_implemented = 1;
 136         }
 137
 138         war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
 139         if (!war_list)
 140                 BUG();
 141
 142         SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
 143                         nasid, widget, __pa(war_list), 0, 0, 0 ,0);
 144         if (isrv.status)
 145                 panic("sn_device_fixup_war failed: %s\n",
 146                       ia64_sal_strerror(isrv.status));
 147
 148         dev_entry = war_list + device;
 149         memcpy(common,dev_entry, sizeof(*common));
 150         kfree(war_list);
 151
 152         return isrv.status;
 153 }
 154
 155 /*
 156  * sn_common_hubdev_init() - This routine is called to initialize the HUB data
 157  *                           structure for each node in the system.
 158  */
 159 void __init
 160 sn_common_hubdev_init(struct hubdev_info *hubdev)
 161 {
 162
 163         struct sn_flush_device_kernel *sn_flush_device_kernel;
 164         struct sn_flush_device_kernel *dev_entry;
 165         s64 status;
 166         int widget, device, size;
 167
 168         /* Attach the error interrupt handlers */
 169         if (hubdev->hdi_nasid & 1)      /* If TIO */
 170                 ice_error_init(hubdev);
 171         else
 172                 hub_error_init(hubdev);
 173
 174         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 175                 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 176
 177         if (!hubdev->hdi_flush_nasid_list.widget_p)
 178                 return;
 179
 180         size = (HUB_WIDGET_ID_MAX + 1) *
 181                 sizeof(struct sn_flush_device_kernel *);
 182         hubdev->hdi_flush_nasid_list.widget_p =
 183                 kzalloc(size, GFP_KERNEL);
 184         if (!hubdev->hdi_flush_nasid_list.widget_p)
 185                 BUG();
 186
 187         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 188                 size = DEV_PER_WIDGET *
 189                         sizeof(struct sn_flush_device_kernel);
 190                 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
 191                 if (!sn_flush_device_kernel)
 192                         BUG();
 193
 194                 dev_entry = sn_flush_device_kernel;
 195                 for (device = 0; device < DEV_PER_WIDGET;
 196                      device++, dev_entry++) {
 197                         size = sizeof(struct sn_flush_device_common);
 198                         dev_entry->common = kzalloc(size, GFP_KERNEL);
 199                         if (!dev_entry->common)
 200                                 BUG();
 201                         if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
 202                                 status = sal_get_device_dmaflush_list(
 203                                              hubdev->hdi_nasid, widget, device,
 204                                              (u64)(dev_entry->common));
 205                         else
 206                                 status = sn_device_fixup_war(hubdev->hdi_nasid,
 207                                                              widget, device,
 208                                                              dev_entry->common);
 209                         if (status != SALRET_OK)
 210                                 panic("SAL call failed: %s\n",
 211                                       ia64_sal_strerror(status));
 212
 213                         spin_lock_init(&dev_entry->sfdl_flush_lock);
 214                 }
 215
 216                 if (sn_flush_device_kernel)
 217                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 218                                                          sn_flush_device_kernel;
 219         }
 220 }
 221
 222 void sn_pci_unfixup_slot(struct pci_dev *dev)
 223 {
 224         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 225
 226         sn_irq_unfixup(dev);
 227         pci_dev_put(host_pci_dev);
 228         pci_dev_put(dev);
 229 }
 230
 231 /*
 232  * sn_pci_fixup_slot()
 233  */
 234 void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
 235                        struct sn_irq_info *sn_irq_info)
 236 {
 237         int segment = pci_domain_nr(dev->bus);
 238         struct pcibus_bussoft *bs;
 239         struct pci_bus *host_pci_bus;
 240         struct pci_dev *host_pci_dev;
 241         unsigned int bus_no, devfn;
 242
 243         pci_dev_get(dev); /* for the sysdata pointer */
 244
 245         /* Add pcidev_info to list in pci_controller.platform_data */
 246         list_add_tail(&pcidev_info->pdi_list,
 247                       &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
 248         /*
 249          * Using the PROMs values for the PCI host bus, get the Linux
 250          * PCI host_pci_dev struct and set up host bus linkages
 251          */
 252
 253         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
 254         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
 255         host_pci_bus = pci_find_bus(segment, bus_no);
 256         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 257
 258         pcidev_info->host_pci_dev = host_pci_dev;
 259         pcidev_info->pdi_linux_pcidev = dev;
 260         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
 261         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 262         pcidev_info->pdi_pcibus_info = bs;
 263
 264         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 265                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 266         } else {
 267                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 268         }
 269
 270         /* Only set up IRQ stuff if this device has a host bus context */
 271         if (bs && sn_irq_info->irq_irq) {
 272                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
 273                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
 274                 sn_irq_fixup(dev, sn_irq_info);
 275         } else {
 276                 pcidev_info->pdi_sn_irq_info = NULL;
 277                 kfree(sn_irq_info);
 278         }
 279 }
 280
 281 /*
 282  * sn_common_bus_fixup - Perform platform specific bus fixup.
