arch/ia64/sn/kernel/io_init.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) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/bootmem.h>
  10 #include <linux/nodemask.h>
  11 #include <asm/sn/types.h>
  12 #include <asm/sn/sn_sal.h>
  13 #include <asm/sn/addrs.h>
  14 #include <asm/sn/pcibus_provider_defs.h>
  15 #include <asm/sn/pcidev.h>
  16 #include "pci/pcibr_provider.h"
  17 #include "xtalk/xwidgetdev.h"
  18 #include <asm/sn/geo.h>
  19 #include "xtalk/hubdev.h"
  20 #include <asm/sn/io.h>
  21 #include <asm/sn/simulator.h>
  22 #include <asm/sn/tioca_provider.h>
  23
  24 char master_baseio_wid;
  25 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
  26
  27 struct slab_info {
  28         struct hubdev_info hubdev;
  29 };
  30
  31 struct brick {
  32         moduleid_t id;          /* Module ID of this module        */
  33         struct slab_info slab_info[MAX_SLABS + 1];
  34 };
  35
  36 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
  37
  38 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
  39
  40 /*
  41  * Hooks and struct for unsupported pci providers
  42  */
  43
  44 static dma_addr_t
  45 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
  46 {
  47         return 0;
  48 }
  49
  50 static void
  51 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
  52 {
  53         return;
  54 }
  55
  56 static void *
  57 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft)
  58 {
  59         return NULL;
  60 }
  61
  62 static struct sn_pcibus_provider sn_pci_default_provider = {
  63         .dma_map = sn_default_pci_map,
  64         .dma_map_consistent = sn_default_pci_map,
  65         .dma_unmap = sn_default_pci_unmap,
  66         .bus_fixup = sn_default_pci_bus_fixup,
  67 };
  68
  69 /*
  70  * Retrieve the DMA Flush List given nasid.  This list is needed
  71  * to implement the WAR - Flush DMA data on PIO Reads.
  72  */
  73 static inline uint64_t
  74 sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, u64 address)
  75 {
  76
  77         struct ia64_sal_retval ret_stuff;
  78         ret_stuff.status = 0;
  79         ret_stuff.v0 = 0;
  80
  81         SAL_CALL_NOLOCK(ret_stuff,
  82                         (u64) SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
  83                         (u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
  84                         0);
  85         return ret_stuff.v0;
  86
  87 }
  88
  89 /*
  90  * Retrieve the hub device info structure for the given nasid.
  91  */
  92 static inline uint64_t sal_get_hubdev_info(u64 handle, u64 address)
  93 {
  94
  95         struct ia64_sal_retval ret_stuff;
  96         ret_stuff.status = 0;
  97         ret_stuff.v0 = 0;
  98
  99         SAL_CALL_NOLOCK(ret_stuff,
 100                         (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
 101                         (u64) handle, (u64) address, 0, 0, 0, 0, 0);
 102         return ret_stuff.v0;
 103 }
 104
 105 /*
 106  * Retrieve the pci bus information given the bus number.
 107  */
 108 static inline uint64_t sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
 109 {
 110
 111         struct ia64_sal_retval ret_stuff;
 112         ret_stuff.status = 0;
 113         ret_stuff.v0 = 0;
 114
 115         SAL_CALL_NOLOCK(ret_stuff,
 116                         (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
 117                         (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
 118         return ret_stuff.v0;
 119 }
 120
 121 /*
 122  * Retrieve the pci device information given the bus and device|function number.
 123  */
 124 static inline uint64_t
 125 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
 126                         u64 sn_irq_info)
 127 {
 128         struct ia64_sal_retval ret_stuff;
 129         ret_stuff.status = 0;
 130         ret_stuff.v0 = 0;
 131
 132         SAL_CALL_NOLOCK(ret_stuff,
 133                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
 134                         (u64) segment, (u64) bus_number, (u64) devfn,
 135                         (u64) pci_dev,
 136                         sn_irq_info, 0, 0);
 137         return ret_stuff.v0;
 138 }
 139
 140 /*
 141  * sn_alloc_pci_sysdata() - This routine allocates a pci controller
 142  *      which is expected as the pci_dev and pci_bus sysdata by the Linux
 143  *      PCI infrastructure.
 144  */
 145 static inline struct pci_controller *sn_alloc_pci_sysdata(void)
 146 {
 147         struct pci_controller *pci_sysdata;
 148
 149         pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
 150         if (!pci_sysdata)
 151                 BUG();
 152
 153         memset(pci_sysdata, 0, sizeof(*pci_sysdata));
 154         return pci_sysdata;
 155 }
 156
 157 /*
 158  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
 159  *      each node in the system.
