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/slab.h>
  11 #include <asm/sn/types.h>
  12 #include <asm/sn/addrs.h>
  13 #include <asm/sn/sn_feature_sets.h>
  14 #include <asm/sn/geo.h>
  15 #include <asm/sn/io.h>
  16 #include <asm/sn/l1.h>
  17 #include <asm/sn/module.h>
  18 #include <asm/sn/pcibr_provider.h>
  19 #include <asm/sn/pcibus_provider_defs.h>
  20 #include <asm/sn/pcidev.h>
  21 #include <asm/sn/simulator.h>
  22 #include <asm/sn/sn_sal.h>
  23 #include <asm/sn/tioca_provider.h>
  24 #include <asm/sn/tioce_provider.h>
  25 #include "xtalk/hubdev.h"
  26 #include "xtalk/xwidgetdev.h"
  27 #include <linux/acpi.h>
  28 #include <asm/sn/sn2/sn_hwperf.h>
  29 #include <asm/sn/acpi.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
 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         printk_once(KERN_WARNING
 132                 "PROM version < 4.50 -- implementing old PROM flush WAR\n");
 133
 134         war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
 135         BUG_ON(!war_list);
 136
 137         SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
 138                         nasid, widget, __pa(war_list), 0, 0, 0 ,0);
 139         if (isrv.status)
 140                 panic("sn_device_fixup_war failed: %s\n",
 141                       ia64_sal_strerror(isrv.status));
 142
 143         dev_entry = war_list + device;
 144         memcpy(common,dev_entry, sizeof(*common));
 145         kfree(war_list);
 146
 147         return isrv.status;
 148 }
 149
 150 /*
 151  * sn_common_hubdev_init() - This routine is called to initialize the HUB data
 152  *                           structure for each node in the system.
 153  */
 154 void __init
 155 sn_common_hubdev_init(struct hubdev_info *hubdev)
 156 {
 157
 158         struct sn_flush_device_kernel *sn_flush_device_kernel;
 159         struct sn_flush_device_kernel *dev_entry;
 160         s64 status;
 161         int widget, device, size;
 162
 163         /* Attach the error interrupt handlers */
 164         if (hubdev->hdi_nasid & 1)      /* If TIO */
 165                 ice_error_init(hubdev);
 166         else
 167                 hub_error_init(hubdev);
 168
 169         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 170                 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 171
 172         if (!hubdev->hdi_flush_nasid_list.widget_p)
 173                 return;
 174
 175         size = (HUB_WIDGET_ID_MAX + 1) *
 176                 sizeof(struct sn_flush_device_kernel *);
 177         hubdev->hdi_flush_nasid_list.widget_p =
 178                 kzalloc(size, GFP_KERNEL);
 179         BUG_ON(!hubdev->hdi_flush_nasid_list.widget_p);
 180
 181         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 182                 size = DEV_PER_WIDGET *
 183                         sizeof(struct sn_flush_device_kernel);
 184                 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
 185                 BUG_ON(!sn_flush_device_kernel);
 186
 187                 dev_entry = sn_flush_device_kernel;
 188                 for (device = 0; device < DEV_PER_WIDGET;
 189                      device++, dev_entry++) {
 190                         size = sizeof(struct sn_flush_device_common);
 191                         dev_entry->common = kzalloc(size, GFP_KERNEL);
 192                         BUG_ON(!dev_entry->common);
 193                         if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
 194                                 status = sal_get_device_dmaflush_list(
 195                                              hubdev->hdi_nasid, widget, device,
 196                                              (u64)(dev_entry->common));
 197                         else
 198                                 status = sn_device_fixup_war(hubdev->hdi_nasid,
 199                                                              widget, device,
 200                                                              dev_entry->common);
 201                         if (status != SALRET_OK)
 202                                 panic("SAL call failed: %s\n",
 203                                       ia64_sal_strerror(status));
 204
 205                         spin_lock_init(&dev_entry->sfdl_flush_lock);
 206                 }
 207
 208                 if (sn_flush_device_kernel)
 209                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 210                                                          sn_flush_device_kernel;
 211         }
 212 }
 213
 214 void sn_pci_unfixup_slot(struct pci_dev *dev)
 215 {
 216         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
 217
 218         sn_irq_unfixup(dev);
 219         pci_dev_put(host_pci_dev);
 220         pci_dev_put(dev);
 221 }
 222
 223 /*
 224  * sn_pci_fixup_slot()
 225  */
 226 void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
 227                        struct sn_irq_info *sn_irq_info)
 228 {
 229         int segment = pci_domain_nr(dev->bus);
 230         struct pcibus_bussoft *bs;
 231         struct pci_bus *host_pci_bus;
 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_bus = pci_find_bus(segment, bus_no);
 248         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 249
 250         pcidev_info->host_pci_dev = host_pci_dev;
 251         pcidev_info->pdi_linux_pcidev = dev;
 252         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
 253         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 254         pcidev_info->pdi_pcibus_info = bs;
 255
 256         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 257                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 258         } else {
 259                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 260         }
 261
 262         /* Only set up IRQ stuff if this device has a host bus context */
 263         if (bs && sn_irq_info->irq_irq) {
 264                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
 265                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
 266                 sn_irq_fixup(dev, sn_irq_info);
 267         } else {
 268                 pcidev_info->pdi_sn_irq_info = NULL;
 269                 kfree(sn_irq_info);
 270         }
 271 }
 272
 273 /*
 274  * sn_common_bus_fixup - Perform platform specific bus fixup.