 283  *                       Execute the ASIC specific fixup routine
 284  *                       for this bus.
 285  */
 286 void
 287 sn_common_bus_fixup(struct pci_bus *bus,
 288                     struct pcibus_bussoft *prom_bussoft_ptr)
 289 {
 290         int cnode;
 291         struct pci_controller *controller;
 292         struct hubdev_info *hubdev_info;
 293         int nasid;
 294         void *provider_soft;
 295         struct sn_pcibus_provider *provider;
 296         struct sn_platform_data *sn_platform_data;
 297
 298         controller = PCI_CONTROLLER(bus);
 299         /*
 300          * Per-provider fixup.  Copies the bus soft structure from prom
 301          * to local area and links SN_PCIBUS_BUSSOFT().
 302          */
 303
 304         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 305                 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
 306                        prom_bussoft_ptr->bs_asic_type);
 307                 return;
 308         }
 309
 310         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 311                 return; /* no further fixup necessary */
 312
 313         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 314         if (provider == NULL)
 315                 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
 316                       prom_bussoft_ptr->bs_asic_type);
 317
 318         if (provider->bus_fixup)
 319                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
 320                                  controller);
 321         else
 322                 provider_soft = NULL;
 323
 324         /*
 325          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 326          * after this point.
 327          */
 328         controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
 329                                             GFP_KERNEL);
 330         if (controller->platform_data == NULL)
 331                 BUG();
 332         sn_platform_data =
 333                         (struct sn_platform_data *) controller->platform_data;
 334         sn_platform_data->provider_soft = provider_soft;
 335         INIT_LIST_HEAD(&((struct sn_platform_data *)
 336                          controller->platform_data)->pcidev_info);
 337         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 338         cnode = nasid_to_cnodeid(nasid);
 339         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 340         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 341             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 342
 343         /*
 344          * If the node information we obtained during the fixup phase is
 345          * invalid then set controller->node to -1 (undetermined)
 346          */
 347         if (controller->node >= num_online_nodes()) {
 348                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 349
 350                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
 351                        "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 352                        b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 353                        b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 354                 printk(KERN_WARNING "on node %d but only %d nodes online."
 355                        "Association set to undetermined.\n",
 356                        controller->node, num_online_nodes());
 357                 controller->node = -1;
 358         }
 359 }
 360
 361 void sn_bus_store_sysdata(struct pci_dev *dev)
 362 {
 363         struct sysdata_el *element;
 364
 365         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
 366         if (!element) {
 367                 dev_dbg(&dev->dev, "%s: out of memory!\n", __func__);
 368                 return;
 369         }
 370         element->sysdata = SN_PCIDEV_INFO(dev);
 371         list_add(&element->entry, &sn_sysdata_list);
 372 }
 373
 374 void sn_bus_free_sysdata(void)
 375 {
 376         struct sysdata_el *element;
 377         struct list_head *list, *safe;
 378
 379         list_for_each_safe(list, safe, &sn_sysdata_list) {
 380                 element = list_entry(list, struct sysdata_el, entry);
 381                 list_del(&element->entry);
 382                 list_del(&(((struct pcidev_info *)
 383                              (element->sysdata))->pdi_list));
 384                 kfree(element->sysdata);
 385                 kfree(element);
 386         }
 387         return;
 388 }
 389
 390 /*
 391  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 392  *                      own NODE specific data area.