 160  */
 161 static void sn_fixup_ionodes(void)
 162 {
 163
 164         struct sn_flush_device_list *sn_flush_device_list;
 165         struct hubdev_info *hubdev;
 166         uint64_t status;
 167         uint64_t nasid;
 168         int i, widget;
 169
 170         for (i = 0; i < numionodes; i++) {
 171                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
 172                 nasid = cnodeid_to_nasid(i);
 173                 status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
 174                 if (status)
 175                         continue;
 176
 177                 /* Attach the error interrupt handlers */
 178                 if (nasid & 1)
 179                         ice_error_init(hubdev);
 180                 else
 181                         hub_error_init(hubdev);
 182
 183                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
 184                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
 185
 186                 if (!hubdev->hdi_flush_nasid_list.widget_p)
 187                         continue;
 188
 189                 hubdev->hdi_flush_nasid_list.widget_p =
 190                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
 191                             sizeof(struct sn_flush_device_list *), GFP_KERNEL);
 192
 193                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
 194                        (HUB_WIDGET_ID_MAX + 1) *
 195                        sizeof(struct sn_flush_device_list *));
 196
 197                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
 198                         sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
 199                                                        sizeof(struct
 200                                                               sn_flush_device_list),
 201                                                        GFP_KERNEL);
 202                         memset(sn_flush_device_list, 0x0,
 203                                DEV_PER_WIDGET *
 204                                sizeof(struct sn_flush_device_list));
 205
 206                         status =
 207                             sal_get_widget_dmaflush_list(nasid, widget,
 208                                                          (uint64_t)
 209                                                          __pa
 210                                                          (sn_flush_device_list));
 211                         if (status) {
 212                                 kfree(sn_flush_device_list);
 213                                 continue;
 214                         }
 215
 216                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
 217                             sn_flush_device_list;
 218                 }
 219
 220         }
 221
 222 }
 223
 224 /*
 225  * sn_pci_fixup_slot() - This routine sets up a slot's resources
 226  * consistent with the Linux PCI abstraction layer.  Resources acquired
 227  * from our PCI provider include PIO maps to BAR space and interrupt
 228  * objects.
 229  */
 230 static void sn_pci_fixup_slot(struct pci_dev *dev)
 231 {
 232         int idx;
 233         int segment = 0;
 234         uint64_t size;
 235         struct sn_irq_info *sn_irq_info;
 236         struct pci_dev *host_pci_dev;
 237         int status = 0;
 238         struct pcibus_bussoft *bs;
 239
 240         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 241         if (SN_PCIDEV_INFO(dev) <= 0)
 242                 BUG();          /* Cannot afford to run out of memory */
 243         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
 244
 245         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
 246         if (sn_irq_info <= 0)
 247                 BUG();          /* Cannot afford to run out of memory */
 248         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
 249
 250         /* Call to retrieve pci device information needed by kernel. */
 251         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
 252                                      dev->devfn,
 253                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
 254                                      (u64) __pa(sn_irq_info));
 255         if (status)
 256                 BUG();          /* Cannot get platform pci device information information */
 257
 258         /* Copy over PIO Mapped Addresses */
 259         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
 260                 unsigned long start, end, addr;
 261
 262                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
 263                         continue;
 264
 265                 start = dev->resource[idx].start;
 266                 end = dev->resource[idx].end;
 267                 size = end - start;
 268                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
 269                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
 270                 dev->resource[idx].start = addr;
 271                 dev->resource[idx].end = addr + size;
 272                 if (dev->resource[idx].flags & IORESOURCE_IO)
 273                         dev->resource[idx].parent = &ioport_resource;
 274                 else
 275                         dev->resource[idx].parent = &iomem_resource;
 276         }
 277
 278         /* set up host bus linkages */
 279         bs = SN_PCIBUS_BUSSOFT(dev->bus);
 280         host_pci_dev =
 281             pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
 282                           SN_PCIDEV_INFO(dev)->
 283                           pdi_slot_host_handle & 0xffffffff);
 284         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 285             SN_PCIDEV_INFO(host_pci_dev);
 286         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
 287         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 288
 289         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
 290                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
 291         } else {
 292                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
 293         }
 294
 295         /* Only set up IRQ stuff if this device has a host bus context */
 296         if (bs && sn_irq_info->irq_irq) {
 297                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 298                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 299                 sn_irq_fixup(dev, sn_irq_info);
 300         }
 301 }
 302
 303 /*
 304  * sn_pci_controller_fixup() - This routine sets up a bus's resources
 305  * consistent with the Linux PCI abstraction layer.