 275  *                       Execute the ASIC specific fixup routine
 276  *                       for this bus.
 277  */
 278 void
 279 sn_common_bus_fixup(struct pci_bus *bus,
 280                     struct pcibus_bussoft *prom_bussoft_ptr)
 281 {
 282         int cnode;
 283         struct pci_controller *controller;
 284         struct hubdev_info *hubdev_info;
 285         int nasid;
 286         void *provider_soft;
 287         struct sn_pcibus_provider *provider;
 288         struct sn_platform_data *sn_platform_data;
 289
 290         controller = PCI_CONTROLLER(bus);
 291         /*
 292          * Per-provider fixup.  Copies the bus soft structure from prom
 293          * to local area and links SN_PCIBUS_BUSSOFT().
 294          */
 295
 296         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 297                 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
 298                        prom_bussoft_ptr->bs_asic_type);
 299                 return;
 300         }
 301
 302         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
 303                 return; /* no further fixup necessary */
 304
 305         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 306         if (provider == NULL)
 307                 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
 308                       prom_bussoft_ptr->bs_asic_type);
 309
 310         if (provider->bus_fixup)
 311                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
 312                                  controller);
 313         else
 314                 provider_soft = NULL;
 315
 316         /*
 317          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 318          * after this point.
 319          */
 320         controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
 321                                             GFP_KERNEL);
 322         BUG_ON(controller->platform_data == NULL);
 323         sn_platform_data =
 324                         (struct sn_platform_data *) controller->platform_data;
 325         sn_platform_data->provider_soft = provider_soft;
 326         INIT_LIST_HEAD(&((struct sn_platform_data *)
 327                          controller->platform_data)->pcidev_info);
 328         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 329         cnode = nasid_to_cnodeid(nasid);
 330         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 331         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 332             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 333
 334         /*
 335          * If the node information we obtained during the fixup phase is
 336          * invalid then set controller->node to -1 (undetermined)
 337          */
 338         if (controller->node >= num_online_nodes()) {
 339                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 340
 341                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
 342                        "L_IO=%llx L_MEM=%llx BASE=%llx\n",
 343                        b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 344                        b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
 345                 printk(KERN_WARNING "on node %d but only %d nodes online."
 346                        "Association set to undetermined.\n",
 347                        controller->node, num_online_nodes());
 348                 controller->node = -1;
 349         }
 350 }
 351
 352 void sn_bus_store_sysdata(struct pci_dev *dev)
 353 {
 354         struct sysdata_el *element;
 355
 356         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
 357         if (!element) {
 358                 dev_dbg(&dev->dev, "%s: out of memory!\n", __func__);
 359                 return;
 360         }
 361         element->sysdata = SN_PCIDEV_INFO(dev);
 362         list_add(&element->entry, &sn_sysdata_list);
 363 }
 364
 365 void sn_bus_free_sysdata(void)
 366 {
 367         struct sysdata_el *element;
 368         struct list_head *list, *safe;
 369
 370         list_for_each_safe(list, safe, &sn_sysdata_list) {
 371                 element = list_entry(list, struct sysdata_el, entry);
 372                 list_del(&element->entry);
 373                 list_del(&(((struct pcidev_info *)
 374                              (element->sysdata))->pdi_list));
 375                 kfree(element->sysdata);
 376                 kfree(element);
 377         }
 378         return;
 379 }
 380
 381 /*
 382  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 383  *                      own NODE specific data area.