 393  */
 394 void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 395 {
 396         struct hubdev_info *hubdev_info;
 397         int size;
 398         pg_data_t *pg;
 399
 400         size = sizeof(struct hubdev_info);
 401
 402         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 403                 pg = NODE_DATA(0);
 404         else
 405                 pg = NODE_DATA(node);
 406
 407         hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
 408
 409         npda->pdinfo = (void *)hubdev_info;
 410 }
 411
 412 geoid_t
 413 cnodeid_get_geoid(cnodeid_t cnode)
 414 {
 415         struct hubdev_info *hubdev;
 416
 417         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 418         return hubdev->hdi_geoid;
 419 }
 420
 421 void sn_generate_path(struct pci_bus *pci_bus, char *address)
 422 {
 423         nasid_t nasid;
 424         cnodeid_t cnode;
 425         geoid_t geoid;
 426         moduleid_t moduleid;
 427         u16 bricktype;
 428
 429         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 430         cnode = nasid_to_cnodeid(nasid);
 431         geoid = cnodeid_get_geoid(cnode);
 432         moduleid = geo_module(geoid);
 433
 434         sprintf(address, "module_%c%c%c%c%.2d",
 435                 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
 436                 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
 437                 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
 438                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
 439
 440         /* Tollhouse requires slot id to be displayed */
 441         bricktype = MODULE_GET_BTYPE(moduleid);
 442         if ((bricktype == L1_BRICKTYPE_191010) ||
 443             (bricktype == L1_BRICKTYPE_1932))
 444                         sprintf(address, "%s^%d", address, geo_slot(geoid));
 445 }
 446
 447 void __devinit
 448 sn_pci_fixup_bus(struct pci_bus *bus)
 449 {
 450
 451         if (SN_ACPI_BASE_SUPPORT())
 452                 sn_acpi_bus_fixup(bus);
 453         else
 454                 sn_bus_fixup(bus);
 455 }
 456
 457 /*
 458  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 459  *                    In particular, setup the sn_pci_provider[] array.
 460  *                    This needs to be done prior to any bus scanning
 461  *                    (acpi_scan_init()) in the ACPI case, as the SN
 462  *                    bus fixup code will reference the array.
 463  */
 464 static int __init
 465 sn_io_early_init(void)
 466 {
 467         int i;
 468
 469         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 470                 return 0;
 471
 472         /* we set the acpi revision to that of the DSDT table OEM rev. */
 473         {
 474                 struct acpi_table_header *header = NULL;
 475
 476                 acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
 477                 BUG_ON(header == NULL);
 478                 sn_acpi_rev = header->oem_revision;
 479         }
 480
 481         /*
 482          * prime sn_pci_provider[].  Individual provider init routines will
 483          * override their respective default entries.
 484          */
 485
 486         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 487                 sn_pci_provider[i] = &sn_pci_default_provider;
 488
 489         pcibr_init_provider();
 490         tioca_init_provider();
 491         tioce_init_provider();
 492
 493         /*
 494          * This is needed to avoid bounce limit checks in the blk layer
 495          */
 496         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 497
 498         sn_irq_lh_init();
 499         INIT_LIST_HEAD(&sn_sysdata_list);
 500         sn_init_cpei_timer();
 501
 502 #ifdef CONFIG_PROC_FS
 503         register_sn_procfs();
 504 #endif
 505
 506         {
 507                 struct acpi_table_header *header;
 508                 (void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
 509                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 510                         header->oem_revision);
 511         }
 512         if (SN_ACPI_BASE_SUPPORT())
 513                 sn_io_acpi_init();
 514         else
 515                 sn_io_init();
 516         return 0;
 517 }
 518
 519 arch_initcall(sn_io_early_init);
 520
 521 /*
 522  * sn_io_late_init() - Perform any final platform specific IO initialization.
 523  */
 524
 525 int __init
 526 sn_io_late_init(void)
 527 {
 528         struct pci_bus *bus;
 529         struct pcibus_bussoft *bussoft;
 530         cnodeid_t cnode;
 531         nasid_t nasid;
 532         cnodeid_t near_cnode;
 533
 534         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 535                 return 0;
 536
 537         /*
 538          * Setup closest node in pci_controller->node for
 539          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
 540          * info from the PROM).
 541          */
 542         bus = NULL;
 543         while ((bus = pci_find_next_bus(bus)) != NULL) {
 544                 bussoft = SN_PCIBUS_BUSSOFT(bus);
 545                 nasid = NASID_GET(bussoft->bs_base);
 546                 cnode = nasid_to_cnodeid(nasid);
 547                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
 548                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
 549                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
 550                         /* PCI Bridge: find nearest node with CPUs */
 551                         int e = sn_hwperf_get_nearest_node(cnode, NULL,
 552                                                            &near_cnode);
 553                         if (e < 0) {
 554                                 near_cnode = (cnodeid_t)-1; /* use any node */
 555                                 printk(KERN_WARNING "sn_io_late_init: failed "
 556                                        "to find near node with CPUs for "
 557                                        "node %d, err=%d\n", cnode, e);
 558                         }
 559                         PCI_CONTROLLER(bus)->node = near_cnode;
 560                 }
 561         }
 562
 563         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
 564
 565         return 0;
 566 }
 567
 568 fs_initcall(sn_io_late_init);
 569
 570 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 571 EXPORT_SYMBOL(sn_bus_store_sysdata);
 572 EXPORT_SYMBOL(sn_bus_free_sysdata);
 573 EXPORT_SYMBOL(sn_generate_path);
 574