 306  */
 307 static void sn_pci_controller_fixup(int segment, int busnum)
 308 {
 309         int status = 0;
 310         int nasid, cnode;
 311         struct pci_bus *bus;
 312         struct pci_controller *controller;
 313         struct pcibus_bussoft *prom_bussoft_ptr;
 314         struct hubdev_info *hubdev_info;
 315         void *provider_soft;
 316         struct sn_pcibus_provider *provider;
 317
 318         status =
 319             sal_get_pcibus_info((u64) segment, (u64) busnum,
 320                                 (u64) ia64_tpa(&prom_bussoft_ptr));
 321         if (status > 0) {
 322                 return;         /* bus # does not exist */
 323         }
 324
 325         prom_bussoft_ptr = __va(prom_bussoft_ptr);
 326         controller = sn_alloc_pci_sysdata();
 327         /* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
 328
 329         bus = pci_scan_bus(busnum, &pci_root_ops, controller);
 330         if (bus == NULL) {
 331                 return;         /* error, or bus already scanned */
 332         }
 333
 334         /*
 335          * Per-provider fixup.  Copies the contents from prom to local
 336          * area and links SN_PCIBUS_BUSSOFT().
 337          */
 338
 339         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
 340                 return;         /* unsupported asic type */
 341         }
 342
 343         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
 344         if (provider == NULL) {
 345                 return;         /* no provider registerd for this asic */
 346         }
 347
 348         provider_soft = NULL;
 349         if (provider->bus_fixup) {
 350                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
 351         }
 352
 353         if (provider_soft == NULL) {
 354                 return;         /* fixup failed or not applicable */
 355         }
 356
 357         /*
 358          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
 359          * after this point.
 360          */
 361
 362         bus->sysdata = controller;
 363         PCI_CONTROLLER(bus)->platform_data = provider_soft;
 364
 365         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 366         cnode = nasid_to_cnodeid(nasid);
 367         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 368         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 369             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 370 }
 371
 372 /*
 373  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
 374  */
 375
 376 #define PCI_BUSES_TO_SCAN 256
 377
 378 static int __init sn_pci_init(void)
 379 {
 380         int i = 0;
 381         struct pci_dev *pci_dev = NULL;
 382         extern void sn_init_cpei_timer(void);
 383 #ifdef CONFIG_PROC_FS
 384         extern void register_sn_procfs(void);
 385 #endif
 386
 387         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_SIMULATOR())
 388                 return 0;
 389
 390         /*
 391          * prime sn_pci_provider[].  Individial provider init routines will
 392          * override their respective default entries.
 393          */
 394
 395         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
 396                 sn_pci_provider[i] = &sn_pci_default_provider;
 397
 398         pcibr_init_provider();
 399         tioca_init_provider();
 400
 401         /*
 402          * This is needed to avoid bounce limit checks in the blk layer
 403          */
 404         ia64_max_iommu_merge_mask = ~PAGE_MASK;
 405         sn_fixup_ionodes();
 406         sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
 407         if (sn_irq <= 0)
 408                 BUG();          /* Canno afford to run out of memory. */
 409         memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
 410
 411         sn_init_cpei_timer();
 412
 413 #ifdef CONFIG_PROC_FS
 414         register_sn_procfs();
 415 #endif
 416
 417         for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
 418                 sn_pci_controller_fixup(0, i);
 419         }
 420
 421         /*
 422          * Generic Linux PCI Layer has created the pci_bus and pci_dev
 423          * structures - time for us to add our SN PLatform specific
 424          * information.
 425          */
 426
 427         while ((pci_dev =
 428                 pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
 429                 sn_pci_fixup_slot(pci_dev);
 430         }
 431
 432         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
 433
 434         return 0;
 435 }
 436
 437 /*
 438  * hubdev_init_node() - Creates the HUB data structure and link them to it's
 439  *      own NODE specific data area.
 440  */
 441 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
 442 {
 443
 444         struct hubdev_info *hubdev_info;
 445
 446         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
 447                 hubdev_info =
 448                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
 449                                                              sizeof(struct
 450                                                                     hubdev_info));
 451         else
 452                 hubdev_info =
 453                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
 454                                                              sizeof(struct
 455                                                                     hubdev_info));
 456         npda->pdinfo = (void *)hubdev_info;
 457
 458 }
 459
 460 geoid_t
 461 cnodeid_get_geoid(cnodeid_t cnode)
 462 {
 463
 464         struct hubdev_info *hubdev;
 465
 466         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 467         return hubdev->hdi_geoid;
 468
 469 }
 470
 471 subsys_initcall(sn_pci_init);