 384  */
 385 void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 386 {
 387         struct hubdev_info *hubdev_info;
 388         int size;
 389         pg_data_t *pg;
 390
 391         size = sizeof(struct hubdev_info);
 392
 393         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 394                 pg = NODE_DATA(0);
 395         else
 396                 pg = NODE_DATA(node);
 397
 398         hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
 399
 400         npda->pdinfo = (void *)hubdev_info;
 401 }
 402
 403 geoid_t
 404 cnodeid_get_geoid(cnodeid_t cnode)
 405 {
 406         struct hubdev_info *hubdev;
 407
 408         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 409         return hubdev->hdi_geoid;
 410 }
 411
 412 void sn_generate_path(struct pci_bus *pci_bus, char *address)
 413 {
 414         nasid_t nasid;
 415         cnodeid_t cnode;
 416         geoid_t geoid;
 417         moduleid_t moduleid;
 418         u16 bricktype;
 419
 420         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 421         cnode = nasid_to_cnodeid(nasid);
 422         geoid = cnodeid_get_geoid(cnode);
 423         moduleid = geo_module(geoid);
 424
 425         sprintf(address, "module_%c%c%c%c%.2d",
 426                 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
 427                 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
 428                 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
 429                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
 430
 431         /* Tollhouse requires slot id to be displayed */
 432         bricktype = MODULE_GET_BTYPE(moduleid);
 433         if ((bricktype == L1_BRICKTYPE_191010) ||
 434             (bricktype == L1_BRICKTYPE_1932))
 435                         sprintf(address + strlen(address), "^%d",
 436                                                 geo_slot(geoid));
 437 }
 438
 439 void __devinit
 440 sn_pci_fixup_bus(struct pci_bus *bus)
 441 {
 442
 443         if (SN_ACPI_BASE_SUPPORT())
 444                 sn_acpi_bus_fixup(bus);
 445         else
 446                 sn_bus_fixup(bus);
 447 }
 448
 449 /*
 450  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 451  *                    In particular, setup the sn_pci_provider[] array.
 452  *                    This needs to be done prior to any bus scanning
 453  *                    (acpi_scan_init()) in the ACPI case, as the SN
 454  *                    bus fixup code will reference the array.
 455  */
 456 static int __init
 457 sn_io_early_init(void)
 458 {
 459         int i;
 460
 461         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 462                 return 0;
 463
 464         /* we set the acpi revision to that of the DSDT table OEM rev. */
 465         {
 466                 struct acpi_table_header *header = NULL;
 467
 468                 acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 469                 BUG_ON(header == NULL);
 470                 sn_acpi_rev = header->oem_revision;
 471         }
 472
 473         /*
 474          * prime sn_pci_provider[].  Individual provider init routines will
 475          * override their respective default entries.
 476          */
 477
 478         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 479                 sn_pci_provider[i] = &sn_pci_default_provider;
 480
 481         pcibr_init_provider();
 482         tioca_init_provider();
 483         tioce_init_provider();
 484
 485         /*
 486          * This is needed to avoid bounce limit checks in the blk layer
 487          */
 488         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 489
 490         sn_irq_lh_init();
 491         INIT_LIST_HEAD(&sn_sysdata_list);
 492         sn_init_cpei_timer();
 493
 494 #ifdef CONFIG_PROC_FS
 495         register_sn_procfs();
 496 #endif
 497
 498         {
 499                 struct acpi_table_header *header;
 500                 (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 501                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 502                         header->oem_revision);
 503         }
 504         if (SN_ACPI_BASE_SUPPORT())
 505                 sn_io_acpi_init();
 506         else
 507                 sn_io_init();
 508         return 0;
 509 }
 510
 511 arch_initcall(sn_io_early_init);
 512
 513 /*
 514  * sn_io_late_init() - Perform any final platform specific IO initialization.
 515  */
 516
 517 int __init
 518 sn_io_late_init(void)
 519 {
 520         struct pci_bus *bus;
 521         struct pcibus_bussoft *bussoft;
 522         cnodeid_t cnode;
 523         nasid_t nasid;
 524         cnodeid_t near_cnode;
 525
 526         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 527                 return 0;
 528
 529         /*
 530          * Setup closest node in pci_controller->node for
 531          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
 532          * info from the PROM).
 533          */
 534         bus = NULL;
 535         while ((bus = pci_find_next_bus(bus)) != NULL) {
 536                 bussoft = SN_PCIBUS_BUSSOFT(bus);
 537                 nasid = NASID_GET(bussoft->bs_base);
 538                 cnode = nasid_to_cnodeid(nasid);
 539                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
 540                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
 541                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
 542                         /* PCI Bridge: find nearest node with CPUs */
 543                         int e = sn_hwperf_get_nearest_node(cnode, NULL,
 544                                                            &near_cnode);
 545                         if (e < 0) {
 546                                 near_cnode = (cnodeid_t)-1; /* use any node */
 547                                 printk(KERN_WARNING "sn_io_late_init: failed "
 548                                        "to find near node with CPUs for "
 549                                        "node %d, err=%d\n", cnode, e);
 550                         }
 551                         PCI_CONTROLLER(bus)->node = near_cnode;
 552                 }
 553         }
 554
 555         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
 556
 557         return 0;
 558 }
 559
 560 fs_initcall(sn_io_late_init);
 561
 562 EXPORT_SYMBOL(sn_pci_unfixup_slot);
 563 EXPORT_SYMBOL(sn_bus_store_sysdata);
 564 EXPORT_SYMBOL(sn_bus_free_sysdata);
 565 EXPORT_SYMBOL(sn_generate_path);
 566