linux/arch/ia64/sn/kernel/io_common.c
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   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
  32extern void sn_init_cpei_timer(void);
  33extern void register_sn_procfs(void);
  34extern void sn_io_acpi_init(void);
  35extern void sn_io_init(void);
  36
  37
  38static struct list_head sn_sysdata_list;
  39
  40/* sysdata list struct */
  41struct sysdata_el {
  42        struct list_head entry;
  43        void *sysdata;
  44};
  45
  46int sn_ioif_inited;             /* SN I/O infrastructure initialized? */
  47
  48int sn_acpi_rev;                /* SN ACPI revision */
  49EXPORT_SYMBOL_GPL(sn_acpi_rev);
  50
  51struct 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
  57static dma_addr_t
  58sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
  59{
  60        return 0;
  61}
  62
  63static void
  64sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  65{
  66        return;
  67}
  68
  69static void *
  70sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
  71{
  72        return NULL;
  73}
  74
  75static 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 */
  86static inline u64
  87sal_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 */
 105inline struct pcidev_info *
 106sn_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
 125static 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 = kcalloc(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 */
 155void __init
 156sn_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
 215void 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 */
 227void 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 */
 277void
 278sn_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
 351void 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
 364void 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 */
 384void __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
 402geoid_t
 403cnodeid_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
 411void 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
 438void sn_pci_fixup_bus(struct pci_bus *bus)
 439{
 440
 441        if (SN_ACPI_BASE_SUPPORT())
 442                sn_acpi_bus_fixup(bus);
 443        else
 444                sn_bus_fixup(bus);
 445}
 446
 447/*
 448 * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 449 *                    In particular, setup the sn_pci_provider[] array.
 450 *                    This needs to be done prior to any bus scanning
 451 *                    (acpi_scan_init()) in the ACPI case, as the SN
 452 *                    bus fixup code will reference the array.
 453 */
 454static int __init
 455sn_io_early_init(void)
 456{
 457        int i;
 458
 459        if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 460                return 0;
 461
 462        /* we set the acpi revision to that of the DSDT table OEM rev. */
 463        {
 464                struct acpi_table_header *header = NULL;
 465
 466                acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 467                BUG_ON(header == NULL);
 468                sn_acpi_rev = header->oem_revision;
 469        }
 470
 471        /*
 472         * prime sn_pci_provider[].  Individual provider init routines will
 473         * override their respective default entries.
 474         */
 475
 476        for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 477                sn_pci_provider[i] = &sn_pci_default_provider;
 478
 479        pcibr_init_provider();
 480        tioca_init_provider();
 481        tioce_init_provider();
 482
 483        sn_irq_lh_init();
 484        INIT_LIST_HEAD(&sn_sysdata_list);
 485        sn_init_cpei_timer();
 486
 487#ifdef CONFIG_PROC_FS
 488        register_sn_procfs();
 489#endif
 490
 491        {
 492                struct acpi_table_header *header;
 493                (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
 494                printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
 495                        header->oem_revision);
 496        }
 497        if (SN_ACPI_BASE_SUPPORT())
 498                sn_io_acpi_init();
 499        else
 500                sn_io_init();
 501        return 0;
 502}
 503
 504arch_initcall(sn_io_early_init);
 505
 506/*
 507 * sn_io_late_init() - Perform any final platform specific IO initialization.
 508 */
 509
 510int __init
 511sn_io_late_init(void)
 512{
 513        struct pci_bus *bus;
 514        struct pcibus_bussoft *bussoft;
 515        cnodeid_t cnode;
 516        nasid_t nasid;
 517        cnodeid_t near_cnode;
 518
 519        if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
 520                return 0;
 521
 522        /*
 523         * Setup closest node in pci_controller->node for
 524         * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
 525         * info from the PROM).
 526         */
 527        bus = NULL;
 528        while ((bus = pci_find_next_bus(bus)) != NULL) {
 529                bussoft = SN_PCIBUS_BUSSOFT(bus);
 530                nasid = NASID_GET(bussoft->bs_base);
 531                cnode = nasid_to_cnodeid(nasid);
 532                if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
 533                    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
 534                    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
 535                        /* PCI Bridge: find nearest node with CPUs */
 536                        int e = sn_hwperf_get_nearest_node(cnode, NULL,
 537                                                           &near_cnode);
 538                        if (e < 0) {
 539                                near_cnode = (cnodeid_t)-1; /* use any node */
 540                                printk(KERN_WARNING "sn_io_late_init: failed "
 541                                       "to find near node with CPUs for "
 542                                       "node %d, err=%d\n", cnode, e);
 543                        }
 544                        PCI_CONTROLLER(bus)->node = near_cnode;
 545                }
 546        }
 547
 548        sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
 549
 550        return 0;
 551}
 552
 553fs_initcall(sn_io_late_init);
 554
 555EXPORT_SYMBOL(sn_pci_unfixup_slot);
 556EXPORT_SYMBOL(sn_bus_store_sysdata);
 557EXPORT_SYMBOL(sn_bus_free_sysdata);
 558EXPORT_SYMBOL(sn_generate_path);
 559
 560