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